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南昌航空大學本科畢業(yè)論文
南昌航空大學
畢業(yè)論文
風扇調速旋鈕塑料模結構分析及設計
專 業(yè) 名 稱 模具設計與制造
班 級 學 號
學 生 姓 名 曾 登
指 導 教 師 宛 強
2012 年04月20日
南昌航空大學
畢業(yè)論文任務書
I、畢業(yè)論文題目：
風扇調速旋鈕塑料模結構分析及設計
II、畢 業(yè)論文使用的原始資料及設計技術要求：
一、原始資料：
零件圖及PROE、UG等設計所涉及的軟件
二、技術要求：
1.論述塑料模的結構特點
2.制件的設計精度為4級，要求大批量生產
3.選用注射機
III、畢 業(yè)論文工作內容：
2012年1月8日前 完成選題
2012年1月 進行資料收集、加工、整理，提出設計方案
2012年2月 進行并完成畢業(yè)論文
2012年3月 撰寫畢業(yè)論文
2012年3月30日 畢業(yè)論文模擬答辯
2012年4月20日 畢業(yè)論文答辯，成績評定
江西工業(yè)貿易職業(yè)技術學院 院、系(函授站) 模具設計與制造 專業(yè) 自考本科 班 學生 曾 登
日期：自 2012 年 01 月 8 日至 2012 年 04 月 20 日
指導教師 宛 強
兼職教師或答疑教師(并指出所負責的部分)：
教研室主任
摘要
塑料工業(yè)是當今世界上增長最快的工業(yè)門類之一，而注塑模具是其中發(fā)展較快的種類，因此，研究注塑模具對了解塑料產品的生產過程和提高產品質量有很大意義。
本設計介紹了注射成型的基本原理，特別是單分型面注射模具的結構與工作原理，對注塑產品提出了基本的設計原則；詳細介紹了塑件工藝的分析過程和注射模具澆注系統(tǒng)的設計過程，并對材料要求做了說明。
通過本設計，可以對注塑模具有一個初步的認識，注意到設計中的某些細節(jié)問題，了解模具結構及工作原理；通過對Pro/E、UG的學習，可以建立較簡單零件的零件庫，從而有效的提高工作效率。
目 錄
1 塑件成型工藝性分析·································7
1.1塑件制品結構分析····························································7
1.2成型工藝的分析·······················································7
1.2.1尺寸精度確定·························································7
1.2.2 脫模斜度確定·································································8
1.3 ABS的性能分析·············································································8
1.4 ABS的注射成型過程工藝參數(shù)··························································8
1.4.1注射成型過程···········································································8
1.4.2 ABS的注射工藝參數(shù)··································································9
1.5 ABS成型塑件的主要缺陷及消除措施················································9
1.6 確定模具基本結構·········································································9
2 分型面結構設計·········································································10
2.1分型面的選擇原則·········································································10
2.1.1分型面的確定·········································································10
2.2確定型腔數(shù)量及排列方式·······························································10
2.2.1一般確定型腔數(shù)量的三種方法···················································10
2.2.2確定型腔的排布方式·······························································11
2.3注射機型號的確定·········································································11
2.3.1按風扇調速旋鈕的注射量計算···················································11
2.3.2選擇注射機············································································12
2.3.3注射機有關參數(shù)的校核····························································12
2.4澆注系統(tǒng)形式和澆口設計·······························································13
2.4.1主流道的設計·········································································13
2.4.2主流道尺寸的確定···································································14
2.4.3主流道襯套的形式···································································14
2.4.4主流道冷料穴的設計·······························································15
2.4.5分流道的截面形式···································································16
2.4.6澆口的選擇原則及位置····························································16
2.4.7排氣系統(tǒng)的設計······································································17
2.5確定頂出方式···············································································17
2.5.1頂出方式的確定······································································17
2.5.2脫模力的計算·········································································17
2.6確定冷卻系統(tǒng)···············································································19
2.7注射模選材···················································································19
2.8導向與定位結構的設計···································································20
2.9模具的工作過程············································································20
3 成型零部件的設計···································································· 20
3.1確定型腔、型芯的結構和固定方式····················································20
3.2成型零件的尺寸計算······································································20
3.2.1型腔的徑向與深度尺寸計算······················································21
3.2.2型芯的徑向與高度尺寸計算······················································21
3.2.3塑件的型芯及型腔的成型尺寸標注圖·········································22
4 模架的確定和校核···································································· 22
4.1各模板尺寸的確定·········································································22
4.2模架各尺寸的校核·········································································23
5 繪制模具圖················································································ 24
6、總結······························································································ 33
7、參考文獻······················································································ 33
1 塑件成型工藝性分析
1.1塑件制品結構分析
本設計記為風扇調速旋鈕，如圖1.1所示塑件的質量要求不允許有裂紋和變形缺陷的；塑件材料為ABS，生產為大批量，塑件公差按模具設計要求進行轉換。
該塑件的結構不算復雜，但是產品外表面帶有花紋，產品里面也有凹槽，因為此產品是作為風扇調速旋鈕使用，大批量生產。所要求的制造精度不高,所以要求模具的制造精度也不高，因要與手部接觸，所以保證塑件表面質量即可。
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