Low-pressure aluminum alloy casting machine with vacuum deairing system

Abstract

The invention belongs to the field of casting machines, provides a low-pressure aluminum alloy casting machine with a vacuum deairing system and aims to solve the problem that an existing low-pressure aluminum alloy casting machine which adopts compressed inert gases for stir deairing results in high cost and poor deairing effects. A scheme includes that the low-pressure aluminum alloy casting machine comprises a workbench, a holding furnace, a hydraulic pump unit, an air pressure control case and a vacuum pump. The holding furnace is mounted at the lower end of the workbench, the hydraulic pump unit is connected with the workbench through a hydraulic pipe, and an air inlet pipe is arranged between the air pressure control case and the holding furnace. The low-pressure aluminum alloy casting machine is characterized in that an air inlet pressure valve is mounted on the air inlet pipe, a vacuum valve is mounted on a vacuum pipeline which is connected between the vacuum pump and the holding furnace, and a pressure balance valve is arranged on the vacuum pipeline and between the holding furnace and the vacuum valve. Owing to the vacuum deairing system, the low-pressure aluminum alloy casting machine is effective in deairing, and cost on inert gases used for deairing by traditional deairing machines is saved.

Description

technical field [0001] The invention belongs to the field of casting machines, in particular to an aluminum alloy low-pressure casting machine. Background technique [0002] During the casting process of the existing low-pressure casting machine, the dissolved air in the aluminum alloy melt is stirred with compressed inert gas or metal flux before the aluminum alloy melt is subcontracted to the aluminum alloy low-pressure holding furnace. outgassing. Then the molten aluminum is subcontracted into the holding furnace, sealed and then cast. The current degassing method and degassing process are performed before the molten aluminum is subcontracted to the holding furnace or before casting starts, that is to say, the degassing process is performed in an open environment with the furnace mouth open , Once the holding furnace is sealed and low-pressure casting starts, it cannot be degassed again during the casting process. There are following deficiencies in the traditional ope...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a low-pressure aluminum alloy with a vacuum degassing system that can degas during the casting process when the existing aluminum alloy low-pressure casting machine cannot perform degassing operations after entering the casting working state. casting machine

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