Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under... – Molding of thermosetting or cross-linking stock
Patent
1980-02-05
1981-09-22
Pavelko, Thomas P.
Plastic article or earthenware shaping or treating: apparatus
Female mold and charger to supply fluent stock under...
Molding of thermosetting or cross-linking stock
2643287, 425548, 425549, 425572, 425590, B29F 108, B29G 300
Patent
active
042907446
ABSTRACT:
An improved molding apparatus for injection-compression molding thermosetting materials is described. The apparatus comprises a stationary platen assembly, a moveable platen assembly and a feed nozzle assembly.
The stationary assembly is comprised of a stationary platen member, a heated plate mounted on the support plate and a plurality of mold faces mounted on the heat plate.
The movable assembly is comprised of a moveable platen member, a heated plate mounted thereon and a plurality of mold faces mounted on the heat plate aligned with the mold faces on the stationary assembly.
The feed, or injection, nozzle assembly is comprised of a cylindrical nozzle member, having an internal temperature controlling means, and a plurality of feed outlets positioned on the periphery. The temperature maintained in the nozzle member is sufficiently high to maintain the thermosetting molding material within the nozzle member in a plasticized state and sufficiently low that no substantial curing or setting-up of the thermosetting molding material within the nozzle member in a plasticized state and sufficiently low that no substantial curing or setting-up of the thermosetting molding material takes place.
REFERENCES:
patent: 3632729 (1972-01-01), Bielfeldt
patent: 3787159 (1974-01-01), Bielfeldt
patent: 3797984 (1974-03-01), Yago
patent: 3819312 (1974-06-01), Arpajian
patent: 4017242 (1977-04-01), Mercer
Bainbridge Robert W.
Dannels W. Andrew
Hooker Chemicals & Plastics Corp.
Mudd James F.
Pavelko Thomas P.
Stein David A.
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