本专利的填砂装置,主要用来填充粒状、无粘结剂的造型材料,并实现无尘填砂。它有一个型砂材料贮存器(见图2),贮存器底部与砂箱上部相配,并放置在砂箱上;另有一组钻有孔的底板1,孔隙2、3可以关闭,其中孔隙2与贮存器内腔相通,孔隙3与排气沟4 The patented sand filling device, mainly used to fill the granular, binder-free modeling materials, and achieve dust-free sand filling. It has a sand material reservoir (see Figure 2). The bottom of the reservoir fits the top of the flask and rests on the flask. Another set of perforated bottom plates 1, 2 and 3 can be closed, with pores 2 and The inner cavity of the reservoir is communicated with the pore 3 and the exhaust groove 4