Compressor unit in an injection-compression molding machine
AssigneeFanuc Corporation
InventorsYoshiharu Inaba, Hideo Naito, Kikuo Watanabe, Masayuki Iwatsuki
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Abstract
A compressor unit of an injection-compression molding machine having a movable platen and a stationary platen. The compressor unit includes a compression pin (32) fixed to the end of a ball screw (29) threadedly engaged with a ball nut (24) which is coupled, by means of a power transmission mechanism (35), to a servomotor (19) attached to the movable platen (3). As the servomotor rotates, the compression pin moves axially together with the ball screw relative to the movable platen to project through the movable platen toward a mold clamped between the platens to cause molten resin filling the mold to be compressed.
Claims4
A compressor unit of an injection-compression molding machine wherein said injection-compression molding machine has a movable platen and a stationary platen, said platens clamping a mold filled with molten resin, said unit comprising:
- a servomotor attached to said movable platen;
- a ball nut operatively coupled to said servomotor for rotation;
- a ball screw threadedly engaged with said ball nut, said ball screw movable in an axial direction, upon rotation of said ball nut and a pin couple to said ball screw so as to be movable with said ball screw whereby when said ball nut is rotated to move said ball screw forwardly relatively to said moving platen, said pin is moved forwardly through said movable platen to cause said molten resin to be compressed.
Dependencies are inferred from the claim text.