Metal founding – Process – With measuring – testing – inspecting – or condition determination
Patent
1993-03-09
1994-04-05
Batten, Jr., J. Reed
Metal founding
Process
With measuring, testing, inspecting, or condition determination
164113, 164312, 1641553, 1641541, B22D 1732
Patent
active
052996263
ABSTRACT:
An injection speed control valve for controlling the speed of flow of operating fluid from an operating fluid source of the die-casting machine to an injection cylinder, a pressure compensation valve for controlling the pressure of the operating fluid to a predetermined differential valve pressure to be coupled to the injection speed control valve, a bypass duct communicating the operating fluid source and the injection speed control valve, a logic valve for on-off controlling the flow of the operating fluid through the bypass duct, and a solenoid valve for on-off operating the logic valve, are provided. The speed of injection by the injection cylinder is controlled by switching the logic valve with the solenoid valve while maintaining a predetermined opening degree of the injection speed control valve.
REFERENCES:
patent: 4488589 (1984-12-01), Moore et al.
patent: 4559991 (1985-12-01), Motomura et al.
patent: 4610831 (1986-09-01), Mihara
patent: 4660620 (1987-04-01), Ozeki
patent: 4884621 (1989-12-01), Ban et al.
patent: 5207267 (1993-05-01), Iwamoto et al.
Batten, Jr. J. Reed
Toshiba Kikai Kabushiki Kaisha
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