Apparatus for reducing waste in a plastic mold

Details Apparatus for reducing waste in a plastic mold Apparatus for reducing waste in a plastic mold

1986-05-05

1987-07-28

Hart, Charles

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

249160, 264327, 264DIG60, 425435, 425441, 425470, 4254519, B29C 3900

Patent

active

046830987

ABSTRACT:
Apparatus for reducing the waste area in a mold for an article molded from a heat-fusing material by a powdered vinyl process, has a mold box disposed adjacent the backside of a mold surface for controlling the temperature over respective first and second areas of the mold surface. The waste area elimination is accomplished by isolating and insulating the section of the mold defining the waste area. A kerf is cut into the mold around the waste area to isolate the area. The kerf is filled with castable silicone to insulate the waste area from the heated segments of the mold. To obtain the coating, the mold is filled with powdered vinyl and the excess material is removed from the mold by dumping the plastisol from the mold into a return tank.

REFERENCES:
patent: 4217325 (1980-08-01), Colby
patent: 4562025 (1985-12-01), Gray
patent: 4621995 (1986-11-01), Wensosky
patent: 4623503 (1986-11-01), Anestis et al.

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