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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 楊申語 | zh_TW |
dc.contributor.advisor | Sen-Yeu Yang | en |
dc.contributor.author | 郭哲瑋 | zh_TW |
dc.contributor.author | Zhe-Wei Guo | en |
dc.date.accessioned | 2023-10-03T17:11:25Z | - |
dc.date.available | 2023-11-09 | - |
dc.date.copyright | 2023-10-03 | - |
dc.date.issued | 2023 | - |
dc.date.submitted | 2023-08-04 | - |
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/90688 | - |
dc.description.abstract | 射出成型技術具備高自動化及成型複雜形狀的優點,但不易成型具有表面微結構之薄件,且不均勻的冷卻使成品翹曲嚴重而影響成品精度。由於充填過程中,熔膠與冷模壁產生固化層而需加熱器輔助成型,但往往加熱器會導致成品冷卻階段中的溫度不均。本研究開發公母模仁之石墨烯複材 (Graphene composites, GCs) 加熱系統,並使用射出成型製作具有光學微結構之曲面導光板,並透過電供調整加熱器功率,使公母模兩側加熱器配合而產生模面溫差藉此來控制成品曲率。
本研究開發之模具目標為使加熱器能夠快速傳遞熱、模面溫度均勻性佳,而選擇高熱傳導模具材料,並使用模擬分析熔膠壓力對於模仁產生的變形而設計出適當的模仁厚度;石墨烯加熱器優化方面,則透過塗佈材料、塗佈方向、線棒大小、加熱器面積來優化升溫速率以及升溫溫度均勻性。 透過Moldex3D模流分析軟體,對於微結構曲面導光板進行成型模擬分析,透過成型視窗得到基礎參數範圍,再經由單因子分析實驗,探討不同參數對於曲面導光板成型之翹曲影響,並從中挑選四個影響較高之敏感因子,配合田口法實驗L9直交表來優化成型參數,使曲面導光板成型具較低之翹曲變形。 實際成型實驗中,V-cut結構在無GCs加熱器時,結構複製轉寫率僅44%,而使用GCs加熱器在功率260 W、30 sec時,能夠將模具表面由95℃提高至140℃使微結構轉寫率可達99%;接著透過加入母模側石墨烯加熱器來控制模溫差,當母模側加熱器功率為100 W、30 sec,其曲面導光板之曲率半徑最接近模穴曲率半徑,故本研究透過雙面石墨烯加熱器來控制成品曲率以及微結構成型。 | zh_TW |
dc.description.abstract | Injection molding technology offers the advantages of high automation and the ability to mold complex shapes. However, it faces challenges in molding components with surface microstructures and the uneven cooling process leading to severe warpage and reduced precision of the final products. This study focuses on developing a GCs heating system for core and cavity in injection molding, which fabricate curved light guide plates with microstructures. By adjusting the power supply for the heater on both sides of the male and female molds so that they work together to generate a temperature difference on the mold surface. This temperature difference is used to control the curvature of the final product.
The goal of this research is to enable rapid heat transfer and achieve good temperature uniformity on mold surfaces. To achieve this, high thermal conductivity mold materials are selected, and simulation analysis is used to design an appropriate core and cavity thickness that takes into account the deformation caused by injection pressure. In terms of optimizing the GCs film heater, coating materials, coating direction, wire rod size, and heater area are optimized to improve the heating rate and temperature uniformity during the heating process. For molding experiments, the replication rate of the V-cut structure was only 44% without using GCs heater. However, by utilizing GCs heater at a power of 260 W for 30 seconds, the surface temperature of the core increased from 95°C to 140°C, resulting in a microstructure replication rate of 99%. Subsequently, by integrating GCs heater in the cavity, the temperature difference of the mold surface was controlled. When the power of the GCs heaters in the cavity was set to 100 W for 30 seconds, the curvature radius of the curved light guide plate approaches that of the mold cavity. Therefore, in this study, double-sided GCs heaters were used to control the final curvature and microstructure formation of the product. | en |
dc.description.provenance | Submitted by admin ntu (admin@lib.ntu.edu.tw) on 2023-10-03T17:11:25Z No. of bitstreams: 0 | en |
dc.description.provenance | Made available in DSpace on 2023-10-03T17:11:25Z (GMT). No. of bitstreams: 0 | en |
dc.description.tableofcontents | 誌謝 ii
摘要 iii ABSTRACT iv 目錄 v 圖目錄 ix 表目錄 xvi 第一章 導論 1 1.1 前言 1 1.2 微結構曲面產品介紹與應用 2 1.3 微結構曲面產品成型技術 4 1.4 急冷急熱加熱技術 7 1.5 石墨烯簡介與物性 11 1.5.1 石墨烯性質與製備 12 1.5.2 石墨烯複合材料 16 1.5.3 石墨烯複合材料加熱原理 21 1.6 研究動機與目標 22 1.7 論文內容與架構 24 第二章 文獻回顧 25 2.1 微射出成型曲面微結構應用 25 2.2 微射出成型微結構複製影響因子 26 2.2.1 製程參數對微結構成型之影響性 26 2.2.2 模具鍍層對微結構成型之影響性 27 2.3 微射出成型產品之翹曲影響 28 2.3.1 成型參數對於翹曲之影響 28 2.3.2 模具加熱系統對於產品翹曲影響 30 2.4 可變模溫技術之射出成型應用 33 2.4.1 交替式變模溫技術 33 2.4.2 各類加熱變模溫技術 34 2.4.3 薄膜加熱變模溫技術 40 2.5 石墨烯相關之加熱技術與應用 43 2.5.1 不同石墨烯製程之加熱器應用 43 2.5.2 石墨烯複材加熱技術應用於平面至曲面產品製程發展 46 2.6 文獻綜合歸納 51 第三章、實驗設置與方法 52 3.1 成品與模具設計及加工製作 52 3.1.1 成品設計 52 3.1.2 模具設計 53 3.1.3 模仁設計 55 3.2 實驗設備與材料 58 3.2.1 射出成型設備 58 3.2.2 實驗材料 59 3.2.3 供電系統 60 3.3 石墨烯複合材料加熱器製作 60 3.3.1 PI基板與石墨烯複合材料 60 3.3.2 石墨烯複合材料加熱器製作流程 64 3.4 量測設備 65 3.4.1 熱電偶資料擷取器 65 3.4.2 紅外線熱顯像儀 65 3.4.3 光學顯微鏡 66 3.4.4 表面輪廓儀 66 3.4.5 3D雷射共軛焦顯微鏡 67 3.4.6 四點探針量測 67 3.4.7 曲率量測 68 3.5 實驗流程 68 第四章 模具設計及製程參數模擬優化 70 4.1 模穴系統優化 70 4.1.1 不同澆口設計 70 4.2 模具設計應力分析 71 4.3 模具材料熱傳模擬與實驗 72 4.4 曲面導光板田口法實驗優化模擬 75 4.4.1 成型視窗模擬分析 75 4.4.2 單因子模擬分析 76 4.4.3 水準因子表建立 78 4.4.4 田口法優化之模擬分析 78 4.5 模具溫度差對於翹曲之影響模擬 80 4.6 模擬分析與實驗結果結論 82 第五章 石墨烯複合材料加熱器優化 84 5.1 加熱器升溫性能優化 84 5.1.1 不同複材之加熱性能 84 5.1.2 塗佈方向與電流方向 86 5.1.3 不同線棒尺寸之加熱性能 88 5.1.4 不同面積加熱器之加熱性能 91 5.2 加熱器模具通水路之升溫性能表現 93 5.2.1 GCs之模具升溫效率 93 5.2.2 GCs溫度均勻性 95 5.2.3 GCs反覆升溫試驗 97 5.3 加熱器優化結果與討論 98 第六章 微結構成型與曲率量測 99 6.1 實際成型實驗 99 6.1.1 短射實驗 99 6.1.2 成型視窗實驗 100 6.1.3 實際成型實驗 102 6.2 V型微結構成型量測 104 6.2.1 V型溝槽微結構 104 6.2.2 光學性質檢測 108 6.3 變模溫之曲率半徑控制 109 6.3.1 模面溫差控制設置 109 6.3.2 成品曲率半徑檢測 109 第七章 總結與未來展望 111 7.1 研究成果總結 111 7.1.1 模擬分析總結 111 7.1.2 實際成型總結 112 7.2 未來展望 114 參考文獻 115 附錄 A 射出機規格 120 附錄 B 奇美PC-175塑料性質表 122 附錄 C 電源供應器之規格 123 附錄 D PI膠膜產品說明書 124 附錄 E 模具組合圖 125 附錄 F 公模仁工程圖 126 附錄 G 母模仁工程圖 127 附錄 H I-WH12石墨烯導電油墨規格 128 附錄 I I-KT22石墨烯導電油墨規格 130 附錄 J 紅外線熱顯像儀規格 132 附錄 K 3D雷射共焦顯微鏡 134 | - |
dc.language.iso | zh_TW | - |
dc.title | 雙面石墨烯複材加熱器應用於變模溫射出成型曲面導光板微 結構成型及曲率控制 | zh_TW |
dc.title | Injection Molding for Curved Light Plates Microstructure Formation and Curvature Control by Using Double-Sided Graphene Heaters | en |
dc.type | Thesis | - |
dc.date.schoolyear | 111-2 | - |
dc.description.degree | 碩士 | - |
dc.contributor.oralexamcommittee | 張致遠;沈永康;粘世智 | zh_TW |
dc.contributor.oralexamcommittee | Chih-Yuan Chang;Yung-Kang Shen;Shih-Chih Nian | en |
dc.subject.keyword | 石墨烯複材加熱器,曲率控制,曲面導光板,雙邊變模溫射出成型,微結構, | zh_TW |
dc.subject.keyword | double-sided graphene composites heater,curvature control,curved light guide plane,mold temperature control in injection molding,microstructure, | en |
dc.relation.page | 135 | - |
dc.identifier.doi | 10.6342/NTU202302507 | - |
dc.rights.note | 同意授權(限校園內公開) | - |
dc.date.accepted | 2023-08-08 | - |
dc.contributor.author-college | 工學院 | - |
dc.contributor.author-dept | 機械工程學系 | - |
顯示於系所單位: | 機械工程學系 |
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