一、问题的提出在1630吨挤压机上用φ170mm挤压筒生产如图1至4所示型材时有一个共同的特点:断面积决定了一模挤压一根型材,挤压系数偏大,致使挤压力太大,挤压速度小,生产效率低.即使能挤压也常常闷车使设备作业条件恶化,实际上无法正常挤压生产.这样只好采用一模挤压两根型材,这样可以大大地减少挤压系数,降低挤压力,使生产 First, the issue put forward In the 1630 tons extruder with φ170mm extrusion tube production profiles shown in Figure 1 to 4, there is a common feature: the cross-sectional area determines the extrusion of a profile, the extrusion coefficient is too large, Resulting in extrusion pressure is too large, the extrusion speed is small, the production efficiency is low. Even if the extrusion can often squeeze the equipment to make the working conditions worse, in fact, can not normally squeeze the production. Can greatly reduce the extrusion coefficient and reduce the extrusion pressure, so that production