Vacuum casting process

Abstract

The invention discloses a vacuum casting process. The process comprises the following steps: A. molten metal or colored glaze liquid is melted in a smelting furnace; B. the molten metal or the colored glaze liquid are precipitated, and the middle part without dross and sand is taken; C. a mold is placed in a vacuum chamber, and the vacuum chamber is enclosed; D. air in the mold is extracted, and a certain negative pressure is caused in the mold; E. the molten metal or the colored glaze liquid is poured into a pouring ladle, after air in the molten metal or the colored glaze liquid floats upward and is discharged, an opening at the bottom of the pouring ladle is opened for casting; F. after casting, the molten metal or the colored glaze liquid is solidified, and air exhaust for the mold is stopped. Compared with the traditional casting process, the vacuum casting process has the advantages of few defects such as pores and slag inclusion, compact texture, high mechanical property, low manufacture cost, etc., and is especially good for obviously increasing density, intensity and toughness of aluminium alloy, and reducing pores.

Description

technical field [0001] The invention relates to a casting process, in particular to a vacuum casting process. Background technique [0002] The smelting and casting technology has been invented and applied by human beings. At present, most of the casting methods in China are sand mold casting. Castings made in this way are prone to defects such as pores and slag inclusions. In order to solve the above problems, people invented the vacuum casting process, but the existing vacuum casting process has high requirements on the casting mold and vacuum equipment, which leads to high manufacturing costs and limits its application and promotion. Contents of the invention [0003] The present invention aims to solve the technical problems mentioned above, and provides a vacuum casting process that can reduce defects such as pores and slag inclusions in castings and significantly reduce manufacturing costs. [0004] The present invention is achieved through the following technical s...

AI Technical Summary

Problems solved by technology

[0002] The smelting and casting technology has been invented and applied by human beings. At present, most of the casting methods in China are sand mold casting. Such castings are prone to defects such as pores and slag inclusions.

In order to solve the above problems, people invented the vacuum casting process, but the existing vacuum casting process has high requirements on the casting mold and vacuum equipment, which leads to high manufacturing costs and limits its application and promotion.