跳到主要內容

臺灣博碩士論文加值系統

(18.97.14.86) 您好!臺灣時間:2025/02/12 11:49
字體大小: 字級放大   字級縮小   預設字形  
回查詢結果 :::

詳目顯示

: 
twitterline
研究生:徐偉珉
研究生(外文):Wei-Min Hsu
論文名稱:薄型鍵帽射出成型製品之殘留應力研究
論文名稱(外文):Study on Residual Stress of Thin-keycaps Injection Molding
指導教授:韓麗龍韓麗龍引用關係
指導教授(外文):Lee-Long Han
口試委員:韓麗龍張仁安林宗聖施議訓
口試日期:2018-07-01
學位類別:碩士
校院名稱:國立臺北科技大學
系所名稱:製造科技研究所
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2018
畢業學年度:106
語文別:中文
論文頁數:48
中文關鍵詞:光彈分析殘留應力牛角澆口薄型鍵帽
外文關鍵詞:photoelasticityresidual stressbanana gateThin-keycaps
相關次數:
  • 被引用被引用:1
  • 點閱點閱:433
  • 評分評分:
  • 下載下載:94
  • 收藏至我的研究室書目清單書目收藏:1
在射出成形製程,澆口設計對於熔膠的充填行為影響甚鉅,進而影響塑膠製品的品質。本研究以筆記型電腦之薄型鍵帽作為研究載具,探討在射出成型後的殘留應力。實驗方法包含兩種不同澆口設計:單一牛角澆口(single banana gate)與一分為二之雙牛角澆口(dual banana gate);產品設計是建構兩種不同的減膠方式,模具設計為一模四穴。利用SIGMASOF軟體作CAE模擬分析,並配合實際射出成型實驗,比較四種不同的實驗設計對於塑件品質之影響。CAE模流分析結果顯示,一分為二的牛角澆口將有助於降低熱殘留應力產生,及能夠有效的降低塑件脫模而產生的頂出殘留應力。再以實際開模進行射出成形品作驗證,透過光彈分析可以發現雙牛角澆口設計之樣品於澆口周圍有較小的殘留應力。最後將實際射出的樣品進行冷熱衝擊試驗,比較澆口附近的變形量,結果發現雙牛角澆口設計較其他設計有著最小的變形量。將此澆口設計導入生產線的模具,可大幅提升薄型鍵帽生產品質。
The gate design has a great impact on the filling behavior of melt in an injection molding. It further affect the quality of the plastic product. In this study, the thin keycap of the notebook computer was used as the research subject to investigate the residual stress after injection molding. Experimental method including two types of gate design: single banana gate and divided into two branches of dual banana gate. Product design including two types of grooving design, and the mold design was a four-cavity design. Using SIGMASOF software and actual injection molding, experiment, compare the effects of four different experimental designs on the quality of plastic parts. The results of CAE analysis show that the dual banana gate will help reduce the generation of thermal residual stress and effectively reduce the residual stress caused under ejection process. Then develop the actual mold to verify the injection molding, the photoelasticity stress analysis indicates that the sample with double banana gate has the lowest residual stress around the gate. Finally, using thermal shock test for the injection molding samples to compare the amount of deformation near the gate. Results show that the minimum deformation is double banana gate design. The gate design introduced into production line can greatly increase the quality of thin-keycaps.
目 錄

摘要 i
ABSTRACT ii
誌謝 iii
目錄 iv
表目錄 v
圖目錄 vi
第一章 緒論 1
1.1 前言 1
1.2 研究動機 1
第二章 文獻探討 2
2.1 文獻回顧 2
2.2 殘留應力的分類 3
2.3 殘留應力對塑膠品的影響 5
2.4 殘留應力的改善方法 6
2.5 殘留應力偏光檢測 8
2.6 潛伏式澆口設計 10
第三章 實驗方法 13
3.1 建立塑件模型 15
3.2 SIGMASOFT模擬分析 19
3.3 射出成型實驗 26
3.4 產品檢驗 29
第四章 結果與討論 33
4.1 四種不同設計差異比對 33
4.2 模流分析探討 35
4.3 殘留應力光彈圖探討 40
4.4 產品冷熱衝擊測試探討 41
第五章 結果與討論 46
5.1 結論 46
5.2 未來展望 46
參考文獻 47
參考文獻

1.S. C. Chen and Y. C. Chen, “Calculations of the Flow-induced Residual Stress Development in the Injection Moulded Plate”, Computers & Structures, Vol. 52, No5, 1994, pp. 1043-1050.
2.X. Chen and Y.C. Lam, D.Q. Li, “Analysis of thermal residual stress in plastic injection molding”, Journal of Materials Processing Technology, Volume 101, Issues 1–3, 14 April 2000, Pages 275–280.
3.H. WANG‘, K. K. MANEMI, and G. SALLOUM , “Numerical and Experimental Studies on the Ejection of Injection-Molded Plastic Products”, POLYMER ENGINEERING AND SCIENCE, MARCH 2000, Vol. 40, No. 3, 2000, pp.826-840.
4.Can Weng, W.B. Lee , S. To and Bing-yan Jiang, “Numerical simulation of residual stress and birefringence in the precision injection molding of plastic microlens arrays”, International Communications in Heat and Mass Transfer, Volume 36, Issue 3, March 2009, Pages 213–219.
5.葉人瑜, 徐瑞坤,崁入式射出成型製品殘留應力之研究與改善,碩士論文,國立交通大學機械工程學系碩士班,新竹,2010。
6.傅鈺均, 黃俊欽,結合射出壓縮製程與動態模溫於導光板應力殘留最小化之研究,碩士論文,國立高雄應用科技大學,高雄,2011。
7.Pengcheng Xie, Fengxia Guo, Zhiwei Jiao, Yumei Ding and Weimin Yang, “Effect of gate size on the melt filling behavior and residual stress of injection molded parts”, Materials & Design, Volume 53, January 2014, Pages 366–372.
8.C-MOLD, C-MOLD Design Guide A Resource for Plastics Engineers, Third Edition, C-MOLD, Ithaca, New York, USA, 1998.
9.蔡毓斌, 徐瑞坤,塑膠射出成型之結合線與殘留應力之改善研究,博士論文,國立交通大學機械工程學系博士班,新竹,2010。
10.HASSAN PLAS PACKAGING,
http://hassanplas.com/an-introduction-to-injection-compression-molding-icm/
11.王泯玟,「淺談超高速射出成型技術」,機械工業雜誌技術專刊,2000, Pages 106-113.
12.劉文斌,「透明塑膠光學產品的殘留應力定性分析」,台灣區模具工會模具技術與論文發表論文集,2004.
13.Bayer Corporation, Part and Mold Design, A Design Guide, 2000
14.J. R. Donaldson and R. B. Schnabel, "Computational experience with confidence regions and confidence intervals for nonlinear least squares," Technometrics, vol. 29, no. 1, 1987, pp. 67-82.
15.林冠宏、楊德良,「含自由液圓筒流之渦漩迸裂」,第七屆水利工程研討會論文集,基隆,1994,第B275-282頁。
16.R. C. Luo, S. Suresh and D. Grande, "Sensor for cleaning casting with robot and plasma-arc," Proceedings of the 3rd International Conference on Robot Vision and Sensory Control, Cambridge, Massachusetts, 1983, pp.102-104.
17.李尚銘,機械元件設計之電腦輔助程式之發展,碩士論文,國立臺北科技大學機電整合研究所,臺北,1998。
18.A. Pllard, Flow in Tee Junction, Ph.D. Thesis, University of London, London, U. K., 1978.
QRCODE
 
 
 
 
 
                                                                                                                                                                                                                                                                                                                                                                                                               
第一頁 上一頁 下一頁 最後一頁 top