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
1987-06-17
1988-04-05
Woo, Jay H.
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, 425171, B29C 4580
Patent
active
047355646
ABSTRACT:
An injection molding machine generally comprises a heating cylinder, a screw rotated and reciprocated in the heating cylinder and a screw drive system. The screw drive system comprises two motors and two sensors connected respectively thereto which are automatically controlled by a control system in connection with a screw revolution number and a screw back pressure, or independently so as to accurately carry out the resin measuring process. The control system performs an adaptive control of a motion control system inclusive of the screw and the screw drive system in response to a screw speed instruction, a screw revolution number feedback signal, and a screw position feedback signal in accordance with various control modes.
REFERENCES:
patent: 3797808 (1974-03-01), Ma et al.
patent: 4256678 (1981-03-01), Fujita et al.
patent: 4540359 (1985-09-01), Yamazaki
Kurita Naoki
Maehara Hiroyuki
Nagata Hirozumi
Oda Etsuji
Sasaki Yoshinari
Heitbrink Timothy W.
Toshiba Kikai Kabushiki Kaisha
Woo Jay H.
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