Injection molding machines

Details Injection molding machines Injection molding machines

1978-02-10

1980-06-24

Hershkovitz, Abraham

Power plants

Pressure fluid source and motor

Pulsator

60416, 60563, 60593, 91 27, 91438, 92 85B, 164314, B60T 1300

Patent

active

042088798

ABSTRACT:
In an injection molding machine of the type comprising an injection cylinder, a feedback circuit for feeding back the oil in the rear chamber of the injection cylinder into the front chamber thereof and a booster cylinder, a pressure oil accumulator is connected to the booster cylinder through a valve for supplying pressurized oil for actuating the booster cylinder. A check valve is connected in parallel with the valve. When water hammer occurs at the end of the injection stroke the check valve opens to absorb the energy of water hammer by the accumulator.

REFERENCES:
patent: 1930155 (1933-10-01), Wiedmann
patent: 2030966 (1936-02-01), Crane
patent: 2994345 (1961-08-01), Strader
patent: 3068596 (1962-12-01), Hein
patent: 3596561 (1971-08-01), Keller
patent: 4066189 (1978-01-01), Toyoaki

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