Programmable hydraulic power controls for injection molding mach

Details Programmable hydraulic power controls for injection molding mach Programmable hydraulic power controls for injection molding mach

1976-06-28

1977-05-03

Geoghegan, Edgar W.

Power plants

Pressure fluid source and motor

Condition responsive control of pump or motor displacement

60DIG2, 60DIG10, F16H 3946

Patent

active

040206335

ABSTRACT:
Programmable hydraulic power controls for an injection molding machine having a proportional-response flow control valve arranged in the main supply line of a variable delivery pump and a feedback line with a control diaphragm linking a point on the supply line behind the flow control valve with the pump control member, and a proportional-response pressure control valve in a branch line to the feedback line, each valve being controlled by a proportional-force electromagnet with a position transducer and electronic feedback loop for position verification in accordance with a nominal program signal fed to the electromagnet.

REFERENCES:
patent: 2241556 (1941-05-01), MacMillin et al.
patent: 2457467 (1948-12-01), Hartman
patent: 3579987 (1971-05-01), Busse

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