Pressure injection machine and method

Details Pressure injection machine and method Pressure injection machine and method

1976-08-27

1978-02-28

Husar, Francis S.

Plastic article or earthenware shaping or treating: apparatus

With control means responsive to independently operated timer

For timing mold filling means

425156, B29F 106

Patent

active

040764753

ABSTRACT:
A plastic injection machine injects at an initial higher pressure, with the opening of the injection nozzle valve being delayed to allow injection pressure to build up. When the mold is filled, the pressure applied by the machine is shifted to a low holding pressure which is maintained until the plastic beings to set up. A shouldered bronze thrust bearing transmits the high pressure from the hydraulic injection cylinders to the injection machine screw.

REFERENCES:
patent: 3436793 (1969-04-01), Trueblood
patent: 3741700 (1973-06-01), Hutchinson et al.

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