Txo kev ntxhov siab sab hauv yog qhov tseem ceeb ntawm qhovtxhaj tshuaj moldingntawm tshav kub-resistant ABS. Hauv daim ntawv no, tus neeg sau sib koom ua cov txheej txheem kev ua tiav ntawm tshav kub-resistant ABS ua los ntawm tsib yam: pwm tsim, khoom qhuav, molding kub, ntim siab thiab lub sijhawm, pwm kub.
Kev tshav kub ua hauj ntawm ABS dog dig tsis zoo txaus. Tam sim no, ntau cov txheej txheem ntawm tshav kub-tiv thaiv ABS resins tau tsim los ntawm kev ntxiv cov kab mob tiv thaiv tshav kub xws li α - methylstyrene copolymer thiab N-phenylmaleimide copolymer. Qhov kub kub deformation kub (HDT) yog 90-120 ℃.
Vim tias cov qauv tsim los ntawm tshav kub-resistant ABS muaj lub nplhaib siab heev benzene thiab N-phenyl pab pawg, qhov ua haujlwm tiv thaiv tshav kub tau zoo dua, thiab cov teebmeem kev tsis haum xeeb ntawm cov xovtooj molecular tseem nce ntxiv, yog li qhov ua kom lub nrawm ntawm molecular saw txo, thiab cov khoom lag luam yooj yim kom muaj kev ntxhov siab loj hauv nruab siab, uas ua rau tawg tawg, ntxhov siab ntxuav hniav dawb, khoom brittleness thiab lwm yam tsis xws luag. Yog li, txo qhov kev ntxhov siab sab hauv ntawm cov khoom yog qhov tseem ceeb ntawm kev txhaj tshuaj txhaj tshuaj tiv thaiv kev kub hnyiab ABS.
Khoom pwm tsim
Phab ntsa tuab sib txawv ntawm ABS cov khoom yuav tsum tswj tsis pub dhau 25% los tiv thaiv kev ntxhov siab hauv cheeb tsam los ntawm ntau cov phab ntsa tuab sib txawv. Txhawm rau tiv thaiv lub kem los ntawm kev tawg, lub kaum R yuav tsum tau ntxiv lossis cov hlua khi yuav tsum tau ntxiv rau ntawm lub hauv paus ntawm kem nrog lub zog tsis muaj zog.
Hauv cov qauv tsim buckle, lub hauv paus ntawm buckle xav tau lub kaum sab xis inverted. Qhov loj ntawm R lub kaum yog nyob ntawm phab ntsa tuab ntawm cov khoom. Qhov piv ntawm R kaum rau phab ntsa tuab yuav tsum siab dua 0.3. Nrog rau qhov nce ntawm qhov feem pua no, kev ntxhov siab sab hauv maj mam poob qis, tab sis sab ntsej muag shrinkage ntawm cov khoom yuav tsum raug txiav txim siab. Tus qauv tsim ntawm cov cua txias channel yuav tsum xyuas kom meej sib xws ntawm kev ua kom txias thiab zam kom tsis txhob muaj kev ntxhov siab sab hauv los ntawm kev txias txias thiab tsis sib xws.
Cov khoom kom qhuav
Feem ntau, ABS cov khoom ua rau kub yuav nqus cov dej noo hauv huab cua thaum lub sijhawm khaws cia thiab tsheb thauj mus los, thiab tus nqi nqus dej nws txawv nrog huab cua noo, feem ntau ntawm 0.2% thiab 0.4%. Yog li, cov khoom yuav tsum tau tag nrho cov ziab kom txo cov dej noo ntawm cov khoom kom qis dua 0.05%, dua li qis dua 0.02%. Txwv tsis pub, qhov teeb meem saum npoo xws li txaws thiab nyiaj xov nyiaj yuav tshwm sim. Qhov kub kom qhuav ntawm qhov kub tsis kam tiv thaiv ABS cov khoom ntxaum dej siab dua li ntawm qhov tsis zoo ntawm ABS, feem ntau 80-95 ℃, thiab lub sijhawm ziab yog 3-4 teev.
Kev txhaj tshuaj kub
Kev ntsuas kub siab pwm yog qhov ntsuas tsis tau uas yuav tsum tau them nyiaj tshwj xeeb rau thaum lub sijhawm ua kom kub ABS tsis txhob kub. Nws qhov chaw teeb tsa yog ua raws li paub tseeb tias ABS-thaum tshav kub kub tiv thaiv tag nrho cov tshuab yas. Qhov ntsuas kub siab dua tus nqi nruab nrab ntawm molding kub pom zoo los ntawm tus neeg xa khoom yuav tsum siv kom deb li deb tau. Qhov nce ntawm molding kub yuav ua rau txo qhov viscosity ntawm tshav kub-resistant ABS, ua kom cov npliag ntawm cov dej ua kom zoo, thiab ua kom cov dej ntws kom nrug ntev dua, thiaj li ua kom paub tseeb tias cov khoom muaj txaus puv peev.
Tuav lub siab thiab lub sijhawm
Rau kev tiv thaiv tshav kub ABS, txawm hais tias qhov teeb tsa ntawm kev tuav lub siab thiab lub sijhawm yog tsim nyog lossis tsis cuam tshuam ncaj qha rau qhov loj ntawm kev ntxhov siab sab hauv hauv cov ntu. Nrog rau qhov nce ntawm ntim siab, qhov sib txawv molecular yuav tsawg dua, qhov ntau ntawm cov saw ntu kev ua haujlwm yuav raug txo kom tsawg, qhov ntim ntawm yaj yuav txo, qhov ntwm yuav nce ntxiv, thiab qhov quab yuam ntawm molecules yuav nce, uas tuaj yeem txhim kho lub ntsws thiab sab hauv cov khoom lag luam, tab sis yuav ua rau kev nce ntawm kev ntxhov siab sab hauv. Yog li ntawd, nyob rau hauv qhov chaw ua ntej kom ntseeg tau tias cov khoom zoo ntawm cov khoom, qis dua ntim khoom lag luam yuav tsum xaiv cov kev lag luam kom deb li deb tau.
Lub sij hawm tuav tau tsim raws li lub sijhawm thaum lub rooj vag ruaj khov nrog kev ua kom txias, thiab lub hau ntswj tau thawb mus tom ntej thiab tsis muaj lub siab los thov rau cov khoom lag luam molded. Yog tias lub sijhawm tuav ntawv ntev dhau lawm, cov khoom yuav sau ntau dhau lawm, qhov khoob ntawm molecular yuav tsawg dua, thiab kev ntxhov siab sab hauv yuav raug nce; yog tias lub sijhawm tuav luv heev, cov khoom yuav yaig yooj yim thiab qhov loj yuav tsis ruaj khov. Lub sijhawm tuav zoo tshaj yuav tsum yog lub sijhawm luv tshaj thaum lub sijhawm nyhav ntawm cov khoom tsis hloov.
Pwm kub
Thaum moulding kub-resistant ABS, pwm kub tshuab siv los tswj pwm kub. Qhov pom zoo rau pwm kub yog 60-80 ℃. Tshaj pwm siab yuav ua rau muaj kev khiav zoo, ntau dua weld kab lub zog thiab cov khoom lag luam qis dua kev ntxhov siab, tab sis lub voj voog molding yuav ua kom ntev.
Yog tias pwm kub qis dua qhov ntsuas kub uas tau pom zoo, qhov kev ntxhov siab sab hauv ntawm cov khoom yuav dhau lawm, kev ua haujlwm ntawm cov khoom yuav raug txo, thiab qee qhov tshwm sim tsis xws li brittle crack, ntsia hlau qhov tawg lossis txau pleev xim tawg yuav tshwm sim.
