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I 目錄 1 緒 論 .........................................................1 1.1 注射成型的概述 .........................................................1 1.2 我國(guó)塑料模具工業(yè)的發(fā)展現(xiàn)狀 .............................................2 1.3 國(guó)際塑料模具工業(yè)的發(fā)展現(xiàn)狀 ............................................3 1.4 我國(guó)塑料模具工業(yè)和技術(shù)今后的主要發(fā)展方向 ..............................3 1.5 本次設(shè)計(jì)的目的 .........................................................4 2 塑件成型工藝性分析 ...........................................6 2.1 塑件(塑料手柄)分析 ..................................................6 2.1.1 塑料手柄的塑件圖如下所示: ...........................................6 2.1.2 塑件分析 ............................................................6 2.1.3 成型工藝分析如下 ....................................................6 2.2 ABS 的注射成型過(guò)程及工藝參數(shù) ...........................................7 2.2.1 注射成型過(guò)程 .........................................................7 2.2.2ABS 的注射工藝參數(shù) ....................................................7 2.2.3ABS 的物力和化學(xué)特性 ..................................................8 3 擬定模具結(jié)構(gòu)形式 .............................................9 3.1 分型面的選擇 ...........................................................9 3.1.1 分型面的選擇原則 .....................................................9 3.1.2 分型面的確定 ........................................................9 3.2 型腔數(shù)目的確定 ........................................................10 4 注塑機(jī)型號(hào)的確定 .............................................12 4.1 所需注射量的計(jì)算 ......................................................12 4.2 塑件和流道凝料在分型面上的投影面積及所需鎖模力的計(jì)算 ..................12 4.3 選擇注塑機(jī) ............................................................13 4.4 注塑機(jī)有關(guān)參數(shù)的校核 ..................................................14 4.4.1 型腔數(shù)量的校核 ......................................................14 4.4.2 注塑機(jī)工藝參數(shù)的校核 ................................................15 II 4.4.3 安裝尺寸 ............................................................15 4.4.4 開(kāi)模行程的校核 ......................................................16 5 澆注系統(tǒng)的形式和澆口的設(shè)計(jì) ...................................17 5.1 主流道的設(shè)計(jì) ..........................................................17 5.1.1 主流道設(shè)計(jì)要點(diǎn) ......................................................17 5.1.2 主流道尺寸 ..........................................................18 5.1.3 主流道襯套的固定 ....................................................18 5.2 冷料穴的設(shè)計(jì) ..........................................................18 5.3 分流道的設(shè)計(jì) ..........................................................19 5.3.1 分流道的長(zhǎng)度 ........................................................19 5.3.2 分流道的形狀及尺寸 ..................................................20 5.3.3 分流道的表面粗糙度 ..................................................20 5.4 澆口的設(shè)計(jì) ............................................................20 5.4.1 澆口的形式 ..........................................................21 5.4.2 澆口位置的選擇 ......................................................21 5.4.3 澆口尺寸的確定 ......................................................22 5.5 澆注系統(tǒng)的平衡 ........................................................22 5.6 澆注系統(tǒng)凝料體積計(jì)算 ..................................................22 5.7 澆注系統(tǒng)各截面流過(guò)熔體的體積計(jì)算 ......................................23 6 成型零件的結(jié)構(gòu)設(shè)計(jì)和計(jì)算 .....................................24 6.1 成型零件的結(jié)構(gòu)設(shè)計(jì) ....................................................24 6.2 成型零件工作尺寸的計(jì)算 ................................................24 6.2.1 根據(jù)側(cè)壁厚校核強(qiáng)度、剛度 ............................................27 6.2.2 根據(jù)底板厚度校核強(qiáng)度、剛度 ..........................................27 7 模架的確定和標(biāo)準(zhǔn)件的選用 .....................................29 8 合模導(dǎo)向機(jī)構(gòu)的設(shè)計(jì) ..........................................31 8.1 導(dǎo)向結(jié)構(gòu)的總體設(shè)計(jì) ...................................................31 8.2 導(dǎo)柱設(shè)計(jì) .............................................................32 III 8.3 導(dǎo)套設(shè)計(jì) .............................................................32 9 脫模推出機(jī)構(gòu)的設(shè)計(jì) ..........................................34 10 側(cè)向抽芯機(jī)構(gòu)的設(shè)計(jì) .........................................35 10.1 抽芯距與抽芯力的計(jì)算 ................................................35 10.2 斜導(dǎo)柱截面尺寸的確定 ................................................36 11 排氣系統(tǒng)的設(shè)計(jì) .............................................38 12 溫度調(diào)節(jié)系統(tǒng)設(shè)計(jì) ...........................................39 12.1 冷卻時(shí)間的計(jì)算 ......................................................39 12.2 冷卻管道傳熱面積及管道數(shù)目的簡(jiǎn)易計(jì)算 ................................40 13 典型零件的制造加工工藝 .....................................43 14 繪制模具總裝圖 ..............................................44 結(jié)束語(yǔ) ........................................................45 致謝 ..........................................................46 參考文獻(xiàn) ......................................................47 IV