Nissei Plastic Industrial Co., Ltd.

Satoru Tokida

Suinobu Kubota

Kazuyuki Okubo

Tokiro Kogane

Hiroyuki Handa

Takemi Uehara

Masashi Suda

Issei Yamaguchi

An injection molding apparatus includes an electric motor, a torque variable mechanism that changes an output torque of the electric motor, and a screw driving unit that transmits the output torque of the torque variable mechanism to a feed screw, whereby the feed screw is turned by the electric motor, the torque variable mechanism and the screw driving unit. The torque variable mechanism applies, to the feed screw, a torque equivalent to a hydraulic drive. The electric motor is interchangeable with a hydraulic motor to enable the injection molding apparatus to change between electric and hydraulic drive of the feed screw.

Injection molding apparatus

When a laminating apparatus M is constituted with a vacuum suction step Sfor vacuum sucking an enclosed space in a work trayaccommodating a laminated-substrate W, a thermocompression-bonding step Sfor heating and pressuring the work trayhaving finished the vacuum suction step S, and a cooling step Sfor cooling the work trayhaving finished the thermocompression-bonding step S, a conveyer route R of a rectangular frame form to circulatorily convey the work trayalong a horizontal direction is provided, and in a processing conveyer section Rp composing one side of the conveyer route R, the vacuum suction step S, the theremocompression-bonding step S, and the cooling step Sare sequentially disposed.

Laminating apparatus

A method for operating a hydraulic drive apparatus in which flows of oil discharged from a plurality of hydraulic drive sources each using a hydraulic pump are merged in order to drive an actuator. At least in a pressure control mode, one of the hydraulic drive sources (main hydraulic drive source) is operated in a regular manner, and the other hydraulic drive source (auxiliary hydraulic drive source) is operated such that at A merge point where the oil flows merge, the pressure of oil from the auxiliary hydraulic drive source becomes lower than the pressure of oil from the main hydraulic drive by a predetermined amount. Thus, an ordinary pressure control signal is applied to the main hydraulic drive to perform an ordinary pressure control. However, through modification of the pressure control signal applied to the auxiliary hydraulic drive source and adjustment of a control valve, the pressure of oil from the auxiliary hydraulic drive source at the merge point becomes lower than the pressure of oil from the main hydraulic drive source at the merge point by a predetermined amount, so that pressure oscillation phenomenon (resonance phenomenon) is prevented.

Method for operating hydraulic drive apparatus

An electric injection apparatus comprising a hydraulic cylinder for back pressure control. The electric injection apparatus includes rear and front supports integrally coupled to each other by a tie bar with a predetermined spacing therebetween. A heating barrel having an injection screw arranged therein is attached to the front support. Between the supports, a screw thrust member having an injection screw rotatably coupled to its front center is movably arranged so that the tie bar penetrates therethrough. Besides, the cylinder in the hydraulic cylinder is isolated from the heating barrel. This eliminates thermal effects and allows stable back pressure control in long-hour use.

Growing community of inventors

Nagano, Japan

Satoru Tokida