BMC chidimbu cheBulk Molding CompoundmuChirungu, zita rechiChinese rinonzi Bulk Molding Compound (inonziwo: unsaturated polyester glass fiber yakasimbiswa Bulk Molding Compound) neresin yemvura, yakaderera shrinkage agent, crosslinking agent, initiator, filler, short-cut-cut glass fiber flakes uye zvimwe zvikamu zvemusanganiswa wemuviri weiyo yakaoma, mutembiricha uye kumanikidzwa mamiriro, iyo crosslinking ye polymer unsaturated uye kuita styrene. Pasi petembiricha uye kumanikidzwa, iyo unsaturated polyester uye styrene zvakachinjika-yakabatana uye inorapwa nepolymerization reaction. Hunhu hwayo hwakanaka hwemagetsi uye hunhu hwakanakisa hwemagetsi, uye kupisa kwekudzivirira uye zvakanaka kugadzirisa zvivakwa zvinoshandiswa zvakanyanya mumidziyo yemagetsi, zviridzwa, kugadzira mota, ndege, zvekufambisa, maindasitiri ekuvaka.
Formulation system
1. Unsaturated polyester resin: ine smc/bmc special resin, kunyanya m-phenyl kumusoro, impact resistance, corrosion resistance, arc resistance, yakakodzera kugadzirwa kweblock kana anisotropic products.
2. Crosslinking agent; ine monomer styrene, huwandu hwe30% ~ 40%, zvichienderana nezviri mukati memabhondi maviri mu polyester isina unsaturated uye chikamu che trans double bond uye cis double bond, chikamu chepamusoro che crosslinking monomers, inogona kuwana kurapa kwakazara.
3. The initiator ine high tembiricha inorapa agent, tert-butyl peroxybenzoate (TBPB) ndeyeinowanzo shandiswa kupisa tembiricha inoporesa, tembiricha yekuparara kwemvura ye104 madhigirii ekuumba tembiricha ye135 kusvika 160 madhigirii.
4. Yakaderera shrinkage agent inowanzoshandiswa thermoplastic resins, kushandiswa kwekuwedzera kwekupisa kugadzirisa kuumbwa kwekuumbwa. Kazhinji, shrinkage rate yezvigadzirwa zvinofanirwa kudzorwa pa 0.1 ~ 0.3%, saka dosage inofanira kunyatsodzorwa.
5. Kusimbisa zvinhu: inowanzoshandiswa coupling yakagadziriswa 6 ~ 12mm yakareba mafupi fibers 6 flame retardant inoshandisa Al2O3.3H2O-based, kuwedzera zvishoma zvishoma zve phosphorus-ine flame retardant, hydrated alumina inoitawo basa rekuzadza 7. Fillers inogona kuderedza mari yekuvandudza magetsi emagetsi uye retardancy retardancy. Calcium carbonate ndiyo yakarebesa yakashandiswa yekuzadza ine yakanaka kuita kwese, kazhinji iri muchimiro chekunaka, micropowder mushure mekubatanidza kurapwa uye yozowedzerwa.
BMC maitiro
1. Ngwarira kutevedzana kwekuwedzera zvinhu. Yakasanganiswa mune z-mhando yekukanya muchina, yekukanya muchina ine yekudziya mudziyo, ingave musanganiswa uri yunifomu inogona kucherechedzwa pendi yeruvara kana kabhoni coloring yakafanana yakakodzera, anenge 15 ~ 18 maminetsi.
2. Short-cut-glass fiber yekubatanidza yekupedzisira, kutanga kujoinha nhamba huru yefiber dzakaputsika, zvinokanganisa simba re
3. BMC zvinhu zvinofanirwa kuchengetwa patembiricha yakaderera, kazhinji pa10 madhigirii celsius, tembiricha yakakwira, iyo unsaturated resin iri nyore kuyambuka-kubatanidza uye kurapa, uyezve kugadzirisa kuumba kuoma.
4. Molding tembiricha: 140 madhigirii kana zvakadaro, yokumusoro uye yakaderera mold tembiricha 5 ~ 10 madhigirii, kuumba kumanikidza 7mpa kana zvakadaro, akabata nguva 40 ~ 80s/mm
Industrial diagnosis
1. Kuputika kwechigadzirwa: dambudziko rekuputika kwechigadzirwa rinowanzoitika, kunyanya munguva yechando yakaderera tembiricha mamiriro. Iyo inonzi cracking inoreva zvigadzirwa nekushushikana kwemukati, kukanganisa kwekunze kana mamiriro ezvakatipoteredza uye zvimwe zvinokanganisa pamusoro kana kuputika kwemukati.
2. Solution; kunyanya kubva kune zvigadzirwa, chiyero uye maitiro ekugadzirisa.
2.1 Kusarudzwa uye kugadziridzwa kwezvinhu zvakagadzirwa
1) Resin ndiyo matrix ye bmc, unsaturated polyester resin, vinyl ester,phenolic resin, melamine, etc. Resin ndiyo inorapa, ine simba guru. Nokudaro, kushandiswa kwe smc/bmc special resin, is a m-phenylene type resin, m-phenylene resin pane o-phenylene type ye high viscosity, saka mukuwedzera kune resin pachayo shrinkage idiki, inogona kubvuma mamwe crosslinking monomers, kuitira kuti density ye density iwedzere, shrinkage rate inoderera.
(2) wedzera composite yakaderera shrinkage agent; unsaturated polyester resin inorapa contraction rate inosvika 5 ~ 8%, wedzera akasiyana ekuzadza shrinkage ichiri kupfuura 3%, zvigadzirwa zvinowanzo shrinkage rate inodarika 0.4% kuparuka, saka wedzera thermoplastic resins, kushandiswa kwe thermoplastic resins kubvisa kupisa kwekuwedzera kwezvikamu zvekupora. pmma, ps wedzera uye monomer styrene kusanganisa uye kupera kwezviri nani, kuwedzera kwepmma Kupedzisa kuri nani. Chigadzirwa shrinkage chinogona kudzorwa pa 0.1 ~ 0.3%.
(3) filler, flame retardant, glass fiber; girazi faibha kureba - kazhinji 6 ~ 12mm, dzimwe nguva kusangana neakakwira michina zvivakwa kusvika 25mm; kuitira kuti isangane nezvinodiwa zvekuumba fluidity, kusvika 3mm. girazi fiber content inowanzo 15% ~ 20%; yezvigadzirwa zvepamusoro-soro, kusvika pa25%. BMC girazi faibha yemukati yakaderera pane iyo SMC, unogona kuwedzera imwe yekuzadza, saka mutengo wakadzikira kuitira kugadzira inorganic filler. Kudzika kuitira kugadzira iyo inorganic filler, flame retardant, girazi faibha uye resin ine musanganiswa wemakemikari pakati pekushandiswa kwakawanda kwe silane coupling agent kurapwa isati yasanganiswa, inowanzoshandiswa KH-560, KH-570 mhedzisiro yakanaka kujoina solids yakanaka, micronized zvinhu, senge inorema calcium carbonate ine micronized giredhi, particle0 kusvika 12 quilent 1 ~ 12
2.2 BMC kuenzanisa zvinodiwa Bmc base resin, iyo mari haigone kuve isingasviki makumi maviri muzana, huwandu hwayo hwekutanga hune hukama nehuwandu hweiyo crosslinking agent haifanirwe kuwedzera huwandu hweiyo crosslinking agent mune resin yemukati inoverengerwa 35%, mukuwedzera kune yakaderera shrinkage agent yekubatanidza zvakare zvinoenderana nehuwandu hweresin. Iko kushandiswa kwepamusoro-tembiricha yekurapa agent TBPB, filler uye flame retardant (aluminium hydroxide) kuti ubatanidze huwandu hwese hunenge 50% yakanyanya kufanira, yakapetwa kaviri kupfuura resin, yakawandisa kujoinha simba rechimiro chakakuvadzwa, nyore kutsemuka!
2.3 Mamiriro ekugadzira maitiro
(1) kusanganisa, kutanga kwezvose, pakusanganisa zvinhu kuti zvisanganiswe zvakaenzana, hupfu hunotanga huchiwedzera hudiki hwakasimba, uye wobva wawedzera giravhiti yakakura, iyo mvura inosanganiswa kutanga uye yozowedzerwa, iyo yekutanga ndiyo yekupedzisira kuwedzerwa, iyo thickener inofanira kuwedzerwa pamberi pe resin paste uye polystyrene kneading. Girazi fiber inowedzerwa mumabhechi
(2) kuumba muitiro mamiriro: kuumba muitiro parameters anobata zvakananga chigadzirwa chakanaka kana chakaipa. Kazhinji nekuwedzera kwekuumbwa kwekumanikidza, shrinkage inoderera. Mold tembiricha yakakwira zvakanyanya ichaita mutsara wekusanganisa, zvinhu hazvina yunifomu, kushushikana kwemukati kwakasiyana, kuri nyore kupaza. Kubata kumanikidzwa kwekuwedzera kwakakodzera kwenguva kunobatsira kudzivirira kuputika kwezvikamu.
(3) preheating insulation system: yakaderera tembiricha zvikamu zviri nyore kutsemuka. Naizvozvo, zvinhu zvacho zvinofanirwa kunge zvichipiswa
Nguva yekutumira: Jun-10-2025
