PET Sheet Extrusion Machine Line

Amaphepha e-PET (i-polyethylene terephthalate), ngokukodwa i-APET (i-amorphous PET) kunye ne-RPET (i-PET ehlaziyiweyo), isetyenziswa ngokubanzi kwiindawo zokupakisha eziphezulu{0}}ezifana neetreyi zokutya, ukupakishwa kwe-blister, ukupakisha izimonyo, njl njl. ubushushu bokusebenza, ukuziphatha kwecrystallization), isixhobo sinoyilo lwaso olulodwa kunye neemfuno.

 

Iimveliso zePET

I-PET sheet rolls

iphepha le-PET elivulekileyo

Iphepha lokupakisha le-PET

Olona phawu lukhulu lwePET lu:

1. I-Hygroscopic ephezulu: Xa izinto eziluhlaza ze-PET zicutshungulwa kumaqondo aphezulu, umswakama unokubangela ukuba i-hydrolyze, ekhokelela ekuqhekekeni kwe-molecular chain, i-brittleness, i-whitening, kunye nokwehla okubukhali kwiipropathi zemishini yeemveliso. Ngoko ke, inkqubo yokomisa yindlela yokuphila yokuvelisa i-PET.

2. Ukuziphatha okucacileyo kwe-crystallization: Ukupholisa ngokukhawuleza kuyadingeka ngexesha lokucubungula ukucinezela i-crystallization kunye nokuvelisa amaphepha e-APET acacileyo kakhulu; Kungenjalo, ukufudumeza kunokukhuthaza ukuqaqamba kwaye kuvelise ubushushu{1}}amaphepha e-CPET anganyangekiyo (afana neetreyi ze-oveni).

I-PET flake crystallizer kunye nenkqubo yokulayishwa okuzenzekelayo

1. Kukho iiseti ezininzi zeeprobes kunye nokulawula iilophu kwi-air inlet kunye nebhokisi yokufudumeza ukuqinisekisa ukhuseleko lokufudumala, i-alamu yokushisa kunye nokukhusela ngokuzenzekelayo (i-2 iiseti zeprobes, iiseti ezi-4 zeesekethe)

2. Lungiselela isakhiwo esishukumisayo ukuqinisekisa ukuba izinto eziphathekayo zixutywe ngokulinganayo kwaye zihamba kakuhle, kwaye izinto eziphathekayo azinayo i-agglomeration.

3. 360-idigri yoyilo lokufakelwa kwe-thermal (kubandakanya ukubuyiswa kwe-air duct) ukuqinisekisa ukusetyenziswa kwamandla obushushu aphezulu

4. Itekhnoloji yolawulo yeLiao Wei yamva nje yokuqinisekisa uzinzo nokhuseleko lukaLiao Wei

 

A PET sheet extrusion umgca wokuvelisa ikakhulu ubandakanya ezi nkqubo zilandelayo:

1. Isixokelelwano sonyango lwemathiriyeli ekrwada - eyona ndawo ibalulekileyo

·Ukukhutshwa kwamanzi kunye nenkqubo yokomisa:

·Isixhobo esingundoqo: sixhotyiswe ubuncinane ngezinto zokukhupha amanzi zamavili eenyosi kunye nezomisi.

·Ukuhamba komsebenzi: Le yinkqubo eqhubekayo. Isomisi sisebenza ngokuqhubekayo ukomisa izinto eziluhlaza ze-PET (ngokuqhelekileyo kwifomu yegranular) kumaqondo okushisa aphezulu (afana ne-150-180℃C) ubuncinane iiyure ze-4-6, ukunciphisa umthamo womswakama ukuya ngaphantsi kwe-50ppm (0.005%) (ngokuqhelekileyo ifuna<30ppm). The other one is used as a backup or regeneration to ensure uninterrupted production.

·Inkqubo yokufunxa ivacuum: Izinto ezomisiweyo ekrwada zifakwa ngqo kwi-extruder hopper ngombhobho wokufunxa ovalwe ngokupheleleyo ukuthintela ukufunxwa ngakumbi kokufuma.

2. Inkqubo ye-Extrusion

· Extruder:

·Single screw exhaust extruder: Olu luqwalaselo olusemgangathweni lwePET sheet production.

· Kutheni uhlobo lokukhupha? Nangona izinto eziluhlaza zomisiwe, inani elincinci leegesi eziguquguqukayo (umswakama, i-oligomers) zisenokwenziwa ngexesha lokunyibilika. I-extruder ephumayo ixhotyiswe ngemingxuma yokukhupha kwaye iqhagamshelwe kwimpompo yokucoca, enokuthi ikhuphe ngamandla ezi gesi ngexesha lenqanaba lokunyibilika, iqinisekisa ukuba imveliso yokugqibela ayinamaqamza kwaye ayinasiphako.

· Uyilo lwe-Screw: Ilungiselelwe ngokukodwa i-viscosity, indawo yokunyibilika, kunye nezinye iimpawu ze-PET, ngokuqhelekileyo kunye ne-L / D ende (i-aspect ratio), njenge-32: 1 okanye ngaphezulu, ukuqinisekisa ukunyibilika okwaneleyo kunye ne-homogenization.

Isihluzo sokunyibilikisa kunye nempompo yegiya (ukhetho kodwa kubalulekile):

·I-Melt filter: Ngokukodwa xa usebenzisa i-RPET (izinto ezihlaziyiweyo), isetyenziselwa ukucoca ukungcola kunye namasuntswana e-carbide kwi-melt.

·Impompo yegiya: ifakwe phakathi kwe-extruder outlet kunye nentloko yokufa, isetyenziselwa ukuseka uxinzelelo oluzinzileyo lokunyibilika, ukuphelisa ukuguquguquka kokuhamba okubangelwa yi-extruder screw pulses, kunye nokuqinisekisa umgangatho ophezulu we-ultra{0}umgangatho ophezulu ofanayo wobukhulu beshiti. Licandelo eliphambili elinokuzikhethela ekuveliseni{2}}imathiriyeli yamaphepha okugqibela.

·Intloko yokungunda:

·Isitayile seHanger T-emilise ukufa: Ngokufana nocingo lwephepha le-PVC, isasaza i-PET etyhidiweyo kwizikhewu zobubanzi obufunwayo kunye nobungqingqwa. Uyilo lwesiteshi kufuneka lulungelelanise neempawu zokunyibilika kwePET. Umlebe wokubumba udla ngokuxhotyiswa ngesixhobo sohlengahlengiso esichanekileyo sebholithi echanekileyo yohlengahlengiso olululo lwe-intanethi ye-lateral yeshiti.

3. Ukubunjwa kunye nenkqubo yokupholisa

·Iikhalenda ezintathu:

·Umsebenzi ongundoqo: Kwi-PET, umsebenzi ophambili wee-roller ezintathu kukupholisa ngokukhawuleza. Ubushushu obuphezulu-(malunga ne-280℃C) i-PET inyibilika iphuma kumngundo kufuneka ipholiswe ngokukhawuleza ngaphantsi kweqondo lobushushu beglasi (Tg) ukucinezela icrystallization kwaye ifumane iishiti ze-APET ezicace kakhulu, ezingenazo iikristale.

·Ulawulo lobushushu berola: Iirola ezintathu zihlala zicwangciswa ngokuthe nkqo okanye kwi-engile ye-45 degree. I-roller ephakathi yi-roller esisigxina, kwaye i-roller ephezulu kunye nesezantsi i-roller adjustable. Kukho amanzi okupholisa ubushushu obuqhubekayo ngaphakathi kwerola, kwaye ulawulo oluchanekileyo lobushushu luyafuneka.

·Impembelelo yobuso: Ukusebenzisa iirola zesipili kunokufumana amashiti agudileyo, ngelixa ukusebenzisa iirola ezineqabaka kunokuvelisa amaphepha e-matte.

4. Ukutsalwa, umlinganiselo wokutyeba kunye nenkqubo yokujija

·Iyunithi yokutsala: yenziwe ngeerola zokupholisa ezininzi kunye neerola zokutsalela irabha, ikhokela ngokutyibilikayo iphepha liphume kumatshini we-roller emithathu kwaye lipholise ngakumbi.

·Igeyiji yobukhulu be-intanethi (i-beta ray okanye i-infrared): Ngexesha lenkqubo yokutsalwa, igeyiji engaqhagamshelwanga yobungakanani boqhagamshelwano iqhubeleka iskena ububanzi obugcweleyo beshiti kwaye inika ingxelo{1}}yexesha lokwenyani kwidatha yobuninzi. Le nkqubo inokudityaniswa nenkqubo yohlengahlengiso lwebholiti yomlomo ukuze kuphunyezwe ulawulo lokutyeba oluzenzekelayo (ATC), ukulawula ukunyamezelwa kobunzima ngaphakathi ± 2-3%.

·Isixhobo sokusika umphetho: Sika imiphetho yenkunkuma engqindilili kumacala omabini ephepha.

· I-Winder: Ukwamkela iziko / umphezulu ojikelezayo okanye uhlobo lwe-turret umatshini wokujija wesikhululo esiphindwe kabini, inkqubo yokulawula uxinzelelo ibalulekile ukuqinisekisa ukuxinana okungaguqukiyo kwekhoyili, ngaphandle kwemibimbi okanye ukolula ukuguqulwa.

5. Inkqubo yokuhlaziya imathiriyeli yomda

·Inkunkuma esikiweyo icunyuzwa ngoko nangoko ibe ngamaqhekeza sisityumzi se-intanethi, ize iphinde ixutywe ngokuqhubekayo kwinkqubo engundoqo yokomisa ngokusebenzisa i-proportional feeder ngomlinganiselo othile (ofana ne-10% -30%), ixutywe nezinto ezintsha, kwaye iphinde isetyenziswe, ukunciphisa kakhulu iindleko.

Uhlobo olukhethekileyo: Umgca wokuvelisa we-CPET

Umgca wemveliso wokushisa{0}}amaphepha e-CPET anganyangekiyo (asetyenziselwa ii-microwave/itreyi ze-oveni) afuna izixhobo ezongezelelweyo zecrystallization.

·Inkqubo: UMnu. uvelisa ii-APET sheets ezicacileyo kwaye zigqithise ngokukhawuleza kwi-oven yokufudumeza icrystallization oven. Iphepha lifudunyezwa kuluhlu lwe-crystallization ye-crystallization ye-PET (~ 160-180℃C), iguqule ukusuka kwi-amorphous state ukuya kwi-crystalline state kwaye ibe yi-opaque / milky white CPET sheet. Ubushushu bayo obukwaziyo ukumelana nobushushu bunokwenyuka kakhulu ukuya kuthi ga kuma-220 degrees C.

·Lo mgca ulingana nokongeza icandelo le-crystallization ekupheleni komgca wokuvelisa we-APET.

·Inkqubo yokomisa iyona nto ingundoqo: kufuneka kutyalwe imali-yomgangatho ophezulu wokuthotywa kwamanzi kunye nenkqubo yokomisa, nto leyo eyimfuneko ekuveliseni amaphepha e-PET afanelekileyo.

·Iimfuno zochaneko oluphezulu: Iimfuno zokufana kobunzima, ukungafihli, kunye nomgangatho womphezulu ziphezulu kakhulu, ngoko ke iimpompo zegiya, iisistim ze-ATC ze-intanethi, njl.

·Uvakalelo lwemathiriyeli ekrwada: Iimfuno eziphezulu zibekwe kumgangatho wezinto ezisetyenziswayo (ingakumbi ukucoceka kunye ne-viscosity ye-RPET) kunye nokuzinza kwendawo yemveliso.

·Ukusetyenziswa kwamandla: Zombini iinkqubo zokomisa kunye ne-extrusion zifuna amaqondo obushushu aphezulu, okukhokelela ekusetyenzisweni okukhulu kwamandla.

Umgca we-PET sheet extrusion line line yeteknoloji eqhubekayo eqhubekayo, kwaye ingundoqo yayo ilele:

1. Ukomisa okokugqibela: I-dehumidification enamandla kunye nenkqubo yokomisa isiseko esipheleleyo sokuqinisekisa umgangatho wemveliso.

2. I-extrusion echanekileyo: I-extruder ephumayo, ipompo yegesi, kunye nokuchaneka kufa kunye kuqinisekisa ukucoceka, ukuzinza, kunye nokufana kokunyibilika.

3. Ukubunjwa okuchanekileyo kunye nolawulo: Inkqubo yokupholisa ngokukhawuleza kwemiqulu emithathu imisela ukungafihli kunye nokusebenza okusisiseko kwephepha, ngelixa umlinganiselo we-intanethi kunye nenkqubo yempendulo ye-automatic (ATC) iqinisekisa ukufana kokugqibela kobukhulu bemveliso.

Ukukhetha umgca we-PET sheet extrusion machine ngokwenene ukhetha inkqubo ezenzekelayo kakhulu enokulawula ngokuchanekileyo ubushushu, uxinzelelo, ukufuma kunye noxinzelelo.

I-PET yimathiriyeli yehygroscopic. Kwimeko yomoya ifunxa ukufuma. Ngexesha lenkqubo ye-extrusion izinto ezifumileyo zixhomekeke kwi-hydrolysis chemical reaction echaphazela iimpawu zomatshini we-foil extruded. Ngenxa yesi sizathu iteknoloji eqhelekileyo idinga ukomisa izinto ezinomgangatho ophezulu wokusetyenziswa kwamandla.

Ukusebenzisa i-COWIN isizukulwana sokugqibela se-twin screw extruders, sinokunceda ukuphepha inkqubo yokomisa kunye nokukhupha izinto ze-PET, zombini iipellets kunye neeflakes. Ukufuma kugcinwa-ngaphandle ngesixhobo sokufunxa esifanelekileyo esifakwe kwi-extruder ukuze kuthintelwe okanye kuncitshiswe iziphumo zenkqubo ye-hydrolysis.

1. Ngesisombululo se-twin screw, ungasusa i-pre{1}}inkqubo yokomisa kunye ne-crystallization system. Oku kuya konga ubuncinci be-30% yamandla.

2. Umgangatho wokugqibela wephepha uyaphuculwa njengoko ukuthotywa kuthintelwa ukuba kwenzeke ngeeyure zaphambi{1}}zekristale kunye naphambi{2}}ixesha lokoma.

3. Nge-COWIN inkqubo ekhethekileyo ye-super vacuum kunye nokucwangciswa kwe-screw ngokufanelekileyo, sinokulawula ukuhla kwe-IV ngaphakathi koluhlu olwamkelekileyo, ngokuqhelekileyo i-0.03 ixhomekeke kumxholo womswakama.

4. Nge-screw twin, ungasebenzisa ngokupheleleyo umthamo we-extruder. Ngelixa i-screw extruder enye inesantya esisezantsi kakhulu sokubaleka, uya kuphulukana namandla amaninzi ukufumana imveliso efanayo.

Iifayile ezishisayo: Umgca womatshini wepet sheet extrusion, China pet sheet extrusion line line abavelisi, ababoneleli, umzi-mveliso