大袋包装机真空吸袋装置吸附能力研究

目的研究大袋包装机吸袋装置对不同材料包装袋的吸袋能力,以提高真空吸附的上袋成功率和工作效率。方法分析真空吸附装置的吸附原理,针对吸附性能的主要影响因素建立真空吸附模型;引入泄漏系数,设计吸附能力试验,分别对内衬编织袋、覆膜编织袋和纸塑复合袋等3种包装袋进行试验,记录气压变化情况。结果采用泄漏系数可以有效表征真空吸附装置对不同包装袋材料的吸附能力,吸附不同编织袋时气压变化并不相同,试验确定内衬编织袋、覆膜编织袋和纸塑复合袋的泄漏系数分别为0.192,0.089,0.042;根据泄漏系数和工作效率,吸附这3种包装袋时真空源气压区间应分别设定为59~64,70~75,66~71 k Pa,真空吸附上袋成功率达99%以上。结论得到了不同包装袋材料的吸附能力系数和合理的真空吸附工艺参数,为合理确定气源的工作区间、满足真空吸袋装置的吸袋响应时间和上袋成功率要求提供了参考依据。

Adsorption Capacity of Vacuum-sucking Device of Packaging Machine for Heavy-duty Bags

In this paper, the bag-absorbing capacity of different kinds of packaging bags by bag-absorbing devices of big wrapping machine was explored, so as to increase the successful vacuum-sucking rate and the working efficiency. Through analysis of the absorbing principle of the vacuum absorbing device, the vacuum absorbing model was built according to main influencing factors of absorption performance. The coefficient of leakage was introduced and the absorbing test was made on three kinds of wrapping bags, namely, lined woven bags, film-covered woven bags as well as paper-plastic compound bags, and the change of air pressure was recorded. The experiment using the coefficient of leakage can efficiently characterize the absorption capacity and the result showed that the change of air pressure differed according to different woven bags absorbed. The leakage coefficients of 0.192, 0.089 and 0.042 were set. According to the leakage coefficients and working efficiency, the vacuum air pressure of the three kinds of wrapping bags when being absorbed should be set as 59~64 kPa, 70~75 kPa, 66~71 kPa and the successful vacuum-sucking rate was over 99%. The absorption capability parameters and reasonable vacuum-sucking parameters are obtained, which provides reference for reasonable determination of working range of air source and satisfaction of bag-adsorption response time of the vacuum device and the successful rate.