Plastiki extrusion, joalo ka UPVC (rigid polyvinyl chloride) profiles kapa lihlahisoa tsa liphaephe, haholo-holo e thehoa ka ho kopanya, ho sebetsa ka extrusion, ho bōpa, ho hula, le ho seha resin ea PVC le lisebelisoa tse amanang le eona. Lintlha tse amang ts'ebetso ea lihlahisoa li koahela mohato o mong le o mong ts'ebetsong ea tlhahiso. Mohato o mong le o mong oa sebelisana 'me o ama e mong ka mecha ea phatlalatso ea sehlahisoa. Bothata bo le bong bo ka lefelloa ka mehato e meng ka har'a moeli o itseng, kahoo mohato ka mong o fetoha ntho e phelang. Har'a tsona, lisebelisoa tse tala, lisebelisoa tsa foromo le mekhoa ea ts'ebetso ke lintlha tse ka sehloohong ts'ebetsong ea extrusion ea polasetiki, e amang ka ho toba boleng le tlhahiso ea ho bopa extrusion. Sengoliloeng sena se shebana le phello ea extrusion ho latela pono ea lisebelisoa tsa extrusion le lisebelisoa tse tala.
Ka kakaretso, PVClihlahisoa li sebelisa li-additives tse latelang ho etsa ts'ebetso ea extrusion:
1.PVC resin:
Polyvinyl chloride, e bitsoang PVC ka Senyesemane, ke polasetiki ea boraro e hlahisoang ka ho fetisisa lefatšeng ka bophara (ka mor'a polyethylene le polypropylene). PVC e kile ea e-ba polasetiki e sebelisoang ka ho fetisisa lefatšeng ka bophara 'me e ne e sebelisoa haholo. Ho na le mefuta e 'meli ea PVC: e thata (ka linako tse ling e khutsufatsoa e le RPVC) le e bonolo. Polyvinyl chloride e thata e sebelisoa liphaepheng tsa kaho, mamati le lifensetere. E boetse e sebelisetsoa ho etsa libotlolo tsa polasetiki, liphutheloana, likarete tsa banka kapa tsa botho. Ho eketsa li-plasticizers ho etsa hore PVC e be bonolo le ho feta. E ka sebelisoa liphaepheng, li-cable insulation, fatše, lipontšo, lirekoto tsa keramafono, lihlahisoa tse nang le inflatable le li-substitutes tsa rabara.
stabilizer:
Hobane resin ea PVC ke resin e sa utloeng mocheso, e qala ho theola mocheso ha mocheso o fihla hoo e ka bang 90 ho isa ho 130 ° C, e lokolla HCL e sa tsitsang le ho etsa hore resin e fetohe 'mala o mosehla. Ha mocheso o ntse o phahama, 'mala oa resin o ba lefifi mme thepa ea' mele le ea lik'hemik'hale ea sehlahisoa ea fokotseha. Ntle le ho ntlafatsa ts'ebetso ea tlhahiso ea lisebelisoa tse tala tsa resin, ho rarolla bothata ba ho senyeha ho kenyelletsa ho kenyelletsa li-stabilizer ho resin ea PVC ho monya le ho fokotsa khase ea HCL le ho felisa phello ea eona ea ho senyeha. Mekhoa e tloaelehileng ea ho tsitsisa e kenyelletsa: letsoai la lead, organotin, sesepa sa tšepe le li-stabilizers tse sa tloaelehang tsa lefatše.
Lubricant (PE wax kapa Parafine):
Mofuta o le mong oa tlatsetso ho ntlafatsa lubricity le ho fokotsa khokahano ea sehokelo. Ho ea ka mesebetsi, li arotsoe ka lisebelisoa tsa ka ntle, tse ka hare le tse ka hare le tsa ka ntle. Lubricant e kantle e ka fokotsa likhohlano lipakeng tsa thepa le bokaholimo ba tšepe ho thibela thepa ea UPVC ho khomarela moqomo le ho screw ka mor'a polasetiki. Lubricant e ka hare e ka fokotsa likhohlano pakeng tsa likaroloana tse ka hare ho thepa, ea fokolisa momahano pakeng tsa limolek'hule le ho fokotsa viscosity e qhibilihisang. Tšebeliso ea mafura e na le phello e kholo ho fokotsa boima ba screw load, ho fokotsa mocheso oa ho kuta, le ho eketsa tlhahiso ea extrusion. Sebopeho sa lubricant ha se etsoa ke sa bohlokoa haholo.
Lisebelisoa tsa ho tlatsa:
E le ho ntlafatsa ho thatafala le ho tiea ha lihlahisoa, ho fokotsa ho senyeha ha lihlahisoa, le ho fokotsa litšenyehelo tsa thepa e tala, li-fillers tse kang CaCO 3 hangata li eketsoa tlhahiso ea lihlahisoa tsa UPVC.
Sesebelisoa sa ho lokisa (ACR):
Morero o ka sehloohong ke ho ntlafatsa ts'ebetso ea lisebelisoa, ho potlakisa polasetiki ea resin ea PVC, le ho ntlafatsa mokelikeli, deformation ea mocheso le khanya ea lihlahisoa.
Phetoho ea tšusumetso:
Morero o ka sehloohong ke ho ntlafatsa ho hanyetsa ha lihlahisoa, ho ntlafatsa ho tiea ha lihlahisoa, le ho ntlafatsa phello ea polasetiki. Liphetoho tse sebelisoang ka tloaelo bakeng sa UPVC ke CPE (chlorinated polyethylene) le acrylate impact modification.
Mochine oa polasetiki oa lisebelisoa tsa polasetiki tsa extrusion le tšusumetso ea metsoako ea foromo ho eona:
Ho na le lisebelisoa tse ngata bakeng sa ho bopa extrusion ea polasetiki. Tse ka sehloohong tse sebelisetsoang ho hlahisa lihlahisoa tse thata tsa UPVC ke li-extruder tse pota-potileng mafahlaconical twin screw extruder. Se latelang se bua haholo ka mochini oa polasetiki oa li-extruder tse sebelisoang hangata bakeng sa ho hlahisa lihlahisoa tsa UPVC.
Mochini o potolohang oa conical twin-screw extruder:
Nako ea poso: Dec-29-2023
