Qhov twg plastics yog qhov tsim rau ultrasonic vuam?
Cov ntaub ntawv ua los ntawm tib cov yas thiab cov ntaub ntawv ua los ntawm cov plastics txawv tuaj yeem sib txuas siv ntau txoj hauv kev. Piv txwv li, vuam yog ib qho kev ua haujlwm ib txwm muaj. Tshwj xeeb tshaj yog thaum cov nplaum tsis tuaj yeem lav txaus los yog ntev-ntev kev sib txuas. Yas vuam tsis yog txoj hlua hluav taws xob; Qhov no yog cov khoom siv muaj zog. Txawm li cas los xij, qhov no tsuas yog siv rau thiaj li hu ua thermoplastic cov ntaub ntawv (uas tuaj yeem tsim thaum rhuab).
1. Thermopplastic cov ntaub ntawv: mas tsim ntawm linear molecular chains, lawv swb rau ib leeg thaum rhuab, muab cov yas, muab cov yas ntxiv, muab cov yas ua kom sov, muab cov yas ntxiv.
2. Elasticity: Tsim ntawm ib qho kev sib tw ntawm cov molecular charts, lawv yuav rov qab mus rau lawv thawj lub xeev ib zaug kom sov. Yog li ntawd, nws tsis tuaj yeem tsim los ntawm vuam txheej txheem.
3. Thermosetting cob: tsim los ntawm nruj nreem interlocked molecular chains. Cua sov yuav rhuav lawv cov qauv, uas txhais tau tias melting thiab vuam yog tsis yooj yim sua.
Thermoplastic ntaub ntawv
Tsuas yog tib lub thermopoplastic cov khoom tuaj yeem yog uniformly (uniformly) welded. Txhua cov ntaub ntawv thermoplastic tshwj tsis yog PTFE tuaj yeem welded. Txawm li cas los xij, muaj cov khoom siv tshwj xeeb sib txawv ntawm plastics:
1. ABS (Acrylonitrile Butadiene STyrene)
Nws tuaj yeem muab tau yooj yim. Kev sib tsoo kub yog nyob ntawm 270 thiab 310 degree C.
2. PS (polystyrene)
Nws kuj tseem yuav welded yooj yim. Kev sib tsoo kub yog nyob ntawm 270 thiab 310 degree C.
3. PP (polypropylene)
Vim yog cov kev cog lus ceev ntawm PP, nws yog ib qho tsim nyog los saib xyuas qhov kub thiab txias thiab lub sijhawm sov. Kev sib tsoo kub yog nruab nrab ntawm 230 thiab 280 Degree C.
4. PE (Polyethylene)
Nws tuaj yeem yooj yim welded, tab sis cov nplaum nplaum tsis tuaj yeem siv rau kev sib raug zoo. Lub tshuab kev sib tsoo yog nruab nrab ntawm 220 thiab 280 Degree C.
5. Pvc (polyvinyl chloride)
Zeually yuav tsum tau them rau qhov ntsuas kub thiab cua sov, raws li PVC hlawv sai heev thiab ua cov ntaub hydrochloric acid. Qhov kub vuam yog nyob nruab nrab ntawm 250 thiab 280 Degree C.
6. PMMA (Polymethyl Methacrylate)
Cov iav acrylic feem ntau. Nws tuaj yeem muab tau yooj yim. Qhov kub vuam yog nyob nruab nrab ntawm 120 thiab 180 Degree C.
7. PC (Polycarbonate)
Nws kuj tseem yuav welded yooj yim. Kev sib tsoo kub yog nyob ntawm 270 thiab 310 degree C.
Kev txiav txim siab cov khoom siv
Cov yam ntxwv ntawm cov ntaub ntawv ua lub luag haujlwm tseem ceeb hauv cov txheej txheem vuam zoo:
1. Lub Elastic Module (E-Madult) piav txog lub nro thiab nthuav ntawm cov yas thaum quab yuam yog siv. Cov loj dua hluav taws xob module, qhov zoo dua lub suab sib kis ntawm cov khoom siv.
2. Poob siab ua rau muaj cov qib uas txhaj tshuaj yas thiab hloov kho tshuab hluav taws xob. Qhov ntau dua qhov damping ntawm J, lub zog ua kom lub zog cua sov, zoo li kev co hluav taws xob lub zog hloov dua siab tshiab.
3. Qhov point ntawm uas muaj cov khoom siv melting cov khoom hloov los ntawm cov khoom siv rau cov kua. Nws txiav txim siab tias yuav tsum muaj cov cua sov ntau npaum li cas rau cov vuam.
4. Melt viscosity: Yuav ua li cas nrawm yog tus nqi ntws ntawm melted ib feem ntawm yas. Nyuaj melts zoo li nyob hauv thaj chaw sib txuas, ua rau muaj cov txheej txheem sib dhos ntau dua.
Txhawj Qhia
Muaj ntau yam lwm yam lwm tus tuaj yeem cuam tshuam rau lub weldability ntawm cov plastics:
Cov nyhuv tsis zoo
1. Cov phom tua hluav taws: cov tshuaj ntxiv tuaj yeem tiv thaiv cov yas ntawm kev ua tsis ncaj rau sab nraud. Txawm li cas los xij, qhov no kuj txhais tau tias cov quav ntxiv ua rau nws nyuaj dua los kho plastics nrog ultrasound.
2. Ya dej noo (tshwj xeeb yog polyamide): Yog tias cov ntsiab lus ya raws tau siab, nws yuav yaj thaum lub sijhawm ua vuam. Qhov no yuav ua rau cov npuas kom tshwm rau hauv thaj chaw sib txuas, ua rau muaj vuam vuam pob qij txha.
Zoo Qhov Cuam Tshuam
1. Cov fiberglass: Ua kom muaj lub zog txhav, muaj zog, yog li kev txhim kho qhov kev coj ua ntawm lub suab, tshwj xeeb tshaj yog nyob rau hauv sine crystalline plastics.
2. Cov hlaws dai: Ua kom lub siab tsis kam ntawm cov yas, yog li txhim kho qhov kev coj zoo ntawm lub suab, tshwj xeeb tshaj yog nyob rau hauv sine crystalline plastics.
