Ngokuyinhloko senza iphaneli yophahla lwe-PVC,amaphaneli odonga, amafreyimu eminyango ye-WPC, amafasitela, imishini yokukhipha ama-trunking.
Njengoba sonke sazi, i-PVC (i-polyvinyl chloride) iyipulasitiki engezwani nokushisa, futhi ukuqina kwayo kokukhanya nakho kubi. Ngaphansi kwesenzo sokushisa nokukhanya, kulula ukusabela kwe-HCl, okuvame ukubizwa ngokuthi ukuwohloka. Umphumela wokuwohloka ukuthi amandla emikhiqizo yepulasitiki ayancipha, ukuguquguquka, kanye nemigqa emnyama ivela, futhi ezimweni ezinzima, imikhiqizo ilahlekelwa inani layo lokusetshenziswa. Izinto ezithinta ukuwohloka kwe-PVC zifaka ukwakheka kwe-polymer, ikhwalithi ye-polymer, uhlelo lokuzinzisa, izinga lokushisa lokubumba nokunye. Ngokusho kokuhlangenwe nakho, ukuphuzi kwamaphrofayili e-PVC kubangelwa kakhulu ukunamathisela endaweni yokufa. Isizathu siwukuthi umzila wokugeleza we-die awunangqondo noma ukupholisha kwendawo esiteshini sokugeleza akukuhle, futhi kukhona indawo yokuma. Umugqa ophuzi wamaphrofayela we-PVC unamathisele kakhulu emgqonyeni womshini. Isizathu esiyinhloko ukuthi kukhona i-angle efile phakathi kwamapuleti e-sieve (noma imikhono yokuguqula), futhi ukugeleza kwezinto ezibonakalayo akubushelelezi. Uma umugqa ophuzi uqonde mpo kuphrofayela ye-PVC, into emile isendleleni ephumayo; uma umugqa ophuzi ungaqondile, ikakhulukazi kumkhono wenguquko. Uma umugqa ophuzi uvela futhi lapho ifomula nezinto zokusetshenziswa zingashintshiwe, isizathu kufanele sitholakale ngokuyinhloko esakhiweni semishini, futhi indawo yokuqala yokubola kufanele itholakale futhi iqedwe. Uma isizathu singatholakali esakhiweni semishini, kufanele kucatshangelwe ukuthi kunenkinga kufomula noma inqubo. Izinyathelo zokugwema ukucekelwa phansi zihlanganisa izici ezilandelayo:
(1) Lawula ngokuqinile izinkomba zobuchwepheshe zezinto ezingavuthiwe, futhi usebenzise izinto zokusetshenziswa ezifanelekayo;
(2) Yakha izimo zenqubo yokubumba enengqondo, lapho izinto ze-PVC zingelula neze ukwehlisa izinga;
(3) Imishini yokubumba kanye nesikhunta kufanele kwakhiwe kahle, futhi ama-engeli afile noma izikhala ezingase zibe khona endaweni yokuxhumana phakathi kwezinto zokusebenza nezinto ezisetshenziswayo kufanele zisuswe; umzila wokugeleza kufanele uqondiswe futhi ulungele ubude; idivayisi yokushisisa kufanele ithuthukiswe, ukuzwela kwedivayisi yokubonisa izinga lokushisa nokusebenza kahle kwesistimu yokupholisa kufanele kuthuthukiswe .
ukugoba deformation
Ukugoba kanye nokuguqulwa kwamaphrofayili e-PVC kuyinkinga evamile enqubweni yokukhipha. Izizathu yilezi: ukukhishwa okungalingani efashini; ukupholisa okunganele kwento ngesikhathi sokupholisa nokubeka, kanye nokuncipha okungaguquki; izinto zokusebenza nezinye izici
Ukugxila kanye nokulingana kwawo wonke umugqa we-extruder yizimfuneko zokuxazulula ukuguquguquka kokugoba kwamaphrofayili e-PVC. Ngakho-ke, ukujula kanye neleveli ye-extruder, die, calibrating die, ithangi lamanzi, njll. kufanele kulungiswe noma nini lapho isikhunta sishintshwa. Phakathi kwazo, ukuqinisekisa ukukhishwa okufanayo kwefa kuyisihluthulelo sokuxazulula ukugoba kwamaphrofayili e-PVC. Ifa kufanele lihlanganiswe ngokucophelela ngaphambi kokuqala umshini, futhi izikhala phakathi kwengxenye ngayinye kufanele zihambisane. Lungisa izinga lokushisa lokufa. Uma ukulungiswa kungavumelekile, izinga le-plasticization yezinto ezibonakalayo kufanele lenyuke ngokufanele. Ukulungiswa kokusiza Ukulungisa idigri ye-vacuum kanye nesistimu yokupholisa yesikhunta sokusetha kuyindlela edingekayo yokuxazulula ukuguqulwa kwamaphrofayili e-PVC. Inani lamanzi okupholisa ohlangothini lwephrofayili elithwala ukucindezeleka kwe-tensile kufanele lenyuke; indlela yesikhungo se-mechanical offset isetshenziselwa ukulungisa, okungukuthi, ukulungisa ngenkathi kukhiqizwa Ama-bolts okumisa phakathi nendawo yokufa yokulinganisa alungiswa ngokuhlehla kancane ngokuya ngokugoba kwephrofayili (ukuqapha kufanele kusetshenziswe uma usebenzisa le ndlela, futhi inani lokulungiswa akufanele libe likhulu kakhulu). Ukunaka ukugcinwa kwesikhunta kuyisinyathelo esihle sokuvimbela. Kufanele uqaphele kakhulu izinga lokusebenza lesikhunta, futhi ugcine futhi ulondoloze isikhunta nganoma yisiphi isikhathi ngokusho kwesimo sangempela.
Ngokuthatha lezi zinyathelo ezingenhla, ukugoba kokugoba kwephrofayili kungaqedwa, futhi i-extruder ingaqinisekiswa ukuthi izokhiqiza amaphrofayili e-PVC ekhwalithi ephezulu ngokuzinza nangokujwayelekile.
Amandla omthelela wezinga lokushisa eliphansi
Izinto ezithinta amandla omthelela wezinga lokushisa eliphansi lamaphrofayili e-PVC zifaka ifomula, isakhiwo sesigaba sephrofayela, isikhunta, izinga lepulasitiki, izimo zokuhlola, njll.
(1) Ifomula
Njengamanje, i-CPE isetshenziswa kabanzi njengesiguquli somthelela. Phakathi kwazo, i-CPE enengxenye enkulu engu-36% ye-chlorine inomphumela ongcono wokuguqula ku-PVC, futhi umthamo ngokuvamile uyizingxenye ezingu-8-12 ngobuningi. I-Elasticity nokuhambisana ne-PVC.
(2) Isakhiwo sesigaba sephrofayela
Amaphrofayili ekhwalithi ephezulu e-PVC anesakhiwo esihle se-cross-sectional. Ngokuvamile, isakhiwo esine-cross-section encane singcono kunesakhiwo esine-cross-section enkulu, futhi isikhundla sokuqiniswa kwangaphakathi ku-cross-section kufanele sibekwe ngendlela efanele. Ukwandisa ugqinsi lombambo lwangaphakathi nokuthatha inguquko eyisiyingi ye-arc ekuxhumekeni phakathi kombambo wangaphakathi nodonga konke kuyasiza ukuthuthukisa amandla omthelela okushisa aphansi.
(3) Isikhunta
Umthelela wesikhunta kumandla womthelela wezinga lokushisa eliphansi ubonakala kakhulu ekuncibilikeni kokuncibilika nokulawula ingcindezi phakathi nokupholisa. Uma iresiphi isinqunyiwe, ingcindezi yokuncibilika ihlobene kakhulu nokufa. Amaphrofayili aphuma ku-die azokhiqiza ukusatshalaliswa kwengcindezi okuhlukile ngezindlela zokupholisa ezihlukene. Amandla womthelela wezinga lokushisa eliphansi lamaphrofayela e-PVC ampofu lapho kugxilwe khona ingcindezi. Lapho amaphrofayili e-PVC epholiswa ngokushesha, athambekele ekucindezelekeni okukhulu. Ngakho-ke, ukuhlelwa komzila wamanzi okupholisa wesikhunta sokulinganisa kubaluleke kakhulu. Izinga lokushisa lamanzi ngokuvamile lilawulwa ku-14°C-16°C. Indlela yokupholisa kancane inenzuzo yokuthuthukisa amandla omthelela wezinga lokushisa eliphansi lamaphrofayela e-PVC.
Ukuze uqinisekise isimo esihle sesikhunta, hlanza idayi njalo ukuze ugweme ukungcola okuvala ukufa ngenxa yokukhiqiza okuqhubekayo kwesikhathi eside, okuholela ekuphumeni okuncishisiwe kanye nezimbambo ezisekelayo ezincane, ezithinta amandla omthelela wezinga lokushisa eliphansi. Ukuhlanza njalo isikhunta sokulinganisa kungaqinisekisa i-vacuum yokulinganisa eyanele kanye nokugeleza kwamanzi kwesikhunta sokulinganisa ukuze kuqinisekiswe ukupholisa okwanele ngesikhathi senqubo yokukhiqiza iphrofayili, ukunciphisa amaphutha nokunciphisa ukucindezeleka kwangaphakathi.
(4) Izinga le-plasticization
Inombolo enkulu yocwaningo nemiphumela yokuhlola ibonisa ukuthi inani elingcono kakhulu lamandla omthelela wezinga lokushisa eliphansi lamaphrofayili e-PVC litholakala lapho i-degree of plasticization ingu-60% -70%. Okuhlangenwe nakho kubonisa ukuthi "ukushisa okuphezulu nesivinini esiphansi" kanye "nokushisa okuphansi nesivinini esikhulu" kungathola izinga elifanayo le-plasticization. Kodwa-ke, izinga lokushisa eliphansi kanye nesivinini esikhulu kufanele kukhethwe ekukhiqizeni, ngoba ukusetshenziswa kwamandla okushisa kungancishiswa ekushiseni okuphansi, futhi ukusebenza kahle kokukhiqiza kungathuthukiswa ngesivinini esikhulu, futhi umphumela wokugunda uyabonakala lapho i-twin-screw extruder ikhishwa. ngesivinini esikhulu.
(5) Izimo zokuhlola
I-GB/T8814-2004 inemithetho eqinile yokuhlolwa komthelela wezinga lokushisa eliphansi, njengobude bephrofayili, isisindo sesando sokudonsa, irediyasi ye-hammerhead, izimo zokuqandisa zesampula, indawo yokuhlola, njll. Ukuze kwenziwe imiphumela yokuhlolwa inembe, imithetho engenhla kufanele ibe kulandelwe ngokuqinile.
Phakathi kwazo: "umthelela wesisindo esiwayo phakathi nendawo yesampula" kufanele uqondwe njengokuthi "ukwenza umthelela wesisindo esiwayo phakathi nendawo yesampula yesampula", umphumela wokuhlola onjalo ungokoqobo.
Izinyathelo zokuthuthukisa ukusebenza komthelela wezinga lokushisa eliphansi zimi kanje:
1. Hlola ngokuqinile ikhwalithi yezinto ezisetshenziswayo, futhi unakisise kakhulu isimo sempahla yokukhishwa kwefa kanye nembobo ye-vacuum. Ukukhishwa kwefa kufanele kube nombala ofanayo, kube ne-gloss ethile, futhi ukukhishwa kufanele kube okufanayo. Kufanele ibe nokunwebeka okuhle lapho uxova ngesandla. Impahla ethekwini le-vacuum yenjini eyinhloko isesimweni "sezinsalela ze-curd kabhontshisi", futhi ayikwazi ukukhipha ukukhanya lapho yenziwe ipulasitiki ekuqaleni. Amapharamitha afana nenjini eyinhloko yamanje kanye nomfutho wekhanda kufanele uzinze.
2.Standardize ukulawulwa kwenqubo ukuqinisekisa umphumela we-plasticizing. Ukulawula izinga lokushisa kufanele kube inqubo "yesitsha". Ukushintsha kwezinga lokushisa lokushisa ukusuka endaweni yokuqala ye-extruder kuya ekhanda kufanele kube uhlobo "lwesitsha". Shintshela "kubhalansi yangaphakathi neyangaphandle" ukuze uqinisekise ukuthi okokusebenza kushisisa ngokulinganayo. Endabeni yefomula efanayo, inqubo ye-extrusion akufanele ishintshwe kakhulu.
Isikhathi sokuthumela: Jun-07-2023
