What is bed casting

Advantages of using resin sand molds to cast machine bed castings:
1) The resin sand mold has good stiffness and the sand mold has high strength in the initial stage of pouring. This makes it possible to utilize the graphitization expansion of the cast iron solidification process to effectively eliminate shrinkage cavities and shrinkage porosity defects, and achieve less and no risers in gray cast iron and ductile iron castings. Casting.
2) In the production of solid mold casting, polystyrene foam molding is used and Furbo resin self-hardening sand is used for molding. When the molten metal is poured into the mold, the foam plastic pattern quickly vaporizes under the action of high-temperature molten metal, burns and disappears. The molten metal replaces the position originally occupied by the foam plastic, cools and solidifies into a full-shaped 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 pieces or small batches of automobile panels, machine tool beds and other large molds. It not only saves the cost of expensive wood molds, but is also easy to operate. , shortens the production cycle, improves production efficiency, has the advantages of high dimensional accuracy, small machining allowance, and good surface quality; in addition, casting machine tool processing has good wear resistance, shock absorption performance, and good process performance.