Electrical injection velocity-pressure switching and...

Details Electrical injection velocity-pressure switching and... Electrical injection velocity-pressure switching and...

2006-02-07

2006-02-07

Heitbrink, Tim (Department: 1722)

Plastic article or earthenware shaping or treating: apparatus

Control means responsive to or actuated by means sensing or...

Temperature control

C425S145000, C264S040100

Reexamination Certificate

active

06994537

ABSTRACT:
A velocity-pressure switching and pressure holding device and system for electrically-operated injection molding machines. The switching between closed-loop position control and closed-loop pressure control of a servo motor of an injection molding machine is quickly and smoothly achieved by a switchable loop switch to ensure the optimal control of the velocity-pressure switching during injection filling and pressure holding. Furthermore an adjustable observation value and a speed reducing set up for the injection axle before switching are provided to allow users to perform minor adjustments on the velocity-pressure switching during the slow down of the injection axle. The present invention easily and precisely achieves the optimal velocity-pressure switching parameters to facilitate better pressure holding ability to increase the quality of the plastic products.

REFERENCES:
patent: 4988273 (1991-01-01), Faig et al.
patent: 5154935 (1992-10-01), Kamiguchi et al.
patent: 5362222 (1994-11-01), Faig et al.
patent: 5551857 (1996-09-01), Fujioka et al.
patent: 5997778 (1999-12-01), Bulgrin
patent: 6468064 (2002-10-01), Kamiguti et al.

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