Lost foam-shell mold casting vibration and solidification method based on foam mold

Abstract

The invention relates to a lost foam-shell mold casting vibration and solidification method based on a foam mold, comprising the following steps of: (1) manufacturing the foam mold with a ceramic shell on a surface thereof; (2) after the foam mold is subjected to lost foam mold and baking, putting the foam mold into a bottom-drawing sandbox, filling scattered molded dry sand into the bottom-drying sandbox, closing a vibrating table after vibrating and compacting the scattered dry sand pass through the vibrating table, coating a layer of plastic film on the upper part of the bottom-drawing sandbox, and placing a pouring cup on the upper part of the bottom-drawing sandbox to be poured; and (3) opening a vacuum device and the vibrating table, injecting metal liquid into a ceramic shell through the pouring cup, vibrating and solidifying, closing the vibrating table and the vacuum device after the metal liquid is solidified into a cast completely, and opening the sandbox to perform cleaning. The lost foam-shell mold casting vibration and solidification method based on the foam mold is simple, lower in cost, convenient to operate and environmental-friendly. An effective method with the characteristics of convenience, quickness, low cost, environmental-friendly grain size of refined casts and enhanced performances of the casts is provided for lost foam-shell mold casting enterprises.

Description

technical field

[0001] The invention relates to the field of precision casting, in particular to a vibration solidification method for lost pattern shell casting based on a foam plastic mold. Background technique

[0002] Lost foam casting is a new technology with nearly no allowance and precise forming. It is called "new casting technology in the 21st century" and "green engineering in casting". It has been greatly developed and widely used at present. However, there are also certain problems in lost foam casting. For example, the decomposition of the foamed plastic pattern used in the pouring process will bring many defects such as pores, wrinkles, inclusions, and carburization. The grains are coarse, and the performance of the casting is low, especially for the lost foam casting of aluminum and magnesium alloys.

[0003] Lost foam shell casting is a new composite casting process developed by combining lost foam casting and investment casting. After taking off the foam m...

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