Clamping system and clamping method

Details Clamping system and clamping method Clamping system and clamping method

2006-08-24

2009-02-24

Mackey, James (Department: 1791)

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

Positioning of a mold part to form a cavity or controlling...

C164S004100, C164S137000, C164S154200, C164S341000, C425S150000, C425S589000, C425S595000

Reexamination Certificate

active

07494609

ABSTRACT:
A clamping system provided with a fixed die plate, a movable die plate, a plurality of tie bars, half nuts able to be coupled with or release coupled parts of a plurality of tie bars, clamping cylinders accommodating pistons of a plurality of tie bars, position sensors detecting positions of pistons, a plurality of direction control valves connected to a plurality of clamping cylinders, and a control unit controlling the plurality of direction control valves so that a difference of movement amounts of pistons among the plurality of tie bars from the time of die contact to the time of the completion of clamping becomes within a predetermined permissible value based on detection results of the position sensors.

REFERENCES:
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patent: 6821104 (2004-11-01), Kubota et al.
patent: 7001545 (2006-02-01), Okado et al.
patent: 7287972 (2007-10-01), Tsuji et al.
patent: 7288221 (2007-10-01), Tsuji et al.
patent: 2-290662 (1990-11-01), None
patent: 2004-001470 (2004-01-01), None
patent: 2004-322609 (2004-11-01), None
Office Action issued in foreign counterpart Chinese Application No. 200610132287.9, date stamped Nov. 23, 2007.
Partial English translation of Office Action issued in foreign counterpart Chinese Application No. 200610132287.9, date stamped Nov. 23, 2007.

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