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
1986-07-25
1989-08-22
Thurlow, Jeffery
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
264255, 2642791, B29C 4320
Patent
active
048593958
ABSTRACT:
A staged mold and method for stabilizing hazardous wastes for final disposal by molding an agglomerate of the hazardous wastes and encapsulating the agglomerate. Three stages are employed in the process. In the first stage, a first mold body is positioned on a first mold base, a mixture of the hazardous wastes and a thermosetting plastic is loaded into the mold, the mixture is mechanically compressed, heat is applied to cure the mixture to form a rigid agglomerate, and the first mold body is removed leaving the agglomerate sitting on the first mold base. In the second stage, a clamshell second mold body is positioned around the agglomerate and the first mold base, a powdered thermoplastic resin is poured on top of the agglomerate and in the gap between the sides of the agglomerate and the second mold body, the thermoplastic is compressed, heat is applied to melt the thermoplastic, and the plastic is cooled jacketing the agglomerate on the top and sides. In the third stage, the mold with the jacketed agglomerate is inverted, the first mold base is removed exposing the former bottom of the agglomerate, powdered thermoplastic is poured over the former bottom, the first mold base is replaced to compress the thermoplastic, heat is applied to melt the new thermoplastic and the top part of the jacket on the sides, the plastic is cooled jacketing the bottom and fusing with the jacketing on the sides to complete the seamless encapsulation of the agglomerate.
REFERENCES:
patent: 1930167 (1933-10-01), Goodwin
patent: 2940128 (1960-06-01), Bowerman et al.
patent: 3330088 (1967-07-01), Dunlea, Jr.
patent: 3451185 (1969-06-01), Tezuka
patent: 4234632 (1980-11-01), Lubowitz
Lubowitz Hyman R.
Telles Rodney W.
Unger Samuel L.
Environmental Protection Polymers, Inc.
Tentoni Leo B.
Thurlow Jeffery
Tyson Timothy T.
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