Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – To produce composite – plural part or multilayered article
Patent
1984-03-28
1986-05-27
Woo, Jay H.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
To produce composite, plural part or multilayered article
210540, 264256, 264298, 264317, B28B 116
Patent
active
045914745
ABSTRACT:
A method of forming a concrete member is provided which includes the following steps: in a mold structure having a plurality of lateral walls defining a cavity, introducing a liquid into the cavity to a predetermined level above a drainage conduit which leads to a weir having an upper edge which is higher than the liquid level; forming a layer of fusible material on the surface of the liquid, the fusible material being of lesser density than the liquid and having a melting point which is above the temperature of the liquid, by introducing molten fusible material into the cavity until the liquid begins to flow over the weir; after the fusible material has solidified, introducing a concrete mix into the cavity onto the fusible material; when the concrete mix is at least partially cured, establishing a flow of warm liquid into the cavity below the fusible material and over the weir, the warm liquid having a temperature above the melting point of the fusible material so that the fusible material is melted; draining the molten fusible material from the cavity; and draining the liquid from the cavity.
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Scott Harold H.
Scott Ralph K.
Columbia Fabricators
Housel James C.
Woo Jay H.
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