Cov Mechanics ntawm Offset Printing Machines: Nkag siab cov txheej txheem

Kev luam ntawv tau los ntev txij li nws pib, nrog ntau txoj kev luam ntawv tau tsim thiab txhim kho ntau xyoo. Ntawm cov txheej txheem no, offset printing tau tshwm sim los ua ib qho ntawm cov txheej txheem nrov tshaj plaws thiab siv dav. Offset tshuab luam ntawv tau hloov pauv ntau lawm, ua rau nws muaj peev xwm luam tawm cov ntawv loj loj ntawm cov ntawv luam tawm sai thiab ua tau zoo. Nyob rau hauv tsab xov xwm no, peb yuav delve rau hauv lub mechanics ntawm offset printing tshuab, tshawb txog cov txheej txheem intricate uas yuav tshwm sim tom qab scenes.

Lub hauv paus ntawm Offset Printing Machine

Offset printing yog ib qho txheej txheem uas cuam tshuam txog kev xa cov duab los ntawm lub phaj mus rau ib daim pam roj hmab ua ntej nws thaum kawg hloov mus rau qhov chaw luam ntawv. Nws yog raws li lub hauv paus ntsiab lus ntawm repulsion ntawm cov roj thiab dej, nrog rau cov duab cheeb tsam attracting number case thiab cov tsis-duab thaj chaw repelling nws. Offset tshuab luam ntawv siv cov txheej txheem nyuaj thiab cov khoom siv kom ua tiav cov txheej txheem no.

Cov khoom tseem ceeb ntawm lub tshuab luam ntawv offset muaj xws li phaj lub tog raj kheej, daim pam lub tog raj kheej, thiab lub tog raj kheej kheej kheej. Cov thooj voos kheej kheej no ua haujlwm ua ke los xyuas kom meej tus lej hloov pauv thiab luam tawm duab. Lub phaj lub tog raj kheej tuav lub phaj luam ntawv, uas muaj cov duab los luam tawm. Daim pam lub tog raj kheej muaj ib daim pam roj hmab nyob ib ncig ntawm nws, uas tau txais tus cwj mem los ntawm lub phaj thiab hloov mus rau daim ntawv lossis lwm yam luam ntawv substrate. Thaum kawg, lub tswv yim lub tog raj kheej siv lub siab rau daim ntawv los yog substrate, kom ntseeg tau tias ib qho zoo ib yam thiab txawm hloov ntawm daim duab.

Lub Inking System

Ib qho tseem ceeb tshaj plaws ntawm lub tshuab luam ntawv offset yog nws cov inking system. Lub inking system muaj ib tug series ntawm rollers, txhua tus muaj ib tug tshwj xeeb muaj nuj nqi. Cov chais no yog lub luag hauj lwm rau kev xa cov number case los ntawm tus ciav dej mus rau lub phaj thiab tom qab ntawd mus rau hauv daim pam.

Lub tshuab luam ntawv yog ib lub pas dej uas tuav tus cwj mem, uas tom qab ntawd xa mus rau tus number case rollers. Cov cwj mem chais yog nyob rau hauv kev sib cuag ncaj qha nrog tus ciav cov menyuam, tuaj tos tus cwj mem thiab xa mus rau cov tub ntxhais kawm ntawv. Los ntawm cov ductor roller, tus number case yog pauv mus rau lub phaj cylinder, qhov twg nws yog siv rau cov duab. Tus number case ntau dhau raug tshem tawm los ntawm cov txheej txheem oscillating rollers, kom ntseeg tau tias tus lej raug thiab tswj tau siv rau lub phaj.

Phaj thiab daim pam Cylinder

Lub phaj cylinder thiab daim pam lub tog raj kheej ua lub luag haujlwm tseem ceeb hauv cov txheej txheem luam ntawv offset. Lub tog raj kheej phaj tuav lub phaj luam ntawv, uas feem ntau yog ua los ntawm txhuas lossis polyester. Hauv cov tshuab luam ntawv offset niaj hnub no, cov phaj feem ntau yog lub tshuab computer-to-phaj (CTP) daim hlau, uas yog duab ncaj qha siv lasers lossis inkjet technology.

Lub phaj lub tog raj kheej tig, tso cai rau lub phaj tuaj rau hauv kev sib cuag nrog tus number case rollers thiab hloov tus number case mus rau daim pam lub tog raj kheej. Raws li lub phaj lub tog raj kheej tig, tus number case yog attracted rau cov duab cheeb tsam ntawm lub phaj, uas tau raug kho kom hydrophilic los yog number case-receptive. Qhov chaw tsis yog duab, ntawm qhov tod tes, yog hydrophobic lossis ink-repellent, kom ntseeg tau tias tsuas yog cov duab xav tau raug xa mus.

Daim pam lub tog raj kheej, raws li nws lub npe qhia, yog npog nrog ib daim pam roj hmab. Daim pam ua haujlwm ua ib tus neeg nruab nrab ntawm lub phaj thiab daim ntawv lossis lwm yam luam ntawv substrate. Nws tau txais tus cwj mem los ntawm lub phaj lub tog raj kheej thiab hloov mus rau hauv daim ntawv, kom ntseeg tau tias cov duab hloov mus kom huv thiab zoo ib yam.

Lub tog raj kheej Impression

Lub impression cylinder yog lub luag haujlwm rau kev siv lub siab rau daim ntawv los yog substrate, kom ntseeg tau tias cov duab raug xa mus. Nws ua haujlwm ua ke nrog daim pam lub tog raj kheej, tsim kom muaj kev teeb tsa zoo li sandwich. Raws li daim pam lub tog raj kheej hloov tus cwj mem mus rau daim ntawv, lub tswv yim lub tog raj kheej siv lub siab, tso cai rau tus number case los ntawm daim ntawv fibers.

Lub tswv yim lub tog raj kheej feem ntau yog ua los ntawm cov hlau los yog lwm yam khoom siv khov kho kom tiv taus lub siab thiab muab kev xav zoo ib yam. Nws yog ib qho tseem ceeb rau lub impression cylinder kom siv lub siab npaum li cas los xyuas kom meej cov duab xa mus tsis muaj kev puas tsuaj rau daim ntawv los yog substrate.

Txheej txheem luam ntawv

Nkag siab txog kev siv tshuab ntawm lub tshuab luam ntawv offset tsis tiav yam tsis muaj delving rau hauv cov txheej txheem luam ntawv nws tus kheej. Thaum tus number case tau siv rau hauv daim pam lub tog raj kheej, nws yog npaj txhij mus rau hauv daim ntawv los yog substrate.

Raws li daim ntawv hla dhau ntawm lub tshuab luam ntawv, nws los ntawm kev sib cuag nrog daim pam lub tog raj kheej. Cov duab yog pauv mus rau daim ntawv los ntawm kev sib xyaw ua ke ntawm kev siab, number case, thiab absorbency ntawm daim ntawv nws tus kheej. Daim pam lub tog raj kheej tig rau hauv sync nrog daim ntawv, xyuas kom meej tias tag nrho saum npoo yog npog nrog daim duab.

Cov txheej txheem luam ntawv offset tsim cov ntawv luam tawm ntse thiab huv, ua tsaug rau nws lub peev xwm los tswj cov txheej txheem luam ntawv zoo ib yam thoob plaws hauv cov txheej txheem luam ntawv. Qhov no ua rau cov xim zoo nkauj, cov ntsiab lus zoo, thiab cov ntawv ntse, ua rau cov ntawv luam tawm uas nyiam rau ntau daim ntawv thov, suav nrog cov ntawv xov xwm, ntawv qhia, thiab cov khoom ntim.

Hauv Summary

Offset tshuab luam ntawv tau hloov pauv kev lag luam luam tawm, tso cai rau kev tsim khoom loj ntawm cov ntawv luam tawm zoo nrog qhov tseeb tshwj xeeb thiab kev ua haujlwm zoo. Cov kws kho tsheb tom qab cov tshuab no koom nrog kev sib cuam tshuam ntawm ntau yam khoom, suav nrog lub phaj lub tog raj kheej, daim pam lub tog raj kheej, thiab lub tog raj kheej kheej kheej. Lub inking system ua kom paub meej qhov hloov pauv ntawm tus number case rau lub phaj thiab daim pam, thaum cov txheej txheem luam ntawv nws tus kheej tau lees tias huv thiab zoo ib yam duab luam tawm.

Kev nkag siab txog cov tshuab luam ntawv ntawm offset tshuab luam ntawv muab kev nkag siab zoo rau hauv cov txheej txheem luam ntawv, ua rau ob tus kws tshaj lij thiab cov neeg nyiam txaus siab rau kev kos duab thiab kev tshawb fawb hauv qab no zoo kawg nkaus thev naus laus zis. Raws li kev luam ntawv thev naus laus zis txuas ntxiv mus, kev luam ntawv offset tseem yog ib txoj hauv kev ruaj khov thiab txhim khu kev qha, txhawb nqa ntau yam kev lag luam thoob plaws ntiaj teb.