Nyob rau ntawm 300 degrees Celsius, lub cua sov platen hloov ib feem loj ntawm nws lub zog tsis yog los ntawm kev sib cuag ncaj qha, tab sis los ntawm kev pom, ci ntsa iab infrared tawg. Qhov kev ua tau zoo ntawm qhov hloov hluav taws xob hluav taws xob no yog tswj hwm los ntawm ib qho khoom siv saum npoo av: nws emissivity. Ib qho liab qab, oxidized steel nto thiab PTFE-coated ib qho ob qho tib si tshwm sim txawv heev rau lub qhov muag, tab sis mus rau lub nthwv dej infrared, lawv zoo li xav tsis thoob. Qhov sib txawv tseem ceeb ntawm lawv tsis yog qhov zoo npaum li cas lawv tawm cua sov, tab sis yuav ua li cas thaum ib feem kov lawv.
Radiative Heat Transfer thiab Surface Emissivity
Kev ua tau zoo ntawm cov cua sov platen hauv hluav taws xob hloov hluav taws xob feem ntau txiav txim siab los ntawm nws qhov chaw emissivity. Oxidized steel, nrog nws qhov tsaus nti, matte nto, muaj qhov emissivity siab heev, feem ntau nyob rau hauv thaj tsam ntawm 0.8 txog 0.9. Qhov no ua rau nws zoo heev radiator, zoo xa thermal zog mus rau ib puag ncig. Kuj ceeb tias, PTFE txheej-txawm tias nws cov tsos dawb lossis zoo li translucent- kuj tseem muaj qhov zoo sib xws, feem ntau nyob ib puag ncig 0.9 hauv infrared spectrum.
Rau qhov muag infrared, cov yas dawb thiab cov hlau dub yog tib yam sov, ci xim. Los ntawm kev pom radiative ntshiab, ob qhov chaw ua tau zoo ib yam ntawm 300 degree, txhais tau hais tias thermal efficiency ntawm platen tsis cuam tshuam los ntawm PTFE txheej.
Mechanical thiab Surface Interaction Sib txawv
Thaum emissivity tswj cov hluav taws xob hloov hluav taws xob, cov tshuab hluav taws xob saum npoo tswj hwm qhov kev tso tawm thiab cov txheej txheem kev ntseeg tau. Lub microscopically ntxhib oxide txheej ntawm cov hlau tuaj yeem cuam tshuam nrog cov khoom siv hluav taws xob kub, ua rau ua rau, sib tw, lossis kua muag thaum tshem tawm. PTFE, nrog nws cov ultra- qis zog saum npoo thiab du, chemically inert txheej, muab qhov zoo tshaj plaws uas tsis yog -stick interface. Qhov no tso cai rau cov khoom raug tshem tawm kom huv, tsis muaj marring, deformation, lossis residual adhesion.
Kev sib xyaw ua ke ntawm cov emissivity siab thiab tso tawm ua haujlwm ua rau PTFE-coated platens tshwj xeeb tshaj yog muaj txiaj ntsig zoo hauv cov txheej txheem uas qhov kev ncaj ncees yog qhov tseem ceeb.
Ntsuas Emissivity
Lub emissivity ntawm ib tug nto yog ib tug dimensionless naj npawb ntawm 0 thiab 1 thiab yuav tsum tau ntsuas nrog ib tug tshwj xeeb emissometer. Ob leeg oxidized steel thiab PTFE nto ntawm 300℃yuav sau npe nyob ze 0.9, paub meej tias lawv cov hluav taws xob zoo sib xws. Rau cov txheej txheem engineers, qhov kev xaiv ntawm cov ntaub ntawv no yog li tsawg dua ntawm kev hloov hluav taws xob thiab ntau ntxiv txog kev siv tshuab thiab tshuaj lom neeg nrog cov khoom ua haujlwm.
Xaus
Thaum kub kub, oxidized steel thiab PTFE txheej yog sib npaug ntawm cov thermal radiators. PTFE txheej, txawm li cas los xij, muab qhov tseem ceeb, ntxiv superpower ntawm kev tawm dag zog ib feem. Los ntawm kev sib xyaw ua ke thermal efficiency nrog tsis yog -stick kev ua tau zoo, PTFE-coated platen xyuas kom meej tias cov cua sov xa tawm sib npaug thiab cov khoom raug tshem tawm kom huv, tiv thaiv cov khoom thiab cov txheej txheem.
Qhov zoo tshaj plaws platen nto yog qhov uas xa cov cua sov tawm thiab cia qhov chaw mus.
