纠偏系统在双向拉伸塑料薄膜生产中的应用

Application of correction system in two-way stretch plastic film production

在双向拉伸塑料薄膜生产过程中,纠偏控制系统极大地降低了横拉脱夹、褶皱、破膜、波纹抖动等问题的概率,实现了薄膜的高速、高效生产.综合国内外纠偏控制系统的应用情况,分别从动力装置、工作原理和控制方式等三个方面展开了分析.结果表明电液压式动力装置兼有机电式动力装置高精度和气动液压式动力装置运行平稳的优点;相较于定单边纠偏模式和对比纠偏模式,定中心线纠偏模式具有更高的稳定性和工作效率;在实际应用中纠偏控制系统的控制方式应兼有自动和手动两种,自动控制方式运用于生产,而手动控制方式运用于静态测试.在双向拉伸塑料薄膜生产过程中,纠偏控制系统需针对不同的薄膜工艺、材质及生产速度选取最优应用方案.

The probabilities of transverse unclamping ,fold ,film breaking and corrugated jitter are de-creased significantly by the correction system in the two-way stretch plastic film production process , which improves film production with high speed and high efficiency .Synthesizing the foreign and inland application ,the correction system was analyzed from the aspects of power plant ,working principle and control method respectively .It shows that the electric hydraulic power plant has the high precision of electro-mechanical power plant and stable operation of pneumatic hydraulic power plant .The setting centerline mode is more stable and efficient than the setting one side mode and the contrast correction mode .The control mode of the correction system should be both automatic and manual in practical application ,using the automatic control method in production and the manual control mode in static testing .In the two-way stretch plastic film production process , the optimal correction system should meet the requirements of the different film technologies ,materials and pro-duction speeds .