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用优选法选择造型机型砂配比北京铁路局天津机车车辆配件厂的无箱挤压造型机自动生产线,自1970年10月投产以来,由于对这种新型的造型用砂没有足够的认识,又缺乏经验,配合比选择不合适,不是强度不够,就是透气性差。造型机要求有4～5%含水量、40～50%透气率、17～19磅/吋~2强度。很长时间没有搞出一个最佳配比,最近他们学习应用优选法,选择出型砂最佳配比。简介如下:
Select the model with the preferred method of sand ratio Beijing Railway Bureau Tianjin Locomotive and Parts Auto Parts Boxless Extrusion Molding Machine automatic production line since its commissioning in October 1970, due to the new modeling sand is not enough understanding, and Lack of experience, with the choice of inappropriate, not strength is not enough, that is, poor ventilation. Molding machine requires 4 ~ 5% moisture content, 40 ~ 50% air permeability, 17 ~ 19 pounds / inch ~ 2 intensity. For a long time did not come up with a best ratio, recently they learn to apply optimization method, choose the best proportion of sand. Brief introduction is as follows: