做砂箱时,要留出气孔及固定箱带用的孔,大都需要放砂心。最近车间投入一批新在品,要做不少专用砂箱;如果用普通坭心盒来做,每人一天只能做150个左右,供应不上做砂箱的需要。经车间青年工人李福茂同志建议,改用下列方法做坭心,可提高工作效率,现简单介绍如下: Do sandbox, to leave holes and fixed box with the hole, most need to put sand heart. Recently put in a number of new products in the workshop, to do a lot of special-purpose sand box; if you do with common heart box, each day can only do about 150, not to do the sand box needs. The workshop by young workers Comrade Li Fumao suggested that the use of the following methods instead of heart, can improve work efficiency, is now briefly described as follows: