BMC taƙaice ce taƘwararren Ƙwararren Ƙwararren Ƙwararren Ƙwaƙwalwaa cikin Turanci, Sinanci sunan shi ne Bulk Molding Compound (kuma ake kira: unsaturated polyester gilashin fiber ƙarfafa Bulk Molding Compound) ta ruwa guduro, low shrinkage wakili, crosslinking wakili, initiator, filler, short-yanke gilashin fiber flakes da sauran aka gyara na jiki cakuda hadaddun, a cikin yanayin zafi da matsa lamba, da crosslinking na polyester unsatu. Ƙarƙashin zafin jiki da matsa lamba, polyester da styrene da ba su da tushe suna haɗe-haɗe kuma an warke su ta hanyar amsawar polymerization. Kyakkyawan kayan aikin injiniya da kyawawan kayan lantarki, da juriya na zafi da kyawawan kayan aiki ana amfani dasu sosai a cikin kayan lantarki, kayan aiki, masana'antar mota, jirgin sama, sufuri, masana'antar gini.
Tsarin tsari
1. Unsaturated polyester guduro: tare da smc / bmc musamman guduro, yafi m-phenyl up, tasiri juriya, lalata juriya, baka juriya, dace da samar da block ko anisotropic kayayyakin.
2. Wakilin Crosslinking; tare da monomer styrene, adadin up30% ~ 40%, dangane da abun ciki na biyu shaidu a cikin unsaturated polyester da rabo daga trans double bonds da cis biyu bonds, babban rabo daga crosslinking monomers, na iya samun mafi cikakken curing.
3. Mai ƙaddamarwa tare da wakili mai zafi mai zafi, tert-butyl peroxybenzoate (TBPB) yana cikin wakili na maganin zafin jiki da aka saba amfani da shi, yanayin bazuwar ruwa na 104 digiri gyare-gyaren zafin jiki na 135 zuwa 160 digiri.
4. Low shrinkage wakili fiye amfani da thermoplastic resins, da yin amfani da zafi fadada zuwa biya diyya up gyare-gyaren ƙanƙancewa. Gabaɗaya, ƙimar haɓakar samfuran yakamata a sarrafa su a 0.1 ~ 0.3%, don haka yakamata a sarrafa sashi sosai.
5. Abubuwan ƙarfafawa: gabaɗaya ana amfani da haɗin haɗakarwa da aka sarrafa 6 ~ 12mm dogon gajerun fibers 6 mai riƙe da harshen wuta ta amfani da tushen Al2O3.3H2O, ƙara ƙaramin adadin sabon ƙwayar wuta mai ɗauke da phosphorus, hydrated alumina kuma yana taka rawa na filler 7. Fillers na iya rage farashin inganta kayan lantarki da jinkirin wuta. Calcium carbonate shine mafi dadewar da aka yi amfani da shi tare da kyakkyawan aiki gabaɗaya, gabaɗaya a cikin nau'i mai kyau, micropowder bayan haɗin haɗin gwiwa sannan kuma ƙara.
BMC tsari
1. Kula da jerin abubuwan ƙara kayan aiki. Mixed a cikin nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in z, na'ura mai ɗorewa yana da na'urar dumama, ko haɗuwa daidai ne za a iya lura da manna launi ko launin carbon daidai, kimanin minti 15 ~ 18
2. Fiber gilashin gajere don shiga na ƙarshe, da wuri don shiga babban adadin fashe fibers, yana shafar ƙarfin
3. Dole ne a adana kayan BMC a ƙananan zafin jiki, gabaɗaya a 10 digiri Celsius, zafin jiki yana da girma, resin da ba shi da tushe yana da sauƙin hayewa da warkewa, sannan sarrafa matsalolin gyare-gyare.
4. Molding zafin jiki: 140 digiri ko haka, babba da ƙananan mold zafin jiki 5 ~ 10 digiri, gyare-gyaren matsa lamba 7mpa ko haka, rike lokaci 40 ~ 80s / mm
Binciken masana'antu
1. Samfurin fatattaka: matsalar fatalwar samfur na kowa, musamman a cikin yanayin yanayin sanyi mara kyau. Abin da ake kira fashewa yana nufin samfurori ta hanyar damuwa na ciki, tasiri na waje ko yanayin muhalli da sauran tasiri a kan saman ko tsagewar ciki.
2. Magani; musamman daga albarkatun kasa, rabo da tsari don warwarewa.
2.1 Zaɓi da sarrafa kayan albarkatun ƙasa
1) Guduro shine matrix na bmc, guduro polyester unsaturated, vinyl ester,phenolic guduro, melamine, da sauransu. Resin shine maganin samfur, tare da ƙarfin mahimmanci. Saboda haka, yin amfani da smc / bmc na musamman guduro, shi ne m-phenylene irin guduro, m-phenylene guduro fiye da o-phenylene irin high danko, don haka ban da guduro kanta shrinkage ne karami, zai iya yarda da karin crosslinking monomers, sabõda haka, da yawa daga cikin yawa girma, shrinkage rate rage.
(2) ƙara ƙaƙƙarfan wakili mara ƙanƙanci; unsaturated polyester guduro curing contraction kudi na har zuwa 5 ~ 8%, ƙara da dama filler shrinkage ne har yanzu fiye da 3%, kayayyakin kullum shrinkage kudi fiye da 0.4% zuwa crack, don haka ƙara thermoplastic resins, da amfani da thermoplastic resins don kawar da thermal fadada na curing contraction na sassa. pmma, ps add da monomer styrene hadawa da narkar da mafi kyau, ƙari na pmma Ƙarshen ya fi kyau. Ana iya sarrafa raguwar samfur a 0.1 ~ 0.3%.
(3) filler, harshen wuta retardant, gilashin fiber; gilashin fiber tsawon - gabaɗaya 6 ~ 12mm, wani lokacin don saduwa da manyan kayan aikin injiniya zuwa 25mm; don saduwa da buƙatun gyare-gyaren ruwa, zuwa 3mm. Gilashin fiber abun ciki shine yawanci 15% ~ 20%; don samfurori masu girma, zuwa 25%. Abun ciki na fiber gilashin BMC ƙasa da SMC, zaku iya ƙara ƙarin filler, don haka farashin ya yi ƙasa don yin filler na inorganic. Lower domin yin inorganic filler, harshen wuta retardant, gilashin fiber da guduro da sinadaran hade tsakanin general amfani da silane hada guda biyu wakili magani kafin hadawa, fiye da amfani KH-560, KH-570 sakamako ne mai kyau don shiga da daskararru ne lafiya, micronized kayan, kamar nauyi alli carbonate da micronized grade, barbashi size 12 ~ 10 qui (12 ~ 100)
2.2 BMC proportioning bukatun Bmc tushe guduro, adadin ba zai iya zama kasa da 20%, ta adadin initiator alaka da adadin crosslinking wakili m ba su da bugu da žari ƙara adadin crosslinking wakili a cikin guduro abun ciki lissafta ga 35%, ban da adadin low shrinkage wakili don shiga kuma ya dogara da adadin guduro. Yin amfani da wakili mai zafi mai zafi na TBPB, filler da mai ɗaukar wuta (aluminum hydroxide) don haɗawa da jimlar adadin kusan 50% ya fi dacewa, sau biyu kamar resin, da yawa don shiga ƙarfin tsarin ya lalace, mai sauƙin fashe!
2.3 Yanayin tsarin samarwa
(1) da farko idan ana hada kayan da za'a gauraya daidai gwargwado, sai a fara hada foda kadan kadan, sannan a kara da wani babban nauyi na musamman, sai a hada ruwan da farko sannan a kara da shi, sai a zuba mai farawa na karshe, sai a zuba kauri kafin a kwaba resin paste da polystyrene. Gilashin fiber yana ƙara a cikin batches
(2) yanayin aiwatar da gyare-gyare: sigogin aiwatar da gyare-gyare kai tsaye suna shafar samfur mai kyau ko mara kyau. Yawancin lokaci tare da karuwar matsa lamba, raguwa yana raguwa. Mold zafin jiki ya yi yawa zai samar da layi na fuskar fuska, kayan abu ba daidai ba ne, damuwa na ciki ya bambanta, mai sauƙi don fashewa. Riƙe matsin lamba don tsawaita lokacin da ya dace yana dacewa da rigakafin fashe sassa.
(3) preheating rufi tsarin: ƙananan zafin jiki sassa ne da sauki crack. Sabili da haka, kayan ya kamata a yi zafi sosai
Lokacin aikawa: Juni-10-2025
