Plastic article or earthenware shaping or treating: apparatus – Control means responsive to or actuated by means sensing or... – Molding pressure control means responsive to pressure at...
Patent
1986-03-21
1988-02-16
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
Control means responsive to or actuated by means sensing or...
Molding pressure control means responsive to pressure at...
425412, 425414, 425454, B28B 716
Patent
active
047252146
ABSTRACT:
Apparatus for forming a constructional block in which a lower die is filled with a given and at least substantially excess amount of material after substantially closing the lower die with an upper die for forming a mold by drawing the dies together, the material is highly compressed while, simultaneously with drawing them together under the action of a means for controlling and regulating its passage, in a first stage, the excess material is allowed to escape partly outwardly of the mold and, in a second stage, substantially before obtaining the desired dimension between the two faces of the block through the relative drawing together of the dies, the passage of the material escaping outwardly of the mold is stopped.
REFERENCES:
patent: 986701 (1911-03-01), Frerichs
patent: 2875499 (1959-03-01), Ross
Piazza Giovanni
Piazza Mario
Sturge Karl D.
Woo Jay H.
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