Hmoov txheej yog txheej txheem qhuav tiav uas tau dhau los ua neeg nyiam heev txij li nws tau qhia hauv North America dhau xyoo 1960. Los ntawm lub tshuab ntxhua khaub ncaws thiab lub tshuab ziab khaub ncaws mus rau tsheb, tes tuav, laj kab thiab lwm yam, suav tsis txheeb cov khoom tsim los ntawm cov hmoov nplej -coated nto.
Hauv kab lus no, txhua yam koj yuav tsum paub txog cov hmoov txheej yuav raug qhia.
Powder Txheej yog dab tsi?
Hmoov Txheej yog ib txoj hauv kev los ua xim sib txawv xws li hlau, pob zeb, hlau, thiab yas. Txoj kev nws ua haujlwm yog tias cov hmoov ntawm ib qho xim yog txau rau saum npoo, uas tuav cov nqi hluav taws xob. Tus nqi ua rau cov hmoov ua raws li qhov chaw, thiab nws yog ci rau ib zaug ua tiav. Piv nrog rau cov xim, cov hmoov txheej yog ib txoj hauv kev zoo tshaj - nws ua rau muaj kev ruaj khov zoo dua qub, txo qhov cuam tshuam ib puag ncig, thiab zoo dua zoo dua.
Cov hmoov txheej ua haujlwm li cas?
When a product is powder coated, it's sprayed with pressurized dry powder that sticks to the product's surface. This application method uses a spray gun, which applies an electrostatic charge to the powder particles, which are then attracted to the grounded part.
Tom qab siv cov hmoov txheej, cov khoom nkag mus rau hauv qhov cub curing qhov twg, nrog rau qhov sib ntxiv ntawm cov cua sov, cov txheej txheej chemically reacts los tsim cov saw ntev molecular, ua rau muaj kev sib tw siab -link density. Cov saw hlau molecular no tiv taus kev tawg. Cov kauj ruam no yog kho. Feem ntau, kev kho yog ua ntawm 400 F rau kwv yees li 20-30 feeb nyob ntawm qhov chaw.
Surface preparation/pretreatment is also essential for achieving a successful powder-coating outcome. This normally entails the removal of grease, oil, dirt and other materials via chemical, physical or mechanical methods to clean the surface and promote coating adhesion. Pretreating the workpiece with chemical compounds can enhance the coating's performance, durability and corrosion resistance.
Hom kev thov no yog txoj kev siv ntau tshaj plaws ntawm kev thov hmoov. Cov hmoov txheej tuaj yeem siv rau cov hlau substrate xws li stainless hlau lossis txhuas, lossis tsis yog -hlau substrates xws li plastics thiab nruab nrab ntom fiberboard.
Hom Hmoov Txheej
Muaj ob lub ntsiab ntawm cov hmoov txheej, uas yog, thermoplastics thiab thermosets.
The thermoplastics variety does not undergo any additional reactions during the baking process, but rather only flows out into the final coating. Thermoplastics pellets soften when heated and become more fluid as additional heat is applied. The curing process is completely reversible as no chemical bonding takes place. This characteristic allows thermoplastics to be remolded and recycled without negatively affecting the material's physical properties. There are multiple thermoplastic resins that offer various performance benefits, but most materials commonly offer high strength, shrink-resistance and easy bendability. Depending on the resin, thermoplastics can serve low-stress applications such as plastics bags or high-stress mechanical parts.
Cov thermosets ntau yam suav nrog tus ntoo khaub lig-linker rau hauv cov qauv. Tus ntoo khaub lig- cov txheej txheem sib txuas tshem tawm qhov kev pheej hmoo ntawm cov khoom remelting thaum tshav kub kub, ua cov thermosets zoo tagnrho rau siab - cov ntawv siv cua sov xws li cov khoom siv hluav taws xob thiab cov khoom siv. Thaum cov hmoov ci ci, nws hnov mob nrog lwm pawg tshuaj hauv cov hmoov polymer thiab ua rau kom qhov hnyav molecular thiab txhim kho cov khoom ua tau zoo, yog li nws tsis tuaj yeem rov ua dua cov hmoov thermoset. Tsis tas li ntawd, cov txheej txheem thermoset feem ntau yog pheej yig dua ntawm ob.
Cov hmoov txheej siv rau dab tsi?
Txij li cov hmoov txheej yog tsim los ntawm tus kws tshawb fawb German Dr. Erwin Gemmer hauv xyoo 1940, nws tau siv los ntawm ib qho thiab txhua qhov kev lag luam uas siv hlau, lub raj mis kev lag luam tsis muaj kev zam.
Hmoov txheej ua ntau thiab nrov niaj hnub no rau insulated stainless hlau fwj. Muaj ntau qhov zoo ntawm cov hmoov txheej txheej: tiv thaiv - plam, ruaj thiab muaj yeeb yuj. Raws li lub tshuab nqus tsev vacuum insulated stainless hlau dej lub raj mis chaw tsim tshuaj paus, GiNT muaj kev nplua nuj nyob rau hauv hmoov txheej txheej txheem, thiab muab ib tug ntau ntawm high - zoo hmoov coated fwj.
Yog tias koj xav paub ntxiv, tsuas yog tiv tauj peb @kira@gint.cc
