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很多人认为,在潮模造型中,较深的凹槽和凹缝处紧实度不高是因为表面摩擦和型砂流动性不好造成的。然而实践证明,对于同样的凹槽,在摩擦系数相同的条件下,如果位置安排得不一样,则紧实效果也不同。由此可以设想,型砂中所含空气在实砂过程中的渗透阻力会影响铸型各部分的强度及紧实度。为了进行实验,型砂的配比确定为:旧砂—98%,1K02号新砂—1.38%,膨润土—0.4～0.45%,煤粉—0.15%,含水量—2.3～4.6%。将各种含水量不同的
Many people believe that in the tide modeling, the deeper grooves and notches at the compaction is not high because of the surface friction and sand caused by poor fluidity. However, practice has proved that for the same groove, under the same friction coefficient conditions, if the position is not the same as the arrangement, the compaction effect is also different. It can be assumed that sand contained in the sand in the process of real sand penetration resistance will affect the strength of various parts of the mold and compaction. In order to carry out the experiment, the ratio of molding sand is determined as: old sand -98%, 1K02 new sand -1.38%, bentonite -0.4 ~ 0.45%, pulverized coal -0.15% and water content -2.3 ~ 4.6%. Will be a variety of different water content