I-Polyurethane Rubber yokusakaza
Irabha yokuphonswa kwe-polyurethane iyindlela edumile esetshenziswa abakhiqizi ukuze bakhe imikhiqizo ehlala isikhathi eside futhi eguquguqukayo. Inqubo ihilela ukuxuba izingxenye ezimbili zoketshezi, i-polyol ne-isocyanate, ndawonye ngezilinganiso ezifanele. Le ngxube ibe isithelwa esikhunjeni noma emgodini lapho izoqina futhi ilaphe ngokuhamba kwesikhathi.
Ukuqinisekisa ukulingisa okuyimpumelelo, kubalulekile ukulandela izinyathelo zokuphepha ezifanele njengokugqoka amagilavu okuvikela nezingubo zamehlo, ukusebenza endaweni enomoya omuhle, nokulandela imihlahlandlela yomkhiqizi yokuphatha amakhemikhali. Isikhunta kufanele futhi silungiswe ngokusebenzisa i-ejenti yokukhulula ukuvimbela irabha ephulukisiwe ukuthi inganamatheli phezulu.
Uma sekuthelwe esikhunjeni, ingxube izoqala ukwanda kancane njengoba ilapha. Ngemva kwamahora ambalwa noma izinsuku kuye ngezidingo zomkhiqizo, irabha ekhonjiwe ingasuswa esikhunjeni futhi iqedwe ngezinyathelo ezengeziwe ezifana nokuphungula okubalulekile okudlulele noma ukwengeza ukuthungwa. Sekukonke, irabha ephonswa nge-polyurethane inikeza abakhiqizi indlela ephumelelayo yokukhiqiza imikhiqizo yekhwalithi ephezulu enamazinga ahlukene obulukhuni nokuguquguquka kwezinhlobonhlobo zezimboni ezihlanganisa izingxenye zezimoto, izimpahla zabathengi, kanye nemishini yezokwelapha.
Uma uthola i- inkampani yesevisi ye-polyurethane, Ngiyacela Xhumana nathi zizwe ukhululekile.
Izinsiza Nezinto
Uma kukhulunywa ngokuphonsa irabha ye-polyurethane, izinto zokwakha nezinto ozisebenzisayo zibalulekile ukuze uzuze umphumela oyimpumelelo. Okokuqala futhi okubaluleke kakhulu, uzodinga isikhunta esenziwe nge-silicone noma enye impahla efanele ukuze ubambe i-polyurethane ewuketshezi. Ukwengeza, uzodinga ama-ejenti okukhululwa afana ne-petroleum jelly noma izixazululo ze-spray-on ezivimbela irabha ephulukisiwe ukuthi inganamatheli esikhunjeni.
Ukunikezwa okulandelayo okubalulekile yi-polyurethane ngokwayo, evame ukuza ezingxenyeni ezimbili: i-resin ne-hardener. Kubalulekile ukukala lezi zingxenye ngokunembile ukuze uthole isikhathi sokwelapha esiphelele namandla omkhiqizo wokugcina. Ngokuya ngobulukhuni obufisayo noma izinga lokuguquguquka, ungakhetha ezinhlotsheni ezahlukene ze-polyurethane enezilinganiso ezihlukene ze-resin-to-hardener.
Ezinye izinto ezibalulekile zihlanganisa izinkomishi zokuxuba, izinti ezinyakazayo, amagilavu, nezibuko zokuphepha njengoba ukuphatha i-polyurethane ewuketshezi kudinga ukunakwa ngokucophelela ukuze kugwenywe ukucasuka kwesikhumba noma ukulimala kwamehlo. Uma zonke lezi zinto sezitholakala futhi zisethwe kahle ngokwemiyalelo yomkhiqizi, sekuyisikhathi sokuqala ukusakaza!
Ukulungisa Isikhunta
Ngaphambi kokuphonsa irabha ye-polyurethane, ukulungisa isikhunta kuyisinyathelo esibalulekile esingeke seqiwe. Okokuqala, isikhunta kufanele sihlanzeke futhi singabi nadoti noma ukungcola. Lokhu kungafezwa ngokuxubha ubuso besikhunta ngebhulashi eline-soft-bristled ukususa noma yiziphi izinhlayiya ezixekethile.
Okulandelayo, kubalulekile ukusebenzisa i-ejenti yokukhulula endaweni yesikhunta. I-ejenti yokukhulula izovimbela irabha ye-polyurethane ukuthi inganamatheli esibunjeni futhi iqinisekise ukukhululwa okushelelayo uma seselaphekile. Kunezinhlobo ezahlukene zama-ejenti okukhipha atholakalayo emakethe, njengezifutho noma uketshezi, futhi ukukhetha okukodwa kuncike ezintweni ezihlukahlukene njengohlobo lwe-resin nesikhathi sokwelapha.
Okokugcina, kunconywa ukuthi wengeze iziteshi zokungenisa umoya ezindaweni lapho amaphakethe omoya angakha khona ngesikhathi sokwelapha. Lawa mashaneli avumela umoya ovaleleke ukuba uphume ngesikhathi sokusakaza futhi avimbele amaphutha emkhiqizweni wokugcina. Amashaneli okungenisa umoya angadalwa ngokubhoboza izimbobo ezincane ezindaweni lapho umoya ungase uvaleleke khona, njengamakhona noma izindawo eziqinile.
Sekukonke, ukulungisa kahle isikhunta sakho ngaphambi kokuphonsa irabha ye-polyurethane kubalulekile ukuze uthole imiphumela yekhwalithi ephezulu kanye nokuqinisekisa ukuthi isikhunta sakho sihlala isikhathi eside ngaphandle kokulimala.
Hlanganisa i-Rubber Compound
Ukuze uphonsa irabha ye-polyurethane, umuntu udinga ukuxuba inhlanganisela yoketshezi enezingxenye ezimbili. Ingxenye yokuqala yi-polyol noma i-resin, ehlinzeka ngomgogodla we-polymer. Ingxenye yesibili i-isocyanate noma i-hardener esabela ne-polyol ukuze yakhe i-polymer eqinile. Ukuxuba lezi zingxenye ezimbili ndawonye kuqala ukusabela kwamakhemikhali okuguqula ingxube yoketshezi ibe into enwebekayo futhi eqinile.
Inqubo yokuxuba kufanele icace njengoba inquma izici zomkhiqizo wokugcina. Ukuxuba okunganele kungase kushiye amaphakethe angaxutshiwe ekulingiseni kwakho kokugcina, okubangela ukungqubuzana kokuqina, umbala, nokuthungwa. Kungase futhi kubangele ukuguga ngaphambi kwesikhathi kanye nokudabuka kwemishini ngenxa yokusatshalaliswa okungalingani kwengcindezi kukho konke ukusakaza kwakho.
Ukuze uthole imiphumela emihle kakhulu ngesikhathi sokuxuba, kubalulekile ukusebenzisa izilinganiso ezinembile kuzo zombili izingxenye zenhlanganisela yakho, landela imiyalelo yomkhiqizi eduze futhi usebenzise okokusebenza okufanele kokuphepha njengamagilavu, izibuko kanye nezinsimbi zokuphefumula lapho ubamba lawa makhemikhali. Uma usuwaxube kahle ama-compounds akho, uwathele ezibunjeni ezikhethiwe ngokushesha ngaphambi kokuba aqale ukuphulukisa noma ukuqina - lokhu kuqinisekisa ukufana kuwo wonke ama-cast akho.
Ukuthulula & Ukwelapha
Ukuthela kanye nokwelapha kuyizinyathelo ezibalulekile ekubumbeni irabha ye-polyurethane. Ngaphambi kokuqala inqubo, kubalulekile ukulungisa isikhunta ngokuhlanza nokusebenzisa i-ejenti yokukhulula. Uma isikhunta sesilungile, sekuyisikhathi sokuxuba irabha ye-polyurethane ngokwemiyalelo yomkhiqizi. Isilinganiso sezingxenye A no-B kufanele sicace ukuze kuqinisekiswe ukwelashwa okufanele.
Okulandelayo, kancane kancane uthele irabha ehlanganisiwe ye-polyurethane esikhunjini. Kubalulekile ukugwema ukwethula amabhamuza omoya phakathi nalesi sinyathelo ngokuthela kancane futhi usebenzise umfudlana omncane wengxube. Ngemva kokuthela, thepha ngobumnene noma dlidliza isikhunta ukuze usize noma imaphi amabhamuza omoya asele akhuphukele phezulu.
Inqubo yokwelapha ingathatha noma yikuphi ukusuka emahoreni ambalwa kuya ezinsukwini ezimbalwa kuye ngezici ezifana nezinga lokushisa, umswakama, nokushuba kwe-cast. Kubalulekile ukuthi ungaphazamisi noma ungakhiphi ukusakaza kuze kube yilapho sekuphuluke ngokuphelele njengoba ukususwa ngaphambi kwesikhathi kungase kubangele ukonakala noma ukuklebhuka kwento. Uma usulaphe ngokugcwele, susa ngokucophelela into yakho entsha yenjoloba ye-polyurethane esibunjeni sayo ukuze uyisebenzise noma uqedele ukuthinta.
Ukuqeda kuthintwa
Ngemva kokuthela ingxube ye-polyurethane esibunjeni, yisikhathi sokugxila ekuthinteni okuzokwenza umkhiqizo wakho wokugcina ukhanye. Esinye sezinyathelo ezibaluleke kakhulu ukususa ngokucophelela noma yimaphi amabhamuza omoya okungenzeka akheke ngesikhathi sokuphonsa. Lokhu kungenziwa ngokuthepha ngobumnene noma ukudlidliza isikhunta ukuze ukhuthaze noma yimaphi amabhamuza omoya avaleleke ukuba akhuphukele phezulu futhi aqhume.
Uma usuqinisekise ukuthi wonke amabhamuza omoya asusiwe, sekuyisikhathi sokuthi uvumele ukwelashwa kwenjoloba ye-polyurethane. Inqubo yokwelapha ngokuvamile ithatha amahora ambalwa futhi akufanele isheshe. Kubalulekile ukuthi uvumele i-cast yakho ihlale ingaphazanyiswa ize ilulaphe ngokugcwele ngaphambi kokuzama ukuyisusa esibunjeni.
Okokugcina, uma i-cast yakho isilaphe ngokugcwele, ungaqala ukuyikhipha esikhunjeni. Lokhu kufanele kwenziwe ngokucophelela ukuze ungalimazi noma uhlanekezele umkhiqizo wakho wokugcina nganoma iyiphi indlela. Ngokubekezela okuncane nokunaka imininingwane ngalesi sigaba sokuqeda, uzogcina unesiqephu esiklanywe kahle esenziwe ngerabha ye-polyurethane!
Isiphetho
Sengiphetha, ukwenza irabha ye-polyurethane kudinga ukulungiswa ngokucophelela nokunaka imininingwane. Ngaphambi kokuqala inqubo yokuphonsa, kubalulekile ukukala kahle futhi uhlanganise izingxenye ze-polyurethane resin ngokusho kwemiyalelo yomkhiqizi. Lokhu kuzoqinisekisa ukuthi umkhiqizo wokugcina unezakhiwo ezifiselekayo nezici.
Uma i-resin ixutshwe, kufanele ithululwe esikhunjini esilungiselelwe kahle nge-ejenti yokukhulula. Khona-ke isikhunta kufanele sishiywe singaphazanyiswa amahora ambalwa ukuze i-resin ilulame ngokuphelele. Ngemuva kokwelapha, noma iyiphi impahla eyengeziwe ingasikwa futhi umkhiqizo oqediwe ungasuswa esikhunjeni.
Sekukonke, ukuphonsa irabha ye-polyurethane kungaba inqubo eyinselele kodwa enomvuzo kulabo abazimisele ukufaka isikhathi nomzamo odingekayo. Ngesu elifanele kanye nokunaka imininingwane, kungenzeka ukuthi udale ukulingisa kwekhwalithi ephezulu okuhlangabezana nezidingo zakho ezithile kanye nezidingo.
