Method for producing ultrahigh pressure switch pressure-bearing aluminum alloy tanks under low pressure through V method

Abstract

The invention discloses a method for producing ultrahigh pressure switch pressure-bearing aluminum alloy tanks under low pressure through a V method in the technical field of vacuum casting, which comprises the following processing steps: jig manufacture, low-temperature gating system manufacture, upper tank molding, lower tank molding, lower core mould assembling, casting and pressure removing and picking. The method solves the defects of slag inclusion, pores, pinholes and the like of cast caused by intensive scouring of molten metal to cast, and simultaneously can solve the problems that the cavity casting system occupies excessive molten metal, and particularly the product yield of cast with low wall thickness and large size is low.

Description

technical field

[0001] The invention belongs to the technical field of aluminum alloy tank casting, and in particular relates to a process method combining vacuum molding (V method) and low-pressure pouring of an ultra-high pressure switch pressure-bearing aluminum alloy tank. Background technique

[0002] Method casting is the abbreviation of vacuum sealing molding or negative pressure molding casting process. Its principle is to use plastic film to cover the mold and seal the sand box, rely on the vacuum pump to draw out the air in the mold, cause the pressure difference between the inner box and the outside of the mold, and make the dry sand compact. Form the desired cavity. No binder is used in the molding sand, and the shakeout is simple, which minimizes the consumption of molding materials, reduces waste sand, and improves working conditions. Its dry sand reuse rate is as high as 95%, and the surface quality and dimensional accuracy of castings are greatly improved, w...

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