EP3579344A1 - Procédé de surmoulage de cosses de câble à géométries complexes - Google Patents

Procédé de surmoulage de cosses de câble à géométries complexes Download PDF

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Publication number
EP3579344A1
EP3579344A1 EP18176446.5A EP18176446A EP3579344A1 EP 3579344 A1 EP3579344 A1 EP 3579344A1 EP 18176446 A EP18176446 A EP 18176446A EP 3579344 A1 EP3579344 A1 EP 3579344A1
Authority
EP
European Patent Office
Prior art keywords
cable lug
encapsulation
soft plastic
lug
cable
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Withdrawn
Application number
EP18176446.5A
Other languages
German (de)
English (en)
Inventor
Ramesh Kumar Selvasankar
Georg Langmann
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.)
Gebauer and Griller Kabelwerke GmbH
Original Assignee
Gebauer and Griller Kabelwerke 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 Gebauer and Griller Kabelwerke GmbH filed Critical Gebauer and Griller Kabelwerke GmbH
Priority to EP18176446.5A priority Critical patent/EP3579344A1/fr
Publication of EP3579344A1 publication Critical patent/EP3579344A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/70—Insulation of connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
    • H01R11/12—End pieces terminating in an eye, hook, or fork

Definitions

  • the invention relates to a method for producing cable lugs with encapsulation and a cable lug with encapsulation.
  • cable lugs are devices that allow electrical connection of cables or strands by screwing or plugging.
  • the cable lug has at one end a region for fixing a cable and at the other end it comprises a contact point.
  • the cable shoes for pressing and those for crimping.
  • To insulate the cable lug it can be overmolded between its two ends.
  • One possibility is to first bend a finished shaped cable lug into the required geometry. At this step, the encapsulation of the previously bent cable lug takes place. In this process, a hard plastic is used for the extrusion coating.
  • a disadvantage of this manufacturing method is that the cable lug is first bent and then overmolded, so there may be deviations from the predetermined tolerances due to bending and extrusion coating, but this can not be compensated afterwards by bending.
  • a bending of the cable lug by more than 90 ° after the encapsulation is not possible because of the nature of the material, since there is a material overstretching due to the forces acting on the hard plastic forces, causing the hard plastic ruptures or breaks.
  • the encapsulation of the cable lug is usually produced using an injection molding process.
  • Another possibility for producing cable lugs with corrosion or contact protection or water resistance is by using a heat-shrinkable tube.
  • the shrink tube is pulled over the cable lug and heated, causing the material of the hose, contracts and thus completely adjoining the cable lug.
  • the cable lug should be as straight as possible, since in a strong bend of the cable lug of the shrink tube there is often no longer located directly on the lug fitting, creating cavities.
  • the production of the cable lug should make it possible to manufacture a contact and corrosion protection and to provide water resistance, wherein the resulting from the process cable lug with overmolding can also be formed in complex geometries.
  • the object of the invention is also achieved by a cable lug with an overmolding of soft plastic.
  • a cable lug according to the invention is usually made of a conductive material, in particular a metal.
  • An encapsulation of the cable lug can basically be done with all types of plastic. According to the invention, it is provided that the encapsulation takes place with a soft plastic.
  • Soft plastic or soft plastic refers to plastics with particular flexibility, i. Elastomers such as EPDM, silicone or thermoplastic elastomers.
  • soft plastic makes it possible, on the one hand, to reverse the method steps compared with the prior art, so that initially a molding of the cable lug with a soft plastic can take place, and only thereafter the bending of the over-molded cable lug.
  • a hard plastic can no longer be bent after encapsulation because it would tear because of its material properties.
  • the use of a soft plastic for the encapsulation of the cable lug makes it possible to realize bending angles of -90 ° to 90 ° and over 90 °, since a soft plastic is more elastic and tear-resistant than a hard plastic because of its material properties.
  • a soft plastic is more elastic and tear-resistant than a hard plastic because of its material properties.
  • the encapsulation of the cable lug takes place by injection molding.
  • the injection molding process enables a rapid, cost-effective and numerous production of the cable lugs with encapsulation.
  • the method according to the invention makes it easier to comply with the tolerance ranges relating to the bending angle.
  • the two process steps namely that is first encapsulated and then bent
  • the complete diameter of the cable lug with encapsulation already exists during bending of the cable lug, so that the bending takes place together with it, whereby the compliance of the bending angle is facilitated because deviations can be taken into account in the thickness or other parameters in the process of extrusion coating during the bending process.
  • an adhesive / primer is applied to the cable lug or the surface of the cable lug is treated with plasma in one embodiment before the extrusion in step a.
  • Using an adhesive / primer or pretreatment with plasma has the advantage that the soft plastic used to encapsulate the cable lug better adheres to the metal of the cable lug and thus guarantees better contact or corrosion protection or water resistance.
  • the soft plastic is a thermoplastic.
  • Thermoplastic plastics have the property that they can be deformed arbitrarily within a certain temperature range.
  • the soft plastic is an elastomer.
  • the soft plastic is a thermoplastic elastomer, in particular for applications up to 100 ° C.
  • thermoplastic elastomer also has elastic properties in addition to its thermoplastic properties. This means that the elastomer undergoes deformation under tensile or compressive loading, but returns to its original undeformed shape when the load is released. This property is advantageous according to the invention, since a tear-resistant elastomer allows bending into complex geometries.
  • the soft plastic is an EPDM (ethylene-propylene-diene rubber), in particular for applications up to 150 ° C.
  • EPDM ethylene-propylene-diene rubber
  • the advantage of this synthetic rubber compound is that it has high thermal resistance.
  • EPDM is highly elastic and tear-resistant, which is particularly advantageous for cable lugs, which have a bending angle of over 90 ° and / or are used in areas of high or low ambient temperature.
  • the soft plastic is a silicone.
  • the application of this cable lug according to the invention is in particular in areas where absolute watertightness is required, but it goes without saying that the application is not limited to this. Silicon is used in particular for applications above 150 ° C.
  • the soft plastic has a Shore A hardness between 40 and 90, preferably between 40 and 70.
  • a Shore A hardness between 60 and 80 indicates the most suitable elastic nature of the soft plastic so as to allow bending of the cable lug into the required geometry.
  • the Shore A hardness of the soft plastic between 40 and 70 since these soft plastics have the best properties in terms of material hardness for producing a cable lug with overmolding of soft plastic.
  • the over-molded cable lug is bent at an angle of -90 ° to + 90 ° or over 90 °.
  • the overmolded cable lug can be bent by more than 5 °, 10 °, 20 °, 30 °, 40 °, 50 °, 60 °, 70 °, 80 ° or even more than 90 °.
  • the advantage is that due to the flexibility of the soft plastic, bending of the cable lug after encapsulation with this soft plastic is also possible by more than 90 °.
  • this overmolded cable lug Due to the possibility of strong bending of this overmolded cable lug, it is also possible to apply it in areas in which no overmolded cable lug could hitherto be used, since it was not possible to produce an overmolded cable lug with required tightness using the methods known in the prior art are to manufacture. In particular, it allows the use of the cable lug in areas where absolute watertightness is required.
  • the overmolded cable lug is made of a copper alloy.
  • the cable lug is made of a different metallic conductor.
  • a cable lug is obtained by the described method, wherein it is made possible by the inventive method to realize complex geometries of the cable lug.
  • a cable lug 1 without encapsulation 6 shown in the schematic representation of Fig. 1 .
  • the cable lug 1 has two ends. The one end is formed as a loop-shaped pad 2 for conductive connection with another object.
  • the other end of the cable lug 1 has a fork-shaped attachment point 3, to which a line can be fastened on.
  • a planar line section 4 extends, which is here plate-shaped or band-shaped.
  • the line section 4 is angled in the area in front of the fork-shaped attachment point 3 by an angle 5 of 90 °.
  • Fig. 2 In the schematic representation of Fig. 2 is the same cable lug 1 as in Fig. 1 shown, but after overmolding 6 with a soft plastic.
  • Fig. 3 In the schematic representation of Fig. 3 is the cable lug 1 with encapsulation 6 off Fig. 2 shown after the bending process.
  • the planar line section 4, around which the encapsulation 6 is arranged directly adjacent, has a bending angle 7 of 90 °.
  • a first section 8 of the planar line section 4 and the eye-shaped contact point 2 are thus normal to a second section 9 of the planar line section 4 and the fork-shaped attachment point.
  • Fig. 4 In the schematic representation of Fig. 4 is the same cable lug 1 with encapsulation 5 from the Fig. 3 shown.
  • the fork-shaped attachment point 3 is connected by pressing and soldering with a line 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
EP18176446.5A 2018-06-07 2018-06-07 Procédé de surmoulage de cosses de câble à géométries complexes Withdrawn EP3579344A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP18176446.5A EP3579344A1 (fr) 2018-06-07 2018-06-07 Procédé de surmoulage de cosses de câble à géométries complexes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18176446.5A EP3579344A1 (fr) 2018-06-07 2018-06-07 Procédé de surmoulage de cosses de câble à géométries complexes

Publications (1)

Publication Number Publication Date
EP3579344A1 true EP3579344A1 (fr) 2019-12-11

Family

ID=62563057

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18176446.5A Withdrawn EP3579344A1 (fr) 2018-06-07 2018-06-07 Procédé de surmoulage de cosses de câble à géométries complexes

Country Status (1)

Country Link
EP (1) EP3579344A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008003332A1 (de) * 2008-01-07 2009-07-16 Auto-Kabel Management Gmbh Formstabiler Kabelstrang für die Motorraumverkabelung
DE202012008242U1 (de) * 2012-02-26 2012-11-09 Kromberg & Schubert Kg Verbindung eines ersten metallischen Bauteils mit einemumhüllten zweiten metallischen Bauteil
US20130068495A1 (en) * 2011-09-19 2013-03-21 Rod Hadi Flexible busbar
DE112012005149T5 (de) * 2011-12-08 2014-10-16 Autonetworks Technologies, Ltd. Elektrokabel mit Kabelschuh und Herstellungsverfahren
EP2899810A1 (fr) * 2014-01-24 2015-07-29 Intercable GmbH Cosse
DE102014011180A1 (de) * 2014-07-31 2016-02-04 Auto-Kabel Management Gmbh Elektrischer Flachleiter für Kraftfahrzeuge

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008003332A1 (de) * 2008-01-07 2009-07-16 Auto-Kabel Management Gmbh Formstabiler Kabelstrang für die Motorraumverkabelung
US20130068495A1 (en) * 2011-09-19 2013-03-21 Rod Hadi Flexible busbar
DE112012005149T5 (de) * 2011-12-08 2014-10-16 Autonetworks Technologies, Ltd. Elektrokabel mit Kabelschuh und Herstellungsverfahren
DE202012008242U1 (de) * 2012-02-26 2012-11-09 Kromberg & Schubert Kg Verbindung eines ersten metallischen Bauteils mit einemumhüllten zweiten metallischen Bauteil
EP2899810A1 (fr) * 2014-01-24 2015-07-29 Intercable GmbH Cosse
DE102014011180A1 (de) * 2014-07-31 2016-02-04 Auto-Kabel Management Gmbh Elektrischer Flachleiter für Kraftfahrzeuge

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