Vacuum die-casting system of die-casting machine

Abstract

The invention discloses a vacuum die-casting system of a die-casting machine, which comprises the die-casting machine, a fixed-mold wallboard of a die casting mold, and a vacuum program control device of a die-casting system, wherein the vacuum die-casting system of the die-casting machine is arranged on the fixed-mold wallboard, the template of the fixed-mold wallboard of the die casting mold is provided with a channel, the outlet of the channel is connected with a vacuumizing device consisting of a vacuum pump, a negative pressure tank, a filter and a vacuum shut-off valve of the die casting mold by pipes; a channel leading to the center of the template of the die casting mold is connected with a casing pipe, the inner end of the casing pipe is communicated with a cavity of the template of the die casting mold, and a valve rod connected with a piston rod of an oil cylinder on the fixed-mold wallboard is arranged in a hole arranged at the outer end of the casing pipe. When carrying out die assembling on the die casting mold of the die-casting machine, by aid of the negative pressure produced by the vacuum pump of the vacuum die-casting system, the invention instantaneously extracts gases in the cavity and the pipe of the template of the mold, and closes the channel timely when the cavity is filled with molten metals, thereby preventing the molten metals from entering the vacuum pipelines so as to carry out die-casting molding on the molten metals in a vacuum.

Description

technical field [0001] The invention belongs to the technical field of metal forming. The invention relates to a vacuum die-casting technology, in particular to a vacuum die-casting system of a die-casting machine. Background technique [0002] Die casting is a forming process in which liquid metal fills the mold cavity at a very high speed under high pressure, and cools and solidifies under pressure to obtain a casting. Since the molten metal fills the mold cavity in a high-speed injection state, most of the gas in the cavity is too late to be discharged, and is inevitably involved in the molten metal, and remains in the die casting in the form of pores, resulting in the formation of relatively large gas in the die casting. Serious porosity defects, there are certain problems in the inherent quality of the product, so ordinary die castings cannot be heat treated or welded, so the mechanical properties of the die casting itself cannot be further improved, and the expansion ...

AI Technical Summary

Problems solved by technology

The vacuum shut-off valve installed in the vacuum die-casting system can be effectively opened during the die-casting process to suck out the gas in the cavity, and it will be closed in time after the cavity is vacuumed, so that the molten metal can be filled in a vacuum state. type, which solves the serious inherent product quality problems existing in the existing die-casting forming technology

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