Denso Corporation

Toyo Machinery and Metal Co., Ltd.

Hideaki Harada

Hiromi Takagi

Naohiko Tsuzuki

Hitoshi Oosawa

A die casting machineto fill by injecting molten metal into a die cavityincludes a variable displacement pumpdriven by a servo motorfor discharging hydraulic fluid from a hydraulic fluid tank, an injection cylinderwith a slidable pistonassembled therein, hydraulic fluid pipes a and c for supplying hydraulic fluid discharged by the variable displacement pumpto the injection cylinderhydraulic fluid pipes d, e, g and a logic valveconnected to hydraulic fluid pipe c for supplying hydraulic fluid ejected from the injection cylinderto hydraulic fluid pipe c with the pistonslid by the hydraulic fluid supplied to the injection cylinder

Die casting machine

A direct-acting type diecasting machine having an inexpensive and simplified hydraulic circuit is provided, which includes: a mold clamping cylinder for clamping and opening/closing a mold in a direct-acting manner; a single two-way hydraulic pump driven by a driving motor for supplying hydraulic fluid to the mold clamping cylinder in two directions; a hydraulic circuit for driving the mold clamping cylinder by controlling supply of hydraulic fluid from the two-way hydraulic pump to the mold clamping cylinder and discharge of hydraulic fluid from the mold clamping cylinder which proceeds in accordance with movement of a piston of the mold clamping cylinder; and a hydraulic controller for controlling rotational speed of the driving motor associated with the two-way hydraulic pump in opening/closing the mold at high speed and controlling torque of the driving motor in clamping the mold.

Diecasting machine

A diecasting machine capable of realizing highly precise injection of molten metal at high-speed without using an accumulator is provided, which includes: an injection cylinder for loading molten metal into a mold cavity by injection; a single two-way hydraulic pump driven by a driving motor for supplying hydraulic fluid to the injection cylinder in two directions; a hydraulic circuit for driving the injection cylinder by controlling supply of hydraulic fluid from the two-way hydraulic pump to the injection cylinder and discharge of hydraulic fluid from the injection cylinder which proceeds in accordance with movement of a piston of the injection cylinder; and a hydraulic controller for controlling rotational speed of the driving motor associated with the two-way hydraulic pump in injection/loading the molten metal and controlling torque of the driving motor in dwelling.

Growing community of inventors

Kariya, Japan

Hideaki Harada