Preheating Temperature Control Nyob rau hauv Fluidized txaj Dipping txheej txheem
Keeb Kwm Taw Qhia
Hauv cov txheej txheem dipping txaj fluidized , lub peev xwm cua sov ntawm cov khoom ua haujlwm yog siv los yaj cov hmoov thermoplastic thiab ua tiav qhov tuab thiab zoo ntawm cov txheej txheem xav tau. Yog li ntawd, kev txiav txim siab qhov kub ua ntej kom sov ntawm cov khoom ua haujlwm yog qhov tseem ceeb. Qhov kub ua ntej yuav tsum siab dua qhov kub yaj ntawm cov hmoov thermoplastic me ntsis. Yog tias nws siab dhau, qhov tsis zoo ntawm kev ntws yuav tshwm sim vim yog cov txheej tuab dhau lossis cov polymer resin tawg, ua rau muaj npuas, daj lossis hlawv. Ntawm qhov tod tes, yog tias nws qis dhau, kev yaj tsis txaus yuav ua rau cov txheej nyias nyias nrog qhov chaw pocking lossis tsis tiav uas ua tsis tau raws li lub hom phiaj dipping.
Feem ntau hais lus, qhov kub thiab txias ntawm lub workpiece yog cuam tshuam los ntawm cov khoom xws li nws cov khoom, qhov loj, cov duab, thermoplastic hmoov kev ua tau zoo, yuav tsum tau txheej thickness, lub sij hawm cua sov, thiab lub sij hawm dipping. Txawm li cas los xij, hauv kev ua haujlwm zoo, cov khoom siv sib txawv ntawm qhov tuab, qhov loj thiab cov duab, ua rau nws nyuaj rau kev txiav txim siab qhov kub ntawm preheating ntau npaum li cas.
Yuav kom paub txog qhov kub thiab txias ua ntej rau cov khoom ua haujlwm thaum lub sijhawm dipping hmoov fluidized bed , peb siv peb tus kheej tsim thiab tsim cov fluidized bed dipping system. Los ntawm kev sib txuas qhov no nrog peb cov kev paub hauv kev tsim ntau yam khoom xws li laj kab cais tsheb, vaj thiab lub tsev hauv nroog guardrail tiv thaiv nets, tub yees txee, khw muag khoom, yug me nyuam cage nets, springs, thiab steel kav dej siv ntau yam thermoplastic hmoov, cov kev sim muab lub hauv paus theoretical thiab txoj kev rau kev ua kom zoo dua ntawm cov txheej txheem dipping.
Txoj hauv kev sim
1.Sample Npaj
Cov qauv feem ntau muaj cov pas nrig-zoo li tus hlau, nrog rau qee qhov kuj ua los ntawm tooj liab thiab txhuas, muaj txoj kab uas hla 0.8, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0, 12.0, 14.0, , 16.0 Nws
2.Thermoplastic hmoov
LDPE thermoplastic hmoov feem ntau tau siv hauv kev sim, thaum PVC, PA, thiab lwm yam hmoov kuj raug kuaj.
3. Txheej txheem
Kev kho ua ntej → preheat → dipping hauv hmoov → tom qab cua sov (kho) → txias
4.Coating Quality
Sib txawv preheating kub tau ua hauj lwm rau immersing cov aforementioned qauv nyob rau hauv ntau yam thermoplastic hmoov; Tom qab cov txheej txheem kho qhov kub thiab txias qis, cov txheej txheem txheej txheej tau raug soj ntsuam thiab sau tseg hauv Table 1, Table 2, thiab Table 3.
Kev soj ntsuam ntawm cov xwm txheej cuam tshuam
Raws li cov txiaj ntsig kev sim thiab ua ke nrog cov ntaub ntawv qhia hauv Table 1, Table 2, thiab Table 3, ib qho nkhaus tau npaj los sawv cev rau qhov zoo tshaj plaws preheating kub tus nqi rau txhua tus qauv, raws li qhia hauv daim duab.
Kev cuam tshuam ntawm Thermoplastic Powder
Cov cua kub nkhaus ntawm lub workpiece sib txawv rau cov hmoov sib txawv, raws li tau piav qhia hauv daim duab saum toj no. Vim muaj ntau yam ntawm qhov muag muag (80 - 90 ℃) thiab melting point (105 - 130 ℃) ntawm polyethylene (PE), nrog rau qhov kub thiab txias ntawm 300 ℃, yuav tsum muaj qhov kub ua ntej ntau dua rau cov khoom ua haujlwm. Tsuas yog thaum rhuab ntawm qhov kub siab tshaj 360 ℃ rau ib lub sij hawm ntev yuav yellowing tshwm sim ntawm lub txheej.
Polyvinyl chloride (PVC) tsis muaj qhov sib txawv melting point tab sis pib softening ntawm 130 ℃ thiab tuaj yeem ntws ntawm 180 ℃. Nws pib decomposing saum 200 ℃, tso hydrogen chloride, pa luam yeeb, thiab emitting lub qhov ntswg tsw. Me ntsis nce nyob rau hauv qhov kub thiab txias los yog lub sij hawm raug ntev dua yuav ua rau yellowing thiab blackening ntawm txheej. Raws li PVC's melting kub yog ze rau nws decomposition kub, stricter tswj lub workpiece lub preheating kub yog tsim nyog.
Polyamide (PA) coatings (feem ntau nylon 1010, nylon 11, nylon 12) muaj qhov sib txawv ntawm 180 txog 230 ℃ thiab thermal decomposition kub tshaj 300 ℃; Txawm li cas los xij, qhov sib txawv ntawm lawv cov melting thiab decomposition kub tseem nqaim. Nylon dipping feem ntau yuav tsum tau ua kom txias, thiab tswj qhov kub ntawm preheating ua pov thawj nyuaj.
Kev cuam tshuam los ntawm Workpiece Thickness
Nyob rau hauv txoj kev xav, qhov kub ntawm qhov preheating ntawm lub workpiece yuav tsum yog me ntsis siab dua cov hmoov melting kub los pab kom cov hmoov curing thiab deposition ntawm cov hlau nto. Txawm li cas los xij, cov txiaj ntsig kev sim qhia tau hais tias muaj kev hloov pauv loj hauv preheating kub rau workpieces nrog txawv diameters thiab thicknesses. Qhov no yog vim muaj qhov muaj peev xwm ntawm cov cua sov loj ntawm cov khoom ua haujlwm tuab, uas cuam tshuam cov cua sov kom zoo tom qab cua sov thiab ua rau muaj qhov kub thiab txias hloov thaum hloov los ntawm qhov cub mus rau cov hmoov tank. Yog li ntawd, qhov kub preheating tsis tuaj yeem siv rau cov khoom ua haujlwm tuab dua; Hloov chaw, lawv yuav tsum tau ua kom sov ntawm qhov kub qis dua rau lub sijhawm ntev dua. Hloov pauv, cov khoom me me muaj peev xwm qis dua thiab ua kom sov sai sai, xav tau kev siv "cov nyhuv thermal poob siab" los ntawm kev kub siab dua preheating rau cov hmoov resin melting. Ultra-thin workpieces muaj peev xwm ua kom sov tsawg thiab txawm tias qhov kub siab tshaj nws yuav nyuaj kom ua tiav cov txheej txheej adhesion.
Rau cov khoom ua haujlwm ua los ntawm cov khoom sib txawv diameters lossis thicknesses, kev txiav txim siab yuav tsum tau muab thaum txiav txim siab txog qhov kub thiab txias - kom ntseeg tau tias qhov ntsuas kub qis tshaj tau lees paub ua tiav cov txheej txheem txheej txheej ntawm cov cheeb tsam thinnest thaum tsis txhob yellowing ntawm cov ntu tuab los ntawm kev xaiv qhov tsim nyog sab saud.
Kev cuam tshuam ntawm Cov Khoom Siv Ua Haujlwm
Feem ntau ntawm cov khoom kuaj tau hais los saum toj no yog ua los ntawm cov hlau tsis tshua muaj carbon. Rau ntau hom hlau, txawm tias nws yog carbon steel lossis hlau alloy, qhov kub ntawm qhov preheating muaj qhov cuam tshuam tsawg. Qhov kub preheating rau tooj liab zoo ib yam li cov hlau tab sis siab dua me ntsis. Aluminium muaj kev kub ceev ceev thiab dissipation, yog li qhov kub ntawm preheating yuav tsum siab dua.
Kev cuam tshuam ntawm Workpiece Shape
Cov kev sim no kuj tau ua rau ntawm cov khoom ua haujlwm nrog cov duab sib txawv, qhia tias cov khoom muaj qhov ua kom qis dua cov cua sov thiab cov khoom tawg, thaum kaw qhov hollow xws li cov tubular Cheebtsam kuj ua rau txo cov cua sov dissipation. Conversely, mesh thiab slender qhov chaw muaj qhov ceev tshaj plaws kub poob. Tus nqi ntawm tshav kub cia thiab dissipation yog feem ntau txiav txim los ntawm qhov ntim-rau-surface cheeb tsam piv ntawm lub workpiece. Yog li ntawd, nws yog ib qho tsim nyog yuav tau kho qhov kub thiab txias raws li qhov tsim nyog coefficient sib haum rau cov duab ua haujlwm. Xav tau kev tshawb fawb ntxiv hauv cheeb tsam no.
xaus
- Lub preheating kub ntawm lub workpiece yog qhov tseem ceeb tshaj plaws nyob rau hauv kev txiav txim lub txheej zoo thaum lub sij hawm fluidized txaj dipping.
- Lub preheating kub ntawm lub workpiece yog feem ntau txiav txim los ntawm nws txoj kab uas hla los yog thickness, thiab yuav txiav txim los ntawm xa mus rau daim duab 1 rau kev taw qhia.
- Cov hmoov sib txawv muaj cov ntsiab lus sib txawv thiab cov ntsiab lus decomposition, uas yuav tsum tau txiav txim siab thaum txiav txim siab cov txheej txheem dipping.
- Cov khoom thiab cov duab ntawm lub workpiece kuj cuam tshuam rau qhov yuav tsum tau preheating qhov kub thiab txias, uas yuav tsum tau compensated siv ib tug kho qhov tseem ceeb.
