Iplastiki ye-extrusion ye-tube, i-hose kunye nombhobho yinkqubo ezinzileyo yokuguqula i-thermoplastic ekrwada kwimveliso ye-annular egqityiweyo okanye ekufutshane.Impahla ekrwada idla ngokuba luhlobo lweepeliti zeplastiki okanye umgubo.Ukuguqulwa kwenzeka ngokwenza i-homogeneous ubunzima obutyhidiweyo kwi-extruder kunye nokunyanzelisa phantsi koxinzelelo nge-extrusion die orifice echaza ubume becandelo lomnqamlezo wemveliso.Izinto ezenziweyo, okanye i-extrudate, ipholile kwaye itsalwe kude ne-die exit kwizinga elilawulwayo.I-extrudate inokulimala kwi-spool, isikwe kubude obuchaziweyo, okanye iqondiswe kwenye inkqubo yomgca.
Ngokuchasene nokubumba isitofu okanye ukubunjwa kokuvuthela, eziziinkqubo ze-cyclic, i-extrusion yinkqubo yokuzinza.Olu phawu lwemeko ezinzileyo luvelisa izibonelelo ezithile kunye nemingeni njengenkqubo yokuvelisa.Iimveliso ezikhutshiweyo zinde kakhulu kwaye ziyaqhubeka, kwaye zinecandelo elinqamlezayo elihlala lihlala lihlala ngokumalunga ne-axis okanye isalathiso sokuvelisa.Iimveliso ezibunjiweyo ze-injection zizinto ezicacileyo ezinamacandelo ahlukeneyo anqamlezayo kwi-axis nganye.Inyaniso yokuba i-extrusion ye-tube, i-hose kunye nombhobho yinkqubo ezinzileyo iya kuxutyushwa kwiindawo ezininzi zeli nqaku.Igama elisetyenziselwa ukuchaza i-tube, i-hose kunye nepayipi iyahluka kwishishini ukuya kwishishini.
Izixhobo
Amacandelo amakhulu etyhubhu, i-hose, okanye inkqubo yokukhutshwa kombhobho zihlala zihlulwe zibe ngamacandelo aphezulu e-extruder, i-extruder ngokwayo, kunye nalawo aphantsi kwe-extruder.Amacandelo aphezulu aquka izixhobo zokuphatha i-resin yokuhambisa izinto eziluhlaza kwi-extruder, kunye nezixhobo zokulungisa i-resin eziza kutshisa i-resin kwangaphambili, okanye ukulawula umxholo wokufuma we-resin ngaphambi kokuba ingene kwi-extruder feed throat.Amacandelo asezantsi aquka isihluzo esinyibilikisiweyo seresin okanye umjikijeli wekhusi, indibano yokufa ye-extrusion, ukucima okanye itanki yokulinganisa ivacuum, naziphi na izixhobo zokulinganisa imveliso, umlawuli wesantya somgca we-extrusion ngendlela yebhanti yokutsala okanye iseti ye-nip roll, kwaye ekugqibeleni imveliso. isixhobo esisikiweyo okanye isixhobo sokujija.Kukho iindlela ezongezelelweyo zenkqubo ye-extrusion eya kuthatha imveliso ekhutshiweyo ngokuthe ngqo kwenye inkqubo ye-in-line yokongeza i-braiding yokuqinisa okanye ukongezwa kwezinye iingubo okanye i-resin layers.
Izinto eziphathekayo
Iindlela zokukhupha zingasetyenziselwa ukucubungula uninzi lwe-thermoplastics kunye nezinye iiplastiki ze-thermoset.I-resins ezixhaphake kakhulu kwi-tube, i-hose kunye neemveliso zepayipi ziquka i-polyethylene ephezulu kunye nephantsi, i-polypropylene, i-polyurethane, i-polystyrene, i-fluoropolymers, i-PTFE, i-polyester, kunye ne-PVC eguquguqukayo kunye neqinile.Uphawu oluhlala luhlula i-resin ezikhutshiweyo kwii-resin ezibunjiweyo ze-injection yi-viscosity enyibilikayo yeplastiki kumaqondo okushisa aqhelekileyo.Iiplastiki ezikhutshiweyo zivame ukuba ne-viscosity ephezulu yokunyibilika, evumela ukuba i-extrudate igcine imilo enikezelwe kuyo ngukufa ngelixa i-extrudate ikwizigaba zokucima.Izongezo ezininzi zinokusetyenziswa ngexesha lenkqubo yokukhupha ukunyusa iimpawu zokusetyenzwa kwepolymer okanye ukuguqula iipropathi zemveliso.Izongezo ezinjalo ziquka i-lubricants, i-thermal stabilizers, i-antioxidants, i-radiopacifying agents, kunye ne-colorants.
Iiparamitha zokuLungiselela
Iiparamitha ezibalulekileyo kwi-extrusion processing ziyafana nezo zeenkqubo zokubumba inaliti.Ubushushu be-resin, uxinzelelo lwe-resin, umxholo wokufuma kwe-resin, isantya se-screw, kunye ne-screw motor amperage zihlala zilawulwa okanye zibekwe esweni ukubonelela ukunyibilika okulinganayo kwireyithi yevolumetric elawulwayo.Ukucima ubushushu kunye nesantya apho i-extrudate itsalwa khona zilawulwa okanye zibekwe esweni ukunika ubungakanani bemveliso elawulwayo.Imilinganiselo yomlinganiselo, kusetyenziswa iindlela ezahlukeneyo zokulinganisa, inokuthatyathwa kwi-extrudate njengoko iveliswa.Ngokwahlukileyo kwisitofu sokubumba, i-extrusion inokutshintsha ubungakanani bemveliso yokugqibela ngaphandle kokutshintsha isixhobo sokufa.Ukunyamezelwa kwemveliso ye-extrusion eqhelekileyo okanye ukuhambelana kwenkqubo kubanjwe ngaphakathi kwe-1% yexabiso elilinganisiweyo.Njengoko ezi nkqubo zokuvelisa zibandakanya iimeko ezizinzileyo, nasiphi na isenzo esinokuzinzisa nayiphi na ipharamitha okanye imeko inenzuzo kwinkqubo.
Ixesha lokuposa: May-09-2017