我厂在生产长向预应力槽形板过程中,常常遇到槽形板的宽度不同等问题。以往作法是将槽形板内模改用木模,但木模在混凝土振捣时容易变形和损坏,影响构件质量。后改用角钢,外面包贴1～2毫米钢板做骨架,虽然能达到理想的成型效果,但遇到宽度不同的槽形构件,须改变内模宽度,钢板因气割、电焊、热胀冷缩造成的变形不易校正,而重新制作内模既费工 In the process of producing long pre-stressed trough plates, our factory often encounters problems such as different widths of trough plates. In the past, the internal shape of the grooved plate was changed to a wooden mold, but the wooden mold was easily deformed and damaged when the concrete was vibrated, affecting the quality of the components. After the use of angle steel, outside the bread affixed to the 1 ~ 2 mm steel skeleton, although it can achieve the desired molding effect, but meet the width of the groove-shaped components, the width of the internal mold must be changed, the steel plate due to gas cutting, welding, thermal expansion and contraction The resulting deformation is not easy to correct, and it is not only laborious to re-create the internal model.