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Casting industry, folk handicraft industry.Foshan is the most developed foundry industry, and the division of labor, strict industrial rules.That is, there are cast copper, cast iron;Copper casting can be divided into four categories: household bronze ware, machinery bronze ware, zhongding bronze ware and one-word bronze ware.Among them, the casting of household copper ware is the strictest. There are many kinds of casting, according to the molding method is traditionally divided into: (1) ordinary sand casting, including wet sand, dry sand and chemical hardening sand 3 categories.(2) special casting, press molding materials and can be divided into natural mineral sand as the main special casting molding materials (e.g., investment casting, mold casting, shell mold casting foundry, negative pressure casting, mold casting, ceramic mold casting, etc.) and metal as the main mold material of special casting (such as metal mold casting, pressure casting, continuous casting, low pressure casting, centrifugal casting, etc.).Casting process usually includes: (1) cast (containers) makes liquid metal solid casting, casting according to the materials can be divided into sand mold, metal, ceramic, mud, graphite, etc., can be divided by use disposable, semi permanent and permanent type, mold preparation quality are the main factors influencing the casting quality;(2) casting metal melting and pouring, casting metal (casting alloy) mainly cast iron, cast steel and casting non-ferrous alloy;(3) casting treatment and inspection, casting treatment including removal of mold core and casting surface foreign matter, removal of pouring riser, shovel grinding burr and seam and other protrusions, as well as heat treatment, shaping, rust prevention treatment and rough processing. Casting process can be divided into three basic parts, namely, casting metal preparation, mold preparation and casting treatment.Casting metal refers to the metal material used in casting production for casting casting, which is an alloy composed of metal elements as the main component and adding other metal or non-metallic elements. Traditionally, it is called casting alloy, mainly including cast iron, cast steel and cast non-ferrous alloy. Precision casting refers to the process of obtaining accurate size casting.Compared with the traditional sand casting process, the casting size obtained by precision casting is more accurate and the surface finish is better.It includes investment casting, ceramic casting, metal casting, die casting, and epc. Precision casting is also called lost wax casting, its products are precise, complex, close to the final shape of the parts, no processing or very little processing on direct use, is a near net form of the advanced technology.
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