casting grade bentonite

Bentonite clay for casting

Bentonite clay is applied in casting, mainly in clay bonded sand, since bentonite clay has features such as strong binding property, high plasticity, good membrane removal property, high air permeability and stable physical and chemical properties under high temperature wet condition. Nowadays, along with rapid development of various chemical bonded sands, the clay wet-type sand is still the foremost modeling material, whose application scope is wide, consumption is huge, and other materials cannot compare with it. New modern techniques such as high pressure modeling, injecting pressure modeling, air blast modeling, static pressure modeling and non-shock vacuum pressure adding modeling, use the clay wet-type sand as premise, and the clay wet-type sand has extremely strong ability in suiting modeling conditions.

I. Product summary

The bentonite products produced by our company have good cohesiveness, expansibility, fire resistance and plasticity. They are resistant to sand inclusion, scab, sand hole and collapse. Meanwhile, the utility model has the advantages of high strength, high temperature resistance, high reusability, low adding quantity, good sand permeability, etc., so as to improve the surface smoothness of castings, guarantee the quality of castings and improve the yield. Because of its strong formability, high degree of cavity, easy pouring of metal solution, wet and dry model, it is the preferred molding sand binder for precision casting.

II.?Product characteristic

The product is white powder, and has characteristics such as good binding property, hydrophilicity, expansibility, plasticity, lubricity and base interchangeability.

III. Advantages

(1)Quality and performance indexes are stable. Wet pressure, hot and humid pulling strength indexes are high, meanwhile, blue absorption power and bentonite value can ensure “two highs” , and uneven phenomenon has not occurred.

The high-temperature resistance is good. During the casting process, molding sand has to be through a certain high temperature condition. Therefore,?heat resistance and binding property of the bentonite clay kept under high temperature become an important index for measuring the casting bentonite clay.