本文根据对型砂强度的理论分析,提出辗轮的辗压作用能提高粘土的凝聚力和附着力,增加砂粒和粘土的接触点并扩大接触面积,是提高型砂强度的最主要作用;认为刮板和转子主要起松散、搅拌作用;认为辗轮表面的扭转作用力只使砂粒产生微小的角位移,同时产生附加挤压作用,但都不是影响型砂强度的主要因素。 Based on the theoretical analysis of the strength of the sand, this paper puts forward that the pressure effect of the rubbing wheel can increase the cohesion and adhesion of the clay, increase the contact point between the sand and the clay, and expand the contact area. It is the most important role to increase the strength of the sand; The rotor mainly plays loose and agitation; it is considered that the torsion force of the surface of the reel wheel only causes a slight angular displacement of the sand, and at the same time, it generates additional squeezing effect, but these are not the main factors affecting the strength of the sand.