WO1992013376A1 - Gapless join between a first part and a plastics part injection-moulded on to the first part - Google Patents

Gapless join between a first part and a plastics part injection-moulded on to the first part Download PDF

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Publication number
WO1992013376A1
WO1992013376A1 PCT/DE1991/000890 DE9100890W WO9213376A1 WO 1992013376 A1 WO1992013376 A1 WO 1992013376A1 DE 9100890 W DE9100890 W DE 9100890W WO 9213376 A1 WO9213376 A1 WO 9213376A1
Authority
WO
WIPO (PCT)
Prior art keywords
plastic
sealing compound
metallic
connection
joins
Prior art date
Application number
PCT/DE1991/000890
Other languages
German (de)
French (fr)
Inventor
Werner Pfander
Ewald TRÄNKLE
Kristian Leo
Manfred KRÄMER
Hans-Jürgen HERDERICH
Rainer HÄBERER
Erich EBENHÖH
Jürgen ENZNER
Roger Seemeyer
Klaus Heyer
Uwe Köhler
Original Assignee
Robert Bosch 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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO1992013376A1 publication Critical patent/WO1992013376A1/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/20—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for assembling or disassembling contact members with insulating base, case or sleeve
    • H01R43/24—Assembling by moulding on contact members
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H01R13/521—Sealing between contact members and housing, e.g. sealing insert
    • 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
    • B29C2045/1486—Details, accessories and auxiliary operations
    • B29C2045/14893—Preventing defects relating to shrinkage of inserts or coating material

Definitions

  • the invention is based on a gap-free connection between a first part and a plastic part produced by injection molding and sprayed onto the first part according to the preamble of the main claim.
  • the sealing compound arranged between the parts is melted or melted when the plastic is sprayed on, after which it forms a cohesive connection with the two parts, which ensures the desired freedom from sealing and gaps.
  • a known gas and liquid-tight connection of the generic type (DE-PS 1 001 483)
  • a highly porous metal layer is sintered or sprayed onto a metal body forming the first part, into which a plastic compound serving as a solder or connection layer is melted.
  • This embodiment requires several additional work steps, which make the finished product more expensive, and is limited to the connection of injection molded plastic parts with metal parts.
  • the sealing compound provided between the plastic parts to be connected is a Hot melt adhesive, which in the initial state is introduced in the form of a thread or a film into a groove-shaped depression in the first part, or is applied as a hardening film in a viscous state to the first part.
  • the arrangement according to the invention with the characterizing features of the main claim has the advantage that no precautions must be taken to make the product more expensive to accommodate the sealant on the first part and that the sealant can be applied to the first part with measures that are well suited for mass production.
  • a design that also meets high demands with regard to gas and moisture tightness results if a solvent-containing PUR or alkyd resin lacquer is used as the sealing compound.
  • the first part carrying the sealing compound is a metallic component, e.g.
  • a contact pin of an electrical connector results in a simple design if this part is provided with a coating of baked enamel in the contact zone encompassed by this after the plastic has been sprayed on.
  • FIG. 1 shows a connector holder in side view and partly in section
  • FIG. 2 shows the connector holder according to FIG. 1 in the direction of arrow A in FIG. 1
  • FIG. 3 shows, on an enlarged scale, a metallic contact element of the connector holder according to FIG. 1.
  • the plug holder has a plastic holding body 10 which has a support flange 14 provided with bores 12 for fastening screws and a plug socket 16 which is integrally connected to it.
  • the other end sections of the contact pins 18 project into a recess 24 of the holding body 10 that extends from the free end face of the socket 16.
  • the holding body 10 is sprayed onto the metallic contact pins 18.
  • the not yet overmolded contact pins 18 are in a region 26 which also encompasses the contact zone later encompassed by the plastic and has a coating 28 of baked lacquer Mistake. This is applied to the contact pin 18 by dipping or spraying and has a melting point which is below the injection molding temperature of the plastic forming the holding body 10.
  • the coating 28 is melted when the plastic forming the holding body 10 is sprayed on and, when it solidifies, forms a cohesive connection with the plastic and the metallic surface of the contact pin 18, which results in the desired freedom from gaps or leaks.
  • the contact pins 18 are provided with annular grooves 30, which ensure a positive anchoring in the holding body 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

In prior art joins of this kind, the sealing compound between the parts is melted into a porous metal layer applied to the first part, or it is a fusion adhesive applied in the form of a filament or film in an annular groove in the first part, or it can be a hardening film applied while still in the viscous state to the part. The invention uses synthetic resin as the sealing compound, simplifying the production of such joins and thus reducing the cost of the end product. The preferred application of the invention is in the production of joins with electrical components such as plugs and sensors.

Description

Spaltfreie Verbindung zwischen einem ersten Teil und einem auf dieses aufσespritzen KunststoffteilGap-free connection between a first part and a plastic part sprayed onto it
Stand der TechnikState of the art
Die Erfindung geht aus von einer spaltfreien Verbindung zwischen ei¬ nem ersten Teil und einem durch Spritzgießen hergestellten, auf das erste Teil aufgespritzten Kunststoffteil nach dem Gattungsbegriff des Hauptanspruchs. Bei derartigen Verbindungen wird die zwischen den Teilen angeordnete Dichtmasse beim Aufspritzen des Kunststoffs auf- bzw. angeschmolzen, wonach sie beim Erkalten eine die gewünsch¬ te Dicht- bzw. Spaltfreiheit sicherstellende stoffschlüssige Verbin¬ dung mit den beiden Teilen eingeht. Bei einer bekannten gas- und flüssigkeitsdichten Verbindung der gattungsmäßigen Art (DE-PS 1 001 483) ist auf einen das erste Teil bildenden Metallkör¬ per eine hochporöse Metallschicht aufgesintert oder aufgespritzt, in die eine als Lot- bzw. VerbindungsSchicht dienende Kunststoffmasse eingeschmolzen ist. Diese Ausführung erfordert mehrere, das fertige Erzeugnis verteuernde zusätzliche Arbeitsgänge und ist auf Verbin¬ dungen von Kunststoffspritzteilen mit Metallteilen beschränkt.The invention is based on a gap-free connection between a first part and a plastic part produced by injection molding and sprayed onto the first part according to the preamble of the main claim. In the case of such connections, the sealing compound arranged between the parts is melted or melted when the plastic is sprayed on, after which it forms a cohesive connection with the two parts, which ensures the desired freedom from sealing and gaps. In a known gas and liquid-tight connection of the generic type (DE-PS 1 001 483), a highly porous metal layer is sintered or sprayed onto a metal body forming the first part, into which a plastic compound serving as a solder or connection layer is melted. This embodiment requires several additional work steps, which make the finished product more expensive, and is limited to the connection of injection molded plastic parts with metal parts.
Bei einer anderen, nach § 3 (2) PatG zum Stand der Technik zählenden Verbindung der gattungsmäßigen Art (DE-P 39 30 702.6) ist die zwi¬ schen den zu verbindenen Kunststoffteilen vorgesehene Dichtmasse ein Schmelzkleber, der im Ausgangszustand in Form eines Fadens oder ei¬ ner Folie in eine nutförmige Vertiefung des ersten Teils einge- bracht, oder als aushärtender Film in zähflüssigem Zustand auf das erste Teil aufgetragen ist.In the case of another connection of the generic type (DE-P 39 30 702.6) which is part of the prior art according to § 3 (2) PatG, the sealing compound provided between the plastic parts to be connected is a Hot melt adhesive, which in the initial state is introduced in the form of a thread or a film into a groove-shaped depression in the first part, or is applied as a hardening film in a viscous state to the first part.
Vorteile der ErfindungAdvantages of the invention
Die erfindungsgemäße Anordnung mit den kennzeichnenden Merkmalen des Hauptanspruchs hat den Vorteil, daß zur Aufnahme der Dichtmasse am ersten Teil keine das Erzeugnis verteuernden Vorkehrungen getroffen werden müssen und daß die Dichtmasse mit für die Mengenfertigung gut geeigneten Maßnahmen auf das erste Teil aufgebracht werden kann.The arrangement according to the invention with the characterizing features of the main claim has the advantage that no precautions must be taken to make the product more expensive to accommodate the sealant on the first part and that the sealant can be applied to the first part with measures that are well suited for mass production.
Durch die in den Unteransprüchen enthaltenen Maßnahmen sind vorteil¬ hafte Weiterbildungen der Anordnung nach dem Hauptanspruch möglich.The measures contained in the subclaims allow advantageous developments of the arrangement according to the main claim.
Eine auch hohen Ansprüchen bezüglich Gas- und Feuchtigkeitsdichtheit genügende Ausführung ergibt sich, wenn als Dichtmasse ein lösemit- telhaltiger PUR- oder Alkydharzlack verwendet ist.A design that also meets high demands with regard to gas and moisture tightness results if a solvent-containing PUR or alkyd resin lacquer is used as the sealing compound.
Wenn das die Dichtmasse tragende erste Teil ein metallisches Bauele¬ ment ist, z.B. ein Kontaktbolzen eines elektrischen Steckers, ergibt sich eine einfache Ausführung, wenn dieses Teil in der nach dem Auf¬ spritzen des Kunststoffs von diesem umgriffenen Kontaktzone mit ei¬ nem Überzug aus Backlack versehen ist.If the first part carrying the sealing compound is a metallic component, e.g. A contact pin of an electrical connector results in a simple design if this part is provided with a coating of baked enamel in the contact zone encompassed by this after the plastic has been sprayed on.
Zeichnungdrawing
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung darge¬ stellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen Figur 1 einen Steckerhalter in Seitenansicht und teilweise im Schnitt, Figur 2 den Steckerhalter nach Figur 1 in Richtung des Pfeils A in Figur 1 gesehen, und Figur 3 in vergrößertem Maßstab ein metallisches Kontaktelement des Steckerhalters nach Figur 1. Beschreibung des AusführungsbeispielsAn embodiment of the invention is shown in the drawing and explained in more detail in the following description. 1 shows a connector holder in side view and partly in section, FIG. 2 shows the connector holder according to FIG. 1 in the direction of arrow A in FIG. 1, and FIG. 3 shows, on an enlarged scale, a metallic contact element of the connector holder according to FIG. 1. Description of the embodiment
Der Steckerhalter hat einen aus Kunststoff bestehenden Haltekörper 10, der einen mit Bohrungen 12 für Befestigungsschrauben versehenen Tragflansch 14 und eine einstückig mit diesem verbundenen Steckbuch¬ se 16 aufweist. In dieser sind mehrere metallische Kontaktstifte 18 angeordnet, deren in Figur 1 rechte Endabschnitte durch eine Ausneh¬ mung 20 im Haltekörper 10 hindurchragen und über dessen Seitenwand 22 hervorstehen. Die anderen Endabschnitte der Kontaktstifte 18 ra¬ gen in eine von der freien Stirnseite der Steckbuchse 16 ausgehende Ausnehmung 24 des Haltekörpers 10 hinein.The plug holder has a plastic holding body 10 which has a support flange 14 provided with bores 12 for fastening screws and a plug socket 16 which is integrally connected to it. Arranged in this are a plurality of metallic contact pins 18, the end portions of which on the right in FIG. 1 protrude through a recess 20 in the holding body 10 and protrude beyond the side wall 22 thereof. The other end sections of the contact pins 18 project into a recess 24 of the holding body 10 that extends from the free end face of the socket 16.
Der Haltekörper 10 ist auf die metallischen Kontaktstifte 18 aufge¬ spritzt. Um eine spaltfreie bzw. druck- und feuchtigkeitsdichte Ver¬ bindung zwischen den Teilen zu erhalten, sind die noch nicht um¬ spritzten Kontaktstifte 18 (Fig. 3) in einem auch die später vom Kunststoff umgriffene Kontaktzone umfassenden Bereich 26 mit einem Überzug 28 aus Backlack versehen. Dieser ist durch Tauchen oder Auf¬ sprühen auf den Kontaktstift 18 aufgebracht und hat einen Schmelz¬ punkt, der unter der Spritzgießtemperatur des den Haltekörper 10 bildenden Kunststoffs liegt.The holding body 10 is sprayed onto the metallic contact pins 18. In order to obtain a gap-free or pressure-tight and moisture-tight connection between the parts, the not yet overmolded contact pins 18 (FIG. 3) are in a region 26 which also encompasses the contact zone later encompassed by the plastic and has a coating 28 of baked lacquer Mistake. This is applied to the contact pin 18 by dipping or spraying and has a melting point which is below the injection molding temperature of the plastic forming the holding body 10.
Der Überzug 28 wird beim Aufspritzen des den Haltekörper 10 bilden¬ den Kunststoffs aufgeschmolzen und geht bei seiner Erstarrung eine stoffschlüssige Verbindung mit dem Kunststoff und der metallischen Oberfläche des Kontaktstifts 18 ein, wodurch sich die erwünschte Spaltfreiheit bzw. Dichtheit ergibt. Die Kontaktstifte 18 sind mit Ringnuten 30 versehen, die eine formschlüssige Verankerung im Halte¬ körper 10 sicherstellen. The coating 28 is melted when the plastic forming the holding body 10 is sprayed on and, when it solidifies, forms a cohesive connection with the plastic and the metallic surface of the contact pin 18, which results in the desired freedom from gaps or leaks. The contact pins 18 are provided with annular grooves 30, which ensure a positive anchoring in the holding body 10.

Claims

Ansprüche Expectations
1. Spaltfreie Verbindung zwischen einem ersten Teil und einem durch Spritzgießen hergestellten, auf das erste Teil aufgespritzten Kunst¬ stoffteil, wobei in der Kontaktzone der beiden Teile eine auf das erste Teil vor dem Aufspritzen des Kunststoffteils aufgebrachte Dichtmasse aus Kunststoff vorhanden ist, deren Schmelzpunkt niedri¬ ger als die Verarbeitungstemperatur des Spritzgießwerkstoffs ist, dadurch gekennzeichnet, daß als Dichtmasse (28) ein Kunstharz ver¬ wendet ist, welches vorzugsweise durch Tauchen oder Aufsprühen auf die Kontaktzone des ersten Teils (18) aufgebracht ist.1. Gap-free connection between a first part and a plastic part produced by injection molding and sprayed onto the first part, wherein in the contact zone of the two parts there is a plastic sealing compound applied to the first part before the plastic part is sprayed on, the melting point of which is low ¬ is lower than the processing temperature of the injection molding material, characterized in that a synthetic resin is used as the sealing compound (28), which is preferably applied to the contact zone of the first part (18) by dipping or spraying.
2. Verbindung nach Anspruch 1, dadurch gekennzeichnet, daß als Dichtmasse (28) ein l semittelhaltiger PUR- oder Alkydharzlack dient.2. A compound according to claim 1, characterized in that a l medium-containing PUR or alkyd resin varnish is used as the sealing compound (28).
3. Verbindung eines metallischen Teils mit einem Kunststoffteil, das auf das metallische Teil aufgespritzt ist, nach Anspruch 1, dadurch gekennzeichnet, daß das metallische Teil (18) mindestens in der vom Kunststoffteil (10) umgriffenen Kontaktzone mit einem Überzug (28) aus Backlack versehen ist.3. Connection of a metallic part with a plastic part, which is sprayed onto the metallic part, according to claim 1, characterized in that the metallic part (18) at least in the contact area encompassed by the plastic part (10) with a coating (28) made of baking lacquer is provided.
4. Verbindung nach Anspruch 3, dadurch gekennzeichnet, daß das me¬ tallische Teil (18) in der Kontaktzone mit Schultern (30) zum form¬ schlüssigen Verankern mit dem Kunststoffteil (10) versehen ist. 4. Connection according to claim 3, characterized in that the metallic part (18) in the contact zone with shoulders (30) for positive locking is provided with the plastic part (10).
PCT/DE1991/000890 1991-01-18 1991-11-15 Gapless join between a first part and a plastics part injection-moulded on to the first part WO1992013376A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19914101361 DE4101361A1 (en) 1991-01-18 1991-01-18 GAP-FREE CONNECTION BETWEEN A FIRST PART AND A PLASTIC PART INJECTED ON THIS
DEP4101361.1 1991-01-18

Publications (1)

Publication Number Publication Date
WO1992013376A1 true WO1992013376A1 (en) 1992-08-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1991/000890 WO1992013376A1 (en) 1991-01-18 1991-11-15 Gapless join between a first part and a plastics part injection-moulded on to the first part

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WO (1) WO1992013376A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2282276A (en) * 1993-09-20 1995-03-29 Heidelberger Druckmasch Ag Connecting a control circuit in a housing to a machine outside the housing
EP0664204A2 (en) * 1994-01-19 1995-07-26 VERWALTUNGSGESELLSCHAFT GEIGER TECHNIK GmbH & Co. KG Element, preferably metallic, particularly buried in a plastic article
FR2751581A1 (en) * 1996-07-26 1998-01-30 Connectic Metallo PROCESS FOR OVERMOLDING A SILICONE PART ON AN EXTENDED ELEMENT AND HIGH VOLTAGE CONNECTION DEVICE OBTAINED BY THIS PROCESS

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19936370C2 (en) * 1999-08-03 2003-01-16 Siemens Ag Tight conductor lead through plastic wall
CN110635301B (en) * 2018-06-21 2020-12-18 映兴电子股份有限公司 Knife type waterproof connector

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0126403A1 (en) * 1983-05-18 1984-11-28 Siemens Aktiengesellschaft Process for manufacturing tight construction elements
DE3809183A1 (en) * 1986-10-30 1989-09-28 Denki Kagaku Kogyo Kk ADHESIVE AND ADHESIVE METHOD
US4913673A (en) * 1988-07-29 1990-04-03 Amp Incorporated Hermetically sealed connector

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0126403A1 (en) * 1983-05-18 1984-11-28 Siemens Aktiengesellschaft Process for manufacturing tight construction elements
DE3809183A1 (en) * 1986-10-30 1989-09-28 Denki Kagaku Kogyo Kk ADHESIVE AND ADHESIVE METHOD
US4913673A (en) * 1988-07-29 1990-04-03 Amp Incorporated Hermetically sealed connector

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2282276A (en) * 1993-09-20 1995-03-29 Heidelberger Druckmasch Ag Connecting a control circuit in a housing to a machine outside the housing
US5563371A (en) * 1993-09-20 1996-10-08 Heidelberger Druckmaschinen Ag Housing for an operation-controlling electrical system
EP0664204A2 (en) * 1994-01-19 1995-07-26 VERWALTUNGSGESELLSCHAFT GEIGER TECHNIK GmbH & Co. KG Element, preferably metallic, particularly buried in a plastic article
EP0664204A3 (en) * 1994-01-19 1995-11-08 Geiger Plastic Verwaltung Element, preferably metallic, particularly buried in a plastic article.
FR2751581A1 (en) * 1996-07-26 1998-01-30 Connectic Metallo PROCESS FOR OVERMOLDING A SILICONE PART ON AN EXTENDED ELEMENT AND HIGH VOLTAGE CONNECTION DEVICE OBTAINED BY THIS PROCESS
EP0822049A1 (en) * 1996-07-26 1998-02-04 Connectic Metallo Method for coating a silicone part on an elongated element and high voltage connecting device obtained by this method

Also Published As

Publication number Publication date
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