Plastic article or earthenware shaping or treating: apparatus – Press forming apparatus having opposed press members – Male shaping member and female mold
Patent
1981-06-08
1983-07-26
Derrington, James H.
Plastic article or earthenware shaping or treating: apparatus
Press forming apparatus having opposed press members
Male shaping member and female mold
264312, 425418, 425427, 425457, 425469, B28B 2192
Patent
active
043952208
ABSTRACT:
This invention relates to an apparatus and a process for forming building blocks by consolidating a mixture of cement and fibrous material. The process involves placing a charge of the mixture into a mold, compressing the mixture within the mold, inserting rotors into the mixture within the mold to consolidate and displace the mixture while forming hollow cores through the formed block, and removing the rotors from the formed block and the block from the mold. The apparatus includes a mold, a mold cover, means that apply pressure to the mold cover to compress the material placed within the mold rotors, means for spinning the rotors as they are lowered into and raised from the mixture by raising and lowering means. The block is formed on a removable pallet resting on lips within the mold. The pallet defines apertures substantially aligned with the rotors; the apertures allow for release of pressure when the rotors are withdrawn from the formed block. The rotors are uniquely configured to properly compact and displace the mixture and to form smooth hollow cores through the block.
REFERENCES:
patent: D262219 (1981-12-01), Lassiter
patent: 1702812 (1929-02-01), Cochran
patent: 3003224 (1961-10-01), Ribich
patent: 3149534 (1964-09-01), Stephens
patent: 3521525 (1970-07-01), Williamson
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