Plastic article or earthenware shaping or treating: apparatus – Control means responsive to or actuated by means sensing or... – Molding pressure control means responsive to pressure at...
Patent
1994-03-17
1996-08-20
Mackey, James P.
Plastic article or earthenware shaping or treating: apparatus
Control means responsive to or actuated by means sensing or...
Molding pressure control means responsive to pressure at...
425150, 425352, B29C 4358, B30B 1102
Patent
active
055473601
ABSTRACT:
The powder molding press reduces manufacturing and running costs by enabling rams to be driven with the necessary pressing force and ram speed despite small motor capacity. The molding press is provided with an encoder for detecting the rotating angle of a main shaft driving an upper ram, a control device for computing the quantities to be controlled of a lower ram against the detected rotational angle of the main saft, and for determining movements of the lower ram by applying data obtained from the computed results, and a motor for driving the lower ram under the control of the control device, and converting the rotational force of the motor to a compressive force and ram-driving speed suited for the molding press as well as for transmitting the force and speed to the lower ram.
REFERENCES:
patent: 2334082 (1943-11-01), Gates
patent: 3559247 (1971-02-01), Larsson
patent: 3907474 (1975-09-01), Blaser et al.
patent: 4363612 (1982-12-01), Walchhutter
patent: 4718842 (1988-01-01), Labbe et al.
patent: 5288440 (1994-02-01), Katagiri et al.
Mackey James P.
Tamagawa Machinery Co., Ltd.
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