Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Shaping against forming surface
Patent
1978-04-25
1980-11-18
Parrish, John A.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Shaping against forming surface
264333, B28B 124
Patent
active
042345340
ABSTRACT:
A plurality of moulds each including a side frame and a hollow bed overlying the side frame are vertically stacked with sealing members interposed between the beds and the side frames for hermetically sealing the moulds. While the pressure in the moulds is being reduced a hydraulic substance such as cememt is poured into the moulds. The poured hydraulic substance is heat cured to produce solid articles releasable from the moulds. An empty mould is added to one side of the stack while a mould containing the cured substance is removed from the other side of the stack. Alternatively, the process can be carried out according to a batch system. The moulds may be packed with aggregate, fittings or means for interconnecting the articles.
REFERENCES:
patent: 1332457 (1920-03-01), Burkhardt
patent: 3257338 (1968-06-01), Sefton et al.
patent: 3875278 (1975-04-01), Brandt
Ito Yasuro
Kaga Hideharu
Sumita Tadayuki
Yamamoto Yasuhiro
Ito Yasuro
Parrish John A.
Taisei Corporation
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