论文部分内容阅读
在粉煤灰砖坯成型过程中,坯体的层裂会严重地影响制品的质量。以往,一般认为:以细颗粒的粉煤灰为基本组分的粉煤灰砖坯料,它的孔隙率大,成型过程中难以排出残余空气,由于被压缩空气的弹性膨胀,从而造成坯体的层裂。特别是目前广泛使用的高压杠杆压砖机、16孔圆盘压砖机、8孔圆盘压砖机,其压制时间都比较短,分别为1.66秒、0.6秒、1.7秒,要在压制过程的瞬间排除空气是比较困难
During the forming process of fly ash brick blanks, the spalling of the blanks will seriously affect the quality of the products. In the past, it was generally considered that a fly ash brick blank with fine particles of fly ash as a basic component had a large porosity, and it was difficult to discharge residual air during the molding process, resulting in elastic expansion of the compressed air, resulting in the formation of a blank. Cracked. In particular, high-pressure leverage presses, 16-hole disc presses, and 8-hole disc presses, which are widely used at present, have relatively short pressing times of 1.66 seconds, 0.6 seconds, and 1.7 seconds, respectively, during the pressing process. It is more difficult to exclude air in the moment