我厂鑄了一大批直徑4吋和6吋、長2500公厘的水管,芯子塗料原来是用排笔塗,效率很低。經研究改进了如附圖的工具,使芯子塗料的效率提高了十几倍。使用时在木槽里面裝上塗料。將要塗料的芯子放在木槽內轉动兩三转,塗料就均勻的沾到芯子表面,比用手 I plant a large number of diameter 4-inch and 6-inch, 2500-mm long water pipes, core paint was originally used row brush, the efficiency is very low. After studying the improvement of the tools as shown in the attached drawings, the efficiency of the core paint was improved more than tenfold. When used in the wooden tank with paint. The core to be coated on the wooden trough rotation on the two or three turn, paint evenly on the surface of the core than the hand