Label printing npog ntau txoj kev luam ntawv tseem ceeb, nyob rau hauv lub phaj ua theem. Raws li qhov xwm txheej ntawm cov khoom sib txawv, cov txheej txheem luam ntawv sib txawv raug xaiv, thiab cov phaj- ua cov txheej txheem kuj txawv rau ntau txoj kev luam ntawv. Daim ntawv no siv cov txheej txheem flexographic phaj ua piv txwv rau cov lus qhia luv luv.
Cov txheej txheem khiav ntawm flexographic phaj ua yog raws li nram no: thawj cov ntawv sau- zaj duab xis (tsis zoo zaj duab xis)- raug- yaug- ziab- ncej{{5 }}kev ua haujlwm.
1. original. Tus tsim qauv tsim nyog rau flexographic luam ntawv yuav tsum muaj cov yam ntxwv hauv qab no: ntau xim. Tab sis qhov overprinting tsawg dua; nws tsis tas yuav tsim cov ntsiab lus me me tshwj xeeb; lub network cable tsis siab dhau, tab sis cov xim luam ntawv tuaj yeem ua tiav; nws tuaj yeem ntim hauv online.
2. Zaj duab xis (qhov chaw mos zaj duab xis). Nws ua tau raws li cov kev xav tau ntawm kev ua phaj, nrog cov duab meej thiab cov ntawv, thiab qhov tseeb qhov loj me thiab qhov tshwj xeeb; siv cov yeeb yaj kiab frosted, plaub fab ntawm cov yeeb yaj kiab yuav tsum muaj tib qhov ntom ntom; siv tshuaj yeeb yaj kiab orthography; siv lub kis densitometer, qhov dawb theem ceev yog qis dua 0.06; dub theem ceev yog siab tshaj 3.5.
3. Kev nthuav tawm suav nrog kev raug rov qab thiab qhov tshwm sim loj.
① Back exposure. The photosensitive resin plate with the support film up and the protective film down is laid flat in the exposure drawer for exposure. Ultraviolet light penetrates the support film to cure the photosensitive adhesive layer. In order to establish a stable base, it can also control the depth of plate washing and strengthen the bonding force between the support film and the photosensitive resin layer. The back exposure time is determined according to the desired substrate thickness.
②Main exposure. Also known as front exposure, the photosensitive resin plate support film faces down and the protective film faces up. Tiled in the exposure drawer. Tear off the protective film once in a row, and then stick the film surface on the photosensitive resin plate. The inspection method of the vacuum film is covered on the film (non-drug film is evacuated, so that the film and the photosensitive resin layer are closely attached. The ultraviolet rays pass through the vacuum film and the light-transmitting part of the film to make the plate photosensitive Partial polymerization and curing. The length of the main exposure time is determined by the type of plate material and the strength of the light source. If the exposure time is too short, the gradient of the graphics and text will be too straight, the lines will be curved, and the small characters and small dots will be washed out. Otherwise, the exposure time will be too long. , the handwriting is blurred. If there are big, small, thick and thin lines on the same printing plate, it can be covered with black film and exposed separately according to the situation. The small part will not be lost due to washing, so as to ensure the quality of the printing plate.
4. yaug. Qhov tsis yog -photosensitive feem yog ntxuav thiab yaj, thiab cov photopolymerized nyem yog khaws cia. Qhov ntev ntawm lub phaj ntxuav lub sij hawm yog txiav txim siab raws li lub thickness ntawm lub phaj luam ntawv thiab qhov tob ntawm cov qauv luam ntawv. Yog tias lub sijhawm ntxhua khaub ncaws luv dhau, cov khoom siv tsis zoo yuav raug tso rau ntawm lub phaj thiab cuam tshuam rau qhov tob ntawm lub phaj ua. poob tawm.
5. ziab. Tshem lub phaj ntxuav cov kuab tshuaj kom rov qab kho lub phaj kom nws qhov loj thiab tuab. Qhov kub ntawm qhov ci yog li ntawm 50-60 degrees. Lub sij hawm ci yog txiav txim siab raws li lub thickness ntawm lub phaj thiab qhov ntev ntawm lub sij hawm ntxuav, feem ntau yog ob teev rau lub phaj tuab thiab ib teev rau lub phaj nyias. Yog tias lub sij hawm ci ntev dhau lawm thiab qhov kub ntawm qhov ci siab dhau lawm, lub phaj luam ntawv yuav ua nkig thiab cuam tshuam rau lub neej luam ntawv. Yog tias qhov ci ci qis dhau, lub sij hawm ziab yuav ntev, thiab yog tias lub sij hawm ci yog luv heev, yuav muaj cov rotten version thaum luam ntawv.
6. post-processing. That is, de-sticking and post-exposure. Make the photosensitive resin completely harden (polymerize) to achieve the proper hardness index, and eliminate the viscosity of the printing plate, so as to facilitate the transfer of ink. The post-processing time is obtained from the test, and the purpose is to not crack or stick.
