吉林省三岔子林业局对28吨机车汽缸套和胀圈的铸造工艺进行了改革,采用带砂衬的离心浇注法代替了以往的不带砂衬的离心浇注法和底返浇口的砂模法。砂衬起热的缓冲作用,其厚度为40毫米,这样厚的砂衬可以有效地防止铸作产生白口。砂衬强度要高,这样才能适应高速旋转时铁水对它的压力。砂衬配方和性能。 Jilin Province Sanchazi Forestry Bureau of 28 tons locomotive cylinder liner and expansion ring casting process has been reformed, the use of centrifugal casting with sand lining instead of the previous non-gypsum centrifugal casting method and the end of the back gate of the sand mold law. Sand liner from the heat buffer, the thickness of 40 mm, so thick sand lining can effectively prevent the casting white. Sand lining strength to be high, so as to adapt to high-speed rotation of hot metal on its pressure. Sand lining formula and performance.