Method for controlling injection in a die casting machine and ap

Details Method for controlling injection in a die casting machine and ap Method for controlling injection in a die casting machine and ap

1998-11-25

1999-09-28

Pyon, Harold

Metal founding

Process

With measuring, testing, inspecting, or condition determination

1641541, 1641553, 1641554, 1641555, 164113, 164312, 164133, 164337, B22D 1732, B22D 3700

Patent

active

059571926

ABSTRACT:
A method and an apparatus for controlling an injection of a die-casting machine, the apparatus having an open-shut valve for opening and shutting a hydraulic channel through which hydraulic fluid is discharged from a boost cylinder device and a boost cylinder flow-control valve for regulating a flow of the hydraulic fluid discharged from the boost cylinder device. When a highly viscous molten material is injected toward a casting mold and the molten material reaches a gate of the casting mold, an injection resistance is increased. At this time, by regulating the hydraulic channel with the control valves to discharge the hydraulic fluid in accordance with a predetermined program, the boost cylinder device applies further pressure to the injecting piston to assist injection process, thereby preventing inappropriate change in injection speed. Consequently, the open-shut valve is opened to conduct ordinary pressure boosting pressure process.

REFERENCES:
patent: 5052468 (1991-10-01), Koenig
patent: 5365999 (1994-11-01), Stummer et al.
patent: 5662159 (1997-09-01), Iwamoto et al.

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