Lost foam casting technology has the advantages of wide application range, accurate size and shape of lost foam casting, smooth surface, convenient mechanized production, low production cost, free design, high production efficiency, clean production, green casting and so on. In recent years, with the deepening of the research on...
1.Effect of the amount of suspending agent on the properties of spray casting coating Based on the basic research and development experiments, the effects of different addition amounts of Attapulgite on the properties of casting coatings were investigated. The addition amount of attapulgite directly affects the suspension stability, shear...
1.Raw materials and instruments 1.1 Raw materials White corundum , attapulgite, CMC (sodium carboxymethyl cellulose), PVA (polyvinyl alcohol), efka 3288, zinc oxide, sodium pentachlorophenol, silicone defoamer and other additives are all industrial grade. 1.2 Instruments Zmd-550 dispersion sand mill, tu-4 cup, NDJ-5S rotary viscometer, gas evolution...
With the development of the casting industry, the casting coating also began to change from the traditional alcohol-based casting coating to water-based casting coating. Especially in recent years, the casting industry began to set off a green wave, and the water-based casting coating with low pollution and low energy...
Among all the components of water-based lost foam casting coating for cast iron, refractory aggregate is the main part. The most commonly used refractory aggregate is quartz powder, followed by bauxite, kaolin, talc, graphite powder, corundum powder, wollastonite and other refractory aggregates. When a single refractory aggregate is used,...
1. Water based lost foam casting coating test materials Bauxite: the main mineral composition is mullite, which has the advantages of small thermal expansion coefficient, high fire resistance, good chemical stability and low price. The particle size is 325 mesh; Kaolin: the main mineral composition is SiO2 and Al2O3....
Drying is the process of removing the carrier from the coating. The sand core should be dried in time after coating. Otherwise, the water (carrier) will react with the cold core resin group, which will reduce the coating strength of the sand core surface and cause quality problems in...
Suspensibility refers to the ability of coating to resist stratification and precipitation of solid refractory powder. On the premise of ensuring other properties, the higher the suspensibility, the better. Good suspension, uniform coating, no flow, simple operation, easy drying, high strength and no cracking after drying. There are many...
In order to effectively solve the problem of core breaking during sintering of water jacket and oil passage of cylinder block, ZHY casting’s water jacket and oil passage sand core are mixed with a certain proportion of ceramic sand (70 / 140 mesh). The ceramic sand is smooth and...
Uniform and stable coating composition is the basis to ensure the coating process performance, which belongs to static control for the user, and the stability of incoming materials is guaranteed by the coating supplier. However, due to the change of water evaporation, refractory powder segregation, viscosity and density, it...