Plastic and nonmetallic article shaping or treating: processes – Treatment of material by vibrating – jarring – or agitating... – By reciprocating or vibrating mold
Patent
1975-05-14
1978-03-14
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Treatment of material by vibrating, jarring, or agitating...
By reciprocating or vibrating mold
264 87, 264335, 264336, B28B 110, B28B 712
Patent
active
040791084
ABSTRACT:
Reinforced cement panels are produced between a fixed lower mould and a movable upper mould each having a moulding surface covered with filter cloth. Suction is applied through ports in the lower mould to extract air and residual water, reinforcement is placed on the lower mould, a layer of slurry of uniform thickness is applied by traversing a depositor over the lower mould, and the upper mould is rested on the surface of the slurry. Vacuum is applied through arched connections from upper parts of manifolds on the upper mould and through passages in the upper mould to the filter cloth thereof to withdraw moisture from the slurry to create an uncured panel. Water-containing foam is admitted through the ports in the lower mould to release the uncured panel, whereupon the upper mould is raised with the uncured panel held thereto, traversed to a different position to rest the uncured panel on a support. Water-containing foam is then admitted through the arched connections of the upper mould to the filter cloth thereof to release it from the uncured panel. The upper mould is surrounded by clamping strips which seat on the slurry at the boundary of the mould and provide an impervious seal in this region.
REFERENCES:
patent: 2148084 (1939-02-01), Nock
patent: 2688175 (1954-09-01), Billner
patent: 2701904 (1955-02-01), Roensch
patent: 2754729 (1956-07-01), Emery
patent: 2964822 (1960-12-01), Tomkins
patent: 3477493 (1969-11-01), Charman, Jr. et al.
patent: 3655847 (1972-04-01), Morgan
patent: 3839521 (1974-10-01), Robinson
Fictor Pty. Ltd.
Silbaugh Jan H.
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