Kabushiki Kaisha Meiki Seisakusho

Nisso Electric Company

Tsuyoshi Miyaki

Satoshi Nishida

Hiroshi Shibuya

Tokuzou Sekiyama

Ryozo Morita

Keijiro Oka

Satoshi Tomita

An injection molding machine comprises a pre-pressure addition meansadding a pre-pressure B acting in the opposite direction of a molding material pressure A received by a screwto a detection meansand/or the screw, the detection meansdetecting the axial pressures A and B of the screw, and a screw movement control meanscontrolling the axial pressure based on a different between the pre-pressure B and the molding material pressure A, wherein the pre-pressure addition meansis made non-contact with the direction means, a forward and backward driving motoris disposed adjacent to a heating cylinder, and a screw connectorat the rear end of the screwis spline-connected inside a rotating rotor of a screw rotating motor. According to the machine, the molding material pressure received by the screw can be accurately detected without being affected by the wear of the machine so as to properly control the axial pressure of the screw and to make the machine compact.

Injection molding machine and method of controlling the injection molding machine

An injection molding machine comprises a pre-pressure addition meansadding a pre-pressure B acting in the opposite direction of a molding material pressure A received by a screwto a detection meansand/or the screwthe detection meansdetecting the axial pressures A and B of the screw, and a screw movement control meanscontrolling the axial pressure based on a different between the pre-pressure B and the molding material pressure A, wherein the pre-pressure addition meansis made non-contact with the direction meansa forward and backward driving motoris disposed adjacent to a heating cylinderand a screw connectorat the rear end of the screwis spline-connected inside a rotating rotor of a screw rotating motorAccording to the machine, the molding material pressure received by the screw can be accurately detected without being affected by the wear of the machine so as to properly control the axial pressure of the screw and to make the machine compact.

Injection molding machine having a screw support base moved by an actuator

Growing community of inventors

Ohbu, Japan

Tsuyoshi Miyaki