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我单位是生产预制钢筋混凝土构件的专业厂,自1984年使用拉模机生产预应力混凝土空心板以来发现,在抽动拉模机管芯时,空心板的前端头压缩量如过大,会使前端头超厚,既影响构件的外观,又浪费材料,并超过规范要求的偏差值。可见,避免预应力空心板前端头超厚的关键是减少其前端头的压缩量。因此,我们进行了大量的实验,
Our company is a professional factory that produces prefabricated reinforced concrete components. Since 1984, we have used pull mold machines to produce prestressed concrete hollow slabs. It has been found that when the pull die core is pulled, the compression of the front end of the hollow slab is too large, which will make The front end head is extremely thick, which not only affects the appearance of the components, but also wastes the material and exceeds the deviation value required by the specification. It can be seen that the key to avoid super-thickness of the front end of the prestressed hollow plate is to reduce the amount of compression at the front end. So we did a lot of experiments,