Motor-driven vertical type injection molding apparatus

Details Motor-driven vertical type injection molding apparatus Motor-driven vertical type injection molding apparatus

1992-09-28

1994-07-26

Heitbrink, Tim

Plastic article or earthenware shaping or treating: apparatus

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

Feed control of material en route to shaping area

425542, 4254516, 425593, B29C 4518

Patent

active

053323823

ABSTRACT:
A screw holding member in which a screw is rotatably provided is guided in a vertical direction by two guide shafts. A ball screw is integrally provided on an upper part of the screw holding member through a load cell. A ball nut screwed to the ball screw is provided internally in an upper base through bearings. A second toothed pulley is fixed to the upper part of the ball nut. The ball nut is rotated by an injection motor through the second toothed pulley. The ball screw and the screw 44 are vertically driven by rotation of the ball nut. The second toothed pulley is formed with a through-hole into which the ball screw is loosely fitted, whereby the ball screw does not protrude from the second toothed pulley even when the ball screw rises.

REFERENCES:
patent: 5092753 (1992-03-01), Kumamura et al.
patent: 5129808 (1992-07-01), Watanabe et al.

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