Sand mold casting mold and casting method thereof

Abstract

The invention discloses a sand mold casting mold and a casting method thereof. Acooling device of the sand mold casting mold is located on the side wall of a hot spot area of a casting cavity of the mold, wherein according to the temperature change of hot spots, the cooling device regulates a chilling level, and the higher the chilling level, the higher the temperature reduction rate of the hot spots. According to the sand mold casting mold, the problems of solution drying during pouring and heat checking of the casting surface during solidification can be avoided, it can be ensured that the hot spots with the different sizes solidify simultaneously, and the problems of casting shrinkage porosity and shrinkage cavity are solved.

Description

technical field [0001] The invention relates to the field of sand casting, in particular to a sand casting mold and a casting method. Background technique [0002] In sand casting, due to the casting structure and casting parameters, the solidification time of the molten iron at each point in the cavity is not equal, which creates a hot spot, that is, during the solidification process of the molten iron, the inner part of the casting is smaller than the surrounding area. A node or localized area where metal solidifies slowly. [0003] For castings made of nodular iron, gray iron, etc., the self-feeding of the casting is realized by the expansion of graphite precipitation. Since the iron casting has graphite precipitation during the solidification process, the volume expansion of graphite can be supplemented by the solidification of the iron casting. The volume decreases during shrinkage, so cast iron parts can achieve self-feeding. [0004] However, due to the existence of...

AI Technical Summary

Problems solved by technology

This solution has the following disadvantages: For castings with complex structures, the number of risers required is relatively large, resulting in an increase in the cost of disposable riser insulation materials and increased production costs; it cannot guarantee that the problem of shrinkage porosity of castings can be solved, and the casting process still remains shrinkage defect

Images