BMC ndi chidule chaBulk Molding Compoundmu Chingerezi, dzina lachi China ndi Bulk Molding Compound (lomwe limatchedwanso: unsaturated polyester glass fiber reinforced Bulk Molding Compound) ndi utomoni wamadzimadzi, wothandizira otsika, crosslinking agent, initiator, filler, short-cut glass fiber flakes ndi zigawo zina za kusakaniza kwa thupi la zovuta, kutentha ndi kupanikizika, kuphatikizika kwa polymer unsaturated kumachitika. Pansi pa kutentha ndi kukakamizidwa, poliyesitala wosaturated ndi styrene zimalumikizidwa ndikuchiritsidwa ndi polymerization reaction. Mawotchi ake abwino kwambiri komanso zinthu zabwino kwambiri zamagetsi, komanso kukana kutentha komanso kukonza bwino kumagwiritsidwa ntchito kwambiri pazida zamagetsi, zida, kupanga magalimoto, ndege, zoyendera, zomanga.
Kupanga dongosolo
1. Unsaturated polyester resin: ndi smc/bmc utomoni wapadera, makamaka m-phenyl mmwamba, kukana mphamvu, kukana dzimbiri, kukana kwa arc, oyenera kupanga chipika kapena zinthu za anisotropic
2. Crosslinking wothandizira; ndi monomer styrene, kuchuluka kwa up30% ~ 40%, kutengera zomwe zili zomangira pawiri mu poliyesitala wopanda unsaturated ndi gawo la zomangira zapawiri ndi zomangira ziwiri za cis, kuchuluka kwakukulu kwa ma crosslinking monomers, kumatha kuchiritsa kotheratu.
3. The initiator ndi mkulu kutentha kuchiritsa wothandizila, tert-butyl peroxybenzoate (TBPB) ndi wa ambiri ntchito mkulu kutentha wothandizila, madzi kuwola kutentha 104 akamaumba kutentha 135 mpaka 160 madigiri.
4. Low shrinkage wothandizira ambiri ntchito thermoplastic resins, ntchito kukulitsa kutentha kuti athetsere akamaumba contraction. Nthawi zambiri, kuchepa kwa zinthuzo kuyenera kuyendetsedwa pa 0.1 ~ 0.3%, chifukwa chake mlingo uyenera kuyendetsedwa mosamalitsa.
5. Zida zolimbikitsira: ambiri ntchito lumikiza kukonzedwa 6 ~ 12mm yaitali ulusi lalifupi lalifupi 6 lawi retardant ntchito Al2O3.3H2O-based, kuwonjezera pang'ono phosphorous munali flame retardant, hydrated aluminiyamu amakhalanso ndi udindo filler 7. Fillers akhoza kuchepetsa mtengo kuwongolera katundu magetsi ndi lawi retardancy. Calcium carbonate ndiye chodzaza chotalika kwambiri chomwe chimagwiritsidwa ntchito bwino, nthawi zambiri chimakhala chowoneka bwino, chopondera mukamaphatikiza mankhwala ndikuwonjezedwa.
Njira ya BMC
1. Samalani kutsatana kwa zinthu zowonjezera. Wosakaniza mu makina opondera amtundu wa z, makina opondera ali ndi chipangizo chotenthetsera, ngati kusakaniza kuli yunifolomu kumatha kuwonedwa phala lamtundu kapena mtundu wa kaboni wofanana, pafupifupi 15 ~ 18 mphindi.
2. Magalasi odulidwa afupikitsa kuti agwirizane ndi otsiriza, oyambirira kuti agwirizane ndi ulusi wambiri wosweka, zomwe zimakhudza mphamvu ya
3. BMC zakuthupi ziyenera kusungidwa pa kutentha otsika, zambiri pa 10 digiri Celsius, kutentha ndi mkulu, unsaturated utomoni n'zosavuta kuwoloka olumikiza ndi kuchiritsa, ndiyeno processing akamaumba zovuta.
4. Akamaumba kutentha: 140 madigiri kapena kotero, chapamwamba ndi m'munsi nkhungu kutentha 5 ~ 10 madigiri, akamaumba kuthamanga 7mpa kapena kotero, akugwira nthawi 40 ~ 80s/mm
Kuzindikira kwa mafakitale
1. Kusweka kwazinthu: vuto losweka lazinthu ndilofala, makamaka m'nyengo yozizira yotsika kutentha. Zomwe zimatchedwa kusweka zimatanthawuza zomwe zimapangidwa ndi kupsinjika kwamkati, zotsatira zakunja kapena zochitika zachilengedwe ndi zina zomwe zimachitika pamtunda kapena ming'alu yamkati.
2. Yankho; makamaka kuchokera ku zopangira, kuchuluka ndi njira zothetsera.
2.1 Kusankha ndi kukonza zinthu zopangira
1) utomoni ndi masanjidwewo a bmc, unsaturated polyester utomoni, vinilu ester,phenolic utomoni, melamine, ndi zina zotero. Utomoni ndi mankhwala ochiritsira, ndi mphamvu yaikulu. Choncho, ntchito smc/bmc utomoni wapadera, ndi m-phenylene mtundu utomoni, m-phenylene utomoni kuposa o-phenylene mtundu wa kukhuthala kwakukulu, kotero kuwonjezera pa utomoni wokha shrinkage ndi yaing'ono, akhoza kuvomereza kwambiri crosslinking monomers, kotero kuti kachulukidwe wa kachulukidwe ukuwonjezeka, kuchepa mlingo.
(2) onjezani wophatikizika wocheperako wocheperako; unsaturated polyester utomoni kuchiritsa contraction mlingo wa mpaka 5 ~ 8%, kuwonjezera zosiyanasiyana filler shrinkage akadali oposa 3%, mankhwala ambiri shrinkage mlingo woposa 0.4% kusweka, kotero onjezani utomoni thermoplastic, ntchito thermoplastic utomoni kuthetsa matenthedwe kukula kwa mbali machiritso. pmma, ps add ndi monomer styrene kusakaniza ndi kusungunuka kwabwinoko, kuwonjezera kwa pmma Kutsiriza kuli bwino. Kuchepa kwazinthu kumatha kuwongoleredwa pa 0.1 ~ 0.3%.
(3) filler, retardant flame, glass fiber; galasi CHIKWANGWANI kutalika - zambiri 6 ~ 12mm, nthawi zina kukumana mkulu makina katundu 25mm; kuti akwaniritse zofunikira za kuumba fluidity, mpaka 3mm. galasi CHIKWANGWANI zili zambiri 15% ~ 20%; kwa zinthu zogwira ntchito kwambiri, mpaka 25%. Zomwe zili mugalasi la BMC ndizotsika kuposa SMC, mutha kuwonjezera zodzaza, ndiye kuti mtengo wake ndi wotsika kuti mupange zodzaza ndi inorganic. M'munsi kuti apange organic filler, lawi retardant, galasi CHIKWANGWANI ndi utomoni ndi mankhwala osakaniza pakati ntchito ambiri silane lumikiza wothandizira mankhwala pamaso kusakaniza, ambiri ntchito KH-560, KH-570 zotsatira ndi zabwino kujowina zolimba ndi zabwino, zipangizo micronized, monga heavy calcium carbonate ndi micronized kalasi, particle0 to mesh 12 quilent 1 ~ 51
2.2 BMC kufanana zofunika BMC m'munsi utomoni, kuchuluka sangakhale zosakwana 20%, kuchuluka kwa initiator zokhudzana ndi kuchuluka kwa crosslinking wothandizira kwenikweni alibe Kuwonjezera kuwonjezera kuchuluka kwa wothandizila crosslinking mu utomoni zili utomoni mlandu 35%, kuwonjezera pa kuchuluka kwa otsika shrinkage wothandizira kuti agwirizane nazo zimadalira kuchuluka kwa utomoni. Kugwiritsiridwa ntchito kwa mkulu-kutentha kuchiritsa wothandizira TBPB, filler ndi flame retardant (aluminium hydroxide) kuti agwirizane ndi kuchuluka kwa pafupifupi 50% ndikoyenera kwambiri, ndikowirikiza kawiri kuposa utomoni, wochuluka kwambiri kuti agwirizane ndi mphamvu ya kapangidwe kameneka kawonongeka, kosavuta kusokoneza!
2.3 Mikhalidwe yopangira zinthu
(1) kusakaniza, choyamba, pamene kusakaniza zinthu kusakaniza wogawana, ufa choyamba kuwonjezera yaing'ono yeniyeni mphamvu yokoka, ndiyeno kuwonjezera lalikulu enieni yokoka, madzi osakaniza poyamba ndiyeno anawonjezera, woyambitsa ndi womaliza kuwonjezeredwa, thickener ayenera kuwonjezeredwa pamaso pa phala utomoni ndi polystyrene kneading. Ulusi wagalasi umawonjezeredwa mumagulu
(2) akamaumba zinthu ndondomeko: akamaumba magawo ndondomeko mwachindunji zimakhudza mankhwala zabwino kapena zoipa. Kawirikawiri ndi kuwonjezeka kwa akamaumba kuthamanga, shrinkage amachepetsa. Kutentha kwa nkhungu ndikokwera kwambiri kudzapanga mzere wosakanikirana, zinthuzo sizikhala zofanana, kupsinjika kwamkati kumakhala kosiyana, kosavuta kusweka. Kugwira kukakamiza kuti muwonjezere nthawi yoyenera kumathandizira kupewa kusweka kwa ziwalozo.
(3) preheating kutchinjiriza dongosolo: otsika kutentha mbali n'zosavuta kusweka. Choncho, zinthuzo ziyenera kutenthedwa
Nthawi yotumiza: Jun-10-2025
