Lwm Qhov Chaw Cuam Tshuam cuam tshuam Ultrasonic Vuam Kev Ua Yeeb Yam ntawm Cov Khoom Yas
Hauv ultrasonic welding, muaj lwm yam uas yuav tsum tau txiav txim siab, suav nrog kev cuam tshuam ntawm cov txheej txheem kev txhaj tshuaj, dej nqus, cov pwm tso tawm cov neeg ua haujlwm, cov roj ntsha, cov yas ntim khoom, ntxiv rau, nplaim taws rov qab, cov khoom siv rov ua dua, cov xim sib xyaw, thiab cov qib yas.
(1) Kev nqus dej ntawm cov yas:
Cov dej nqus ntawm cov plastics yog qhov tseem ceeb ntawm qhov ua tau zoo ntawm ultrasonic vuam. Yog tias cov yas muaj dej ntau dhau, thaum lub sijhawm ua haujlwm vuam ultrasonic, thaum qhov kub mus txog qhov kub taw ntawm cov dej, cov dej hauv cov hnab yas evaporates thiab vaporizes, thiab qhov sib tshuam welded yog foamy, uas ua rau lub zog ultrasonic vuam qis, thiab nws yog qhov nyuaj kom tau txais kev ua tiav sealing thiab qib siab. Cov tsos ntawm qhov zoo; ntxiv rau, ntau dhau dej noo tseem yuav ua rau lub sijhawm vuam sij hawm ntev thiab nce tus nqi vuam.
Cov ntu yas nrog dej nqus yuav tsum tau ultrasonically welded tam sim ntawd tom qab txhaj. Yog hais tias vuam siv tsis tau tam sim ntawd, nws yuav tsum muab ntim nrog PE hnab ntim muaj ib qho desiccant; cov nqus ntawm cov yas yam tsis muaj qhov ntim pob khoom yuav tsum muab ziab ua ntej ua ntej vuam.
(2) Tus neeg sawv cev tso tawm:
Cov khoom tso tawm feem ntau txau ncaj qha rau hauv cov pwm kab noj hniav kom pab cov yas ib sab khiav tawm ntawm cov kab noj hniav los ntawm kev txo qis kev sib txhuam ntawm ntu yas thiab kab noj hniav. Hmoov tsis zoo, hauv ultrasonic vuam, tus tso tawm tso tawm kuj tseem txo qhov kev sib txhuam ntawm ob sab ntawm cov khoom yas ntawm lub vuam sib txuas, thiab cov txheej txheem ultrasonic vuam tso rau ntawm kev sib txhuam saum npoo kom ua kom muaj cua sov, thiab cov tso tawm tso tawm txo qhov kev ua haujlwm ultrasonic welding. Ntxiv rau, cov tshuaj hauv cov dej tso tawm khoom tseem cuam tshuam cov kev kis tau ntawm qhov xav tau lub zog weld.
Yog li no, rau cov khoom seem uas xav tau ultrasonic vuam, nws yog qhov tsim nyog kom tsis txhob siv cov khoom tso tawm thaum lub sijhawm txheej txheem kev txhaj tshuaj. Yog tias koj yuav tsum siv cov tshuaj tso tawm, koj yuav tsum ntxuav cov yas ua ntej soldering, tab sis tsuas yog qee tus neeg tso tawm tuaj yeem muab ntxuav tawm. Cov neeg tso tawm kom qhuav yog cov kev pom zoo, uas muaj kev cuam tshuam tsawg kawg nkaus rau ultrasonic weldability thiab tsis tas yuav tsum tu ua ntej soldering. Sim ua kom tsis txhob siv cov pwm tso tawm xws li silicon, fluorine, zinc stearate thiab aluminium stearate.
(3) Roj nplua nyeem:
Cov khoom siv roj nplua nyeem xws li waxes, zinc stearate, aluminium stearate, stearic acid thiab fatty acids tau ntxiv rau cov yas rau kev txhim kho khiav thiab nce kev ua haujlwm ntawm kev txhaj tshuaj. Txawm li cas los xij, hauv ultrasonic vuam, cov roj nplua nyeem txo qhov kev sib txhuam coefficient ntawm lub vuam interface, yog li cuam tshuam ultrasonic welding kev ua haujlwm ntawm cov yas.
(4) Ruam:
Txhawm rau txhawm rau txhim kho cov neeg kho tshuab zog ntawm plastics, fillers yog ntxiv rau plastics. Cov khoom siv siv txauv yog iav fiber, carbon fiber, talc thiab calcium carbonate. Cov iav iav tau ntxiv rau cov yas kom ntxiv cov neeg kho tshuab lub zog thiab qhov ntev kev ruaj ntseg ntawm cov yas. Cov ntxhia lim ua kom zoo nkauj, xws li fiberglass thiab talc, ua kom muaj peev xwm ntawm cov plastics ua kev tshee tshee thiab txhim kho ultrasonic vuam cov yam ntxwv ntawm plastics, tshwj xeeb tshaj yog rau cov semi-crystalline plastics. Feem ntau, 10% txog 20% ntawm cov iav fiber ntau yuav txhim kho txoj kev ua haujlwm ultrasonic vuam plastics.
Txawm li cas los xij, qhov tseeb tias qhov sib piv yog loj dhau coj lwm yam teeb meem. Piv txwv li, yog tias qhov kev faib ua feem yog 30%, tab sis ntawm qhov chaw sib txuas ntawm qhov chaw ua haujlwm, qhov sib piv qhov tseeb yuav tau dhau 30%, yog li tsis muaj cov yas melting ntawm vuam interface kom tau qhov xav tau qhov zoo vuam. Thaum qhov kev faib ua feem ntawm tus muab tub lim ntau tshaj 40%, nws yog qhov muaj tseeb tias ntau cov khoom siv tsis tau ntawm weldable ntawm vuam interface dua li cov khoom muag, uas txhais tau tias kev ua haujlwm ultrasonic vuam ua tsis zoo.
(5) Cov khoom xa rov qab:
Cov khoom siv rov ua dua tshiab feem ntau ntxiv rau plastics vim qhov rov ua dua tshiab ntawm cov yas thiab tus nqi ntawm qhov chaw thiab cov khoom siv. Ultrasonic vuam tso cai ntxiv cov khoom siv hauv cov yas, vim tias cov khoom siv nws tus kheej yog tib yas, tab sis qhov sib npaug ntawm cov khoom tsis tuaj yeem loj dhau, thiab cov khoom tsis tuaj yeem ua rau xeb lossis paug, tsis li ntawd yuav muaj vuam zoo teeb meem. Txhawm rau kom muaj qhov zoo ntawm vuam, nws raug pom zoo tias qhov kev faib ua feem ntawm cov khoom xa rov qab yog tsawg li sai tau.
(6) Xim:
Cov pigments muaj cov nyhuv me dhau ntawm ultrasonic weldability ntawm plastics tshwj tsis yog tias qhov sib npaug ntawm cov xim muaj ntau dhau. Dawb thiab dub feem ntau xav tau ntau xim dua li lwm yam xim, thiab yuav ua rau qee qhov teeb meem soldering. Cov xim sib txawv ntawm tib cov yas yuav xav tau sib txawv vuam sib txawv thiab tuaj yeem muab tau los ntawm kev ntsuas kom haum.
(7) Qib Yas:
Cov yas qib muaj tus cwj pwm zoo rau cov khoom lag luam ultrasonic welding ntawm plastics. Cov qib sib txawv ntawm cov yas tib yam tej zaum yuav muaj cov ntsiab lus sib txawv thiab cov yam ntxwv sib txawv.
