Back to results
US 5,092,753 AGranted
Electric injection molding apparatus
AssigneeCanon Kabushiki Kaisha
InventorsMasaaki Kumamura, Ryohei Inaba, Shojiro Danmoto, Mitsuo Arai, Yozo Tobo, Tadanobu Miyazaki
Life of this patent
Estimating the term…
Abstract
An injection screw disposed in a heating cylinder is connected to a rotary driving force receiving mechanism, a linear driving force receiving mechanism, and a back pressurizing mechanism. The rotary driving force of an electric motor is transmitted to the rotary driving force receiving mechanism and the linear driving force receiving mechanism through clutches, which are controlled according to sensors for detecting the position of the screw or the linear driving force receiving mechanism.
Claims2
An electric injection molding apparatus, comprising:
- a screw for injecting molding material;
- a heating cylinder for housing said screw and receiving the molding material;
- a motor for imparting rotational and linear movement to said screw;
- rotary transmitting means driven by said motor for transmitting rotational movement to said screw;
- linear transmitting means driven by said motor for transmitting linear movement to said screw;
- a first clutch for connecting and disconnecting said rotary transmitting means to said motor;
- a second clutch for connecting and disconnecting said linear transmitting means to said motor;
- means for measuring the amount of molding material deposited in said heating cylinder, said measuring means including a first detector for detecting a starting position of said linear transmitting means and a second detector for detecting a predetermined position of said linear transmitting means, with the predetermined position indicating completion of the measurement;
- and
- first control means for controlling said measuring means by actuating said first clutch to connect said rotary transmitting means with said motor to lift said linear transmitting means from the starting position to the predetermined position.
7 more elements
Dependencies are inferred from the claim text.