DE102011084741B4 - Proximity switch with metallic outer shell - Google Patents
Proximity switch with metallic outer shell Download PDFInfo
- Publication number
- DE102011084741B4 DE102011084741B4 DE201110084741 DE102011084741A DE102011084741B4 DE 102011084741 B4 DE102011084741 B4 DE 102011084741B4 DE 201110084741 DE201110084741 DE 201110084741 DE 102011084741 A DE102011084741 A DE 102011084741A DE 102011084741 B4 DE102011084741 B4 DE 102011084741B4
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- DE
- Germany
- Prior art keywords
- outer shell
- metallic outer
- insulating body
- housing
- metallic
- 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.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
- G01D11/24—Housings ; Casings for instruments
- G01D11/245—Housings for sensors
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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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/1418—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure
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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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14598—Coating tubular articles
- B29C45/14622—Lining the inner or outer surface of tubular articles
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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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14639—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles for obtaining an insulating effect, e.g. for electrical components
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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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14778—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the article consisting of a material with particular properties, e.g. porous, brittle
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/2618—Moulds having screw-threaded mould walls
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/44—Removing or ejecting moulded articles for undercut articles
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Manufacture Of Switches (AREA)
Abstract
Verfahren zur Herstellung eines Gehäuses für einen Näherungsschalter mit einer metallischen Außenhülle (1) und einem innen liegenden Isolationskörper (2), wobei die metallische Außenhülle (1) Hinterschnitte (3) aufweist, die vom Isolationskörper (2) formschlüssig ausgefüllt werden, wobei der Isolationskörper (2) als Hochdruck-Spritzgussteil ausgeführt ist, gekennzeichnet durch folgende Verfahrensschritte: – Einlegen eines vorgeformten Metallteils, vorzugsweise einer Rundhülse in ein Spritzwerkzeug, in dem sowohl die gewünschte äußere Form der metallischen Außenhülle (1) als auch die Form des Isolationskörpers (2) vorgegeben sind, – Schließen des Werkzeugs, – Einspritzen von Kunststoff mit einem Druck, der geeignet ist, das Metallteil zur gewünschten metallischen Außenhülle (1) mit dabei entstehenden Hinterschnitten (3) umzuformen, – Öffnen des Werkzeugs nach einer prozess- und werkstoffabhängigen Abkühlzeit, – Entnahme des nunmehr eine metallische Außenhülle (1) und einen Isolationsköper (2) aufweisenden metallischen Gehäuses.A method for producing a housing for a proximity switch with a metallic outer shell (1) and an inner insulating body (2), wherein the metallic outer shell (1) has undercuts (3) which are positively filled by the insulating body (2), wherein the insulating body (2) is designed as a high-pressure injection-molded part, characterized by the following method steps: Inserting a preformed metal part, preferably a round sleeve in an injection mold, in which both the desired outer shape of the metallic outer shell (1) and the shape of the insulating body (2) are predetermined, -. Close the tool, – Injecting plastic at a pressure capable of reshaping the metal part into the desired metallic outer shell (1) with undercuts (3) resulting therefrom; Opening the tool after a process and material dependent cooling time; Removing the now a metallic outer shell (1) and an insulating body (2) having metallic housing.
Description
Die Erfindung betrifft einen Näherungsschalter mit metallischer Außenhülle gemäß den Merkmalen des Oberbegriffs des Patentanspruchs 1. Es wird ein Verfahren zur Herstellung eines Gehäuses für einen Näherungsschalter beansprucht.The invention relates to a proximity switch with metallic outer shell according to the features of the preamble of
Näherungsschalter sind in der Automatisierungstechnik weit verbreitet. Sie werden unter anderem auch von der Anmelderin in großen Stückzahlen als induktive, kapazitive oder optische Näherungsschalter hergestellt und vertrieben.Proximity switches are widely used in automation technology. Among other things, they are manufactured and distributed by the applicant in large numbers as inductive, capacitive or optical proximity switches.
Für raue Umgebungsbedingungen sind Metallgehäuse besonders geeignet. Allerdings müssen sowohl Sensorfenster als auch Durchführungen für elektrische Anschlüsse aus nichtmetallischen Materialien, vorzugsweise Kunststoff, vorgesehen werden. Außerdem ist das Gehäuse gegenüber den innen liegenden Elektronikbaugruppen elektrisch zu isolieren. Hierbei geht es nicht nur um den störungsfreien Betrieb, sondern auch um Sicherheitsbestimmungen bezüglich Durchschlagsfestigkeit und Kriechstrecken. Zu diesem Zweck werden häufig Formteile aus Kunststoff eingelegt bzw. eingegossen. Nachteilig bei der Verwendung eines Einlegeteils sind der Montageaufwand und dessen Befestigung durch Verklebung oder Verguss.For harsh environments metal housings are particularly suitable. However, both sensor windows and feedthroughs for electrical connections made of non-metallic materials, preferably plastic, must be provided. In addition, the housing must be electrically insulated from the internal electronics modules. This is not only about trouble-free operation, but also about safety regulations regarding dielectric strength and creepage distances. For this purpose, molded plastic parts are often inserted or cast. A disadvantage of the use of an insert are the assembly costs and its attachment by gluing or potting.
Eine häufig verwendete Gehäusebauform ist das Zylindergehäuse. Daneben sind quaderförmige Gehäuse gebräuchlich, die in manchen Fällen mit Gewindestutzen zur Befestigung versehen werden. Zylindrische Metallgehäuse werden meist mit einem Außengewinde versehen. Das geschieht oftmals durch Innenhochdruckumformung (Hydroforming). Hierbei wird ein metallisches Werkstück, beispielsweise ein Rohr oder eine Hülse, mittels Innendruck durch eine Wasser-Öl-Emulsion mit Drücken bis zu 3000 bar verformt.A frequently used housing design is the cylinder housing. In addition, cuboid housings are common, which are provided in some cases with threaded connector for attachment. Cylindrical metal housings are usually provided with an external thread. This is often done by hydroforming. In this case, a metallic workpiece, for example a pipe or a sleeve, by means of internal pressure by a water-oil emulsion with pressures up to 3000 bar deformed.
Aus der
Die Herstellung erfolgt in einem kombinierten Innenhochdruckumformungsprozess. Hierbei wird in einem ersten Schritt das vorgeformte Metallteil hydro-ausgeformt und in einem zweiten Schritt ein Kunststoffteil angespritzt. Nach dem Ausformen des vorgeformten Metallteils wird das Formwerkzeug derart bewegt, dass das hydro-ausgeformte Metallteil in einer zweiten Kavität für Spritzgießen positioniert wird. Durch in die zweite Kavität eingespritztes Kunststoffmaterial wird das Hybridbauteil erzeugt, während gleichzeitig in der ersten Kavität des Formwerkzeuges ein mit Druckmedium befülltes, vorgeformtes Metallteil in seiner Kontur hydro-ausgeformt wird. Als nachteilig wird die Notwendigkeit mehrerer Verfahrensschritte angesehen.The production takes place in a combined hydroforming process. Here, in a first step, the preformed metal part is hydro-molded and molded in a second step, a plastic part. After forming the preformed metal part, the mold is moved such that the hydro-molded metal part is positioned in a second cavity for injection molding. By injected into the second cavity plastic material, the hybrid component is generated, while at the same time in the first cavity of the mold a filled with pressure medium, preformed metal part is hydro-formed in its contour. A disadvantage is considered the need for several process steps.
Die Druckschriften
Aufgabe der Erfindung ist es, ein für hinterschnittene Hybridbauteile, insbesondere auch zur Herstellung von Gehäusen für Näherungsschalter geeignetes Verfahren mit geringerem Fertigungsaufwand anzugeben. Weiterhin soll ein Näherungsschalter angegeben werden, dessen Gehäuse kostengünstig und mit geringem Montageaufwand herstellbar ist.The object of the invention is to provide a method for undercut hybrid components, in particular also for the production of housings for proximity switches suitable method with less manufacturing effort. Furthermore, a proximity switch should be specified, the housing is inexpensive and can be produced with little installation effort.
Diese Aufgabe wird entsprechend den Merkmalen des Patentanspruchs 1 gelöst. Die Unteransprüche betreffen die vorteilhafte Ausgestaltung der Erfindung.This object is achieved according to the features of
Die wesentliche Idee der Erfindung besteht darin, die Ausformung des vorgeformten Metallgehäuses für den Näherungsschalter mit der Herstellung des Isolationskörpers aus Kunststoff zu verbinden.The essential idea of the invention is to connect the shape of the preformed metal housing for the proximity switch with the production of the insulating body made of plastic.
Dazu wird das vorgeformte Metallgehäuse, vorzugsweise ein Rohr oder eine Hülse, in einem Schritt durch die unter Hochruck eingespritzte Kunststoffmasse ausgeformt.For this purpose, the preformed metal housing, preferably a tube or a sleeve, is formed in one step by the injected under high pressure plastic mass.
Die Innenkontur des Kunststoffteils wird durch einen düsenseitigen Kern bestimmt. So entsteht ein innen mit Kunststoff ausgekleidetes Gewinderohr oder eine Gewindehülse, die je nach Bedarf innen mit Konturen zur Aufnahme einer Leiterplatte, Sensorelementen und/oder Bedienelementen versehen werden können.The inner contour of the plastic part is determined by a nozzle-side core. The result is an internally plastic-lined threaded tube or a threaded sleeve, which can be provided inside with contours for receiving a printed circuit board, sensor elements and / or controls as needed.
So wird nicht nur ein Arbeitsgang bei der Herstellung eingespart, sondern auch noch der Montageaufwand verringert. Eine weitere Befestigung des Kunststoffteils entfällt, da es formschlüssig fest mit dem Metallgehäuse verbunden ist.This not only saves one step in the production, but also reduces the assembly effort. A further attachment of the plastic part is eliminated because it is positively connected firmly with the metal housing.
Ein weiterer Erfindungsgedanke besteht darin, ein komplettes Optikmodul mit in das isolierende Kunststoffteil mit einzuspritzen. So muss nur noch eine Frontlinse oder Scheibe montiert, eine Leiterplatte mit den optoelektronischen Bauelementen eingeschoben und das Gehäuse mit einem rückseitigen die elektrischen Kontakte enthaltenden Deckel verschlossen werden.Another idea of the invention is to inject a complete optical module with in the insulating plastic part with. So only a front lens or disc has to be mounted, a printed circuit board with the optoelectronic components inserted and the housing are closed with a back cover containing the electrical contacts.
Nachfolgend ist die Erfindung anhand des in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert.The invention is explained in more detail with reference to the embodiment shown in the drawing.
Die
Die
Auch hier wird der Deckel
Die
Die
Das Hochdruck-Spritzguss-Umformungsverfahren zur Herstellung eines Gehäuses für den erfindungsgemäßen Näherungsschalters umfasst im Wesentlichen folgende Verfahrensschritte:
Zunächst wird ein vorgeformtes Metallteil in das Spritzwerkzeug eingelegt. In vielen Fällen handelt es sich um ein Rohr oder eine Rundhülse. In Abhängigkeit von der gewünschten Endform wird kann aber jede geeignete vorzugsweise im Tiefziehverfahren hergestellte Grundform verwendet werden. Das Werkzeug weist sowohl das Negativ der gewünschten äußeren Form der metallischen Außenhülle
First, a preformed metal part is inserted into the injection mold. In many cases it is a tube or a round sleeve. Depending on the desired final form, however, any suitable, preferably deep-drawing, basic form may be used. The tool has both the negative of the desired outer shape of the metallic
Der beim Abkühlen der Kunststoffmasse entstehende Isolationskörper
Der erfindungsgemäße Näherungsschalter, wobei unter Näherungsschalter jede Art von Positionssensor bzw. Messwertaufnehmer, insbesondere auch solche mit Analogausgang verstanden werden sollen, weist ein Gehäuse mit einer metallischen Außenhülle
In einer weiteren Ausgestaltung bilden die Hinterschnitte
In einer besonders vorteilhaften Ausgestaltung wird ein Optikmodul so in den Isolationskörper
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 11
- Metallische AußenhülleMetallic outer shell
- 22
- Isolationskörperinsulation body
- 33
- Hinterschnittundercut
- 44
- Deckelcover
- 55
- Düsenseitiger KernNozzle side core
- 66
- Schieber (formen das Gewinde)Slide (form the thread)
- 77
- Sensorspulesensor coil
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE201110084741 DE102011084741B4 (en) | 2011-10-19 | 2011-10-19 | Proximity switch with metallic outer shell |
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DE201110084741 DE102011084741B4 (en) | 2011-10-19 | 2011-10-19 | Proximity switch with metallic outer shell |
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DE102011084741A1 DE102011084741A1 (en) | 2013-04-25 |
DE102011084741B4 true DE102011084741B4 (en) | 2013-11-07 |
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DE201110084741 Active DE102011084741B4 (en) | 2011-10-19 | 2011-10-19 | Proximity switch with metallic outer shell |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3943271A1 (en) * | 2020-07-23 | 2022-01-26 | MD Elektronik GmbH | Method of making an electrical connector for a multicore electrical cable |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012218929A1 (en) * | 2012-10-17 | 2014-04-17 | Robert Bosch Gmbh | sensor device |
DE102013218659A1 (en) * | 2013-09-18 | 2015-03-19 | Fränkische Industrial Pipes GmbH & Co. KG | Sensor system for an energy unit |
DE102014205307A1 (en) * | 2014-03-21 | 2015-09-24 | Continental Automotive Gmbh | Rod-shaped magnetic field sensor |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3123594A1 (en) * | 1981-06-13 | 1983-01-05 | Gebhard Balluff, Fabrik Feinmechanischer Erzeugnisse, 7303 Neuhausen | Proximity switch |
US4419646A (en) * | 1979-12-22 | 1983-12-06 | Eduard Hermle | Electric proximity sensor |
US5449017A (en) * | 1993-02-19 | 1995-09-12 | Fluoroware, Inc. | Proximity sensing probe |
DE10326768A1 (en) * | 2002-06-28 | 2004-01-22 | Basf Ag | Combined internal high pressure forming and injection molding process for production of hybrid metal and plastic components involves hydroforming a sealed, fluid filled preform followed by plastic injection |
WO2007131373A1 (en) * | 2006-05-12 | 2007-11-22 | Baumer Electric Ag | Inductive sensor and sealing cap for an inductive sensor |
WO2007131374A1 (en) * | 2006-05-12 | 2007-11-22 | Baumer Electric Ag | Proximity switch and method for contacting a sensor pcb |
WO2007131372A2 (en) * | 2006-05-12 | 2007-11-22 | Baumer Electric Ag | Sensor housing |
-
2011
- 2011-10-19 DE DE201110084741 patent/DE102011084741B4/en active Active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4419646A (en) * | 1979-12-22 | 1983-12-06 | Eduard Hermle | Electric proximity sensor |
DE3123594A1 (en) * | 1981-06-13 | 1983-01-05 | Gebhard Balluff, Fabrik Feinmechanischer Erzeugnisse, 7303 Neuhausen | Proximity switch |
US5449017A (en) * | 1993-02-19 | 1995-09-12 | Fluoroware, Inc. | Proximity sensing probe |
DE10326768A1 (en) * | 2002-06-28 | 2004-01-22 | Basf Ag | Combined internal high pressure forming and injection molding process for production of hybrid metal and plastic components involves hydroforming a sealed, fluid filled preform followed by plastic injection |
WO2007131373A1 (en) * | 2006-05-12 | 2007-11-22 | Baumer Electric Ag | Inductive sensor and sealing cap for an inductive sensor |
WO2007131374A1 (en) * | 2006-05-12 | 2007-11-22 | Baumer Electric Ag | Proximity switch and method for contacting a sensor pcb |
WO2007131372A2 (en) * | 2006-05-12 | 2007-11-22 | Baumer Electric Ag | Sensor housing |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3943271A1 (en) * | 2020-07-23 | 2022-01-26 | MD Elektronik GmbH | Method of making an electrical connector for a multicore electrical cable |
US11901687B2 (en) | 2020-07-23 | 2024-02-13 | Md Elektronik Gmbh | Method for manufacturing an electrical connector for a multi-wire electrical cable |
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DE102011084741A1 (en) | 2013-04-25 |
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