【正文】 .................................................................................................. 23 （一）卸料彈簧選擇： ............................................................................................ 23 （二）設(shè)計(jì)和選用卸料與出件零件 .......................................................................... 23 （三）選擇上、下模板及模柄 ................................................................................. 24 （四）墊板的結(jié)構(gòu)設(shè)計(jì)： ........................................................................................ 24 （五）閉合高度： ................................................................................................... 25 第三章 塑料模具設(shè)計(jì) ............................................. 26 一 .塑件工藝性分析： ..................................................................................................... 27 （一）塑料 .............................................................................................................. 28 （ 二）塑件的尺寸精度分析 ..................................................................................... 29 （三）塑件表面質(zhì)量分析 ........................................................................................ 29 （四）塑件收縮率 ................................................................................................... 29 （五）塑件結(jié)構(gòu)工藝性分析 ..................................................................................... 30 機(jī)電工程系 20xx 屆畢業(yè)生畢業(yè)論文（設(shè)計(jì)） 雙孔墊片沖壓 模具設(shè)計(jì)與制造 2 二．成型設(shè)備的選擇與模塑工藝參數(shù)的編制 ................................................................... 30 （一） 注射量的計(jì)算 .............................................................................................. 30 （二）塑件和流道凝料在分型面上的投影面積及鎖模力的計(jì)算 ................................ 30 （三） 塑料件注塑成型工藝參數(shù) ............................................................................ 32 （四）儀表外殼注射成型工藝卡 .............................................................................. 33 三．模具結(jié)構(gòu)方案的確定 ............................................................................................... 34 （一）分型面的選擇 ............................................................................................... 34 （二）型腔數(shù)量的確定及型腔的排列 ....................................................................... 35 （三）澆注系統(tǒng)的設(shè)計(jì) ............................................................................................ 35 （四）型芯和型腔結(jié)構(gòu)的確定 ................................................................................. 37 （五）推件方式的選擇 ............................................................................................ 38 四．成型零件工作尺寸的計(jì)算及其強(qiáng)度計(jì)算 ................................................................... 39 （一）型芯徑向尺寸 計(jì)算： ..................................................................................... 39 （二）型腔徑向尺寸計(jì)算： ..................................................................................... 39 （三）成型零件強(qiáng)度計(jì)算 ........................................................................................ 41 五．導(dǎo)向機(jī)構(gòu)的設(shè)計(jì) ...................................................................................................... 42 （一）導(dǎo)柱的設(shè)計(jì)要求 ............................................................................................ 42 （二）導(dǎo)套的設(shè)計(jì)要求 ............................................................................................ 42 六．模板厚度的確定 ...................................................................................................... 42 七 .確定排氣方式 ............................................................................................................ 43 （一）利用配合間隙排氣 ........................................................................................ 44 （二）在分型面上開(kāi)設(shè)排氣槽 ................................................................................. 44 （三）利用排氣塞排氣 ............................................................................................ 44 八．固定板、墊板及墊塊的確定 ..................................................................................... 44 九． 注射機(jī)有關(guān)參數(shù)的校核 ............................................................................................ 45 十．排氣系統(tǒng)的設(shè)計(jì) ...................................................................................................... 45 參考文獻(xiàn)： ..................................................... 47 致 謝 ........................................................ 48 機(jī)電工程系 20xx 屆畢業(yè)生畢業(yè)論文（設(shè)計(jì)） 雙孔墊片沖壓 模具設(shè)計(jì)與制造 3 雙孔墊片沖壓 模具設(shè)計(jì)與制造 摘要： 雙孔墊片沖壓 模具設(shè)計(jì)與制造 ，通過(guò)對(duì)沖壓件的分析以及消化，本套模具結(jié)構(gòu)比較簡(jiǎn)單。明確了設(shè)計(jì)思路，確定了沖壓成型工藝過(guò)程并對(duì)各個(gè)具體部分進(jìn)行了詳細(xì)的計(jì)算和校核。根據(jù)三維圖繪制模具二維裝配圖和零件圖。 該套模具為成型塑料表箱蓋外殼的模具，考慮到塑料件的體積大小以及精度等方面的要求，該模具采用一模一腔， 分型面按照其設(shè)計(jì)原則，應(yīng)在塑件的最大輪廓處，該模具工作原理比較簡(jiǎn)單，成型過(guò)程也很簡(jiǎn)單。最終，綜合以上所有因素完成本次塑料制件的成型工藝及模具設(shè)計(jì)。 Based on mapping threedimensional mold assembly drawings and parts of twodimensional map. Gasket with two holes through the stamping die design, consolidate and deepen the knowledge, and achieved satisfactory results, to achieve the desired design intent. The mold for molding plastic table cover mold shell, taking into account the volu me of plastic parts, such as size and accuracy requirements, the use of a mold of a mold cavity surface in accordance with its design principles, should be the largest in the plastic parts profile, the working principle of the relatively simple tooling, molding process is very simple. Cover plastic parts of the structure and molding characteristics, the choice of molding, mold core pulling a lateral agencies and institutions to launch putter Launch molding plastic parts, and plastic molding of the gating system, layout, pouring I choose locations, in order to increase production efficiency and ensure the balance of mold choose a mode of a cavity layout, in accordance with the relevant information and experiences are relatively reasonable solution. Ultimately, integrated all of the above factors in the pletion