摘要
可视化技术是当今人们用于揭示尚未涉及或未能深人探索的工程技术复杂问题的有效手段。其作用在整个自然科学研究领域内正在日益受到更多的重视,而在聚合物加工原理研究中也显现出广阔的应用前景。
双螺杆挤出机自1935年问世以来,经过半个多世纪的不断改进和完善,得到了长足的发展,如今在聚合物加工业和其它工业(如食品工业)中得到较广泛的应用。同向双螺杆挤出机作为一种高效的连续混合机越来越受到人们更多的重视,在聚合物材料的共混、填充和增强改性及塑料合金化方面已成为一种最为有效的装备。
在分析比较了当今国际上在双螺杆挤出可视化技术应用方面状况的基础上,本文针对双螺杆挤出理论研究尚存在的不足,提出了一个更加完善的双螺杆挤出可视化技术应用方案,并付诸了实施。
通过用多种通用塑料及工程塑料所作的同向旋转双螺杆挤出可视化的实验研究,建立了讫今人们尚未能深人揭示和探索的非充满固体输送及非充满熔融的理论模型,并综合运用数值计算方法进行了计算机模拟求解。对非充满的固体输送及熔融机理进行了较深入的探讨,最后作了实验和应用的验证。
论文工作主要获得如下成果:
1.成功地研制出了由计算机控制、并且有数据采集系统和摄录像系统的三方位可视的全程透明视窗双螺杆挤出机,该机具有较先进的机械性能和较完备的科学测试功能,可完全实现在工业生产条件下的双螺杆挤出全过程的可视化观察。从而结束了以往不能在工业生产条件下实施对聚合物材料在双螺杆挤出中全部变化过程的动态观察分析的历史。这一成果使我国在将可视化技术应用于聚合物双螺杆挤出理论研究方面跻身于世界的前列。
2.以可视化的实验观察表明:在同向双螺杆挤出中的固体输送及物料熔融过程与单螺杆挤出中的行为截然不同。本文指出了其最显著的区别在於物料在同向
The visual technique is an useful tool for revealing unsolved complicated problems of science and technology. Nowadays, and more attentions to visual technique are paid in natural science. And it has shown a wide use in study of polymer processing principles.
Since 1935, the invention of twin screw extruder has got a great progress. The machines so far have been widely used in polymer industry and other industries such as food industry. As an efficient mixer, the co-rotating intermeshing twin-screw extruder has become the most important equipment to produce polymer blend and polymer reinforced materials.
Based on the state of using visual technique in twin screw extrusion in the world, a more perfect method is put forward,and it has been carried out in our research work. That is, a twin screw extruder, with visual successirve transparent glass windows in three sections, was designed and manufactured successfully. The special machine, having advanced mechanical properties and equiped excellent scientific testing facilities, can be used to observe the whole process of twin screw extrusion under the industrial operating conditions.
引文
[1]. R. REZNICEK, "Flow Visualization V", Hemisphere publishing Co.,1989.
[2]. L.P.B.M. Janssen, "Twin Screw Extrusion", ELSEVIER Scientific Dublishing Company, New york,1978.
[3]. Italy Patent 370578.
[4]. U.S.A. Patent 2536396.
[5]. Britain Patent 629209.
[6]. Canada Patent 517911.
[7]. G.Schkel. " Kunstoffe Extrudertechnik" , Hanser Verlag, Mumish ,1963
[8|. R.Ermenger ,Chem. Ing.Tech.,36,175,1964.
[9]. H.G.Zimmermann, U.S.A. Patent 3,170,566 (965
[10]. M.L.Booy, P.E.S.,18,978 ,1978.
[11]. W.ZilonKowski, " Doppeschneckenextruder" , KUNSTOFFE, 38, Heft, 1968.
[12]. F.Martell, SPE. Journal, Vol. 27, No.1,26, 1971.
[13]. O.Armstroff and H.D.Zetter, Kunstofftechnik, 12,240,1973.
[14]. D.B.Todd & D.K.Baumann, " Twin screw Reinfored Plastics Compounding" , P.E.S., Vol.12, No.4, 1978.
[15]. Z.Tadmor & E.Broyer, P.E.S., 14, 660,1974.
[16]. U.Burkhardt, H.Herrmann & S.Jakopin, "Plastics Compounding", (Nov/Dec) 73, 1978.
[17]. John M. Smith, Leon P. B.M.Tanssen, " The Operating Characterstics of Twin-Screw Extruder" , P.E.S., Vol.18, No.8, 1978.
[18] W. A. Mack & E. Eisen, "Science and Technolgy of Polymer Science and Technology of Polymer Processing", Edited by N. P. Suh and N. H. Sung MIT, Cambridge, 1979.
[19] C. D. Bensen & B.K.Hwang, P.E.S.,20,965,1980.
[20]. Jagdish C. Maheshri and Charlses B.Wyman, "Mixing in an Intermeshing Twin Scrw Extruder Chamber: Combined Cross and Down Channel Flow", P.E.S, Vol. 20, No.9, 1980.
[21]. M. L. Booy, P. E. S., 20, 1220, 1980.
[22]. M. L.Booy, "The Influence of Non-Newtonian Flow on Effective Viscosity and Channel Efficiency in Screw Pumps", P.E.S, Vol.21, No2,1981.
[23]. K. Eise, h. Herrmann and H. Werner, Adv. Polym. Technol., Vol.1, No.2, 1978.
[24]. Cyis J. Rauwendaal, "Analysis and Experimental Evaulation Twin Screw Extrusion", P.E.S., Vol.21, No.16,1981.
[25].朱复华,”螺杆设计及其理论基础”,轻工业出版社,1984.5.
[26].朱复华,“双螺杆挤出机及其理论基础(连载二),双螺杆挤出机挤出机理”,塑料科技,1982,1
[28].朱复华,“双螺杆挤出机及其理论基础(连载三),双螺杆挤出机计算基础”,塑料科技,1983.2.
[29].朱复华,“双螺杆挤出机机其理论基础(连载四),捏合盘机理”,塑料科技1983.2
[30].朱复华,“双螺杆挤出机及其理论基础(连载五),双螺杆挤出机设计”,塑料科技,1983.4
[31].朱复华,“双螺杆挤出机中捏合盘输送机理的研究”,北方塑料,1982.
[32]. K. Eise., J. Curry and J. F. Nangeroni, P.E.S., 23, 642,1983.
[33]. L. R. Schmidt, E.M.Lovgren and P.G.Meissner, U.S. Patent 4,443,592, 1984.
[34]. 郑柯、盛昌泗, “示踪元素检测聚合物在挤出机内停留时间谱”,塑料工业, 1985, 2.
[35]. S.V.Kao and G.R.Allison, " Residence Time Distribution in a Twin Screw Extruder" .P.E.S., Vol.26, No.9, 1986.
[36]. H.Potence and H.Lappe, "Analysis of the Residence Time Distribution in Conventional Plasticising Extruders" , Plastics and Rubber
Processing and Applications, Vol.6, No.2, 1986.
[37]. R.M.Secor, " A Mass Transfer Model for a Twin Screw Extruder" ,E.S.Vol.27, No.1, 1987.
[38]. Dilhan M.Kalyon and Harish N.Sangani, " An Experimental Study of Distributive Mixing of Fully Intermishing Co-rotating Twin Screw Extruders" , P.E.S., Vol.29, No.15, 1989.
[39]. J.L.White and W.Szydlowski, Adv.polym.Technol.,7,419,1987.
[40]. J.Tayeb, B.Vergner, and G. Delia valle, J. Food Sci., 53, 616 ,1988.
[41]. Witeld Szydlewski and James L.White, " An Improve Theory of Metering in an Intermeshing Corotating Twin-Screw Extruder" , Adv. Polym. Technol., Vol.7, No.2, 1987.
[42] J.L.White and W.Szydlowski, Adv. Polym. Technol., Vol.7, No.4, 1987.
[43]. W.Szydlowski, R.Brzoskowski and J.L.White, Int. Polym. Proc, 1, 207 ,1987.
[44]. J. A. Speur, H.Mavridis and J.VIachopoulos, Adv.Polym. Technol., Vol.7, No.6, 1987.
[45]. D. M.Kalyon, A. D.Gotsis, C.G.Gogos and C.Tsenoglou SPE ANTEC Tech Papers, 34, 64, 1988.
[46]. D.M.Kalyon, A.D.Gotsis, U.Y.Imazer, C.G.Gogos, H.Sangani, B.Aral and C.Tsenoglou, Adv.Polym.Technol., 8, 337,1988.
[47]. M.J.Crochet, Personal Communication, 1988.
[48]. W.Szydloeski and J.L.White, J.Non-Newt. Fluid Mech., 28, 29, 1988.
[49]. H.E.H.Meijer and P.H.M.Elemans, Polym. Eng. Sci., 28, 275, 1988.
[50].酒井忠基、鬼出辛雄、沟口光明,Vol.39.No.5,1988.
[51].三冈岸泰,Vol.39,No.5,1988.
[52].石桥准也,“应用”,Vol.39,No.5,1988.
[53].官泽正尽,Vol.39,No.7,1988.
[54].伊藤公正,Vol.39,No.7,1988.
[54].伊藤公正,Vol.39,No.7,1988.
[55].伊藤公正,Vol.39,No.7,1988.
[56].柳和生,“异向旋转双螺杆挤出机理的研究”,上海交通大学硕士学位论文,1988.
[57].陈岩、崔爱玲,“全啮合双螺杆齿形齿形曲线形成过程探讨”,中国塑料,Vol.2,No.3,1988.
[58].郑柯,“啮合双螺杆齿形曲线探讨”,塑料科技,Vol.3,No.1,1988.
[59]. M. L. Booy, "Geometry of Fully Wiped Twin-Screw Equipment", P.E.S., Vol.18, No.12, 1978.
[60].耿孝正、王克坚、桑瑞菊,“啮合形双螺杆挤出机的特性研究”,北京化工学院学报,Vol.15,No.4,1988.
[61].王克坚、耿孝正,“啮合形双螺杆挤出机熔体输送特性的理论与实验研究”,中国塑料,Vol.2,No.3,1988.
[62].桑瑞菊、耿孝正,“异向旋转啮合型双螺杆挤出机熔体输送机理研究”,中国塑料.Vol.3,No.1,1989.
[63]. Y. Wang and J. L. White, J. Non-Newt. Fluid Mech., 32, 19,1989.
[64]. Y. Wang, J. L. White and W. Szydlowski, Int. Polym. Proc., 4, 262, 1989.
[65]. R. Lai Fook, A.Senouci, A.C.Smith and D.P.Isherwood, P.E.S.,29, 433, 1989
[66]. A. D. Gotsis and D.M.Kalyon, SPE ANTEC Tech. Papers, 35, 44,1989
[67]. J. L. White, S.Montes and J. K. Kim, Kautschuk Gummi Kunststoffe, 43, 20, 1990
[68]. J.L.White, "Twin Screw Extrusion-Technogy and Principles" Oxford University Press, New York, 1991.
[69]. H. Potente, J.Ansahl and R.Wittemeier, "Throughput Characteristic of Tightly Intermeshing Co-ratating Twin-Screw Extruders", Intern. Polymer Processing, V. 1990, 3.
[70]. Z. H. Shi and L. A. Utracki, "Development of Polymer Blend Morphology During Compounding in a Twin-Screw Extruder Part Ⅱ: Theoretical Derivations", P.E.S. Vol.32, No.24, 1992.
[71].酒井忠基,“混炼作用及二轴溶融过程影响”,日本机械学会论文集,第446号B编,1992.
[72].柳和生,“双螺杆挤出机中非牛顿粘性流体场数值计算方法的分析与选择(一)”,中国塑料,Vol.5,No.3,1991.
[73].柳和生,“双螺杆挤出机中非牛顿粘性流体场数值计算方法的分析与选择(二)”,中国塑料,Vol.5,No.4,1991.
[74].王蓉、耿孝正,“同向旋转双螺杆挤出机捏合盘元件的熔体输送特性及混合机理的研究”,中国塑料,Vol.4,No.1,1990.
[75].朱春雁、耿孝正,“啮合同向旋转双螺杆挤出机中波状螺杆元件的熔体输送和混合机理研究”,中国塑料,1991.2.
[76]. Jewmenow, S. D and Kim, W.S., Plaste end Kautschuk 20 (1973) 356
[77]. Todd, D. B, P.E.S, 15,1975,437.
[78]. Janssen, L.B.M and Smith, J.M., Plastics and Rubber Processing, 1, 1976,90.
[79].郑柯、盛昌泗,“示踪元素检测聚合物在挤出机中的停留时间谱”,塑料工业,No.2,1985.
[80]. Cyris. J. Rauwendael, "Analysis and Experimental Evaulation of Twin Screw Extruder", P.E.S, Vol.21, No.16,1981.
[81]. Kurt Eise, John Curry and James F.Naugeroni,"Compounding Extruders for Improved Polyblend", P.E.S., Vol.4, No.2, 1985. [82]. G.Menges and W.Feisttlorn, Adv.Polym.Technol. Vol.4, No.2, 1985.
[83]. Ennoe. Agur, Adv.Polym.Technol., Vol.6, No.2, 1986.
[84]. S.V.Kao and G.R.Allison, "Residence Time Distribution in a twin Screw Extruder", P.E.S, Vol.26, No.9, 1986.
[85]. H.Potente and H.Lppe, Plastics and Rubber Processing and Applications, Vol.6, No.2, 1986.
[86]. R.M.Secor, "A Mass Transfer Model for a Twin Screw Extruder", P.E.S., Vol.27, No.1, 1987.
[87]. Dilhan M.Kalyon and Harish N.Sangani, "An Experimental Study of Distributive Mixing of Fully Intermeshing Co-rotating Twin Screw Extruders", P.E.S., Vol.29, No.15, 1989.
[88]. J.W.Ess and P.R.Hornsby, Plastics and Rubber Processing and Application, Vol.8, No.3, 1987.
[89]. P.R.Hornshy, Plastics and Rubber processing and Application, Vol.7, No.4, 1987.
[90]. Dilhan M.Kalyon and Harish N.Sangani, "An Experimental Study of Distributive Mixing of Fully Intermeshing Co-rotating Twin Screw Extruders", P.E.S., Vol.29, No.15, 1989.
[91]. A.P.PIichocki, S.K.Dey and K.EIIczunski, P.E.S.,Vol.26, No.14, 1989.
[92]. O.Armstroff and H.D.Zettler, Kunststofftechnik, 12,240,1973.
[93]. Tadamoto Sakai and Noriaki Hashimoto, ANTEC87, 146-148.
[94] 朱复华、房士增,"非塞流固体输送理论的研究",高分子材料科学与工程, No. 4, 1987.
[95]. Noriki HASHIMOTO and Jun Kakizaki, "Analysis of Behavior of Polymer in Twin Screw Extruder by Observing Through TransparentCylinder", 日本制钢所技报 No.48,1993.
[96]. Tinghia Liu, Yichong Guo and Fuhua Zhu, "A New Visualization for Twin-Screw Piasticating Extrusion", PPS-10, P39-40,4,1994, Akron, USA.
[97]. Martell, Fabrizio, G. Twin Screw Extruders, Van Nostrand Reinhold Company Inc., 1983.
[98]. M.J.Stevens, "Extruder Principles and Operation", Elsevier Applied Science Pulishers, 1985.
[99]. Myury H. Kim, Witold Szydlowski, James C. White, Adv.Polym.Technol.,Vol.9, No.1, 1989.
[100]. Chang Dae Han, "Multiphase Flow in Polymer Processing", Academic Press, New York, 1981.
[101]. Fuhua Zhu, "The Visualization Technology in Polymer Processing", PPS-Yokyo'93, 10, 1993, P55-59, Japan.
[102]. Tinghia Liu, Yichong Guo and Fuhua Zhu, "A New Visualization for Twin-Screw Plasticating Extrusion", PPS-10,4,1994,Akron, U.S.A.
[103].朱复华,“单螺杆塑化挤出理论的研究”,高分子材料科学与工程,P1-8,1986.3.
[104].[英] C.A.布雷拜等,“边界元法的工程应用”,陕西科学技术出版社,1985.
[105]. H. P Wang and H.S.Lee, "Computer Molding for Polymer Processing", C.L.Tucker Ⅲ, Ch. 7, Hanser Publishers, NewYork, 1989.
[106]. M.A.Jawson and G.T.Symn, "Integral Equation Methods in Potentional Theory and Elastostatics", Acadcmic Press, 1977.
[107]. S. F. Shen, Int. J. Numerical Methods in Fluids, 4,171-183, 1984.
[108]. C.W.Hirt and B.D.Nichols, J.Computational Physics, 39, 1981.
[109]. Roger T. Fener, "Finite Element Methods For Engineer" Salisbury Wilthire, Press Britain, 1975.
[110]. Tadamoto Sakai, Jun Kakiizaki, Noriki Hashimoto, "Visualization of Melting Behavior in Intermeshing Twin Screw Extruder", PPS-10, P65-66, 1994, Akron, U.S.A.
[111].国家自然科学基金项目,“双螺杆挤出可视化技术及挤出理论” (5937118)阶段成果评审书,1993年12月9日.
[112]. Tinghua Liu, Yichong Guo, Ziwei Chen, Fuhua Zhu, "Processing Technical Study on Twin-Screw Extrusion of UHMW-PE Gel", PCR'94, Sep.1994, Kyoto, Japan.
[113].刘廷华、朱复华,“双螺杆混合元件的特性及应用”,塑料,No.6,1994.
[114].朱复华、房士增,“非塞流固体输送理论的研究”,高分子材料科学与工程,P22-34,1987.4.
[115].朱复华著,“螺杆设计及其理论基础”,轻工业出版社,1984.5.
[116].[英].J.N.REDDY,“有限元法概论”,湖南科学技术出版社,1988.
[117].章本照,“流体力学中的有限元法”,机械工业出版社,1986.
[118] [美] s.s.劳尔,“工程中的有限元法”,科学出版社,1991.
[119] 王元淳,“边界元法基础”,上海交通大学出版社,1988
[120] I.K.克列因著,陈万佳译,“散粒体结构力学”,中国铁道出版社,1983.
[121] F.M.white,“粘性流体力学”,魏中磊等译,机械工业出版社,1982.
[122] S.V.Patankar,传热与流动的数值计算,科学出版社,1984.
[123] 金日光,“聚合物加工中的流变学”,化学工业出版社,1986.6.
[124] 南京大学,“偏微分方程的数值解法”,科学出版社,1983.
[125] 钱知勉,“塑料性能应用手册”,上海科学技术文献出版社,1986.
[126] 程光戌等,“程序的调试与考核”,高等教育出版社,1987.
[127] 郭炳钧、姜南,“国产十四种热塑性塑料与钢的摩擦系数测定”,北京化工大学院挤出工程原理科研鉴定会附件,1983.
[128] 房士增、朱复华、洪国宝,北京化工学院硕士论文,1984.
[129] Edmondson and Fenneer, Polym. Eng. Sci., 20, 562, 1980.
[130] C. A. Brebbia & S. walker, "Boundary Element Techniques in Engineering", Pentech Press, 1980.