DE3638828A1 - Process for producing a leaktight, elastic and bubble-shaped separating wall - Google Patents
Process for producing a leaktight, elastic and bubble-shaped separating wallInfo
- Publication number
- DE3638828A1 DE3638828A1 DE19863638828 DE3638828A DE3638828A1 DE 3638828 A1 DE3638828 A1 DE 3638828A1 DE 19863638828 DE19863638828 DE 19863638828 DE 3638828 A DE3638828 A DE 3638828A DE 3638828 A1 DE3638828 A1 DE 3638828A1
- Authority
- DE
- Germany
- Prior art keywords
- elastic
- layers
- separating wall
- bubble
- producing
- 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.)
- Withdrawn
Links
Classifications
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/22—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor using multilayered preforms or parisons
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
- B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
- B29C48/335—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles
- B29C48/336—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles the components merging one by one down streams in the die
Abstract
Description
Die Erfindung geht aus von einem Verfahren zum Herstellen einer dichten, elastischen und vorzugsweise blasenförmigen Trennwand. Der artige elastische Trennwände, die insbesondere in Druckspeichern Verwendung finden, wo sie ein kompressibles Medium (Gas) von einer Druckflüssigkeit trennen, sind mittels eines einvulkanisierten Gas ventilkörpers im Druckbehälter befestigt. Sie werden je nach Größe aus zwei oder noch mehr gummielastischen Teilen hergestellt. Einer der Teile trägt den Ventilkörper, der entweder eingeklebt oder ein vulkanisiert ist. Das Zusammenfügen der in separaten Arbeitsgängen und Werkzeugen hersgestellten gummielastischen Teile erfolgt durch Kleben. Dies ist aufwendig, da die Klebestellen zuvor keilförmig an geschliffen werden müssen, das Klebemittel aufgetragen werden muß und die Teile dann zusammengefügt und ausgehärtet werden müssen. Hierzu sind spezielle Werkzeuge notwendig.The invention is based on a method for producing a dense, elastic and preferably bubble-shaped partition. The like elastic partition walls, especially in pressure accumulators Find where they use a compressible medium (gas) from a Separate hydraulic fluid are by means of a vulcanized gas valve body attached in the pressure vessel. They will vary in size made of two or more rubber-elastic parts. One The parts carry the valve body, which is either glued or one is vulcanized. Merging the in separate operations and tools made of rubber-elastic parts is made by Glue. This is expensive because the gluing points are previously wedge-shaped must be sanded, the adhesive must be applied and the parts must then be assembled and cured. Special tools are required for this.
Das erfindungsgemäße Verfahren zum Herstellen von elastischen Trenn wänden hat demgegenüber den Vorteil, daß es sehr einfach und kosten günstig ist, daß die Angüsse wiederverwendbar sind, die Abfallkosten gering sind und die Verweilzeit in der Herstellungsform kurz ist. Das erfindungsgemäße Verfahren hat darüber hinaus den besonderen Vorteil, daß die Blasen mehrschichtig praktisch in einem Arbeitsgang herstellbar sind. Notwendige Nacharbeiten sind vernachlässigbar.The inventive method for producing elastic separation walls has the advantage that it is very simple and cost it is favorable that the sprues are reusable, the waste costs are short and the dwell time in the production mold is short. The method according to the invention also has a special one Advantage that the bubbles multi-layer practically in one operation are producible. Any necessary rework is negligible.
Weitere Vorteile des erfindungsgemäßen Verfahrens ergeben sich aus den Unteransprüchen.Further advantages of the method according to the invention result from the subclaims.
Ein Ausführungsbeispiel der Erfindung ist in der nachfolgenden Be schreibung und Zeichnung erläutert. Die Zeichnung zeigt in den Fi guren 1 und 2 zwei verschiedene Herstellungsverfahren für blasen förmige Trennwände in vereinfachter bzw. schematischer Darstellung, in Fig. 2 einen Schnitt durch eine Hohlkörper-Blasform in prin zipieller Darstellung.An embodiment of the invention is explained in the description and drawing below. The drawing shows in Figures 1 and 2 two different manufacturing processes for bubble-shaped partitions in a simplified or schematic representation, in Fig. 2 a section through a hollow blow mold in principle representation.
In Fig. 1 ist mit 10 im prinzipiellen Aufbau eine Hohlkörper-Blas form bezeichnet, in welcher eine mehrschichtige elastische Blase hergestellt wird. In der Blasform sind Kühlkanäle 11, 12, 13 und 14 ausgebildet, mit 15 ist der Vorformling bezeichnet, auf welchen in den Fig. 2 und 3 näher eingegangen ist. Der Vorformling - er ist in Fig. 2 mit 15 A, in Fig. 3 mit 15 B bezeichnet - ist mehr schichtig aufgebaut. Im Ausführungsbeispiel nach Fig. 2 besteht er aus einer äußeren Trägerschicht 16, die durch einen Satellitenex truder 17 in die Blasform 10 eingebracht wird. Innerhalb der Träger schicht wird über einen Satellitenextruder 18 ein Haftvermittler 19 - z. B. Gummi - oder Harz-Gummi-Lösung oder auch ein anderes poly mersystem - eingebracht und über den Hauptextruder 20 eine Barriere schicht 21, also die Schicht, welche die geringste Gasundurchlässig keit aufweist. Bei diesem Ausführungsbeispiel liegt die Barriere schicht 21 auf der Seite, auf der sich das Druckgas befindet, während die Trägerschicht 16 auf der Flüssigkeitsseite liegt. Die verschiedenen Schichten werden im sogenannen Koextrusionsverfahren hergestellt, also einem Verfahren, in dem alle Schichten gleich zeitig hergestellt werden. Der Werkstoff der Trennwand ist ein Ver bundwerkstoff, wobei die Trägerschicht 16 aus einem thermo plastischen Elastomer oder thermoplastischem Polyurethan besteht. Als Barriereschicht 21 eignet sich ein thermoplastischer Werkstoff mit hoher Gasundurchlässigkeit, z. B. PA, PVAL, EVAL.In Fig. 1, 10 in the basic structure designates a hollow body blow mold, in which a multilayer elastic bladder is produced. Cooling channels 11 , 12 , 13 and 14 are formed in the blow mold, 15 denotes the preform, which has been discussed in more detail in FIGS. 2 and 3. The preform - it is indicated in Fig 2 with 15 A, 15 B in Fig 3 -.. Is rebuilt seriate. In the embodiment shown in FIG. 2, it consists of an outer carrier layer 16 , which is introduced into the blow mold 10 by a satellite extruder 17 . An adhesion promoter is in layers within the carrier through a satellite extruder 18 19 - z. B. rubber - or resin-rubber solution or another polymer system - introduced and over the main extruder 20 a barrier layer 21 , that is the layer which has the lowest gas impermeability. In this exemplary embodiment, the barrier layer 21 lies on the side on which the compressed gas is located, while the carrier layer 16 lies on the liquid side. The various layers are produced using the so-called coextrusion process, i.e. a process in which all layers are produced at the same time. The material of the partition is a composite material, wherein the carrier layer 16 consists of a thermoplastic elastomer or thermoplastic polyurethane. When barrier layer 21 is a thermoplastic material with high gas barrier property is suitable, for. B. PA, PVAL, EVAL.
Beim Ausführungsbeispiel nach Fig. 3 liegt die Trägerschicht 16 innen, d. h. auf der Gasseite. Durch den Satellitenextruder 18 wird wiederum der Haftvermittler 19 eingebracht, durch den Satelliten extruder 17 die Barriereschicht 21 und durch einen zweiten Haupt extruder 22 noch eine zweite, außenliegende Trägerschicht 23 oder ein Regenerat. Daraus ist zu erkennen, daß bei diesem Vorformling eine innere und eine äußere Trägerschicht vorhanden sind.In the embodiment according to FIG. 3, the support layer 16 is inside, ie, on the gas side. The adhesion promoter 19 is in turn introduced by the satellite extruder 18 , the barrier layer 21 by the satellite extruder 17 and a second, outer carrier layer 23 or a regrind by a second main extruder 22 . From this it can be seen that an inner and an outer carrier layer are present in this preform.
Der Vorformling 15 in Fig. 1 wird als Polymerschlauch extrudiert. Er kann zusätzlich in einer Temperierstation außen und innen erwärmt werden. Durch eine gleichmäßige Wärmeverteilung werden optimale Wanddicken erreicht. Außerdem wird der Vorformling in der Blasform 10 am unteren Ende 24 mittels einer Quetschkante verschweißt und zu den Wänden der Form hin aufgeblasen. Nach dem Entformen, Entgraten und Abquetschen des Bodenbutzens 25 und des Halsbutzens 26 wird das Gasventil zum Füllen der Blase am Hals 27 montiert, wobei eine hohe Dichtheit erreicht wird.The preform 15 in Fig. 1 is extruded as a polymer tube. It can also be heated inside and outside in a temperature control station. Optimal wall thicknesses are achieved through uniform heat distribution. In addition, the preform in the blow mold 10 is welded at the lower end 24 by means of a crimped edge and inflated towards the walls of the mold. After demolding, deburring and squeezing the bottom piece 25 and the neck piece 26 , the gas valve for filling the bladder is mounted on the neck 27 , a high degree of tightness being achieved.
Die Herstellung der blasenförmigen Trennwand durch das erfindungs gemäße Verfahren ist sehr kostengünstig. Die Verweilzeiten im Werk zeug sind kurz, die Angüsse sind wiederverwendbar und die Abfall kosten gering.The manufacture of the bubble-shaped partition by the Invention The procedure is very inexpensive. The dwell times in the plant tools are short, the sprues are reusable and the waste cost low.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19863638828 DE3638828A1 (en) | 1986-11-13 | 1986-11-13 | Process for producing a leaktight, elastic and bubble-shaped separating wall |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19863638828 DE3638828A1 (en) | 1986-11-13 | 1986-11-13 | Process for producing a leaktight, elastic and bubble-shaped separating wall |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3638828A1 true DE3638828A1 (en) | 1988-05-19 |
Family
ID=6313896
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19863638828 Withdrawn DE3638828A1 (en) | 1986-11-13 | 1986-11-13 | Process for producing a leaktight, elastic and bubble-shaped separating wall |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3638828A1 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2733296A1 (en) * | 1995-04-19 | 1996-10-25 | Sardou Max | Multilayer thermoplastic gas tank |
US6482348B1 (en) | 1991-04-26 | 2002-11-19 | Boston Scientific Corporation | Method of forming a co-extruded balloon for medical purposes |
DE102004031337B4 (en) * | 2004-06-29 | 2007-08-30 | Contitech Elastomer-Beschichtungen Gmbh | Molded membrane and process for its production |
US7713047B2 (en) | 2003-01-27 | 2010-05-11 | Boston Scientific Scimed, Inc. | Extrusion apparatus for making multilayer articles |
US7781038B2 (en) | 1993-10-01 | 2010-08-24 | Boston Scientific Scimed, Inc. | Medical device balloons containing thermoplastic elastomers |
DE102009003696A1 (en) | 2009-03-30 | 2010-10-07 | Contitech Elastomer-Beschichtungen Gmbh | Membrane, in particular gas storage membrane |
US7947059B2 (en) | 2000-03-02 | 2011-05-24 | Boston Scientific Scimed, Inc. | Multilayer medical device |
-
1986
- 1986-11-13 DE DE19863638828 patent/DE3638828A1/en not_active Withdrawn
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6482348B1 (en) | 1991-04-26 | 2002-11-19 | Boston Scientific Corporation | Method of forming a co-extruded balloon for medical purposes |
US7781038B2 (en) | 1993-10-01 | 2010-08-24 | Boston Scientific Scimed, Inc. | Medical device balloons containing thermoplastic elastomers |
FR2733296A1 (en) * | 1995-04-19 | 1996-10-25 | Sardou Max | Multilayer thermoplastic gas tank |
US7947059B2 (en) | 2000-03-02 | 2011-05-24 | Boston Scientific Scimed, Inc. | Multilayer medical device |
US7713047B2 (en) | 2003-01-27 | 2010-05-11 | Boston Scientific Scimed, Inc. | Extrusion apparatus for making multilayer articles |
US8231374B2 (en) | 2003-01-27 | 2012-07-31 | Boston Scientific Scimed, Inc. | Extrusion apparatus for making multilayer articles |
DE102004031337B4 (en) * | 2004-06-29 | 2007-08-30 | Contitech Elastomer-Beschichtungen Gmbh | Molded membrane and process for its production |
DE102009003696A1 (en) | 2009-03-30 | 2010-10-07 | Contitech Elastomer-Beschichtungen Gmbh | Membrane, in particular gas storage membrane |
WO2010112249A1 (en) | 2009-03-30 | 2010-10-07 | Contitech Elastomer-Beschichtungen Gmbh | Membrane, in particular a gas storage membrane |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8139 | Disposal/non-payment of the annual fee |