Mold assembly with flexible membrane

Details Mold assembly with flexible membrane Mold assembly with flexible membrane

1992-01-03

1994-01-04

Heitbrink, Tim

Plastic article or earthenware shaping or treating: apparatus

Distinct means to feed, support or manipulate preform stock...

Female mold type means

249127, 249183, 264313, 425DIG44, B29C 4514

Patent

active

052755479

ABSTRACT:
A mold assembly (10) for injection molding material including a mold base (12), a clamping plate (14) and a flexible membrane (16). The flexible membrane has a retainer portion (29) engaged within a groove (28) in the mold base, and secured in position clamped intermediate the clamping plate and mold base. The clamping plate and membrane form a mold cavity (54) having a desired configuration for forming the molding material injected into the mold assembly (10). The mold base (12) and flexible membrane (16) form a pressure cavity (56) which is supplied with fluid during the injection of molding material into the mold assembly, to support the flexible membrane (16) in the desired position.

REFERENCES:
patent: 4449904 (1984-05-01), Austen et al.
patent: 4482515 (1984-11-01), Buhler et al.
patent: 4576776 (1986-03-01), Anderson
patent: 4588368 (1986-05-01), Buhler et al.
patent: 4704082 (1987-11-01), Buhler et al.
patent: 4889668 (1989-12-01), Kemp
patent: 5087193 (1992-02-01), Herbert

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