B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 45/77 (2006.01) B29C 45/50 (2006.01) B29C 45/76 (2006.01) B29C 45/78 (2006.01)
Patent
CA 2054739
ABSTRACT The invention relates to an injection control method for controlling the weight of a plasticized synthetic resin injected from the cylinder of the injection molder to fill the cavity of a mold. An object of the invention is to offer the method for keeping the quality of the products constant even if there is an influence by outside disturbances or there is a change in the given conditions, such as the molten resin pressure. Another object is to offer a method wherein a study and an analysis from the beginning is not required, different from the adaptive control, in csse of the change of the mold. The travel distance SD of the screw to the position for injecting the plasticized synthetic resin by the amount corresponding to the weight value G of a product is calculated by a specified calculation formula and preset. And the injection of the plasticized synthetic resin into the mold cavity is stopped when the screw has moved for the preset travel distance SD from the stop position immediately before injection. 41
Ltd. Komatsu
Riches Mckenzie & Herbert Llp
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