Injection mold having a vented core

Details Injection mold having a vented core Injection mold having a vented core

1993-09-20

1994-08-09

Heitbrink, Tim

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

With product ejector

264334, 2643288, 26432812, 425570, 425573, 425812, B29C 4522

Patent

active

053360788

ABSTRACT:
The present invention relates to an apparatus for injection molding a thin-walled plastic article with substantially equal thickness sidewalls, a base portion, and a lip portion. The apparatus includes a two part mold arrangement in which a first part defines has a mold cavity and a second part defines a mold core. The first and second mold parts in a mold closed position define a mold space in the shape of the article being molded. The apparatus further includes two or more gates adjacent a lip portion of the mold space for injecting molten plastic material into the mold space and a bottom center venting arrangement. The apparatus further includes a restriction in the mold space for improving the operation of the bottom center venting arrangement and providing a more balanced filling in a multi-cavity molding machine.

REFERENCES:
patent: 5145630 (1992-09-01), Schad

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