Clúdaíonn priontáil lipéad roinnt príomh-mhodhanna priontála, sa chéim déanta pláta. De réir nádúr na dtáirgí éagsúla, roghnaítear modhanna priontála éagsúla, agus tá an próiseas déanta pláta difriúil freisin le haghaidh modhanna priontála éagsúla. Glacann an páipéar seo an próiseas déanta plátaí solúbtha mar shampla le haghaidh réamhrá gairid.
Is é seo a leanas an sreabhadh próisis maidir le déanamh plátaí solúbtha: bunlámhscríbhinn-scannán (scannán diúltach)-nochtadh-rannadh-triomú-phostáil{{5} }}próiseáil.
1. bunaidh. Ba cheart go mbeadh na tréithe seo a leanas ag an dearadh bunaidh atá oiriúnach le haghaidh priontála flexographic: líon mór dathanna. Ach is lú an róphriontáil; ní gá sonraí fíorbheaga a atáirgeadh; níl an cábla líonra ró-ard, ach is féidir an éifeacht priontála dath a bhaint amach; is féidir é a phacáistiú ar líne.
2. Scannán (scannán faighne). Buaileann sé le riachtanais pláta a dhéanamh, le pictiúir agus téacsanna soiléire, agus sonraíochtaí cruinn agus méid; ag baint úsáide as scannán frosted, is gá go mbeadh an dlús céanna ag ceithre choirnéal an scannáin; ag baint úsáide as an ortagrafaíocht scannáin drugaí; ag baint úsáide as densitometer tarchurtha, tá an dlús leibhéal bán faoi 0.06; tá an dlús leibhéal dubh os cionn 3.5.
3. Cuimsíonn nochtadh cúl-nochtadh agus príomh-nochtadh.
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. sruthlaigh. Déantar an chuid neamh-fhóta-íogair a ní agus a thuaslagadh, agus caomhnaítear an faoiseamh fóta-pholaiméirithe. Déantar fad an t-am níocháin pláta a chinneadh de réir thiús an phláta priontála agus doimhneacht an phhatrún priontála. Má tá an t-am níocháin ró-ghearr, fágfar an roisín unphotosensitive ar an pláta agus beidh tionchar aige ar dhoimhneacht an phláta. titim de.
5. triomú. Bain an tuaslagóir níocháin pláta chun an pláta a chur ar ais chuig a mhéid agus a thiús bunaidh. Tá an teocht bácála idir 50-60 céim. Déantar an t-am bácála a chinneadh de réir thiús an phláta agus fad an ama níocháin, go ginearálta dhá uair an chloig le haghaidh an pláta tiubh agus uair an chloig le haghaidh an pláta tanaí. Má tá an t-am bácála ró-fhada agus an teocht bácála ró-ard, beidh an pláta priontála brittle agus beidh tionchar aige ar an saol priontála. Má tá an teocht bácála ró-íseal, déanfar an t-am a thriomú a shíneadh, agus má tá an t-am bácála ró-ghearr, beidh leagan rotten le linn priontála.
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.
