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目前,水泥桁条普遍采用长线台座平放张拉工艺成型。成型时,用角钢作侧模,中间以木条相隔,每次成型数根。其优点是混凝土容易被振实,可以采用较低的水灰比。但是,此法成型占地面积大,支模和脱模不方便,对钢筋安放的位置要求准确,钢筋容易滑偏一边,桁条往往弯曲变形。针对上述问题,常州水泥制品厂用立式拉模法。他们利用生产多孔条板台座的张拉设备和抽芯卷扬机进行生产。立式拉模一次可成型16根桁条。成型时成侧立位置,中间用包薄
At present, the cement purlins are generally formed by long-term tensing benches. When forming, angles are used as side molds, and woods are separated in the middle to form several roots at a time. The advantage is that concrete can be easily tamped and a lower water-cement ratio can be used. However, this method has a large floor area, inconvenient mold support and demoulding, and requires accurate positioning of reinforcing steel bars. The steel bars tend to slip sideways, and the purlins tend to bend and deform. In response to the above problems, Changzhou Cement Products Factory uses a vertical pull die method. They use the tensioning equipment and core puller for the production of porous slat pedestals for production. The vertical die can form 16 purlins at a time. When molding into a lateral position, the middle with a thin package