Cov Chaw Txias Txias thiab Cov Hlau Ua Haujlwm - Cov ntsiab lus me me uas tseem ceeb
Ob tug yam ntxwv ntawm ib lub taub hau hluav taws xob cua sov raj feem ntau tsis tau txais kev saib xyuas kom txog thaum muaj ib yam dab tsi mus tsis ncaj ncees lawm. Qhov chaw txias thiab hom kev txiav tawm cov hlau lead zoo li cov ntsiab lus me. Hauv kev xyaum, lawv txiav txim siab seb lub tshuab cua sov puas kav ntev xyoo lossis ua tsis tiav hauv ib lub lis piam. Kev nkag siab txog cov yam ntxwv no tso cai rau cov ntsiab lus ntse dua rau txhua daim ntawv thov tshwj xeeb.
Qhov chaw txias yog qhov tsis muaj cua sov nyob rau tom qab kawg ntawm lub tshuab hluav taws xob lub tshuab hluav taws xob uas cov xaim sab hauv tsis kam. Qhov ntev, feem ntau 5 mus rau 15 hli, ua haujlwm rau lub hom phiaj tseem ceeb. Nws ua kom cov hlau txiav qhov chaw txias txaus rau cov hlau rwb thaiv tsev thiab cov davhlau ya nyob twg. Qhov kub poob raws qhov chaw txias yog qhov txaus ntshai heev. Thaum kawg ntawm qhov cua sov, qhov kub yuav yog 400 degree. Tsuas yog 10 hli rov qab, kub feem ntau poob qis dua 100 degree. Yog tsis muaj qhov txias txias no, cua sov yuav mus ncaj qha los ntawm cov coil tiv thaiv mus rau cov hlau lead, melting txheem rwb thaiv tsev tam sim ntawd.
Feem ntau yuam kev nrog thaj chaw txias muaj qhov tsis raug qhov tob tob. Thaum lub tshuab rhaub cartridge raug thawb dhau mus rau hauv qhov muag tsis pom, qhov chaw txias yuav xaus rau hauv qhov cua sov. Qhov kub ntawm qhov chaw txiav tawm ces nce kom phim cov hlau ib puag ncig. Rau kev tuag khiav ntawm 300 degree, uas txhais tau hais tias cov hlau lead pom 300 degree. Standard PVC hlau rwb thaiv tsev tsis ua hauj lwm ntawm 105 degree. Txawm tias qhov siab -kub fiberglass-cov ntaub thaiv npog feem ntau yog ntsuas rau 450℃txuas ntxiv. Tab sis cov epoxy lossis ceramic terminal block kuj muaj kev txwv. Feem ntau cov txheej txheem txiav cov ntaub ntawv degrade saum 250 degree. Qhov tshwm sim yog melted rwb thaiv tsev, davhlau ya nyob twg tsis ua hauj lwm, thiab ib tug luv luv tuag.
Kev daws yog ceev faj ntsuas. Lub rhuab ntev ntawm lub cartridge rhaub yuav tsum phim lub qhov tob raws nraim. Ib qho ntxiv 5 mus rau 10 mm ntawm unheated ntev yuav tsum nyob sab nraum lub qhov. Rau cov ntawv thov uas dhau los ntawm - qhov kev txhim kho yog tsim nyog, ob npaug - tas cartridge rhaub yuav yog qhov kev xaiv zoo dua, tab sis qhov ntawd yog cov khoom sib txawv. Rau kev tsim ib qho kawg nkaus, hwm thaj chaw txias yog qhov yuav tsum tau ua.
Lead termination xaiv sib txawv. Cov hlau lead hlau siv fiberglass rwb thaiv tsev nrog npib tsib xee- lossis tooj liab- cov neeg siv khoom. Cov no tuav 450℃ntawm qhov chaw sib txuas tab sis yog nruj thiab nquag fraying. Rau cov ntawv thov nrog rov flexing, xws li lub platen txav, Teflon-insulated leads nrog stranded conductors muab kev yooj yim dua. Teflon tuav 250℃tsis tu ncua, uas txaus rau feem ntau qhov chaw txias txias. Rau cov ntawv thov kub siab tshaj plaws, stainless hlau overbraided ua nrog ceramic hlaws rwb thaiv tsev muaj nyob, tab sis cov no yog kim thiab tshwj xeeb.
Terminal tus pin style kuj tseem ceeb. Standard cartridge heaters muaj cov khoom nickel pins tawm hauv lub hnab. Cov hlau lead yog crimped los yog soldered rau cov pins. Rau siab - ib puag ncig kev co, crimped kev sib txuas nrog lub tes tsho xauv tiv thaiv kom xoob. Rau chav huv huv lossis daim ntawv thov kev kho mob, cov khoom sib txuas molded ntawm lub rhaub kawg muab lub kaw lus, kev sib kis -dawb interface. Qee cov North American UL tau ntawv pov thawj ib lub taub hau hluav taws xob cua sov raj tuaj nrog ua ntej - txuas txuas txuas txuas nrog cov khoom lag luam tshwj xeeb. Qhov no simplifies hloov tab sis txo qhov yooj.
Screw davhlau ya nyob twg versions muaj ib qho tseem ceeb hlws ris lub thawv txuas rau qhov kawg txias. Cov xov hlau los ntawm cov tswj vaj huam sib luag tsaws ncaj qha rau ntawm lub davhlau ya nyob twg hauv lub thawv. Txoj kev no tshem tawm cov hlau lead sab nraud tag nrho, ua kom hloov tau yooj yim. Lub thawv sib txuas nws tus kheej yuav tsum tau ua kom txias, yuav tsum tau qhov chaw txias kom ntev mus rau hauv lub thawv. Rau qhov cub lossis cov ntaub thaiv qhov chaw uas qhov kub thiab txias tshaj 150 degree, cov thawv sib txuas yuav tsum tau ua kom txias txias los yog chaw taws teeb mounting.
Xaiv qhov kev txiav tawm tsis ncaj ncees rau daim ntawv thov ua rau qhov ua tsis tiav. Kev sib txuas xoob ua rau arcing thiab burnouts. Melted rwb thaiv tsev ua rau luv. Cov tawv nqaij ua rau hauv kev txav tshuab qaug zog thiab tawg. Qhia meej txog qhov raug txiav tawm pem hauv ntej-fiberglass rau cov cua sov zoo li qub, Teflon rau flexing, ntsia hlau davhlau ya nyob twg rau kev hloov pauv yooj yim- tiv thaiv cov teeb meem no. Ib lub taub hau hluav taws xob cua sov raj nws tus kheej yuav ua tau zoo kawg nkaus, tab sis yog tias qhov kev txiav tsis ua tiav, tag nrho cov kev sib dhos yuav tsum tsis ua haujlwm. Kev xyuam xim rau cov ntsiab lus me me no ua rau qhov sib txawv ntawm qhov kev daws teeb meem cua sov uas muaj kev ntseeg siab thiab qhov teeb meem rov tshwm sim.
