过去我们铸钢车间铸型合箱后,为了防止钢水跑火,都要用水玻璃砂将箱缝严严实实地塞紧抹实。不仅劳动强度大,而且每吨铸型要用近300kg水玻璃砂。 1986年第6期苏联《铸造生产》杂志中推荐的苏联专利A.c,310074,由沥清、工业油和石棉三种成分组成的密封材料,挤压成一定直径和长度的密封条使用。该密封条具有以下优点:①塑性好 密 In the past we cast steel mold box, in order to prevent the molten steel running fire, we must use water glass sand will be severely sealed box to tighten. Not only labor-intensive, but also use nearly 300kg per ton of water glass sand. 1986, No. 6 USSR patent A.c, 310074, recommended in “Foundry Production” magazine of the Soviet Union. Sealing material composed of bitumen, industrial oil and asbestos, squeezed into a seal of a certain diameter and length. The seal has the following advantages: ① good plasticity