Rapid investment casting method based on stereolithography (SL)

Abstract

The invention discloses a rapid investment casting method based on stereolithography (SL). A wax mould in investment casting is replaced with a resin prototype (1) produced by applying a 3D printing technology, the resin prototype (1) is of a thin-walled honeycomb structure, an ingate (2) is arranged on the resin prototype (1), a gating system adopts a conventional wax gating system (3), a groove (4) is formed in the wax gating system (3), the ingate (2) is inserted into the groove (4) to be bonded and fixed during tree casting, a wax rod (5) is arranged on the resin prototype (1), and vent holes are formed after shell making. The rapid investment casting method reduces the casting cost, reduces the production cycle, and avoids the cracking phenomenon of a shell in the process of roasting.

Description

technical field [0001] The present invention relates to an investment casting method, in particular to a rapid investment casting method based on light curing (ie stereolithography appearance, English: Stereo lithography Appearance, English abbreviation SL). Background technique [0002] 3D printing technology has fast manufacturing speed and low cost, can manufacture complex parts, and can eliminate defects in advance; while casting can form almost any kind of metal, and is not limited by the size of the parts, and the cost is low, but from design to model, model The casting cycle of the casting is longer. The combination of 3D printing technology and traditional casting technology can maximize strengths and avoid weaknesses, greatly simplifying and shortening the process of lengthy design, modification, redesign and mold making. The combination of 3D printing technology and traditional casting technology forms rapid casting technology. The basic principle is to use 3D pri...

AI Technical Summary

Problems solved by technology

[0002] 3D printing technology has fast manufacturing speed and low cost, can manufacture complex parts, and can eliminate defects in advance; while casting can form almost any kind of metal, and is not limited by the size of the parts, and the cost is low, but from design to model, model To the casting, its casting cycle is longer

[0004] Fast investment casting based on light curing (SL) does not require wax injection molds, and the cycle of castings is greatly shortened. It has broad application prospects in new product trial production and single-piece small-batch production. It has just started, and the specific application is still in the research and development stage. It needs to be explored in practice. At present, there is no relatively complete specification or process, especially the rapid investment casting based on light curing (SL) is easy to crack during firing. , high cost of light-curing prototypes, troublesome operations in production operations, etc., seriously restrict the development and application of rapid investment casting based on light-curing (SL)

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