Taw qhia rau Daim Ntawv Ua Tshuab
Koj puas tau xav paub tias daim ntawv ua li cas? Kev ua ntawv yog txheej txheem nyuaj uas muaj ntau theem ntawm kev npaj ua ntej cov khoom kawg tau txais. Thaum cov theem pib koom nrog kev siv cov khoom siv raw xws li ntoo pulp, cov theem kawg yog nqa tawm siv cov ntawv ua tshuab. Hauv tsab xov xwm no, peb tshawb nrhiav cov tshuab ua ntawv thiab lawv lub luag haujlwm hauv cov txheej txheem ua ntawv.
Daim Ntawv Ua Tshuab hu ua dab tsi?
Cov tshuab ua ntawv feem ntau hu ua ntawv tshuab. Cov tshuab no yog siv los tsim cov ntawv thiab ntawv cov khoom lag luam zoo thiab ntau ntau. Lub sij hawm "paper tshuab" yog muab los ntawm qhov tseeb hais tias cov cav tov yog siv los ua ntawv, uas yog ib tug nyias, ca cov ntaub ntawv uas ua los ntawm fibers.
Hom Ntawv Tshuab
Muaj ntau ntau hom ntawv tshuab, nrog rau txhua hom tau ua kom zoo rau ib qho tshwj xeeb ntawm kev ua ntawv. Nov yog qee yam tseem ceeb ntawm cov tshuab ntawv:
1. Foursdrinier Tshuab - Qhov no yog hom ntawv siv dav tshaj plaws. Nws yog lub npe hu ua Henry Foursdrinier, uas tau tsim lub tshuab thaum xyoo pua 19th. Lub tshuab Foursdrinier yog siv los tsim ntau yam khoom ntawm cov ntawv, los ntawm cov ntawv luam tawm mus rau cov khoom ntim.
2. Lub tog raj kheej Tshuab - Lub tshuab no yog siv los tsim cov ntawv du, xws li ntawv sau. Nws muaj ib tug cylindrical hlau mesh uas tig nyob rau hauv ib lub vat ntawm pulp, cia dej ntws tawm ntawm lub pulp thiab tawm hauv qab fibers.
3. Tissue Machine - Lub tshuab no yog siv los tsim cov ntaub so ntswg thiab cov ntaub so quav. Nws muaj lub tshuab nqus tsev vacuum uas tsim lub tshuab nqus tsev, tso cai rau kom qhuav ntawm daim ntawv sai dua thiab zoo dua.
4. Crescent Former Machine - Lub tshuab no yog siv los tsim cov ntaub so ntswg. Nws siv lub crescent-shaped qub los tsim cov ntawv.
Cheebtsam ntawm ib lub tshuab ntawv
Lub tshuab ntawv yog tsim los ntawm ntau qhov chaw uas ua haujlwm ua ke los tsim cov khoom kawg. Nov yog qee qhov tseem ceeb ntawm lub tshuab ntawv:
1. Headbox – Qhov no yog cov khoom uas muab cov ntaub so ntswg rau lub tshuab ntawv. Nws faib cov pulp sib npaug mus rau cov hlau mesh.
2. Hlau Mesh - Qhov no yog qhov chaw ntawm daim ntawv tsim. Nws yog ib lub voj nruam ntawm hlau mesh uas tig los ntawm ntau theem ntawm cov txheej txheem ua ntawv.
3. Xovxwm Ntu - Qhov no yog seem uas daim ntawv yog nias kom tshem tawm cov dej ntau dhau. Cov ntu xovxwm muaj ob peb lub rollers uas siv lub siab rau daim ntawv thaum nws hla dhau.
4. Ntu Tshuab ziab khaub ncaws - Qhov no yog seem uas daim ntawv qhuav. Nws muaj ob peb txheej ntawm cov menyuam, txhua tus muaj qhov kub thiab txias dua li yav dhau los cov menyuam.
Txheej Txheem Ua Ntawv
Cov txheej txheem ua ntawv pib nrog kev npaj cov khoom siv raw. Cov ntaub ntawv raw rau kev ua ntawv yog feem ntau ntoo pulp, rag pulp, lossis cov ntawv siv dua. Thaum cov ntaub ntawv raw tau npaj lawm, lawv tau tov nrog dej los tsim cov pulp.
Tom qab ntawd lub pulp yog muab tso rau hauv lub taub hau ntawm lub tshuab ntawv, qhov chaw uas nws muab faib sib npaug rau cov hlau mesh. Raws li cov dej ntws tawm ntawm lub paj, cov fibers pib sib txuas ua ke, tsim ib daim ntawv.
Daim ntawv tom qab ntawd dhau los ntawm ntu xovxwm, qhov twg dej ntau dhau raug tshem tawm, thiab mus rau hauv lub tshuab ziab khaub ncaws, qhov twg nws qhuav. Tom qab daim ntawv tau qhuav lawm, nws raug mob mus rau ib lub reel thiab txiav rau hauv qhov loj me.
Xaus
Cov ntawv ua tshuab yog qhov tseem ceeb hauv cov txheej txheem ua ntawv. Yog tsis muaj cov tshuab no, nws yuav tsis yooj yim sua kom tsim cov ntawv zoo thiab ntau ntau. Txawm hais tias muaj ntau hom ntawv tshuab, txhua tus nrog nws tus kheej siv tshwj xeeb, cov khoom siv ntawm lub tshuab ntawv tseem zoo ib yam. Kev nkag siab txog cov tshuab ntawv thiab lawv lub luag haujlwm hauv cov txheej txheem ua ntawv tuaj yeem muab kev nkag siab txog qhov nyuaj ntawm kev ua ntawv.