研究生: |
葉敬賢 Ching-Hsien Yeh |
---|---|
論文名稱: |
複合式光學元件於振動式射出壓縮成形之殘留應力及光學品質研究 Research on Residual Stress and Optical Quality in Hybrid Optical Elements by Vibratile Injection Compression Molding Process |
指導教授: |
陳炤彰
Chao-Chang Chen |
口試委員: |
楊申語
Sen-Yeu Yang 沈永康 Yung-Kang Shen 陳建光 Jem-Kun Chen 翁永進 Yung-Jin Weng |
學位類別: |
碩士 Master |
系所名稱: |
工程學院 - 機械工程系 Department of Mechanical Engineering |
論文出版年: | 2011 |
畢業學年度: | 99 |
語文別: | 中文 |
論文頁數: | 280 |
中文關鍵詞: | 振動式射出壓縮成形 、殘留應力 、分子配向性 、複合式光學元件 、光學品質 |
外文關鍵詞: | Vibratile injection compression molding, residual stress, molecular orientation, hybrid optical lens, optical quality |
相關次數: | 點閱:393 下載:6 |
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本研究探討複合式光學元件於射出成形中,其殘留應力的生成模式與變化,以及射出成形過程中之分子配向性分佈,最後應用振動式射出壓縮成形探討非球面形狀誤差、微結構轉寫率以及殘留應力對光學品質之影響。在研究方法上設計一模內熱退火實驗探討充填過程中澆口至充填末端之殘留應力之生成模式與變化,應用拉曼光譜儀探討成品於不同製程參數以及厚度下之峰值強度變化,並藉此定義一拉曼峰值強度比探討分子配向性分佈情形,最後藉由實驗設計探討射速、模溫與振動頻率對非球面形狀誤差、微結構轉寫率以及殘留應力之影響。實驗方法上將應用模流分析軟體根據實驗結果分析比對探討與實驗結果之趨勢。實驗結果上,根據模內熱退火實驗觀察到殘留應力隨持溫時間增加而逐漸減少,根據拉曼峰值強度比定義得知高射速下其成品表層有較高的配向性,並經模內熱退火實驗後其配向性明顯降低,由實驗設計結果得知非球面形狀誤差、微結構轉寫率以及殘留應力皆受模溫影響程度較大,最後並藉由誤差計算針對各成形誤差結果推測非球面形狀誤差對光學品質之影響最大。
This research is to explore the formation model of the residual stress, molecular orientation during injection molding of hybrid optical lens and finally to study aspheric form error, groove filling rate(GFR) and residual stress on optical quality. The research methods discuss the forming of residual stress from gate to filling end by in-mold annealing. Further, the Raman intensity ratio is defined to discuss the molecular orientation on different injection velocity and thickness. It also discusses the factors of injection velocity, mold temperature and PZT vibration frequency to the effects of aspheric form error, GFR and residual stress by experiment design finally. Experimental results will be compared with those of simulation analysis. From experimental results, the residual stress reduces gradually once the time of holding temperature is getting longer by in-mold annealing. The molded parts near the mold wall can have higher molecular orientation with higher injection velocity.The molecular orientation reduces in this in-mold annealing experiment. The aspheric form error, GFR and residual stress are mainly affected by mold temperature. Finally, the optical quality is mostly affected by aspheric form error.
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