Ukukhutshwa kweplastiki, okufana neeprofayili ze-UPVC (i-polyvinyl chloride eqinile) okanye iimveliso zemibhobho, ubukhulu becala zenziwe ngokuxuba, ukusetyenzwa kwe-extrusion, ukubunjwa, ukukhupha, kunye nokusikwa kwe-PVC ye-resin kunye nezongezelelo ezinxulumene nazo. Izinto ezichaphazela ukusebenza kweemveliso zigubungela inyathelo ngalinye kwinkqubo yokuvelisa. Inyathelo ngalinye lisebenzisana kwaye lichaphazela omnye nomnye ngokusebenzisa imidiya yemveliso. Ingxaki enye inokubuyekezwa ngamanye amanyathelo phakathi koluhlu oluthile, ngoko inyathelo ngalinye liba yinto ephilayo. Phakathi kwazo, izixhobo eziluhlaza, izixhobo zefomula kunye nobuchule bokusebenza zizona zinto ziphambili kwinkqubo yeplastiki ye-extrusion, echaphazela ngokuthe ngqo umgangatho kunye nemveliso ye-extrusion molding. Eli nqaku lijolise kwimpembelelo kwi-extrusion kwimbono yezixhobo ze-extrusion kunye nezinto eziluhlaza.
Ngokubanzi, PVCiimveliso zisebenzisa ezi zongezo zilandelayo ukwenza inkqubo extrusion:
1.PVC intlaka:
I-Polyvinyl chloride, ekubhekiselwa kuyo njenge-PVC ngesiNgesi, yeyesithathu ukuveliswa kweplastiki yepolymer yokwenziwa ehlabathini (emva kwepolyethylene kunye ne-polypropylene). I-PVC yayikhe yaba yeyona plastiki yaveliswa ngokubanzi-injongo yehlabathi kwaye yayisetyenziswa ngokubanzi. Kukho iindidi ezimbini zePVC: eziqinileyo (ngamanye amaxesha zifinyezwa njenge RPVC) kwaye zithambile. I-polyvinyl chloride eqinile isetyenziswa kwimibhobho yokwakha, iingcango kunye neefestile. Ikwasetyenziselwa ukwenza iibhotile zeplastiki, ukupakishwa, amakhadi ebhanki okanye ubulungu. Ukongeza iiplasticizers kwenza iPVC ibe thambileyo kwaye ilastiki ngakumbi. Ingasetyenziswa kwimibhobho, ukugquma kwentambo, umgangatho, imiqondiso, iirekhodi zegramafoni, iimveliso ezinokuvutheka kunye nezinto ezithatha indawo yerabha.
isizinzi:
Ngenxa yokuba i-resin ye-PVC i-resin evakalelwa ngubushushu, iqala ukuthotywa kwe-thermal xa ubushushu bufikelela malunga ne-90 ukuya kwi-130 ° C, ikhupha i-HCL engazinzanga kwaye ibangela ukuba i-resin iguqule umbala ophuzi. Njengoko iqondo lobushushu linyuka, umbala we-resin uba mnyama kwaye iimpawu zomzimba kunye neekhemikhali zemveliso ziyehla. Ukongeza ekuphuculeni inkqubo yemveliso ye-resin ekrwada, ukusombulula ingxaki yokuthotywa ikakhulu kubandakanya ukongeza izizinzi kwi-PVC resin ukuze ifunxe kwaye ingathathi hlangothi igesi ye-HCL kunye nokuphelisa isiphumo sayo sokuthotywa kwe-catalytic. Iinkqubo zokuzinzisa ezisetyenziswa ngokuqhelekileyo ziquka: iityuwa ezikhokelayo, i-organotin, iisepha zentsimbi kunye nezinzinzisi zomhlaba ezinqabileyo.
Isithambiso(i-PE wax okanye iParafini):
Olunye uhlobo lokongeza ukuphucula i-lubricity kunye nokunciphisa i-adhesion interface. Ngokwemisebenzi, zohlulwe zibe zizithambiso zangaphandle, izithambiso zangaphakathi kunye nezithambisi zangaphakathi nangaphandle. I-lubricant yangaphandle inokunciphisa ukungqubuzana phakathi kwezinto kunye nomgangatho wetsimbi ukukhusela izinto ze-UPVC ekubambeleleni kwi-barrel kunye ne-screw emva kweplastiki. I-lubricant yangaphakathi inokunciphisa ukungqubuzana phakathi kweengqungquthela ngaphakathi kwezinto, yenza buthathaka ukudibanisa phakathi kwama-molecule kunye nokunciphisa i-viscosity encibilikayo. Ukusetyenziswa kwezithambiso kunempembelelo ebalulekileyo ekunciphiseni umthwalo we-screw, ukunciphisa ubushushu be-chear, kunye nokunyusa ukuphuma kwe-extrusion. Uyilo lwe-lubricant ekuqulunqweni lubaluleke kakhulu.
Izinto zokuzalisa:
Ukuze kuphuculwe ubulukhuni kunye nokuqina kweemveliso, ukunciphisa ukuguqulwa kwemveliso, kunye nokunciphisa iindleko zezinto ezibonakalayo, iifayili ezifana neCaCO 3 zihlala zongezwa kwimveliso yeemveliso ze-UPVC.
Ukulungiswa Kwesilungisi (ACR):
Eyona njongo iphambili kukuphucula ukusebenza kwemathiriyeli, ukukhawulezisa iplastikhi yePVC resin, kunye nokuphucula ulwelo, ukuguqulwa kwe-thermal kunye neglosi yemveliso.
Isilungisi sempembelelo:
Injongo ephambili kukuphucula ukuxhathisa impembelelo yeemveliso, ukuphucula ukuqina kweemveliso, kunye nokuphucula impembelelo yeplastiki. Izilungisi ezisetyenziswa ngokuqhelekileyo kwi-UPVC yi-CPE (i-polyethylene eklorini) kunye nokuguqulwa kwempembelelo ye-acrylate.
Indlela yokwenza iplastikhi yezixhobo zeplastiki ze-extrusion kunye nefuthe lezithako zefomula kuyo:
Kukho izixhobo ezininzi zokubumba iplastiki ye-extrusion. Ezona zisetyenziselwa ukukhupha iimveliso ezinzima ze-UPVC zi-counter-roating twin-screw extrudersi-conical twin screw extruder. Oku kulandelayo kuxoxa ikakhulu ngomatshini wePlasitiki yee-extruders ezisetyenziswa ngokuqhelekileyo ukukhutshwa kweemveliso ze-UPVC.
I-counter-rotating conical twin-screw extruder:
Ixesha lokuposa: Dec-29-2023
