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南昌航空大學(xué)本科畢業(yè)論文
南昌航空大學(xué)
畢業(yè)論文
風(fēng)扇調(diào)速旋鈕塑料模結(jié)構(gòu)分析及設(shè)計(jì)
專 業(yè) 名 稱 模具設(shè)計(jì)與制造
班 級(jí) 學(xué) 號(hào)
學(xué) 生 姓 名 曾 登
指 導(dǎo) 教 師 宛 強(qiáng)
2012 年04月20日
南昌航空大學(xué)
畢業(yè)論文任務(wù)書
I、畢業(yè)論文題目：
風(fēng)扇調(diào)速旋鈕塑料模結(jié)構(gòu)分析及設(shè)計(jì)
II、畢 業(yè)論文使用的原始資料及設(shè)計(jì)技術(shù)要求：
一、原始資料：
零件圖及PROE、UG等設(shè)計(jì)所涉及的軟件
二、技術(shù)要求：
1.論述塑料模的結(jié)構(gòu)特點(diǎn)
2.制件的設(shè)計(jì)精度為4級(jí)，要求大批量生產(chǎn)
3.選用注射機(jī)
III、畢 業(yè)論文工作內(nèi)容：
2012年1月8日前 完成選題
2012年1月 進(jìn)行資料收集、加工、整理，提出設(shè)計(jì)方案
2012年2月 進(jìn)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?cè)u(píng)定
江西工業(yè)貿(mào)易職業(yè)技術(shù)學(xué)院 院、系(函授站) 模具設(shè)計(jì)與制造 專業(yè) 自考本科 班 學(xué)生 曾 登
日期：自 2012 年 01 月 8 日至 2012 年 04 月 20 日
指導(dǎo)教師 宛 強(qiáng)
兼職教師或答疑教師(并指出所負(fù)責(zé)的部分)：
教研室主任
摘要
塑料工業(yè)是當(dāng)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(duì)了解塑料產(chǎn)品的生產(chǎn)過程和提高產(chǎn)品質(zhì)量有很大意義。
本設(shè)計(jì)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(jié)構(gòu)與工作原理，對(duì)注塑產(chǎn)品提出了基本的設(shè)計(jì)原則；詳細(xì)介紹了塑件工藝的分析過程和注射模具澆注系統(tǒng)的設(shè)計(jì)過程，并對(duì)材料要求做了說明。
通過本設(shè)計(jì)，可以對(duì)注塑模具有一個(gè)初步的認(rèn)識(shí)，注意到設(shè)計(jì)中的某些細(xì)節(jié)問題，了解模具結(jié)構(gòu)及工作原理；通過對(duì)Pro/E、UG的學(xué)習(xí)，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(jié)構(gòu)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(jié)構(gòu)·········································································9
2 分型面結(jié)構(gòu)設(shè)計(jì)·········································································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(jī)型號(hào)的確定·········································································11
2.3.1按風(fēng)扇調(diào)速旋鈕的注射量計(jì)算···················································11
2.3.2選擇注射機(jī)············································································12
2.3.3注射機(jī)有關(guān)參數(shù)的校核····························································12
2.4澆注系統(tǒng)形式和澆口設(shè)計(jì)·······························································13
2.4.1主流道的設(shè)計(jì)·········································································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(shè)計(jì)·······························································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(shè)計(jì)······································································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(jì)算·········································································17
2.6確定冷卻系統(tǒng)···············································································19
2.7注射模選材···················································································19
2.8導(dǎo)向與定位結(jié)構(gòu)的設(shè)計(jì)···································································20
2.9模具的工作過程············································································20
3 成型零部件的設(shè)計(jì)···································································· 20
3.1確定型腔、型芯的結(jié)構(gòu)和固定方式····················································20
3.2成型零件的尺寸計(jì)算······································································20
3.2.1型腔的徑向與深度尺寸計(jì)算······················································21
3.2.2型芯的徑向與高度尺寸計(jì)算······················································21
3.2.3塑件的型芯及型腔的成型尺寸標(biāo)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(jié)······························································································ 33
7、參考文獻(xiàn)······················································································ 33
1 塑件成型工藝性分析
1.1塑件制品結(jié)構(gòu)分析
本設(shè)計(jì)記為風(fēng)扇調(diào)速旋鈕，如圖1.1所示塑件的質(zhì)量要求不允許有裂紋和變形缺陷的；塑件材料為ABS，生產(chǎn)為大批量，塑件公差按模具設(shè)計(jì)要求進(jìn)行轉(zhuǎn)換。
該塑件的結(jié)構(gòu)不算復(fù)雜，但是產(chǎn)品外表面帶有花紋，產(chǎn)品里面也有凹槽，因?yàn)榇水a(chǎn)品是作為風(fēng)扇調(diào)速旋鈕使用，大批量生產(chǎn)。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(zhì)量即可。
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