Research and Solution of Tablet Fragmentation in the Feeding Process of the Hole Feeding Device
In this paper,the stress of tablets in the hole feeding device of aluminum plastic packaging machine(hereinafter referred to as the feeding device)was analyzed,and solutions to the problem of tablet fragmentation in the feeding process were proposed through calculation and experimentation.The fragmentation rate and cavitation rate of the tablets during the feeding process were taken as the evaluation indexes.Based on the single factor test,Minitab 15.0 software was used to optimize the setting parameters of falling height,vibration frequency and guide groove radian of the vibrating disk in the feeding device,and the fitting models were analyzed.The mechanical analysis results showed that the tablets were obviously stressed in the vibrating plate,guide groove and blanking track of the feeding device.In this study,the optimal conditions were as follows:selecting the tablets with an average hardness of 45 N as the models,the gas pressure of the vibrating plate was 0.16 MPa,the accumulation thickness of the tablets on the vibrating plate was 2.5 cm,the vibration frequency was 37.00 Hz,the falling height of the vibrating plate was 3.00 mm,and the radian of the guide groove of the vibrating plate was 95.00°.A continuous production was conducted under above conditions and at the speed of 200 plates per 1 min for 6 h,the fragmentation rate in the feeding process could be reduced to 0,and the cavitation rate was only 1.44％.In addition,increasing the hardness of the tablet can improve its own mechanical strength,thereby improving the problem of tablet fragmentation.
万方数据
维普
