Makhalidwe ndi luso losindikiza la inki yochokera kumadzi pamapepala a malatabokosi la chokoleti
Inki yochokera m'madzi ndi inki yosamalira zachilengedwe yomwe yadziwika kwambiri m'zaka zaposachedwabokosi la makeke.Kodi pali kusiyana kotani pakati pa inki ya m’madzi ndi inki yosindikizira, ndipo ndi mfundo ziti zofunika kuziganizira pakugwiritsa ntchito?Apa, Meibang akufotokozerani mwatsatanetsatane.
Inki yamadzi yakhala ikugwiritsidwa ntchito posindikiza mapepala a malata kwa nthawi yaitali kunja kwa dziko komanso kwa zaka zoposa 20 kunyumba.Makina osindikizira a mapepala okhala ndi malata ayamba kuchokera ku makina osindikizira a lead (relief printing), offset printing (offset printing) ndi makina ochapira amadzi a rabara kupita ku makina amasiku ano osinthira a inki otengera madzi.Inki yosinthika yochokera m'madzi yapangidwanso kuchokera ku rosin-maleic acid modified resin series (low grade) mpaka acrylic resin series (high grade).Puleti yosindikizira ikusinthanso kuchoka ku mbale ya rabala kupita ku mbale ya utomoni.Makina osindikizira nawonso apangidwa pang’onopang’ono kuchoka ku makina amtundu umodzi kapena amitundu iwiri okhala ndi zogudubuza zazikulu kufika pamitundu itatu kapena mitundu inayi ya FLEXO.
Mapangidwe ndi mawonekedwe a inki zochokera kumadzi ndizofanana ndi za inki zosindikizira.Inki zokhala ndi madzi nthawi zambiri zimakhala ndi utoto, zomangira, zothandizira ndi zina.Mitundu ndi mitundu ya inki yochokera m'madzi, yomwe imapatsa inki mtundu wina.Pofuna kupangitsa chithunzicho kukhala chowala mu kusindikiza kwa flexographic, ma colorants nthawi zambiri amagwiritsa ntchito inki yokhala ndi kukhazikika kwamankhwala komanso mphamvu zopaka utoto wapamwamba;Chomangiracho chimakhala ndi madzi, utomoni, mankhwala a amine ndi zosungunulira zina.Utomoni ndiye chinthu chofunikira kwambiri pa inki zokhala ndi madzi.Madzi osungunuka a acrylic resin nthawi zambiri amagwiritsidwa ntchito.The binder chigawo mwachindunji zimakhudza ntchito adhesion, kuyanika liwiro, odana ndi kukakamira ntchito, etc. wa inki, komanso zimakhudza gloss ndi inki kufala kwa inki.Mankhwala a Amine makamaka amakhala ndi alkaline PH mtengo wa inki yochokera kumadzi, kotero kuti utomoni wa acrylic ukhoza kusindikiza bwino.Madzi kapena zosungunulira zina organic makamaka kusungunuka resins, Sinthani mamasukidwe akayendedwe ndi kuyanika liwiro la inki;Zothandizira makamaka zimaphatikizapo: defoamer, blocker, stabilizer, diluent, etc.
Monga inki yamadzi ndi sopo, ndizosavuta kupanga thovu zomwe zimagwiritsidwa ntchito, kotero mafuta a silicone ayenera kuwonjezeredwa ngati defoamer kuti aletse ndi kuthetsa thovu, komanso kupititsa patsogolo ntchito yotumizira inki.Ma blockers amagwiritsidwa ntchito kuletsa kuthamanga kwa inki yochokera m'madzi, kuletsa inki kuti iume pa mpukutu wa anilox ndikuchepetsa phala.The stabilizer akhoza kusintha PH mtengo wa inki, ndipo angagwiritsidwe ntchito ngati diluent kuchepetsa mamasukidwe akayendedwe a inki.Diluent imagwiritsidwa ntchito pochepetsa mtundu wa inki yochokera m'madzi, komanso imatha kugwiritsidwa ntchito ngati chowunikira kuti iwonetsere kuwala kwa inki yochokera m'madzi.Kuphatikiza apo, sera ina iyenera kuwonjezeredwa ku inki yochokera kumadzi kuti iwonjezere kukana kwake.
Inki yochokera m'madzi imatha kusakanikirana ndi madzi musanayanike.Inkiyo ikauma, sidzasungunukanso m'madzi ndi inki.Choncho, inki madzi ofotokoza ayenera mokwanira analimbikitsa pamaso ntchito kusunga inki zikuchokera yunifolomu.Powonjezera inki, ngati inki yotsalira mu thanki ili ndi zonyansa, imayenera kusefedwa kaye, kenako ndikugwiritsa ntchito inki yatsopano.Mukamasindikiza, musalole inkiyi iume pa mpukutu wa anilox kuti musatseke dzenje la inki.Kuletsa kufala kwa kachulukidwe ka inki kumayambitsa kusakhazikika kwa kusindikiza.Panthawi yosindikizira, flexplate iyenera kunyowetsedwa nthawi zonse ndi inki kuti zisatseke zolemba pamapepala osindikizira pambuyo pouma inki.Kuonjezera apo, zimapezeka kuti pamene kukhuthala kwa inki yochokera m'madzi kumakhala kochepa kwambiri, sikoyenera kuwonjezera madzi mwachisawawa kuti asasokoneze kukhazikika kwa inki.Mutha kuwonjezera kuchuluka koyenera kwa stabilizer kuti musinthe.
Nthawi yotumiza: Mar-15-2023