Injection compression molding method and an apparatus therefor

Details Injection compression molding method and an apparatus therefor Injection compression molding method and an apparatus therefor

1992-09-21

1993-10-05

Ruggiero, Joseph

Boots, shoes, and leggings

264 401, 264 405, 264 407, 425149, 425162, G06F 1546, B29C 4576

Patent

active

052511464

ABSTRACT:
An injection compression molding method and an apparatus therefor are provided, which are capable of accurately performing a molten resin compression operation during execution of an injection/hold operation or a metering operation, so as to produce high-quality molded products with no substantial variations between these products.
A processing device for numerical control for controlling the drive of servomotors for individual axes of an injection molding machine executes pulse distribution associated with an axis for molten resin compression concurrently with execution of pulse distribution for an injection axis or a screw rotation axis (S200, S205) on the basis of information specifying the molten resin compression axis, information for the molten resin compression control including the feed amount, feed rate and feed direction associated with the molten resin compression axis, and a molten resin compressing operation command, which are respectively delivered from a programmable machine controller for sequence-controlling various operating sections of the injection molding machine upon elapse of a preset timer period from an instant at which an injection operation is started. The processing device also effects torque limit control of an output torque of a compression sevomotor so that a compression force actually applied to the molten resin attains a preset value.

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