七十年代我国预应力构件行业中,大部分企业对预应力多孔板加工采用附着式外振动,用手工和翻板脱模,这种操作工艺和设备结构陈旧,存在着效力低,耗能高,劳动强度大,废次品率高等弊病,近年来,由于新技术的应用,工艺、模具的改进,用内振动代替外振动拉模。 In the prestressed component industry of China in the 1970s, most companies applied adhesive external vibration to the prestressed porous plate processing and demoulded them by hand and flaps. This operating technology and equipment structure is outdated and has low effectiveness and high energy consumption. , Labor intensity, waste defective rate of high-level defects, in recent years, due to the application of new technologies, processes, mold improvements, with internal vibration instead of external vibration mold.