采用正交实验法考察了不同注射成型工艺参数对聚碳酸酯(PC)残余应力的影响,结果表明:熔体温度对残余应力影响最大,冷却时间和模具温度次之,注射压力影响最小.熔体温度升高,分子链快速松弛,残余应力减小.同时试样浇口附近处的残余应力较大且分布集中,沿熔体流动方向,残余应力逐渐减小.对于不同成型工艺,残余应力的分布趋势基本相同.
参考文献
| [1] | X. Chen;Y. C. Lam;D. Q. Li .Analysis of thermal residual stress in plastic injection molding[J].Journal of Materials Processing Technology,2000(1/3):275-280. |
| [2] | MIN I;YOON K .An experimental study on the effects of injection molding types for the birefringence distribution in polycarbonate discs[J].Korea Australia Rheology Journal,2011,23(03):155-162. |
| [3] | ISAYEV A I .Orientation development in the injection molding of amorphous polymers[J].Polymer Engineering & Science,1983,23(05):271-284. |
| [4] | 王鑫,Yi-yan Peng,李海梅,申长雨.退火对注射成型PC制品力学性能的影响[J].化工学报,2010(06):1555-1559. |
| [5] | Shyu GD.;Isayev AI.;Li CT. .Residual thermal birefringence in freely quenched plates of amorphous polymers: Simulation and experiment[J].Journal of Polymer Science, Part B. Polymer Physics,2003(15):1850-1867. |
| [6] | Isayev, AI;Shyu, GD;Li, CT .Residual stresses and birefringence in injection molding of amorphous polymers: Simulation and comparison with experiment[J].Journal of Polymer Science. Part B, Polymer Physics,2006(3):622-639. |
| [7] | 陈宇宏,袁渊,李曦,詹茂盛.注射成型和注射压缩成型角窗的残余应力比较[J].航空材料学报,2010(03):48-54. |
| [8] | Angstadt DC;Coulter JP .Investigation of melt manipulation phenomena during injection molding via in situ Birefringence observation[J].Polymer engineering and science,2006(12):1691-1697. |
| [9] | Chen SC.;Chen YC. .EFFECT OF PROCESS CONDITIONS ON BIREFRINGENCE DEVELOPMENT IN INJECTION-MOLDED PARTS .1. NUMERICAL ANALYSIS[J].Journal of Applied Polymer Science,1995(13):1757-1769. |
| [10] | Shia-Chung Chen;Yung-Cheng Chen;Hsin-Shu Peng;Lei-Ti Huang .Simulation of Injection-Compression Molding Process, Part 3: Effect of Process Conditions on Part Birefringence[J].Advances in Polymer Technology,2002(3):177-187. |
| [11] | Wang TH;Young WB .Study on residual stresses of thin-walled injection molding[J].European Polymer Journal,2005(10):2511-2517. |
| [12] | LEE Y B;KWON T H;YOON K .Numerical prediction of re sidual stresses and birefringence in injection/compression molded center-gated disk.Part Ⅱ:effects of processing conditions[J].Polymer Engineering & Science,2002,42(11):2273-2292. |
| [13] | WIMBERGER-FRIEDL R;De BRUIN J G .Birefringence in polycarbonate:molecular orientation induced by cooling stresses.Ⅰ.Free quenching[J].JOURNAL OF POLYMER SCIENCE PART B:POLYMER PHYSICS,1993,31(08):1041-1049. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%