BMC ndi chidule chaChopangira Chopanga ZambiriMu Chingerezi, dzina la Chitchaina ndi Bulk Molding Compound (yomwe imatchedwanso: unsaturated polyester glass fiber reinforced Bulk Molding Compound) ndi liquid resin, low shrinkage agent, crosslinking agent, initiator, filler, short-cut glass fiber flakes ndi zigawo zina za physical mixture ya complex, mu kutentha ndi kupanikizika, crosslinking ya unsaturated polyester ndi styrene, polymerization reaction imachitika. Pansi pa kutentha ndi kupanikizika, unsaturated polyester ndi styrene zimagwirizanitsidwa ndi crosslinking reaction. Makhalidwe ake abwino kwambiri a makina ndi mphamvu zamagetsi, komanso kukana kutentha ndi mphamvu zabwino zogwirira ntchito zimagwiritsidwa ntchito kwambiri mu zipangizo zamagetsi, zida, kupanga magalimoto, ndege, mayendedwe, ndi mafakitale omanga.
Dongosolo lopangira
1. Unsaturated polyester resin: yokhala ndi smc/bmc special resin, makamaka m-phenyl up, kukana kugunda, kukana dzimbiri, kukana arc, yoyenera kupanga zinthu zotchinga kapena anisotropic
2. Cholumikizira cholumikizira; ndi monomer styrene, kuchuluka kwa 30% mpaka 40%, kutengera zomwe zili mu polyester yosakhuta ndi kuchuluka kwa ma trans double bonds ndi cis double bonds, kuchuluka kwakukulu kwa ma crosslinking monomers, kumatha kuchiritsa kwathunthu.
3. Choyambitsa chomwe chili ndi mankhwala ochiritsa kutentha kwambiri, tert-butyl peroxybenzoate (TBB) ndi cha mankhwala ochiritsa kutentha kwambiri omwe amagwiritsidwa ntchito kwambiri, kutentha kwa madzi owonongeka kwa madigiri 104 oumba kutentha kwa madigiri 135 mpaka 160.
4. Mankhwala otsika a thermoplastic resins amagwiritsidwa ntchito kwambiri, ndipo kutentha kumawonjezeka kuti achepetse kupangika kwa zinthuzo. Kawirikawiri, kuchuluka kwa kufupika kwa zinthuzo kuyenera kulamulidwa pa 0.1 ~ 0.3%, kotero mlingo wake uyenera kulamulidwa mosamala.
5. Zipangizo zolimbikitsira: Cholumikizira chomwe chimagwiritsidwa ntchito nthawi zambiri chimakonzedwa ndi ulusi waufupi wa 6 ~ 12mm wautali 6 choletsa moto pogwiritsa ntchito Al2O3.3H2O, kuwonjezera pang'ono choletsa moto chatsopano chokhala ndi phosphorous, alumina wothira madzi amakhalanso ngati chodzaza 7. Zodzaza zimatha kuchepetsa mtengo wokonzanso mphamvu zamagetsi ndi kuletsa moto. Calcium carbonate ndiye chodzaza chomwe chimagwiritsidwa ntchito nthawi yayitali chomwe chimagwira ntchito bwino, nthawi zambiri chimakhala ngati ufa wosalala, wochepa pambuyo pochizira cholumikizira kenako ndikuwonjezedwa.
Njira ya BMC
1. Samalani ndi ndondomeko yowonjezerera zinthu. Mukasakaniza makina osakaniza a mtundu wa z, makina osakaniza ali ndi chipangizo chotenthetsera, kaya kusakaniza kuli kofanana, utoto wa utoto kapena kaboni umawoneka wofanana, pafupifupi mphindi 15 mpaka 18.
2. Ulusi wagalasi wodulidwa mwachidule kuti ulumikizane ndi womaliza, woyambirira kuti ulumikizane ndi ulusi wambiri wosweka, zomwe zimakhudza mphamvu ya
3. Zipangizo za BMC ziyenera kusungidwa kutentha kochepa, nthawi zambiri pa madigiri 10 Celsius, kutentha kumakhala kwakukulu, utomoni wosakhuta ndi wosavuta kuulumikiza ndi kuukonza, kenako kukonza zovuta zoumba.
4. Kutentha kwa kuumba: madigiri 140 kapena kuposerapo, kutentha kwa nkhungu chapamwamba ndi chapansi madigiri 5 ~ 10, kuthamanga kwa kuumba 7mpa kapena kuposerapo, nthawi yogwira 40 ~ 80s/mm
Matenda a mafakitale
1. Kusweka kwa zinthu: Vuto la kusweka kwa zinthu ndi lofala, makamaka m'nyengo yozizira. Chomwe chimatchedwa kusweka kwa zinthu chimatanthauza kupsinjika kwa mkati, kukhudzidwa kwakunja kapena zochitika zachilengedwe ndi zina zomwe zimachitika pamwamba kapena ming'alu yamkati.
2. Yankho; makamaka kuchokera ku zipangizo zopangira, kuchuluka kwake ndi njira yothetsera vutoli.
2.1 Kusankha ndi kukonza zinthu zopangira
1) Utomoni ndi matrix ya bmc, unsaturated polyester resin, vinyl ester,utomoni wa phenolic, melamine, ndi zina zotero. Resin ndiye mankhwala ochiritsira, okhala ndi mphamvu yofunikira. Chifukwa chake, kugwiritsa ntchito smc/bmc special resin, ndi resin ya m-phenylene, m-phenylene resin yokhala ndi kukhuthala kwakukulu kuposa mtundu wa o-phenylene, kotero kuwonjezera pa resin yokha, kuchepa kwake ndi kochepa, kumatha kulandira ma monomers ambiri olumikizana, kotero kuti kuchuluka kwa kuchuluka kumawonjezeka, kuchuluka kwa kuchepa kumachepa.
(2) onjezerani mankhwala ochepetsa kuchepa kwa chitsulo chopangidwa ndi polyester; unsaturated polyester resin curring contraction rate ya 5 ~ 8%, kuwonjezera mitundu yosiyanasiyana ya shrinkage yodzaza ndi yoposa 3%, zinthu zambiri shrinkage rate ya 0.4% kuti zisweke, kotero onjezerani thermoplastic resins, kugwiritsa ntchito thermoplastic resins kuti muchepetse kutentha kwa fracture contraction ya ziwalo. pmma, ps add ndi monomer styrene mixing ndi dissolution of the better, kuwonjezera kwa pmma Mapeto ake ndi abwino. shrinkage ya mankhwala ikhoza kulamulidwa pa 0.1 ~ 0.3%.
(3) chodzaza, choletsa moto, ulusi wagalasi; ulusi wagalasi kutalika - nthawi zambiri 6 ~ 12mm, nthawi zina kukwaniritsa mawonekedwe apamwamba amakina kufika 25mm; kuti akwaniritse zofunikira pakuumba madzimadzi, kufika 3mm. Kuchuluka kwa ulusi wagalasi nthawi zambiri kumakhala 15% ~ 20%; pazinthu zogwira ntchito bwino, kufika 25%. Kuchuluka kwa ulusi wagalasi wa BMC kumakhala kotsika kuposa SMC, mutha kuwonjezera chodzaza china, kotero mtengo wake ndi wotsika kuti mupange chodzaza chosapangidwa. Kutsika kuti mupange chodzaza chosapangidwa, choletsa moto, ulusi wagalasi ndi utomoni zimakhala ndi kuphatikiza kwa mankhwala pakati pa kugwiritsa ntchito mankhwala ambiri a silane coupling agent musanasakanizidwe, zomwe zimagwiritsidwa ntchito kwambiri KH-560, KH-570 zotsatira zake ndizabwino kuphatikiza zolimba, zinthu zopangidwa ndi micronized, monga calcium carbonate yolemera yokhala ndi micronized grade, kukula kwa tinthu 1 ~ 10um (yofanana ndi ma mesh 1250)
2.2 Zofunikira pakuwerengera BMC. Bmc base resin, kuchuluka kwake sikungakhale kochepera 20%, kuchuluka kwake koyambitsa komwe kumakhudzana ndi kuchuluka kwa wothandizira wolumikizirana sikufunikanso kuwonjezera kuchuluka kwa wothandizira wolumikizirana mu utomoni womwe uli ndi 35%, kuwonjezera pa kuchuluka kwa wothandizira wotsika kuti alumikizane kumadaliranso kuchuluka kwa utomoni. Kugwiritsa ntchito mankhwala ochiritsa kutentha kwambiri TBPB, filler ndi lawi retardant (aluminium hydroxide) kuti alumikizane ndi kuchuluka konse kwa pafupifupi 50% ndikoyenera kwambiri, ndikowirikiza kawiri kuposa utomoni, mphamvu ya kapangidwe kake yawonongeka, kosavuta kusweka!
2.3 Mikhalidwe ya njira yopangira
(1) kusakaniza, choyamba, mukasakaniza zinthu kuti zisakanizidwe mofanana, ufawo choyamba umawonjezera mphamvu yaing'ono, kenako umawonjezera mphamvu yaikulu, madziwo amasakanizidwa kaye kenako amawonjezeredwa, choyambitsa chimakhala chomaliza kuwonjezeredwa, chokhuthala chiyenera kuwonjezeredwa musanagwiritse ntchito utomoni ndi polystyrene. Ulusi wagalasi umawonjezeredwa m'magulu.
(2) mikhalidwe ya njira yopangira umba: magawo a njira yopangira umba amakhudza mwachindunji chinthucho kukhala chabwino kapena choipa. Nthawi zambiri kuthamanga kwa umba kumawonjezeka, kuchepa kwake kumachepa. Kutentha kwa umba kumakhala kwakukulu kwambiri kumapanga mzere wosakanikirana pamwamba, zinthuzo sizili zofanana, kupsinjika kwamkati kumakhala kosiyana, kosavuta kusweka. Kugwira kupanikizika kwa nthawi yokwanira kumathandiza kupewa kusweka kwa ziwalozo.
(3) makina otenthetsera kutentha: zigawo zotentha kwambiri n'zosavuta kuswa. Chifukwa chake, zinthuzo ziyenera kutenthedwa
Nthawi yotumizira: Juni-10-2025
