DE2312298A1 - Tool for coating or embedding metal components - esp. contact springs for relay spring assemblies - Google Patents

Tool for coating or embedding metal components - esp. contact springs for relay spring assemblies

Info

Publication number
DE2312298A1
DE2312298A1 DE19732312298 DE2312298A DE2312298A1 DE 2312298 A1 DE2312298 A1 DE 2312298A1 DE 19732312298 DE19732312298 DE 19732312298 DE 2312298 A DE2312298 A DE 2312298A DE 2312298 A1 DE2312298 A1 DE 2312298A1
Authority
DE
Germany
Prior art keywords
tool
coating
contact springs
metal components
esp
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.)
Pending
Application number
DE19732312298
Other languages
German (de)
Inventor
Alois Schober
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alois Zettler Elektrotechnische Fabrik GmbH
Original Assignee
Alois Zettler Elektrotechnische Fabrik GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Alois Zettler Elektrotechnische Fabrik GmbH filed Critical Alois Zettler Elektrotechnische Fabrik GmbH
Priority to DE19732312298 priority Critical patent/DE2312298A1/en
Publication of DE2312298A1 publication Critical patent/DE2312298A1/en
Pending legal-status Critical Current

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
    • 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
    • B29C45/14065—Positioning or centering articles in the mould
    • 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
    • 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
    • B29C45/37—Mould cavity walls, i.e. the inner surface forming the mould cavity, e.g. linings
    • 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
    • B29C45/14065—Positioning or centering articles in the mould
    • B29C2045/14098—Positioning or centering articles in the mould fixing or clamping inserts having variable dimensions

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

Tool for coating or embedding metal components is characterised in that those surfaces of the tool surrounding during injection or press-moulding the metal components which it is intended to embed, are provided with a coating of heat-resistant yet elastic plastic (e.g. PTFE) having a thickness such that its elasticity will compensate for any dimensional variation at the circumference of the metal component whilst affording sufficient resistance against the pressure arising during the injection or press-moulding operation. The claimed tool is cheaper to produce than prior-art design. as dimensional accuracy is less critical.

Description

Werkzeug zum Umspritzen und Umpressen von Metallteilen Die Erfindung betrifft ein Werkzeug zum Umspritzen oder Umpressen von Metallteilen insbesondere von Kontaktfedern zu Relaisfedersätzen. Tool for insert molding and overpressing metal parts. The invention relates in particular to a tool for insert molding or pressing around metal parts from contact springs to relay spring sets.

Relais-Xontaktfedersätze -werden in bekannter Weise aus metallischen Kontaktfedern und Isolierzwischenlagen aus Kunststoff, Keramik, Hartpapier usw. zu einem Paket geschichtet und zusammengeschraubt oder genietet. Das entstehende Paket wird auf dem Relaisantrieb befestigt. Da aus Funktionsgründen die Kontaktfedern einwandfrei isoliert sein müssen, ist die Verschraubung oder Nietung gesondert mit Isolierrohr zu versehen. Diese Fertigungsmethode ist relativ aufwendig und deshalb ist es bereits bekannt, Kontaktfedern mit thermoplastischen Kunststoffen zu umspritzen bzw. mit duroplastischen Kunststoffen zu umpressen.Relay contact spring sets are made from metallic ones in a known manner Contact springs and insulating layers made of plastic, ceramic, hard paper, etc. Layered into a package and screwed or riveted together. The emerging Package is attached to the relay drive. Since for functional reasons the contact springs must be properly insulated, the screwing or riveting is separate with To provide insulating tube. This production method is relatively complex and therefore it is already known to encapsulate contact springs with thermoplastics or to encapsulate with thermosetting plastics.

Damit an den Schließspalten des Werkzeuges keine flüssige Masse austritt, müssen diese Spalte sehr genau gearbeitet werden. Messerartige Netalleinsätze, die den Abstand von Ilontaktfeder zu Kontaktfeder bilden, werden durch Keile beim Arbeitsgang so auf die Kontaktfeder gepreßt, daß eine Abdichtung erfolgt.So that no liquid mass escapes at the closing gaps of the mold, this column must be worked very precisely. Knife-like net inserts that form the distance from contact spring to contact spring are made by wedges during the operation pressed onto the contact spring in such a way that a seal takes place.

Der Nachteil- dieser Technik ist einmal eine sehr genaue und teure Werkzeugherstellung, weiter erfordert das Einlegen der Kontaktfedern in das Werkzeug bei den enggehaltenen Schlitztoleranzen eine lange Rüstzeit.The disadvantage of this technique is once a very precise and expensive one Tool manufacture, furthermore, requires the contact springs to be inserted into the tool A long set-up time with the tight slot tolerances.

Aufgabe der Erfindung ist, billigere Werkzeuge mit größeren Einlege-Toleranzen verwenden zu können, ohne daß die Spritz-bzw. Preßmasse an den Stoßstellen austritt. Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Flächen des Werkzeugs, die beim Spritzen oder Pressen die einzubettenden Metallteile umschließen, einen ueberzug aus hochwarmfesten aber elastischen Kunststoff z.B. Polytetrafluoräthylen besitzen, dessen Auftrag so bemessen ist, daß durch seine Elastizität Naßtoleranzen am Umfang des Metallteiles ausgeglichen werden, aber eine ausreichende Widerstandsfähigkeit gegen die beim Spritz- und Preßvorgang entstehende Druckbelastung~vorhanden ist.The object of the invention is to provide cheaper tools with larger insertion tolerances to be able to use without the spray or. Molding compound emerges at the joints. This object is achieved according to the invention in that the surfaces of the tool which enclose the metal parts to be embedded during injection molding or pressing, a Cover made of highly heat-resistant but elastic plastic e.g. polytetrafluoroethylene own, the order is dimensioned so that wet tolerances due to its elasticity balanced on the circumference of the metal part but a sufficient one Resistance to the pressure load occurring during the injection molding and pressing process ~ present is.

In Ausgestaltung der Erfindung beträgt der Kunststoffauftrag 0,5 - 2 mm.In an embodiment of the invention, the amount of plastic applied is 0.5 - 2 mm.

In weiterer Ausgestaltung der Erfindung ist der-Kunststoff-Auftrag als Inlay ausgeführt. Ein Ausführungsbeispiel ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben.The plastic application is a further embodiment of the invention designed as an inlay. An embodiment is shown in the drawing and is described in more detail below.

Es zeigen Fig. 1 einen stark vereinfachten Relaisfedersatz mit in einem Spritz- oder Preßmasseblock (6) eingebetteten ~Kontaktfedern (2).1 shows a greatly simplified relay spring set with in contact springs (2) embedded in an injection or molding compound block (6).

Fig. 2 zeigt eine Preß- oder Spritzwerkzeughälfte,in der die Konturen der Kontaktfe-dern (2) und des Aufbaublockes (6) mit fertigungsgünstigen Ituftspalten (4) eingearbeitet sind. In dem Bereich, in dem eine Abdichtung gegen Austritt der flüssigen Masse notwendig ist, ist ein ueberzug (3) auf den die Kontaktfedern umschließenden Flächen angebracht. Der Auftrag des oberzugs ist so bemessen, daß durch seine Elastizität Luftspalte (4), die zum Einlegen der Kontaktfedern erforderlich sind, abgedichtet werden, wenn das Werkzeug geschlossen ist.Fig. 2 shows a press or injection mold half in which the contours the contact springs (2) and the mounting block (6) with easy-to-manufacture air gaps (4) are incorporated. In the area where there is a seal against leakage of the liquid mass is necessary, there is a coating (3) on the contact springs Surfaces attached. The order of the top train is dimensioned so that due to its elasticity Air gaps (4), which are required for inserting the contact springs, are sealed when the mold is closed.

Zu diesem Zwecke ist zusätzlich an der Schließfuge ein wulstartiger Auftrag (5) angebracht. Durch Versuche wurde ermittelt, daß je nach Kunststoffart der Uberzugs-Auftrag 0,5 - 2 mm betragen soll. Es ist weiter möglich, den Überzug in Form von Inlay einzulegen, das nach Abnutzung ausgetauscht wird. Eine Abnutzung erfolgt an Spritzwerkzeugen besonders an Kanten und Teilen, die in der Einspritzzone liegen, infolge Reibung des Füllmaterials der Spritzmasse.For this purpose, there is also a bead-like shape on the closing joint Order (5) attached. Experiments have shown that depending on the type of plastic the coating application should be 0.5 - 2 mm. It is also possible to use the coating to be inserted in the form of an inlay, which is replaced when worn. A wear and tear takes place on injection molds, especially on edges and parts that are in the injection zone lie, due to friction of the filling material of the injection molding compound.

Claims (3)

PatentansprücheClaims 1. Werkzeug zum Umspritzen oder Umpressen von Metallteilen insbesondere von Kontaktfedern zu Relaisfedersätzen dadurch gekennzeichnet, daß die Flächen des Werkzeuges 1, die beim Spritzen oder Pressen die einzubettenden Metallteile 2 umschließen, einen Überzug 3 aus hochwarmfesten aber elastischen Kunststoff z.B.Polytetrafluoräthylen besitzen, dessen Auftrag so bemessen ist, daß durch seine Elastizität Naßtoleranzen am Umfang des Metallteiles ausgeglichen werden aber eine ausreichende Widerstandsfähigkeit gegen die beim Spritz- und Preßvorgang entstehende Druckbelastung vorhanden ist.1. Tool for insert molding or pressing metal parts in particular of contact springs to relay spring sets, characterized in that the surfaces of the Tool 1, which enclose the metal parts 2 to be embedded during injection molding or pressing, a cover 3 made of highly heat-resistant but elastic plastic, e.g. poly-tetrafluoroethylene own, the order is dimensioned so that wet tolerances due to its elasticity at the circumference of the metal part but sufficient resistance is compensated against the pressure load arising during the injection molding and pressing process. 2. Werkzeug zum Umspritzen nach Anspruch 1 dadurch gekennzeichnet, daß der Kunststoffauftrag 0,5 - 2 mm beträgt.2. Tool for insert molding according to claim 1, characterized in that that the amount of plastic applied is 0.5 - 2 mm. 3. Werkzeug zum Umspritzen nach Anspruch 1 und 2 dadurch gekennzeichnet, daß der Kunststoffauftrag als Inlay ausgeführt ist.3. Tool for insert molding according to claim 1 and 2, characterized in that that the plastic application is designed as an inlay. LeerseiteBlank page
DE19732312298 1973-03-13 1973-03-13 Tool for coating or embedding metal components - esp. contact springs for relay spring assemblies Pending DE2312298A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19732312298 DE2312298A1 (en) 1973-03-13 1973-03-13 Tool for coating or embedding metal components - esp. contact springs for relay spring assemblies

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732312298 DE2312298A1 (en) 1973-03-13 1973-03-13 Tool for coating or embedding metal components - esp. contact springs for relay spring assemblies

Publications (1)

Publication Number Publication Date
DE2312298A1 true DE2312298A1 (en) 1974-09-19

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
DE19732312298 Pending DE2312298A1 (en) 1973-03-13 1973-03-13 Tool for coating or embedding metal components - esp. contact springs for relay spring assemblies

Country Status (1)

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DE (1) DE2312298A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2520884A1 (en) * 1975-05-10 1976-11-18 Ellenberger & Poensgen PROCEDURE FOR FASTENING AN INSULATING PART ON A DIRECTLY HEATED BIMETAL STRIP BY INJECTION PRESSES
DE2815987A1 (en) * 1978-04-13 1979-10-18 Ego Regeltech TEMPERATURE CONTROLLER WITH A SNAP SWITCH AND AN EXPANSION SECTION
DE2853667A1 (en) * 1978-12-13 1980-06-19 Fuchs Kg Otto Thermally insulated double metal profile - with magnetising strips holding profiles in position forming spaces filled with foaming resin
DE2937605A1 (en) * 1979-09-18 1981-03-26 Kontec GmbH, Konstruktion + Technik im Maschinenbau, 67227 Frankenthal Cast-on edging trim for coated chipboards - produced by injection into mould of resin held by liner
EP2228191A3 (en) * 2009-03-09 2014-05-21 Wilo Se Seal element for sealing electrical contact elements during injection moulding

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2520884A1 (en) * 1975-05-10 1976-11-18 Ellenberger & Poensgen PROCEDURE FOR FASTENING AN INSULATING PART ON A DIRECTLY HEATED BIMETAL STRIP BY INJECTION PRESSES
FR2310861A1 (en) * 1975-05-10 1976-12-10 Ellenberger & Poensgen FIXING PROCESS, USING A TRANSFER PRESS, OF A PIECE IN INSULATING MATERIAL ON A DIRECT HEATED BILAME
DE2815987A1 (en) * 1978-04-13 1979-10-18 Ego Regeltech TEMPERATURE CONTROLLER WITH A SNAP SWITCH AND AN EXPANSION SECTION
DE2853667A1 (en) * 1978-12-13 1980-06-19 Fuchs Kg Otto Thermally insulated double metal profile - with magnetising strips holding profiles in position forming spaces filled with foaming resin
DE2937605A1 (en) * 1979-09-18 1981-03-26 Kontec GmbH, Konstruktion + Technik im Maschinenbau, 67227 Frankenthal Cast-on edging trim for coated chipboards - produced by injection into mould of resin held by liner
EP2228191A3 (en) * 2009-03-09 2014-05-21 Wilo Se Seal element for sealing electrical contact elements during injection moulding

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