Hitachi Metals, Ltd.

Takao Kaneuchi

Ryoichi Shibata

Hideya Yamane

Tomomi Souda

The present invention relates to a die casting method in order to obtain aluminum alloy having high quality and excellent mechanical characteristics. Further, the present invention relates to a die casting method to produce such an aluminum alloy casting, wherein primary crystal of molten metal is substantially granulated in a casting sleeve so as to form a semi-molten status, and then filled under pressure into a die cavity and solidified, so that molten metal flow becomes laminar flow, thus making less air mixing, and casting can be made without oxides and solidified matter being filled into die cavity.

Die casting method

A die casting method and a die casting machine of the invention is provided. The method comprises the steps of forming a casting sleeve comprising an inner cylinder and an outer cylinder, having a conductor material, and disposing an induction coil on the outer periphery of the outer cylinder. The conductor material may be in the form of a plurality of conductors uncontinuously disposed about the cylinder or it may be in the form of a single conducting material having a plurality of slits. A material to be cast in the casting sleeve may be heated, maintained a constant temperature and stirred by electromagnetic induction. The material may be substantially separated from the wall face of the casting sleeve by an electromagnetic force generated between the conductor and the material and the temperature drop of the material may be suppressed. The material being casted can efficiently be heated, maintained a constant temperature and electromagnetically stirred, while maintaining the machine accuracy of the casting sleeve.

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Mooka, Japan

Takao Kaneuchi