Casting Starch 80mesh High Quality Corn Pregelatinized Starch

The addition of alpha starch can improve the toughness and surface strength of molding sand: reduce the friction force of mold starting and reduce the sensitivity of water; prevent the casting from producing sand adding, scarring, sand washing, sand hole and other defects; reduce the surface roughness of the casting.In recent years, foreign enterprises have entered China in the form of sole proprietorship and joint venture, and their molding sand technology has also entered China. The localization of raw materials required by these enterprises has promoted the development of alpha starch enterprises in China.Alpha starch is widely used in foundry industry as additive material in wet sand.Alpha starch can improve the properties of molding sand loose heald, reduce the rejection rate and improve the surface gloss of casting. 
1.The anti - sand action of alpha starch is obvious.Therefore, it can replace the double amount of pulverized coal to prevent the defects of sticky sand and reduce the surface roughness, so as to improve the working environment.
2.Alpha starch can improve the thermal and wet tensile strength of sand mold, the surface of sand mold after the thermal burning of alpha starch produces pores, can slow down the thermal expansion of quartz sand, so as to improve the sand resistance of sand, prevent sand casting production.
3.Alpha starch can reduce the friction resistance between the molding sand and the shape, improve the toughness of the molding sand, improve the molding sand mold, and significantly reduce the molding waste rate due to bad mold mold.
4.Dry sand due to surface water loss caused by surface strength decline and easy wear and tear, casting is easy to be erosion, placed for a long time or the weather is relatively dry, the problem is more serious sand added alpha starch can improve the surface strength of sand, improve the ability to dry and iron impact.Can prevent sand, sand hole defects.The effect is more obvious with starch with higher alpha fineness.
5.Alpha starch can significantly reduce the sensitivity of sand mold to water, reduce the water content of sand and improve the compaction rate of sand mold, so that sand mold is easier to model and greatly reduce the porosity defects caused by high water content of sand mold.Improve practicality and facilitate modeling.
6. Alpha starch can reduce the temperature of molding sand and improve the properties of molding sand.
Alpha starch is easy to use and can be added in small quantities, usually 0.5-1.0%.Mix sand line according to the original process can be mixed evenly.