ABS, feem ntau hu ua acrylonitrile butadiene styrene, yog tsim los ntawm copolymerization ntawm peb monomers ntawm acrylonitrile-butadiene-styrene. Vim muaj qhov sib txawv ntawm peb lub monomers, tuaj yeem muaj cov khoom sib txawv thiab qhov kub thiab txias, kev txav mus los ntawm ABS, sib xyaw nrog lwm cov yas lossis cov khoom siv ntxiv, nws tuaj yeem nthuav dav siv thiab ua haujlwm ntawm ABS.
Lub fluidity ntawm ABS yog nruab nrab ntawm PS thiab PC, thiab nws cov fluidity muaj feem xyuam rau kev txhaj tshuaj kub thiab siab, thiab lub zog ntawm kev txhaj tshuaj yog me ntsis ntau dua. Yog li ntawd, kev txhaj tshuaj siab dua yog feem ntau siv hauv molding kom txo cov viscosity yaj thiab txhim kho pwm filling. kev ua tau zoo.
1. Kev ua cov yas
Kev nqus dej ntawm ABS yog li 0.2% -0.8%. Rau cov qib ABS dav dav, nws yuav tsum tau ci hauv qhov cub ntawm 80-85 ° C rau 2-4 teev lossis hauv qhov ziab kom qhuav ntawm 80 ° C rau 1-2 teev ua ntej ua haujlwm. Rau qhov kub-resistant ABS uas muaj cov khoom siv PC, qhov ziab kom qhuav yuav tsum tsim nyog nce mus txog 100 ° C, thiab lub sijhawm ziab tshwj xeeb tuaj yeem txiav txim siab los ntawm huab cua extrusion.
Qhov feem ntawm cov khoom siv rov ua dua tsis tuaj yeem siab dua 30%, thiab qib electroplating ABS tsis tuaj yeem siv cov khoom siv rov ua dua.
2. Kev xaiv ntawm kev txhaj tshuaj molding tshuab
Ramada tus qauv txhaj tshuaj molding tshuab tuaj yeem xaiv tau (ntsuas qhov ntev-rau-qhov sib piv 20: 1, compression piv ntau dua 2, txhaj tshuaj siab tshaj 1500bar). Yog tias cov xim masterbatch siv los yog cov tsos ntawm cov khoom yog siab, ib tug ntsia hlau nrog ib tug me me txoj kab uas hla yuav xaiv tau. Lub zog clamping yog txiav txim siab raws li 4700-6200t / m2, uas nyob ntawm qib yas thiab cov khoom yuav tsum tau ua.
3. Pwm thiab rooj vag tsim
Cov pwm kub tuaj yeem teem rau ntawm 60-65 ° C. Khiav txoj kab uas hla 6-8mm. Lub rooj vag dav yog li 3 hli, lub thickness yog tib yam li ntawm cov khoom, thiab lub rooj vag ntev yuav tsum tsawg dua 1 hli. Lub qhov taub yog 4-6mm dav thiab 0.025-0.05mm tuab.
4. Melt kub
Nws tuaj yeem raug txiav txim siab los ntawm txoj kev txhaj tshuaj huab cua. Cov qib sib txawv muaj qhov sib txawv ntawm qhov kub thiab txias, qhov kev pom zoo yog raws li hauv qab no:
Kev cuam tshuam qib: 220 ° C-260 ° C, nyiam dua 250 ° C
Electroplating qib: 250 ° C-275 ° C, nyiam dua 270 ° C
Kub-resistant qib: 240 ° C-280 ° C, nyiam dua 265 ° C-270 ° C
Cov nplaim hluav taws kub: 200 ° C-240 ° C, nyiam dua 220 ° C-230 ° C
Pob tshab qib: 230 ° C-260 ° C, nyiam dua 245 ° C
iav fiber reinforced qib: 230 ℃ - 270 ℃
Rau cov khoom uas muaj qhov yuav tsum tau muaj saum npoo, siv ntau dua melt kub thiab pwm kub.
5. Kev txhaj tshuaj ceev
Kev nrawm nrawm yog siv rau qib hluav taws-resistant, thiab ceev ceev yog siv rau qib kub-resistant. Yog tias qhov kev xav tau saum npoo ntawm cov khoom yog siab, kev kub ceev thiab ntau theem kev txhaj tshuaj molding txhaj tshuaj yuav tsum tau siv.
6. Rov qab siab
Feem ntau, qhov qis rov qab siab, qhov zoo dua. Qhov feem ntau siv rov qab siab yog 5bar, thiab cov khoom siv dyeing xav tau siab dua rov qab los ua kom cov xim sib xyaw.
7. Lub sijhawm nyob
Ntawm qhov kub ntawm 265 ° C, lub sijhawm nyob ntawm ABS hauv lub tog raj kheej yaj yuav tsum tsis pub tshaj 5-6 feeb. Cov nplaim hluav taws kub lub sij hawm luv dua. Yog tias tsim nyog yuav tsum nres lub tshuab, qhov ntsuas kub yuav tsum tau txo qis rau 100 ° C ua ntej, thiab tom qab ntawd cov yas lub tog raj kheej yuav tsum tau muab ntxuav nrog lub hom phiaj dav dav ABS. Cov sib tov ntxuav yuav tsum muab tso rau hauv dej txias kom tsis txhob decomposition ntxiv. Yog tias koj xav tau hloov los ntawm lwm cov yas rau ABS, koj yuav tsum xub ntxuav lub plhaub yas yas nrog PS, PMMA lossis PE. Qee cov khoom ABS tsis muaj teeb meem thaum lawv nyuam qhuav tso tawm ntawm cov pwm, tab sis lawv yuav hloov xim tom qab lub sijhawm, uas yuav tshwm sim los ntawm overheating los yog cov yas nyob hauv lub tog raj kheej yaj ntev dhau lawm.
8. Tom qab ua tiav cov khoom
Feem ntau, ABS cov khoom tsis xav tau tom qab ua tiav, tsuas yog cov khoom lag luam qib electroplating yuav tsum tau muab ci (70-80 ° C, 2-4 teev) kom dhau cov cim saum npoo, thiab cov khoom uas yuav tsum tau electroplated tsis tuaj yeem siv tus neeg sawv cev tso tawm. , thiab cov khoom yuav tsum tau ntim tam sim ntawd tom qab lawv raug tshem tawm.
9. Cov teeb meem xav tau kev saib xyuas tshwj xeeb thaum molding
Muaj ntau qib ntawm ABS (tshwj xeeb tshaj yog cov nplaim hluav taws kub), cov yaj uas muaj zog adhesion rau saum npoo ntawm cov ntsia hlau tom qab plasticization, thiab yuav decompose tom qab ntev. Thaum qhov teeb meem saum toj no tshwm sim, nws yuav tsum tau rub tawm cov ntsia hlau homogenization seem thiab compressor rau so, thiab tsis tu ncua ntxuav cov ntsia hlau nrog PS, thiab lwm yam.
Post lub sij hawm: Aug-09-2023