Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/2566
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dc.contributor.advisor沈君洋zh_TW
dc.contributor.advisorJung-Yang Sanen_US
dc.contributor.author陳賦宜zh_TW
dc.contributor.authorChen, Fu-Yien_US
dc.date2004zh_TW
dc.date.accessioned2014-06-05T11:43:34Z-
dc.date.available2014-06-05T11:43:34Z-
dc.identifier.urihttp://hdl.handle.net/11455/2566-
dc.description.abstract此論文針對多瓶胚射出成型模具進行公模部分之改良,並以數值方法模擬PP(polypropylene)瓶胚從射出至脫模間冷卻的過程,以期了解瓶胚在整個成型週期中材料結晶度的變化,以及影響此變化的主要因素;研究中分別以三種不同的冷卻水溫(-15℃、5℃及25℃)、兩種不同的瓶胚厚度(2.0 mm及3.5 mm)及四種不同的熔膠溫度(190℃、200℃、210℃與220℃)來進行模擬。此研究觀察在不同的狀況下,從射出至冷卻完成的過程中,瓶胚的溫度及相對結晶度分佈之變化,並找出其間存在的關係,以及冷卻水溫(冷卻速率)與瓶胚溫度及相對結晶度之間的關係。zh_TW
dc.description.abstractAn improvement of a multi-cavity injection mold for manufacturing polypropylene(PP) preform is performed. The cooling process in the mold during injection moulding is analyzed by using a numerical method. It is intended to obtain the variation of crystallinity of the PP material and the factors affecting this variation. Three cooling water temperatures,-15℃,5℃and 25℃, are individually considered. Two different wall thickness, 2.0 mm and 3.5 mm, of the preform are analyzed respec- tively. Four different melt temperatures,190℃,200℃,210℃and 220℃, are included. Under different operating conditions, the temperature and relative crystallinity of the preform are found. The effects of cooling rate on the relative crystallinity of the PP preform are obtained.en_US
dc.description.tableofcontents中文摘要………………………………………………………………..……..Ⅰ 英文摘要………………………………………………………………......…..Ⅱ 致謝………………………………………………………………………..…..Ⅲ 目錄……………………………………………………………………….…...Ⅳ 圖目錄…………………………………………………………………...….…Ⅶ 表目錄……………………………………………………………………....…Ⅸ 符號說明…………………………………………………………………..…..Ⅹ 第一章 前言…………………………………………………………………...1 1.1 射出成之型簡介………………………………………………….…1 1.1.1 射出製程…………………………………….……………..…..2 1.1.2 保壓製程……………………………………………………….3 1.1.3 冷卻製程……………………………………………..………...3 1.2 塑料特性…………………………………………………………….4 1.3 文獻回顧…………………………………………………….……....5 1.4 研究目的………………………………………………………….....9 第二章 射出成型與模具之改良………………………...…….…………….10 2.1 射出成型之使用設備……….…………………………………......10 2.1.1 射出成型機………………………………………...................10 2.1.2 冷卻系統…………………………………………………...…11 2.1.3 吊模設備…………………………………………………...…11 2.1.4 料斗乾燥機及吸料機………..…………………….………....12 2.1.5 溫度控制系統……………………………………………..….12 2.1.6 射出流程…………………………………………………..….12 2.2 塑料……………………………………………………….......13 2.3 模具之缺失與改良…………………………………...…..………..13 2.3.1 公模基座墊塊…………………………………………...…....14 2.3.2 公模基座……………………………………………..……….14 2.3.3 公模滑動固定塊及公模滑動塊…………………………...…14 第三章 熱傳分析模式…………………………………….…………………16 3.1熱傳基本理論………………………………………………………16 3.2 數值分析………………………………………………...……..…..16 3.2.1 數值分析模型建立……………………………………..….....17 3.2.2 暫態分析…………………………………………………..….18 3.2.2.1 第一組格點……………………………………………...18 3.2.2.2 第二組格點……………………………...…………..…..20 3.2.3 結晶分析…………………………………………………..….21 3.3 條件參數……………………………………………………….......23 3.4 程式流程………………………………………………….……..…28 第四章 模擬分析結果……………………………………………….………32 4.1 瓶胚之溫度分佈………………………………………………..….32 4.2 結晶速率於冷卻過程中之變化………………………………..….33 4.3 結晶速率與塑料溫度之關係…………………………………..….33 4.4 相對結晶度與冷卻速率之關係……………………………….......34 4.5瓶胚管壁厚度與相對結晶度之關係……………………………….35 4.6射出過程完成時之瓶胚溫度分佈………………………………….35 4.7 冷卻水溫度對週期時間之影響………………………………..….36 4.8 融膠溫度對最終相對結晶度之影響……………………………...36 4.9 模型建構與模擬之討論………………………………………..….37 4.9.1 瓶胚成品之前端(第一段處)……………………………..….37 4.9.2 凸出處(第十五段處)………………………………………...37 4.9.3 尾端(第二十段處)………………………………………..….38 第五章 結論………………………………………………………………….39 參考文獻……………………………………………………………………...42zh_TW
dc.language.isoen_USzh_TW
dc.publisher機械工程學系zh_TW
dc.subjectInjection Mouldingen_US
dc.subject射出成型zh_TW
dc.subjectCooling Rateen_US
dc.subjectRelative Crystallinityen_US
dc.subjectPreformen_US
dc.subjectPoly- propyleneen_US
dc.subjectNumerical Methoden_US
dc.subject冷卻速率zh_TW
dc.subject相對結晶度zh_TW
dc.subject瓶胚zh_TW
dc.subjectPPzh_TW
dc.subject數值方法zh_TW
dc.titlePP瓶胚之射出成型冷卻速率對結晶度之影響zh_TW
dc.titleEffect of Cooling Rate on the Crystallinity of a PP Preform during Injection Mouldingen_US
dc.typeThesis and Dissertationzh_TW
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