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Product Categories:Casting Parts
Product Technology:Lost Foam Casting

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Product Feature

Lost foam casting (also known as real mold casting) is made of foam plastic (EPS, STMMA or EPMMA) polymer material into a real mold with exactly the same structure and size as the parts to be produced and cast, and is dip-coated with refractory coating (strengthened) , smooth and breathable) and dried, it is buried in dry quartz sand and subjected to three-dimensional vibration modeling. The molten metal is poured into the molding sand box under negative pressure, so that the polymer material model is heated and vaporized, and then extracted. A new casting method that uses liquid metal to replace the one-time mold casting process formed after cooling and solidification to produce castings.         Lost foam casting has the following characteristics: 1. Castings are of good quality and low cost; 2. Materials are not limited and suitable for all sizes; 3. High precision, smooth surface, less cleaning, and less machining; 4. Internal defects are greatly reduced and the structure of the casting is improved. Dense; 5. It can realize large-scale and mass production; 6. It is suitable for mass production casting of the same castings; 7. It is suitable for manual operation and automated assembly line production and operation control; 8. The production status of the production line meets the requirements of environmental protection technical parameters. ; 9. It can greatly improve the working environment and production conditions of the casting production line, reduce labor intensity, and reduce energy consumption.   

Product Description

1. Vacuum low pressure lost foam casting technology. It combines the technical advantages of low-pressure casting and vacuum lost foam casting, completes the filling process under controllable air pressure, and greatly improves the filling ability of the alloy. Compared with die casting, the equipment investment is small, the cost is low, and the castings can be strengthened by heat treatment; compared with sand casting, the castings have high precision, low surface roughness, high productivity, and good performance. Under the action of anti-gravity, the sprue becomes a shortening channel, and the loss of pouring temperature is small. The pouring system of alloy castings is simple and effective, with high yield and dense structure. The required pouring temperature is low and is suitable for pouring and forming of various non-ferrous alloys. .

2.Pressure lost foam casting technology. It combines lost foam casting technology with pressure solidification crystallization technology. Its principle is to pour molten metal into a pressure tank with a sand box to make the foam mold gasify and disappear, then quickly seal the pressure tank and introduce gas at a certain pressure. , causing the molten metal to solidify and crystallize under pressure. The characteristic of this technology is that it can significantly reduce casting defects such as shrinkage cavities, shrinkage porosity, and pores in castings, increase the density of castings, and improve the mechanical properties of castings. Solidification under external pressure can cause microscopic deformation of the initially solidified dendrites, greatly improving the riser feeding capacity and improving the internal shrinkage of the casting. At the same time, the pressure increases the solubility of gas in the solid alloy, making it possible to precipitate. The bubbles are reduced.

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