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US 5,217,725 AGranted
Electrically driven type injection molding apparatus
AssigneeCanon Kabushiki Kaisha
InventorsRyohei Inaba, Masaaki Kumamura, Shojiro Danmoto, Mitsuo Arai, Yozo Tobo, Hirofumi Sugawara, Tadanobu Miyazaki
Life of this patent
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Abstract
An injection molding apparatus uses motors to effect measuring and kneading of a material to be molded and injection driving. The amount of movement of a rotary shaft or rectilinearly moving means connected to a screw is detected by a sensor, and the driving of the volume measuring motor and the injection motor is effected by the output of the sensor.
Claims6
An electrically driven injection molding apparatus, comprising:
- a screw for kneading a material to be molded in a cylinder;
- a first motor for rotating said screw and measuring an amount of said material to be molded;
- a back pressure cylinder connected to said screw for imparting back pressure to said screw;
- rectilinearly moving means connected to said back pressure cylinder for rectilinearly moving said back pressure cylinder;
- a second motor for driving said rectilinearly moving means;
- a volume measuring sensor for detecting the completion of measuring and outputting a signal;
- a sensor dog connected to said crew;
- and
- first logic means for receiving the signal from said volume measuring sensor as an input sensor and controlling said first motor.
6 more elements
Dependencies are inferred from the claim text.