Controller of injection molding machine
AssigneeFanuc Corporation
InventorsTatsuhiro Uchiyama, Hiroshi Watanabe
Life of this patent
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Abstract
A crosshead position Cf for obtaining a set mold clamping force is obtained based on a mold touch position Ct obtained in mold clamping process in immediately preceding molding cycle, and a crosshead is allowed to move to the position Cf. During that time, it is determined whether a load La of a servomotor for mold clamping operation which drives a toggle mechanism exceeds a judgment load Ls, and a crosshead position Ca when the load La exceeds the judgment load Ls is stored as a mold touch position. In the next molding cycle, a crosshead position Cf where the set mold clamping force is obtained is obtained based on this stored mold touch position.
Claims4
A controller of an injection molding machine having a toggle type mold clamping apparatus, comprising:
- mold touch position detecting means for detecting crosshead position when mold touch occurs;
- means for storing the crosshead position detected by the mold touch position detecting means;
- and
- means for obtaining a target position of the crosshead in the current mold clamping process based on the crosshead position at mold touch which is detected and stored in the last mold-closing operation and a set mold clamping force,
- wherein the crosshead is positioned to the target position obtained by said means for obtaining a target position of the crosshead.
Dependencies are inferred from the claim text.