Wuxi Dongao Nonferrous Casting Co., Ltd.
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Operation requirements and production cycle of lift check valve castings
- Jan 07, 2019 -

The resin sand type of the lifting check valve casting has good rigidity, and the sand strength of the whole product is high at the initial stage of casting. It has the condition to utilize the graphitization expansion of the solidification process of the cast iron, effectively eliminating shrinkage and shrinkage defects, and realizing gray cast iron and ductile iron. The piece has less riser and no riser casting.

In the casting production, the lifting check valve castings mainly adopt the polystyrene foam molding pattern and the furose resin self-hardening sand molding. When the molten metal is poured into the mold, the foam plastic form rapidly vaporizes under the action of the high-temperature metal liquid, and the combustion disappears. The molten metal replaces the position occupied by the original foam, and is solidified into a solid casting having the same shape as the shape.

Lifting check valve castings are easy to operate during production, which can effectively shorten the production cycle, improve production efficiency, and have the advantages of high dimensional accuracy, small machining allowance and good surface quality. In addition, casting machine tools have Good wear resistance and shock absorption performance and good process performance.