Lost foam casting
Lost foam casting enterprises have been affected by many factors in recent years, resulting in the low qualified rate of finished castings. Among them, the characteristics of high production cost, high defective rate and low quality of castings have become the three mountains of lost foam casting enterprises in China. How to solve these problems solving the cost performance of foundry products as soon as possible has become one of the most important tasks for domestic foundry enterprises. As we all know, the selection of molding sand in the casting process is a crucial link in the whole process. Once the sand is improperly selected, it will affect the overall situation. Therefore, EPC enterprises should pay more attention to the selection of molding sand.
Using some characteristics of Fused Ceramic sand in lost foam casting can increase the yield of castings, reduce the cost and improve the labor environment. Lost foam casting is a dry sand negative pressure molding. For many castings, the included angle, long and thin holes and complex inner cavity parts, the sand is not easy to be (vibrated) enriched, and the fire resistance temperature is not enough, it is easy to produce sintering or iron coated sand in these parts. From the characteristics of Fused Ceramic sand mentioned above, it can be seen that Fused Ceramic sand can easily solve these problems.
According to relevant data, at present, most domestic foundry enterprises have improved the selection of molding sand, abandoned the traditional low-cost quartz sand or forsterite sand, and adopted a new type of Fused Ceramic sand to improve the casting problem. This new type of sand is the product of the combination of school and enterprise, which integrates the advantages of high fire resistance, good fluidity and high air permeability, To a certain extent, it has solved the defects in the casting production, so it has been widely concerned by the international casting industry and has become the new favorite of lost foam casting. The three major problems of casting cost, defective rate and quality of lost foam casting enterprises have been effectively alleviated. At the same time, Fused Ceramic sand has also been loved by many enterprises.
Application conclusion of Fused Ceramic sand
Fused Ceramic sand is a non-silica artificial sand, which is suitable for various casting methods; Such as: V method, VRH, lost foam, investment molding, general sand mold (clay sand, sodium silicate +CO2 hardening), resin sand, etc. It is applicable to the production of castings with various binders and metal materials. It can not only greatly improve the quality of castings, but also is easy to clean sand, and the sand mixing process is simple and convenient (a small batch of sand is used locally for a single piece in a large steel casting plant, and a small amount of sand can be mixed manually), especially suitable for the production of castings with high quality requirements.
Fused Ceramic sand has good recycling performance, low requirements for sand treatment equipment, low energy consumption and low cost of sand treatment. The sand recovery rate reached 98%. Less casting waste is generated. Due to the absence of binder, the sand reclamation rate is higher and the cost is lower, reaching 1.5 ~ 2kg/t of sand consumption for castings.
With the development of foundry industry and the requirements of social environmental protection, more and more manufacturers will use Fused Ceramic sand locally and completely. It has been known as environmental protection casting material and has a good prospect of popularization and application.