射压式造型机
Ejection molding machine
它是利用压缩空气将型砂均匀地射入砂箱预紧实，然后再施加压力进行压实。常用的有垂直分型无箱射压造型机和水平分型脱箱射压造型机。垂直分型无箱射压造型机造型不用砂箱，型砂直接射入带有模板的造型室，所造砂型尺寸精度高，因砂箱两面都有型腔，生产率很高，但下芯比较困难，对型砂质量要求严。水平分型脱箱射压造型机利用砂箱进行造型，砂型造好后合型脱箱，下芯比较方便，生产率高。
It compresses the molding sand evenly into the sand box before compacting with compressed air, and then compresses it with pressure. There are usually vertical parting and no box ejection press and horizontal parting and ejection press molding machine. The molding machine of vertical type non box ejection molding machine does not use sand box. The molding sand is directly into the molding room with the template. The precision of the sand shape is high. Because the sand box has two sides of the box, the productivity is very high, but the lower core is more difficult and the quality of the molding sand is strict. The horizontal parting and dejection press molding machine uses sand box for molding. The sand mold is made well after the combined type stripping, the core is convenient and the productivity is high.