I-Plastic extrusion yinkqubo yokuvelisa umthamo ophezulu apho iplastiki eluhlaza inyibilika kwaye yenziwe ibe yiprofayili eqhubekayo.I-Extrusion ivelisa izinto ezinje ngombhobho/iityhubhu, ukubetha kwemozulu, ukubiyela, iintsimbi zomngangatho, iifreyimu zefestile, iifilim zeplastiki kunye ne-sheeting, i-thermoplastic coatings, kunye nokugquma ucingo.
Uyilo lweScrew:
Uyilo lwe-screw lubalulekile ekusebenzeni kweplastiki.Ikakhulu inemisebenzi emithathu eyahlukeneyo: eyile, indlela yokutya;ukunyibilika okufanayo kunye nokuxutywa kweplastiki kwaye ekugqibeleni kuvelisa uxinzelelo lokutyhala into etyhidiweyo ngokufa.Ubude be-screw (L) bubhekiselwa kububanzi bayo (D) njengomlinganiselo we-L / D.Ngokubanzi, umlinganiselo we-L/D usetyenziswa njenge-24:1, kodwa ukuxuba ngakumbi kunye nemveliso, inokunyuka ukuya kuma-32:1.Kukho iizowuni ezintathu ezinokwenzeka kubude bezikrufu oko kukuthi indawo yefidi, indawo yokunyibilika, kunye nendawo yemitha.(a) Indawo yesondlo: Kulo mmandla, iresin ifakwa ukusuka kwihopper ukuya kumbhobho, kwaye ubunzulu bejelo bungatshintshi.(b) Indawo yokunyibilika: Izinto zeplastiki ziyanyibilika kwaye ubunzulu betshaneli buba buncinci ngokuqhubekayo.Ikwabizwa ngokuba yindawo yotshintsho okanye yoxinzelelo.(c) Indawo yokulinganisa: Iplastiki etyhidiweyo ixutywa kubushushu obufanayo kunye noxinzelelo kwaye idluliselwe kwidayizi.Ubunzulu betshaneli buhlala buhleli kulo mmandla wonke.
Iintlobo zeNkqubo ye-Extrusion
Inkqubo ye-extrusion ihlelwa ngokubanzi kwiintlobo ezisixhenxe ezahlukeneyo ngokuxhomekeke kwizicelo ezithile.(a)Ishiti / iFilimu ExtrusionKule nkqubo ye-extrusion, imathiriyeli yeplastiki etyhidiweyo ikhutshwa ngokufa kweflethi.Imiqulu yokupholisa isetyenziselwa ukumisela ubukhulu beshiti / ifilimu kunye nokwakheka kwayo komphezulu.Ubunzima bephepha bunokufumaneka kwi-0.2 ukuya kwi-15 mm.Icwecwe elicekethekileyo elisicaba okanye ifilimu yezinto zeplastiki zingenziwa.Ngokubanzi, iplastiki yepolystyrene isetyenziswa njengento ekrwada kwinkqubo yokukhutshwa kwamaphepha.(b)Ifilimu evuthelweyo ExtrusionKwinkqubo yefilimu evuthelweyo, ukufa kufana ne-cylinder ethe nkqo eneprofayili yesetyhula.Iplastiki etyhidiweyo itsalwa phezulu ukusuka kwidayiri ngeperi ye nip rollers.Umoya ocinezelweyo usetyenziselwa ukufunxa ityhubhu.Ukujikeleza idiyizi, i-air-ring ifakwe.Injongo yeringi yomoya kukupholisa ifilimu njengoko ihambela phezulu.Embindini wokufa, kukho i-inlet yomoya apho umoya ocinezelweyo unokunyanzeliswa kumbindi weprofayili yesetyhula, kwaye wenze i-bubble.Icandelo eligqithisiweyo lesetyhula linokunyuswa ngamaxesha angama-2-3 obubanzi bokufa.Amaqamza adilikile ngoncedo lwepleyiti yokuwa.I-nip rolls yenza iqamza libe ngumaleko ophindwe kabini wefilimu ebizwa ngokuba yi-layflat.Ubunzima bodonga lwefilimu bunokulawulwa ngokutshintsha isantya se-nip rollers.I-layflat inokuchithwa ngendlela yomqulu okanye inqunywe kwiimilo ezifunwayo.Icala elisezantsi le-layflat litywinwe ngokusetyenziswa kobushushu, kwaye linqunyulwe ngapha nangapha ukuya kwifomu yokuvula;kungoko ingasetyenziselwa ukwenza ingxowa yeplastiki.Ububanzi bokufa bunokwahluka kwi-1 ukuya kwi-300 centimeters. Ngokuqhelekileyo, iplastiki ye-polyurethane isetyenziswe kule nkqubo.
(c)Ngaphezulu kweJacketing Extrusion
Oku kukwabizwa ngokuba yinkqubo yokugquma ucingo.Kule nkqubo, ucingo olungenanto lutsalwa embindini wedayisi.Kukho iintlobo ezimbini ezahlukeneyo zezixhobo ze-extrusion ezisetyenziselwa ukugquma phezu kwe-iepressure yocingo okanye i-jacketing tooling.Ukuba unxibelelwano olusondeleyo okanye ukunamathela kuyafuneka phakathi kocingo kunye neengubo, isixhobo soxinzelelo siyasetyenziswa.Ukuba ukunamathela akufunwa, i-jacketing tooling isetyenziswa.Ukuze isixhobo soxinzelelo, ucingo luhlehliswa ngaphakathi kwifa, apho ludibana neplastiki etyhidiweyo kuxinzelelo oluphezulu kakhulu.Kwizixhobo zejacket, ucingo luya kwandiswa kwaye iplastiki etyhidiweyo iya kwenza isigqubuthelo kwintambo emva kokufa.Ucingo olungenanto lutyiswa ngedayizi kwaye aludibani ngqo neplastiki etyhidiweyo de luyishiye idayizi.Umehluko omkhulu phakathi kwejacket kunye nesixhobo soxinzelelo yindawo yocingo ngokumalunga nokufa.
(d)I-Tubing ExtrusionKule nkqubo, iplastiki etyhidiweyo extruded ngokusebenzisa kufa kunye amacandelo umnqamlezo umgongxo akhiwa ngokubeka mandrel ngaphakathi die.Ityhubhu enemingxuma ezininzi nazo zisenokwenziwa kwizicelo ezithile, ngokubeka inani le mandrels embindini wokufa.(e)I-CoextrusionI-Coextrusion yinkqubo ye-extrusion yokwenza iileya ezininzi zezinto ngexesha elinye.Isetyenziselwa ukusebenzisa umaleko omnye okanye ngaphezulu ngaphezulu kwezinto ezisisiseko ukufumana iipropati ezithile ezifana nokufunxa i-ultraviolet, i-grip, i-matte surface, kunye ne-energy reflection, ngelixa i-base material ifaneleka ngakumbi kwezinye izicelo, umz. ukuxhathisa impembelelo kunye nokusebenza kwesakhiwo.Isenokusetyenziswa kuyo nayiphi na inkqubo efana nefilimu evuthelweyo, i-overjacketing, iityhubhu, iphepha/ifilimu extrusion.Kule nkqubo, ii-extruders ezimbini okanye ngaphezulu zisetyenziselwa ukuhambisa izinto ezidityanisiweyo zibe yifa enye ekhupha izinto kwimilo efunekayo.Ubukhulu bomaleko bulawulwa sisantya kunye nobukhulu be-extruders nganye ehambisa izinto.(f)Extrusion CoatingI-extrusion coating isetyenziselwa ukwenza uluhlu olongezelelweyo kwi-rollstock ekhoyo yephepha, i-foil okanye ifilimu.Ngokomzekelo, ukuphucula ukuchasana kwamanzi kwephepha le-polyethylene lisetyenziswa.Ukusetyenziswa kwe-extrusion coating kukupakishwa kolwelo, iphepha lokufota, iimvulophu, ukufakwa kweengxowa zokufaka izichumisi kunye nokupakishwa kwezonyango.Ngokuqhelekileyo, i-polyethylene kunye ne-polypropylene zisetyenziswa.
Ixesha lokuposa: Oct-01-2018