CA1261581A - Spin-welding apparatus - Google Patents
Spin-welding apparatusInfo
- Publication number
- CA1261581A CA1261581A CA000509870A CA509870A CA1261581A CA 1261581 A CA1261581 A CA 1261581A CA 000509870 A CA000509870 A CA 000509870A CA 509870 A CA509870 A CA 509870A CA 1261581 A CA1261581 A CA 1261581A
- Authority
- CA
- Canada
- Prior art keywords
- servo motor
- components
- spin
- welding
- motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/06—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using friction, e.g. spin welding
- B29C65/0672—Spin welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/06—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using friction, e.g. spin welding
- B29C65/069—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using friction, e.g. spin welding the welding tool cooperating with specially formed features of at least one of the parts to be joined, e.g. cooperating with holes or ribs of at least one of the parts to be joined
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
- B29C66/1222—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a lapped joint-segment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
- B29C66/1224—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a butt joint-segment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/128—Stepped joint cross-sections
- B29C66/1282—Stepped joint cross-sections comprising at least one overlap joint-segment
- B29C66/12821—Stepped joint cross-sections comprising at least one overlap joint-segment comprising at least two overlap joint-segments
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/128—Stepped joint cross-sections
- B29C66/1284—Stepped joint cross-sections comprising at least one butt joint-segment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/302—Particular design of joint configurations the area to be joined comprising melt initiators
- B29C66/3022—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral with at least one of the parts to be joined
- B29C66/30223—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral with at least one of the parts to be joined said melt initiators being rib-like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/53—Joining single elements to tubular articles, hollow articles or bars
- B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
- B29C66/5344—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/61—Joining from or joining on the inside
- B29C66/612—Making circumferential joints
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
- B29C66/822—Transmission mechanisms
- B29C66/8221—Scissor or lever mechanisms, i.e. involving a pivot point
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
- B29C66/822—Transmission mechanisms
- B29C66/8222—Pinion or rack mechanisms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
- B29C66/824—Actuating mechanisms
- B29C66/8242—Pneumatic or hydraulic drives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/832—Reciprocating joining or pressing tools
- B29C66/8322—Joining or pressing tools reciprocating along one axis
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/93—Measuring or controlling the joining process by measuring or controlling the speed
- B29C66/934—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed
- B29C66/93441—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed the speed being non-constant over time
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/93—Measuring or controlling the joining process by measuring or controlling the speed
- B29C66/934—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed
- B29C66/93451—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed by controlling or regulating the rotational speed, i.e. the speed of revolution
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
- B29C66/824—Actuating mechanisms
- B29C66/8246—Servomechanisms, e.g. servomotors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
- B29C66/924—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools
- B29C66/9241—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force or the mechanical power
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
- B29C66/929—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools characterized by specific pressure, force, mechanical power or displacement values or ranges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/94—Measuring or controlling the joining process by measuring or controlling the time
- B29C66/949—Measuring or controlling the joining process by measuring or controlling the time characterised by specific time values or ranges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/95—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94
- B29C66/959—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 characterised by specific values or ranges of said specific variables
- B29C66/9592—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 characterised by specific values or ranges of said specific variables in explicit relation to another variable, e.g. X-Y diagrams
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
- Y10T156/1702—For plural parts or plural areas of single part
- Y10T156/1744—Means bringing discrete articles into assembled relationship
- Y10T156/1768—Means simultaneously conveying plural articles from a single source and serially presenting them to an assembly station
- Y10T156/1771—Turret or rotary drum-type conveyor
Abstract
SPIN-WELDING APPARATUS
ABSTRACT
Apparatus for spin-welding comprises a spin welding machine having a spin welding head, a ram assembly, and a feed mechanism, the ram assembly is driven from a shaft and the feed mechanism comprises a rotating turret mounted on a shaft which is driven from the shaft via a Geneva mechanism. The spin welding head is driven by a low inertia DC servo motor operated by a programmable logic controller and timed from a switch unit driven off the shaft.
ABSTRACT
Apparatus for spin-welding comprises a spin welding machine having a spin welding head, a ram assembly, and a feed mechanism, the ram assembly is driven from a shaft and the feed mechanism comprises a rotating turret mounted on a shaft which is driven from the shaft via a Geneva mechanism. The spin welding head is driven by a low inertia DC servo motor operated by a programmable logic controller and timed from a switch unit driven off the shaft.
Description
~L 2 ~j~LS ~3~L
SPIN-WELDING APPARATUS
BACKGROUND TO THE INVENTION
The invention relates to apparatus for spin-welding, which is a known technique for welding together plastics components which are assembled 5 with opposed annular surFaces, in which one of the components ls spun at high speed relative to the other to cause melting and subsequent fusion of the plastics material at the interface of the opposed surfaces.
DESCRIPTION OF THE PRIOR ART
lo In known methods of spin welding the energy for the weld is generally provided by a rotating chuck. In a first type of known method pre-assembled articles to be spin welded are mounted on a chuck which is brought into and out of engagement with a rotating drive motor and are spun thereby for a period sufficient to create a weld. In a 15 second known method one of the components of the article to be welded is rotated at high speed on a chuck and is subsequently brought into engagement with the other component. Drive to the chuck is discontinued, and the two components are welded together as the energy of rotation of the chuck is dissipated as frictional heat at the 20 component interface. In both the prior methods precise contro1 of the duration of the weld process and the amount of frictional heat generated at the weld are difficult to achieve.
SUMMARY OF THE INYENTION
According to the invention there is provided a spin welding apparatus 25 for welding together opposed surfaces of thermoplastics components which are assembled together prior to welding, comprising a spin ,~
~26~
welding head for spinning one of the components relative to the other and a low inertia DC servo motor for driving the spin welding head, wherein the drive of the servo motor is governed by control means to prov:ide initial 810w speed spinning to ensure correct take-up of drive to the components, rapid acceleration to weld process speed, maintenance of process speed for a re~uired period, and final rapid decelera-tionand stopping of the motor.
Another aspect of the invention comprehends spin welding apparatus for welding together opposed surfaces of thermoplastics components which are assembled together prior to welding, comprising a spin welding head for spinning one of the components relative to the other and a low inertia DC servo motor operatively connected to the spin welding head, wherein the d~ive of the servo motor is governed by a programmable logic controller means programmed for consecutively providing initial slow speed spinning to ensure correct take-up of drive to one of the componénts and arrest of the other component, rapid acceleration of the one component to weld process speed, maintenance of process speed for a required period, and final rapid deceleration and stopping of -the motor.
BRIEF DESCRIPTION OF THE DRAWINGS
FIGURE 1 shows a longitudinal section through a cylindrical container body and an end component therefor FIGURE 2 is a side view of a spin-welding machine;
~2~
FIGURE 3 is a diagrammatic sectional view of the machine of Figure 2 taken along line A - A;
FIGURE 4 is a longitudinal sectional view through the spin-welding head of the machine;
FIGURE 5 is an enlarged view of part of -the spin-welding head showing a container body and end component engaged therewith;
FIGURE 6 is a side elevational view of a device for exerting radial compressive pressure which is mounted on the spin-welding head;
FIGURE 7 is a diagrammatic sketch showing the overlap of a wire cable employed in the spin-welding head of the machine as shown with Figure 5;
......
,.. ,;,~ ;
6~L~ 3L
FIGURE 8 is a graph~c representation of the mach~ne cycle;
FIGURE 9 ~s a diagrammat~c time/velocity graph for the spin motor of the machine;
FIGURE lO ~s a block diagram showing the control system for the sp~n-weldlng mach~ne; and FIGURE ll is a block diagram show~ng the control system for the devlce shown ~n F~gure 6.
DETAILED DESCRIPTION OF THE _INVENTION
Referring to Figure l, there ~s shown a conta~ner comprising a moulded 0 plastics cyl~ndrical body l provided with an ~ntegral bottom panel 2 and a plug fit end component in the form o~ a moulded plast~cs r~ng 3 adapted to be assembled into the open end of the body. The bottom panel of the body has a plurality of external webs 4 whlch engage fixed p~ns located on the ram of-the mach~né such that they prevent the body rotat~ng during weld~ng. The r~ng 3 also has a number of external webs 5 which engage one or more drlving p~n~ ln the sp~nn~ng head of the mach~ne and thereby prov~de dr~ve for the sp~n-weld~ng process. Components such as shown ~n F~gure l ~re descr~bed ~n greater deta~l in our co-pend~ng Canadian patent application No.
507,787 filed April 28, 1986.
As shown ~n F~gure 2, the sp~n-weld~ng mach~ne fs supported on a frame 6 and has a maln AC dr~ve motor 7 driv~ng a pr~mary dr~ve shaft 8 through a geared speed reduct~on un~t 9, dr~ve belt 90, and a pneumat~c clutch lO. The clutch ~s remotely operated by a ~..
programmable control system (Figures 10,11). A hand wheel 11 may be used for manual rotation of the drive shaft during setting up. A
brake (not shown) may also be provided. The feed mechanism 12, by which pre-assembled containers are fed to the work station, is driven from a secondary drive shaft 13 which is itself driven in an indexing motion from the shaft 8 via a Geneva mechanism 14. A ram assembly 15, also driven from shaft 8, is operatlve to push the contalner at the work place into and out of engage~ent with a spin-welding head 16.
The spin-welding head is drlven by a servo motor 17 controlled by a switch unit 18 driven off the shaft 8.
The body 1 and ring 3 are pre-assembled before welding and are fed to the machine by a feed mechanism shown in Figure 3. The pre-assembled containers have already been turned on thelr sides before be~ng fed into the machine so they can roll down the infeed chute 19. A gate 20, which is shown only diagrammatically in Figures 2 and 3, stops them before they can reach a transfer turret 21 mounted for intermittent rotation on the secondary drive shaft 13. The gate is timed in sequence with the machine from the switch unit 18 and is operated when the transfer turret has stopped rotating. The gate 20 moves sideways until a container therein is lined up with turret guides. The container is then free to drop under gravity ~nto the transfer turret. The sideways movement of the gate 20 causes it to interfere with the next ~ollowlng container In feed chute 19, preventing it from dropping. After a predetermined period, the gate is returned to its original position, allowing the next container to 8~
drop into the gate. A pneumatic cylinder 200 with a solenoid valve (not shown) is used to operate the gate.
Rotation of the transfer turret 21 carries the containers from the in~eed to the work stat~on W and then to the discharge chute 25. In this example the interrupted motion o~ the trans~er turret is provided by the Geneva mechanism 14. The transfer turret comprises a pair o~
plates 23 mounted on sha~t 13 and having peripheral part-circular cut-outs therein to support the containers during their travel thereon. Outside guides and a rail prevent the containers being disturbed while the turret rotates.
The spin-welding process is carried out at the work station which is shown at W in Figure 3. At the work station, the container is held between the spin welding head shown in Figures 4 and 5~ and the ram assembly 15.
The spin~welding head comprises a low inertia mechanism driven by a DC
low inertia rare earth brushless servo motor 17 as shown in Figure 4.
Drive is taken to the spin welding head shaft 26 via a toothed belt 27. The driven pulley 37 is mounted on one end of the shaft 26 which is horizontal. A disc 28 of lightweight alloy is bolted directly to the opposite end of the shaft 26, Machined in its exposed ~ace, the disc 28 has driving pins 29 wh~ch engage in the ring 3 and cooperate with the external webs 5 thereof to cause the ring to be driven in - ~2~
rotation. In order to keep friction as low as possible the shaft 26 is mounted in two bal1 races 30.
The ram movement, to push a container into the spin welding head, is actuated by a cam 38 (Fiyure 2) driven at the machine cycle speed on the shaft 8. Th1s cam action is transferred to the ram slider by a lever arm 51 pivoted at 52 and a connecting link 50. Dogs 151 located on the front face of the ram engage with the webs 4 to prevent the body 1 ~rom rotating during welding.
When the container formed by the assembled container body 1 and end component 3 is pushed by the ram assembly 15 into engagement with the spin-welding head 16 as shown in Figures 4 and 5, the end face of the end component 3 comes into contact with an ejector ring 46 (Figure 5) which yields axially under the action o~ a plurality of coil springs 47 spaced circumferentially around the ring 46. The ring 46 is held in the position shown in Figure 5 during welding and the correct end pressure for the welding process is provided by the coil springs 47 via the ejector ring.
Radial pressure is applied during the welding process by means of a tourniquet comprising a loop of steel wire cable 39 which is retained in an annular groove 42 in a cable retaining housing 45 mounted on the spin-welding head. When the tourniquet is in a relaxed condition, it forms a loop having a d-iameter slightly greater than that of the container to be welded. When no container is held in posit~on for welding, the ejector ring moves axially under the influence of the springs 47 to close oFf the annular groove 42 and to retain the wire cable 39 therein~ as shown in Figure 4.
As shown in Figure 6, one end of the cable 39 is rigidly anchored at 40 whilst the other end is attached to a pneumatic cylinder 41. A
small release area 43 is cut out of the cable retaining housing 45 to allow the cable to cross over at 44 at the cable's entry and exit points. During the operation of the machine, the assembled container body and end component are fed into the cable retaining housing and through the loop of the cable 39. The driving pins 29 are located as described below and the pneumatic cylinder 41 is operated to apply a tension to the cable such that the cable loop diameter is decreased, thereby producing the desired external pressure on the body 1 necessary for the spin-welding process. After welding, the pneumatic cylinder 41 is returned to its original position, releasing the external pressure and allowing the container to be ejected. As the ram assembly 15 moves back, the ejector ring 46 is free to move forward, thereby pushing the now welded container out of the cable retaining housing and closing the annular groove 42. The manner oF
overlap of the wire cable is shown more clearly in Figure 7.
For any given components to be spin-welded, there will be a preferred or medium interFerence fit which occurs when both components conform s~
exactly to their design dimensions. Due to the var;ations in component size, within normal plastics moulding tolerances, the Interference flt between any two components may differ significantly from the preferred value. A range of interference fits which can lead to successful welds under commercial conditions may be defined as extend~ng from a loose flt having a diametric interference substantially less than the medium fit to a tight flt having a diametric interference substant~ally greater than the medium fit. The specific values of diametric interference for "loose", "medlum" and "tight" fits will, of course, vary according to the nature of the components being welded.
In the case of the components constructed and dimensioned as described in our co-pending Canadian patent application No. 507, 787, the preferred or medium interference fit between the components is about 0.75mm (that is, the internal diameter of the body 1 when relaxed is 0.75mm less than the external diameter of the ring 3 when relaxed).
In this case, a loose fit may have a diametric interference of about 0.25mm and a tight fit may have a diametric interference of about 1.25mm. As a consequence of these variable degrees of fit between end component and s~de wall, the contact pressure between the surfaces to be welded, without appl~cationof add~tional radial pressure, can be calculated to range between 0.02 Newtons/mm2 and 0.17 Newtons/mm2.
.
i;8~
g For one set of welding conditions, for example, derived from experiments using polypropylene rings and bodies, the ideal contact pressure between the surfaces during welding has been found to be about 0.23 Newtons/mm2. It has been shown that for the example quoted, the radlal pressure required to maintain the contact pressure between the welding surfaces at about 0.23 Newtons/mm2 needs to be about 0.25 Newtons/mm2 for the loose fit situation of 0.25mm diametric interference, and about 0.07 Newtons/mm2 for the tight fit situation of 1.25mm diametric interference. Such pressures enable both extremes of fit to be satisfactorily spin-welded to give a fully-fused integral joint in a total time of about 0.21 seconds at lOOOrpm, wherein 0.05 seconds is required to accelerate the end component to the required speed, and 0.08 seconds is required to electromagnetically brake the system to the stat~onary pos;tion. This total time can be reduced by choosing a greater contact presssure or by increasing the motor speed, or both.
In order for the correct radial pressure to be applied by the tourniquet during welding, it is necessary for the interference fit between the conta~ner body and the end component to be measured. Two methods have been shown to be useful and are explained below as examples.
The first is based on the force requlred to fully assemble the end component into the side wall of the container prior to spin-welding.
~26~5~3L
It has been found that a substantially linear relationship exists between the interference fit and maximum force of assembly, during which the side wall is caused to deform in an elastic fashion because of the d~ametric interference between the end component and the side wall, although the general shape of the insertion force profile can be ~nfluenced by the design of the container and the end component. The measurement of the insertion force may be made on a preliminary assembly machine which fits rings 3 to bodies l or at an assembly station that forms an integral part of the spin welding apparatus.
The second method is based on the measurement, on the spin-welding machine itself, of the current required by the spin-welding servo motor to produce a torque sufficient to spin, at a low speed such as 70rpm, the end component within the side wall when fully assembled.
This is a particularly appropriate method since it is convenient to programme the servo motor to spin at such low speed for say O.lO
seconds at the very beginning of the welding cycle to facilitate engagement of the drive webs 5 on the plug by the corresponding drive pins 29 on the spin-welding head before accelerating to the much higher welding speed. The engagement time can be extended for a short period such as O.l second dur~ng which time the torque requ~red for slowly spinning the end component within the side wall can be measured and related to a diametric interference between end component and side wall by means of a prev~ously establ~shed correlation relat~onship.
For the components shown in Figure 1, which relate closely to those descr~bed in Canadian paten-t application No. 507,787, the current required to slow-sp~n the end components within the side wall has been shown to vary in an essentially linear fashion with diametr~c S ~nterference between end component and side wall. This relationship can be made even more pronounced ~f a radial pressure is appl~ed to the side wall during measurement. Thus the degree of fit existing between a container body and an end component therefor to be welded can be measured since different fits will require different currents to driYe the servo motor at the chosen fixed low speed.
A voltage is generated by a servoamplifier which is an analogue of the motor current. This measwred voltage is received in a control system where it is compared with the voltages predetermined to represent various fit types e.g. loose, medium and tight. Each of the various fit types will in pract~ce represent a band of the full range of possible fits extending from~the very .loose fit to the very tight fit. The sensitivity of the system will depend on the number of such bands which are distinguished.
The conkrol system will also identify and lead to the ejection of assembled components whereln the interference f~t is either so loose or so ~ight that a satisfactory weld will not be possible under the prevailing operat~ng conditions.
~6~5~
When the type of fit has been identified by the control system, a signal is sent to the machine's pneumatic system, choosing one of a series of solenoid valves that each have had their pressure pre-set to suit one of the fit types. Therefore, in this way, the correct external pressure can be app1~ed by the pneumatic cyl~nder 41 to the cab1e 39 for any range of fits between the end components and the container bodies. There is, of course, no limit to the fit types whlch may be identified in this way and the system can provide a d~rect correlation between the interference fit of the components and the appropriate corresponding radial pressure to be appliedO
Although a measurement of voltage has been used in this example as a means for comparing the torque applied by the motor to spin the end component relative to the container body against the frictional force of the interference fit, other parameters relating to this torque could be measured as an alternative according, for example, to the type of motor employed. Thus a predetermined constant torque may be applied by the motor and the resulting speed of rotation measured.
The drive of the servo motor is governed by an amplifier which can be controlled through a programmable logic controller to provide the required time velocity profile for the motor during the welding process. Operation of the motor 17 ls timed to the machine cycle from the switch un~t 18. On initiation of the weld process the amplifier is energised and the motor is run at a slow speed for a short time to ~Z~58~
enable the driving pins 29 of disc 28 to engage the external webs 5 of ring 3 and fixed dogs 151 of the ram to engage the webs ~ on the base of the container. After the webs have been engaged, the current required to run the servo-motor at the predetermined slow speed is measured, to classify the interference fit, and the appropriate radial pressure to be applied by the tourniquet is selected. After this the output of the amplifier is ramped such that the motor is rapidly accelerated to its welding process speed and retained at this speed for a period decided by the nature of the particular container type being welded. At the end of the weld time the amplifier is de-energised and the motor is stopped by the friction generated at the weld. Stopping of the motor can also be assisted by braking or by powered ramping down of the speed.
Figure 8 is a graphic representation of the machine cycle over one rotation of the primary shaft 8. Lines AB and HJ represent the movement of the turret through one indexed motion (i.e. 90 of the secondary shaft 13). The curves CD and FG represent the forward and return movements of the ram. As can be seen, there is a slight overlap of the ram motion with the movement of the turret~ In the period defined between points D and F the ram is stationary in its forward pos~tion and during this period the welding takes place.
During the period D to E the motor 17 is driven at slow speed to enable the fixed pins 29 on the spin welding disc 28 to locate on the webs 5 of the ring and the dogs 151 on the ram to locate on the webs ~z~
on the base of the container and to allow the appropriate radial pressure PW to be selected. Between the points E and F the motor 17 is accelerated up to weld speed, retained at weld speed for the required period for welding to occur, and stopped either through fr~ction at the weld or through braking means referred to earlier.
Figure 9 is a diagrammat1c timelt)/velocity(v) curve for the motor 17 during the peri~d between the points D and F. From Figure 9 it will be seen that the motor 17 is stopped before the po;nt F. The period XY during which welding takes place can be altered according to the nature of containers being formed.
The current taken by the motor 17 over the welding period XY may be monitored and compared with a previously established datum. If the load on the motsr applied by the weld is below a predetermined level, a satisfactory weld will not be formed. By monitoring the cur~ent taken by the motor during the weld period, unsatisfactory welds can be identi~ied and the container rejected.
Suitably, the period defined between the points D and F may be of the order of 0.4 seconds.
Whilst a pneumatic cylinder 41 has been described for applying tension to the cable 39 in order to apply an inwardly directed radial pressure to the wall 1 the cylinder 4 may if desired be replaced by a solenoid or a servo motor system connected directly to the cable.
Whilst the cable 39 is able to apply a narrow hoop of radial pressure to the end wall 1 it may be replaced, if desired by a ring of segments each urged against the wall 1 by, for example, pneumatic or hydraulic means.
Figure 10 shows diagrammatically the functional interrelationship between the di~ferent parts of the apparatus, and in particular, the control connections between the spin-welding machine and the programmable logic controller.
Figure 11 is a diagrammatic representation of the system for controlling the application of radial pressure, and shows ~n particular the control connections between the electronic system for measuring the parameter which represents the interference fit, the programmable logic controller and the tourniquet adjusting system which adjusts the radial pressure applied during welding.
The method and apparatus described are particularly suitable for welding container components made from thermo plastics materials such as polyethylene, polypropylene, copolymers thereof, or polyamldes when in a form flexible enough to yield under the imposed inwardly directed radlal force to achieve the Inkerference fit necessary Por spin welding. Whilst the invention has been described in terms oP radially contracting a cylindrical wall against a plug therein, the same controls of inter-component ~nterference may be achieved in principle by spreading the plug against the interior of the cyllndrical wall.
SPIN-WELDING APPARATUS
BACKGROUND TO THE INVENTION
The invention relates to apparatus for spin-welding, which is a known technique for welding together plastics components which are assembled 5 with opposed annular surFaces, in which one of the components ls spun at high speed relative to the other to cause melting and subsequent fusion of the plastics material at the interface of the opposed surfaces.
DESCRIPTION OF THE PRIOR ART
lo In known methods of spin welding the energy for the weld is generally provided by a rotating chuck. In a first type of known method pre-assembled articles to be spin welded are mounted on a chuck which is brought into and out of engagement with a rotating drive motor and are spun thereby for a period sufficient to create a weld. In a 15 second known method one of the components of the article to be welded is rotated at high speed on a chuck and is subsequently brought into engagement with the other component. Drive to the chuck is discontinued, and the two components are welded together as the energy of rotation of the chuck is dissipated as frictional heat at the 20 component interface. In both the prior methods precise contro1 of the duration of the weld process and the amount of frictional heat generated at the weld are difficult to achieve.
SUMMARY OF THE INYENTION
According to the invention there is provided a spin welding apparatus 25 for welding together opposed surfaces of thermoplastics components which are assembled together prior to welding, comprising a spin ,~
~26~
welding head for spinning one of the components relative to the other and a low inertia DC servo motor for driving the spin welding head, wherein the drive of the servo motor is governed by control means to prov:ide initial 810w speed spinning to ensure correct take-up of drive to the components, rapid acceleration to weld process speed, maintenance of process speed for a re~uired period, and final rapid decelera-tionand stopping of the motor.
Another aspect of the invention comprehends spin welding apparatus for welding together opposed surfaces of thermoplastics components which are assembled together prior to welding, comprising a spin welding head for spinning one of the components relative to the other and a low inertia DC servo motor operatively connected to the spin welding head, wherein the d~ive of the servo motor is governed by a programmable logic controller means programmed for consecutively providing initial slow speed spinning to ensure correct take-up of drive to one of the componénts and arrest of the other component, rapid acceleration of the one component to weld process speed, maintenance of process speed for a required period, and final rapid deceleration and stopping of -the motor.
BRIEF DESCRIPTION OF THE DRAWINGS
FIGURE 1 shows a longitudinal section through a cylindrical container body and an end component therefor FIGURE 2 is a side view of a spin-welding machine;
~2~
FIGURE 3 is a diagrammatic sectional view of the machine of Figure 2 taken along line A - A;
FIGURE 4 is a longitudinal sectional view through the spin-welding head of the machine;
FIGURE 5 is an enlarged view of part of -the spin-welding head showing a container body and end component engaged therewith;
FIGURE 6 is a side elevational view of a device for exerting radial compressive pressure which is mounted on the spin-welding head;
FIGURE 7 is a diagrammatic sketch showing the overlap of a wire cable employed in the spin-welding head of the machine as shown with Figure 5;
......
,.. ,;,~ ;
6~L~ 3L
FIGURE 8 is a graph~c representation of the mach~ne cycle;
FIGURE 9 ~s a diagrammat~c time/velocity graph for the spin motor of the machine;
FIGURE lO ~s a block diagram showing the control system for the sp~n-weldlng mach~ne; and FIGURE ll is a block diagram show~ng the control system for the devlce shown ~n F~gure 6.
DETAILED DESCRIPTION OF THE _INVENTION
Referring to Figure l, there ~s shown a conta~ner comprising a moulded 0 plastics cyl~ndrical body l provided with an ~ntegral bottom panel 2 and a plug fit end component in the form o~ a moulded plast~cs r~ng 3 adapted to be assembled into the open end of the body. The bottom panel of the body has a plurality of external webs 4 whlch engage fixed p~ns located on the ram of-the mach~né such that they prevent the body rotat~ng during weld~ng. The r~ng 3 also has a number of external webs 5 which engage one or more drlving p~n~ ln the sp~nn~ng head of the mach~ne and thereby prov~de dr~ve for the sp~n-weld~ng process. Components such as shown ~n F~gure l ~re descr~bed ~n greater deta~l in our co-pend~ng Canadian patent application No.
507,787 filed April 28, 1986.
As shown ~n F~gure 2, the sp~n-weld~ng mach~ne fs supported on a frame 6 and has a maln AC dr~ve motor 7 driv~ng a pr~mary dr~ve shaft 8 through a geared speed reduct~on un~t 9, dr~ve belt 90, and a pneumat~c clutch lO. The clutch ~s remotely operated by a ~..
programmable control system (Figures 10,11). A hand wheel 11 may be used for manual rotation of the drive shaft during setting up. A
brake (not shown) may also be provided. The feed mechanism 12, by which pre-assembled containers are fed to the work station, is driven from a secondary drive shaft 13 which is itself driven in an indexing motion from the shaft 8 via a Geneva mechanism 14. A ram assembly 15, also driven from shaft 8, is operatlve to push the contalner at the work place into and out of engage~ent with a spin-welding head 16.
The spin-welding head is drlven by a servo motor 17 controlled by a switch unit 18 driven off the shaft 8.
The body 1 and ring 3 are pre-assembled before welding and are fed to the machine by a feed mechanism shown in Figure 3. The pre-assembled containers have already been turned on thelr sides before be~ng fed into the machine so they can roll down the infeed chute 19. A gate 20, which is shown only diagrammatically in Figures 2 and 3, stops them before they can reach a transfer turret 21 mounted for intermittent rotation on the secondary drive shaft 13. The gate is timed in sequence with the machine from the switch unit 18 and is operated when the transfer turret has stopped rotating. The gate 20 moves sideways until a container therein is lined up with turret guides. The container is then free to drop under gravity ~nto the transfer turret. The sideways movement of the gate 20 causes it to interfere with the next ~ollowlng container In feed chute 19, preventing it from dropping. After a predetermined period, the gate is returned to its original position, allowing the next container to 8~
drop into the gate. A pneumatic cylinder 200 with a solenoid valve (not shown) is used to operate the gate.
Rotation of the transfer turret 21 carries the containers from the in~eed to the work stat~on W and then to the discharge chute 25. In this example the interrupted motion o~ the trans~er turret is provided by the Geneva mechanism 14. The transfer turret comprises a pair o~
plates 23 mounted on sha~t 13 and having peripheral part-circular cut-outs therein to support the containers during their travel thereon. Outside guides and a rail prevent the containers being disturbed while the turret rotates.
The spin-welding process is carried out at the work station which is shown at W in Figure 3. At the work station, the container is held between the spin welding head shown in Figures 4 and 5~ and the ram assembly 15.
The spin~welding head comprises a low inertia mechanism driven by a DC
low inertia rare earth brushless servo motor 17 as shown in Figure 4.
Drive is taken to the spin welding head shaft 26 via a toothed belt 27. The driven pulley 37 is mounted on one end of the shaft 26 which is horizontal. A disc 28 of lightweight alloy is bolted directly to the opposite end of the shaft 26, Machined in its exposed ~ace, the disc 28 has driving pins 29 wh~ch engage in the ring 3 and cooperate with the external webs 5 thereof to cause the ring to be driven in - ~2~
rotation. In order to keep friction as low as possible the shaft 26 is mounted in two bal1 races 30.
The ram movement, to push a container into the spin welding head, is actuated by a cam 38 (Fiyure 2) driven at the machine cycle speed on the shaft 8. Th1s cam action is transferred to the ram slider by a lever arm 51 pivoted at 52 and a connecting link 50. Dogs 151 located on the front face of the ram engage with the webs 4 to prevent the body 1 ~rom rotating during welding.
When the container formed by the assembled container body 1 and end component 3 is pushed by the ram assembly 15 into engagement with the spin-welding head 16 as shown in Figures 4 and 5, the end face of the end component 3 comes into contact with an ejector ring 46 (Figure 5) which yields axially under the action o~ a plurality of coil springs 47 spaced circumferentially around the ring 46. The ring 46 is held in the position shown in Figure 5 during welding and the correct end pressure for the welding process is provided by the coil springs 47 via the ejector ring.
Radial pressure is applied during the welding process by means of a tourniquet comprising a loop of steel wire cable 39 which is retained in an annular groove 42 in a cable retaining housing 45 mounted on the spin-welding head. When the tourniquet is in a relaxed condition, it forms a loop having a d-iameter slightly greater than that of the container to be welded. When no container is held in posit~on for welding, the ejector ring moves axially under the influence of the springs 47 to close oFf the annular groove 42 and to retain the wire cable 39 therein~ as shown in Figure 4.
As shown in Figure 6, one end of the cable 39 is rigidly anchored at 40 whilst the other end is attached to a pneumatic cylinder 41. A
small release area 43 is cut out of the cable retaining housing 45 to allow the cable to cross over at 44 at the cable's entry and exit points. During the operation of the machine, the assembled container body and end component are fed into the cable retaining housing and through the loop of the cable 39. The driving pins 29 are located as described below and the pneumatic cylinder 41 is operated to apply a tension to the cable such that the cable loop diameter is decreased, thereby producing the desired external pressure on the body 1 necessary for the spin-welding process. After welding, the pneumatic cylinder 41 is returned to its original position, releasing the external pressure and allowing the container to be ejected. As the ram assembly 15 moves back, the ejector ring 46 is free to move forward, thereby pushing the now welded container out of the cable retaining housing and closing the annular groove 42. The manner oF
overlap of the wire cable is shown more clearly in Figure 7.
For any given components to be spin-welded, there will be a preferred or medium interFerence fit which occurs when both components conform s~
exactly to their design dimensions. Due to the var;ations in component size, within normal plastics moulding tolerances, the Interference flt between any two components may differ significantly from the preferred value. A range of interference fits which can lead to successful welds under commercial conditions may be defined as extend~ng from a loose flt having a diametric interference substantially less than the medium fit to a tight flt having a diametric interference substant~ally greater than the medium fit. The specific values of diametric interference for "loose", "medlum" and "tight" fits will, of course, vary according to the nature of the components being welded.
In the case of the components constructed and dimensioned as described in our co-pending Canadian patent application No. 507, 787, the preferred or medium interference fit between the components is about 0.75mm (that is, the internal diameter of the body 1 when relaxed is 0.75mm less than the external diameter of the ring 3 when relaxed).
In this case, a loose fit may have a diametric interference of about 0.25mm and a tight fit may have a diametric interference of about 1.25mm. As a consequence of these variable degrees of fit between end component and s~de wall, the contact pressure between the surfaces to be welded, without appl~cationof add~tional radial pressure, can be calculated to range between 0.02 Newtons/mm2 and 0.17 Newtons/mm2.
.
i;8~
g For one set of welding conditions, for example, derived from experiments using polypropylene rings and bodies, the ideal contact pressure between the surfaces during welding has been found to be about 0.23 Newtons/mm2. It has been shown that for the example quoted, the radlal pressure required to maintain the contact pressure between the welding surfaces at about 0.23 Newtons/mm2 needs to be about 0.25 Newtons/mm2 for the loose fit situation of 0.25mm diametric interference, and about 0.07 Newtons/mm2 for the tight fit situation of 1.25mm diametric interference. Such pressures enable both extremes of fit to be satisfactorily spin-welded to give a fully-fused integral joint in a total time of about 0.21 seconds at lOOOrpm, wherein 0.05 seconds is required to accelerate the end component to the required speed, and 0.08 seconds is required to electromagnetically brake the system to the stat~onary pos;tion. This total time can be reduced by choosing a greater contact presssure or by increasing the motor speed, or both.
In order for the correct radial pressure to be applied by the tourniquet during welding, it is necessary for the interference fit between the conta~ner body and the end component to be measured. Two methods have been shown to be useful and are explained below as examples.
The first is based on the force requlred to fully assemble the end component into the side wall of the container prior to spin-welding.
~26~5~3L
It has been found that a substantially linear relationship exists between the interference fit and maximum force of assembly, during which the side wall is caused to deform in an elastic fashion because of the d~ametric interference between the end component and the side wall, although the general shape of the insertion force profile can be ~nfluenced by the design of the container and the end component. The measurement of the insertion force may be made on a preliminary assembly machine which fits rings 3 to bodies l or at an assembly station that forms an integral part of the spin welding apparatus.
The second method is based on the measurement, on the spin-welding machine itself, of the current required by the spin-welding servo motor to produce a torque sufficient to spin, at a low speed such as 70rpm, the end component within the side wall when fully assembled.
This is a particularly appropriate method since it is convenient to programme the servo motor to spin at such low speed for say O.lO
seconds at the very beginning of the welding cycle to facilitate engagement of the drive webs 5 on the plug by the corresponding drive pins 29 on the spin-welding head before accelerating to the much higher welding speed. The engagement time can be extended for a short period such as O.l second dur~ng which time the torque requ~red for slowly spinning the end component within the side wall can be measured and related to a diametric interference between end component and side wall by means of a prev~ously establ~shed correlation relat~onship.
For the components shown in Figure 1, which relate closely to those descr~bed in Canadian paten-t application No. 507,787, the current required to slow-sp~n the end components within the side wall has been shown to vary in an essentially linear fashion with diametr~c S ~nterference between end component and side wall. This relationship can be made even more pronounced ~f a radial pressure is appl~ed to the side wall during measurement. Thus the degree of fit existing between a container body and an end component therefor to be welded can be measured since different fits will require different currents to driYe the servo motor at the chosen fixed low speed.
A voltage is generated by a servoamplifier which is an analogue of the motor current. This measwred voltage is received in a control system where it is compared with the voltages predetermined to represent various fit types e.g. loose, medium and tight. Each of the various fit types will in pract~ce represent a band of the full range of possible fits extending from~the very .loose fit to the very tight fit. The sensitivity of the system will depend on the number of such bands which are distinguished.
The conkrol system will also identify and lead to the ejection of assembled components whereln the interference f~t is either so loose or so ~ight that a satisfactory weld will not be possible under the prevailing operat~ng conditions.
~6~5~
When the type of fit has been identified by the control system, a signal is sent to the machine's pneumatic system, choosing one of a series of solenoid valves that each have had their pressure pre-set to suit one of the fit types. Therefore, in this way, the correct external pressure can be app1~ed by the pneumatic cyl~nder 41 to the cab1e 39 for any range of fits between the end components and the container bodies. There is, of course, no limit to the fit types whlch may be identified in this way and the system can provide a d~rect correlation between the interference fit of the components and the appropriate corresponding radial pressure to be appliedO
Although a measurement of voltage has been used in this example as a means for comparing the torque applied by the motor to spin the end component relative to the container body against the frictional force of the interference fit, other parameters relating to this torque could be measured as an alternative according, for example, to the type of motor employed. Thus a predetermined constant torque may be applied by the motor and the resulting speed of rotation measured.
The drive of the servo motor is governed by an amplifier which can be controlled through a programmable logic controller to provide the required time velocity profile for the motor during the welding process. Operation of the motor 17 ls timed to the machine cycle from the switch un~t 18. On initiation of the weld process the amplifier is energised and the motor is run at a slow speed for a short time to ~Z~58~
enable the driving pins 29 of disc 28 to engage the external webs 5 of ring 3 and fixed dogs 151 of the ram to engage the webs ~ on the base of the container. After the webs have been engaged, the current required to run the servo-motor at the predetermined slow speed is measured, to classify the interference fit, and the appropriate radial pressure to be applied by the tourniquet is selected. After this the output of the amplifier is ramped such that the motor is rapidly accelerated to its welding process speed and retained at this speed for a period decided by the nature of the particular container type being welded. At the end of the weld time the amplifier is de-energised and the motor is stopped by the friction generated at the weld. Stopping of the motor can also be assisted by braking or by powered ramping down of the speed.
Figure 8 is a graphic representation of the machine cycle over one rotation of the primary shaft 8. Lines AB and HJ represent the movement of the turret through one indexed motion (i.e. 90 of the secondary shaft 13). The curves CD and FG represent the forward and return movements of the ram. As can be seen, there is a slight overlap of the ram motion with the movement of the turret~ In the period defined between points D and F the ram is stationary in its forward pos~tion and during this period the welding takes place.
During the period D to E the motor 17 is driven at slow speed to enable the fixed pins 29 on the spin welding disc 28 to locate on the webs 5 of the ring and the dogs 151 on the ram to locate on the webs ~z~
on the base of the container and to allow the appropriate radial pressure PW to be selected. Between the points E and F the motor 17 is accelerated up to weld speed, retained at weld speed for the required period for welding to occur, and stopped either through fr~ction at the weld or through braking means referred to earlier.
Figure 9 is a diagrammat1c timelt)/velocity(v) curve for the motor 17 during the peri~d between the points D and F. From Figure 9 it will be seen that the motor 17 is stopped before the po;nt F. The period XY during which welding takes place can be altered according to the nature of containers being formed.
The current taken by the motor 17 over the welding period XY may be monitored and compared with a previously established datum. If the load on the motsr applied by the weld is below a predetermined level, a satisfactory weld will not be formed. By monitoring the cur~ent taken by the motor during the weld period, unsatisfactory welds can be identi~ied and the container rejected.
Suitably, the period defined between the points D and F may be of the order of 0.4 seconds.
Whilst a pneumatic cylinder 41 has been described for applying tension to the cable 39 in order to apply an inwardly directed radial pressure to the wall 1 the cylinder 4 may if desired be replaced by a solenoid or a servo motor system connected directly to the cable.
Whilst the cable 39 is able to apply a narrow hoop of radial pressure to the end wall 1 it may be replaced, if desired by a ring of segments each urged against the wall 1 by, for example, pneumatic or hydraulic means.
Figure 10 shows diagrammatically the functional interrelationship between the di~ferent parts of the apparatus, and in particular, the control connections between the spin-welding machine and the programmable logic controller.
Figure 11 is a diagrammatic representation of the system for controlling the application of radial pressure, and shows ~n particular the control connections between the electronic system for measuring the parameter which represents the interference fit, the programmable logic controller and the tourniquet adjusting system which adjusts the radial pressure applied during welding.
The method and apparatus described are particularly suitable for welding container components made from thermo plastics materials such as polyethylene, polypropylene, copolymers thereof, or polyamldes when in a form flexible enough to yield under the imposed inwardly directed radlal force to achieve the Inkerference fit necessary Por spin welding. Whilst the invention has been described in terms oP radially contracting a cylindrical wall against a plug therein, the same controls of inter-component ~nterference may be achieved in principle by spreading the plug against the interior of the cyllndrical wall.
Claims (13)
1. Spin welding apparatus for welding together opposed surfaces of thermoplastics components which are assembled together prior to welding, comprising a spin welding head for spinning one of the components relative to the other and a low inertia DC servo motor for driving the spin welding head, wherein the drive of the servo motor is governed by control means to provide initial slow speed spinning to ensure correct take-up of drive to the components, rapid acceleration to weld process speed, maintenance of process speed for a required period, and final rapid deceleration and stopping of the motor.
2. Apparatus as claimed in Claim 1, comprising pressure means for selectively applying a radial pressure to the components in the region of the opposed surfaces whilst the weld process speed of the servo motor is maintained, wherein the control means includes means for measuring, during initial slow speed spinning, a parameter which is a function of the interference fit between the two components to be welded, for comparing the measured value of the parameter with predetermined values, and for selecting the radial pressure applied by the pressure means.
3. Apparatus as claimed in Claim 2, in which the measured parameter is a voltage generated by a servo amplifier as an analogue of the current taken by the servo motor during initial slow speed spinning.
4. Apparatus as claimed in claim 1 wherein the control means includes a programmable logic controller programmed to govern drive to the servo motor.
5. Apparatus as claimed in claim 4, wherein the programmable logic controller is connected to the servo motor via an amplifier.
6. Apparatus as claimed in claim 5, wherein the programmable logic controller is programmed to de-energise the amplifier at the end of the said required period such that the servo motor is decelerated and stopped by the frictional forces generated at the weld.
7. Apparatus as claimed in claim 1, 4 and 6, further comprising a feed mechanism for successively feeding pre-assembled components to a work station on the apparatus, and a ram assembly for moving components at the work station into engagement with the spin welding head, wherein the feed mechanism and the ram assembly are driven in timed relation from a first motor driven shaft and wherein the drive to the servo motor is timed by a switch unit driven from the first shaft.
8. Spin welding apparatus for welding together opposed surfaces of thermoplastics components which are assembled together prior to welding, comprising a spin welding head for spinning one of the components relative to the other and a low inertia DC servo motor operatively connected to the spin welding head, wherein the drive of the servo motor is governed by a programmable logic controller means programmed for consecutively providing (a) initial slow speed spinning to ensure correct take-up of drive to one of the components and arrest of the other component, (b) rapid acceleration of said one component to weld process speed, (c) maintenance of process speed for a required period, and (d) final rapid deceleration and stopping of the motor.
9. Apparatus as claimed in claim 8, comprising pressure means for selectively applying a radial pressure to the exterior of a first component in the region of the opposed surfaces of said first component and a plug member therein whilst the weld process speed of the servo motor is maintained and control means for measuring, during initial slow speed spinning before radial pressure is applied, a parameter which is a function of the interference fit between the two components to be welded, for comparing the measured value of the parameter with predetermined values, and for selecting the radial pressure to be applied by the pressure means during welding as a result of comparison between the measured value and the predetermined values.
10. Apparatus as claimed in claim 9, in which the measured parameter is a voltage generated by a servo amplifier as an analogue of the current taken by the servo motor during initial slow speed spinning.
11. Apparatus as claimed in claim 8, wherein the progammable logic controller means is connected to the servo motor via an amplifier.
12. Apparatus as claimed in claim 11, wherein the progammable logic controller means is programmed to de-energize the amplifier at the end of the said required period such that the servo motor is decelerated and stopped by the frictional forces generated at the weld.
13. Apparatus as claimed in claim 8, 9 or 11, further comprising a feed mechanism for successively feeding pre-assembled components to a transfer turrent defining a work station on the apparatus between said spin welding head, and a ram assembly for moving components at the work station into engagement with the spin welding head, wherein the feed mechanism and the ram assembly are driven in timed relation from a first shaft driven by a motor and wherein operation of the servo motor is timed by a switch unit driven from the first shaft.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8513240A GB8513240D0 (en) | 1985-05-24 | 1985-05-24 | Spin welding machine |
GB8513240 | 1985-05-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
CA1261581A true CA1261581A (en) | 1989-09-26 |
Family
ID=10579664
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA000509776A Expired CA1255930A (en) | 1985-05-24 | 1986-05-22 | Spin-welding apparatus |
CA000509871A Expired CA1261582A (en) | 1985-05-24 | 1986-05-23 | Method of and apparatus for spin-welding |
CA000509870A Expired CA1261581A (en) | 1985-05-24 | 1986-05-23 | Spin-welding apparatus |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA000509776A Expired CA1255930A (en) | 1985-05-24 | 1986-05-22 | Spin-welding apparatus |
CA000509871A Expired CA1261582A (en) | 1985-05-24 | 1986-05-23 | Method of and apparatus for spin-welding |
Country Status (19)
Country | Link |
---|---|
US (3) | US4743331A (en) |
EP (3) | EP0204448B1 (en) |
JP (3) | JPS61283477A (en) |
AR (1) | AR241876A1 (en) |
AT (3) | ATE48795T1 (en) |
AU (3) | AU582852B2 (en) |
BR (3) | BR8602331A (en) |
CA (3) | CA1255930A (en) |
DE (3) | DE3669128D1 (en) |
ES (3) | ES8704113A1 (en) |
FI (3) | FI83941C (en) |
GB (4) | GB8513240D0 (en) |
GR (3) | GR861339B (en) |
IN (3) | IN167320B (en) |
MY (3) | MY101221A (en) |
NO (3) | NO862067L (en) |
NZ (3) | NZ216199A (en) |
ZA (3) | ZA863591B (en) |
ZW (3) | ZW10686A1 (en) |
Families Citing this family (32)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8513240D0 (en) * | 1985-05-24 | 1985-06-26 | Metal Box Plc | Spin welding machine |
GB2188279B (en) * | 1986-03-26 | 1989-11-29 | Metal Box Plc | Method of making a container |
US4787956A (en) * | 1988-01-19 | 1988-11-29 | General Electric Company | Friction welding apparatus |
US4998663A (en) * | 1989-12-22 | 1991-03-12 | Edison Polymer Innovation Corporation | Friction welding apparatus |
GB2243336A (en) * | 1990-04-24 | 1991-10-30 | Esselte Meto Int Gmbh | Portable printers. |
EP0520737A1 (en) * | 1991-06-28 | 1992-12-30 | Pall Corporation | Filter assembly with a spin welded end cap |
US5188279A (en) * | 1991-08-15 | 1993-02-23 | United Technologies Corporation | Inertia bonding utilizing alternative axial load paths |
JPH0595752U (en) * | 1992-06-01 | 1993-12-27 | カシオ計算機株式会社 | Electronic device with printer |
AU3963493A (en) * | 1993-01-11 | 1994-08-15 | Stricovsky, Leonid Lvovich | Process for radial friction welding of pipeline components made of thermoplastic material |
GB2293790B (en) * | 1994-10-06 | 1998-03-18 | Haldo Dev Ltd | Method of and apparatus for joining plastics components |
AU3968495A (en) * | 1994-10-21 | 1996-05-15 | Pall Corporation | Fluid processing apparatus |
JPH08192006A (en) * | 1995-01-13 | 1996-07-30 | Pall Corp | Filter |
DE19523240C1 (en) * | 1995-06-27 | 1997-03-27 | Kuka Schweissanlagen & Roboter | Method and device for friction welding workpieces |
US6103120A (en) * | 1995-10-23 | 2000-08-15 | Pall Corporation | Fluid processing apparatus |
US5653833A (en) * | 1996-07-25 | 1997-08-05 | Memtec America Corporation | Method for integrally joining preformed thermoplastic core elements especially adapted for the continuous manufacture of melt-blown filter cartridges |
US6170731B1 (en) * | 1996-09-25 | 2001-01-09 | David V. Hofius, Sr. | Method and apparatus for friction torque welding |
US5858142A (en) * | 1997-02-27 | 1999-01-12 | Inertia Friction Welding, Inc. | Angular orientation control system for friction welding |
DE60037669T2 (en) * | 1999-10-04 | 2009-01-08 | Matsushita Electric Industrial Co., Ltd., Kadoma-shi | METHOD AND DEVICE FOR OBTAINING A FRACTORY COMPOUND, AND HOLDING ELEMENT FOR USE WITH THIS DEVICE |
US6364977B1 (en) * | 2000-06-05 | 2002-04-02 | Sonics & Materials Inc. | Tuning mechanism and method for vibration welding |
US6296726B1 (en) * | 2000-06-13 | 2001-10-02 | Silgan Containers Corporation | Method and apparatus for spin welding container closures |
US6364197B1 (en) * | 2000-08-04 | 2002-04-02 | The Boeing Company | Friction stir welding of containers from the interior |
DE10040311A1 (en) * | 2000-08-17 | 2002-03-07 | Braun Gmbh | Friction welding connection for connecting components made of thermoplastic |
CN1258198C (en) * | 2003-07-18 | 2006-05-31 | 杨仕桐 | Facility for producing paster type inductor |
DE102004013836A1 (en) * | 2004-03-16 | 2005-10-06 | Bielomatik Leuze Gmbh + Co.Kg | Method for rotary friction welding of plastic parts and apparatus for carrying out the method |
US20080156847A1 (en) * | 2007-01-03 | 2008-07-03 | Graham Packaging Company, L.P. | Continuous motion spin welding apparatus, system, and method |
CN101678498B (en) * | 2007-03-29 | 2012-05-30 | 川崎重工业株式会社 | Method of joining and joining apparatus |
US8578992B2 (en) * | 2008-02-22 | 2013-11-12 | Kabushiki Kaisha Toyota Jidoshokki | Friction welding apparatus |
US8123713B2 (en) * | 2008-08-12 | 2012-02-28 | Caridian Bct, Inc. | System and method for collecting plasma protein fractions from separated blood components |
US8365404B2 (en) | 2010-11-22 | 2013-02-05 | Andrew Llc | Method for ultrasonic welding a coaxial cable to a coaxial connector |
US8876549B2 (en) | 2010-11-22 | 2014-11-04 | Andrew Llc | Capacitively coupled flat conductor connector |
US8887388B2 (en) | 2010-11-22 | 2014-11-18 | Andrew Llc | Method for interconnecting a coaxial connector with a solid outer conductor coaxial cable |
US9768574B2 (en) | 2010-11-22 | 2017-09-19 | Commscope Technologies Llc | Cylindrical surface spin weld apparatus |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3338775A (en) * | 1964-05-27 | 1967-08-29 | Continental Can Co | Spin welding head |
US3435510A (en) * | 1964-10-27 | 1969-04-01 | Caterpillar Tractor Co | Bonding |
US3499068A (en) * | 1966-04-20 | 1970-03-03 | Brown Machine Co Of Michigan | Methods and apparatus for making containers |
US3595462A (en) * | 1967-08-05 | 1971-07-27 | Toyoda Automatic Loom Works | Device for regulating the operations of the friction welder |
FR1569737A (en) * | 1968-03-08 | 1969-06-06 | ||
FR1569067A (en) * | 1968-04-05 | 1969-05-30 | ||
US3580762A (en) * | 1969-01-23 | 1971-05-25 | King Seeley Thermos Co | Method of making double-walled plastic articles |
US3607581A (en) * | 1969-06-05 | 1971-09-21 | Koehring Co | Spin-welding holder and loading apparatus |
US3690088A (en) * | 1970-09-08 | 1972-09-12 | Dave Chapman | Method of packaging |
US3726748A (en) * | 1971-06-17 | 1973-04-10 | Koehring Co | Trapped cam assembly |
US3888405A (en) * | 1972-09-05 | 1975-06-10 | Production Technology Inc | Quality control apparatus for inertial welding |
US4067490A (en) * | 1974-10-10 | 1978-01-10 | Caterpillar Tractor Co. | Quality control method for inertial welding |
US4090898A (en) * | 1977-03-02 | 1978-05-23 | Celanese Corporation | Methods and apparatus for spin welding thermoplastic workpieces |
SE7808606L (en) * | 1977-08-17 | 1979-02-18 | Johns Manville | MUFFENDE WHEN MUFF COUPLING AND WAY TO PRODUCE THIS |
US4252587A (en) * | 1979-05-29 | 1981-02-24 | Piedmont Wire Corporation | Friction welding machine and method for assembling polystyrene spool |
US4762249A (en) * | 1981-02-13 | 1988-08-09 | Packaging Resources Incorporated | Thermoplastic container end for inertial spinwelding of thermoplastic container ends |
GB2137774B (en) * | 1983-04-07 | 1986-09-24 | Rolls Royce | Automatic control of friction and inertia welding process |
US4552609A (en) * | 1984-09-24 | 1985-11-12 | Homac Mfg. Company | Method and apparatus for friction welding |
GB8510817D0 (en) * | 1985-04-29 | 1985-06-05 | Metal Box Plc | End component for container |
GB8513240D0 (en) * | 1985-05-24 | 1985-06-26 | Metal Box Plc | Spin welding machine |
-
1985
- 1985-05-24 GB GB8513240A patent/GB8513240D0/en active Pending
-
1986
- 1986-05-14 ZA ZA863591A patent/ZA863591B/en unknown
- 1986-05-14 GB GB8611716A patent/GB2175535B/en not_active Expired
- 1986-05-14 DE DE8686303673T patent/DE3669128D1/en not_active Expired - Lifetime
- 1986-05-14 EP EP86303673A patent/EP0204448B1/en not_active Expired - Lifetime
- 1986-05-14 EP EP86303674A patent/EP0202861B1/en not_active Expired
- 1986-05-14 GB GB8611718A patent/GB2175537B/en not_active Expired
- 1986-05-14 ZA ZA863590A patent/ZA863590B/en unknown
- 1986-05-14 GB GB8611717A patent/GB2175536B/en not_active Expired
- 1986-05-14 DE DE8686303674T patent/DE3667631D1/en not_active Expired - Lifetime
- 1986-05-14 AT AT86303674T patent/ATE48795T1/en active
- 1986-05-14 AT AT86303673T patent/ATE50532T1/en not_active IP Right Cessation
- 1986-05-14 DE DE8686303672T patent/DE3669127D1/en not_active Expired - Lifetime
- 1986-05-14 EP EP86303672A patent/EP0203760B1/en not_active Expired - Lifetime
- 1986-05-14 AT AT86303672T patent/ATE50531T1/en not_active IP Right Cessation
- 1986-05-15 IN IN379/MAS/86A patent/IN167320B/en unknown
- 1986-05-15 IN IN378/MAS/86A patent/IN167319B/en unknown
- 1986-05-15 ZA ZA863621A patent/ZA863621B/en unknown
- 1986-05-15 IN IN377/MAS/86A patent/IN167280B/en unknown
- 1986-05-16 NZ NZ216199A patent/NZ216199A/en unknown
- 1986-05-16 NZ NZ216198A patent/NZ216198A/en unknown
- 1986-05-16 US US06/864,143 patent/US4743331A/en not_active Expired - Fee Related
- 1986-05-16 NZ NZ216197A patent/NZ216197A/en unknown
- 1986-05-16 US US06/864,141 patent/US4721546A/en not_active Expired - Fee Related
- 1986-05-16 US US06/864,140 patent/US4741788A/en not_active Expired - Fee Related
- 1986-05-21 AU AU57616/86A patent/AU582852B2/en not_active Ceased
- 1986-05-21 AU AU57617/86A patent/AU581760B2/en not_active Ceased
- 1986-05-21 AU AU57615/86A patent/AU584702B2/en not_active Ceased
- 1986-05-22 BR BR8602331A patent/BR8602331A/en not_active IP Right Cessation
- 1986-05-22 BR BR8602330A patent/BR8602330A/en not_active IP Right Cessation
- 1986-05-22 GR GR861339A patent/GR861339B/en unknown
- 1986-05-22 GR GR861341A patent/GR861341B/en unknown
- 1986-05-22 BR BR8602332A patent/BR8602332A/en not_active IP Right Cessation
- 1986-05-22 CA CA000509776A patent/CA1255930A/en not_active Expired
- 1986-05-22 GR GR861340A patent/GR861340B/en unknown
- 1986-05-23 ES ES555263A patent/ES8704113A1/en not_active Expired
- 1986-05-23 ZW ZW10686A patent/ZW10686A1/en unknown
- 1986-05-23 ES ES555264A patent/ES8703767A1/en not_active Expired
- 1986-05-23 JP JP61119018A patent/JPS61283477A/en active Granted
- 1986-05-23 ZW ZW10486A patent/ZW10486A1/en unknown
- 1986-05-23 FI FI862176A patent/FI83941C/en not_active IP Right Cessation
- 1986-05-23 NO NO862067A patent/NO862067L/en unknown
- 1986-05-23 ZW ZW10586A patent/ZW10586A1/en unknown
- 1986-05-23 JP JP61119019A patent/JPS61283478A/en active Granted
- 1986-05-23 CA CA000509871A patent/CA1261582A/en not_active Expired
- 1986-05-23 FI FI862175A patent/FI83940C/en not_active IP Right Cessation
- 1986-05-23 AR AR30406886A patent/AR241876A1/en active
- 1986-05-23 ES ES555265A patent/ES8703768A1/en not_active Expired
- 1986-05-23 JP JP61119020A patent/JPS61283479A/en active Granted
- 1986-05-23 NO NO862068A patent/NO862068L/en unknown
- 1986-05-23 CA CA000509870A patent/CA1261581A/en not_active Expired
- 1986-05-23 NO NO862066A patent/NO862066L/en unknown
- 1986-05-23 FI FI862177A patent/FI83942C/en not_active IP Right Cessation
-
1987
- 1987-05-15 MY MYPI87000665A patent/MY101221A/en unknown
- 1987-05-15 MY MYPI87000664A patent/MY101220A/en unknown
- 1987-05-15 MY MYPI87000663A patent/MY101219A/en unknown
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