Stand pillar double dead head type sand casting die

Abstract

The invention particularly relates to a stand pillar double dead head type sand casting die which comprises a lower die and an upper die. A casting lower die cavity, a lower dead head neck die cavityand a lower stand pillar die cavity are formed in the lower die. One end of the lower dead head neck die cavity is connected to the casting lower die cavity, and the other end of the lower dead head neck die cavity is perpendicularly connected to the lower stand pillar die cavity. A casting upper die cavity, an upper dead head neck die cavity and an upper stand pillar die cavity are formed in theupper die, one end of the upper dead head neck die cavity is connected to the casting upper die cavity, and the other end of the upper dead head neck die cavity is perpendicularly connected to the upper stand pillar die cavity. The top end face of the upper die is provided with a dead head, and the dead head is installed in one end of the upper stand pillar die cavity. By means of the stand pillardouble dead head type sand casting die, the structure is simple, feeding can be conducted on an upper heat joint and a lower heat joint through one dead head, a channel of heat joint feeding for a casting is smooth, the feeding pressure is large, the problem that defects of shrinkage porosity, shrinkage cavities and the like exist in an existing technology is solved, the casting quality is improved, the production cost is reduced, and the quality of a produced casting is stable.

Description

technical field [0001] The invention belongs to the technical field of sand casting moulds, in particular to a sand casting mould, which is a stand column double riser type. Background technique [0002] Due to the structure and casting parameters, the solidification time of molten iron at each point in the casting cavity is not equal, which will cause thermal stress to the casting after solidification, that is, the appearance of hot spots, which will easily cause casting deformation, Cracks, etc.; at the same time, due to the unequal cooling and solidification time, the castings will have defects such as shrinkage porosity, shrinkage cavity, cold shut, and pores. [0003] In the pouring process of existing castings, risers are generally designed at the positions of hot joints to achieve the effect of feeding. However, when there are upper and lower hot joints in the structural design of the casting, the risers commonly used in the casting process design generally place a r...

AI Technical Summary

Problems solved by technology

However, when there are upper and lower hot joints in the structural design of the casting, the risers commonly used in the casting process design generally place a riser on the upper and lower hot joints, but often due to the shape of the hot joint area located in the lower layer of the casting Irregular parts or space are too narrow to design and install the riser. Even if it is barely placed, the heat dissipation conditions of the position will be poor. Castings produce shrinkage cavity and shrinkage defects, which will increase the repair cost of castings, and may also cause scrapping, affecting the quality of castings

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