Plastic article or earthenware shaping or treating: apparatus – Control means responsive to or actuated by means sensing or... – Feed control of material en route to shaping area
Patent
1994-10-04
1996-07-09
Heitbrink, Tim
Plastic article or earthenware shaping or treating: apparatus
Control means responsive to or actuated by means sensing or...
Feed control of material en route to shaping area
264 405, 425149, B29C 4577
Patent
active
055338844
ABSTRACT:
A speed control unit devised for feedback-controlling the speed of actuator 2 (injection cylinder 2i) in response to the deviation of speed measurement Vd from command value Vc of speed, includes a pressure sensing device 3 to detect pressure measurement Pd at actuator 2, differentiation circuitry 4 to differentiate pressure measurement Pd from the pressure sensing device 3, a gain adjusting device to provide correction value Av through gain adjustment of differentiated value Dv from differentiation circuitry 4, and a correcting device 6 to correct command value Vc of speed according to correction value Av from the gain adjusting device 5, whereby in addition to ordinary feedback control to correct command value Vc of speed, following speed measurement Vd, command value Vc of speed is corrected in response to the fluctuations of load pressure, with stabilized, high accuracy of speed control made feasible which is assured freedom from being affected by the fluctuations of load pressure, and so forth.
REFERENCES:
patent: 5425906 (1995-06-01), Hashimoto
Arai Tsuyoshi
Nakamura Nobuyuki
Heitbrink Tim
Nissei Plastic Industrial Co. Ltd.
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