右图为我们厂一铸件油砂芯子的局部,用手工制芯。由于油砂的湿强度低、流动性高及入炉时颠簸等原因,虽有浮土作衬托,烘干后的芯子大都因上端凸起部分倾斜而报废。严重地影响了产品质量和生产进度。我们制芯时,在原有工艺的基础上,用10×10×160的木条插入凸起部分中心,使问题得到了 The picture on the right shows a part of our factory oil casting sand core, with handmade core. Due to low wet strength of oil sands, high fluidity and bump into the furnace and other reasons, although backed by floating earth, the core after drying due to the upper convex part of the tilt and scrapped. Seriously affected the product quality and production progress. When we make the core, on the basis of the original technology, insert the center of the convex part with a piece of 10 × 10 × 160 so that the problem is solved