Ukuphosa irabha yePolyurethane
Ukuphosa irabha yepolyurethane yindlela edumileyo esetyenziswa ngabavelisi ukwenza iimveliso ezihlala zihleli kwaye zibhetyebhetye. Inkqubo ibandakanya ukuxuba amacandelo amabini angamanzi, i-polyol kunye ne-isocyanate, kunye ngomlinganiselo ochanekileyo. Lo mxube ke ugalelwe kwingundo okanye emngxunyeni apho uya kuqina kwaye unyange ngokuhamba kwexesha.
Ukuqinisekisa ukuphosa okuyimpumelelo, kubalulekile ukulandela izilumkiso ezifanelekileyo zokhuseleko ezifana nokunxiba iiglavu zokhuselo kunye nempahla yamehlo, ukusebenza kwindawo enomoya opholileyo, kunye nokulandela izikhokelo zomenzi wokuphatha imichiza. Ukubumba kufuneka kwakhona kulungiswe ngokufaka i-arhente yokukhulula ukukhusela irabha ephilisiwe ukuba ibambelele kumphezulu.
Emva kokuba ugalelwe kwi-mold, umxube uya kuqala ukwandisa kancinci njengoko uphilisa. Emva kweeyure ezininzi okanye iintsuku ngokuxhomekeke kwiimfuno zemveliso, irabha ephothiweyo inokususwa kwi-mold kwaye igqitywe ngamanyathelo ongezelelweyo afana nokulungisa izinto ezingaphezulu okanye ukongeza ukuthungwa. Ngokubanzi, ukuphosa irabha ye-polyurethane inika abavelisi indlela esebenzayo yokuvelisa iimveliso ezikumgangatho ophezulu ezinamanqanaba ahlukeneyo obunzima kunye nokuguquguquka kuluhlu lwamashishini kubandakanya iimoto, iimpahla zabathengi kunye nezixhobo zonyango.
Ukuba ufumana i inkampani yenkonzo ye-polyurethane, ndiyacela Qhagamshelana nathi zive ukhululekile.
Izixhobo kunye neZibonelelo
Xa kuziwa ekujuleni irabha yepolyurethane, izixhobo kunye nezixhobo ozisebenzisayo zibalulekile ekuphumezeni iziphumo eziyimpumelelo. Okokuqala kunye nokuphambili, uya kufuna isikhunta esenziwe kwi-silicone okanye ezinye izinto ezifanelekileyo zokubamba i-polyurethane engamanzi. Ukongezelela, uya kufuna ii-agent zokukhulula ezifana ne-petroleum jelly okanye izisombululo zokutshiza ezithintela irabha ephilileyo ukuba ibambelele kumbumba.
Ubonelelo olulandelayo oluyimfuneko yi-polyurethane ngokwayo, ehlala iza kumacandelo amabini: i-resin kunye ne-hardener. Kubalulekile ukulinganisa la malungu ngokuchanekileyo ngelona xesha lokunyanga kunye nokomelela kwemveliso yokugqibela. Ngokuxhomekeke kubunzima obufunayo okanye inqanaba lokuguquguquka, unokukhetha kwiindidi ezahlukeneyo ze-polyurethane ezinereyishini ezahlukeneyo ze-resin-to-hardener.
Ezinye izinto ezibalulekileyo zibandakanya iikomityi zokuxuba, iintonga zokushukumisa, iiglavu, kunye neeglasi zokhuseleko kuba ukuphatha i-polyurethane engamanzi kufuna ingqalelo ebukhali ukuphepha ukucaphuka kwesikhumba okanye ukonakala kwamehlo. Nje ukuba zonke ezi mathiriyeli zifumaneke kwaye zisekwe ngokuchanekileyo ngokwemiyalelo yomenzi, lixesha lokuba uqale ukuphosa!
Ukulungiselela i-Mold
Ngaphambi kokuphosa irabha ye-polyurethane, ukulungisa umngundo linyathelo elibalulekileyo elingenako ukutsiba. Okokuqala, ukungunda kufuneka kucoceke kwaye kungabi nabumdaka okanye ubumdaka. Oku kunokufezekiswa ngokuxubha umphezulu wesikhunta ngebrashi ethambileyo-ethambileyo ukususa naziphi na iincinci ezincinci.
Emva koko, kubalulekile ukusebenzisa i-arhente yokukhulula kwindawo yokubumba. I-arhente yokukhulula iya kuthintela irabha ye-polyurethane ukuba ibambelele kwi-mold kwaye iqinisekise ukukhululwa okugudileyo xa kunyangwa. Kukho iintlobo ezahlukeneyo zeearhente zokukhulula ezikhoyo kwimarike, njengezitshizi okanye ulwelo, kwaye ukukhetha enye kuxhomekeke kwizinto ezahlukeneyo ezifana nodidi lwe-resin kunye nexesha lokunyanga.
Ekugqibeleni, kucetyiswa ukuba ungeze iziteshi zokungena kwiindawo apho iipokotho zomoya zingenza khona ngexesha lokunyanga. Ezi tshaneli zivumela umoya ovalelweyo ukuba ubaleke ngexesha lokuphosa kwaye uthintele iziphene kwimveliso yokugqibela. Imijelo yokukhupha umoya inokwenziwa ngokugrumba imingxuma emincinci kwiindawo apho umoya unokuvaleleka khona, njengeekona okanye izithuba ezixineneyo.
Lilonke, ukulungisa ngokufanelekileyo ukubumba kwakho phambi kokuphosa irabha yepolyurethane kubalulekile ekuphumezeni iziphumo ezikumgangatho ophezulu kunye nokuqinisekisa ukuba umngundo wakho uhlala ixesha elide ngaphandle komonakalo.
Ukudibanisa i-Rubber Compound
Ukuphosa irabha ye-polyurethane, umntu kufuneka axube i-compound enamacandelo amabini. Inxalenye yokuqala yi-polyol okanye i-resin, ebonelela ngomqolo wepolymer. Inxalenye yesibini yi-isocyanate okanye i-hardener ephendula kunye ne-polyol ukwenza i-polymer eqinile. Ukudibanisa la malungu mabini kunye kuqalisa isenzo sekhemikhali esiguqula umxube wolwelo ube yilastiki kunye nemathiriyeli eyomeleleyo.
Inkqubo yokuxuba kufuneka ichaneke njengoko imisela iimpawu zemveliso yokugqibela. Ukuxuba okungonelanga kunokushiya iipokotho ezingaxutywanga kwi-casting yakho yokugqibela, okukhokelela ekungahambelani kobunzima, umbala kunye nokuthungwa. Isenokubangela ukunxitywa kwangaphambi kwexesha kunye nokukrazula kwezixhobo ngenxa yokusasazwa okulinganayo koxinzelelo ngexesha lokusa kwakho.
Ukufezekisa iziphumo ezichanekileyo ngexesha lokuxuba, kubalulekile ukusebenzisa imilinganiselo echanekileyo kuwo omabini amacandelo ekhompawundi yakho, landela imiyalelo yomenzi ngokusondeleyo kwaye usebenzise izixhobo ezifanelekileyo zokhuseleko ezifana neeglavu, iiglavu kunye neziphefumlo xa ubamba le michiza. Nje ukuba udibanise iikhompawundi zakho ngocoselelo, zigalele kwizibumba ezichongiweyo ngokukhawuleza phambi kokuba ziqale ukunyanga okanye ukuqina - oku kuqinisekisa ukufana kuzo zonke iisamente zakho.
Ukugalela kunye nokuNyanga
Ukugalela kunye nokunyanga ngamanyathelo ayimfuneko ekujuleni irabha ye-polyurethane. Ngaphambi kokuqala inkqubo, kubalulekile ukulungiselela isikhunta ngokucoca kunye nokusebenzisa i-agent agent. Xa umngundo sele ulungile, lixesha lokuxuba irabha ye-polyurethane ngokwemiyalelo yomenzi. Umlinganiselo wamacandelo A kunye no-B kufuneka uchaneke ukuqinisekisa ukunyangwa okufanelekileyo.
Emva koko, ngokukhawuleza uthele irabha edibeneyo ye-polyurethane kwi-mold. Kubalulekile ukunqanda ukwazisa amaqamza omoya ngeli nyathelo ngokugalela kancinci kwaye usebenzise umjelo obhityileyo womxube. Emva kokugalela, cofa ngobunono okanye ungcangcazele ukungunda ukunceda nawaphi na amaqamza omoya aseleyo anyukele phezulu.
Inkqubo yokunyanga inokuthatha naphi na ukusuka kwiiyure ezininzi ukuya kwiintsuku ezimbalwa ngokuxhomekeke kwizinto ezifana nobushushu, ukufuma, kunye nobukhulu besamente. Kubalulekile ukuba ungaphazamisi okanye ukususe ukuphosa de kube kunyangekile njengoko ukususwa kwangaphambi kwexesha kunokukhokelela kuguquko okanye ukukrazuka kwezinto. Nje ukuba uphile ngokupheleleyo, susa ngononophelo into entsha yerabha ye-polyurethane ekubumbeni kwayo ukuze isetyenziswe ngakumbi okanye ukugqiba ukubamba.
Ukuqeda iifowuni
Emva kokugalela umxube we-polyurethane kwi-mold, lixesha lokugxila ekugqityweni okuza kwenza imveliso yakho yokugqibela ikhanye. Elinye lawona manyathelo abalulekileyo kukukhupha ngononophelo nawaphi na amaqamza omoya anokuthi awakhe ngexesha lenkqubo yokuphosa. Oku kunokwenziwa ngokucofa ngobunono okanye ukungcangcazelisa ukungunda ukukhuthaza nawaphina amaqamza omoya avalelweyo ukuba anyukele phezulu aze aphume.
Emva kokuba uqinisekisile ukuba onke amaqamza omoya asusiwe, lixesha lokuba uvumele unyango lwakho lwerabha ye-polyurethane. Inkqubo yokunyanga ithatha iiyure ezininzi kwaye akufuneki ikhawulezelwe. Kubalulekile ukuba uvumele i-cast yakho ihlale ingaphazamiseki ide iphiliswe ngokupheleleyo phambi kokuba uzame ukuyisusa kwisingundo.
Ekugqibeleni, emva kokuba i-cast yakho iphiliswe ngokupheleleyo, ungaqala ukuyisusa kwi-mold. Oku kufuneka kwenziwe ngononophelo ukuze ungonakali okanye ugqwethe imveliso yakho yokugqibela nangayiphi na indlela. Ngomonde omncinci kunye nengqalelo kwiinkcukacha ngeli nqanaba lokugqiba, uya kuphelela kwisiqwenga esiyilwe kakuhle esenziwe ngerabha yepolyurethane!
isiphelo
Ukuqukumbela, ukuphosa irabha ye-polyurethane kufuna ukulungiswa ngononophelo kunye nengqalelo kwiinkcukacha. Ngaphambi kokuqala inkqubo yokuphosa, kubalulekile ukulinganisa ngokufanelekileyo kunye nokuxuba amacandelo e-polyurethane resin ngokwemiyalelo yomenzi. Oku kuya kuqinisekisa ukuba imveliso yokugqibela ineempawu ezifunwayo kunye neempawu.
Emva kokuba i-resin ixutywe, kufuneka igalelwe kwi-mold elungiselelwe ngokufanelekileyo kunye ne-agent agent. Ukubumba kufuneka kushiywe kungaphazamiseki iiyure ezininzi ukuvumela i-resin ukuba iphilise ngokupheleleyo. Emva kokunyanga, nayiphi na into engaphezulu inokucocwa kwaye imveliso egqityiweyo inokususwa kwi-mold.
Ngokubanzi, ukuphosa irabha ye-polyurethane kunokuba ngumngeni kodwa inkqubo enomvuzo kwabo bazimisele ukubeka ixesha kunye nomzamo ofunekayo. Ngobuchule obufanelekileyo kunye nengqalelo kwiinkcukacha, kunokwenzeka ukwenza udidi oluphezulu oluhlangabezana neemfuno zakho kunye neemfuno.
