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According to the difference in casting output, that is, […]
According to the difference in casting output, that is, the number of times that the casting mold is used, wood, plastic, aluminum alloy cast iron and steel can be selected respectively.
Wood molds are still widely used in manual molding or single-piece small-batch production, but as environmental protection requirements become more stringent, the use of wood will be increasingly restricted, and solid casting will be used instead. The real casting uses foam plastic sheet as the material, cut and bonded to make a pattern, and then poured into a casting.
Compared with the use of wooden molds, this method not only saves wood, but also makes castings have higher dimensional accuracy and better surface roughness. The application of plastic molds is on the rise, especially the marketability of plastics and the life of plastic molds. The improvement has made the application of plastic molds increasingly widespread.
Aluminum alloy molds are still widely used due to their light weight and high dimensional accuracy. However, there has been a decreasing trend in recent applications, and some areas have been replaced by plastic molds (when casting batches are smaller) or cast iron molds (when casting batches are larger), respectively.
Cast iron molds are still the first choice for large-scale casting production and are widely used. It has the advantages of high strength, high hardness, wear resistance, good processability, low cost and long service life. In recent years, due to the improvement of casting level, more and more patterns, mold base plates, pattern frames, etc. have been made of ductile iron or low rare earth alloy gray cast iron with higher strength and wear resistance, and the heat fatigue resistance Better vermicular graphite cast iron is also used for core box materials.