Bed frame casting (II)

Bed frame casting
Advantages of resin sand casting machine bed castings: 1. The resin sand mold has good rigidity and high initial strength during casting, which allows for the effective elimination of shrinkage and porosity defects by utilizing the graphitization expansion during the solidification process of cast iron, achieving less riser and no riser casting of gray cast iron and ductile iron parts. 2. In the production of solid casting, polystyrene foam molding is used, and the self hardening sand molding with rosin resin is applied. When the molten metal is poured into the mold, the foam plastic pattern will quickly vaporize under the action of the highly random molten metal, burn and dissipate. The liquid metal replaces the position occupied by the original foam plastic, and is cooled and solidified into a full mold casting with the same shape as the pattern. 3. Relatively speaking, lost foam casting has great advantages over traditional sand molds for producing single or small batches of automotive coverings, machine tool beds, and other large molds. It not only saves expensive wood mold costs, but also is easy to operate, shortens production cycles, improves production efficiency, has high dimensional accuracy, small machining allowances, and good surface quality.