Screw in-line type injection molding method and apparatus for lo

Details Screw in-line type injection molding method and apparatus for lo Screw in-line type injection molding method and apparatus for lo

1982-06-09

1984-03-06

Pavelko, Thomas P.

Plastic article or earthenware shaping or treating: apparatus

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

Feed control of material en route to shaping area

425147, 26432813, B29F 106

Patent

active

044351429

ABSTRACT:
A low-pressure screw in-line type injection molding method and apparatus for use with materials such as urea mixed resin powder are disclosed. The initial injection is performed at a converted injection pressure in the range of 250-700 Kg/cm.sup.2 and at an injection velocity in the range of 30-50 mm/sec. When the mold cavity has become nearly completely filled, the converted injection pressure is lowered to 50-200 Kg/cm.sup.2 for the completion of the injection cycle under low pressure conditions.

REFERENCES:
patent: 3876736 (1975-04-01), Takiura
patent: 3904078 (1975-09-01), Neff
patent: 3924994 (1975-12-01), Aoki
patent: 3941534 (1976-03-01), Hunkar

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