滤棒成型参数优化及分切前后的压降变化规律研究

目的]优化KDF-2滤棒成型机加工工艺参数,提高滤棒成型质量的稳定性。方法]以对滤棒加工质量有重要影响的工艺参数:辊速比、辊压力、喷嘴空气压力、增塑剂施加量为试验因子,采用4因素3水平正交试验,并对滤棒分切前后的压降变化进行了研究。结果]滤棒成型的最佳工艺参数组合为:增塑剂施加量9%、喷嘴空气压力0.40 MPa、辊速比1∶1.28、辊压力0.20、0.20、0.050 MPa,对滤棒质量影响最大的指标为增塑剂施加量。将滤棒分切至目标长度后,切前压降比切后4支短支总和平均低44 Pa,并且切后4支滤嘴压降差异较大,极差平均为80 Pa。结论]研究可为优化滤棒成型工艺参数、提高滤棒质量提供参考。

Parameter Opt imization in Filter Rod Making and the Chan ge Law of Pressure Drop after Cutting

Objective] To improve the quality stability of KDF-2 filter rod making, to optimize the process parameters of filter rod making. Method] Using orthogonal experiment, the 4 key parameters were adopted, including speed ratio between rolls, roller pressure, air pressure and plasticizer spreading amount.L9(34) orthogonal test adopted.Changes of pressure drop after cutting were also discussed.Result] The optimal technologies were 9% plasticizer spreading amount, 0.40 MPa air pressure of nozzle, 1∶1.28 speed ratio between rolls and (0.20, 0.20, 0.050 MPa) roller pressure.The most important factor was plasticizer spreading amount.When the filter rod was divided into four equal length sections, the total pressure drop of the filter rod was 44 Pa larger than before cutting on average, and the values of the divided filter rods pressure drop had a great difference and the mean range was 80 Pa. Conclusion] This research provides references for the optimization of fil-ter rod making parameters and the enhancement of filter rod quality stability.