【正文】 編號： 畢業(yè)設(shè)計(論文 )說明 書 題 目： 塑料電子表蓋的塑 料模具設(shè)計 學(xué) 院： 機(jī)電工程學(xué)院 專 業(yè)： 機(jī)械電子工程 學(xué)生姓名： 學(xué) 號： 指導(dǎo)教師單位： 機(jī)電工程學(xué)院 姓 名： 職 稱： 題目類型 ： ?理論研究 ?實(shí)驗(yàn)研究 ?工程設(shè)計 ?工程技術(shù)研究 ?軟件開發(fā) 2021 年 5 月 24 日 桂林電子科技大學(xué)畢業(yè)設(shè)計（論文）報告用紙 摘 要 塑料是一種新型工程材料 .發(fā)展速度迅速，塑料的加工和成型工藝也越來越得到重視，其中注射成型是最常用的塑料零件成型方法之一。塑料電子 表蓋 是人們?nèi)粘Ｉ钪谐Ｒ姷募彝ビ闷?，與人們生活密切相關(guān)，其外觀要求很高，而且整體體積小，形狀曲面要求過渡平穩(wěn)，對注射成型模具和工藝的要求極高。 本次設(shè)計主要 分析了塑料電子 表蓋 的塑件成型工藝的特點(diǎn)，詳細(xì)介紹了塑料電子 表蓋 的結(jié)構(gòu)設(shè)計和模具設(shè)計的過程以及要點(diǎn)。重點(diǎn)介紹了塑料電子 表蓋 的 塑件結(jié)構(gòu)的設(shè)計方法，分析和闡述了模具分型面的選擇、模具型腔數(shù)目的確定、注射機(jī)的選擇、模架的選擇方法、排氣系統(tǒng)、澆注系、溫度調(diào)節(jié)系統(tǒng)等的設(shè)計過程。 關(guān)鍵詞 ： 塑料 電子表蓋 ；塑料注射模；模具結(jié)構(gòu)；點(diǎn)澆口。 桂林電子科技大學(xué)畢業(yè)設(shè)計（論文）報告用紙 Abstract Plastic is a new kind of engineering material. With its rapid development， Plastic Processing and forming technique have been getting more and more important， and Plastic injection molding is one of the most applied methods for parts molding. The cock is one of the most mon domestic appliances and was closely related to people’s basic life. It features side opening, screw thread, and curve hole. It’s high requirement of fair outside aspect, small sizes, and smooth transition between two curve plaary need the injection mold and die which was used to form it of high accuracy and technique. The injection technological characteristics of Electronic watch cover were analyzed, and the design of structure ofElectronic watch cover and the main points of mould are also introduced specifically. The most advanced technology of mold design is adopted. The design method of plastic structure is mainly introduced. The selection of sidewall thickness, the decision of the mould cavity number, the selection of injection machine, and the designing process of the parting plane, the exhaust system and feed system were stated. The design structure characteristics of Electronic watch cover are two times parting planes with pin gate style, and side coredrawing structure. Key words: Electronic watch cover； plastic injection mould； mould structure；mould structure 。pin gate； side core。 桂林電子科技大學(xué)畢業(yè)設(shè)計（論文）報告用紙 目 錄 引言 .............................................................................................................. 1 1 模具設(shè)計概論 ......................................................................................... 1 我國模具工業(yè)特點(diǎn)與基本狀況 ....................................................................................... 1 塑料模具的發(fā)展趨勢 ....................................................................................................... 3 2 塑料電子表蓋工藝性分析 ...................................................................... 4 產(chǎn)品材料分析 ................................................................................................................... 4 注塑模工藝條件 ............................................................................................................... 4 塑件結(jié)構(gòu)和尺寸精度分析 ............................................................................................... 5 塑件的產(chǎn)品結(jié)構(gòu) ............................................................................................................ 5 產(chǎn)品幾何形狀分析 ........................................................................................................ 6 3. 模具結(jié)構(gòu)設(shè)計 ..................................................................................... 11 總體方案擬訂 ................................................................................................................. 11 型腔數(shù)目的確定 .......................................................................................................... 11 注射機(jī)型號的選定 ...................................................................................................... 12 型腔數(shù)量及注射機(jī)有關(guān)工藝 參數(shù)的校核 .................................................................. 13 分型面的設(shè)計 ................................................................................................................. 16 4 成型零件的設(shè)計及計算 ........................................................................ 17 成型零部件尺寸分析 ..................................................................................................... 17 塑件收縮率的影響 ...................................................................................................... 17 成型零件的設(shè)計 ............................................................................................................. 18 模架的確定 .................................................................................................................. 18 成型型腔壁厚的計算 .................................................................................................. 20 脫模機(jī)構(gòu) .......................................................................................................................... 21 脫模力的計算 .............................................................................................................. 21 推出零件尺寸的確定 .................................................................................................. 22 部分部件強(qiáng)度校核 ......................................................................................................... 22 動模板強(qiáng)度校核 .......................................................................................................... 22 定模板強(qiáng)度校核 .......................................................................................................... 23 支承板強(qiáng)度校核 .......................................................................................................... 24 5 澆注系統(tǒng)設(shè)計 ....................................................................................... 24 澆注系統(tǒng)的作用 ..........................................................................................