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ith foreign. Molding process, the multimaterial plastic molding, efficient multicolor injection molding, inserts swap structure and innovation Pulling the release mechanism has also made great progress. Gasassisted injection molding technology using more mature, such as Qingdao Hisense Mould Co., Ltd., Tianjin munications and broadcasting pany mold factory and other manufacturers successfully on 29 to 34inch TV and some thickwalled shell mold parts using gasassisted technology, some of the Manufacturers also used the CMOLD gasassisted software, to achieve better results. Pres panies such as Shanghai New users will be able to provide gasassisted mol。s 10station crosslinked EVA foam injection molding machine, injection molding machines and by one circumferentially arranged 10 sets of injection mold position, which in turn die 10 is moved to the injection molding machine prior to injection molding, injection after being mold on the move needs to be done stereotypes, mold, remove the article, a model of the process, all these processes automatically controlled by a puter. The crosslinked foam injection unit will be mediumsized plastic injection molding process is continuous, 華東交大畢業(yè)設(shè)計(jì) improve the productivity of injection molding machine [2]. French BILLION pany doubleinjection, rotatable mold injection technology, two male parallel placed on a rotatable support structure, two injection molding machines simultaneously into the respective mold injection of different materials, and then open the mold, the male mold scaffolding after moving forward rotated 180 degrees, where color products on a male mold is removed, and the next injection molding work. The doubleinjection equipment to improve the level and continuous operation of space equipment pactness. (3) Application picture screw injection molding technology. INSHOT pany introduced color picturescrew injection molding techniques, can be called coinjection molding technology a major breakthrough. This injection molding equipment is mainly posed of a cylinder, two picturescrew and two sets of transmission ponents. The large cavity as small screw screw screw barrel posed picture, the two screws rotate with a respective moving two independent drive system is controlled by the injection mold structure is relatively simple, greatly reducing the coinjection molding molding technology equipment needed costs. In addition, foreign in pression molding and blow molding automation and continuous production technology also has great progress. Such as Italy Sacmi quick succession Su cap pressure molding machine, mainly by 1 sheet extrusion machines, automatic slicing with rapidly rotating mechanism 64 sets caps pression molds of ponents. Extruded sheet is cut into the whereabouts of the female mold, the male mold and a female mold clamping, mold stereotypes by a twist Actuator male mold on the cap removed. This equipment can be made per minute the fastest 1200 plastic caps, high production efficiency is currently in the country is difficult to see [2]. In contrast, the domestic phase plastic mold is much behind than abroad, most currently used is a singlecavity mold cavity simply more than 70%, still dominated by a sophisticated multicavity plastic injection molding multicolor plastic injection molding has been able preliminary design and manufacturing, but there are a lot of precision molds have to rely on imports. However, the country started to die from now through half a century of development, the mold industry has been greatly developed, in 1999 China39。但是在老師的指導(dǎo)下通過(guò)問(wèn)題的提出與解決,使我對(duì)這方面的知識(shí)有了更深的理解, 并且學(xué)習(xí)到了更多的新知識(shí)。通過(guò)查找資料的過(guò)程中,使我對(duì)模具這方面的知識(shí)有了新的認(rèn)識(shí)和理解,模具是一個(gè)高附加值技術(shù)密集的產(chǎn)業(yè),我們國(guó)家的制造業(yè)發(fā)展迅速,這對(duì)模具提出了新的要求,所以說(shuō)模具技術(shù)的提高與開(kāi)發(fā)大有文章可做。 ( 6) 在裝配傳動(dòng)系統(tǒng)(液動(dòng)和氣動(dòng))管路之間的連接是否合格 。 ( 2) 裝配導(dǎo)套導(dǎo)柱機(jī) 構(gòu)時(shí)需要保障開(kāi)合模的動(dòng)作輕靈沒(méi)有晃動(dòng)阻滯現(xiàn)象的發(fā)生 。這個(gè)時(shí)間標(biāo)準(zhǔn)通常是以充分固化定型,而且保證了制品具備一定強(qiáng)度和剛度為依據(jù),它占到整個(gè)注射生產(chǎn)周期的80%,這個(gè)時(shí)間和制品的壁厚的材料有著直接的關(guān)系,根據(jù)我們的制品厚度為 毫米,材料為 pvc,查課本《塑料成型工藝及模具設(shè)計(jì)》第 210頁(yè),得到這個(gè)時(shí)間是 秒。我們的冷卻系統(tǒng)主要針對(duì)型芯,根據(jù)我們產(chǎn)品是小型模具的特點(diǎn),把冷卻系統(tǒng)安置在了型芯上。在產(chǎn)品成型的過(guò)程中,模具的溫度會(huì)對(duì)我們材料的充型、定型、成型和產(chǎn)品的質(zhì)量有著密切的關(guān)系,并且對(duì)我們產(chǎn)品的成型周期起著至關(guān)重要的最用,所以冷卻系統(tǒng)的合理設(shè)計(jì)是整個(gè)模具設(shè)計(jì)中不可或缺的一環(huán)。 脫模力的計(jì)算 脫模力的計(jì)算公式有四個(gè),根據(jù)塑件的圓形內(nèi)孔半斤與壁厚之比 m=tr (矩形塑件 m= tbaπ? )與 10進(jìn)行比較,再然 后根據(jù)塑件橫截面形狀是矩形還是圓形。 肥皂盒注塑模具設(shè)計(jì) 21 推桿的結(jié)構(gòu) 推桿有多種結(jié)構(gòu),如下圖: 圖 推桿形狀圖 在本設(shè)計(jì)中運(yùn)用到的推桿就是第一種,可以看到推桿圓形截面。 脫模機(jī)構(gòu)分類以及選擇 脫模機(jī)構(gòu)分為好多種,按照不同的分類方式來(lái)進(jìn)行區(qū)分。 圖 61 導(dǎo)柱導(dǎo)向圖 在設(shè)計(jì)中采用導(dǎo)柱導(dǎo)向機(jī)構(gòu),導(dǎo)套與模板是過(guò)渡配合的帶頭套的導(dǎo)套機(jī)構(gòu)我們都是從標(biāo)準(zhǔn)模架里面調(diào)出來(lái)的。具體看下面圖所示。綜上考慮我們采用一 模兩腔的結(jié)構(gòu)形式。最后裝配出來(lái)的零件時(shí)一模兩腔的型芯和型腔。因此必須重視分型面的設(shè)計(jì)與選擇。在設(shè)計(jì)中澆口采用的形式是側(cè)澆口,在 毫米之間,澆口的橫截面積S=**= = ,所以澆口是符合要求的。 華東交大畢業(yè)設(shè)計(jì) 設(shè)計(jì)分流道 分流道是主流道與澆口相連的通道,通常是設(shè)計(jì)在分型面上,起到的作用是轉(zhuǎn)向和分流。 ( 5) 主流道村套一般采用 T T10制造,熱處理強(qiáng)度 5256HRC。 主流道的設(shè)計(jì) 主流道是用來(lái)連接注射機(jī)和分流道的樞紐,一般情況下與注射機(jī)噴嘴在同一軸線上,斷面是圓形的,而且?guī)в幸欢ǖ腻F度,它的主要設(shè)計(jì)要點(diǎn)如下: ( 1) 主流道圓錐角度 20 60 ,我們?cè)O(shè)計(jì)采用 20 ,對(duì)于流動(dòng)性較差的塑件可取度數(shù)稍加大點(diǎn),內(nèi)壁不能太粗糙,否則會(huì)引起熔體凝滯,一般內(nèi)壁粗糙度為。 C=(C1 +C1 )+K 式子中: C— 型腔深度的實(shí)際尺寸 C1 — 制件相應(yīng)的上限尺寸 ? mm 算得 C= 型芯高度的計(jì)算 計(jì)算型芯高度的時(shí)候,尺寸要選大一點(diǎn),留有縮短到的余地,能方便調(diào)整型芯的長(zhǎng)度。 ( 4) 在安裝模具是或多或少會(huì)產(chǎn)生配合誤差,它是由于成型零件配合間隙產(chǎn)生變化而引起的,生產(chǎn)過(guò)程中會(huì)引起塑料件的尺寸發(fā)生變化。再單擊 進(jìn)入界面定義型腔切口,把我們的參數(shù)輸入進(jìn)去,具體的如下圖: 如圖 24 型腔切口參數(shù)圖 此時(shí)模架的整體框架我們就定 義好了,系統(tǒng)會(huì)自動(dòng)生成這些結(jié)構(gòu)。 模架的選擇 首先先打開(kāi)裝好了 EMX 的 proe,我們先定義一個(gè) EMX 項(xiàng)目這時(shí)候系統(tǒng)彈出如下圖的窗口,我們可以在這個(gè)項(xiàng)目框里定義 EMX 項(xiàng)目的名稱,也就是之后我們的模架的名稱,單位在這里選擇毫米,項(xiàng)目類型為裝配,其他的只需要默認(rèn)的就行,然后勾選就可以了。這種情況有可以分為兩種類型: ( 1)單分型面注射模開(kāi)模行程 H S≥H= 1H + 2H +(5~10)mm 式子中, 1H — 塑料件的推出距離(可以視為凸模的高度) ( mm); 2H — 包含加注系統(tǒng)在內(nèi)的塑料件高度 ( mm); S— 注射機(jī)移動(dòng)板的最大行程 ( mm); H— 需要的開(kāi)模行程 ( mm)。為了保證模具能夠順利的完成生產(chǎn)完整的模具,要求注射機(jī)的額定鎖模力一定大于這個(gè)膨脹力,即: F 鎖 ≥F 脹 =A 分 P 型 式子中: F 鎖 — 注射機(jī)額定鎖模力( N); P 分 — 模具型腔中熔體塑料的平均壓力( MPa);一般這個(gè)值是注射壓力的 ~ 倍,常取這個(gè)值為 20~40MPa,我們這里取 P 分 =30MPa; A 分 — 表示塑件加上整個(gè)澆注系統(tǒng)在分型面的投影面積( 2cm ) 由 proe 分析 /面積,可得投影面積為 2cm ,澆注系統(tǒng)的投影面積不超過(guò) 10 2cm F 鎖 ≥F 脹 =A 分 P 分 =14320030= 510