从碾砂机里出来的砂子,在造型以前必须经过松散处理,我厂过去用人工进行松散,这样不但工作效率很低,并且质量不高,在松散后的型砂中,有很多小的砂团(即泥团子)。经过我们的研究和试验,将原有的一只往复式筛砂机改装了一下(如图)。主要是把曲轴的转速加快,每分钟为300转,松散砂子用的铅丝网,做成高低起伏的波浪形。孔眼也减小到五公厘。这样,由于筛子很快的往复运动,使砂子在铅丝网上,互相撞击,因此经实的砂团很 The sand coming out of the sand mill must be loosely handled before it is molded. In the past, the plant was loosened by hand. In this way, not only is the working efficiency low and the quality is not high, there are many small sand masses in loose sand (Ie mud dumpling). After our research and testing, the original one reciprocating sieve dressing machine a bit (Figure). The main is to speed up the crankshaft, per minute for 300 rpm, loose sand with lead wire mesh, made of undulating waves. Eyelets are also reduced to five millimeters. In this way, due to the quick reciprocating sieve, the sand in the lead wire mesh, impact each other, so the real sand is very