为了配合挤压机成型预应力混凝土空心楼板,应有相应的切割板材的机械设备。目前,有的挤压机成型混凝土空心楼板的切割,一般是在板材成型后,立即人工用有齿锯扒开,或是用高压水冲开。采用这些方法,切割质量不易保证,板材端头凹凸不齐,并要浪费一定的混凝土和钢筋,操作时费工也多。这是影响挤压成型工艺普遍推广的一个重要因素。在毛主席关于“独立自主、自力更生”方针指引下,于1974年11月我们三个单位组成了三结合小组,开始设计、试制 In order to cooperate with the extruder forming prestressed concrete hollow floor, there should be a corresponding cutting plate machinery and equipment. At present, some of the extrusion molding concrete hollow floor cutting, usually in the sheet metal forming, immediately with a toothed saw manually paving, or open with high-pressure water. Using these methods, cutting quality is not easy to guarantee, uneven ends of plates, and to waste a certain amount of concrete and steel, the operation more labor. This is an important factor affecting the general promotion of extrusion molding process. Guided by Chairman Mao’s principle of “independence and self-reliance,” in November 1974, our three units formed a three-pronged group to start the design and trial production