Mould for moulding an article

Details Mould for moulding an article Mould for moulding an article

1986-01-21

1988-08-30

Hoag, Willard E.

Plastic article or earthenware shaping or treating: apparatus

Means to create a vacuum or apply fluid pressure within a...

249141, 249161, 425420, 425441, 425812, 425DIG60, B29C 4336, B29C 4356

Patent

active

047673087

ABSTRACT:
A two-part mould for moulding an article has the mould parts adapted to be moved together under vacuum to cause moulding material to be evenly distributed around a reinforcement structure. Sealing means for sealing the mold cavity against ambient atmosphere, comprises a primary seal operative during the movement of the mould parts, the action of the primary seal being assisted by a secondary seal which becomes effective when the mould parts reach the final closed position. A collection chamber is formed in one of the mould parts for collection of surplus resin through pinch-off means, including a flexible part, which closes off flow of resin into the collection chamber in the closed position, of the mould parts. The collection chamber is preferably located to permit drainage of resin back to the mould cavity until the pinch-off means becomes effective.

REFERENCES:
patent: 2243835 (1941-06-01), Brunner et al.
patent: 2304461 (1942-12-01), Knowles
patent: 2627641 (1953-02-01), Steele et al.
patent: 2976571 (1961-03-01), Moslo
patent: 3193884 (1965-07-01), Haynie et al.
patent: 3266099 (1966-08-01), Bucy
patent: 3550212 (1970-12-01), Gray
patent: 3970732 (1976-07-01), Staats et al.
patent: 4153231 (1979-05-01), Hayakawa et al.
patent: 4315726 (1982-02-01), Semerdjiev et al.

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