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What is the effect of pouring temperature on castings?
2023-02-17Too high pouring temperature will cause the sand mold to swell, especially for gray cast ironcastings with complex sand cores. When pouring temperature is ≥1420℃, the waste will increase, and when pouring temperature is 1460℃, the waste wil...
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Analysis on the phenomenon and causes of sand sticking in castings
2023-02-02In the process of casting castings with foundry sand or coated sand, if you are not skilled in the casting process, there may be sand sticking on the castings. Once this happens, the appearance quality of the castings will be affected, and the castin...
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Casting defects in investment casting and their solutions
2023-01-07Casting size tolerance1The influence of molding materials and molding process on casting size
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The mold size deviation is mainly caused by the stability of the mold making process department, such as mold closing force, wax pressing temperatu... -
Key points of investment casting operation
2022-12-23Advantages of investment castingThe dimensional accuracy of investment castings is high, generally reaching CT4-6 (CT10~13 for sand casting and CT5~7 for die casting). When pressing investment, the molding with high cavity surface finish is...
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Investment casting process
2022-12-071Development history of investment castingInvestment casting is also called lost wax casting. The history of investment casting can be traced back to 4000 years ago. It originated from Egypt, China and India at the earliest. It was found in the ...
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How to quickly find out the cause of pores in castings?
2022-03-27I. What’s casting porosity?Features: The pores in the casting refer to the smooth pores of varying sizes that exist inside or near the surface of the casting. The pore wall often has an oxidized color. Due to the different sources and f...
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How to solve the problem of Casting porosity?
2022-03-271.1invasive stomata(1) Reduce the amount of gas generated: Control the content of gas-generating substances in the molding sand orcore sand. The moisture content of the wet molding sand should not be too high, and the amount of release agent and ...
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What is the Stress?How to relieve it?
2022-03-27Annealing heat treatment or tempering heat treatment is often used in production to eliminate stress, to prevent all kinds of adverse effects of stress, but the reality is often unsatisfactory, heat treatment can not completely eliminate stress...
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What is Trachoma, slag hole and Shrinkage?
2022-03-27Trachoma, slag holeFeatures: The small holes inside or on the surface of the defect are filled with type (core) sand, called trachoma. If the shape of the defect is irregular and the inside is slag or inclusions, it is called a slag hole.
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