Casting control system of die cast machine

Details Casting control system of die cast machine Casting control system of die cast machine

1989-01-30

1991-06-11

Seidel, Richard K.

Metal founding

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

Control of feed material enroute to shaping area

164157, 164305, 164312, 164457, B22D 1700

Patent

active

050224573

ABSTRACT:
This invention relates to a casting control system of a die cast machine, and more particularly to a system for controlling a high speed injection real stroke of an injection plunger and controlling valve closing timing for degassing gas in a mold cavity. The high speed injection real stroke is measured by an arithmetic unit from a signal output from a position detector, and the high speed injection real stroke is then compared with a certain preset value. When arithmetic unit determines that the high speed injection real stroke and the preset value do not coincide with each other, a pretest action delay time of the injection plunger is .+-. incrementally or decrementally corrected until both values coincide. The arithmetic unit determines a start position of the high speed injection real stroke, outputs a signal to close a breathing valve at a position, to which is added or from which is subtracted a predetermined variable value with respect to the real start position and outputs a signal to open the breathing valve at a position where the injection plunger closes a molten metal feeding port.

REFERENCES:
patent: 3767339 (1973-10-01), Hunkar
patent: 4463793 (1984-08-01), Thurner
patent: 4493362 (1985-01-01), Moore et al.
patent: 4530391 (1985-07-01), Fink et al.
patent: 4559991 (1985-12-01), Motomura et al.
patent: 4610831 (1986-09-01), Mihara
patent: 4836272 (1989-06-01), Priem
patent: 4852634 (1989-08-01), Kawai et al.

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