sand mold is a model used for foundry, that is, the model used for molding, including wood mold, metal mold, resin mold, plastic mold. The metal mold also includes aluminum mold, iron mould, steel mould and so on. What we call aluminum alloy foundry is also mainly used for metal film. The main reason for casting aluminum parts is sand mold casting, mainly because of the low cost of sand casting compared with other casting methods, simple production process and short production cycle. Hongcheng is Hangzhou aluminum foundry foundry, providing aluminum sand casting process.
    aluminum sand casting technology used in the industry is very much, in the entire casting process, there is no need for one thing, casting sand. A granular refractory material used for moulding sand and core sand in foundry production. In the case of clay as a molding sand binder, about 1 tons of new sand should be supplemented for every 1 tons of qualified aluminum castings, so the amount of casting sand in sand casting production is the greatest. The early use of natural silica sand containing clay is mountain sand and river sand. It has good plasticity and can be used directly to make mould and core. It is suitable for the conditions of manual production at that time. After the large-scale production of industrial castings, especially after the molding mechanization, the homogeneity of the properties of the natural silica sand containing clay is poor, the quality of the molding sand is difficult to control and can not meet the requirements of the process. Therefore, the sand plant has been washed, scrubbed and selected, and all kinds of high quality silica sand are obtained. Or the broken silica sand made of silica.