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我厂生产的铸铁件大部分是煤矿防爆电机的端盖和轴承盖。材质要求HT25—47。加工后防爆面不得有任何铸造缺陷,并进行8公斤/厘米~2的水压试验。铸件重量在2～80公斤之间。型砂全部采用活化膨润土煤粉砂湖型潮芯铸造。75年以前模型是木模。小件用活匣子造型,大件是单模单箱造型,劳动强度大,生产效牢低。从75年开始试用空心组合式铝模型—箱多模造型法,取代单模单箱造型和活匣子造型。经过几年的生产实践证明:铸件质量稳定,减轻了笨重的体力劳动,并取得了一定的经济效益。
Most of the iron castings produced by our factory are end caps and bearing caps of mine explosion-proof motors. Material requirements HT25-47. After processing explosion-proof surface shall not have any casting defects, and carried out 8 kg / cm ~ 2 hydrostatic test. Casting weight between 2 to 80 kilograms. Sand all activated by bentonite pulverized coal sand tidal core casting. 75 years ago the model was a wood model. Small box with live box modeling, large single-mode single box modeling, labor-intensive, low production efficiency. From 75 years to begin trial Hollow modular aluminum model - box multi-mode modeling method, instead of single-mode single box modeling and live box shape. After several years of production practice has proved that: casting quality and stability, reducing heavy manual labor, and achieved some economic benefits.