CONNECTOR AND METHOD FOR PRODUCING A CONNECTOR

Abstract

An aspect of the invention is directed to a method for producing a connector using injection-molding by providing at least one conductor and at least one contact pin which are electrically connected at a contact point, producing a thermoset premold from a thermoset using injection-molding, wherein the thermoset is injection-molded around at least a first section of the at least one conductor and/or around at least a second section of the at least one contact pin, and injection-molding of a thermoplast on the thermoset premold, wherein the step of injection-molding takes place before the thermoset premold has obtained a degree of curing of 90%. Another aspect of the invention is a connector comprising at least one conductor and at least one contact pin is disclosed.

Claims

1. A method for producing a connector using injection-molding, comprising: providing at least one conductor and at least one contact pin, wherein the at least one conductor and the at least one contact pin are electrically connected at a contact point; producing a thermoset premold from a thermoset material using injection-molding, wherein the thermoset material is injection-molded around at least one of a first section of the at least one conductor and a second section of the at least one contact pin; and injection-molding of a thermoplast on the thermoset premold, wherein injection-molding of the thermoplast occurs before the thermoset premold has obtained a degree of curing of about 90%.

2. The method of claim 1, wherein the thermoset premold is produced in a first injection-molding tool and the thermoplast is injection-molded around the thermoset premold in a second injection-molding tool, wherein the thermoset premold is removed from the first injection-molding tool.

3. The method of claim 1, wherein the injection-molding of the thermoplast is performed before the thermoset premold has reached a degree of curing of about 80%.

4. The method of claim 1, wherein the injection-molding of the thermoplast is performed after the thermoset premold has reached a degree of curing of about 40%.

5. The method of claim 1, wherein the injection-molding of the thermoplast is performed after the thermoset premold has reached a degree of curing of between about 57.5% and about 63.5%.

6. The method of claim 1, wherein the producing lasts at least about 8 seconds.

7. The method of claim 1, wherein the producing lasts not more than about 20 seconds.

8. The method of claim 1, wherein a time between the producing and a start of the injection molding of the thermoset is not more than about 30 seconds.

9. The method of claim 1, wherein the thermoset material is an epoxy resin.

10. The method of claim 1, wherein a material of the thermoplast is selected from the group consisting of a filled PA66, a PBT, a PA66 GF35, and a PBT GF30.

11. The method of claim 1, further comprising tempering or malleablizing following the injection-molding of the thermoplast.

12. A connector, comprising: at least one conductor; at least one contact pin, wherein the at least one conductor and the at least one contact pin are electrically connected at a contact point; a thermoset material, wherein at least one of a section of the at least one conductor and a section of the at least one contact pin is surrounded by the thermoset material applied via injection-molding; and a thermoplastic material, wherein the thermoplast material is injection-molded onto the thermoset material.

13. The connector of claim 12, wherein a degree of curing of the thermoset is less than about 95% when the thermoplastic material is injection molded.

14. The connector of claim 12, wherein a first degree of curing of the thermoset at a joint face between the thermoset and the thermoplast is at least substantially equal to a second degree of curing of the thermoset at a location which is internal to the thermoset.

15. The connector of claim 12, wherein the conductor comprises a plurality of wires.

16. The connector of claim 12, wherein the conductor is a stranded wire.

17. A method for to form a connector, comprising: electrically connecting at least one conductor and at least one contact pin at at least one contact point; premolding a thermoset material, wherein the thermoset material is injection-molded around at least one of a first section of the at least one conductor and a second section of the at least one contact pin; and injection-molding of a thermoplast on the thermoset premold, wherein injection-molding of the thermoplast occurs before the thermoset premold has obtained a degree of curing between about 20% and about 99%.

18. The method of claim 17, wherein the contact point a soldering point, a welding point, or a crimp connection.

19. The method of claim 17, wherein the thermoset material is an epoxy resin.

20. The method of claim 17, wherein the thermoplast material is PA66, a PBT, a PA66 GF35, and PBT GF30.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Exemplary embodiments are shown in the drawings and will be further explained in the following. The figures show:

[0050] FIG. 1 is an embodiment of a connector; and

[0051] FIG. 2 is an embodiment of a method for producing a connector.

DESCRIPTION OF EXEMPLARY EMBODIMENTS

[0052] FIG. 1 illustrates an embodiment of a connector 10 having a conductor 12 and a contact pin 14. The conductor 12 comprises a plurality of single wires 16 which extend from the non-conducting conductor sheath 18 within the connector 10. The side of the connector 10 exposing the contact pin 14 for connection to another electrical component is called connector side 29. In exemplary embodiments, a connector will have multiple contact pins each with a corresponding conductor.

[0053] The conductor 12 is electrically connected to the contact pin 14 at a contact point 20. The contact point 20 is provided as a soldering point or welding point. Other preferred embodiments can use a crimp-connection. The contact point 20 can also be obtained in other ways.

[0054] A first section of the conductor 12 and a second section of the contact pin 14 are embedded in a thermoset 22 via injection-molding. In this preferred embodiment all exposed single wires 16, a section of the single wires 16 within the conductor sheath 18, a section of the conductor sheath 18 and the contact point 20 are also surrounded by thermoset. The shape of the thermoset which results from injection-molding the thermoset around a section of the at least one conductor 12 and/or the section of the at least one contact pin 14 is called thermoset premold 24.

[0055] It is further noted that thermoset premold 24 can comprise a plurality of separate individual parts. Also, there are embodiments where the thermoset premold 24 does not surround the contact pin 14, the contact point 20 nor the exposed sections of the single wires 16. However, it is believed to be advantageous, for certain exemplary embodiments, from a process perspective, if the thermoset is injection-molded around the multiple elements as shown.

[0056] The thermoset 22 or the thermoset premold 24 receives a thermoplast 26 cover via injection-molding. While the thermoset 22 is very hard and stiff without any flexible properties when the production of the connector 10 is finished, the thermoplast 26 allows to provide flexible elements, for example a spring hook (not shown).

[0057] FIG. 1 illustrates five different joint faces between the different materials which are indicated with reference numerals 1 to 5. The joint faces are present between the following elements: 1) outside of conductor sheath 18 and thermoset 22, 2) inside of conductor sheath 18 and thermoset 22, 3) single wires 16 and thermoset 22, 4) contact pin 14 and thermoset 22, and 5) thermoset 22 and thermoplast 26.

[0058] The joint faces 1 and 2 will typically not provide a good sealing, since neither the neither thermoset 22 nor the thermoplast 26 have a fully tight bonding to the conductor sheath 18. However, a good sealing is provided at the joint face 3, since the thermoset 22 has a low viscosity during injection-molding and also has good adhesion or attachment characteristics on metal. In addition, the thermoset 22 can also be pulled into very small cavities due to capillary action.

[0059] At the joint face 4 a good sealing is given, because the thermoset 22 has good adhesion or attachment characteristics on metal. A good bonding between the thermoset 22 and the thermoplast 26 is present at joint face 5, because the thermoplast 26 is applied to the thermoset premold 24 before the thermoset premold 24 is fully cured. Furthermore, a degree of curing of the thermoset at a joint face between the thermoset and the thermoplast is at least substantially equal to the degree of curing of the thermoset at a location which is internal to the thermoset. The internal location of the thermoset can be at a distance from the joint face, that can depend on the configuration of the connector.

[0060] Therefore, there is substantially no possibility for humidity or liquids, indicated with big arrows 28, to enter the connector 10, advance within the connector 10 and reach the connector side 29. Therefore, electric components which are electrically connected to the connector 10 are protected, even if the connector 10 is subjected to environmental conditions.

[0061] For the shown embodiment of the connector 10 a first degree of curing of the thermoset 22 at the joint face 10, an exemplary location is indicated with reference numeral 30, between the thermoset 22 and the thermoplast 26 is at least substantially the same as a second degree of curing of the thermoset 22 at a location 32 which is at a distance from the joint face 5. Here, the location 32 is at a maximum distance from the joint face 5, because the joint face 5 surrounds the elements enclosed therein in the manner of a cylinder.

[0062] FIG. 2 illustrates a method for producing a connector 10 using injection-molding. The method starts with providing S10 at least one conductor 12 and at least one contact pin 14, which are electrically connected at a contact point 20. In a subsequent step S12 the thermoset premold 24 is produced from a thermoset 22 using injection-molding, wherein the thermoset 22 is applied around at least a first section of the at least one conductor 12 and/or at least a second section of the at least one contact pin 14.

[0063] A step of injection-molding S14 of a thermoplast 26 on the thermoset premold 24 follows. The step of injection-molding S14 takes place before the thermoset premold 24 has reached a degree of curing of 90%. Optionally, the step of injection-molding S14 can be followed by a step of annealing S16. Further preferred embodiments of the method 40 can be derived from the above explanations.

[0064] Ranges have been discussed and used within the forgoing description. One skilled in the art would understand that any sub-range within the stated range would be suitable, as would any number within the broad range, without deviating from the invention.

[0065] The foregoing description of the present invention has been presented for purposes of illustration and description. Furthermore, the description is not intended to limit the invention to the form disclosed herein. Consequently, variations and modifications commensurate with the above teachings, and the skill or knowledge of the relevant art, are within the scope of the present invention. The embodiment described hereinabove is further intended to explain the best mode known for practicing the invention and to enable others skilled in the art to utilize the invention in such, or other, embodiments and with various modifications required by the particular applications or uses of the present invention. It is intended that the appended claims be construed to include alternative embodiments to the extent permitted by the prior art.