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DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 楊申語(Sen-Yeu Yang) | |
dc.contributor.author | Yi-Heng Chen | en |
dc.contributor.author | 陳奕衡 | zh_TW |
dc.date.accessioned | 2021-06-08T03:54:32Z | - |
dc.date.copyright | 2018-08-18 | |
dc.date.issued | 2018 | |
dc.date.submitted | 2018-08-15 | |
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/21948 | - |
dc.description.abstract | 熱壓印成型為複製高分子微結構元件常用的製程技術,其具有製程步驟簡單、轉寫率高、模具機台成本較低的優勢。傳統熱壓印成型有二大問題:一是板壓,容易造成壓力分佈不均;二是升降溫耗時,成型週期過長。本研究利用滾輪施壓的方式,可突破腔體的面積限制,僅需調整滾輪左右壓力並搭配平台移動即可達到大面積均壓,相對於板壓需要調整平面二方向,可大幅減少其調整的時間。為了達到快速升降溫的目的,本研究藉由感應加熱一不鏽鋼帶,並傳熱至模具使基材軟化,因鋼帶厚度僅不到1 mm,能夠減低將整個模具感應加熱所需的能量與時間。
感應加熱的關鍵元件是線圈,為了解線圈對鋼帶的加熱狀況,先利用模擬軟體預測薄鋼帶在單面式線圈加熱下的升溫趨勢,並配合實驗進行驗證。分析結果顯示框型的線圈與本研究所需的溫度分布最為一致,其溫度分布趨勢也與實驗結果相當符合。經實際升溫顯示,於壓印點的溫差可控制在10°C以內,證明此機台設計可達到良好的溫度均勻性。本研究接著將帶輪式感應加熱與滾對版熱壓製程結合,設計製作可快速升降溫且具備滾輪施壓之設備,實驗結果顯示設備所需時間大幅縮短,於2分鐘內即可完成 在實際應用上,此製程能完整複製100 mm × 100 mm微米結構於PETG、PMMA基材表面,所複製的V型溝槽及為透鏡陣列皆可達到95%以上的轉寫率,並透過照度量測,驗證所製作的V型溝槽能夠有52%的增亮效果。本研究證明高週波感應加熱結合滾輪施壓應用於壓印微結構的可行性與性能。 | zh_TW |
dc.description.abstract | Hot embossing is a popular technology for fabrication of polymer micro-structured components. It has the advantages of simple steps, high replication rate, and low cost. Traditional hot embossing has two major problems: First, it easily causes uneven pressure distribution; second, the cycle time is too long. In this study, roller is employed to apply uniform pressure along the contact line. By simply adjusting pneumatic pressure applying in the two sides of shaft of the roller and by moving with the platform through the roller, large-area uniform embossing pressure can be achieved. In order to achieve rapid heating, a stainless steel belt is heated by induction heater right before entering the roller, and to heat the mold upon contact.
First, a simulation software is used to predict the heating rate and distribution of temperature of the heated thin steel belt during the heating of the single-side coil. The analysis results show that the coil with frame shape is the most suitable for the induction heating of the belt, and its temperature distribution is also quite satisfactory. Second, experiments of induction heating of the belt are setup and carried out. The measured temperature difference at the embossing point can be controlled within 10 °C. This proves that the design can achieve good temperature uniformity. Then a facility, in which the induction heating integrated with the belt belly hot embossing, is designed and constructed. The experimental results show the cycle time required replication of microstructures can be reduced to less than 2 minutes. Two microstructures, V-cut and microlens array have been replicated onto the surface of PETG and PMMA substrates of 100 × 100 mm2. The transcription rate of 95% can be achieved. The illumination measurement has shown that the brightness of the plates with V-cut has increases 52%. This study demonstrates the feasibility, performance and potential of induction heated belt pulley roller embossing for replication of microstructures. | en |
dc.description.provenance | Made available in DSpace on 2021-06-08T03:54:32Z (GMT). No. of bitstreams: 1 ntu-107-R05522720-1.pdf: 8414109 bytes, checksum: e26d9834b13f11a060fbf5720bd6796c (MD5) Previous issue date: 2018 | en |
dc.description.tableofcontents | 口試委員會審定書 i
誌謝 ii 摘要 iii Abstract iv 目錄 vi 圖目錄 x 表目錄 xv 第 1 章 導論 1 1.1 前言 1 1.2 傳統微熱壓成型 3 1.3 滾輪壓印成型技術 6 1.4 加熱技術 8 1.5 感應加熱應用於壓印成型 10 1.6 研究動機與目的 11 1.7 論文內容與架構 12 第 2 章 文獻回顧 13 2.1 滾輪壓印成型技術 13 2.1.1 滾壓成型技術 13 2.1.2 帶輪式滾壓成型技術 14 2.2 壓印成型快速加熱技術 17 2.2.1 紅外線加熱壓印成型技術 17 2.2.2 超音波震動加熱壓印成型技術 19 2.2.3 高週波感應加熱壓印成型技術 20 2.3 感應加熱基礎原理 27 2.3.1 電磁感應 27 2.3.2 感應加熱的能量轉換 29 2.3.3 焦耳效應(Joule Effect) 31 2.3.4 集膚效應(Skin Effect) 32 2.3.5 鄰近效應(Proximity Effect) 35 2.3.6 邊界效應 36 第 3 章 實驗設置 39 3.1 研究架構 39 3.2 帶輪式感應加熱微熱壓流程 41 3.3 帶輪式感應加熱微熱壓機構設計與設備 43 3.3.1 高週波產生器系統 44 3.3.2 移動平台 46 3.3.3 張力調節裝置 47 3.3.4 高週波感應線圈 48 3.4 量測儀器 50 3.4.1 壓力量測設備 50 3.4.2 熱電偶溫度資料擷取器 50 3.4.3 光學顯微鏡 52 3.4.4 雷射共軛焦顯微鏡 52 3.4.5 表面輪廓儀 54 第 4 章 機台設置探討與線圈模擬分析 56 4.1 感應加熱線圈模擬分析 56 4.1.1 COMSOL模擬分析流程 56 4.1.2 線圈設計模擬 59 4.1.3 模擬結果 63 4.2 鋼帶升溫探討 68 4.2.1 溫度探討實驗設置 68 4.2.2 靜態鋼帶升溫趨勢量測 68 4.2.3 動態鋼帶升溫趨勢量測 71 4.2.4 機台輸出功率對升溫速率的影響 76 4.3 帶輪壓力均勻性探討 78 4.4 本章結論 83 第 5 章 感應加熱帶輪微熱壓探討與應用 84 5.1 機台輸出功率對模具溫度影響探討 85 5.2 不同高分子材料之壓印探討 87 5.2.1 V型溝槽壓印於PETG 89 5.2.2 V型溝槽壓印於PMMA 93 5.2.3 V型溝槽壓印於PETG與PMMA之比較 96 5.3 不同微結構之壓印探討 98 5.3.1 微透鏡陣列壓印於PMMA 98 5.3.2 V型溝槽與微透鏡陣列壓印於PMMA之比較 103 5.4 本章結論 104 第 6 章 結論與未來展望 105 6.1 結論 105 6.2 未來展望 106 參考文獻 107 附錄A V型溝槽壓印於PETG量測圖 110 附錄B V型溝槽壓印於PETG九點量測圖 112 附錄C V型溝槽壓印於PMMA量測圖 114 附錄D 微透鏡陣列壓印於PMMA量測圖 116 附錄E 微透鏡陣列壓印於PMMA九點量測圖 118 | |
dc.language.iso | zh-TW | |
dc.title | 感應加熱帶輪微熱壓製程及其在光學用微結構複製的應用 | zh_TW |
dc.title | Replication of Large-area Microstructures using Induction heated Belt Pulley Embossing | en |
dc.type | Thesis | |
dc.date.schoolyear | 106-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 張致遠(Chih-Yuan Chang),粘世智(Shih-Chih Nian),韓麗龍(Lee-Long Han) | |
dc.subject.keyword | 熱壓印成型,滾對板施壓,感應加熱,微結構複製, | zh_TW |
dc.subject.keyword | hot embossing,belt pulley,induction heating,microstructure replication, | en |
dc.relation.page | 119 | |
dc.identifier.doi | 10.6342/NTU201803647 | |
dc.rights.note | 未授權 | |
dc.date.accepted | 2018-08-16 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 機械工程學研究所 | zh_TW |
顯示於系所單位: | 機械工程學系 |
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