Gu'an sand casting direct sales copper castings

Sand casting is the production of castings using clay-bonded sand as modeling material. It is a process with a long history and the most widely used process. Speaking of its long history, it can be traced back to thousands of years ago, and its range of applications can be said to be used everywhere in the world.
Sand foundry is a production method in which molten metal is poured into the mold cavity to cool and solidify to obtain a product. In the automobile manufacturing process, many parts made of cast iron blanks account for about % of the total vehicle weight, such as cylinder blocks, transmission cases, steering gear housings, rear axle housings, brake drums, various brackets, etc. Sand molds are usually used to manufacture cast iron parts. The raw material of sand mold is mainly sand and mixed with binder, water, etc. The sand mold material must have a certain bonding strength so that it can be molded into the desired shape and can withstand the erosion of high-temperature molten iron without collapsing. In order to mold a cavity in the sand mold that matches the shape of the casting, a model must first be made of wood, called a wooden mold. The volume of the hot molten iron will shrink after cooling, so the size of the wooden mold needs to be increased based on the original size of the casting according to the shrinkage rate, and the cutting surface needs to be thickened accordingly. Hollow castings need to be made into sand cores and corresponding core wooden molds (core boxes). With the wooden mold, the cavity sand mold can be made.