Plastic article or earthenware shaping or treating: apparatus – Means to create a vacuum or apply fluid pressure within a...
Patent
1984-12-14
1985-11-05
Hoag, Willard E.
Plastic article or earthenware shaping or treating: apparatus
Means to create a vacuum or apply fluid pressure within a...
425DIG60, B29G 100
Patent
active
045510857
ABSTRACT:
Apparatus is disclosed for compresseion molding a part from a charge having a curable resin therein. Provision is made for defining a vacuum chamber surrounding the mold cavity when the upper and lower dies are brought to a partially closed position. The vacuum chamber includes a vertically movable ring surrounding the upper die which is urged into sealing engagement with a surface surrounding the lower die. The ring has a wiper blade mounted in a position to contact the side wall of the upper die thereby permitting relative vertical movement between the ring and die. The mold cavity is rapidly evacuated and then the upper die is brought into a fully closed position while the resin cures.
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Epel Joseph N.
Wilkinson Robert E.
Hoag Willard E.
The Budd Company
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