Process and machine for over-molding connectors on electrical conductors
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B29D-003/00
B29C-001/00
출원번호
US-0247276
(1981-03-25)
우선권정보
FR-0007185 (1980-03-31)
발명자
/ 주소
Prus, Henryk
대리인 / 주소
Kirschstein, Kirschstein, Ottinger & Cobrin
인용정보
피인용 횟수 :
7인용 특허 :
3
초록▼
For over-molding a thermo-plastic material on a connector, the connector is, at the outlet of the machine having crimped the connector on a conductor, carried into a gripper maintaining the connector when introducting a core mounted on a conveyor. The connector is then carried into an injection mold
For over-molding a thermo-plastic material on a connector, the connector is, at the outlet of the machine having crimped the connector on a conductor, carried into a gripper maintaining the connector when introducting a core mounted on a conveyor. The connector is then carried into an injection mold from which it is extracted before complete cooling, to be carried to a cooling station comprising a mold similar to that of the injection mold but being at a lower temperature.
대표청구항▼
1. A process for over-molding connectors with a thermoplastic material, said connectors being previously positioned on tip ends of electrical conductors, wherein said over-molding is carried out in an injection press having a first injection mold into which is introduced the connector affixed to its
1. A process for over-molding connectors with a thermoplastic material, said connectors being previously positioned on tip ends of electrical conductors, wherein said over-molding is carried out in an injection press having a first injection mold into which is introduced the connector affixed to its conductor to produce an over-molded connector by injection molding, wherein the over-molded connector is extracted from the first cavity mold at a temperature at which the thermoplastic material is still hot and wherein the over-molded connector is transferred into a second mold of a second press which is of exactly the shape of the injection mold, said second mold being maintained at a temperature lower than that of the first injection mold of the injection press and less than that at which it would be possible to make an injection molding of the thermoplastic material, the transferring of the over-molded connector from the first injection mold of the injection press to the second mold of the second press being sufficiently rapid to prevent a substantial deformation of the thermoplastic material which is still not solidified, the thermoplastic material being then re-molded in the mold of the second press. 2. A process according to claim 1, wherein the step of carrying the connectors to the injection press is provided directly at the discharge end of a machine crimping the connectors on the stripped end of the conductors. 3. A process as set forth in claim 1 wherein the second mold of the second press is refrigerated when the over-molded connector is transferred thereto from the first injection mold of the injection press. 4. A machine for the over-molding of a thermoplastic material on connectors crimped on the stripped end of conductors in a crimping machine, said overmolding machine comprising a conveyor extending from the crimping machine, which conveyor carries the connectors to a first station, mean at the first station to position a core at portions of the connector which have to be protected from over-molding and then carries the connectors to a second station, said second station comprising an injection press having a first injection mold into which the connector affixed to its conductor and associated with a core is introduced, the injection press being maintained at a suitably high temperature to enable introduction therein of an over-molding thermoplastic material to produce an over-molded connector by injection molding, said first injection mold opening while the injected material still is hot and not yet solidified, and said over-molded connector being extracted from the opened first injection mold and transferred to a third station comprising a press including a second mold which is of exactly the shape of the injection mold, said second mold being maintained at a temperature lower than that of the first injection mold of the injection press and less than that at which it would be possible to make an injection molding of the thermoplatic material, the transferring of the over-molded connector from the first injection mold of the injection press to the second mold of the second press being sufficiently rapid to prevent a substantial deformation of the thermoplastic material which is still not solidified, the thermoplastic material then being re-molded in the mold of the second press. 5. A machine as set forth in claim 4 wherein means is included to refrigerate the molding tools at the third station. 6. A machine according to claim 4, wherein said presses are placed between two conveyors, one of which extending from the crimping machine and the other one being provided with guiding supports for the cores introduced at the portions of the connectors to be protected. 7. A machine according to claim 6, wherein the conveyor carrying the cores is an endless conveyor whose supports for the cores are spaced apart by a distance equal to advancement step of said conveyors, said step corresponding to distance between the working stations. 8. A machine according to claim 6, wherein the conveyor bringing the conductors on which are crimped the connectors is a discharge conveyor of the crimping machine for the connectors. 9. A machine according to claim 6, comprising synchronizing means established between the conveyor bringing the conductors provided with their connector and the conveyor carrying the mandrels and the cores.
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