Apparatus for fabricating plastic parts

Details Apparatus for fabricating plastic parts Apparatus for fabricating plastic parts

1983-12-01

1986-06-03

Hoag, Willard E.

Plastic article or earthenware shaping or treating: apparatus

Control means responsive to or actuated by means sensing or...

Temperature control

425562, 425564, 425568, 425569, 425570, B29C 4522, B29C 4578

Patent

active

045927111

ABSTRACT:
Apparatus for injection molding plastic parts. The method includes the step of melting and pressurizing plastic material, directing the molten pressurized plastic material into passages leading to a mold, a selectively opening shut-off valve disposed along the passages, selectively closing the shut-off valve after a predetermined amount of molten pressurized plastic material has entered the mold and cooling the predetermined amount of molten pressurized plastic material in the mold to form a part. The apparatus includes an extruder providing pressurized molten plastic material, a mold adjacent the extruder, passages interconnecting the extruder with the mold, and a selectively operable shut-off valve disposed along the passage.

REFERENCES:
patent: 2536836 (1951-01-01), Bowling
patent: 3561062 (1971-02-01), Goron
patent: 3849048 (1974-11-01), Bielfeldt
patent: 3870445 (1975-03-01), Hold et al.
patent: 4279582 (1981-07-01), Orsuna-Diaz
patent: 4330258 (1982-05-01), Gellert
patent: 4332530 (1984-02-01), Marcinek
patent: 4332545 (1982-06-01), Cargile
patent: 4378963 (1983-04-01), Schouenberg
patent: 4380426 (1983-04-01), Wiles
patent: 4411609 (1983-10-01), Yoshii et al.
patent: 4435147 (1984-03-01), Myers et al.

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