针对微模具型腔填充困难问题,以细胞培养皿微型制件为对象,设计制造了具有抽真空排气和超声振动功能的微注塑模具.采用单因素短射成型实验方法,研究了高密度聚乙烯(HDPE)和聚丙烯(PP)材料,在不加和施加超声振动时,熔体温度与模具温度、注射压力及注射速度变化对微模具型腔填充率的影响规律.结果显示,不同工艺参数条件下,施加超声振动比不加超声振动时2种材料的微型腔填充率均明显提高;当改变熔体温度时,施加超声振动比不加超声使HDPE材料的微型腔填充率平均提高了10.14％,PP材料平均提高了6.28％.而工艺参数一定时,增大超声功率也使微型腔填充率增加;超声功率增加到300W时,HDPE材料的微型腔填充率提高了10.12％,PP材料提高了4.98％.这表明施加超声外场作用能够促进聚合物熔体流动,提高微模具型腔填充率.
参考文献
| [1] | Zhen Lu;K. F. Zhang .Morphology and mechanical properties of polypropylene micro-arrays by micro-injection molding[J].The International Journal of Advanced Manufacturing Technology,2009(5/6):490-496. |
| [2] | Huang-Ya Lin;Wen-Bin Young .Analysis of the filling capability to the microstructures in micro-injection molding[J].Applied mathematical modelling,2009(9):3746-3755. |
| [3] | S. Y. Yang;S. C. Nian;S. T. Huang;Y. J. Weng .A study on the micro-injection molding of multi-cavity ultra-thin parts[J].Polymers for advanced technologies,2011(6):891-902. |
| [4] | 于同敏,庄俭,王敏杰,李又民.微注塑成型中熔体充模流动的影响因素研究[J].塑性工程学报,2007(06):185-189. |
| [5] | 徐斌,王敏杰,于同敏,徐华.细胞皿微型塑件注射成型工艺[J].化工学报,2010(11):2999-3005. |
| [6] | Baichuan Sha;Stefan Dimov;Christian Griffiths;Michael S. Packianather .Micro-injection moulding: Factors affecting the achievable aspect ratios[J].The International Journal of Advanced Manufacturing Technology,2007(1/2):147-156. |
| [7] | H.L.Zhang;N.S.Ong;Y.C.Lam .Effects of Surface Roughness on Microinjection Molding[J].Polymer engineering and science,2007(12):2012-2019. |
| [8] | Walter Michaeli;Thomas Kamps;Christian Hopmann .Manufacturing of polymer micro parts by ultrasonic plasticization and direct injection[J].Microsystem technologies,2011(2):243-249. |
| [9] | Wei Tian;Kai Leung Yung;Yan Xu .Enhanced nanoflow behaviors of polymer melts using dispersed nanoparticles and ultrasonic vibration[J].Nanoscale,2011(10):4094-4100. |
| [10] | 于同敏,武永强,黄晓超.超声外场对微圆柱阵列结构制件填充质量的影响[J].化工学报,2014(12):5023-5029. |
| [11] | Jinyao Chen;Yingzi Chen;Huilin Li;Shih-Yaw Lai;Jinder Jow .Physical and chemical effects of ultrasound vibration on polymer melt in extrusion[J].Ultrasonics sonochemistry,2010(1):66-71. |
| [12] | Chen YZ;Li HL .Effect of ultrasound on the viscoelasticity and rheology of polystyrene extruded through a slit die[J].Journal of Applied Polymer Science,2006(4):2907-2911. |
| [13] | Chen GS.;Guo SY.;Li HL. .Ultrasonic improvement of the compatibility and rheological behavior of high-density polyethylene/polystyrene blends[J].Journal of Applied Polymer Science,2002(1):23-32. |
| [14] | Ibar JP. .Control of polymer properties by melt vibration technology: A review[J].Polymer engineering and science,1998(1):1-20. |
| [15] | Atsushi Sato;Hiroshi Ito;Kiyohito Koyama .Study of Application of Ultrasonic Wave to Injection Molding[J].Polymer engineering and science,2009(4):768-773. |
| [16] | Jie Kong;Yan Xu;Kai-Leung Yung .Enhanced Polymer Melts Flow though Nanoscale Channels under Vibration[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2009(2):624-629. |
| [17] | Lei Xie;Gerhard Ziegmann;Bingyan Jiang .Reinforcement of micro injection molded weld line strength with ultrasonic oscillation[J].Microsystem technologies,2010(3):399-404. |
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