Analysis of casting molding material

Web Design And Seo For www.china-webdesign.com

casting plant - China Manufacturer

Thank you for inquiry my casting plant, Tel:0086-574-27851019 E-MAIL:thomas@steel-casting-forging.com

http://www.steel-casting-forging.com/key-casting-plant-45/

Manufacture of cast materials used as a molding material, mainly referring to the sand and core sand. It consists of sand, binder and additives. Molding material. Performance should have the follo wing points.steel casting foundry

1) plasticity. Sand under loads can shape forming, and still maintain the shape of the external force when the stress is removed, this performance is called plasticity. Good plasticity, easy to shape, to get a clear cavity of the mold, thus ensuring the casting has a precise outline of the size. 2) strength.
steel castings manufacturers
Sand to withstand external force and easy to damage the performance called strength. The mold must be of sufficient strength to withstand the impact and pressure of the molten metal so that when pouring, thus preventing the deformation and damage, such as sand, collapse the box, etc., in order to prevent casting defects such as gravel, sand holes. investment casting
3) fire resistance. Sand in the high-temperat ure liquid metal under the action does not soften, melt sintering and adhesion in the casting surface on the performance of as fire resistance. Poor fire resistance will cause the casting surface, sticky sand, increase the difficulty of cleaning up and cutting; serious cases will make casting scrap.
 4) permeability. The ability to sand compaction enables gas through is called the permeability. When the molten metal poured mold under high temperature, the sand in large quantities of gases within the molten metal will be isolated from the gas. If poor ventilation, and will produce some gas left in the molten metal can not be ruled out, casting porosity and other defects.
5) concessions. The sand cooling and contraction, the volume of sand and core can be compression performance called concession. When the concession is poor, the casting shrinkage difficulties will lead to stress within the castings produced cattle, which occurred in deformation or cracks and o ther defects, even when serious casting will break.steel castings