Method of injection control for injection molding machine

Details Method of injection control for injection molding machine Method of injection control for injection molding machine

1994-12-14

1996-05-07

Heitbrink, Jill L.

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

264 405, 2643281, 425145, 425149, B29C 4577

Patent

active

055143113

ABSTRACT:
Holding pressure-intended changeover speed Vh (provided, Vh.noteq.0) lesser than final set speed Ve in preselected speed control pattern Xv is selected while from deceleration rate Rh according to which screw 2 is decelerated at the time of,terminating final set speed Ve, holding pressure-intended changeover speed Vh and holding pressure-intended changeover position Sh, final deceleration start position Se in speed control pattern Xv, a segment of which extends, running through a point where holding pressure-intended changeover speed Vh and holding pressure-intended changeover position Sh is chosen; screw 2 is decelerated, following deceleration rate Rh when screw 2 arrives at final deceleration start position Se while injection control is in progress and when holding pressure-intended changeover position Sh or holding pressure-intended changeover speed Vh is reached, a shift is made to holding pressure control, whereby with even an electric motor-driven injection molding machine using a servo motor, a smooth shift from the injection process to the holding pressure process may be allowed; whereby it may become unnecessary to effect fine adjustment of a holding pressure-intended changeover position; and the quality of molded products and the productivity of injection molding machines may be improved.

REFERENCES:
patent: 4851170 (1989-07-01), Shimizu et al.
patent: 4954301 (1990-09-01), Saeki et al.
patent: 5102587 (1992-04-01), Kumamura et al.
patent: 5178805 (1993-01-01), Yokota
patent: 5246645 (1993-09-01), Tagawa et al.

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