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在消失模铸造过程中,带有较高上凹空腔的模片容易造成震实死角,型砂充填不进和震实不够,浇注时涂层得不到型砂有效支撑而破损,铁液渗出,产生铁包砂,使铸件报废。为解决这个问题,使用随型覆膜砂片代替敷树脂砂工艺,解决震实死角铁包砂问题,成功生产装载机833变速箱体铸件。
In the process of lost foam casting, the die with the upper concave cavity is easy to cause shock and dead angle, the sand filling does not enter and the shock is not enough, the coating can not be effectively supported by the sand when the casting is damaged, and the liquid exudes , Resulting in iron sand, the casting scrapped. To solve this problem, the use of coated with sand instead of coated resin sand sand process to solve the problem of sand cast iron sand dead angle, the successful production of 833 gearbox casting loader.