Hunhu uye hunyanzvi hwekudhinda inki yemvura yepepa rakakorabhokisi rechokoreti
Inki yakagadzirwa nemvura inki isingakuvadzi nharaunda yave ichinyanya kufarirwa mumakore achangopfuura.bhokisi remakeke. Ndeupi musiyano uripo pakati peinki inogadzirwa nemvura neinki inodhindwa yakajairika, uye ndeapi mapoinzi anoda kutariswa pakushandiswa? Pano, Meibang achakutsanangurira zvakadzama.
Inki inoshandiswa mumvura yave ichishandiswa mukudhindwa kwepepa rakakombama kwenguva yakareba kunze kwenyika uye kwemakore anopfuura makumi maviri kumba. Kudhindwa kwepepa rakakombama kwave kuchigadzirwa kubva pakudhindwa kwelead (relief printing), kudhindwa kweoffset (offset printing) uye kudhindwa kwemvura nerabha plate kusvika pakudhindwa kweinki inoshandiswa mumvura nerabha nhasi. Inki inoshandiswa mumvura nerabha yave ichigadzirwawo kubva pakudhindwa kwerosin-maleic acid modified resins series (low grade) kusvika pakudhindwa kweacrylic resins series (high grade). Purati rekudhinda riri kuchinjawo kubva pakudhindwa kwerabha kuenda pakudhindwa kweresins. Muchina wekudhinda wave uchigadzirwawo zvishoma nezvishoma kubva pakudhindwa kwemavara maviri kana mavara maviri nemaroller makuru kuenda kumadhindindi eFLEXO ane mavara matatu kana mana.
Kuumbwa uye hunhu hweinki dzinobva mumvura zvakafanana nedzeinki dzinoshandiswa pakudhinda. Inki dzinobva mumvura dzinowanzo umbwa nezvinhu zvinoshandisa mavara, zvinosunga, zvinhu zvinobatsira nezvimwe zvinhu. Zvinhu zvinoshandisa mavara inki dzinobva mumvura, izvo zvinopa inki ruvara rwakasiyana. Kuti ionekwe zvakanaka mukudhindwa kweflexographic, zvinhu zvinoshandisa mavara zvinowanzo shandiswa mavara ane kugadzikana kwakanaka kwemakemikari uye simba rekupenda rakawanda; Chinhu chinosungirirwa chinosanganisira mvura, resin, amine compounds nezvimwe zvinonyungudutsa zve organic. Resin ndiyo inonyanya kukosha muinki dzinobva mumvura. Resin inonyunguduka mumvura inoshandiswa acrylic inowanzo shandiswa. Chinhu chinosungirirwa chinokanganisa zvakananga basa rekunamatira, kumhanya kwekuomesa, kushanda kwekudzivirira kunamira, nezvimwewo zveinki, uye chinokanganisawo kupenya uye kutapurirana kweinki. Mamine compounds anonyanya kuchengetedza alkaline PH value yeinki inobva mumvura, kuitira kuti acrylic resin igone kupa mhedzisiro iri nani yekudhinda. Mvura kana zvimwe zvinonyungudutsa zve organic zvinonyanya kunyunguduka maresini, Gadzirisa viscosity uye kumhanya kwekuomesa kweinki; Mishonga inobatsira inonyanya kusanganisira: defoamer, blocker, stabilizer, diluent, nezvimwewo.
Sezvo inki yakagadzirwa nemvura iri musanganiswa wesipo, zviri nyore kugadzira mabubbles ari kushandiswa, saka mafuta esilicone anofanira kuwedzerwa se defoamer kudzivirira uye kubvisa mabubbles, uye kuvandudza mashandiro ekutumira kweinki. Ma blockers anoshandiswa kudzivirira kumhanya kwekuoma kweinki yakagadzirwa nemvura, kudzivirira inki kuti isaome pa anilox roll uye kuderedza paste. Stabilizer inogona kugadzirisa PH value yeinki, uye inogonawo kushandiswa se diluent kuderedza viscosity yeinki. Diluent inoshandiswa kuderedza ruvara rweinki yakagadzirwa nemvura, uye inogonawo kushandiswa se lightener yekuvandudza kupenya kweinki yakagadzirwa nemvura. Pamusoro pezvo, imwe wax inofanira kuwedzerwa kuinki yakagadzirwa nemvura kuti iwedzere kuramba kwayo kupfeka.
Inki yakagadzirwa nemvura inogona kusanganiswa nemvura isati yaoma. Kana inki yaoma, haizonyungudike mumvura neinki. Saka, inki yakagadzirwa nemvura inofanira kusanganiswa zvizere isati yashandiswa kuti inki irambe yakafanana. Pakuwedzera inki, kana inki yasara mutangi reinki ine tsvina, inofanira kutanga yasefetwa, yozoshandiswa neinki itsva. Pakudhinda, usarega inki ikaoma pa anilox roll kudzivirira kuvhara gomba reinki. Kuvhara quantitative transmission yeinki kunokonzera kusagadzikana kwekudhinda. Munguva yekudhinda, flexplate inofanira kugara yakanyoroveswa neinki kudzivirira kuvhara pateni yemavara paplate yekudhinda mushure mekunge inki yaoma. Pamusoro pezvo, zvinowanikwa kuti kana viscosity yeinki yakagadzirwa nemvura yakakwira zvishoma, hazvina kukodzera kuwedzera mvura zvisina kurongeka kudzivirira kukanganisa kugadzikana kweinki. Unogona kuwedzera stabilizer yakakodzera kuti uigadzirise.
Nguva yekutumira: Kurume-15-2023
