Differential pressure casting machine

Abstract

The invention discloses a differential pressure casting machine. The casting machine comprises a heat preservation furnace, wherein a crucible is arranged inside the heat preservation furnace, a liquid rising pipe is arranged inside the crucible, and an internal vacuum cover is arranged at the top of the crucible; an external vacuum cover is arranged outside the inner vacuum cover, and the external vacuum cover is arranged at the top of the heat preservation furnace; and a first vacuum pump is arranged on one side of the external vacuum cover, a gas storage tank is arranged at the bottom of the first vacuum pump, and the other side of the heat preservation furnace is provided with a second vacuum pump. According to the differential pressure casting machine, an air pressure adjusting electromagnetic valve is arranged, and the air pressure adjusting electromagnetic valve correspondingly communicates with the heat preservation furnace and the external vacuum cover through vent pipes so that internal air pressure of the heat preservation furnace and internal air pressure of the external vacuum cover can be rapidly and simply adjusted to be consistent; the method for reducing the internal air pressure changes the method for increasing pressure intensity in the crucible in the prior differential pressure casting process; and by comparison, rising fluctuation of molten metal is extremely small, and the casting process is more stable.

Description

technical field [0001] The invention relates to the field of casting, in particular to a differential pressure casting machine. Background technique [0002] At present, the aluminum alloy casting equipment commonly used in our daily production includes low-pressure casting machines, gravity casting machines, high-pressure casting machines, etc., all of which have defects such as slow solidification speed, large grain size, and low density. Thin-walled aluminum alloy castings. Differential pressure casting is a casting process method of filling under pressure and solidification and crystallization. This process combines "controllable speed filling" and "pressure crystallization" to obtain the best filling speed and the highest quality filling The molten metal endows the product with a structure and performance that is different from metal mold casting and low-pressure casting products. Most of the differential pressure casting machines on the market currently realize the pr...

AI Technical Summary

Problems solved by technology

[0002] At present, the aluminum alloy casting equipment commonly used in our daily production includes low-pressure casting machines, gravity casting machines, and high-pressure casting machines. Thin-walled aluminum alloy castings

Differential pressure casting is a casting process method of filling under pressure and solidification and crystallization. This process combines "controllable speed filling" and "pressure crystallization" to obtain the best filling speed and the highest quality filling The molten metal endows the product with a structure and performance that is different from metal mold casting and low-pressure casting products. Most of the differential pressure casting machines on the market currently realize the process of differential pressure casting by increasing the pressure in the crucible. There will be obvious fluctuations in the rising process of the pouring liquid, which will affect the cast product. Therefore, it is necessary to invent a differential pressure casting machine to solve the above problems

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