Injection device of light metal injection molding machine
AssigneeSodick Co., Ltd.
InventorsShinjiro Tsuji, Shuji Kai
Life of this patent
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Abstract
An injection device of a light metal injection molding machine of the disclosure includes: a melting cylinder that heats and melts a billet pushed along a cylinder hole and stores molten metal; an injection cylinder that injects, by an inserted plunger, the molten metal supplied by free fall due to the own weight from the melting cylinder through a communication path that can be opened and closed; and a molten metal pot in which a molten metal supply/discharge port connected to the melting cylinder is opened at a location in the melting cylinder that does not face an opening of the communication path on the melting cylinder side, and molten metal in an amount in excess of a capacity that can be stored in the melting cylinder is stored.
Claims9
An injection device of a light metal injection molding machine, comprising:
- a melting unit, in which the light metal material in a cylindrical short rod shape that is sequentially supplied from an opening on a rear end surface of a melting cylinder into the melting cylinder in a manner of being pushed along a cylinder hole is heated and melted into molten metal in the melting cylinder, and the molten metal is stored in the melting cylinder;
- an injection unit, in which the molten metal supplied from inside the melting cylinder into an injection cylinder by free fall due to own weight of the molten metal is stored in the injection cylinder, and the molten metal stored in the injection cylinder is injected by a plunger inserted so as to be capable of moving back and forth in the injection cylinder;
- a connection member that connects the melting unit and the injection unit, in which a communication path communicating the inside of the melting cylinder with the inside of the injection cylinder is formed;
- a molten metal pot in which a molten metal supply/discharge port is formed supplying and discharging the molten metal, wherein the molten metal pot is connected to the melting cylinder in a manner that at a location in the melting cylinder except for one facing an opening of the communication path on the melting cylinder side, the molten metal supply/discharge port is opened so as to communicate with the inside of the melting cylinder, and the molten metal pot stores the molten metal in an amount in excess of a capacity that is able to be stored in the melting cylinder;
- a backflow prevention device opening and closing the communication path;
- and
- a liquid surface level detection device that detects a height of a liquid surface of the molten metal stored in the molten metal pot, wherein
- an inner diameter of the molten metal supply/discharge port is formed to be larger than an inner diameter of the communication path and smaller than an inner diameter of the molten metal pot.
Dependencies are inferred from the claim text.