ABS, yomwe imadziwika kuti acrylonitrile butadiene styrene, imapangidwa ndi copolymerization ya ma monomers atatu a acrylonitrile-butadiene-styrene. Chifukwa cha kuchuluka kosiyana kwa ma monomers atatu, pakhoza kukhala zinthu zosiyanasiyana komanso kutentha kosungunuka, magwiridwe antchito a ABS, kusakanikirana ndi mapulasitiki ena kapena zowonjezera, kumatha kukulitsa kugwiritsa ntchito ndi magwiridwe antchito a ABS.
Kusinthasintha kwa ABS kuli pakati pa PS ndi PC, ndipo kusinthasintha kwake kumakhudzana ndi kutentha ndi kupanikizika kwa jakisoni, ndipo mphamvu ya kupanikizika kwa jakisoni ndi yayikulu pang'ono. Chifukwa chake, kupanikizika kwakukulu kwa jakisoni nthawi zambiri kumagwiritsidwa ntchito popanga utomoni kuti achepetse kukhuthala kwa kusungunuka ndikuwonjezera magwiridwe antchito a kudzaza kwa nkhungu.
1. Kukonza pulasitiki
Kuchuluka kwa madzi a ABS ndi pafupifupi 0.2%-0.8%. Pa ABS ya kalasi yonse, iyenera kuphikidwa mu uvuni pa 80-85°C kwa maola 2-4 kapena mu chowumitsira chowumitsira pa 80°C kwa maola 1-2 musanagwiritse ntchito. Pa ABS yosatentha yokhala ndi zigawo za PC, kutentha kwa kuumitsa kuyenera kukwezedwa moyenera kufika pa 100°C, ndipo nthawi yeniyeni yowumitsa ikhoza kudziwika ndi kutulutsa mpweya.
Chiŵerengero cha zinthu zobwezerezedwanso sichingapitirire 30%, ndipo electroplating grade ABS singagwiritse ntchito zinthu zobwezerezedwanso.
2. Kusankha makina opangira jakisoni
Makina ojambulira jakisoni a Ramada amatha kusankhidwa (kutalika kwa sikuru mpaka m'mimba mwake ndi 20:1, chiŵerengero cha kupsinjika choposa 2, kuthamanga kwa jakisoni koposa 1500bar). Ngati mtundu wa masterbatch ukugwiritsidwa ntchito kapena mawonekedwe a chinthucho ndi okwera, sikuru yokhala ndi m'mimba mwake wocheperako ingasankhidwe. Mphamvu yolumikizira imatsimikiziridwa malinga ndi 4700-6200t/m2, zomwe zimatengera mtundu wa pulasitiki ndi zofunikira za chinthucho.
3. Kapangidwe ka nkhungu ndi chipata
Kutentha kwa nkhungu kumatha kukhazikitsidwa pa 60-65°C. M'mimba mwake wa chipata ndi 6-8mm. M'lifupi mwa chipata ndi pafupifupi 3mm, makulidwe ake ndi ofanana ndi a chinthucho, ndipo kutalika kwa chipata kuyenera kukhala kochepera 1mm. Bowo lotulukira mpweya ndi 4-6mm mulifupi ndi 0.025-0.05mm makulidwe.
4. Kutentha kwa sungunuka
Itha kudziwika bwino pogwiritsa ntchito njira yopangira mpweya. Magiredi osiyanasiyana ali ndi kutentha kosiyana kwa kusungunuka, makonda omwe akulimbikitsidwa ndi awa:
Mlingo wa mphamvu: 220°C-260°C, makamaka 250°C
Giredi yopangira ma electroplating: 250°C-275°C, makamaka 270°C
Chigawo chosagwira kutentha: 240°C-280°C, makamaka 265°C-270°C
Mtundu woletsa moto: 200°C-240°C, makamaka 220°C-230°C
Giredi yowonekera bwino: 230°C-260°C, makamaka 245°C
Galasi yolimbitsa ulusi wagalasi: 230℃ -270℃
Pazinthu zomwe zimafunika kwambiri pamwamba, gwiritsani ntchito kutentha kwakukulu kwa kusungunuka ndi kutentha kwa nkhungu.
5. Liwiro la jakisoni
Liwiro lochepa limagwiritsidwa ntchito pa mtundu wosapsa ndi moto, ndipo liwiro lofulumira limagwiritsidwa ntchito pa mtundu wosapsa ndi kutentha. Ngati zofunikira pamwamba pa chinthucho zili zapamwamba, jakisoni wopangira jakisoni wothamanga kwambiri komanso wa magawo ambiri uyenera kugwiritsidwa ntchito.
6. Kupanikizika kwa msana
Kawirikawiri, kuthamanga kwa kumbuyo kumakhala kotsika, ndipo kumakhala bwino. Kuthamanga kwa kumbuyo komwe kumagwiritsidwa ntchito nthawi zambiri ndi 5bar, ndipo utoto wa nsalu umafunika kuthamanga kwa kumbuyo kwambiri kuti mitundu isakanizike mofanana.
7. Nthawi yokhala
Pa kutentha kwa 265°C, nthawi yokhalamo ya ABS mu silinda yosungunuka siyenera kupitirira mphindi 5-6. Nthawi yoletsa moto ndi yochepa. Ngati pakufunika kuyimitsa makinawo, kutentha komwe kwayikidwa kuyenera kuchepetsedwa kufika pa 100°C kaye, kenako silinda ya pulasitiki yosungunuka iyenera kutsukidwa ndi ABS yogwiritsidwa ntchito nthawi zonse. Chosakaniza chotsukidwacho chiyenera kuyikidwa m'madzi ozizira kuti chisawonongekenso. Ngati mukufuna kusintha kuchoka ku mapulasitiki ena kupita ku ABS, choyamba muyenera kuyeretsa silinda ya pulasitiki yosungunuka ndi PS, PMMA kapena PE. Zinthu zina za ABS sizili ndi vuto zikangotulutsidwa mu nkhungu, koma zimasintha mtundu pakapita nthawi, zomwe zingachitike chifukwa cha kutentha kwambiri kapena pulasitiki kukhala mu silinda yosungunuka kwa nthawi yayitali.
8. Kukonza zinthu pambuyo pa kukonza
Kawirikawiri, zinthu za ABS sizifunikira kukonzedwa pambuyo pake, zinthu zokhazo zomwe zimaphikidwa ndi electroplating ziyenera kuphikidwa (70-80°C, maola 2-4) kuti zichotse zizindikiro pamwamba, ndipo zinthu zomwe ziyenera kuphikidwa ndi electroplating sizingagwiritse ntchito chotulutsira, ndipo zinthuzo ziyenera kupakidwa nthawi yomweyo zitachotsedwa.
9. Zinthu zofunika kuziganizira kwambiri popanga zinthu
Pali mitundu ingapo ya ABS (makamaka mtundu woletsa moto), womwe umasungunuka umamatira kwambiri pamwamba pa sikuruu pambuyo popangidwa kukhala pulasitiki, ndipo umawola pakapita nthawi yayitali. Zinthu zikachitika pamwambapa, ndikofunikira kutulutsa gawo la homogenization ya sikuruu ndi compressor kuti mupukute, ndikutsuka sikuruu nthawi zonse ndi PS, ndi zina zotero.
Nthawi yotumizira: Ogasiti-09-2023
