Sand making machine in the cavity of the design is also raising sand making machine performance is very important factor, a cavity of the streamlined structure requires us to particle size control can be just perfect. Not all the size control theory can be applied to such sand making machine working chamber design. In contrast to the excellent manufacturing process, we found that using U cavity of the rotating cylinder drying machine is most suitable for the needs of the production of. New high performance sand making production line need for grain shape control. We found that not long and the material which can stop time of crushing cavity can promote the effective system of sand sand making machine operation. But we need to compare the whole process at the most time consuming process determines the time. In general, in low yield, rate, we choose 2-3 cavity design, and in high yield condition, we choose even cavity cavity even 1 streamlined design. 
    We adopt incentive type computer control system for grain shape control. The benefits of this approach are very independent and automation. Grain shape does not meet the requirements, it is absolutely impossible to a crushing cavity. When some cavity body adjustment operation, due to the use of full automatic sensing laying, largely saves the manpower cost.