| Currently the foreign advanced cigarette equipment is widely used in China’s major cigarette manufacturers. After development, tobacco manufacturing technology has been greatly enhance in our country, but a number of key technologies also rely on introducing from abroad. Domestic research on cigarette equipment is limited to transform the device structure, and proposed innovation from the principle is not much. According to MAX70 installation equipment this paper aims to reduce the rate of cigarette production quality defects, and takes its shortcomings of the process principles as a breakthrough point, and researches new cigarette filter installation method.First of all, this paper researches on the cigarette filter installation principle of different existing cigarette filter machines, and analyzes the impact of structural performance characteristics of different shapes washboard on quality of rubbing, and elaborates the mechanism of cigarette filter rubbing access.Secondly, the statistics of appearance quality defect cigarettes is collected from two MAX70 filter installation machines within ten working days. We find that tipping paper bubble wrinkle, clip foam and wrong tooth is most quality defects, among them tipping paper bubble wrinkle rate accounted for over 60% of the defect cigarette. Equipment was improved after summarizing the important causes of defects. By then doing a team defect rate statistics, we find that the overall defect rate has declined, but the bubble wrinkle, clip foam and wrong tooth still large numbers.Then after investigating occurrence of bubbles wrinkle defect, we find that where filter bubble wrinkle appears presents regularly. Through the above researching the installation mechanism and summarizing the practice, the root cause of the bubble wrinkle defect is found. To solve the problem of bubble wrinkle defect, improving cigarette device is needed to start from the work principle.Afterward rubbing filter processes were analyzed. Firstly in cigarette motion analysis without considering its deformation, a conclusion which is consistent with the practice is resulted, that is, when washboard is worn seriously, bubble wrinkle defect rate will rise. Secondly in cigarette analysis considering its deformation, the normal force and lateral force are approached when cigarettes contact washboard causing deformation. If this method is applied to practice, the operator can easily and quickly debug the equipment to the best performance.Finally, in order to overcome the two major factors causing the bubble wrinkle defects, this paper explores the new way to rub the filter, and designs three kinds of cigarette filter machines which is different from the existing mechanism. After feasibility analysis, it put forward a positive on conveyor and needle direction rubbing mechanism. Then this mechanism was designed specifically. And rubbing channel size and washboard speed parameter is initially determined. |
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