螺杆影響塑化質量的因素

螺杆影響塑化質量的因素 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)。 chuyujialiaoduanneidewuliaobixujiaredaolinjiewendu，cainengchanshengguanjianderongrongmoceng。ranerchangchangshiwuliaozaijitongzhongzhiliushijiantaiduanbunengshijuhewudadaogaiwendu。zhezhongqingkuangdefashengkenengshiyouyushebeiguimotaixiao
，xiangyingpeizhijiaoxiaodejitongheluogansuozaochengde。tingliushijianguoduanyizaochengjuhewurongronghuohunhebuchongfen，congerhuidaozhiluogandahuahuotingzhuan。 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)。 設she置zhi過guo高gao的de背bei壓ya也ye會hui導dao致zhi螺luo杆gan停ting轉zhuan或huo打da滑hua。提ti高gao背bei壓ya設she定ding值zhi也ye就jiu提ti高gao了le進jin入ru到dao物wu料liao中zhong的de能neng量liang。如ru果guo背bei壓ya設she定ding過guo高gao，那na麼me螺luo杆gan也ye許xu不bu能neng產chan生sheng足zu夠gou的de向xiang前qian輸shu送song熔rong體ti壓ya力li，以yi克ke服fu背bei壓ya的de反fan壓ya
，螺luo杆gan就jiu會hui在zai某mou個ge位wei置zhi旋xuan轉zhuan不bu會hui後hou退tui
，這zhe樣yang會hui對dui熔rong體ti做zuo更geng多duo的de功gong並bing顯xian著zhu提ti高gao熔rong體ti溫wen度du
，從cong而er對dui製zhi品pin質zhi量liang和he循xun環huan周zhou期qi產chan生sheng不bu利li影ying響xiang。施shi加jia在zai熔rong體ti上shang的de背bei壓ya可ke以yi通tong過guo注zhu射she機ji筒tong上shang的de控kong製zhi閥fa進jin行xing調tiao節jie。