采用钢拉模生产预应力砼空心楼板在我国有一定基础,是目前砼空心楼板生产中主要工艺之一。我省各砼预制厂在1977年开始试制了第一代钢拉模,比较笨重粗糙自重大,由于很多原因起步时不十分理想。当初省一建预制厂试制了一台,在试生产过程中有的钢拉模抽芯时把砼板拉 The use of steel die to produce prestressed concrete hollow floors has a certain foundation in China, and is currently one of the major processes in the production of hollow floor slabs. The first-generation steel pull molds have been trial-produced by various prefabricated factories in the province since 1977. They are relatively heavy, rough, and heavy, and are not ideal for many reasons. At the beginning, a prefabricated factory in the province had been trial-produced, and some steel pulling molds pulled the cores during the trial production process.