戚墅堰机车车辆工厂革新成功了塑料喷钢模,先后喷出各种类型的泥芯盒和13~#钩舌、阀体、大型侧架铸件等中碳钢塑料模型。制模过程是:先作出木模,利用木模制出石膏模,在石膏模内先喷0.1～0.2毫米厚的锌,然后再喷0.6～1毫米厚的钢,向里涂一层铁粉:树脂=150:100的表面料作底层,再贴平织方格玻璃布,至所需 Qishuyan rolling stock factory success of the plastic spray steel mold, has sprayed all types of mud box and 13 ~ # knuckles, body, large side frame castings and other medium-carbon steel plastic model. Molding process is: first make a wooden mold, the use of wood mold cast gypsum mold first spray 0.1 ~ 0.2 mm thick zinc, and then spray 0.6 ~ 1 mm thick steel, coated with a layer of iron powder : Resin = 150: 100 surface material for the bottom layer, and then paste woven glass grid, to the desired