Patent Application
20100025564
1. Field of the Invention
This present invention relates to an insert fastening apparatus, and more specifically to an insert fastening apparatus adapted to an insert molding mold.
2. The Related Art
Conventionally, in insert molding field, an insert fastening apparatus is used to fasten an insert and is placed on one side of a mold, a part of the insert is inserted into a mold cavity which is defined in the mold. When liquid plastic is injected into the mold cavity and become cold, the plastic and the insert are integrated with each other to form an expected product.
In order to manufacture a connector via an injecting mold, a plurality of terminals are fixed by an insert fastening apparatus fixed in the injecting mold, and parts of the terminals are arranged into a cavity formed in the injecting mold. When liquid plastic is injected into the cavity, the liquid plastic is easy to leak out from a gap formed between the terminals and the insert fastening apparatus, and some burrs are formed in surfaces of the expected connector.
An object of the invention is to provide an insert fastening apparatus adapted to fix an insert into an insert molding mold. The insert fastening apparatus includes an upper module and a lower module. The upper module has an upper mating surface. The lower module has a lower mating surface matching the upper mating surface, at least one fastening groove is defined between the lower mating surface and the upper mating surface to fix a portion of the insert.
The upper mating surface smoothly contacts the lower mating surface in a sealing engagement with the portion of the insert fixed in the fastening groove, therefore, the upper module and the lower module are not easy to be abraded and to form gaps therebetween, so burrs will not be formed on a surface of the expected product during liquid plastic injecting.
The invention, together with its objects and the advantages thereof may be best understood by reference to the following description taken in conjunction with the accompanying drawings, in which:
First referring to
Please referring to
Referring to
As shown in
In inserting manufacture, firstly, the upper module 11 is separated with the lower module 12, the terminals 21 are arranged in the fastening grooves 124, front portions of the terminals 21 are placed in the cavity, the connecting portion 22 is located outside the upper module 11 and the lower module 12. Then, the upper module 11 and the lower module 12 are engaged with each other. Liquid plastic flows into the cavity to form a housing 3 integrated with the terminals 21, the upper mating surface 113 of the upper module 11 smoothly contacts the lower mating surface 121 of the lower module 12 in a sealing engagement with the terminals 21 fixed in the in the fastening grooves 124.
In practice, the guiding groove 123 and the fastening groove 124 can be changed to conform the shape of the terminal 21, and the amount of the guiding grooves 123 and the fastening grooves 124 match the amount of the terminals 21. The fastening grooves 124 can be arranged between the upper module 11 and the lower module 12, or in the upper module 11 only, or in the lower module 12 only.
As above description, the upper mating surface 113 smoothly contacts the lower mating surface 121 in a plane, the upper module 11 and the lower module 12 are not easy to be abraded and then form gaps therebetween, so burrs will not be formed in surfaces of the expected product.
An embodiment of the present invention has been discussed in detail. However, this embodiment is merely a specific example for clarifying the technical contents of the present invention and the present invention is not to be construed in a restricted sense as limited to this specific example. Thus, the spirit and scope of the present invention are limited only by the appended claims.
