In the resin sand molding and water glass sand molding, although the strength of the two processes is very high, sand and blisters may occur in the casting.

The reason for the sand and blisters in the castings is that the sand in the sand is not clean and there is residual sand. During the casting process, the molten iron washes the sand of the sprue wall.

Some manufacturers use paint to prevent and take better results, but there will still be sand and sand in the castings. First, it is difficult and difficult to paint the gate. The second is that during the pouring process, the pouring temperature is high, the scouring is large, and the coating is easy to fall off under the scouring and high temperature immersion. Causes sand and sand to be trapped. Many casting factories have not paid much attention to the runners. The erosion of the sprue wall during the casting process is neglected. As a result, the castings are sanded and sanded.

How to solve the problem of sand and blisters in castings

1. Improve the yield of castings, improve the quality of castings, and reduce the total cost of castings.

2, using cast gate ceramic tube, this product is easy to use, has smooth circulation, resistant to molten iron, molten steel, does not absorb molten steel, good sawability, etc., can simplify the molding process, save the difficult work of coating on the inside of the gate And improve the layout of the casting system to avoid casting sand, sand holes, sanding defects. It plays a great role in improving the quality of castings and the yield of castings, especially in various self-hardening casting shapes.

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Label: How to solve the phenomenon of sand and blisters in castings

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