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系統識別號 U0026-0908201314490000
論文名稱(中文) 微射出成型微結構之尺寸變形研究
論文名稱(英文) Accuracy of Micro Feature Dimensions in Micro Injection Molding
校院名稱 成功大學
系所名稱(中) 航空太空工程學系碩博士班
系所名稱(英) Department of Aeronautics & Astronautics
學年度 101
學期 2
出版年 102
研究生(中文) 林百會
研究生(英文) Pai-Hui Lin
學號 P46004184
學位類別 碩士
語文別 中文
論文頁數 74頁
口試委員 指導教授-楊文彬
口試委員-胡潛濱
口試委員-陳介力
中文關鍵字 射出成型  微流道  Moldflow  壓克力應力應變曲線 
英文關鍵字 Injection Molding  micro channel  molding condition  spacing distance  Moldflow 
學科別分類
中文摘要 射出成型為製造業重要的生產過程,技術成熟、成本低且生產快,隨著現行產品追求輕薄短小以及微米奈米級的應用,傳統的射出成型技術也須跟著調整。本研究主要探討影響具微流道之微射出成型元件寬度方向成形之因素,實驗部分分別設計兩副具有微流道之模仁,探討製程參數(模具溫度、保壓壓力)、機械應力以及改變微流道與微流道之間間距對微流道寬度方向尺寸變化之影響。除了實驗部分,本研究還將實驗結果與理論計算做比較,並估測其殘留應力值。且分別利用Moldflow模流分析軟體去計算殘留應力大小及使用壓克力應力應變曲線去反推殘留應力,再將之與理論計算之值做比對。研究結果發現,當微結構之間間距大於2000μm時,製程條件以及機械應力對微結構寬度方向尺寸變化之影響並無明顯趨勢;但當將微結構之間間距縮短至1000μm左右時,因微結構與微結構之間相互影響的關係,應變量有增大的趨勢,且可漸漸看出改變模具溫度對微流道成形之影響。
英文摘要 Micro injection molding is one of the most important processes for making polymer products with micro features. The important prerequisite of the process is the replication accuracy of the micro features in the plastic components, such as DNA/RNA testing fluidic biochips, which are currently in great demand. Most previous studies had investigated the influence of molding conditions on the filling of polymer products with micro features. However, the influence of molding conditions on replication accuracy (shrinkage) has not yet been systematically investigated. An aim of our experiments is to determine the effect of molding conditions (molding temperature, packing pressure, and mechanical force) and geometry (distance between each micro-channel) on replication accuracy of micro polymer parts in detail. The theoretical derivation and simulations conducted via Moldflow® are also used to calculate residual stress.
It was found that when the distance between each micro channel is above 2mm, the replication accuracy only changed slightly with the mold temperature and packing pressure. Furthermore, extending the cooling time did not show significant change in the replication accuracy. Therefore, it could be concluded that the mechanical force during the demolding process is not a crucial effect on the replication accuracy of micro features. Finally, by reducing the distance between each micro channel to around 1mm, the micro channels started to affect each other due to residual stress.
論文目次 目錄
中文摘要 i
Abstract ii
致謝 iii
目錄 iv
表目錄 vii
圖目錄 viii
付錄圖目錄 xi
第一章、緒論 1
1-1 前言 1
1-2 研究簡介 1
1-2-1 微射出成形技術[2] 1
1-2-2 造成射出成型精度誤差之因素 3
1-3 目的 4
1-4 文獻回顧 4
1-5 研究方法 6
第二章、理論簡介、模擬與射出成形介紹 7
2-1理論推導 7
2-2 Moldflow模擬 10
2-3射出成型原理[1] 15
第三章、實驗規劃設計與製程 18
3-1 前置作業(模具及模仁設計) 18
3-2 實驗部分(射出成型實驗儀器與材料) 21
3-3 後處理部分(量測方式簡介) 28
3-3-1 模仁量測之共軛焦3D光學表面形貌量測儀 29
3-3-2 塑膠成品量測之表面粗度儀 30
第四章、結果與討論 32
4-1 成品取樣標準、初始參數及量測位置定義 32
4-1-1成品取樣標準 32
4-1-2初始條件 33
4-1-3量測位置定義 34
4-2 模仁一微射出成型實驗結果與討論 36
4-2-1模具溫度不同對於微流道寬度尺寸變化之影響 36
4-2-2保壓壓力不同對於微流道寬度尺寸變化之影響 39
4-2-3頂出時機械應力對於微流道寬度尺寸變化之影響 42
4-2-4理論值、Moldflow模擬與實驗結果之比較 45
4-3模仁二微射出成型實驗結果與討論 55
4-3-1改變微結構之間寬度對微結構寬度尺寸變化之影響 56
4-3-2流道形狀變化 60
4-4翹曲 61
第五章、結論 65
參考文獻 67
附錄1模仁一的應變趨勢圖 69
參考文獻 文獻回顧
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