Injection molding apparatus

Abstract

An apparatus provided is capable of performing injection molding of a high-melting point metal. The injection molding apparatus comprises a mold, a sleeve disposed so as to be movable forward and backward toward a pouring gate of the mold, a plunger slidably disposed in the sleeve, a heating means for heating and melting a raw material lump supplied into a raw material accommodating part formed by an inside wall of the sleeve and the plunger mentioned above, and a raw material lump supplying means for supplying the raw material lump to the above-mentioned raw material accommodating part from above. For the purpose of ensuring that a melt of a metal which has been heated and melted hardly flows into a gap between the plunger and the sleeve, the above-mentioned plunger and / or sleeve is equipped with a cooling means.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This is a continuation of Application PCT / JP2005 / 000377, filed Jan. 14, 2005, which was published under PCT Article 21(2).BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] This invention relates to an injection molding apparatus, and more particularly to an apparatus which is suitable for the vacuum injection molding of a high-melting point metal, particularly an active metal such as an amorphous alloy, and capable of carrying out the high-speed injection molding of a melt of the active metal while maintaining a clean state thereof. [0004] 2. Description of the Prior Art [0005] Recently, as an injection molding method capable of casting a molded article having no void with an active metal, a molding method which uses a sleeve movable toward a mold and is carried out by supplying a raw material lump into a raw material accommodating part formed by an inside wall of a sleeve and the upper end face of a plunger slidably d...

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