Control sand temperature and install sand temperature adjustment device

The pouring temperature is too high. Large holes flow out to ensure rapid, smooth and dispersed casting of molten metal. The sand is coarse and the grain size is too concentrated.Use the principle of high temperature tapping and low temperature pouring to control reasonable pouring temperature. The structure of aluminum castings is complex and the shrinkage resistance is large. Multi-screen sand is selected, chrome sand or zircon sand can be used for cast steel or cast iron thick parts.

Furan resin sand has poor high-temperature retreatability, especially for steel castings that are prone to cracks. The moisture in the paint is too high, the paint is too much, and the drying is insufficient. The core bone is reduced and the core bone should be simple. c. d. To improve the regressivity of molding sand, add wood flour, EPS beads, and hollow clay cores into the sand. The molding sand exceeds its usable time and the sand temperature is too high. Control the water content in the coating <5%, and control the alcohol water content.The mud core bone is too large to prevent contraction.

Reduce the amount of resin and curing agent added, choose a resin with a small amount of gas, and add silane (2% by weight of the resin) to the resin.  Fortify crack bars, negotiate with the buyer, and modify the casting structure. The compactness of the sand mold and core is not enough, the surface of the mold is loose, and the strength is low.Alloy steel materials are easy to crack.Casting Automotive Mould Manufacturers Attention must be paid to the compactness of the sand under the convex platform and under the movable block, and the compactness of the sand at the recesses and coers should be improved.

Control sand temperature and install sand temperature adjustment device.The coating layer is too thin or missed, the penetration of the coating is too shallow, and the refractoriness of the coating is not high. Strengthen old sand regeneration and dust prevention, sand buing loss for cast iron ≤ 3%, sand buing loss for cast steel ≤ 2%, and fine powder content (200 mesh + chassis) ≤ 0. Prevention method a