【正文】 s range of products, the pany issued since 1976 the world39。s experience, while the injection molding process is very plex, plastic melt flow properties of different and everchanging products and die structure, process conditions vary, forming various defects, mold design often require repeated trialmode, maintenance mode can be put into production, with little of a successful, identify problems, not only to readjust the process parameters, or even to modify the plastic products and molds, not only timeconsuming and laborious, but also reduces product development time . The use of injection molding CAE technology in mold manufacturing prior to simulate injection molding process (including filling, packing and cooling) and the early detection of problems, optimize mold design and process conditions set to reduce the number of test mode in order to improve production efficiency, has bee a injection molding technology is an important direction of development.1 The history of Injection Molding CAE technologyInjection Molding CAE technology is based on plastics processing theology and heat transfer of the basic theory, the melt in the mold cavity in the flow, heat transfer physics, mathematical model, using numerical solution method of constructing the theory, the use of puter visualization technology image, visually simulate the dynamics of the actual shape of the melt filling and cooling process, an analysis techniques.The 20th century, 60 years, the United Kingdom, the United States and Canada and other countries of the scholars, such as (United Kingdom), (America), (Canada) and (America), etc. to carry out a series of plastic melt in the moldtype cavity flow and cooling of basic research. At a reasonable simplification, based on 60 years pleted a onedimensional flow and cooling analysis programs, 70 years to plete the twodimensional cooling analysis programs, and 80 years from the injection molding CAE technology has begun to theoretical research into the practical phase, launched a threedimensional flow and cooling analysis and the study extended to packing, fiber orientation and war page prediction of molecular and other fields. After 90 years carried out into the flow, packing, cooling and stress analysis, the whole process of injection molding processes are integrated technologies, for the injection mold design provides a reliable guarantee that its application is mold design in the history of a major change.2 The role of Injection Molding CAE technologyIt shows the design of injection molds using traditional methods and the use of injection molding CAE technical design features and differences in mold. It can be seen using traditional methods of design of injection mold design success will rely heavily on the experience of designers, but also for plex parts gate position is reasonable or not, the location of the exhaust slot settings, to determine the location of weld lines and so very difficult. Die in delivery will normally take before the test mode after repeated changes, until the products have been qualified, which inevitably led to the extension of the production cycle, and generally difficult to obtain an optimal design and process parameters. The use of injection molding CAE technical design, mold is not true, because of mold design concept stage, can make use of CAE technology in injection molding process simulation flow, making usually only in the mold tryout phases in order to find problems, such as short shots, weld lines or holes appear in the surface appearance of parts and other issues have been avoided. While helping the designer to plete the balance of the system, such as flow channel design, exhaust ducts, setting, rationally determine the injection molding process parameters, etc. , so that usually makes the must be repeated tryout to determine structural parameters 39。 展望隨著工業(yè)化飛速發(fā)展，無屑加工應(yīng)用越來越廣泛，尤其是注塑產(chǎn)品的應(yīng)用有極其廣闊的發(fā)展空間。2．通過對電源轉(zhuǎn)換插頭零件的結(jié)構(gòu)分析比較成功的對其進(jìn)行了冷卻系統(tǒng)和翹曲的技術(shù)參數(shù)的分析，優(yōu)化了參數(shù)并降低了產(chǎn)品的不合格率，起到了降低生產(chǎn)成本，本產(chǎn)品是企業(yè)實際效果很好的例子，充分說明了分析軟件在企業(yè)中的實際應(yīng)用效果。圖84 模具支架總裝左視圖圖85 模具支架仿真開模圖 本章小結(jié)模具支架主要用于零件大批量并且高精度的生產(chǎn)。推板上的頂桿則將兩個塑件頂出，完成脫模。經(jīng)過保壓、冷卻階段后，型腔中的物料冷凝，制品成型。開模時，先從定模板與剝料板之間分開，通過在定模板上的限位釘、拉料桿拉住剝料板和澆注系統(tǒng)凝料，定模板通過尼龍扣的作用與動模一起運動，則拉料桿會拉斷點澆口，當(dāng)澆注系統(tǒng)凝料離開定模板有足夠的空間時，通過限位釘?shù)淖饔猛瑫r拉動剝料板和定模板，使得主流道凝料脫離唧嘴。確保彈簧的穩(wěn)定和定位。使用合理型號的項針。注射在高壓鎖模完成后開始，注射時熔融塑料填充模腔．當(dāng)模腔填滿，壓力驟升．故注射的末端亦稱為擠壓段。在模具工作的時候，開模時液壓缸得到液壓力從而推動推件臂向開模的方向移動，推件臂上的卡子在推件臂的推動下推動定模座板開模。所以在本課題設(shè)計中采用了一種簡單且很實用的模具支架系統(tǒng)。 本章小結(jié)注射成型的過程中，使塑件從模具型腔和型芯上脫出的脫模機構(gòu)。 綜上所述，并結(jié)合本身塑件的結(jié)構(gòu)特點，本次設(shè)計主要采用簡單的脫模結(jié)構(gòu)即普通推桿，只起推出塑件的作用，本身僅端面參與成型。(4) 推出位置應(yīng)力求設(shè)在制品內(nèi)表面，并且不影響裝配之處；或?qū)ν庥^質(zhì)量影響不大的部位—尤其是選用推桿推出的結(jié)構(gòu)時，更當(dāng)注意。為此目的，必須：(1) 正確分析并計算制品的包緊力的大小、部位和阻力中心，以選擇適宜的脫模結(jié)構(gòu)，并使推出力的中心盡可能與脫模阻力中心重合。本章節(jié)還對工件翹曲原因進(jìn)行了分析，得出工件收縮的主要原因。引起收縮的主要原因是保壓壓力過低，因此對保壓壓力的設(shè)置進(jìn)行優(yōu)化，達(dá)到設(shè)計要求。綜合以上三種因素，翹曲分析結(jié)果如圖91所示：本文中塑件的總體翹曲如圖67（a）， mm 。(2)收縮不均勻：收縮不均勻是指不同區(qū)域之間的收縮不同而導(dǎo)致制品翹曲。 工件翹曲分析翹曲變形可以分為兩種形式，即穩(wěn)定翹曲和非穩(wěn)定翹曲。當(dāng)冷卻結(jié)束后，塑件溫度應(yīng)低于推出的頂出溫度，在材料PC+ABS中推薦的頂出溫度為117℃，從圖66（c）可以看出，保壓冷卻結(jié)束后塑件大部分區(qū)域在117℃以下，說明冷卻管道布局已經(jīng)相當(dāng)完善。采用上下各四條冷卻水道，中間兩條水道進(jìn)行分析。動模水道的布置形式與工作原理和定模水道的相同，這里不在進(jìn)行過多的介紹．具體布置形式請參見63和64所示為動模和動模水道圖：圖63 動模和動模水道圖水道連接我選用的是橡膠彎管和通用的水管接頭，這些材料無論從安裝上還是從性能和價格上都比較好．可將冷卻系統(tǒng)的水道連接好。冷卻水道在模具中具有非常重要的作用，它直接關(guān)系到注塑件的優(yōu)秀率數(shù)量和質(zhì)量。如下圖61和62所示為定模和定模水道圖：圖61 定模和定模水道圖 從上圖可以看出，冷卻水從進(jìn)水口進(jìn)入，在模具型腔的安裝位置周圍進(jìn)行水循環(huán)來達(dá)到散熱的目的，揖后熱水由出水口排出。當(dāng)模具溫度升高時可對模具進(jìn)行冷卻，從而可提高塑件品質(zhì)．延長模具使用壽命。這時就應(yīng)取消冷卻管道或重新設(shè)計．以降低冷卻效果，增大塑料的流動性。（2）串聯(lián)——并聯(lián)冷卻： 一般用于多型腔的冷卻．它可以保證每個支管中的流量相等。2．冷卻水路的連接方式（1）串聯(lián)冷卻： 這種形式應(yīng)用廣泛，流動僅取缺于進(jìn)出口之間的壓力差和通道阻力。因此澆口附近要加強冷卻通入冷水，而在溫度低的外側(cè)使經(jīng)過熱交換的溫水通過即可。除了塑件形狀和型腔設(shè)計的內(nèi)容之外，冷卻系統(tǒng)的設(shè)計是很重要的的，主要體現(xiàn)在以下幾方面：1．冷卻水孔數(shù)量盡量多，尺寸盡量大：型腔表面的溫度與冷卻水孔的大小和冷卻水的溫度有關(guān)。因此在本設(shè)計造型中我使用的是直流循環(huán)式的冷卻回路，考慮到動定模很小無法在其上開設(shè)冷卻回路且此設(shè)計的散熱要求不是很高，因而將冷卻水道分布設(shè)置在定模板和動模板中。冷卻回路的設(shè)計應(yīng)做到回路系統(tǒng)內(nèi)流動的介質(zhì)能充分吸收成型塑件所傳導(dǎo)的熱量，使模具成型表面的溫度穩(wěn)定地保持在所需的溫度范圍內(nèi)。純水冷卻展為普遍。圖53 零件鎖模力圖注射機的主要技術(shù)參數(shù)如表51所示：表51注射量：342 g注射方式:螺桿式鎖模力:1800 kN螺桿直徑:50 mm最大注射壓力：176 MPa螺桿轉(zhuǎn)數(shù)：10～220 r/min最大理論注射容積：383cm最大開模行程：420 mm模具厚度：200～460 mm頂出行程：150 mm合模方式：液壓機械液壓泵流量：110 L/min噴嘴孔徑：4 mm噴嘴半徑：R10 本章小結(jié)本章節(jié)主要介紹注塑機的