ABS yasoccupies ib tug tseem ceeb txoj hauj lwm nyob rau hauv lub electronics kev lag luam, machinery kev lag luam, tsheb thauj mus los, tsev cov ntaub ntawv, cov khoom ua si tsim thiab lwm yam lag luam vim nws cov neeg kho tshuab siab zog thiab zoo kev ua tau zoo, tshwj xeeb tshaj yog rau me ntsis loj lub thawv qauv thiab kev ntxhov siab Cheebtsam. , cov khoom siv kho kom zoo nkauj uas xav tau electroplating yog sib cais los ntawm cov yas no.
1. Kev ziab ntawm ABS yas
ABS yas muaj siab hygroscopicity thiab siab rhiab heev rau ya raws. Kev ziab kom txaus thiab preheating ua ntej ua tsis tau tsuas yog tshem tawm cov foob pob hluav taws zoo li npuas thiab nyiaj xov ntawm qhov chaw ua haujlwm los ntawm dej vapor, tab sis kuj pab cov yas tsim, txo cov stain thiab moiré ntawm qhov chaw ua haujlwm. Cov dej noo ntawm ABS raw cov ntaub ntawv yuav tsum tau tswj hauv qab 0.13%.
Qhuav tej yam kev mob ua ntej txhaj tshuaj molding: nyob rau hauv lub caij ntuj no, qhov kub thiab txias yuav tsum nyob rau hauv 75-80 ℃, thiab kav rau 2-3 teev; Nyob rau lub caij ntuj sov, qhov kub yuav tsum qis dua 80-90 ℃ thiab kav ntev li 4-8 teev. Yog hais tias lub workpiece xav tau glossy los yog lub workpiece nws tus kheej yog complex, lub sij hawm ziab yuav tsum ntev dua, mus txog 8 mus rau 16 teev.
Vim muaj cov kab dej noo, huab cua ntawm qhov chaw yog ib qho teeb meem uas feem ntau tsis saib xyuas. Nws yog qhov zoo tshaj plaws los hloov lub hopper ntawm lub tshuab mus rau hauv lub tshuab cua kub hopper kom tiv thaiv cov ABS qhuav los ntawm absorbing noo noo dua nyob rau hauv lub hopper. Txhim kho cov av noo kom tsis txhob overheating ntawm cov ntaub ntawv thaum ntau lawm cuam tshuam.
2. Kev txhaj tshuaj kub
Kev sib raug zoo ntawm qhov kub thiab txias viscosity ntawm ABS yas yog txawv ntawm lwm yam amorphous plastics. Thaum qhov kub nce thaum lub sij hawm melting txheej txheem, lub melting yeej txo qis heev, tab sis ib zaug nws mus txog rau lub plasticizing kub (qhov kub ntau haum rau kev ua, xws li 220 ~ 250 ℃), yog hais tias qhov kub thiab txias txuas ntxiv mus rau qhov muag tsis pom kev, qhov kub tsis kam. yuav tsis siab dhau. Lub thermal degradation ntawm ABS nce lub yaj viscosity, uatxhaj tshuaj moldingnyuaj dua, thiab cov khoom siv kho tshuab ntawm cov khoom kuj poob qis.
Yog li ntawd, qhov kev txhaj tshuaj kub ntawm ABS yog siab dua li ntawm cov yas xws li polystyrene, tab sis nws tsis tuaj yeem muaj qhov ntsuas kub ntau dua li qhov tom kawg. Rau qee qhov kev txhaj tshuaj molding tshuab nrog kev tswj tsis zoo, thaum tsim cov khoom ABS nce mus txog qee tus lej, nws feem ntau pom tias cov xim daj lossis xim av coking tau kos rau hauv qhov chaw, thiab nws nyuaj rau tshem tawm.
Yog vim li cas yog tias ABS yas muaj cov khoom siv butadiene. Thaum cov khoom yas ruaj khov ua rau qee qhov chaw hauv cov ntsia hlau zawj uas tsis yooj yim rau kev ntxuav ntawm qhov kub thiab txias, thiab raug kub siab mus ntev, nws yuav ua rau degradation thiab carbonization. Txij li thaum kub kub ua haujlwm yuav ua rau muaj teeb meem rau ABS, nws yog ib qho tsim nyog los txwv qhov kub ntawm qhov cub ntawm txhua ntu ntawm lub thoob. Tau kawg, ntau hom thiab cov khoom sib xyaw ntawm ABS muaj qhov sib txawv siv rau qhov cub kub. Xws li lub tshuab plunger, lub cub tawg kub yog khaws cia ntawm 180 ~ 230 ℃; thiab ntsia hlau tshuab, lub cub tawg kub yog khaws cia ntawm 160 ~ 220 ℃.
Nws yog ib qho tseem ceeb uas yuav tsum tau hais tias, vim yog qhov kub ntawm ABS, nws yog qhov nkag siab zoo rau kev hloov pauv hauv ntau yam txheej txheem. Yog li ntawd, kev tswj qhov kub thiab txias ntawm qhov kawg ntawm lub thoob thiab lub nozzle yog ib qho tseem ceeb heev. Kev xyaum tau ua pov thawj tias qee qhov kev hloov pauv me me hauv ob ntu no yuav tshwm sim hauv ntu. Qhov kub hloov pauv ntau dua, yuav ua rau muaj qhov tsis xws luag xws li weld seam, tsis zoo gloss, flash, pwm sticking, discoloration thiab lwm yam.
3. Kev txhaj tshuaj siab
Lub viscosity ntawm ABS melted qhov chaw yog siab dua li ntawm polystyrene lossis hloov polystyrene, yog li kev txhaj tshuaj ntau dua yog siv thaum txhaj tshuaj. Tau kawg, tsis yog txhua qhov ABS yuav tsum muaj kev kub siab, thiab kev txhaj tshuaj qis tuaj yeem siv rau qhov me me, yooj yim, thiab tuab.
Thaum lub sij hawm txhaj tshuaj, lub siab nyob rau hauv cov kab noj hniav nyob rau hauv lub sij hawm thaum lub rooj vag kaw feem ntau txiav txim siab qhov zoo ntawm qhov chaw thiab cov degree ntawm silver filamentous defects. Yog tias qhov siab me dhau lawm, cov yas yuav qis heev, thiab muaj feem ntau ntawm kev sib cuag nrog cov kab noj hniav, thiab qhov chaw ntawm lub workpiece yog atomized. Yog tias lub siab loj dhau lawm, kev sib txhuam ntawm cov yas thiab cov kab noj hniav yog qhov muaj zog, uas yog ib qho yooj yim los ua cov nplaum.
4. Kev txhaj tshuaj ceev
Rau cov khoom siv ABS, nws yog qhov zoo dua los txhaj rau hauv nruab nrab ceev. Thaum qhov kev txhaj tshuaj nrawm dhau lawm, cov yas yog yooj yim rau scorched los yog decomposed thiab gasified, uas yuav ua rau muaj kev tsis xws luag xws li weld seams, tsis zoo gloss thiab redness ntawm cov yas nyob ze ntawm lub rooj vag. Txawm li cas los xij, thaum tsim cov phab ntsa nyias nyias thiab qhov nyuaj, nws tseem yuav tsum tau ua kom muaj kev txhaj tshuaj txaus txaus, txwv tsis pub nws yuav nyuaj rau sau.
5. Pwm kub
Lub molding kub ntawm ABS yog kuj siab, nrog rau cov pwm kub. Feem ntau, pwm kub yog kho rau 75-85 ° C. Thaum tsim cov khoom nrog thaj tsam loj, qhov ntsuas kub ruaj khov yuav tsum yog 70 txog 80 ° C, thiab cov pwm txav tuaj yeem yuav tsum yog 50 txog 60 ° C. Thaum txhaj tshuaj loj, complex, nyias-walled qhov chaw, tshwj xeeb cua sov ntawm pwm yuav tsum xav txog. Txhawm rau ua kom luv luv lub voj voog ntau lawm thiab tswj xyuas qhov kev ruaj ntseg ntawm pwm pwm, tom qab cov khoom raug tshem tawm, da dej txias, da dej kub lossis lwm yam txheej txheem kev teeb tsa tuaj yeem siv los them nyiaj rau lub caij txias kho lub sijhawm hauv kab noj hniav.
Post lub sij hawm: Apr-13-2022
