Investment Casting For Railway Part

 Not only by water glass investment, but also Investment Casting for Railway Part can be produced by silica sol investment casting. During water glass investment casting:  tolerance of Railway Investment Casting is CT7-CT8. Most of carbon steel castings use water glass casting process for its low cost. In silica sol investment casting: Investment Cast for Railway Part uses lost wax casting method, which can control Steel Investment Casting of Railway Part within tolerance CT5-6.  Precision Casting of Train part has better surface finish.  In wax pattern process,we mix stearic acid and paraffin wax. In wax pattern making, as you know, it is better than polyethylene, and the wax deformation is small. In dipping slurry process, most of the suppliers adopt water glass technics in domestic area,but we adopt compound technics or silica sol technics. As you know, carbon steel castings will be much smoother with compound technics (compound of water glass and silica sol technics), this method is so popular with our customers, and the quality is higher than water glass technics, the cost is lower than silica sol technics.  In shell making,we adopt automatic sand-covering production line, which was invented under the guidance of our general manager.The indoor temperature was controlled by air-conditions,keeping the temperature at  24℃±1℃.