Injection molding method and injection mold

Details Injection molding method and injection mold Injection molding method and injection mold

2006-12-12

2006-12-12

Del Sole, Joseph S. (Department: 1722)

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

Making hole or aperture in article

C264S161000, C264S328700

Reexamination Certificate

active

07147814

ABSTRACT:
An injection molding method and an injection mold used therefor are provided, in which a molded product free from burrs, whitening and gate marks can be obtained with a simple structure mold, and it can adequately serve the needs for multicavity molding as well. In the injection molding method, molten resin material is introduced and charged into a resin reservoir and a molding cavity of an injection mold, where a depth of the resin reservoir is larger than a thickness of a communicating portion. A cut punch is moved, when a portion of the resin material in the resin reservoir is still molten, to push the molten resin in the resin reservoir back from a gate into a runner so that the cut punch not only closes the communicating portion but also cuts a resin solidified portion in the resin reservoir away from a resin molded product in the molding cavity at the communicating portion.

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