V-method casting process

Abstract

The invention belongs to the field of metal casting, and discloses a V-method casting process. The V-method casting process comprises the following steps: preparing a mould, and heating a plastic film to be in a softening state; acting vacuum onto the softened plastic film through a ventilating hole of an exhaust box of the mould, and putting a negative-pressure sand box onto the mould; filling the sand box with dry sand by using vibrating equipment; covering the top of a sand mould inside the sand box with a sealing film, connecting a pouring basin with a sprue of an upper mould, and scraping the dry sand flat before covering a lower mould with a film; vacuumizing the sand box to form a pressure difference between the interior and the exterior of the sand mould so as to compact the dry sand, releasing vacuum of the exhaust box of the mould, inflating compressed air for backblowing, and separating the sand mould from the mould; producing the lower mould by the same method, closing the upper mould and the lower mould, and preparing pouring; further vacuumizing the sand mould in the pouring process, removing the vacuum after a cast is cooled, and taking out the cast. The V-method casting process has the advantages of cost conservation, stable performance and high efficacy.

Description

technical field [0001] The invention belongs to the technical field of metal casting, and in particular relates to a V-method casting process. Background technique [0002] V-method casting is known as "new casting technology in the 21st century" and "green casting technology". The lost foam casting technology is widely used and promoted in the field of cast iron, and the quality of cast iron castings has been greatly improved, which has made customers' expectations for the quality of steel castings continue to increase, prompting steel casting companies to invest in V-method casting technology, and V-method casting complete sets of equipment , tooling mold production level, key raw and auxiliary materials (EVA film, coating, etc.) are constantly improving, and more and more foundry companies are investing in V-method casting production practice, and V-method casting technology has made great progress. [0003] With the promotion and application of V-method casting and lost...

AI Technical Summary

Problems solved by technology

However, there are certain differences in the understanding of sand used in V-method casting and lost foam casting, especially in terms of particle size and sieve size distribution.

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