Air exhaust mold plunger

Plastic article or earthenware shaping or treating: apparatus – Distinct means to feed – support or manipulate preform stock... – Female mold type means

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Details

425544, 425546, 425812, 425DIG228, 26427217, 249141, B29C 4502, B29C 4534

Patent

active

056268874

ABSTRACT:
A plunger (22), used in a standard mold, has a vent seal device (23) and spring (24) that evacuates air through an exhaust port 26a, and channels 26 and 26b from the mold prior to moving the mold compound into the runner 27.

REFERENCES:
patent: 4431047 (1984-02-01), Takeshima et al.
patent: 4714423 (1987-12-01), Hattori et al.
patent: 5082615 (1992-01-01), Sakai
patent: 5336272 (1994-08-01), Tsutsumi et al.
patent: 5435953 (1995-07-01), Osada et al.
patent: 5460502 (1995-10-01), Majercak

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