Molding conditions and surface quality of sand casting
Sand casting is mainly used in the process of operating the clay bonded sand casting molding materials production, the processing method has a long history and is also the most widely application scope process method, in all kinds of chemical bond development today, the modelling of the coatings for green sand is still the most important material, its applicability is wide and consumption is big.
Adapt to the modelling of conditions set out in the sand casting ability is very strong, is also a feature of the coatings for green sand, modern high-pressure modelling, molding, air impact modelling, static modelling and new technology, such as no shock vacuum pressurized modelling also is to use the premise of clay green sand.
Now, with the continuous development of science and technology, the demand for the casting industry department in continuous growth, at the same time, more and more high to the requirement of casting quality, modern foundry, its modelling equipment production efficiency has reached an unprecedented level.
The casting mould used in sand casting is usually composed of external sand type and core. In order to improve the surface quality of castings, a coating is often applied on sand and core surface. The main components of the coating are high refractories, high temperature and chemical stability, powder materials and binder, as well as a convenient carrier and various additives.
Steel, iron and most non-ferrous alloy castings are available in sand casting. Because of sand mold casting molding materials used in the cheap, simple mould manufacturing, piece of casting production, the batch production and mass production are able to adapt to, for a long time, has been the basic technology of casting production.http://www.pump-casting.com/