聚合物熔体充模流动中的对换热行为研究
The Study of Convective Heat Transfer Behavior of Polymer Melt in Micro Injection Molding
摘要: 以不同注射速度对两种不同牌号的聚甲醛(POM)熔体，填充深度和表面粗糙度不同的微模具型腔时，对型腔壁面不同位置处的温度分布进行了测量，求得了POM熔体与型腔壁面间的对流换热系数。结果表明，对流换热系数随注射速度与型腔表面粗糙度的增加而增大，随型腔深度与熔体流动距离的增大而减小；同时型腔深度和表面粗糙度及熔体填充距离间的相互耦合作用，对熔体流动的对流换热系数也具有明显的影响。利用Fluent软件对POM (M90-44)熔体填充型腔时的对流换热系数进行了数值模拟，得到的结果也与实验结果较好地吻合。
Abstract: The cavity temperature distribution was measured under different injection speeds when the two different grades of POM melt fill micro mold cavity at different cavity depths; cavity surface roughness, and the heat transfer coefficient (HTC) between the melt and the micro cavity wall were calculated. The results indicate that the HTC increases with the increase of the injection speeds and the cavity surface roughness, and decreases with the increase of the cavity depth and the melt flow distance. The coupling effect between the cavity depth, surface roughness and the melt flow distance also has significant influence on HTC. The HTC is simulated by the fluent software when the POM (M90-44) melt fills the micro cavity; the results are highly consistent with the experimental results.
文章引用：张拯恺, 于同敏, 段春争, 邹德健. 聚合物熔体充模流动中的对换热行为研究[J]. 应用物理, 2018, 8(5): 204-215. https://doi.org/10.12677/APP.2018.85025

参考文献

[1] Ghajar, M. and Darabi, J. (2014) Evaporative Heat Transfer Analysis of a Microloop Heat Pipe with Rectangular Grooves. In-ternational Journal of Thermal Sciences, 79, 51-59. [Google Scholar] [CrossRef] 
[2] Khan, T.S., Khan, M.S., Chyu, M.C., et al. (2010) Experimental Investigation of Single Phase Convective Heat Transfer Coefficient in a Corrugated Plate Heat Exchanger for Multiple Plate Configurations. Applied Thermal Engineering, 30, 1058-1065. [Google Scholar] [CrossRef] 
[3] Farahani, S.D., Kowsary, F. and Jamali, J. (2014) Direct Es-timation of Local Convective Boiling Heat Transfer Coefficient in Mini-Channel by Using Conjugated Gradient Method with Adjoint Equation. International Communications in Heat and Mass Transfer, 55, 1-7. [Google Scholar] [CrossRef] 
[4] Liu, Y. and Gehde, M. (2015) Evaluation of Heat Transfer Coefficient between Polymer and Cavity Wall for Improving Cooling and Crystallinity Results in Injection Molding Simulation. Applied Thermal Engineering, 80, 238-246. [Google Scholar] [CrossRef] 
[5] Liu, Y. (2015) Heat Transfer Process between Polymer and Cavity Wall during Injection Molding. Chemnitz University of Technology, Chemnitz.
[6] Liu, Y. and Gehde, M. (2016) Ef-fects of Surface Roughness and Processing Parameters on Heat Transfer Coefficient between Polymer and Cavity Wall during Injection Molding. International Journal of Advanced Manufacturing Technology, 84, 1325-1333. [Google Scholar] [CrossRef] 
[7] 田兴旺, 徐士鸣, 王平, 等. 黏性耗散对幂律流体在多孔介质内对流换热的影响[J]. 大连理工大学学报, 2015(2): 119-126.
[8] 刘焕玲, 贾建援, 殷磊. 圆形微通的对流换热特性研究[J]. 电子科技大学学报, 2009, 38(3): 476-480.
[9] 李烨, 盈亮, 胡平, 等. 圆截面管对流换热系数的实验研究[J]. 热加工工艺, 2013, 42(19): 15-18.
[10] 侯亚丽. 微通道内流体流动和换热特性的试验研究[D]: [硕士学位论文]. 天津: 河北工业大学, 2007.
[11] 尹玉真. 幂律流体在多孔介质中流动与换热的数值研究[D]: [硕士学位论文]. 大连: 大连理工大学, 2014.
[12] 殷素峰, 阮育煌, 阮锋. 超薄注塑中熔体–型腔对流传热系数的研究[J]. 工程塑料应用, 2016, 44(3): 54-59.
[13] Nguyen-Chung, T., Jüttner, G., Löser, C., et al. (2010) Determination of the Heat Transfer Coefficient from Short: Hots Studies and Precise Simulation of Microinjection Molding. Polymer Engineering & Science, 50, 165-173. [Google Scholar] [CrossRef] 
[14] Ilkhchy, A.F., Jabbari, M. and Davami, P. (2012) Effect of Pressure on Heat Transfer Coefficient at the Metal/Mold Interface of A356 Aluminum Alloy. International Communications in Heat & Mass Transfer, 39, 705-712. [Google Scholar] [CrossRef] 
[15] 王锦燕. 聚合物流变参数拟合及主曲线的生成[D]: [硕士学位论文]. 郑州: 郑州大学, 2003.

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