Mushonga wekubvisa gass chinhu chinobatsira chinoburitsa zvinhu zvinoshanduka zvakaita semhepo, hunyoro, uye makemikari madiki emamorekuru anokonzerwa nekuchinjana uye kuoma kwepoda painonyunguduka yoita firimu. Inotsivawo maburi emamorekuru madiki anoburitswa panguva yakakodzera, ichidzivirira kubuda kwemaburi madiki kana maburi mufirimu repoda. Rudzi urwu rwekuwedzera ndeimwe yeanowanzo shandiswa mupoda, uye inowanzo wedzerwa mumafomura epoda.
Chinhu chinowanzoshandiswa kubvisa gassing mupowder coatings ibenzoin. Benzoin ikristaro chena kana yero yakajeka isina hwema ine melting point ye133-137 ℃ uye boiling point ye344 ℃. Inonyungudika zvishoma mumvura ne ether, uye inonyungudika mu hot acetone ne ethanol; Dambudziko rayo nderekuti inogona kukonzera yero ye coating pakupisa kwakanyanya. Kuti ikunde matambudziko e benzoin,mishonga inobvisa gasi yakagadzirwa nebenzoin newaxdzakagadzirirwa kuti dzisatsvukire kana dzichibikwa uye dzisisatsvukire.
Mhedzisiro yekuedza uye maitiro ekugadzira inoratidza kuti panguva yekubatanidza nekugadzira poda, mhando dzemachira dzinogadzira mamorekuru madiki dzinoda kuwedzerwa ma "degassing agents". Zvine musoro kuwedzera "degassing agent" mu "general epoxy, epoxy polyester, polyester, uye polyurethane powder coatings" nekuti "poda coatings" dzine matambudziko akadai sekunyorova nyore panguva yekugadzira nekushandisa. Mu "epoxy matte" uye "matte powder coatings", hazvisi nyore kugadzira ma "pinholes" nezvimwe zvikanganiso pasina kuwedzera ma "defoamers" akadai se "benzoin". Chikonzero hachigone kutsanangurwa zvakajeka parizvino, uye chinogonawo kunge chiri nekuda kwekuti pamusoro pe "coat" hapasi pakanaka uye pakajeka se "high gloss", uye zvimwe zvikanganiso zve "coat" hazvisi pachena, zvichikonzera kunzwa.
Parizvino, benzoin ichiri mushonga unoshandiswa zvakanyanya kubvisa gassing, ine dosage inosvika 0.5% yezvinhu zvose zvinogadzira firimu mupoda coatings, iyo inogona kugadziriswa zvakakodzera mukati memhando yakati zvichienderana nemhando uye kuumbwa kwepoda coatings. Mupoda coatings yepolyester-HAA (hydroxyalkylamide), tichifunga nezvesimba rebenzoin pakutsvuka kwefirimu, dosage yayo inofanira kudzorwa pa0.3% yehuwandu hwese hwezvinhu zvinogadzira firimu, uye kushandiswa kwayo kunofanira kuderedzwa zvakanyanya sezvinobvira.Pamusoro pezvo, mishonga inobvisa gasi yakagadzirwa newakisi inogona kushandiswawo, ine dose inosvika 1% yehuwandu hwese hwehupfu hunoputirwa.
Mumaforoma ekuputira hupfu, ma defoamers anowedzerwa kusimbi yakakandwa, aruminiyamu yakakandwa, ma galvanized steel plates anodziya, uye ma plates esimbi anoputika ane maburi ejecha kana maburi epinho pamusoro pechinhu chakaputirwa (workpiece) panguva yekuputira hupfu kudzivirira kuumbwa kwezvidimbu kana makomba emakomo anoputika mufirimu rekuputira. Izvi zvinowedzerwa kudzivirira kuumbwa kwemabubbles mufirimu rekuputira.
Kana chifukidziro cheupfu chikaiswa pazvikamu zvesimbi zvakakandwa, zvikamu zvearuminiyamu zvakakandwa, zvikamu zvakakandwa zvakapiswa kana mapureti esimbi akaputirwa nekupisa ane maburi ejecha kana maburi epinhole, panguva yekubika nekugaya, chifukidziro cheupfu chinonyunguduka uye chinotsvedza uku chichivhara maburi ejecha nemaburi epinhole pamusoro pechinhu chakaputirwa. Sezvo tembiricha yezvinhu zvakaputirwa ichiwedzera, mhepo iri mumaburi ejecha nemaburi epinhole echinhu chakaputirwa inowedzera, uye kumanikidzwa kwemukati kunoramba kuchikwira. Kana kumanikidzwa kwemukati kuri kukuru zvishoma kupfuura simba rechifukidziro chakanyungudutswa, mweya wemukati unoputika chifukidziro wogadzira maburi madiki kuti ubude. Nekuda kwekuita kwekusimba kwechifukidziro cheupfu panguva yekugadzira firimu, viscosity yekunyunguduka kwechifukidziro inoramba ichikwira uye pakupedzisira inova firimu rakasimba rekuputira. Naizvozvo, kana kumanikidzwa kwemukati mumaburi madiki kusingasvike simba rinodiwa kuti riputire firimu rekuputira, maburi madiki aya anoumba zvidimbu kana granules zvinobuda pamusoro pefirimu rekuputira. Kana kumanikidzwa kwemukati mubhuromu diki kwakakwana kuti riputire chifukidziro, bhuromu diki rinoputika uye mweya uri mukati unobuda mumhepo. Kana chifukidziro panguva ino charasikirwa nekukwanisa kwacho kuenzana uye chikasakwanisa kuvhara maburi madiki emhepo anobvumira mhepo kubuda, zvidimbu zvemugodhi wekuputika kwemakomo kana granules zvinoumbwa, zvova dambudziko guru.
Kana ma defoamers akawedzerwa ku powder coating, anogona kuderedza kunyunguduka kwe powder coating uye kuderedzawo kusimba kwe surface coating. Izvi zvinobvumira mhepo iri mumaburi ejecha nema pinholes pamusoro pechinhu chakafukidzwa, icho chinokanganiswa nekupisa kwekubikira nekumanikidzwa, kuti iputike zviri nyore uye iite kuti firimu re coating risina kucheneswa ripinde mumhepo. Panguva imwe chete, mipata iri mu coating film apo mabubbles anobuda anogonawo kuvharira nyore nyore, zvichidzivirira kuumbwa kwe zvidimbu nezvidimbu mu coating film, kana zvidimbu zvine volcanic pits.
Nekuti nzira dzekubvisa mafoam dzemacoatings akavakirwa mumvura neanonyungudutsa dzakasiyana zvachose nedzemacoatings eupfu, ma defoamers anoshandiswa mumacoatings akavakirwa mumvura neanonyungudutsa haagone kushandiswa zvakananga kumacoatings eupfu. Nekuda kwekusiyana kwemacoatings eupfu, hapana mhando dzakawanda dzema defoamers anoshandiswa mumacoatings eupfu semacoatings akavakirwa mumvura neanonyungudutsa.
Nguva yekutumira: Nyamavhuvhu-15-2025