Txoj kev txhim kho rau flatness ntawm corrugated board ntawv

Cov tsos ntawm corrugated board nrog tsis zoo flatness yuav muab faib ua peb hom: transverse arch, longitudinal arch thiab arbitrary arch.
Transverse arch yog hais txog lub koov tsim raws corrugated kev taw qhia. Longitudinal arch yog hais txog lub koov uas tsim los ntawm cov ntaub ntawv raws li kev ceev ntawm cov kab ntau lawm. Lub arbitrary arch yog ib qho arch uas fluctuates raws txhua txoj kev. Lub koov nyob rau saum npoo ntawm daim ntawv yog hu ua zoo arch, uas nyob rau saum npoo ntawm daim ntawv sab hauv yog hu ua tsis zoo arch, thiab hais tias nyob rau saum npoo ntawm daim ntawv muaj ups thiab downs yog hu ua zoo thiab tsis zoo arch.
Cov yam tseem ceeb cuam tshuam rau qhov flatness ntawm daim ntawv
1. Muaj ntau hom thiab qib ntawm daim ntawv sab hauv. Muaj cov ntawv kraft txawv teb chaws thiab txawv teb chaws, imitation kraft ntawv, corrugated ntawv, tshuaj yej board ntawv, high-strength corrugated ntawv, thiab hais txog, thiab muab faib ua a, B, C, D, e, qib. Raws li qhov sib txawv ntawm cov ntaub ntawv, cov ntawv saum npoo zoo dua li cov ntawv sab hauv.
2. Cov txheej txheem tseem ceeb ntawm cov ntawv sab hauv yog txawv. Raws li kev xav tau ntawm kev ua haujlwm ntawm cov thawv lossis cov nqi txo cov neeg siv khoom, cov ntawv hauv cov thawv yuav tsum sib txawv.
(1) Tus nqi ntawm daim ntawv sab hauv yog txawv. Ib txhia ntawm cov ntaub ntawv saum toj kawg nkaus yog loj dua sab hauv, thiab ib txhia yog me me.
(2) Cov dej noo ntawm daim ntawv nyob rau hauv lub ntsej muag daim ntawv yog txawv. Vim muaj qhov sib txawv ntawm cov av noo ntawm tus neeg xa khoom, kev thauj mus los thiab cov khoom muag, cov dej noo ntawm cov ntawv saum npoo yog siab dua li ntawm cov ntawv sab hauv, thiab kuj muaj qee qhov me me.
(3) Cov ntawv hnyav thiab cov dej noo sib txawv. Ua ntej, daim ntawv saum npoo yog loj dua cov ntawv sab hauv, thiab cov ntsiab lus noo noo ntau dua lossis tsawg dua li ntawm cov ntawv sab hauv. Qhov thib ob, qhov hnyav ntawm daim ntawv yog tsawg dua li cov ntawv sab hauv, cov ntsiab lus noo noo ntau dua cov ntawv sab hauv lossis tsawg dua cov ntawv sab hauv.
3. Cov dej noo ntawm tib batch ntawm daim ntawv yog txawv. Cov dej noo ntawm ib feem ntawm daim ntawv yog siab dua li ntawm lwm qhov ntawm daim ntawv lossis lub tog raj kheej ntawv, thiab cov ntsiab lus noo noo ntawm sab ntug thiab sab hauv cov tub ntxhais yog txawv.
4. Qhov ntev ntawm cov cua sov saum npoo ( qhwv lub kaum sab xis) ntawm daim ntawv dhau los ntawm cov khoom siv hluav taws xob tsis raug xaiv thiab hloov kho, lossis qhov ntev ntawm cov cua sov saum npoo (wrapping lub kaum sab xis) tsis tuaj yeem hloov kho arbitrarily. Qhov qub vim yog kev ua haujlwm tsis raug, qhov kawg vim muaj kev txwv cov khoom siv, cuam tshuam rau preheating thiab ziab nyhuv.
5, nws tsis tuaj yeem siv cov cuab yeej tshuaj tua kab lossis cov cuab yeej tsis muaj cov cuab yeej tshuaj tsuag kom zoo, kom cov av noo ntawm daim ntawv tsis tuaj yeem nce ntxiv arbitrarily.
6. Lub sij hawm ntawm kev ya raws tom qab preheating tsis txaus, los yog ib puag ncig cov av noo loj, qhov cua tsis zoo, thiab cov kab ntau lawm yog qhov tsis tsim nyog.
7. Ib sab corrugating tshuab, kua nplaum tshuab ntawm tus nqi ntawm qhov tsis tsim nyog, tsis sib xws, thiab kev taw qhia ntawm daim ntawv shrinkage tsis sib xws.
8. Tsis txaus thiab tsis ruaj tsis khov chav siab, chav ntxiab thiab lwm yam khoom siv puas tsuaj lossis cov yeeb nkab dej tsis ntws, ua rau lub cev ua haujlwm thiab ruaj khov ntawm preheater.

Raws li qhov teeb meem ntawm yuav ua li cas txhawm rau txhim kho qhov flatness ntawm daim ntawv, cov khoom siv lub cev, cov txheej txheem cov cuab yeej thiab lwm yam muaj feem xyuam thiab cov kev txwv ntawm ntau cov ntawv siv feem ntau raug kuaj thiab ntsuas luv luv.
(1) Tib hom ntawv kom muaj nuj nqis nce, shrinkage me ntsis txo. Kev sib raug zoo ntawm cov khoom noj khoom haus, cov ntsiab lus noo noo thiab shrinkage ntawm ib co ntaub ntawv kraft imported, domestic kraft ntawv, tshuaj yej board ntawv thiab siab zog corrugated ntawv tau kawm.
(2) Lub zog siab muab los ntawm corrugated board ntau lawm kab yog ncaj qha proportional rau qhov kub thiab txias ntawm preheater. Qhov siab dua qhov cua siab. Qhov siab dua qhov kub ntawm lub preheater yog.
(3) Cov ntawv uas muaj qhov loj thiab cov dej noo siab yog qeeb rau preheat thiab qhuav, txwv tsis pub nws yog ceev. Daim ntawv nrog qhov hnyav sib txawv thiab cov ntsiab lus noo noo yog preheated thiab qhuav ntawm cov cua siab 1.0mpa / cm2 (172 ℃) preheater.
(4) Qhov ntev ntawm qhov cua sov qhov ntev (lub kaum sab xis) yog, qhov qis dua cov ntsiab lus noo noo yog. Kev sib raug zoo ntawm qhov ntev ntawm cov cua sov saum npoo thiab cov ntsiab lus noo noo tom qab ziab ntawm cov ntawv sib txawv nrog cov dej noo ntawm 10% ntawm 172 ℃ thiab cov kab ntau lawm ceev ntawm 0.83 M / s.
(5) Tom qab preheating, noo noo cov ntsiab lus ntawm ib sab corrugated ntawv yog qeeb, thiab rov qab hmoov ntawm kiv cua qhov cua yog ceev. Cov dej noo ntawm 220g / m2 thiab 150g / m2 ib sab corrugated ntawv yog 13% tom qab preheated ntawm 172 ℃. Nyob rau hauv ib puag ncig ntawm 20 ℃ thiab 65% av noo nyob rau hauv tsev xog paj, qhov ceev ntawm ntuj ya raws emission yog piv nrog cov kiv cua qhov cua.

Cov txiaj ntsig ntawm qhov ntsuas saum toj no qhia tau tias qhov shrinkage ntawm daim ntawv sib txawv nrog cov ntawv sib txawv thiab cov ntsiab lus noo noo, uas yog ib qho tseem ceeb ntawm lub cev ntawm daim ntawv. Nrog tib cov ntaub ntawv, cov ntawv ntawv yog ib qho yooj yim kom ua tau zoo flatness. Qhov ntxeev yog qhov nyuaj. Nws yog ib qho tsim nyog yuav tau xav txog cov kev hloov pauv ntawm tsib yam tseem ceeb saum toj no thiab ua kom haum rau kev hloov kho. Qhov zoo los yog phem flatness nyob ntawm tus nqi shrinkage ntawm txhua txheej ntawm daim ntawv. Txhawm rau ua kom cov ntawv ntawv muaj qhov flatness zoo dua, tus nqi shrinkage ntawm txhua txheej ntawm daim ntawv yuav tsum yog tib yam, ntawm qhov tseem ceeb tshaj plaws yog cov ntawv sab hauv. Lub shrinkage tus nqi ntawm daim ntawv pem hauv ntej yog me dua li ntawm cov ntawv puab, thiab nws yog zoo arched, txwv tsis pub nws yog tsis zoo arch. Yog hais tias tus nqi shrinkage ntawm daim ntawv sab hauv tsis sib npaug, nws yuav dhau los ua qhov zoo thiab qhov tsis zoo. Los ntawm kev txheeb xyuas cov txheej txheem tsim ntawm cov ntawv ntawv hauv cov kab ntau lawm, kev tswj cov shrinkage tuaj yeem muab faib ua ob theem.
(1) The formation stage of corrugation. Qhov ntawd yog hais tias, cov txheej txheem los ntawm kev pub mis mus rau theem nrab gluing yog theem tseem ceeb los tswj kev shrinkage. Raws li qhov teeb meem tiag tiag ntawm daim ntawv, chav siab, qhov kub thiab txias ntawm txhua txheej ntawm cov nplais, qhov tsis muaj qhov kub thiab txias, qhov ntev ntawm cov cua sov, nrog rau qhov ntev ntawm cov cua sov saum npoo, cov dej faib tawm Qhov cua tshuab, cov tshuaj tsuag tsuag, qhov ntau ntawm gluing thiab cov kev tsis sib xws ntawm cov kab ntau lawm ceev teeb raug xaiv raws li, yog li ntawd txhua txheej ntawm daim ntawv tuaj yeem tau txais kev cog lus ywj pheej los ntawm kev tswj cov txheej txheem kom zoo thiab ua tau zoo, thiab qhov kawg shrinkage tus nqi yog qhov zoo ib yam.
(2) Paperboard ua theem. Ntawd yog, qhov thib ob gluing rau cov txheej txheem tom ntej ntawm kev sib txuas, ziab thiab ironing. Nyob rau lub sijhawm no, txhua txheej ntawm daim ntawv tuaj yeem tsis tuaj yeem thim tau yooj yim dua, thiab qhov shrinkage ntawm txhua txheej ntawm daim ntawv raug txwv los ntawm ib leeg tom qab muab khi rau hauv daim ntawv. Qhov taw tes sib txuas tuaj yeem hais tau tias yog qhov pib ntawm daim ntawv arch. Nws yog ib qho tsim nyog los xaiv thiab kho cov txheej txheem, xws li cov kua nplaum, ziab phaj kub, cov kab ntau lawm, thiab lwm yam, kom tswj tau qhov sib txawv ntawm shrinkage tus nqi mus rau qhov tsawg kawg nkaus, thiab hlau lub koov cov duab uas ua los ntawm daim ntawv kom deb li deb tau. .

Ua ntej, nws yuav tsum tau hais tias cov ntawv hauv paus muab los ntawm tus neeg muag khoom yuav tsum muaj cov khoom tsim nyog thiab ruaj khov thiab cov ntsiab lus noo noo. Thaum lub sij hawm kev thauj mus los thiab kev thauj khoom thiab thauj khoom, nws yuav tsum ua kom cov av noo ib puag ncig tsis tu ncua thaum khaws cia hauv lub hoobkas.
Lwm qhov yog siv tib hom ntawv lossis ntawv nrog tib qhov kom muaj nuj nqis, cov ntsiab lus noo noo thiab qib kom ntau li ntau tau.
Qhov peb yog tias qhov ntev ntawm cov cua sov saum npoo (wrapping lub kaum sab xis) ntawm lub rhaub dej preheated nrog cov dej noo loj yog nce, kiv cua yog qhov cua, lub sij hawm xa dej tau nce, qhov ceev ntawm cov kab ntau lawm yog qeeb, thiab cov noo noo cov ntsiab lus ntawm daim ntawv yog txo los ntawm qhov ntev ntawm lub cua sov saum npoo ntawm lub preheater, lub ntuj cua thiab chav tshuaj tsuag yog siv los ua kom cov kab ntau lawm.
Plaub, txhua txheej ntawm daim ntawv ntawm tus nqi ntawm cov kua nplaum kom zoo ib yam, raws li corrugated kev taw qhia ntawm tag nrho cov dav ntawm uniform thiab nruab nrab tus nqi.
Thib tsib, cov huab cua siab ruaj khov, thiab cov dej ntws tawm thiab lwm cov yeeb nkab fittings tswj kev ua haujlwm zoo.
Muaj ntau yam uas cuam tshuam rau qhov flatness ntawm corrugated board. Cov yam ntxwv ntawm flatness hloov nrog ib leeg. Kev txhim kho yuav tsum tau ua raws li cov xwm txheej hauv zos thiab cov phiaj xwm, thiab qhov kev tsis sib haum xeeb tseem ceeb yuav tsum tau tuav thiab daws. Cov hauv qab no yog cov teeb meem tshwm sim hauv kev tsim ib thiab ob chav corrugated paperboard hauv peb lub Hoobkas, piv txwv li.

Nws paub tias: daim ntawv saum toj kawg nkaus yog 250G / m2 qib 2A kraft ntawv nrog cov dej noo ntawm 7.7%; pobzeb ntawv yog 150g / m2 domestic siab zog corrugated ntawv nrog noo noo cov ntsiab lus ntawm 10%; daim ntawv sab hauv yog 250G / m2 qib 2B kraft ntawv nrog cov ntsiab lus noo ntawm 14%; huab cua siab ntawm 1.1mpa / cm2 ntau lawm kab ceev ntawm 60m / min. Txoj kev txhim kho:
(1) Qhov ntev ntawm cov ntaub ntawv (clip) daim ntawv hla lub tshav kub ntawm lub preheater (wrap lub kaum sab xis) yog nce los ntawm 1 mus rau 1.6 npaug thiab 0.5 mus rau 1.1 zaug feem.
(2) Qhov nruab nrab ceev qhov cua ntawm 0.9Kw hluav taws xob kiv cua yog saws nyob rau hauv txoj hauj lwm txav ntawm ob sab (clip) pobzeb kab ntawm tus choj ntawm cov kab ntau lawm, thiab lub qhov rais ntawm lub rooj cob qhia tau qhib rau qhov cua.
(3) ib qho me me ntawm cov tshuaj tsuag rau ntawm cov ntaub so ntswg.
(4) Qhov ceev ntawm cov kab ntau lawm yog txo kom txog li 50M / min.
Raws li cov kev xaiv saum toj no, tus thawj transverse koov tuaj yeem ploj mus.
Paperboard yog tsis zoo arched los ntawm longitudinal kev taw qhia
Txoj kev txhim kho:
(1) Nyob rau hauv pem hauv ntej ntawm peb-txheej tso cua sov, lub zog tsis kam ntawm daim ntaub so ntswg yog nce, thiab rotary braking quab yuam ntawm lub tog raj kheej ntawv yog nce.
(2) Cov kev taw qhia lub log thiab nro lub log nyob rau hauv pem hauv ntej ntawm peb-txheej tso cua sov kom txo tau cov lus tsa suab tsis kam.
Tom qab kev kho kom raug, tus thawj longitudinal arch yuav ploj mus.

Nws paub tias daim ntawv sab saum toj yog 200g / m2 qib 2B imitation kraft ntawv, cov ntsiab lus noo noo yog 8%, cua siab yog 1.0mpa / cm2, thiab cov kab ntau lawm ceev yog 50M / min. Txoj kev txhim kho:
(1) Qhov ntev ntawm qhov chaw (sandwich) daim ntawv hla lub tshav kub ntawm lub preheater yog nce los ntawm 0.9 mus rau 1.4 thiab 0.6 mus rau 1.12 zaug feem.
(2) cov ntaub ntawv hauv ob sab yuav txo qhov ntev ntawm cov cua sov saum npoo ntawm lub preheater lossis siv cov tshuaj tsuag me me.
(3) Qhov ceev ntawm cov kab ntau lawm tau nce mus txog 60m / min.
Paperboard yog qhov tsis zoo arch nyob rau hauv longitudinal kev taw qhia
Txoj kev txhim kho:
(1) Daim ntawv nyob rau hauv pem hauv ntej ntawm peb-txheej preheater txo qhov txav tsis kam thiab lub zog nres ntawm lub tog raj kheej daim ntawv.
(2) Daim ntawv qhia lub log thiab nro lub log ntawm cov ntawv hauv ob sab hauv pem hauv ntej ntawm peb txheej preheater ua rau kom lub zog ua haujlwm. Tom qab kev kho kom raug, tus thawj longitudinal arch yuav ploj mus.

Nws paub tias: daim ntawv saum toj kawg nkaus yog 200g / M2b kraft ntawv, cov ntsiab lus noo noo yog 13%; daim ntawv (clip) pobzeb ntawv yog 150g / M2 siab zog corrugated ntawv nrog noo noo cov ntsiab lus ntawm 10%; cov ntawv sab hauv yog ua los ntawm 200g / M2b qib imitation kraft ntawv nrog cov ntsiab lus noo ntawm 8%; huab cua siab yog 1.0mpa / cm2; cov kab ntau lawm ceev yog 50M / min. Txoj kev txhim kho:
(1) Qhov ntev ntawm qhov chaw (sandwich) daim ntawv dhau los ntawm cov cua sov saum npoo ntawm preheater yog nce los ntawm 0.9 mus rau 1.4 thiab 0.6 mus rau 1.1 zaug feem.
(2) cov ntaub ntawv hauv ob sab yuav txo qhov ntev ntawm cov cua sov saum npoo ntawm lub preheater lossis siv cov tshuaj tsuag me me.
(3) Cov kab ntau lawm ceev tau nce mus txog 60m / min.
Paperboard yog qhov tsis zoo arch nyob rau hauv longitudinal kev taw qhia
Txoj kev txhim kho:
(1) Daim ntawv nyob rau hauv pem hauv ntej ntawm peb-txheej preheater txo qhov txav tsis kam thiab lub zog nres ntawm lub tog raj kheej daim ntawv.
(2) Cov kev nro ntawm Liwa kab nyob rau hauv pem hauv ntej ntawm peb-txheej preheater tsub kom lub zog tsis kam.
Cardboard yog nyob rau hauv ib tug zoo thiab tsis zoo arch
Muaj ob yam zoo thiab tsis zoo arches, thiab txoj kev txhim kho yog txawv. Ntawm no peb tsuas piav qhia txog qhov sib txawv transverse zoo thiab tsis zoo arches.