EP0505745B1 - Elektrischer Steckverbinder, Verfahren zu seiner Herstellung und Spritzformwerkzeug sowie Gehäuse zur Durchführung des Verfahrens - Google Patents

Elektrischer Steckverbinder, Verfahren zu seiner Herstellung und Spritzformwerkzeug sowie Gehäuse zur Durchführung des Verfahrens Download PDF

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Publication number
EP0505745B1
EP0505745B1 EP92103124A EP92103124A EP0505745B1 EP 0505745 B1 EP0505745 B1 EP 0505745B1 EP 92103124 A EP92103124 A EP 92103124A EP 92103124 A EP92103124 A EP 92103124A EP 0505745 B1 EP0505745 B1 EP 0505745B1
Authority
EP
European Patent Office
Prior art keywords
housing
distance
cable
sleeve
injection moulding
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 - Lifetime
Application number
EP92103124A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0505745A3 (en
EP0505745A2 (de
Inventor
Helmut Häussler
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.)
Hirschmann Electronics GmbH and Co KG
Original Assignee
Hirschmann Electronics GmbH and Co KG
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 Hirschmann Electronics GmbH and Co KG filed Critical Hirschmann Electronics GmbH and Co KG
Publication of EP0505745A2 publication Critical patent/EP0505745A2/de
Publication of EP0505745A3 publication Critical patent/EP0505745A3/de
Application granted granted Critical
Publication of EP0505745B1 publication Critical patent/EP0505745B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • 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

Definitions

  • the invention relates to an electrical connector, a method for its production and an injection molding tool and a housing for carrying out the method according to the preamble of claims 1, 5, 11 and 16 respectively.
  • Connectors that are particularly intended for outdoor use or are exposed to the effects of moisture or wetness place high demands on the seal against the ingress of moisture or wetness. This applies in particular to connectors of motor vehicles in which the influence of moisture or wetness is particularly great due to the vehicle speed.
  • a weak point where water or moisture can penetrate the connector is the cable entry.
  • a connector described in DE-C-37 26 515 its plastic housing has a cable entry socket which consists of two axially spaced socket parts which are connected to one another by four spacer webs.
  • the nozzle parts are each formed by two half-shells, the dividing joint running so that the half-shells on one side and the half-shells on the other side are each connected by two spacer webs and a half-shell of the contact-side nozzle part is molded onto the plastic housing.
  • this connector In the area of the cable entry socket, this connector is surrounded by a plastic sheathing that covers the distance fills between the nozzle parts and is thus in contact with the peripheral surfaces of the cable and the spacer webs.
  • creepage distances for water or moisture between the peripheral surfaces of the spacer webs and the plastic covering cannot be ruled out.
  • annular ribs are provided on the spacer webs, which represent barriers on these creepage distances and are intended to make it difficult for water or moisture to pass through.
  • This known embodiment is disadvantageous because, despite the presence of the ring ribs, creepage distances for water or moisture in the area of the spacing webs cannot be ruled out and, moreover, the ring ribs complicate both the manufacture of the injection molding tool for the encapsulation of the plastic casing and the encapsulation itself and also make the manufacture of connectors more expensive .
  • the invention has for its object to design a connector, a method for its production and an injection mold and a housing for performing the method so that wet creepage distances in the region of the spacer web are safely avoided.
  • connection between the connecting piece parts is or is reliably interrupted by breaking or shearing off the at least one spacer web and thus also water or wet creepage distances in the region of the spacer web.
  • the spacer web or parts thereof can remain in the molding space or be removed from the molding space before the plastic is injected into the molding space. If the at least one spacer web or parts thereof remain in the molding space, they are embedded in the encapsulation plastic, so that they cannot form creepage distances in the region of the spacer web material in this case either.
  • the housing of the connector can also be made of glass fiber reinforced plastic, in particular polyamide. Also, the spacer bar can be broken and sheared off without problems. Since there is no need to take into account a certain viscosity (melting point) of the plastic, the invention also makes it possible - apart from any breakability that may be required - to select suitable plastics without restriction. Furthermore, the spacer web can be produced in a simple form, which simplifies the spraying and the production of the injection molding tool. As a result, it is also possible to produce the connector as a whole, its housing and the injection mold more cheaply.
  • the shearing off or breaking of the spacer web can then be implemented very simply and without problems if the housing is optionally positioned with the cable in the injection molding tool. Shearing or breaking can be accomplished easily and quickly in this position by means of at least one stamp which is displaceably mounted in a guide of the injection molding tool and is displaceable against the spacer web. It is advantageous to make the arrangement so that the stamp or stamps can be pushed against the spacer web from above. If the mold space is open on the underside, sheared or broken-off spacer web parts are automatically removed from the mold space by gravity, falling away downwards. The mold space can be closed in a very advantageous manner by the at least one stamp itself. For this purpose, this is to be provided with a recess, the wall of which partially forms the wall of the mold space.
  • the at least one spacer web can also be broken or broken off by rotating the connecting piece parts relative to one another, since a plastic material is used for the housing that is used at normal temperatures is brittle and can therefore be broken relatively easily.
  • the cable-side connector part is preferably rotated, wherein the contact-side connector part or the main part of the housing can remain stationary in the injection molding tool.
  • the turning is easy to use and easy to carry out if a tool engagement element is arranged on the part to be rotated, which can be attacked with a turning tool.
  • the plug connector 1 is part of an electrical plug-in device which serves to connect electrical contact elements to one another or to separate them.
  • the connector 1 can be both a plug part and a coupling part.
  • the connector 1 has a housing 2 made of plastic, at one end of which a cable entry piece 3 with an axial through hole 4 is arranged.
  • An electric one Cable 5 extends through the cable inlet connection 3 into the cavity, not shown, of the housing 2, where the wires 6, not shown, of the cable 5 are connected to contact elements, not shown, of the connector 1.
  • the cable entry socket 3 consists of two socket parts 7, 8 lying one behind the other in the longitudinal direction of the connector 1 and having an axial spacing from one another, which - insofar as the housing 2 is concerned as an intermediate product - are connected in one piece by four axial spacer webs 9, which are connected on an associated one Pitch circle are arranged distributed.
  • the spacing webs 9 have been removed and the space 10 between the connecting piece parts 7, 8 has been poured out or injection-molded with plastic.
  • This plastic is part of a sheath 12 which can only extend in the area of the intermediate space 10 or also in the longitudinal direction over part or over the entire length of the cable entry socket 3.
  • T-shaped projections 11 with undercuts are preferably arranged on the mutually facing end faces of the connecting piece parts 7, 8, said undercuts engaging in the casing 12 in a form-fitting manner or being positively engaged behind it. Since the contact-side connecting piece 7 is integrally formed on the rear of the housing 2, the connecting piece parts 7, 8 are positively and non-detachably connected to one another by the covering 2.
  • the nozzle parts 7, 8 and the casing 12 preferably have round cross sections.
  • the nozzle parts 7, 8 preferably each consist of two half-shells 7a, 7b, 8a, 8b, of which one half-shell 7a is integrally formed on the housing body, while the associated one Another half-shell 7b is either a free component that can be plugged onto the half-shell 7a, in particular can be clipped on, or can also be connected to the associated half-shell 7a by a film hinge (not shown) which, as is known per se, is arranged on one end edge of the division joint 13 and can be connected to the associated half-shells 7a, 7b in one piece.
  • the half-shells 8a, 8b of the cable-side connecting piece 8 can also be connected to one another or locked.
  • the casing 12 is preferably dimensioned so long that it covers the radial dividing joint 14 between the half-shell 7b and the rest of the connecting piece part 7 on the contact side.
  • Ring webs 15 are preferably arranged on the inner walls of the nozzle parts 7, 8 or the half-shells 7a, 7b, 8a, 8b, which press into the outer surface of the cable 5 and thus contribute to sealing against axial water or moisture penetration, but especially when Spraying process prevents the spray material from escaping and ensures defined spraying conditions.
  • the housing 2, which is made of plastic, is thus either in one part or two parts as an intermediate product.
  • the housing body 1a and the housing shells 7a, 8a, as well as the spacer webs 9a connecting them to one another are integrally connected to one another, the half-shells 7b, 8b connected to one another by the spacer webs 9b forming the second component.
  • the first case arises when the housing shells 7b, 8b are connected in one piece to the associated housing shells 7a, 8a by film hinges already mentioned.
  • the housing 2 which has been produced as an intermediate product, is inserted into an injection mold 16 which is shown schematically in FIGS.
  • the shape and size of the molding space is adapted to the shape and size of the casing 12 and, in the present case, is round in the section of the housing 2 parallel to the plane of the drawing.
  • the injection molding tool 16 has a receptacle for the housing 2, into which the latter can be inserted axially, for example.
  • a receptacle can be formed by a hole 18 in the form of a bore or stepped bore and in the shape and size of the circumference of the connector parts 7, 8, into which the cable entry connector 3 with its connector parts 7, 8 can be inserted with little movement.
  • two guide channels 19 Arranged in the injection molding tool 16 are two guide channels 19 which are spaced apart from one another and preferably extend perpendicularly and at right angles to the mold space axis 18 coinciding with the axis of the housing 2 and in which rod-shaped or strip-shaped separating knives 21 are slidably mounted.
  • the distance a between the adjacent side surfaces 22 of the guide channels 19 is dimensioned slightly smaller than the distance between the spacer web pairs.
  • the width of the separating knives 21 directed transversely to the plane of the drawing in FIGS. 2 to 4 is adapted to the axial length of the intermediate space 10 or the spacing webs 9 the direction of displacement (double arrow 24) spacing webs 9b, 9a, one behind the other, these being sheared off.
  • the end faces 23 preferably form an acute angle w of approximately 30 to 60 ° with the inner side faces 25 of the separating knives 21.
  • the end faces 23 can be rounded or run angled so that starting from the knife tip 26 they first enclose the angle w and then a larger angle with the associated side surfaces 25.
  • the separating knives 21 can be fork-shaped and thus preferably connected to one another in one piece, so that a common drive (not shown) is sufficient to first move both separating knives 21 down and then up again. After the separating knives 21 have been advanced, the sheared-off spacer webs 9 automatically fall out of the mold space 17 and preferably also out of the injection molding tool 16 through the guide channels 19 due to gravity. You do not need to be removed by any special measure.
  • FIG. 2 shows the separating knives 21 in a position located above the molding space 17, in which the housing 2 has been inserted into the receiving space of the injection molding tool 16.
  • the separating knives 21 can be displaced downward beyond the spacing webs 9 or the molding space 17, specifically into a position in which two recesses 27 present in the mutually facing side surfaces 25 are arranged coaxially with the molding space 17, as shown in FIG. 4 is shown.
  • the circular-segment-shaped recesses 27 with their circular-arcuate walls 28 complement the molding space 17 to its circular shape, the walls 28 adjoining the circular-arc-shaped boundary surfaces 29 which form the molding space 17 in the region of the existing between the guide channels 19 Limit web wall 31 of injection mold 16.
  • Further segment-shaped boundary surfaces 32 extending transversely to the mold space axis 18 can be formed on the web wall 31, or they can also be formed by the step surface 33 of the housing body 2.
  • boundary surfaces 32 also correspond to arcuate or segment-shaped further boundary surfaces 34 which can be formed by the guide surfaces 35 of the guide channels 19 or which can also be circular-section side surfaces of the recesses 27. The latter is dependent on the size of the width dimension of the separating knife 21 directed transversely to the plane of the drawing in FIGS. 2 to 4.
  • the mold space 17 in the region of the guide channels 19 is closed by their mold space delimiting surfaces. In this position, plastic which has been heated above its melting temperature is injected into the molding space 17 through a feed channel (not shown), and thus the casing 12 is produced.
  • the cable 5 has of course been previously inserted into the housing 2. After the injection molded plastic has cooled, the connector 1 thus formed can be removed from the injection molding tool 16.
  • the spacer webs 9a, 9b have a rectangular or - due to an outside rounding - approximately triangular cross-section, with spacer webs 9a, 9b on both sides of the existing axial dividing joint 13 lying close together.
  • circular spacer webs 9a, 9b are provided in cross section, which are arranged evenly distributed on a pitch circle and lie in axial central planes that are perpendicular to one another or an angle of about 45 ° with the axial parting line 13.
  • radial projections 11a are provided in the embodiment according to FIG. 5, which are overlapped by the meterial of the casing, not shown.
  • the spacer webs 9a, 9b can also be broken by rotating the connecting piece parts 7, 8 relative to one another.
  • the cable-side connector part 8 is preferably rotated in the position of the housing 2 accommodated in the injection molding tool 16, wherein preferably engagement elements are provided on the connector part 8 to be rotated, in particular in the form of holes 36 lying opposite with respect to the central axis, into which a turning tool (not shown) is included can be inserted into the holes 36 insertable pin.
  • a turning tool not shown
  • the spacing webs 9a, 9b are assigned a predetermined breaking point S, which can be formed by a notch, which is preferably arranged in the middle position of the spacing webs 9a, 9b.
  • the notches are preferably located on the outside of the spacing webs 9a, 9b.
  • the rotation of the nozzle part 8 to be rotated should take place so far that the broken-off spacer web parts are spaced apart from one another in the circumferential direction.
  • This angle w1 is preferably approximately 20 °. In this position, the plastic heated above its melting temperature is used to form the casing 12 into the mold space of the injection molding tool 16 injected. When turning the one nozzle part 8, the other is to be secured against rotation.
  • the injection molding tool 16 can be made considerably simpler because cutting knives 21 with the guide channels 19 leading them are not required.
  • pin connections 37 in the form of pins and holes, preferably axial webs and grooves, are provided on or in the surfaces of the dividing joint 13 for the purpose of centering the half-shells 7a, 7b, 8a, 8b to one another.
  • injection mold 16 in two parts with a dividing joint 38 that intersects the mold space axis. This can facilitate the production of the molding tool 16 and the demolding of the connector 1.
  • the method described above using the exemplary embodiment according to FIGS. 6 to 8 differs in that instead of shearing off or breaking, the spacing webs 9 are separated by the separating knives 21, i. H. after inserting the housing 2 into the injection molding tool 16, the spacer webs 9a, 9b are broken by rotating the nozzle part 8. The liquid plastic can then be injected into the mold space 17.
  • the spacing webs 9a, 9b are reliably interrupted and thus also possible creepage distances for water or moisture or moisture in their area.
  • a simple and inexpensive to produce shape for the injection molding tool 16 is achieved because ring webs arranged on the spacer webs 9a, 9b and necessary in the prior art are eliminated.
  • the necessary monitoring and cleaning measures for cleaning the shaped grooves for the ring webs in the injection molding tool are not required at certain intervals. Maintenance costs are thus also significantly reduced. Since in the invention there are no ring webs on the spacing webs 9a, 9b, there is also no danger that the ring webs will be damaged, for example, abraded, as is the case with the known embodiment described at the beginning.
  • the spacer webs 9a, 9b can be made relatively thick-walled and in simple cross-sectional shapes. Since the spacer webs 9a, 9b are not melted off, there are no restrictions apart from the material brittleness required in a method according to the invention regarding the choice of materials. So you can choose materials with the highest temperature resistance for the most important part of the connector 1. Since the need for thin walls is also eliminated, there is no restriction due to the viscosity of the plastic. A preferably automatic removal of the spacing webs 9a, 9b can be achieved.
  • the injection point for the injection mold can be chosen freely.

Landscapes

  • Injection Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
EP92103124A 1991-03-28 1992-02-25 Elektrischer Steckverbinder, Verfahren zu seiner Herstellung und Spritzformwerkzeug sowie Gehäuse zur Durchführung des Verfahrens Expired - Lifetime EP0505745B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4110383A DE4110383C1 (enrdf_load_stackoverflow) 1991-03-28 1991-03-28
DE4110383 1991-03-28

Publications (3)

Publication Number Publication Date
EP0505745A2 EP0505745A2 (de) 1992-09-30
EP0505745A3 EP0505745A3 (en) 1992-11-25
EP0505745B1 true EP0505745B1 (de) 1995-01-04

Family

ID=6428501

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92103124A Expired - Lifetime EP0505745B1 (de) 1991-03-28 1992-02-25 Elektrischer Steckverbinder, Verfahren zu seiner Herstellung und Spritzformwerkzeug sowie Gehäuse zur Durchführung des Verfahrens

Country Status (3)

Country Link
EP (1) EP0505745B1 (enrdf_load_stackoverflow)
AT (1) ATE116766T1 (enrdf_load_stackoverflow)
DE (2) DE4110383C1 (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112013006421B4 (de) 2013-01-15 2022-09-01 Aktiebolaget Skf Sensoreinheit und instrumentiertes Lager umfassend eine derartige Sensoreinheit
DE102015208628A1 (de) * 2015-05-08 2016-11-10 Te Connectivity Germany Gmbh Spritzgegossenes Formteil, Verbinder mit einem spritzgegossenen Formteil, Verfahren und Werkzeug zum Herstellen eines spritzgegossenen Formteils

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1125989B (de) * 1956-12-14 1962-03-22 Holmberg & Co Verfahren zum Umspritzen oder Umpressen elektrischer Anschlussaggregate, wie Stecker, Steckergehaeuse, Anschlussdosen u. dgl., die Anschlusskabel oder Zufuehrungslitzen aufweisen
DE3726515C1 (en) * 1987-08-08 1988-08-04 Kostal Leopold Gmbh & Co Kg Electrical plug connecting part
DE3942511C1 (enrdf_load_stackoverflow) * 1989-12-22 1991-01-10 Richard Hirschmann Ges.M.B.H., Rankweil, At

Also Published As

Publication number Publication date
EP0505745A3 (en) 1992-11-25
DE4110383C1 (enrdf_load_stackoverflow) 1992-05-21
EP0505745A2 (de) 1992-09-30
DE59201112D1 (de) 1995-02-16
ATE116766T1 (de) 1995-01-15

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