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
Patent
1996-01-25
1997-10-21
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
264 407, 425149, 425167, 425542, B29C 4577
Patent
active
056793847
ABSTRACT:
An injection apparatus for an electric injection molding machine includes a drive unit case, a metering motor, an injection motor disposed to be coaxial with the metering motor, a first drive force transmission mechanism connected between the metering motor and a screw, being adapted to prevent relative rotational movement while allowing relative axial movement, a motion conversion mechanism for converting rotational movement to linear movement so as to advance the screw, a second drive force transmission mechanism for preventing relative rotational movement while allowing relative axial movement, and a third drive force transmission mechanism for preventing relative axial movement while allowing relative rotation. Since it is unnecessary to use timing belts for advancing and retracting movement and rotational movement of the screw, no noise is generated during drive, and maintenance and management are facilitated. In addition, accuracy in controlling the speed, position and the like of the screw is enhanced.
REFERENCES:
patent: 4755123 (1988-07-01), Otake
patent: 4879077 (1989-11-01), Shimizu et al.
patent: 5129808 (1992-07-01), Watanabe et al.
patent: 5332382 (1994-07-01), Kasai et al.
Heitbrink Tim
Sumitomo Heavy Industrie's, Ltd.
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