螺杆加工打滑不下料的原因

螺杆加工打滑不下料的原因 注(zhu)塑(su)機(ji)螺(luo)杆(gan)在(zai)加(jia)料(liao)口(kou)產(chan)生(sheng)壓(ya)料(liao)困(kun)難(nan)時(shi)，或(huo)沿(yan)著(zhe)機(ji)筒(tong)長(chang)度(du)不(bu)能(neng)形(xing)成(cheng)足(zu)夠(gou)的(de)粘(zhan)著(zhe)力(li)以(yi)輸(shu)送(song)物(wu)料(liao)，那(na)麼(me)注(zhu)塑(su)機(ji)螺(luo)杆(gan)就(jiu)發(fa)生(sheng)了(le)打(da)滑(hua)現(xian)象(xiang)。在(zai)注(zhu)塑(su)機(ji)螺(luo)杆(gan)預(yu)塑(su)階(jie)段(duan)


，注(zhu)塑(su)機(ji)螺(luo)杆(gan)在(zai)機(ji)筒(tong)內(nei)旋(xuan)轉(zhuan)沿(yan)著(zhe)螺(luo)杆(gan)方(fang)向(xiang)輸(shu)送(song)物(wu)料(liao)並(bing)後(hou)退(tui)積(ji)累(lei)物(wu)料(liao)準(zhun)備(bei)下(xia)一(yi)次(ci)注(zhu)塑(su)時(shi)，注(zhu)塑(su)機(ji)螺(luo)杆(gan)也(ye)會(hui)發(fa)生(sheng)打滑。如果注塑機螺杆在預塑階段開始打滑，那麼在螺杆繼續旋轉時，螺杆的軸向運動會停止。通常螺杆打滑會導致物料在注塑之前發生降解，還會出現短射、加工循環周期延長等製品質量問題。 注塑機螺杆出現打滑的原因包括背壓太高、機筒後半段過熱或過冷、機筒或螺杆磨損
、螺杆加料段螺槽太淺、料鬥設計不當
、料鬥缺料或堵塞、樹脂潮濕、樹脂中潤滑劑含量過高、物料粒度太細，使用的樹脂切割形狀不佳或是再生料。 1、工藝參數的影響 機(ji)筒(tong)後(hou)段(duan)溫(wen)度(du)低(di)通(tong)常(chang)是(shi)造(zao)成(cheng)注(zhu)塑(su)機(ji)螺(luo)杆(gan)打(da)滑(hua)的(de)主(zhu)要(yao)原(yuan)因(yin)。注(zhu)塑(su)機(ji)機(ji)筒(tong)分(fen)為(wei)三(san)段(duan)，在(zai)加(jia)料(liao)段(duan)後(hou)部(bu)
，物(wu)料(liao)在(zai)加(jia)熱(re)壓(ya)縮(suo)過(guo)程(cheng)中(zhong)形(xing)成(cheng)一(yi)層(ceng)熔(rong)融(rong)聚(ju)合(he)物(wu)薄(bo)層(ceng)。熔(rong)融(rong)膜(mo)層(ceng)貼(tie)在(zai)機(ji)筒(tong)上(shang)。如(ru)果(guo)沒(mei)有(you)這(zhe)一(yi)薄(bo)層(ceng)，粒(li)料(liao)就(jiu)很(hen)難(nan)向(xiang)前(qian)輸(shu)送(song)。 處chu於yu加jia料liao段duan內nei的de物wu料liao必bi須xu加jia熱re到dao臨lin界jie溫wen度du，才cai能neng產chan生sheng關guan鍵jian的de熔rong融rong膜mo層ceng。然ran而er常chang常chang是shi物wu料liao在zai機ji筒tong中zhong滯zhi留liu時shi間jian太tai短duan不bu能neng使shi聚ju合he物wu達da到dao該gai溫wen度du。這zhe種zhong情qing況kuang的de發fa生sheng可ke能neng是shi由you於yu設she備bei規gui模mo太tai小xiao，相xiang應ying配pei置zhi較jiao小xiao的de機ji筒tong和he螺luo杆gan所suo造zao成cheng的de。停ting留liu時shi間jian過guo短duan易yi造zao成cheng聚ju合he物wu熔rong融rong或huo混hun合he不bu充chong分fen
，從cong而er會hui導dao致zhi螺luo杆gan打da滑hua或huo停ting轉zhuan。 現xian在zai介jie紹shao出chu現xian該gai問wen題ti的de兩liang個ge簡jian單dan處chu理li方fang法fa。從cong機ji筒tong末mo端duan開kai始shi加jia人ren少shao量liang物wu料liao進jin行xing清qing洗xi，並bing且qie檢jian査zha熔rong融rong溫wen度du。如ru果guo停ting留liu時shi間jian短duan
，那na麼me熔rong融rong溫wen度du會hui低di於yu機ji筒tong溫wen度du的de設she定ding值zhi。第di二er種zhong方fang法fa是shi觀guan察cha成cheng型xing製zhi品pin，如ru果guo發fa現xian有you如ru大da理li石shi斑ban紋wen、黑點或淡條紋

，那就表明物料在機筒內沒有得到很好的混煉。 出chu現xian螺luo杆gan打da滑hua嚐chang試shi的de解jie決jue方fang法fa之zhi一yi是shi，逐zhu漸jian提ti升sheng加jia料liao段duan的de溫wen度du
，直zhi到dao螺luo杆gan旋xuan轉zhuan和he後hou退tui達da到dao協xie調tiao一yi致zhi。有you時shi不bu得de不bu將jiang機ji筒tong溫wen度du提ti高gao到dao推tui薦jian設she定ding值zhi以yi上shang才cai能neng達da到dao這zhe一yi範fan圍wei。 shezhiguogaodebeiyayehuidaozhiluogantingzhuanhuodahua。tigaobeiyashedingzhiyejiutigaolejinrudaowuliaozhongdenengliang。ruguobeiyashedingguogao
，nameluoganyexubunengchanshengzugoudexiangqianshusongrongtiyali，yikefubeiyadefanya，luoganjiuhuizaimougeweizhixuanzhuanbuhuihoutui，zheyanghuiduirongtizuogengduodegongbingxianzhutigaorongtiwendu，congerduizhipinzhilianghexunhuanzhouqichanshengbuliyingxiang。shijiazairongtishangdebeiyakeyitongguozhushejitongshangdekongzhifajinxingtiaojie。