Lost foam casting method

Abstract

The invention discloses a lost foam casting method in the technical field of lost foam casting. The method comprises the following steps: lost foam drawing, mold manufacturing, molding sand molding, jolt ramming, sealing and vacuumizing treatment, formwork elimination, casting mold pouring, waste gas purification treatment, casting post-treatment and molding sand recovery. After a formwork is manufactured, the formwork in a sand mold is heated, the heating lasts for a period of time, the formwork is heated and converted from solid into liquid, formwork liquefying is realized, and the liquefied formwork is discharged from the sand mold, so that the replacement of the formwork is effectively realized, a workpiece cavity is conveniently and quickly formed, and a casting workpiece is conveniently formed by subsequently pouring liquid metal. The heating temperature of the sand mold is increased for a period of time, so that residual liquid formwork raw materials are converted into gas, clean and rapid removal of the formwork materials is achieved, the casting quality of castings can be guaranteed, waste gas can be collected, the mold sand can be recycled and reused, the production cost is reduced, energy consumption is reduced, and the environment friendliness is high.

Description

technical field [0001] The invention relates to the technical field of lost foam casting, in particular to a lost foam casting method. Background technique [0002] Lost Foam Casting is a technology for precise molding of liquid metal with almost no margin, and is considered as "new casting technology in the 21st century" and "green engineering in casting". Lost foam casting has been accepted and recognized by the foundry industry due to a series of advantages such as high dimensional accuracy of castings, good surface finish, wide range of process adaptation, simple operation, and can greatly improve the labor intensity and environment of foundry workers. Film, white film is polystyrene foam plastic, the waste gas containing benzene organic matter generated after the white film is burned is discharged into the atmosphere by the vacuum pump, causing pollution to the surrounding environment. Although there are new casting methods on the market, they are disappearing. In the ...

AI Technical Summary

Problems solved by technology

Lost foam casting has been accepted and recognized by the foundry industry due to a series of advantages such as high dimensional accuracy of castings, good surface finish, wide range of process adaptation, simple operation, and can greatly improve the labor intensity and environment of foundry workers. Film, white film is polystyrene foam plastic, the waste gas containing benzene organic matter generated after the white film is burned is discharged into the atmosphere by the vacuum pump, causing pollution to the surrounding environment. Although there are new casting methods on the market, they are disappearing. In the process of mold casting workpieces, although it plays the role of preventing casting failure caused by sand collapse, the mold shell must be made separately, which increases the difficulty in the process and increases the production cost. Therefore, we propose a lost foam casting method

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