Plastic article or earthenware shaping or treating: apparatus – Preform reshaping or resizing means: or vulcanizing means... – Including both heating and cooling means
Patent
1995-05-08
1996-06-25
Davis, Robert
Plastic article or earthenware shaping or treating: apparatus
Preform reshaping or resizing means: or vulcanizing means...
Including both heating and cooling means
156497, 425400, 425407, 425DIG119, B29C 3304, B29C 5142
Patent
active
055294790
ABSTRACT:
The molding apparatus includes a press (10) with a top mold (12) and a bottom mold (14). The top mold (12) has a die (32) with a contoured die surface (34) and gas passages (36). The bottom mold (14) has a die 44 with a contoured die surface (46). The die (44) is made from either a solid piece of material with gas passages or from a porous material. During operation of the molding apparatus, a workpiece (26) is placed in a mold cavity between the top mold and the bottom mold. The mold cavity (24) is closed to shape the workpiece. The workpiece is heated by hot gas supplied by a gas supply and recirculation system (52) when the diverter valves (68 and 70) are opened and gas flows from gas circulation fan 56 to the gas heater chamber (54) to the bottom mold (14), through the die 44, through the workpiece (26), through the die 32 and back to the inlet side of the gas circulation fan (56). When the workpiece (26) has been heated to the desired temperature for the required time, the diverter valves (68 and 70) are closed. When the diverter valves are closed, gas flows through the gas recirculation duct 62 from the gas heater chamber (54) to the inlet of the gas circulation fan (56). The mold cavity 24 is then opened and the workpiece (26) is removed and an unformed workpiece is placed in the mold cavity to repeat the cycle.
REFERENCES:
patent: 3359353 (1967-12-01), Oddi
patent: 3482281 (1969-12-01), Thiel
patent: 4162877 (1979-07-01), Nyberg
patent: 4263007 (1981-04-01), Battigelli et al.
patent: 4379101 (1983-04-01), Smith
patent: 4416071 (1983-11-01), Cunningham et al.
patent: 4462785 (1984-07-01), Smith
patent: 4689004 (1987-08-01), Kunkel
patent: 4786351 (1988-11-01), Elliott et al.
patent: 4850849 (1989-07-01), Hsu
patent: 4923555 (1990-05-01), Elliott et al.
patent: 5096409 (1992-03-01), Stofko
patent: 5108691 (1992-04-01), Elliott
Davidson Textron Inc.
Davis Robert
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