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Knowledge of machine tool castings casting process
2014-12-20 15:58      Come from:Botou city in Europe Keyue Machinery Co., Ltd.

Knowledge of machine tool castings casting process

Machine tool castings is mainly used for machine platemanufacturing, accept a simple casting process. In order to make full use of low pressure casting liquid metal under pressure from the bottom of Shangdi feeding casting, inprocess design, should consider to use.

Low pressure casting is a casting method to make the liquidmetal filling cavity and solidification process under pressuretwo casting. Because of the relatively low pressure(20~60kPa), so called low pressure casting. Machine tool castings the process is: in the sealed crucible (or sealed cans), access to dry compressed air, liquid metal under the action of gas pressure, along the riser tube into the sprue 3 rises through the ingate 2 smoothly into the cavity 1, and keep the gas pressure inside the crucible on the surface,until completely solidified casting so far. Then lift the liquid on the gas pressure, the lift back to the liquid metal crucibleliquid pipe not solidification, open type and took out the casting.

Low pressure casting process of basic characteristics: the filling velocity and pressure can be adjusted. Mold for low pressure casting, metal type and non metal type two. Metal type used for nonferrous metal casting large number of production, non metal mould used for single and smallbatch production, such as sand, graphite, ceramic andmelting model shell can be used for low pressure casting,and production in the sand or to use more. But the low pressure casting with permeability and strength of sandother materials should be than gravity pouring high, gas in the cavity, discharge depends entirely on the exhaust passage and the sand pore.

Cast away from the gate position of first solidification, let the gate finally solidified, the casting during solidification process is obtained through the gate feeding, realize sequential solidification.

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