Mumakumi emakore apfuura, kushandiswa kwezvinonyungudutsa kunoburitswa mumhepo kwave kuri kuderedza huwandu hwezvinonyungudutsa zvinoburitswa mumhepo. Izvi zvinonzi maVOC (zvinonyungudutsa organic compounds) uye, zvinobudirira, zvinosanganisira zvese zvinonyungudutsa zvatinoshandisa kunze kweacetone, iyo ine reactivity yakaderera ye photochemical uye yakabviswa seVOC solvent.
Asi zvakadini kana tikakwanisa kubvisa zvinonyungudutsa zvachose asi tichiwana mhedzisiro yakanaka yekudzivirira uye yekushongedza nekushanda nesimba?
Izvozvo zvingave zvakanaka — uye tinogona. Tekinoroji inoita kuti izvi zvikwanisike inonzi UV curing. Yave ichishandiswa kubvira kuma1970 pazvinhu zvakasiyana-siyana zvinosanganisira simbi, mapurasitiki, magirazi, mapepa uye, zvakanyanya, zvehuni.
Mapendi eUV-cured anoporesa kana akaiswa pachiedza cheultraviolet munzvimbo ine nanometer yakaderera kana kuti iri pasi pechiedza chinoonekwa. Zvakanakira zvawo zvinosanganisira kuderedza zvakanyanya kana kubvisa zvachose maVOC, marara mashoma, nzvimbo shoma yepasi inodiwa, kubata nekurongedza nekukasika (saka hapana chikonzero chekuomesa ma racks), kuderedza mari yevashandi uye kukurumidza kugadzira.
Zvinhu zviviri zvakakosha zvakaipira zvinosanganisira mitengo yepamusoro yemidziyo uye kuoma kwayo kupedzisa zvinhu zvakaoma zve3-D. Saka kupinda muUV curing kunowanzo shandiswa chete muzvitoro zvikuru zvinogadzira zvinhu zvakati sandara zvakaita semasuo, mapaneru, pasi, trim uye zvikamu zvakagadzirira kuunganidzwa.
Nzira iri nyore yekunzwisisa mafinishe eUV-cured ndeyekuenzanisa iwo nemafinishe akajairika aunogona kunge wajaira. Sezvakaita nemafinishe ecatalyzed, mafinishe eUV-cured ane resin yekugadzira, solvent kana chinotsiva kutetepa, catalyst yekutanga crosslinking uye kuunza curing nezvimwe zvinowedzera zvakaita se flatting agents kuti zvipe hunhu hwakakosha.
Maresin akawanda anoshandiswa, kusanganisira epoxy, urethane, acrylic uye polyester.
Muzviitiko zvese, maresini aya anoporesa zvakasimba uye haanyungudike nekukwenya, zvakafanana nevharnish yakasanganiswa (catalyzed). Izvi zvinoita kuti kugadzirisa kusingaonekwe kuve kwakaoma kana firimu rakacheneswa rikakuvara.
Kupera kweUV-cured kunogona kuva zvinhu zvakasimba zana muzana muchimiro chemvura. Kureva kuti, ukobvu hwezvinoiswa pahuni hwakafanana neukobvu hwejira rakacheneswa. Hapana chekupwanyika. Asi resin yekutanga yakakora zvakanyanya kuti isashandiswa zviri nyore. Saka vagadziri vanowedzera mamorekuru madiki e reactive kuti vaderedze viscosity. Kusiyana nezvinyungudutsa, izvo zvinopwanyika, mamorekuru aya anowedzera anosangana nemamorekuru e resin kuti aumbe firimu.
Zvinonyungudutsa kana mvura zvinogona kuwedzerwawo sezvinhu zvinonyungudutsa kana paine firimu rakatetepa rinodiwa, semuenzaniso, rejasi rekuvharira. Asi hazviwanzodiwa kuti pave nekupfapfaidza. Kana zvinonyungudutsa kana mvura zvawedzerwa, zvinofanirwa kubvumidzwa, kana kugadzirwa (muovheni), kuti zviome usati watanga kupiswa neUV.
Chinokonzeresa
Kusiyana nevharnish yakakamurwa, iyo inotanga kuomera kana catalyst yawedzerwa, catalyst iri muUV-cured finish, inonzi "photoinitiator," haiite chero chinhu kusvika yaiswa pasimba rechiedza cheUV. Zvadaro inotanga kukurumidza kuita chain reaction iyo inobatanidza mamorekuru ese ari mu coating pamwe chete kuti igadzire firimu.
Maitiro aya ndiwo anoita kuti magumo eUV-cured ave akasiyana. Hapana nguva yekushanda pasherufu kana muhari yekupedzisa. Inoramba iri muchimiro chemvura kusvika yaiswa pachiedza cheUV. Zvadaro inopora zvachose mukati memasekonzi mashoma. Yeuka kuti chiedza chezuva chinogona kukonzera kupenya, saka zvakakosha kudzivirira rudzi urwu rwekupenya.
Zvingave nyore kufunga nezvechinhu chinokonzera kupenya kweUV sezvikamu zviviri pane chimwe chete. Pane chinhu chinotanga kupenya chatovepo — chinosvika 5 muzana yemvura — uye pane simba rechiedza cheUV rinochitanga. Pasina zvese izvi, hapana chinoitika.
Hunhu uhwu hwakasiyana hunoita kuti zvikwanisike kudzosa overspray kunze kweUV light uye kushandisa finish zvakare. Saka marara anogona kubviswa zvachose.
Mwenje weUV wekare ibhurubhu re mercury-vapor pamwe chete ne elliptical reflector yekuunganidza nekutungamira chiedza pachikamu chacho. Pfungwa ndeyekutarisa chiedza kuti chishande zvakanyanya pakubatidza photoinitiator.
Mumakore gumi apfuura kana kupfuura ma LED (light-emitting diodes) akatanga kutsiva mababu ekare nekuti ma LED anoshandisa magetsi mashoma, anogara kwenguva yakareba, haafanire kudziya uye ane hurefu hwakamanikana hwewavelength saka haagadzire kupisa kwakanyanya kunokonzera matambudziko. Kupisa uku kunogona kunyungudutsa ma resin ari muhuni, senge mupine, uye kupisa kunofanira kupera.
Maitiro ekugadzika kwechiedza akafanana, zvisinei. Zvese zviri "munzira yekuona." Kuguma kwechiedza kunoporesa chete kana chiedza cheUV chikachirova kubva kure. Nzvimbo dziri mumumvuri kana dzisiri panzvimbo yechiedza hadziporesi. Uku ndiko kuganhurira kwakakosha kweUV panguva ino.
Kuti chifukidziro chigadziriswe pane chero chinhu chakaoma, kunyangwe chinhu chakaita sechinoumbwa neprofile, mwenje inofanira kurongeka kuitira kuti irove pamusoro pese padaro rakafanana kuti ienderane nechimiro chechifukidziro. Ichi ndicho chikonzero nei zvinhu zvakati sandara zvichiumba mapurojekiti mazhinji akafukidzwa neUV-cured finish.
Nzira mbiri dzakajairika dzekushandisa UV-coating uye kuporesa imhando yeflat line uye chamber.
Netambo yakati sandara, zvinhu zvakati sandara kana kuti zvakati sandara zvinofamba nepa conveyor pasi pe spray kana roller kana nepa vacuum chamber, zvobva zvapfuura nepa oven kana zvichidikanwa kubvisa solvents kana mvura uye pakupedzisira pasi pe UV rambi dzakawanda kuti dzigadziriswe. Zvinhu zvinogona kuiswa ipapo ipapo.
Mumakamuri, zvinhu zvinowanzoturika uye zvinofambiswa nepamuchina wekutakura zvinhu nematanho akafanana. Kamuri rinoita kuti mativi ese apedzwe panguva imwe chete uye zvinhu zvisina kuoma, zvine mativi matatu zvipedzwe.
Imwe nzira ndeyekushandisa robhoti kutenderedza chinhu pamberi pemwenje yeUV kana kubata rambi reUV wofambisa chinhu chacho chakakomberedza.
Vatengesi vanoita basa guru
Nemachira nemidziyo yakacheneswa neUV, zvinonyanya kukosha kushanda nevatengesi pane mavarnish akagadziriswa. Chikonzero chikuru ndechekuti pane zvinhu zvinofanirwa kurongeka. Izvi zvinosanganisira kureba kwemababu kana ma LED uye daro rawo kubva pazvinhu, kugadzirwa kwechirairo uye kumhanya kwemutsara kana uri kushandisa tambo yekupedzisa.
Nguva yekutumira: Kubvumbi-23-2023
