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
1997-05-30
1999-04-06
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
058914854
ABSTRACT:
There is disclosed a built-in motor type electric injection molding apparatus which can prevent a decrease in the output ratings of a metering motor and a injection motor and which enables the selection of optimal drive characteristics corresponding to the load thereof in use. In a metering stage, the metering motor is driven in order to rotate its rotor. The rotation produced by the metering motor is transmitted to a screw via a drive force transmission mechanism, so that the screw is retracted with rotation so as to meter resin. In an injection stage, the injection motor is driven in order to rotate its rotor. The rotational motion produced by the injection motor is converted into linear motion by a motion conversion mechanism, and the linear motion is transmitted to the screw, so that the screw is advanced so as to inject the resin. Since a ventilation unit ventilates first and second motor accommodation chambers, heat generated by driving the metering motor and the injection motor is released to the outside of a casing.
REFERENCES:
patent: 4758146 (1988-07-01), Piazzola
patent: 5679384 (1997-10-01), Emoto
Heitbrink Tim
Sumitomo Heavy Industrie's, Ltd.
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