我们接受了一批红铜圆棍(直径32公厘,长短不限)和红铜板(宽 40公厘、厚 10公厘、长300公厘)的任务。原来老是浇不好:裸露的铜片放在坩埚里,熔化后起罐倒入砂型,砂型有两公尺多长,斜躺着,斜度为5℃~10℃。铜水倒下以后,隔了一会,浇口中还没完全凝固的铜水就向外涨出,像有 We accepted the task of a group of copper rods (diameter 32 mm, unlimited length) and copper plates (width 40 mm, thickness 10 mm, length 300 mm). The original is always poor pouring: exposed copper on the crucible, melted into the sand into the tank, the sand is two meters long, reclining, the slope of 5 ℃ ~ 10 ℃. After the fall of copper water, after a while, the gate has not fully solidified copper water rose out, like