Annular long casting member spiral shower casting method

Abstract

The invention discloses an annular long casting member spiral shower casting method, which is characterized in that a casting member model is vertically and fixedly arranged in a moulding sandbox, a single layer or multilayer cast loop can be arranged on the casting member model, the vertical direction of the cast loop is in a spiral shape, several spiral runners are uniformly distributed at the peripheral part, a cast port is communicated to the upper end of the cast loop, a vertical type casting method is employed while casting, iron liquid is slowly dumped from the cast port, the iron liquid is uniformly introduced in a cavity through the cast loop with 360 DEG, the liquid level is spirally rotated and upwardly floated to the upper end of the model, and then cooled for moulding. The annular long casting member spiral shower casting method overcomes the disadvantages of the prior art, employs the vertical type casting method, and employs the single layer or multilayer spiral shower casting method, iron liquid can be endured for entering the cavity with 360 DEG C, the liquid level is spirally rotated and upwardly floated, so that slag inclusion and impurity in the iron liquid can smoothly discharged to a cap port, the casting quality can be guaranteed, and the yield is increased.

Description

technical field [0001] The invention relates to the technical field of casting processing, in particular to a spiral rain pouring method for annular long castings. Background technique [0002] When casting high-carbon (carbon > 2.0 or more) ring parts with a length of more than 800mm, it is more difficult to cast. Because of its structural characteristics of large diameter, thin wall and complex structure, cracks are prone to occur after casting. Annular castings have a closed structure, which generates large stress during solidification and is not easy to release. When hindered by sand cores, deformation or cracks are very easy to occur, and even lead to scrapping of castings, which brings economic losses to the foundry; poor compactness, Impurities in molten iron are not easy to remove during casting. Contents of the invention [0003] The object of the present invention is to provide a spiral rain pouring method for annular long castings, which overcomes the short...

AI Technical Summary

Problems solved by technology

Because of its structural characteristics of large diameter, thin wall and complex structure, cracks are prone to occur after casting

Annular castings have a closed structure, which generates large stress during solidification and is not easy to release. When hindered by sand cores, deformation or cracks are very easy to occur, and even lead to scrapping of castings, which brings economic losses to the foundry; poor compactness, Impurities in molten iron are not easy to remove during casting

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