高分子熔膠於彈臂搭接處之射出成形與分子配向性分析

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研究生：	王晴遠 Ching-yuan Wang
論文名稱：	高分子熔膠於彈臂搭接處之射出成形與分子配向性分析 Molecular Orientation Analysis of Step Feature of the Function Key Arm by Injection Molding
指導教授：	陳炤彰 Chao-Chang Chen
口試委員:	趙修武 Shiu-Wu Chau 沈永康 none 張榮語 none 黃國政 none
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：	2010
畢業學年度：	98
語文別：	中文
論文頁數：	117
中文關鍵詞：	射出成形、分子配向性、模流分析、拉曼光譜
外文關鍵詞：	Molecular Orientation, Moldflow Analysis, Injection Molding
相關次數：	點閱：225 下載：9
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本研究為探討高分子材料射出成形時在按鍵彈臂與外框結構搭接處的分子配向行為，使用模具為林政佑學長開發的功能按鍵。高分子材料選定結晶性材料的PP與不定性材料ABS，探討此兩種材料在搭接處的分子配向行為。本研究並利用模流分析Moldex R9.1進行充填行為分析，並與射出成形之結果進行短射比對。分子配向使用拉曼光譜作為分子配向的分析工具，在不同的模溫分別對垂直與平行於射出方向的搭接處，做拉曼光譜的結果比較。PP在固化層的鋒值強度稍大於核心層，因此模溫對於核心層的鋒值強度影響低於固化層，從峰值的變化可以得到結晶性材料可由拉曼光譜中判斷分子的配向性。分析ABS的分子配向性，在轉角處的峰值強度差異不大，非晶性材料在固化層易形成大的分子配向，冷卻後來不及鬆弛即固定。一般分子配向研究較著重於平面的分析，本研究結果可應用於具有高低落差特徵的塑膠結構之射出成形特性比較，期望提供設計者對此特徵的設計參考，減少開發期程。

This research is to investigate the molecular orientation of two thermoplastic polymer materials (including PP and ABS) step feature for the function key arms by injection molding.The Moldex3d R9.1 is used to run the simulation to compare with the experimental result by injection molding. The Raman spectrometer is used to observe and to compare the intensity peak by different molding temperature and flow direction. Result shows that the intensity peak of skin layer of PP resin is higher than that of core layer. There is almost the same as the different from intensity peak of ABS resin around the edge corner. Research result can be used to justify the molecular orientation of the mechanical structure of step feature by injection molding reduce the lead time of such product feature development.

目     錄
中文摘要......................................................................I
Abstract.......................................................................II
致謝......................................................................... III
目錄......................................................................... IV
圖目錄......................................................................VII
表目錄.....................................................................XII
第一章導論...............................................................1
1.1  前言..................................................................1
1.2  研究目的與方法....................................................2
1.3  章節介紹............................................................6
第二章文獻回顧.........................................................7
2.1  高分子材料配向性與流變特性文獻回顧........................7
2.2塑膠射出成形的文獻回顧.......................................14
2.3文獻回顧總結.....................................................15
第三章射出成品高分子特性與實驗原理............................26
3.1  高分子性質的概念...............................................26
3.1.1 熱塑性塑膠...................................................26
3.1.2   熱固性塑膠... . ..............................................28
3.2  影響射出成型品材料性質因素.................................28
3.2.1  充填速率的影響..............................................29
3.2.2  保壓機制的影響..............................................29
3.2.3  冷卻機制的影響..............................................30
3.3  高分子構造與分子配向性的關係...............................30
3.4  拉曼光譜分析儀的原理與觀察.................................32
3.5  彈臂搭接處的殘留應力量測. ...................................34
第四章實驗設備與實驗設計..........................................42
4.1     實驗設備......................................................40
4.1.1全電式射出成形機.........................................40
4.1.2 實驗模具....................................................40
4.1.3    模溫機.......................................................41
4.1.4    烘料機.......................................................41
4.1.5    塑膠材料....................................................42
4.2  量測儀器...........................................................51
4.2.1成型試片的取樣製作.......................................51
4.2.2 拉曼光譜儀..................................................51
4.2.3 應力偏光儀.................................................52
4.3  實驗流程規劃.....................................................56
4.3.1 模流分析....................................................56
4.3.2 射出成形實驗...............................................58
4.3.3 量測比對分析...............................................59
第五章實驗結果與討論................................................66
5.1模流分析、短射實驗..............................................66
5.2成形視窗實驗.....................................................67
5.3拉曼光譜量測結果...............................................68
5.3.1  拉曼光譜PP的分析結果.....................................69
5.3.2  拉曼光譜ABS的分析結果...................................71
5.4  殘留應力之光彈量測.............................................72
第六章結論與建議.....................................................95
6.1結論................................................................95
6.2建議................................................................96
參考文獻.....................................................................98
附錄 AFANUC ROBOSHOT α15-ίA機台規格.....................103
附錄 B 大同-NAK80鋼料之機械性質...............................104
附錄 C 奇美 ABS PA-757物性表....................................106
附錄D  日本JPP MG3FTA物性表...................................107
附錄E  MOLDEX3D R9.1翹曲分析結果...........................108
作者簡介...................................................................117

                                

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