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s Day. More and more young Chinese people begin to celebrate this day in a very similar way as that in western countries. Fewer people than ever will gaze at the heavens on Saturday to pick out the two stars shining bright on either side of the Milky Way, that is, if people even know on which day Qixi falls. There are ready reminders dotted about, in the form of big ads saying Sales on Chinese Valentine39。s time for the wild fruits to ripe. The picturesque Arxan in Autumn is indeed a fairyland only exists in a dream that satisfies all your fantasies. If it rains heavily on Saturday night, some elderly Chinese will say it is because Zhinu, or the Weaving Maid, is crying on the day she met her husband Niulang, or the Cowherd, on the Milky Way. Most Chinese remember being told this romantic tragedy when they were children on Qixi, or the Seventh Night Festival, which falls on the seventh day of the seventh lunar month, which is usually in early August. This year it falls on Saturday, August 2. Folklore Story As the story goes, once there was a cowherd, Niulang, who lived with his elder brother and sisterinlaw. But she disliked and abused him, and the boy was forced to leave home with only an old cow for pany. The cow, however, was a former god who had violated imperial rules and was sent to earth in bovine form. One day the cow led Niulang to a lake where fairies took a bath on earth. Among them was Zhinu, the most beautiful fairy and a skilled seamstress. The two fell in love at first sight and were soon married. They had a son and daughter and their happy life was held up as an example for hundreds of years in China. Yet in the eyes of the Jade Emperor, the Supreme Deity in Taoism, marriage between a mortal and fairy was strictly forbidden. He ordered the heaven troop to catch Zhinu back. Niulang grew desperate when he discovered Zhinu had been taken back to heaven. Driven by Niulang39。在此向我的指導(dǎo)老師 — 成立表示深深的感謝和崇高的敬意。在這里一切都必須遵守公司的規(guī)章制度,即使犯了很小的錯(cuò)誤都要付出很大的代價(jià)。 熱流道系統(tǒng)加熱測試,通過溫控箱圖 66 所示對(duì)分流板進(jìn)行加熱測試 。 2. 檢測方法 根據(jù)圖紙上標(biāo)示出的板厚以及各個(gè)位置的公差值,用探頭來測定分流板加工是否合格。 圖 31 MAZAKE 銑床 圖 32 槍鉆 圖 33 壓線機(jī) 圖 34 平面磨床 (一)壓線機(jī)的介紹 壓線機(jī)是用來將已經(jīng)放進(jìn)到槽中的發(fā)熱絲上上部的銅條進(jìn)行擠壓作用,讓其深深地壓入到槽,于分流板之間的整合度更加完美。 5. 壓線,使用壓線機(jī)如圖 33 所示將折彎好的發(fā)熱絲壓入發(fā)熱絲槽內(nèi)。 其中 分流板加工流程 如下 : 1. 開外形,從整塊大的鋼板中使用 MAZAKE 銑床 加工中心如圖 31 銑出 多塊分流板。 帶起確認(rèn)無誤后,客戶會(huì)根據(jù)該圖紙對(duì)自己模具進(jìn)行開框。 放置電磁閥排放氣路,電磁閥通過氣路輸送氣體來控制氣缸,上下活動(dòng)閥針來控制膠體的進(jìn)入型腔,此步驟由于客戶需要避開模板上的零件客戶會(huì)自行排布之后該份圖紙打印出來由各組領(lǐng)導(dǎo)審核,完畢之后,繪制 3D,我司 3D 主要包含客戶模板的開框,及我司系統(tǒng)在客戶開框中放置的位置。之后標(biāo)準(zhǔn)各加工點(diǎn)坐標(biāo)位置以便客戶加工如圖 513。 之后再模板中心放置注射咀(用于連接注射機(jī)炮嘴)。 12 12 圖 59 分流板開框 開框是為了把我們的系統(tǒng)放入,圖中綠色挖框是我們系統(tǒng)加熱裝置及 感溫裝置出線槽,下方的排污槽是為了排除安裝生產(chǎn)過程中產(chǎn)生的廢氣物,出現(xiàn)槽的上方會(huì)有接線盒對(duì)我們系統(tǒng)加熱裝置及感溫裝置的線進(jìn)行接線,用來連接溫控箱。 之后排布分流板外形,如圖 57分流板形狀。 設(shè)計(jì)時(shí)優(yōu)先要使點(diǎn)位到注射咀流程最小,兩點(diǎn)之間直線最短,所以選擇 X 形的 流到 排布如9 9 圖 55。 (8) 流道板和噴嘴之間無泄漏。 (4) 排除“ 死角 ” ,以防止熔體在流道內(nèi)滯留。熱流道的形式與模腔分布相匹配 ,通常也采用對(duì)稱模式 ,以保證熔體流動(dòng)中的自然平衡。流道由打孔而成 ,且必須經(jīng)過拋光 ,以保證沒有死角 ,并 盡量的減少流體的滯留。對(duì)圖 52 進(jìn)行插板拆除多余留下前兩塊板及模具點(diǎn)位如圖 53。 6 6 圖 51 打印機(jī)碳粉盒模具標(biāo)準(zhǔn) 2D 視圖 (在附錄中附上面各大圖) 從圖中可以獲取相關(guān)信息,找出模具的定模部分如 圖 52 所示 。 4. 為使塑件能迅速從模具中取出,塑料的熱變形為年度要高。 7) 避免系統(tǒng)內(nèi)塑件滯留,采用內(nèi)熱式的分流板,熱咀與與魚雷棒具有較大的絕熱倉、 8) 在主流道和注射咀的系統(tǒng)里,保持無泄漏。 1) 澆口的直徑應(yīng)很小并有銳邊,設(shè)有圓筒狀部分,足以使流到破裂后分離 2) 使用開關(guān)式噴嘴,以阻止主流道斷開位置上出現(xiàn)凹陷。 3) 除了注塑 PVC 和 CA,整個(gè)熱流道 系統(tǒng)準(zhǔn)許有較大的溫度波動(dòng)。 11. 分流板小形同適用于熱敏性塑料,減少熔體在流到內(nèi)的時(shí)間換色:大系統(tǒng)流動(dòng)性差,流到徑 /質(zhì)量( l/g)高剪切敏感的材料。不然會(huì)造成漏氣。 5. 系統(tǒng)不能泄露。 ( 五 ) 熱流道系統(tǒng)的使用要求 1. 澆口由于剪切速率造成溫度升高,需要相應(yīng)的溫度補(bǔ)償。按澆口 來分, 如圖 42 所示。 5. 熱流道系統(tǒng)會(huì)增加模具的厚度,有可能會(huì)超過注塑機(jī)的模具厚度 。 (三) 熱流道的局限性 1. 根