mukati memakumi emakore anoverengeka apfuura kwave kuri kuderedza kuwanda kwezvinonyungudutsa zvakaburitswa kumhepo. Aya anonzi maVOCs (volatile organic compounds) uye, zvinobudirira, anosanganisira zvese zvinonyungudutsa zvatinoshandisa kunze kweacetone, iyo ine yakanyanya kuderera photochemical reactivity uye yakasunungurwa seVOC solvent.
Asi zvakadini kana tikakwanisa kubvisa zvinonyungudutsa zvachose uye tichingowana zvidziviriro zvakanaka uye zvekushongedza mhedzisiro nekuita zvishoma?
Izvo zvingave zvakanaka - uye isu tinogona. Tekinoroji inoita kuti izvi zviitike inonzi UV kurapa. Yave ichishandiswa kubva kuma1970 kune ese marudzi ezvigadzirwa zvinosanganisira simbi, plastiki, girazi, bepa uye, zvichiwedzera, zvehuni.
UV-akaporeswa machira anorapa kana akafumurwa kune ultraviolet mwenje mu nanometer renji kumucheto kwakadzika kana kuzasi kwechiedza chinooneka. Zvakanakira zvavo zvinosanganisira kudzikisira kwakakosha kana kubviswa kwakazara kweVOCs, kuraswa kushoma, nzvimbo shoma yepasi inodiwa, kubata nekukasira (saka hapana chikonzero chekuomesa rack), kuderedzwa kwemitengo yevashandi uye nekukurumidza mitengo yekugadzira.
Izvo zviviri zvakakosha zvakaipira mutengo mukuru wekutanga wemidziyo uye kuomerwa kupedzisa yakaoma 3-D zvinhu. Saka kupinda mukurapa kweUV kazhinji kunogumira kuzvitoro zvakakura zvinogadzira zvinhu zvakati sandarara zvakaita semagonhi, mapaneru, pasi, kucheka uye zvakagadzirira-ku-kuunganidza zvikamu.
Iyo iri nyore nzira yekunzwisisa UV-yakaporeswa kupera ndeyekuvaenzanisa neakajairika catalyzed kupera kwaungangove uchijaira. Sezvinei nemapedzisiro akaitwa, UV-akaporeswa anopedza ane resin yekuwana kuvaka, chinonyungudutsa kana chinotsiva kutetepa, chinokonzeresa kutanga kubatanidza uye kuunza kurapa uye zvimwe zvinowedzera senge flatting agents kuti ipe hunhu hwakakosha.
A akati wandei ekutanga resin anoshandiswa, anosanganisira anobva epoxy, urethane, acrylic uye polyester.
Muzviitiko zvese, marezeni aya anorapa zvakaomarara uye anonyungudika- uye anodzivirira kukwenya, akafanana necatalyzed (conversion) varnish. Izvi zvinoita kuti kugadzirisa kusingaonekwe kuve kwakaoma kana firimu rakarapwa richifanira kukuvara.
UV-yakaporeswa inopera inogona kuita zana muzana yezvakaoma mumhando yemvura. Iko ndiko, kuwanda kwezvakaiswa pahuni kwakafanana nehupamhi hwehuputi hwakaporeswa. Hapana chekupunyuka. Asi iyo yekutanga resin yakakora kwazvo kuti isashande nyore. Saka vagadziri vanowedzera madiki mamorekuru anogadzirisa kuderedza viscosity. Kusiyana nezvinonyungudutsa zvinonyunguduka, aya akawedzera mamorekuru anoyambuka neakura resin mamorekuru kuti aumbe firimu.
Solvents kana mvura inogonawo kuwedzerwa seyakaonda kana yakaonda firimu kuvaka inodiwa, semuenzaniso, kune sealer jasi. Asi ivo havawanzo kudikanwa kuita kuti kupera kufefeterwa. Kana zvinonyungudutsa kana mvura zvawedzerwa, zvinofanirwa kubvumidzwa, kana kugadzirwa (muchoto), kuti zvinyunguduke kusati kwatanga kurapwa kweUV.
The catalyst
Kusiyana necatalyzed varnish, iyo inotanga kurapa kana catalyst yawedzerwa, iyo catalyst mu UV-yakaporeswa kupera, inonzi "photoinitiator," haiite chero chinhu kudzamara yaratidzwa kune simba reUV mwenje. Zvadaro inotanga kukurumidza kweketani yekuita iyo inobatanidza mamorekuru ose ari mujasi pamwe chete kuti aumbe firimu.
Iyi maitiro ndiyo inoita kuti UV-yakaporeswa inopedza kuve yakasarudzika. Iko chaiko hakuna sherufu- kana hupenyu hwehari yekupedzisa. Iyo inoramba iri muchimiro chemvura kusvika yaiswa pachena kune UV mwenje. Zvadaro inopora zvachose mukati memasekonzi mashoma. Ramba uchifunga kuti chiedza chezuva chinogona kubvisa kurapa, saka zvakakosha kuti udzivise rudzi urwu rwekuratidzwa.
Zvingave zviri nyore kufunga nezve inokonzeresa yeUV yekupfeka sezvikamu zviviri kwete chimwe chete. Kune iyo photoinitiator yatove mukupera - yakatenderedza 5 muzana yemvura - uye kune simba remwenje weUV rinorimisa. Pasina zvose zviri zviviri, hapana chinoitika.
Iyi yakasarudzika hunhu inoita kuti zvikwanise kudzoreredza overspray kunze kweiyo mwenje weUV uye shandisa kupedzisa zvakare. Saka tsvina inogona kupedzwa zvachose.
Iyo yechinyakare UV mwenje imercury-vapor bulb pamwe neelliptical reflector kuunganidza uye kunangisa mwenje pachikamu. Pfungwa ndeyekutarisa mwenje kune yakanyanya mhedzisiro mukumisa iyo photoinitiator.
Mumakore gumi apfuura kana kuti maLED (light-emitting diodes) akatanga kutsiva magirobhu echinyakare nekuti maLED anoshandisa magetsi mashoma, anogara kwenguva refu, haafanire kudziya uye ane nhete yewavelength kuti asagadzire zvakada kufanana. dambudziko rakawanda rinokonzera kupisa. Kupisa uku kunogona kunyorovesa resin muhuni, senge mupaini, uye kupisa kunofanira kupera.
Nzira yekurapa yakafanana, zvisinei. Zvose "mutsara wekuona." Mhedziso inorapa chete kana mwenje weUV ukairova kubva kure. Nzvimbo dziri mumumvuri kana kunze kwechiedza hachipore. Uku ndiko kudzikisira kwakakosha kwekuporeswa kweUV panguva ino.
Kuti urape chirairo pane chero chinhu chakaomarara, kunyangwe chinhu chakati sandarara senge profiled molding, marambi anofanirwa kurongeka kuti arove pese pese pachinhambwe chakatemerwa kuti aenderane nekugadzirwa kwejasi. Ichi ndicho chikonzero kuti zvinhu zvakapfava zvinoumba huwandu hukuru hwemapurojekiti akaputirwa neUV-yakaporeswa kupera.
Iwo maviri magadzirirwo akajairwa eUV-coating application uye kurapa ndeye flat line uye kamuri.
Iine mutsara wakafuratira, iyo yakafuratira kana inenge yakatsetseka zvinhu zvinodzika pasi pedhiraivha pasi pepfapfaidzo kana roller kana kuburikidza nekamuri yekutsvaira, ipapo kuburikidza nechoto kana zvichidikanwa kubvisa zvinonyungudutsa kana mvura uye pakupedzisira pasi pemhando yemarambi eUV kuunza mushonga. Zvinhu zvacho zvinokwanisa kuiswa ipapo ipapo.
Mumakamuri, zvinhu zvinowanzoturikwa uye zvinofambiswa pamwe chete neconveyor kuburikidza nematanho mamwe chete. Kamuri inoita kuti zvikwanisike kupedzwa kwemativi ese kamwechete uye kupera kwezvinhu zvisina kuoma, zvitatu-dimensional.
Imwe mukana ndeye kushandisa robhoti kutenderedza chinhu pamberi pemarambi eUV kana kubata mwenje weUV uye kufambisa chinhu ichitenderedza.
Vatengesi vanoita basa guru
Iine maV-akaporeswa machira nemidziyo, zvakatonyanya kukosha kushanda nevanopa pane nemavhanishi akagadzirwa. Chikonzero chikuru nhamba yemhando dzinofanirwa kubatanidzwa. Izvi zvinosanganisira kureba kwema bulbs kana ma LED uye kureba kwavo kubva kune zvinhu, kuumbwa kwejasi uye kumhanya kwemutsara kana uri kushandisa mutsara wekupedzisa.
Nguva yekutumira: Kubvumbi-23-2023
