Vacuum casting is a kind of physical molding casting method, which adopts dry sand molding without moisture, binder and any other additives, and maintains a certain negative pressure during pouring and solidification. Compared with the traditional casting technology,can reduce the labor intensity of molding and casting cleaning. The castings produced by v-casting have the advantages of good surface quality, accurate size, low production cost compared with resin sand, and significantly improved production efficiency.
The main production equipment ofprocess casting includes: vacuum molding machine, mobile drying rack, vacuum negative pressure equipment system, sand treatment production line, dust removal system, special sand box, 1 t induction furnace, 1 t spheroidizing ladle, 10 t crown block, four axis three linkage horizontal CNC, etc.
Special sand box size: upper sand box is 1 550 mm × 1 400 mm × 450 mm, lower sand box 1 550 mm × 1 400 mm × 600 mm。
The production process of vacuum casting process casting is: mold making → V-process molding → pouring → cooling → cleaning → primary inspection → painting → processing → secondary inspection → painting → warehousing.
The surface of the forklift front axle castings produced by vacuum casting method casting process is smooth, and there are no shrinkage cavity and loose defects in the castings after destructive inspection. The mechanical properties and dimensional accuracy fully meet the technical requirements of the drawings. Compared with resinprocess, v-casting process can improve the surface quality of castings, improve the production efficiency and reduce the production cost.