Pressure casting device and method

Abstract

The invention discloses a pressure casting device which comprises a mould, a gas exhaust structure arranged in the mould and a vacuum pump arranged on the outer part of the mould; the mould comprises a first mould base, a second mould base as well as a mould cavity and a pouring gate defined by the first mould base and the second mould base when the first mould base and the second mould base are closed; through the pouring gate, the mould cavity communicates with the outer part of the mould; the gas exhaust structure comprises a first gas exhaust plate arranged on the first mould base, a second gas exhaust plate arranged on the second mould base and a gas exhaust channel defined by the first gas exhaust plate and the second gas exhaust plate when the first mould base and the second mould base are closed; and a first end of the gas exhaust channel communicates with the mould cavity in the mould, and a second end opposite to the first end is connected with a vacuum pump through a connecting tube. The pressure casting device disclosed by the invention quickly exhausts air in the mould cavity through the gas exhaust structure, not only can reduce porosity of pressure castings, also increases a mould filling rate, and ensures a relatively high yield and relatively high production efficiency. The invention also discloses a pressure casting method.

Description

technical field [0001] The invention relates to the technical field of die casting, in particular to a die casting device and method. Background technique [0002] Shrinkage cavity and porosity are the most common defects in die castings, which seriously affect the quality of die castings. The traditional high-speed die-casting process has high production efficiency, but the porosity is also high, which can generally reach about 5%. Although the low-speed die-casting process can reduce the porosity to a certain extent, the die-casting time of a single product is longer, the production efficiency is lower, and the finished product produced in large quantities is higher. [0003] Therefore, there is an urgent need to develop a die-casting device and method that can reduce porosity and improve production efficiency. Contents of the invention [0004] In order to overcome the defects in the prior art, the present invention provides a die-casting device and method for quickly...

AI Technical Summary

Problems solved by technology

[0002] Shrinkage cavity and porosity are the most common defects in die castings, which seriously affect the quality of die castings

The traditional high-speed die-casting process has high production efficiency, but the porosity is also high, which can generally reach about 5%.

Although the low-speed die-casting process can reduce the porosity to a certain extent, the die-casting time for a single product is longer, the production efficiency is lower, and the finished product produced in large quantities is higher.

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