Injection mold having a buffer region

Details Injection mold having a buffer region Injection mold having a buffer region

2009-06-30

2010-12-28

Heitbrink, Tim (Department: 1791)

Plastic article or earthenware shaping or treating: apparatus

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

With coupling between charger and mold

C264S328800, C264S328120

Reexamination Certificate

active

07857615

ABSTRACT:
An injection mold has a plurality of cavities and a runner system for injecting material into the cavities. The runner system includes a main-runner and a sub-runner. The sub-runner interconnects the main-runner and the cavities. The sub-runner includes a first runner and a pair of second runners. The first runner connects the main-runner, and the second runners respectively connects ends of the first runner. A buffer rejoin is formed around a joint of the first runner and each second runner for mixing material when the material flows from the first runner into the second runners to make the material have a symmetric speed distribution in the second runners.

REFERENCES:
patent: 5518389 (1996-05-01), Nonomura et al.
patent: 7614872 (2009-11-01), Olaru et al.
patent: 7621739 (2009-11-01), Tilton et al.
patent: 7666335 (2010-02-01), Beaumont
patent: 2004/0214371 (2004-10-01), Mahmood

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