Multistage flexible extrusion forming method for sand mold

Abstract

The invention belongs to the crossing field of casting and rapid forming, and discloses a multistage flexible extrusion forming method for a sand mold. According to the method, in the forming processof a resin sand mold for casting, multi-stage contacts are adopted for cavity approximation, a near-forming sand mold or mold sample with a higher approximate contour can be obtained, and the size ofthe near-forming sand mold is reduced, so that the sand for casting is saved, and the subsequent cutting net forming time is shortened. According to the method, firstly, cavity approximation is carried out by lifting a primary contact 1, and then supplementary mold filling is carried out by lifting a secondary contact 2, so that not only is the approximation precision of a cavity 3 improved, but also the problem that a single small contact is prone to bending and deformation during lifting is solved; and when a single small-batch casting sand mold is produced, the sand mold forming efficiencycan be remarkably improved.

Description

technical field [0001] The invention belongs to the intersecting field of casting and rapid prototyping, and in particular relates to a sand mold multi-stage flexible extrusion forming method. Background technique [0002] Casting is a kind of metal thermal processing technology mastered by human beings earlier, with a long history. The traditional sand casting process is complex, and the design and processing of molds such as patterns and core boxes is a complex and time-consuming process with multiple links. With the development of science and technology, casting technology and casting efficiency have been greatly improved. The moldless digital precision forming technology integrates CAD technology, casting technology, numerical control technology, cutting technology, etc. In casting production, no mold is needed, and various casting sand molds are produced by processing sand billets. Great advantage in production. [0003] Nowadays, economic globalization is intensifyi...

AI Technical Summary

Problems solved by technology

In the forming process of resin sand molds for casting, a near-formed sand mold with precise contours can be further obtained by extrusion, which saves time for the subsequent net shape cutting process, and can solve the problem of easy bending and deformation during the lifting and extrusion process of a single small contact

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