Screw ke karolo ea bohlokoa ka ho fetisisa eaextruder, ho ka boleloa hore ke pelo ea extruder, e ka ama ka ho toba ho sebelisoa ha extruder le katleho ea tlhahiso.Ts'ebetso ea screw e khetholla tlhahiso, boleng ba polasetiki, ho hasana ha li-filler, mocheso o qhibilihang le tšebeliso ea matla ea extruder.
Screw ke karolo ea bohlokoa ka ho fetisisa ea extruder, ho ka boleloa hore ke pelo ea extruder, e ka ama ka ho toba ho sebelisoa ha extruder le katleho ea tlhahiso.Ts'ebetso ea screw e khetholla tlhahiso, boleng ba polasetiki, ho hasana ha li-filler, mocheso o qhibilihang le tšebeliso ea matla ea extruder.Ka ho potoloha ha screw, thepolasetiki ea polymer e ka fetisoa, 'me polasetiki e ka sisinyeha, ea hatella le ho fumana mocheso o itseng ka lebaka la khohlano ea silindara.Nakong ea ho sisinyeha ha cylinder, polasetiki e ka kopanngoa le polasetiki.
- 1.Sebopeho sa screw ea polymer plasticizing le ho kopanya extruder.
Nakong ea ts'ebetso, ha thepa e ea pele ka screw, e ba le liphetoho tsa mocheso, khatello, viscosity, joalo-joalo, tse fapaneng ka har'a bolelele bo feletseng ba screw.Ho na le maemo a mararo a 'mele a polasetiki ea polymer ho extruder: boemo ba khalase, boemo bo phahameng ba elastic le boemo ba phallo ea viscous.E le ho ikamahanya le litlhoko tsa linaha tse fapaneng le ho ea ka litšobotsi tse fetohang tsa thepa, screw e ka aroloa likarolo tse tharo: karolo ea fepa, karolo ea compress le karolo ea homogenize.Mosebetsi oa karolo ea ho fepa ke ho fepa thepa e fanoang ke hopper ho karolo ea compression.Nakong ea ho tsamaea ha polasetiki, ka kakaretso e lula e le boemo bo tiileng 'me karolo e itseng e qhibiliha ka lebaka la mocheso.Bolelele ba karolo ea ho fepa bo fapana ho ea ka mofuta oa polasetiki.Karolo ea khatello (karolo ea phetisetso) ke karolo ea khatello ea lintho tse bonahalang, e le hore thepa e tsoang ho tiileng e be e qhibilihisitsoeng, e tsoe moeeng ka thepa;E le hore u ikamahanye le litšoaneleho tsa ho fokotsa molumo ha u sutumelletsa khase ka thepa ho khutlela karolong ea ho fepa, ho hatella thepa le ho qhibiliha lintho tse bonahalang, sekoti se karolong ena se lokela ho hlahisa phello e kholo ea ho kuta le ho hatella polasetiki.Mosebetsi oa karolo ea homogenizing (karolo ea metering) ke ho fepa thepa e qhibilihisitsoeng ho hlooho ea mochine ka molumo o sa khaotseng (bolumo) le khatello e le hore e thehoe ka har'a hlobo ea molomo.Molumo oa spiral groove karolong ea homogenizing o tšoana le o karolong ea ho fepa.
E le ho qoba ho boloka lintho tse bonahalang qetellong ea screw hlooho shoeleng sekhutlo, ho baka ho bola, screw head hangata etselitsoe ka khoune kapa semicircle;Karolo e 'ngoe ea li-screw homogenization ke - bokaholimo bo boreleli ka botlalo bo bitsoang hlooho ea torpedo, empa ho boetse ho na le li-grooves tse betliloeng kapa lipaterone tsa ho sila.Hlooho ea torpedo e na le mosebetsi oa ho susumetsa le ho laola thepa, ho felisa ts'ebetso ea pulsating (pulsating) phallo, ho fokotsa botenya ba lera la thepa ka ho eketsa khatello ea thepa, ho ntlafatsa boemo ba ho futhumatsa, le ho ntlafatsa ts'ebetso ea "screw plasticizing" le ho feta. .Ho ea ka khopolo ea ho qhibiliha ha lipalangoang, melt e phalla karolong ea "screw homogenization" ka mefuta e mene, 'me ho phalla ha thepa e qhibilihisitsoeng ka har'a screw groove ke motsoako oa phallo tsena tse' nè: phallo e ntle - polasetiki e qhibiliha e phalla pakeng tsa cylinder le screw ho ea ka tsela. ea "screw groove" e lebisang hloohong ea mochini.Tataiso ea phallo ea li-counter-current e fapane le phallo e ntle, e bakoang ke khatello ea khatello e bakoang ke ho hanyetsa nko, poleiti ea porous le poleiti ea filthara.Phallo ea ho qhibiliha ka tataiso ea perpendicular ho lerako la khoele e ama ho kopanya le phapanyetsano ea mocheso oa ho qhibiliha nakong ea extrusion.Phallo ea ho lutla - phallo e khutlelang morao e entsoeng ke sekhahla sa khatello pakeng tsa screw le silinda, haufi le tataiso ea axial ea screw.Mefuta e fapaneng ea phallo e na le litlamorao tsa bohlokoa ho kopantseng ho ts'oana ha li-polymers.
Screw bophara le boikemisetso ba sebopeho sa sebopeho, haholo-holo ho latela tlhahiso ea sehlahisoa, litlhaloso, mefuta ea lisebelisoa tse sebetsitsoeng le litšobotsi tse fapaneng tsa sebopeho sa screw ho tseba.Ka kakaretso, karolo ea phepelo ea screw e na le groove e tebileng mme botebo ba groove ha bo fetohe, karolo ea khatello (karolo e qhibilihisitsoeng) ea botebo ba "screw groove" ho latela tataiso ea ho tsoa ho tloha botebong ho ea ho bolibeng, karolo ea metering (karolo e homogenized) ea screw. e na le groove e sa tebang le botebo ba groove ha bo fetohe.
- 2. Thepa ea screw.
Screw ke karolo ea bohlokoa ea extruder, kaha thepa ea screw e tlameha ho ba le mocheso o phahameng oa ho hanyetsa, ho hanyetsa ho roala, ho hanyetsa kutu, matla a phahameng le litšobotsi tse ling, ka nako e ts'oanang e lokela ho ba le ts'ebetso e ntle ea ho itšeha, khatello ea mocheso ea masala a mocheso, deformation e nyenyane ea mocheso. litšobotsi tse ling.Bakeng sa lisebelisoa tsa extruder screw, ho na le litlhoko tse khethehileng tse latelang:
- (1).Thepa e phahameng ea mochini.Ho ba le matla a lekaneng, ho ikamahanya le mocheso o phahameng, maemo a sebetsang a khatello e phahameng, ho ntlafatsa bophelo ba tšebeletso ea screw.
- (2).Tsebetso e ntle ea machining.Ts'ebetso e ntle ea machining le ts'ebetso ea kalafo ea mocheso.
- (3) .Go corrosion e ntle le ho roala ho hanyetsa.
- (4).Ho bonolo ho taka.
Nako ea poso: Jul-15-2019