广州柴油机厂铸造车间离心铸造生产的6300型柴油机缸套,自1969年底投产以来,质量稳定。但对缸套外模的预热,却一直采用将外模立排地面,烧木柴烘烤。每炉次平均预热21只外模,耗木柴1.5吨左右,才能使外模预热至可上涂料温度,烘烤时间达1小时。造成整个车间烟气弥漫,劳动环境很差,严重影响工人身体健康。在批林批孔运动的推动下,铸造车间革命职工,敢想敢干,结合本车间生产场地小、无法建造预热炉的实际情况,自制成功地坑式缸套外模加热炉(见图),经一年多生产试用,使用效果良好。 6300 Diesel Cylinder Liner, produced by centrifugal casting of foundry workshop in Guangzhou Diesel Engine Factory, has been in stable quality since its commissioning in late 1969. However, the preheating of the outer cylinder liner, it has been used outside the vertical molding of the ground, burning firewood baking. Preheat an average of 21 per furnace external mode, consumption of 1.5 tons of firewood in order to preheat the outer mold to the coating temperature, baking time of up to 1 hour. As a result, the smoke of the entire workshop was filled and the working environment was very poor, seriously affecting the workers’ health. With the promotion of Linchi Pore Movement, the revolutionary staff of the foundry workshop dared to think and dare to do it. Combining with the fact that the production site in this workshop was small and the actual condition of the preheating furnace could not be built, a successful homemade pit-cylinder external mold heating furnace ), After more than a year of production trial, the use of good results.