<center id="nbin5"></center> 1) The resin sand mold has good rigidity and high sand mold strength in the initial stage of casting. This makes it possible to use the graphitization expansion of the cast iron solidification process to effectively eliminate shrinkage and shrinkage defects, and to achieve fewer and no risers for gray cast iron and ductile iron parts. Casting.
2) In the production of solid castings, polystyrene foam patterns are used to form furo-resin self-hardening sand. When the molten metal is poured into the mold, the foamed plastic pattern quickly vaporizes under the action of the high-temperature molten metal, burns and disappears, and the molten metal replaces the original foamed plastic position and cools and solidifies into a solid casting with the same shape as the pattern.
3) Relatively speaking, lost foam casting has great advantages over traditional sand molds for the production of single or small batches of automobile covering parts, machine bed and other large molds. It not only saves expensive wood mold costs, but also facilitates operation. , It shortens the production cycle and improves the production efficiency. It has the advantages of high dimensional accuracy, small machining allowance, and good surface quality. In addition, the casting machine tool has good wear resistance and shock absorption performance and good process performance.
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