Control unit capable of smoothly carrying out a switching operat

Details Control unit capable of smoothly carrying out a switching operat Control unit capable of smoothly carrying out a switching operat

1993-04-16

1994-12-06

Ip, Paul

Electricity: motive power systems

Positional servo systems

318571, 318632, 425144, 425145, B29C 4577

Patent

active

053714504

ABSTRACT:
A control unit for an injection molding machine comprises a position feedback control system 41, a pressure feedback control system 42, and a velocity minor feedback control system 43 which is used in common to the position and the pressure feedback control systems 41 and 42. A minimum value selector 30-3 selects a smaller one of manipulated variables supplied from the position feedback control system 41 and the pressure feedback control system 42. During pressure control, a position pattern follower 30-4 controls the operation of a position pattern generator 24-2 so as to restart generation of a position pattern at any time.

REFERENCES:
patent: 3864557 (1975-02-01), Sindelar
patent: 3870445 (1975-03-01), Hold et al.
patent: 3878372 (1975-04-01), Sindelar
patent: 3937776 (1976-02-01), Hold et al.
patent: 4094940 (1978-06-01), Hold
patent: 4311446 (1982-01-01), Hold et al.
patent: 5232714 (1993-08-01), Kohno et al.
patent: 5237509 (1993-08-01), Ueta et al.

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