Teeb meem Thermocouple Slow Temperature Response in Hot Runner Production

Ubiquitous zais thermocouple txhaum yog qhov ntsuas kub qeeb, uas yog tus cwj pwm los ntawm tus tswj qhov ntsuas kub nkhaus lagging qab qhov hloov pauv kub kub tiag tiag, ua rau PID lub zog hloov kho lig, rooj vag solidification, yas scorching thiab cov kab noj hniav tsis zoo. Feem ntau ntawm cov kws tshaj lij tsuas yog qhov muag tsis pom kev tweak tus maub los PID tsis tau los nkaum qhov lag luam yam tsis tau saib xyuas lub hauv paus laj thawj ntawm cov khoom siv thermocouple thiab kev teeb tsa. Cov kab lus no tau txheeb xyuas cov ntoo ua txhaum ntawm cov lus teb qeeb, kauj ruam - los ntawm - kauj ruam ntawm - qhov teeb meem ntawm qhov chaw ua ntu zus thiab cov phiaj xwm tshem tawm.

Kauj Ruam 1: Tshawb xyuas qhov chaw thermal barrier (qhov feem ntau ntawm kev ua tsis tiav). Cov pa roj carbon ntau, cov khoom seem kho tau los tiv thaiv- ntes roj thiab cov hnub nyoog thermal conductive muab tshuaj txhuam tsim ib qho thaiv thaiv ntawm lub taub hau thiab cov hlau khiav kub. Cov pa roj carbon txheej nyias li 0.05mm ntxiv 2-4 vib nas this rau lub sijhawm teb. Txoj kev tshuaj xyuas: Fais fab tuag thiab txias cov pwm, unscrew lub thermocouple thiab kawm qhov kev sib cuag. Yog hais tias nws yog them nrog dub tawv carbon blocks, qhov no yog vim li cas. Kev daws: Ntxuav tag nrho cov pa roj carbon thiab cov organic residue siv cov kuab tshuaj ntxuav nruab nrab thiab tooj liab txhuam, kom qhuav thiab rov ua dua -coated a micro- txheej nyias nyias ntawm cov thermal conductive muab tshuaj txhuam ua ntej rov nruab.

Kauj Ruam 2: Txheeb xyuas qhov sib cuag kom nruj thiab huab cua sib txawv. Tias yog vim li cas tiaj tus - taub hau thermocouple aging compression springs poob elasticity, sojntsuam positioning screws tsis nruj txaus thiab muaj cov pa me me ntawm lub taub hau thiab ntsuas lub dav hlau. Huab cua yog ib tug tsis zoo conductor ntawm tshav kub thiab ib tug ruaj khov txheej ntawm thermal buffer yog tsim uas inhibits qhov ntws ntawm tshav kub. Kev soj ntsuam tus qauv: Tshem tawm lub caij nplooj ntoos hlav thermocouple, txiav txim siab tias lub caij nplooj ntoos hlav yog khoov thiab softened; manually nias lub taub hau tiaj tus tawm tsam lub dav hlau manifold, xyuas seb puas muaj qhov sib txawv txav. Kev daws: Hloov lub qub compression caij nplooj ntoos hlav, ntsia hlau qhov chaw ntsia hlau nrog ib txwm torque, xyuas kom meej tias qhov saum npoo yog haum tsis muaj qhov sib txawv ntawm huab cua.

Kauj Ruam 3. Nrhiav cov txheej txheem kev lag luam ntawm cov thermocouple hom. Lub ntuj teb lag ntawm 2.5-4 vib nas this ntawm ungrounded kiag li insulated armored probes yog ib tug ib txwm hardware yam ntxwv es tsis muaj teeb meem. Rau ultra- siab- nrawm nyias- phab ntsa molding, nyob rau hauv cov kab ntau lawm uas lub sij hawm teb yuav tsum tsawg dua 1.5 vib nas this, lub sensor yuav tsum tau hloov nrog grounded exposed hlaws uas tsis muaj thermal mass thermocouple. Yog tias lwm yam ceev ceev- teb cov sensors ntawm lub xaib kuj qhia pom tseeb latency, txiav txim siab txog cov qauv ua haujlwm thiab txuas ntxiv kev tshawb nrhiav kho vajtse.

Kauj Ruam 4: Tshawb xyuas qhov degradation ntawm sab hauv sheath insulating hmoov. Ntev -lub sij hawm siab- kub ci thiab noo noo infiltration ua rau lub puab magnesium oxide insulating hmoov ntawm lub sheath kom pulverize thiab ua voids, txo cov tshav kub kis efficiency nyob rau hauv. Txhawb nqa phenomena, qeeb teb: intermittent kub dhia, nce voj tsis kam kaw los ntawm multimeter. Koj tsis tuaj yeem txhuam qhov kev puas tsuaj no tawm. Koj yuav tsum tau hloov tag nrho cov thermocouple.

Kauj Ruam 5: Tshem tawm kev cuam tshuam los ntawm pwm txheej thiab txheej txheej insulating. DLC, PTFE tuab txheej ntawm lub dav hlau ntsuas los yog tuab fiberglass rwb thaiv tsev gaskets nyob ib ncig ntawm qhov ntsuas taw tes tsim cov teeb meem sab nraud. Xyuas kom paub meej tias qhov ntsuas ntsuas tsis tau them los ntawm cov txheej txheem thermal conductivity tsawg. Yog tias muaj, hauv zos tshem tawm cov txheej txheem los yog ua kom tuab ntawm thermal conductive paste txheej kom them nyiaj.

Kauj Ruam 6: Txheeb xyuas qhov kev txo qis ntawm qhov ntev - ncua kev txuas xov hlau teeb liab. Cov teeb liab poob nrog qhov nqaim heev lossis tsis sib haum nrog cov xov hlau txuas ntxiv. Qhov no txhais tau tias qeeb Kub nce tawm tswv yim thiab tas li nyob rau hauv kev nyeem ntawv. Ntsuas tag nrho lub voj tsis kam, yog tias tshaj 15% siab dua tus qauv rau qhov sib npaug ntawm qhov ntev ntawm cov xaim tshiab, nruab hnyav-cov dej num sib txuas txuas txuas nrog kev tiv thaiv.

Kauj Ruam 7. Tshem tawm qhov hloov kho qhov txias txias thiab cov khoom siv kho vajtse ncua. Tshem tag nrho cov teeb meem thermocouple kho vajtse thiab tom qab ntawd sim tus maub los txias junction them nyiaj module. Kev laus them nyiaj thermistors yuav ua rau lub teeb liab ua haujlwm qeeb thiab yuav tsum tau hloov pauv ntawm pawg tswj hwm channel.

Nyob rau ntawm qhov chaw tus txheej txheem kev saib xyuas kev ua txhaum kev tua phom sij tseem ceeb: Kev ntxuav ntawm cov pa roj carbon monoxide & cov roj seem → Tshuaj xyuas lub caij nplooj ntoos hlav nruj & kev sib cuag → Tshawb xyuas ntawm cov thermocouple hom kev sib piv → Kev ntsuas hluav taws xob ntawm cov khoom siv hluav taws xob sab hauv cov hmoov av tsis zoo → Tshawb xyuas pwm txheej / rwb thaiv tsev cuam tshuam → Kev kuaj txuas ntxiv xaim tsis kam → Tshawb xyuas cov khoom siv hluav taws xob. Ua raws li qhov ntu no, txhawm rau txhawm rau tshawb pom qhov tshwm sim tam sim ntawd, yam tsis muaj qhov muag tsis pom kev cuam tshuam thiab qhov ntsuas qhov ntsuas qhov ntsuas, txhawm rau daws qhov ntsuas kub qeeb qeeb hauv qhov yuam kev.