PVC–U管材挤出机头流道优化设计
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摘要
为提高管材挤出机头的加工性能,加强机头流道的塑化作用,以挤出机头中直通式管材挤出机头作为研究对象,建立其挤出加工过程的数学模型,利用ANSYS Fluent软件对管材挤出机头流道的流动过程进行模拟研究,用CFD-post对模拟结果进行分析,并根据模拟结果对管材挤出机头流道的结构进行优化设计。模拟结果表明:优化后的管材挤出机头流道增加了熔体的流动速度,减少了熔体在机头流道内的停留时间,提高了流动性能;并降低了压缩段末端的压力降,提高了成型段上的压力降,增强了熔体的塑化性能,使制品变得更加紧密。
In order to improve the processing performance of the pipe extruder head,strengthen the plasticization of the head?ow channel,take the straight pipe extruder head in the extruder head as the research object,and establish the mathematical model of the extrusion process. Using ANSYS Fluent software to simulate the ?ow process of pipe extruder head ?ow,CFD-post to analyze the simulation results,and according to the simulation results to optimize the structure of pipe extruder head ?ow. The simulation results show that the optimized pipe extruder head ?ow path increases the melt ?ow speed,reduces the melt's stay time in the head?ow path,and improves the ?ow performance.It also reduces the pressure drop at the end of the compression section,improves the pressure drop on the forming section,enhances the plasticization performance of the melt,and makes the product more compact.
In order to improve the processing performance of the pipe extruder head,strengthen the plasticization of the head?ow channel,take the straight pipe extruder head in the extruder head as the research object,and establish the mathematical model of the extrusion process. Using ANSYS Fluent software to simulate the ?ow process of pipe extruder head ?ow,CFD-post to analyze the simulation results,and according to the simulation results to optimize the structure of pipe extruder head ?ow. The simulation results show that the optimized pipe extruder head ?ow path increases the melt ?ow speed,reduces the melt's stay time in the head?ow path,and improves the ?ow performance.It also reduces the pressure drop at the end of the compression section,improves the pressure drop on the forming section,enhances the plasticization performance of the melt,and makes the product more compact.
引文
[1]陈开源,周南桥,刘斌,等.螺旋芯棒式管材机头内熔体流动的数值模拟[J].塑料科技,2010,38(7):77-81.Chen Kaiyuan,Zhou Nanqiao,Liu Bin,et al.Numerical simulation of melt flow in spiral mandrel die for pipe[J].Plastic Technology,2010,38(7):77-81.
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[15]张礼华,贾辉,邱建成.微层挤出机头的流道建模与仿真研究[J].塑料工业,2018,46(1):37-39.Zhang Lihua,Jia Hui,Qiu Jiancheng.The finite element simulation and optimization of the runner for micro-layer extrusion blow molding head[J].China Plastics Industry,2018,46(1):37-39.
[16]周秀民,李晓林,吴大鸣.在挤出机口模中聚合物不稳定流动的模拟[J].塑料,2005(1):83-85+64.Zhou Xiumin,Li Xiaolin,Wu Daming.Simulation of the unstable flow of polymers in the extruding die[J].Plastics,2005(1):83-85+64.
[17]傅志红,刘卫,易琪,等.微通道塑料薄膜挤出机头流道优化及整体设计[J].塑料,2017,46(2):106-109.Fu Zhihong,Liu Wei,Yi Qi,et al.Optimization of flow channel and integral design for the extrusion die of microcapillary film[J].Plastics,2017,46(2):106-109.
[18]林峰,张正红.UPVC管材挤出成型机头模具的改进设计[J].轻工机械,2004(4):121-122.Lin Feng,Zhang Zhenghong.Improved design of mold for extruded pipe molding head of UPVC[J].Light Industrial Machinery,2004(4):121-122.
[2]赵峰,薛平,苗立荣,等.基于正交试验与数值模拟的木塑异型材挤出机头流道设计方法[J].中国塑料,2010,24(10):94-99.Zhao Feng,Xue Ping,Miao Lirong,et al.Design method for head flow of wood plastic extruder based on orthogonal test and numerical simulation[J].China Plastics,2010,24(10):94-99.
[3]马秀清,程琨,王远.三层复合共挤出板材机头流道的流场分析[J].塑料,2017,46(5):5-8+12.Ma Xiuqing,Cheng Kun,Wang Yuan.Flow field analysis of threelayer coextrusion sheet die[J].Plastics,2017,46(5):5-8+12.
[4]王远,马秀清.物性参数对三层共挤出机头流道流场的影响[J].塑料,2017,46(1):96-100.Wang Yuan,Ma Xiuqing.Influence of materials physical parameters on flow field in three-layer coextrusion die flow channel[J].Plastics,2017,46(1):96-100.
[5]齐斌.挤塑管材成型的计算机优化研究[J].塑料科技,2015,43(10):82-85.Qi Bin.Study on computer optimization of extrusion molding for plastic pipe[J].Plastics Science and Technology,2015,43(10):82-85.
[6]邹武,唐跃,郝永亮.芯棒式管材挤出机头的流动模拟分析[J].工程塑料应用,2007(6):33-37.Zou Wu,Tang Yue,Hao Yongliang.Flow simulation analysis of extruder head with core rod[J].Engineering Plastics Application,2007(6):33-37.
[7]许祥,李白千,靳明,等.基于Polyflow的一出二挤管机头模拟分析[J].中国塑料,2015,29(6):98-101.Xu Xiang,Li Baiqian,Jin Ming,et al.Simulation for pipe molding devices with two dies based on polyflow[J].China Plastics,2015,29(6):98-101.
[8]张文明,许乾慰,薛平.螺旋式管材机头内熔体流动的计算机模拟[J].塑料工业,2006(S1):184-189.Zhang Wenming,Xu Qianwei,Xue Ping.Computer simulation of melt flow in the head of spiral pipe machine[J].China Plastics Industry,2006(S1):184-189.
[9]刘斌,江开勇,上官宁.塑料挤出流动数值分析及其模具结构的设计优化[J].华侨大学学报:自然科学版,2008(4):481-489.Liu Bin,Jiang Kaiyong,Shang Guanning.Numerical analysis of plastic extrusion flow and optimization design of die structure[J].Journal of Huaqiao University:Natural science Edition,2008(4):481-489.
[10]林丽红,贾晓艳,马铁军.基于Fluent的橡胶挤出机流道设计[J].中国机械工程,2016,27(7):944-950.Lin Lihong,Jia Xiaoyan,Ma Tiejun.Design of extruder flow channel based on fluent[J].China Mechanical Engineering,2016,27(7):944-950.
[11]邹维东,郭奕崇,吴大鸣,等.小截面精密异型管材挤出模拟与实验研究[J].工程塑料应用,2006(3):54-57.Zou Weidong,Gou Yichong,Wu Daming,et al.Simulation and experimental study on extrusion of precision heterotype pipe with small section[J].Engineering Plastics Application,2006(3):54-57.
[12]杨涛.常用PVC-U管材生产设备[J].塑料科技,2007(5):80-85.Yang Tao.Commonly used PVC-U pipe production equipment[J].Plastics Science and Technology,2007(5):80-85.
[13]宗大全,朱弟雄.PVC-U管材模具设计与改进[J].工程塑料应用,2000(8):34-36.Zong Daquan,Zhu Dixiong.Design and improvement of PVC-Upipe die[J].Engineering Plastics Application,2000(8):34-36.
[14]刘斌,王玉龙,岳潼雁.直通式管材挤出模头智能化设计系统开发及应用[J].塑料,2013,42(2):10-13.Liu Bin,Wang Yulong,Yue Tongyan.Development and application of intelligent design system of straight-through pipe extrusion die[J].Plastics,2013,42(2):10-13.
[15]张礼华,贾辉,邱建成.微层挤出机头的流道建模与仿真研究[J].塑料工业,2018,46(1):37-39.Zhang Lihua,Jia Hui,Qiu Jiancheng.The finite element simulation and optimization of the runner for micro-layer extrusion blow molding head[J].China Plastics Industry,2018,46(1):37-39.
[16]周秀民,李晓林,吴大鸣.在挤出机口模中聚合物不稳定流动的模拟[J].塑料,2005(1):83-85+64.Zhou Xiumin,Li Xiaolin,Wu Daming.Simulation of the unstable flow of polymers in the extruding die[J].Plastics,2005(1):83-85+64.
[17]傅志红,刘卫,易琪,等.微通道塑料薄膜挤出机头流道优化及整体设计[J].塑料,2017,46(2):106-109.Fu Zhihong,Liu Wei,Yi Qi,et al.Optimization of flow channel and integral design for the extrusion die of microcapillary film[J].Plastics,2017,46(2):106-109.
[18]林峰,张正红.UPVC管材挤出成型机头模具的改进设计[J].轻工机械,2004(4):121-122.Lin Feng,Zhang Zhenghong.Improved design of mold for extruded pipe molding head of UPVC[J].Light Industrial Machinery,2004(4):121-122.