Lost mold casting (lost foam process ( USA ) ,policast process ( Italy ) ) is made of foam plastic (EPS, STMMA or EPMMA) polymer material into a solid mold with the same structure and size as the parts to be cast. After dipping refractory paint (to strengthen, smooth and breathable) and drying, it is buried in dry quartz sand through three-dimensional vibration modeling. The casting molding sand box is poured into molten metal liquid under negative pressure, so that the polymer material model is heated and gasified out, and then replaced by liquid metal after cooling and solidification.
Compared with the traditional casting technology, the lost mold casting has the following characteristics: 1, casting quality is good, low cost; 2, the material is not limited, the size is appropriate; 3, high precision, smooth surface, reduce cleaning, save machine; 4, the internal defects are greatly reduced, the casting organization is dense; 5, can achieve large-scale, mass production; 6, suitable for mass production casting of the same castings; 7, suitable for manual operation and automatic production line operation control; 8. The production state of the production line meets the requirements of environmental protection technical parameters; 9, can greatly improve the working environment and production conditions of the casting production line, reduce labor intensity, reduce energy consumption.
