ABS, feem ntau hu ua acrylonitrile butadiene styrene, yog tsim los ntawm kev sib xyaw ua ke ntawm peb lub monomers ntawm acrylonitrile-butadiene-styrene. Vim muaj qhov sib txawv ntawm peb lub monomers, tej zaum yuav muaj cov yam ntxwv thiab qhov kub yaj, kev txav mus los ntawm ABS, kev sib xyaw nrog lwm cov yas lossis cov khoom ntxiv, nws tuaj yeem nthuav dav kev siv thiab kev ua tau zoo ntawm ABS.
Qhov fluidity ntawm ABS yog nyob nruab nrab ntawm PS thiab PC, thiab nws cov fluidity yog cuam tshuam nrog qhov kub thiab siab ntawm kev txhaj tshuaj, thiab qhov cuam tshuam ntawm qhov siab ntawm kev txhaj tshuaj yog me ntsis loj dua. Yog li ntawd, qhov siab txhaj tshuaj siab dua feem ntau siv rau hauv kev txhaj tshuaj kom txo qhov viscosity yaj thiab txhim kho kev ua haujlwm ntawm pwm.
1. Kev ua yas
Tus nqi nqus dej ntawm ABS yog li ntawm 0.2% -0.8%. Rau ABS qib dav dav, nws yuav tsum tau ci hauv qhov cub ntawm 80-85 ° C rau 2-4 teev lossis hauv lub tshuab ziab ntawm 80 ° C rau 1-2 teev ua ntej ua tiav. Rau ABS uas tiv taus cua sov uas muaj cov khoom PC, qhov kub ziab yuav tsum tau nce kom haum rau 100 ° C, thiab lub sijhawm ziab tshwj xeeb tuaj yeem txiav txim siab los ntawm kev rho tawm cua.
Qhov feem pua ntawm cov khoom siv rov ua dua tshiab tsis tuaj yeem tshaj 30%, thiab electroplating qib ABS tsis tuaj yeem siv cov khoom siv rov ua dua tshiab.
2. Kev xaiv tshuab txhaj tshuaj molding
Ramada lub tshuab txhaj tshuaj molding txheem tuaj yeem xaiv tau (qhov sib piv ntawm qhov ntev ntawm cov ntsia hlau thiab txoj kab uas hla yog 20:1, qhov sib piv ntawm kev nias ntau dua 2, qhov siab ntawm kev txhaj tshuaj ntau dua 1500bar). Yog tias siv cov xim masterbatch lossis cov khoom zoo li cas siab, koj tuaj yeem xaiv cov ntsia hlau uas muaj txoj kab uas hla me dua. Lub zog clamping yog txiav txim siab raws li 4700-6200t / m2, uas nyob ntawm qib yas thiab cov khoom xav tau.
3. Tsim pwm thiab rooj vag
Qhov kub ntawm pwm tuaj yeem teeb tsa ntawm 60-65 ° C. Txoj kab uas hla ntawm tus khiav yog 6-8 hli. Lub qhov rooj dav yog li 3 hli, qhov tuab yog tib yam li cov khoom, thiab qhov ntev ntawm lub qhov rooj yuav tsum tsawg dua 1 hli. Lub qhov cua yog 4-6 hli dav thiab 0.025-0.05 hli tuab.
4. Kub yaj
Nws tuaj yeem txiav txim siab tau raws li qhov tseeb los ntawm txoj kev txhaj tshuaj cua. Cov qib sib txawv muaj qhov kub yaj sib txawv, qhov chaw pom zoo yog raws li nram no:
Qib cuam tshuam: 220 ° C-260 ° C, zoo dua 250 ° C
Qib electroplating: 250 ° C-275 ° C, zoo dua 270 ° C
Qib tiv taus kub: 240 ° C-280 ° C, zoo dua 265 ° C-270 ° C
Qib tiv taus hluav taws: 200 ° C-240 ° C, zoo dua yog 220 ° C-230 ° C
Qib pob tshab: 230 ° C-260 ° C, zoo dua 245 ° C
Cov iav fiber reinforced qib: 230 ℃ -270 ℃
Rau cov khoom uas muaj qhov xav tau ntawm qhov chaw siab, siv qhov kub yaj thiab qhov kub pwm siab dua.
5. Kev txhaj tshuaj ceev
Siv qhov ceev qeeb rau qib uas tiv taus hluav taws, thiab siv qhov ceev ceev rau qib uas tiv taus cua sov. Yog tias qhov xav tau ntawm qhov chaw ntawm cov khoom yog siab, yuav tsum siv kev tswj qhov ceev ntawm kev txhaj tshuaj molding uas ceev thiab ntau theem.
6. Rov qab siab
Feem ntau, qhov qis dua qhov siab rov qab, qhov zoo dua. Qhov siab rov qab siv feem ntau yog 5bar, thiab cov khoom siv zas xim xav tau qhov siab rov qab siab dua kom ua rau cov xim sib xyaw ua ke.
7. Lub sijhawm nyob
Thaum kub txog 265°C, lub sijhawm uas ABS nyob hauv lub tog raj kheej yaj yuav tsum tsis pub tshaj 5-6 feeb. Lub sijhawm tiv thaiv hluav taws luv dua. Yog tias yuav tsum nres lub tshuab, qhov kub uas tau teeb tsa yuav tsum txo qis mus rau 100°C ua ntej, thiab tom qab ntawd lub tog raj kheej yas yaj yuav tsum tau ntxuav nrog ABS dav dav. Cov khoom sib tov uas tau ntxuav yuav tsum tau muab tso rau hauv dej txias kom tiv thaiv kev lwj ntxiv. Yog tias koj xav tau hloov ntawm lwm cov yas mus rau ABS, koj yuav tsum xub ntxuav lub tog raj kheej yas yaj nrog PS, PMMA lossis PE. Qee cov khoom ABS tsis muaj teeb meem thaum lawv nyuam qhuav tawm ntawm pwm, tab sis lawv yuav hloov xim tom qab ib ntus, uas yuav tshwm sim los ntawm kev kub dhau lossis cov yas nyob hauv lub tog raj kheej yaj ntev dhau.
8. Kev ua tiav cov khoom tom qab
Feem ntau, cov khoom ABS tsis tas yuav ua tiav tom qab, tsuas yog cov khoom siv electroplating qib yuav tsum tau ci (70-80 ° C, 2-4 teev) kom passivate cov cim nto, thiab cov khoom uas xav 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 coj tawm.
9. Tej yam uas xav tau kev saib xyuas tshwj xeeb thaum molding
Muaj ntau qib ntawm ABS (tshwj xeeb tshaj yog qib nplaim taws retardant), uas yaj nws muaj zog lo rau ntawm qhov chaw ntawm lub hau tom qab plasticization, thiab yuav decompose tom qab lub sijhawm ntev. Thaum qhov xwm txheej saum toj no tshwm sim, nws yog ib qho tsim nyog los rub tawm qhov seem homogenization ntawm lub hau thiab lub compressor rau so, thiab tsis tu ncua ntxuav lub hau nrog PS, thiab lwm yam.
Lub sijhawm tshaj tawm: Lub Yim Hli-09-2023
