Yas vuamyog vuam rau cov ntaub ntawv yas semi-tiav lawm, thiab tau piav qhia hauv ISO 472 raws li cov txheej txheem ntawm kev sib koom ua ke ntawm cov ntaub ntawv softened, feem ntau nrog kev pab los ntawm tshav kub (tshwj tsis yog hnyav vuam).Vuam ntawm thermoplastics yog ua tiav nyob rau hauv peb theem ua ntu zus, uas yog kev npaj nto, kev siv cua sov thiab siab, thiab cua txias.
Kub roj vuam
Kub gas welding, tseem hu ua cua kub vuam, yog cov txheej txheem vuam yas siv cov cua sov.Ib rab phom cua sov tsim tshwj xeeb, hu ua cua kub welder, tsim lub dav hlau ntawm cov cua kub uas ua rau ob qho tib si sib koom ua ke thiab cov yas muab tub lim, txhua yam yuav tsum yog tib yam lossis cov yas zoo sib xws.(Vuam PVC rau acrylic yog ib qho kev zam rau txoj cai no.)
Cov cua kub / roj welding yog cov txheej txheem tsim khoom siv rau kev tsim cov khoom me xws li cov tso tsheb hlau luam, cov dej tso dej, cov khoom siv hluav taws xob, thiab cov kav dej.
Nyob rau hauv cov ntaub ntawv ntawm webs thiab films ib tug muab tub lim yuav tsis siv.Ob daim ntawv yas yog rhuab los ntawm cov roj kub (los yog cov khoom cua sov) thiab ces dov ua ke.Qhov no yog txheej txheem vuam ceev thiab tuaj yeem ua tsis tu ncua.
Ceev ceev welding
Nrog ceev welding, cov yas welder, zoo ib yam li ib tug soldering hlau nyob rau hauv tsos thiab wattage, yog haum nrog ib tug pub raj rau cov yas weld pas nrig.Qhov ceev ceev heats tus pas nrig thiab lub substrate, thaum tib lub sij hawm nws nias lub molten weld pas nrig rau hauv txoj hauj lwm.Ib tug hlaws ntawm softened yas yog nteg nyob rau hauv lub sib koom ua ke, thiab qhov chaw thiab weld qws fuse.Nrog rau qee hom yas xws li polypropylene, cov welded welding pas nrig yuav tsum tau "sib xyaw" nrog cov khoom siv semi-melted puag yog fabricated los yog kho.Cov txheej txheem vuam no tau txhim kho nyob rau lub sijhawm thiab tau siv rau ntau tshaj 50 xyoo los ntawm cov kws tshaj lij yas fabricators thiab cov neeg kho thoob ntiaj teb.Txoj kev nrawm nrawm vuam yog txoj kev vuam ceev dua thiab nrog kev xyaum tuaj yeem siv rau hauv cov ces kaum nruj.Ib qho qauv ntawm cov lus qhia ceev "phom" yog qhov tseem ceeb ntawm cov hlau uas muaj qhov dav, lub taub hau uas tuaj yeem siv los yaj cov vuam sib txuas thiab cov khoom muab tub lim los tsim kev sib cog lus.
Extrusion vuam
Extrusion welding tso cai rau daim ntawv thov ntawm cov welds loj dua nyob rau hauv ib zaug weld pass.Nws yog cov txheej txheem nyiam rau kev koom nrog cov khoom siv ntau dua 6 hli tuab.Vuam pas nrig yog kos rau hauv me me tes tuav yas extruder, plasticized, thiab raug yuam tawm ntawm lub extruder tiv thaiv cov khoom tau koom nrog, uas yog softened nrog lub dav hlau ntawm cov cua kub kom tso cai rau kev sib koom ua ke.
Hu rau vuam
Qhov no yog tib yam li qhov chaw vuam tshwj tsis yog tias cov cua sov tau muab nrog thermal conduction ntawm cov lus qhia pincher es tsis txhob siv hluav taws xob.Ob qhov yas yog coj los ua ke qhov twg cov lus qhia rhuab pinch lawv, melting thiab koom nrog cov khoom hauv cov txheej txheem.
Kub phaj vuam
Hais txog kev sib cuag welding, cov txheej txheem no yog siv los vuam qhov loj, los yog qhov chaw uas muaj qhov sib txuas ntawm qhov sib txuas geometry.Ob qhov chaw yuav tsum tau welded yog muab tso rau hauv cov cuab yeej txuas nrog rau ob qhov sib txawv platens ntawm ib lub xovxwm.Lub phaj kub, nrog rau cov duab zoo sib xws rau qhov sib koom ua ke geometry ntawm cov khoom yuav tsum tau welded, yog txav mus rau hauv txoj hauj lwm ntawm ob qhov chaw.Ob lub platens tawm tsam txav cov khoom mus rau hauv kev sib cuag nrog lub phaj kub kom txog thaum lub tshav kub softens lub interfaces mus rau melting point ntawm yas.Thaum qhov xwm txheej no tiav, lub phaj kub raug tshem tawm, thiab cov khoom raug nias ua ke thiab tuav kom txog thaum lub vuam sib koom ua ke txias thiab rov ua kom muaj zog los tsim kev ruaj ntseg.
Cov khoom siv vuam kub yog feem ntau tswj pneumatically, hydraulically, lossis hluav taws xob nrog servo motors.
Cov txheej txheem no yog siv los txuas cov tsheb hauv qab hood, cov khoom siv hauv tsheb sab hauv, cov khoom siv kho mob pom, cov khoom siv hauv tsev, thiab lwm yam khoom siv hauv tsheb.
High zaus vuam
High Frequency welding, tseem hu ua Dielectric Sealing lossis Radio Frequency (RF) Thaum Tshav Kub Kub Sealing yog ib qho cuab yeej siv tau zoo heev uas tau nyob ib puag ncig txij li xyoo 1940.High zaus electromagnetic nthwv dej nyob rau hauv ntau yam ntawm Xov tooj cua Frequencies tuaj yeem ua kom sov qee cov polymers mus rau softening plastics rau kev koom ua ke.Rhaub yas, nyob rau hauv siab weld ua ke.Thaum tshav kub kub yog generated nyob rau hauv lub polymer los ntawm lub ceev reorientation ntawm ib co tshuaj dipoles ntawm lub polymer, uas txhais tau hais tias cov cua sov yuav tsum localized, thiab cov txheej txheem yuav ua tau tas mus li.
Induction vuam
Thaum cov hluav taws xob insulator, zoo li yas, yog embedded nrog cov khoom uas muaj hluav taws xob conductivity, xws li hlau los yog carbon fibers, induction vuam yuav ua tau.Lub tshuab vuam muaj ib qho induction kauj uas muaj zog nrog lub xov tooj cua zaus hluav taws xob tam sim no.Qhov no generates ib tug electromagnetic teb uas ua rau ib qho hluav taws xob conductive los yog ferromagnetic workpiece.Hauv cov khoom siv hluav taws xob hluav taws xob, cov cua kub tseem ceeb yog cov cua sov uas tsis muaj zog, uas yog vim muaj kev cuam tshuam los ntawm cov hluav taws xob hu ua eddy currents.Induction welding ntawm carbon fiber reinforced cov ntaub ntawv thermoplastic yog ib qho cuab yeej siv feem ntau hauv kev lag luam aerospace.
Nyob rau hauv ib lub ferromagnetic workpiece, yas yuav induction-welded los ntawm formulating lawv nrog metallic los yog ferromagnetic tebchaw, hu ua susceptors.Cov susceptors no nqus hluav taws xob hluav taws xob los ntawm lub kauj induction, ua kub, thiab poob lawv lub zog cua sov rau cov khoom siv los ntawm thermal conduction.
Txhaj welding
Kev txhaj tshuaj welding yog qhov zoo sib xws / zoo ib yam rau extrusion vuam, tshwj tsis yog, siv qee cov lus qhia ntawm tus tuav welder, ib tus tuaj yeem ntxig lub hau rau hauv cov yas tsis xws luag ntawm ntau qhov ntau thiab tsawg thiab patch lawv los ntawm sab hauv.Qhov zoo dua yog tias tsis muaj kev nkag mus rau tom qab ntawm qhov tsis xws luag.Lwm txoj hauv kev yog ib thaj, tshwj tsis yog tias lub thaj tsis tuaj yeem ua rau cov xuab zeb ntub dej nrog cov khoom qub nyob ib puag ncig rau tib lub thickness.PE thiab PP yog qhov zoo tshaj plaws rau cov txheej txheem no.Lub Drader injectiweld yog ib qho piv txwv ntawm cov cuab yeej zoo li no.
Ultrasonic vuam
Nyob rau hauv ultrasonic welding, siab zaus (15 kHz mus rau 40 kHz) tsawg amplitude kev co yog siv los ua kom sov los ntawm kev sib txhuam ntawm cov ntaub ntawv yuav tsum tau koom.Lub interface ntawm ob qhov chaw yog tshwj xeeb tsim los mloog lub zog rau lub siab tshaj plaws weld zog.Ultrasonic tuaj yeem siv rau yuav luag txhua yam khoom yas.Nws yog qhov ceev tshaj plaws cua sov sealing tshuab muaj.
Kev sib txhuam vuam
Hauv kev sib txhuam vuam, ob qhov chaw yuav tsum tau sib sau ua ke ntawm qhov zaus qis (feem ntau 100-300 Hz) thiab siab dua amplitude (feem ntau 1 mus rau 2 hli (0.039 txog 0.079 hauv)) dua ultrasonic vuam.Kev sib txhuam los ntawm cov lus tsa suab ua ke nrog lub clamping siab ntawm ob qhov chaw tsim cov cua sov uas pib yaj cov chaw sib cuag ntawm ob qhov chaw.Nyob rau lub sijhawm no, cov ntaub ntawv plasticized pib tsim cov khaubncaws sab nraud povtseg uas cuam tshuam nrog ib leeg, uas yog li ua rau muaj kev sib txuas zoo.Thaum ua tiav ntawm qhov kev vibration, cov khoom tseem nyob ua ke kom txog thaum lub vuam sib koom ua ke txias thiab cov yas yaj yaj rov ua dua.Kev sib txhuam txav tuaj yeem yog linear lossis orbital, thiab kev sib koom ua ke ntawm ob qhov chaw yuav tsum tso cai rau qhov kev txav no.
Spin vuam
Spin welding yog ib hom kev sib txhuam vuam.Nrog rau cov txheej txheem no, ib feem nrog ib puag ncig weld sib koom ua ke yog nyob ruaj ruaj, thaum lub mating tivthaiv yog tig ntawm kev kub ceev thiab nias tawm tsam qhov chaw ruaj khov.Kev sib txhuam kev sib txhuam ntawm ob qho khoom ua kom sov.Thaum cov khoom sib koom ua ke mus txog lub xeev ib nrab-molten, cov khoom siv spinning tau nres sai.Kev quab yuam ntawm ob lub ntsiab lus yog khaws cia kom txog thaum lub vuam sib koom ua ke txias thiab rov ua kom muaj zog.Qhov no yog ib txoj hauv kev tsim cov yas qis thiab nruab nrab lub luag haujlwm, piv txwv li, rau cov khoom ua si, lub tawb nqa khoom, cov khoom siv rov ua dua tshiab, thiab lwm yam. Cov txheej txheem no tseem siv los txuas ntau qhov chaw nres nkoj qhib rau hauv tsheb hauv qab hood Cheebtsam.
Laser vuam
Cov txheej txheem no yuav tsum muaj ib feem yuav tsum tau xa mus rau lub laser beam thiab ob qho tib si ib feem ntawm absorptive los yog txheej txheej ntawm lub interface kom nqus tau rau cov nqaj.Ob qhov chaw yog muab tso rau hauv siab thaum lub laser beam txav raws txoj kab sib txuas.Cov nqaj hla dhau los ntawm thawj ntu thiab yog absorbed los ntawm lwm tus los yog txheej los tsim kom muaj cua sov txaus kom soften lub interface tsim ib qho chaw ruaj khov.
Semiconductor diode lasers feem ntau yog siv hauv cov yas vuam.Wavelengths nyob rau hauv thaj tsam ntawm 808 nm txog 980 nm tuaj yeem siv los koom nrog ntau yam khoom siv yas sib txuas.Lub hwj chim theem los ntawm tsawg dua 1W txog 100W yog xav tau nyob ntawm cov ntaub ntawv, tuab thiab xav tau txheej txheem ceev.
Solvent vuam
Nyob rau hauv hnyav welding, ib qho hnyav yog siv uas tuaj yeem yaj cov polymer ib ntus ntawm chav tsev kub.Thaum qhov no tshwm sim, cov saw hlau polymer yog dawb txav mus rau hauv cov kua thiab tuaj yeem sib xyaw nrog lwm cov chains zoo sib xws hauv lwm cov khoom.Muab sijhawm txaus, cov kuab tshuaj yuav nkag mus rau hauv cov polymer thiab tawm mus rau ib puag ncig, kom cov chains poob lawv txoj kev mus.Qhov no tawm ntawm cov khoom loj ntawm cov khoom sib txuas ntawm cov khoom siv polymer uas ua rau cov khoom hnyav.
Cov txheej txheem no feem ntau yog siv los txuas PVC thiab ABS yeeb nkab, xws li cov kav dej hauv tsev.Cov "gluing" ua ke ntawm cov yas (polycarbonate, polystyrene lossis ABS) qauv kuj yog cov txheej txheem vuam hnyav.
Post lub sij hawm: May-10-2018