
注塑機調機的注塑過程是將已熔融的熱塑性塑料用壓力將它從一個已加熱的料筒注入閉合著的模具內,經過一段時間冷卻后,將模具分開,取出制成的制品。模具再閉合與塑料注入進行配合,形成有次序的操作過程,并不斷重復進行。注塑機通(tong)常由(you)注射系(xi)統(tong)(tong)(tong)、合模系(xi)統(tong)(tong)(tong)、液壓傳(chuan)達動(dong)系(xi)統(tong)(tong)(tong)、電氣控(kong)制系(xi)統(tong)(tong)(tong)、潤滑系(xi)統(tong)(tong)(tong)、加熱及冷卻系(xi)統(tong)(tong)(tong)、安全監測系(xi)統(tong)(tong)(tong)等組成(cheng)。?? ?
(1)注塑(su)(su)(su)(su)系統??注射(she)系統的(de)作用(yong):注射(she)系統是(shi)注塑(su)(su)(su)(su)機(ji)(ji)最主(zhu)要的(de)組成部(bu)分(fen)之一(yi),一(yi)般有柱塞式(shi)、螺(luo)桿(gan)式(shi)、螺(luo)桿(gan)預(yu)塑(su)(su)(su)(su)柱塞注射(she)式(shi)3種主(zhu)要形式(shi)。目前應用(yong)最廣泛的(de)是(shi)螺(luo)桿(gan)式(shi)。其作用(yong)是(shi),在(zai)(zai)注塑(su)(su)(su)(su)料機(ji)(ji)的(de)一(yi)個循環中(zhong),能在(zai)(zai)規定(ding)(ding)的(de)時間內將(jiang)一(yi)定(ding)(ding)數量的(de)塑(su)(su)(su)(su)料加熱塑(su)(su)(su)(su)化(hua)后(hou),在(zai)(zai)一(yi)定(ding)(ding)的(de)壓力(li)和速度下,通過螺(luo)桿(gan)將(jiang)熔(rong)融塑(su)(su)(su)(su)料注入模具型腔中(zhong)。注射(she)結束后(hou),對注射(she)到模腔中(zhong)的(de)熔(rong)料保持定(ding)(ding)型。?? 注射(she)系統的(de)組成:注射(she)系統由塑(su)(su)(su)(su)化(hua)裝(zhuang)置(zhi)(zhi)(zhi)和動(dong)力(li)傳遞裝(zhuang)置(zhi)(zhi)(zhi)組成。??螺(luo)桿(gan)式(shi)注塑(su)(su)(su)(su)機(ji)(ji)塑(su)(su)(su)(su)化(hua)裝(zhuang)置(zhi)(zhi)(zhi)主(zhu)要由加料裝(zhuang)置(zhi)(zhi)(zhi)、料筒、螺(luo)桿(gan)、射(she)咀(ju)部(bu)分(fen)組成。動(dong)力(li)傳遞裝(zhuang)置(zhi)(zhi)(zhi)包括注射(she)油(you)缸、注射(she)座移動(dong)油(you)缸以及螺(luo)桿(gan)驅動(dong)裝(zhuang)置(zhi)(zhi)(zhi)(熔(rong)膠(jiao)馬達)。? ?

(2)合(he)模(mo)系統??合(he)模(mo)系統的(de)(de)(de)作用(yong):合(he)模(mo)系統的(de)(de)(de)作用(yong)是保證(zheng)模(mo)具閉(bi)合(he)、開啟及頂出(chu)制(zhi)品。同(tong)時,在模(mo)具閉(bi)合(he)后(hou),供給予模(mo)具足夠(gou)的(de)(de)(de)鎖模(mo)力(li),以抵(di)抗熔融塑料(liao)進入(ru)模(mo)腔產生的(de)(de)(de)模(mo)腔壓力(li),防(fang)止模(mo)具開縫,造(zao)成制(zhi)品的(de)(de)(de)不(bu)良現狀。
(3)液壓(ya)(ya)系(xi)統(tong)(tong)?? 液壓(ya)(ya)傳(chuan)(chuan)動(dong)(dong)系(xi)統(tong)(tong)的作(zuo)用是實(shi)現注塑機(ji)按(an)工藝(yi)(yi)過程(cheng)所(suo)要(yao)(yao)求(qiu)的各種(zhong)動(dong)(dong)作(zuo)提供動(dong)(dong)力,并滿(man)(man)足(zu)注塑機(ji)各部分所(suo)需(xu)壓(ya)(ya)力、速(su)度、溫度等的要(yao)(yao)求(qiu)。它主要(yao)(yao)由各自(zi)種(zhong)液壓(ya)(ya)元件(jian)和(he)液壓(ya)(ya)輔(fu)助(zhu)元件(jian)所(suo)組(zu)成(cheng),其(qi)中油泵和(he)電(dian)機(ji)是注塑機(ji)的動(dong)(dong)力來(lai)源。各種(zhong)閥控制(zhi)油液壓(ya)(ya)力和(he)流量,從而滿(man)(man)足(zu)注射成(cheng)型(xing)工藝(yi)(yi)各項(xiang)要(yao)(yao)求(qiu)。?? ? (4)電(dian)氣控制(zhi)系(xi)統(tong)(tong)? 電(dian)氣控制(zhi)系(xi)統(tong)(tong)與液壓(ya)(ya)系(xi)統(tong)(tong)合(he)理配(pei)合(he),可實(shi)現注射機(ji)的工藝(yi)(yi)過程(cheng)要(yao)(yao)求(qiu)(壓(ya)(ya)力、溫度、速(su)度、時(shi)間)和(he)各種(zhong)程(cheng)序動(dong)(dong)作(zuo)。主要(yao)(yao)由電(dian)器、電(dian)子元件(jian)、儀(yi)表(biao)、加熱器、傳(chuan)(chuan)感(gan)器等組(zu)成(cheng)。一般有四(si)種(zhong)控制(zhi)方(fang)式(shi),手動(dong)(dong)、半(ban)自(zi)動(dong)(dong)、全自(zi)動(dong)(dong)、調整(zheng)。
(5)加(jia)(jia)熱(re)(re)(re)(re)(re)/冷(leng)(leng)卻(que)系(xi)統(tong)??? 加(jia)(jia)熱(re)(re)(re)(re)(re)系(xi)統(tong)是(shi)(shi)用(yong)(yong)來加(jia)(jia)熱(re)(re)(re)(re)(re)料(liao)(liao)(liao)(liao)筒(tong)及注射噴嘴(zui)的(de),注塑機料(liao)(liao)(liao)(liao)筒(tong)一(yi)般采用(yong)(yong)電熱(re)(re)(re)(re)(re)圈(quan)作(zuo)為加(jia)(jia)熱(re)(re)(re)(re)(re)裝(zhuang)置,安裝(zhuang)在料(liao)(liao)(liao)(liao)筒(tong)的(de)外部,并用(yong)(yong)熱(re)(re)(re)(re)(re)電偶分段檢測。熱(re)(re)(re)(re)(re)量通過(guo)筒(tong)壁導熱(re)(re)(re)(re)(re)為物料(liao)(liao)(liao)(liao)塑化(hua)提供熱(re)(re)(re)(re)(re)源;冷(leng)(leng)卻(que)系(xi)統(tong)主要(yao)是(shi)(shi)用(yong)(yong)來冷(leng)(leng)卻(que)油(you)溫(wen)(wen),油(you)溫(wen)(wen)過(guo)高(gao)會(hui)引起多種故障出現所(suo)以油(you)溫(wen)(wen)必須加(jia)(jia)以控制。另一(yi)處(chu)需要(yao)冷(leng)(leng)卻(que)的(de)位置在料(liao)(liao)(liao)(liao)管(guan)下(xia)料(liao)(liao)(liao)(liao)口附(fu)近(jin),防止原料(liao)(liao)(liao)(liao)在下(xia)料(liao)(liao)(liao)(liao)口熔(rong)化(hua),導致原料(liao)(liao)(liao)(liao)不能(neng)正常下(xia)料(liao)(liao)(liao)(liao)。
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