Novel precision-casting shell-making technology

Abstract

The invention discloses a novel precision-casting shell-making technology. The novel precision-casting shell-making technology comprises the steps of (1) surface layer coating configuration, (2) wax mould sand coating, and (3) air drying, dehumidifying and reinforcing. The production period can be effectively shortened, the production cost is reduced, the surface and internal storage quality of casting shell making is improved, and the dimensional precision of a casting is ensured; and the casting yield is improved, the mould shell residual strength can be effectively reduced, and air overflowing in the molten steel mould filling process is facilitated.

Description

technical field [0001] The invention relates to the technical field of investment casting precision casting, in particular to a novel precision casting shell-making process. Background technique [0002] With the development of science and technology, the existing industry has higher and higher requirements for product technical performance. Complex structural parts are often realized by casting. Through strict control of the surface and memory quality and dimensional accuracy of the product, the casting can be obtained. It has been greatly developed, but in the existing technology, the related casting process for some heavy metals with high requirements is still relatively backward, and composite technology is often used, but the production cycle of the process is long and the production cost is high. In addition to the influence of surface and memory quality and dimensional accuracy, the selection of shell-making process steps is also extremely important. At present, zirco...

AI Technical Summary

Problems solved by technology

[0002] With the development of science and technology, the existing industry has higher and higher requirements for product technical performance. Complex structural parts are often realized by casting. Through strict control of the surface and memory quality and dimensional accuracy of the product, the casting can be obtained. It has been greatly developed, but in the existing technology, the related casting process for some heavy metals with high requirements is still relatively backward, and composite technology is often used, but the production cycle of the process is long and the production cost is high. In addition to the influence of surface and memory quality and dimensional accuracy, the selection of shell-making process steps is also extremely important. At present, zircon sand and Shangdian sand are mainly used as mold shell materials at home and abroad, but zircon sand is expensive and costly. Store sand, the memory quality of castings is low, and it will increase the residual strength of the mold shell, which is not convenient for the overflow of molten steel filling