Sand core with blind riser

Abstract

The invention discloses a sand core with a blind riser. The sand core comprises a sand core body and the blind riser arranged in the sand core body, wherein the sand core body is provided with an inserting groove which communicating with the blind riser, and a side core plate used for sealing the inserting groove is inserted into the inserting groove. According to the sand core with the blind riser with the above structure, the inserting groove communicating with the blind riser is formed in the sand core body, so that the blind riser forms a passage, and residual materials can be convenientlyremoved in the mode of blowing air and the like; and the sand core with the blind riser has the advantages that operation is convenient, the sand removal effect is remarkable, and the product qualityis greatly improved.

Description

technical field [0001] The invention relates to a sand core with a dark riser. Background technique [0002] In the casting process, after the molten metal is poured into the mold, due to cooling and solidification, it changes from liquid to solid, resulting in volume shrinkage. When volume shrinkage cannot be replenished by molten metal, shrinkage cavities and shrinkage porosity will occur in the parts with larger modulus in the casting after solidification. For those casting alloys with large volume shrinkage, this defect often occurs. Shrinkage cavity and shrinkage porosity will reduce the compactness of castings, reduce the effective cross-sectional area of ​​castings, and greatly reduce the mechanical properties. Therefore, it is necessary to control solidification and prevent defects. [0003] The use of risers is currently the most effective and popular process measure to control solidification and compensate shrinkage in the foundry industry. The riser can be divi...

AI Technical Summary

Problems solved by technology

[0004] However, in the existing 3D printing sand core process, when using a hidden riser, it is difficult to clean the sand core, and the coating is easy to accumulate, which affects the feeding effect of the dark riser, and is prone to sand inclusion, sand washing and fire choking. situation, which will eventually affect the quality of the casting

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