Retracting clamp

Details Retracting clamp Retracting clamp

1983-05-10

1985-03-12

Watson, Robert C.

Work holders

With fluid means

Plural positioning means sequentially operated

269 32, 269 93, 269234, B23Q 308

Patent

active

045040460

ABSTRACT:
A retracting clamp for dies or workpieces, especially for the die of the injection molding machine, whose clamp arm is installed in the chamber of the clamp housing so as to shift its position between an extended position and retracted position. The clamp arm is driven with a wedge connected to the piston-rod of the hydraulic cylinder. A spring enables clamp arm to hold the clamping force in case of hydraulic oil leakage. There is also provided means for retracting the wedge without failure and means for detecting the positions of the clamp arm.

REFERENCES:
patent: 3363514 (1968-01-01), Ramcke
patent: 4027867 (1977-06-01), Pollington
patent: 4338787 (1982-07-01), Kawayuchi
patent: 4365792 (1982-12-01), Johns

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