BMC yog lub npe luv ntawmBulk Moulding CompoundNyob rau hauv lus Askiv, Suav lub npe yog Bulk Molding Compound (tseem hu ua: unsaturated polyester iav fiber reinforced Bulk Molding Compound) los ntawm cov kua resin, tsawg shrinkage tus neeg saib xyuas, crosslinking tus neeg sawv cev, pib, muab tub lim, luv-txiav iav fiber ntau flakes thiab lwm yam khoom ntawm lub cev sib tov ntawm complex, nyob rau hauv lub kub thiab siab tej yam kev mob, crosslinking ntawm unsaturated polyester thiab styrene. Nyob rau hauv qhov kub thiab txias, lub unsaturated polyester thiab styrene yog cross-linked thiab kho los ntawm polymerization cov tshuaj tiv thaiv. Nws cov khoom siv zoo heev thiab cov khoom siv hluav taws xob zoo heev, thiab cov khoom siv hluav taws xob zoo, thiab cov khoom siv hluav taws xob zoo, thiab cov khoom siv hluav taws xob tau siv dav hauv cov khoom siv hluav taws xob, kev ntsuas, kev tsim tsheb, aviation, tsheb thauj mus los, kev tsim kho kev lag luam.
Formulation system
1. Unsaturated polyester resin: nrog smc / bmc tshwj xeeb cob, feem ntau m-phenyl nce, cuam tshuam tsis kam, corrosion kuj, arc kuj, haum rau zus tau tej cov block los yog anisotropic khoom.
2. Tus neeg saib xyuas kev sib txuas; nrog monomer styrene, tus nqi ntawm nce 30% ~ 40%, nyob ntawm cov ntsiab lus ntawm ob daim ntawv cog lus hauv cov polyester tsis muaj qhov sib xyaw thiab qhov kev faib ua feem ntawm trans ob daim ntawv cog lus thiab cis ob daim ntawv cog lus, siab feem ntau ntawm crosslinking monomers, tuaj yeem tau txais kev kho kom tiav.
3. Tus neeg pib nrog kub kub curing tus neeg saib xyuas, tert-butyl peroxybenzoate (TBPB) belongs rau cov feem ntau siv kub curing agent, kua decomposition kub ntawm 104 degrees molding kub ntawm 135 mus rau 160 degrees.
4. Tsawg shrinkage tus neeg saib xyuas feem ntau siv cov thermoplastic resins, kev siv cov cua kub nthuav tawm los ua kom cov molding contraction. Feem ntau, qhov shrinkage tus nqi ntawm cov khoom yuav tsum tau tswj ntawm 0.1 ~ 0.3%, yog li cov tshuaj yuav tsum nruj me ntsis tswj.
5. Cov ntaub ntawv txhawb zog: feem ntau siv coupling txheej txheem 6 ~ 12mm ntev luv fibers 6 nplaim retardant siv Al2O3.3H2O-raws li, ntxiv me me ntawm phosphorus-muaj nplaim retardant, hydrated alumina kuj plays lub luag hauj lwm ntawm muab tub lim 7. Fillers tuaj yeem txo tus nqi ntawm kev txhim kho cov hluav taws xob hluav taws xob thiab hluav taws xob. Calcium carbonate yog cov khoom siv ntev tshaj plaws nrog kev ua tau zoo tag nrho, feem ntau nyob rau hauv daim ntawv ntawm kev nplua, micropowder tom qab coupling kev kho mob thiab tom qab ntawd ntxiv.
BMC txheej txheem
1. Ua tib zoo saib ua ntu zus ntawm cov khoom siv ntxiv. Mixed nyob rau hauv z-hom kneading tshuab, kneading tshuab muaj ib tug cua sov ntaus ntawv, seb qhov sib tov yog uniformly soj ntsuam cov xim muab tshuaj txhuam los yog carbon coloring uniformly tsim nyog, txog 15 ~ 18 feeb
2. luv-txiav iav fiber ntau los koom nrog qhov kawg, thaum ntxov los koom nrog ntau cov fibers tawg, cuam tshuam rau lub zog ntawm cov
3. Cov khoom siv BMC yuav tsum tau muab khaws cia ntawm qhov kub thiab txias, feem ntau ntawm 10 degrees Celsius, qhov kub thiab txias, cov khoom siv tsis zoo yog qhov yooj yim rau kev sib txuas thiab kho, thiab tom qab ntawd ua cov txheej txheem molding nyuaj.
4. molding kub: 140 degrees los yog li ntawd, lub sab sauv thiab qis pwm kub 5 ~ 10 degrees, molding siab 7mpa los yog li ntawd, tuav lub sij hawm 40 ~ 80s / hli
Muaj kev kuaj mob
1. Cov khoom tawg: cov khoom tawg yog qhov teeb meem tshwm sim, tshwj xeeb tshaj yog nyob rau lub caij ntuj no tsis kub kub. Lub npe tawg yog hais txog cov khoom los ntawm kev ntxhov siab sab hauv, kev cuam tshuam sab nraud lossis ib puag ncig thiab lwm yam cuam tshuam rau saum npoo los yog sab hauv tawg.
2. Kev daws teeb meem; tshwj xeeb los ntawm cov khoom siv raw, kev faib ua feem thiab txheej txheem los daws.
2.1 Kev xaiv thiab ua cov khoom siv raw
1) Resin yog matrix ntawm bmc, unsaturated polyester cob, yas ester,phenolic cob, melamine, thiab lwm yam Resin yog cov khoom kho, nrog rau lub zog tseem ceeb. Yog li ntawd, kev siv smc / bmc tshwj xeeb cob, yog m-phenylene hom resin, m-phenylene resin dua li o-phenylene hom siab viscosity, yog li ntxiv rau cov resin nws tus kheej shrinkage me me, tuaj yeem txais ntau crosslinking monomers, kom qhov ceev ntawm qhov ceev nce, shrinkage tus nqi txo.
(2) ntxiv cov khoom sib xyaw uas tsis tshua muaj shrinkage; unsaturated polyester resin curing contraction tus nqi txog li 5 ~ 8%, ntxiv ntau yam ntawm cov ntaub ntawv shrinkage tseem yog ntau tshaj 3%, cov khoom feem ntau shrinkage tus nqi ntawm ntau tshaj 0.4% rau tawg, yog li ntxiv thermoplastic resins, siv cov thermoplastic resins kom tshem tawm thermal expansion ntawm curing contraction ntawm qhov chaw. pmma, ps ntxiv thiab monomer styrene mixing thiab dissolution ntawm qhov zoo dua, qhov sib ntxiv ntawm pmma Qhov tiav yog zoo dua. Cov khoom shrinkage tuaj yeem tswj tau ntawm 0.1 ~ 0.3%.
(3) muab tub lim, nplaim retardant, iav fiber ntau; iav fiber ntau ntev - feem ntau 6 ~ 12mm, qee zaum kom tau raws li cov khoom siv tshuab siab rau 25mm; txhawm rau ua kom tau raws li qhov yuav tsum tau ua ntawm molding fluidity, mus rau 3mm. iav fiber ntau cov ntsiab lus feem ntau yog 15% ~ 20%; rau cov khoom ua tau zoo, mus txog 25%. BMC iav fiber ntau cov ntsiab lus qis dua SMC, koj tuaj yeem ntxiv cov muab tub lim ntau dua, yog li tus nqi qis dua thiaj li ua rau inorganic muab tub lim. Tsawg dua txhawm rau ua kom cov khoom siv tsis zoo, nplaim hluav taws xob, iav fiber ntau thiab cov resin muaj cov tshuaj sib xyaw ua ke ntawm kev siv silane coupling tus neeg saib xyuas kev kho ua ntej sib tov, feem ntau siv KH-560, KH-570 nyhuv yog qhov zoo rau kev koom nrog cov khib nyiab zoo, cov khoom siv micronized, xws li hnyav calcium carbonate nrog qib micronized, particle loj 10-2 ~ 2.
2.2 BMC proportioning yuav tsum Bmc puag resin, tus nqi yuav tsum tsis pub tsawg tshaj li 20%, nws cov nyiaj tau los ntawm tus neeg sawv cev cuam tshuam rau tus nqi ntawm crosslinking tus neeg saib xyuas yeej tsis tas yuav ntxiv tus nqi ntawm crosslinking tus neeg saib xyuas nyob rau hauv cov ntsiab lus resin accounted rau 35%, ntxiv rau tus nqi qis shrinkage tus neeg saib xyuas los koom kuj nyob ntawm tus nqi ntawm resin. Kev siv cov tshuaj tua kab mob kub hnyiab TBPB, muab tub lim thiab nplaim hluav taws (aluminium hydroxide) los koom nrog tag nrho cov nqi ntawm 50% yog qhov tsim nyog, yog ob zaug ntau npaum li cov resin, ntau dhau los koom nrog lub zog ntawm cov qauv puas, yooj yim tawg!
2.3 Cov txheej txheem ntau lawm
(1) sib tov, ua ntej ntawm tag nrho cov, thaum sib tov cov khoom kom sib tov sib xyaw, cov hmoov ua ntej ntxiv ib qho me me ntawm lub ntiajteb txawj nqus, thiab tom qab ntawd ntxiv ib lub ntiajteb txawj nqus loj, cov kua yog tov ua ntej thiab tom qab ntawd ntxiv, qhov pib yog qhov kawg yuav tsum tau ntxiv, cov thickener yuav tsum tau ntxiv ua ntej cov resin paste thiab polystyrene kneading. Cov iav fiber ntau ntxiv rau hauv cov khoom siv
(2) molding txheej txheem tej yam kev mob: molding txheej txheem tsis ncaj qha cuam tshuam cov khoom zoo los yog phem. Feem ntau nrog kev nce ntawm molding siab, shrinkage txo. Pwm kub yog siab dhau lawm yuav ua rau saum npoo fusion kab, cov khoom siv tsis sib xws, qhov kev ntxhov siab sab hauv txawv, yooj yim rau tawg. Tuav siab rau qhov tsim nyog ncua sij hawm yog qhov tsim nyog rau kev tiv thaiv kev tawg ntawm qhov chaw.
(3) preheating rwb thaiv tsev: qhov kub tsis tshua muaj qhov yooj yim tawg. Yog li ntawd, cov khoom yuav tsum tau preheated
Post lub sij hawm: Jun-10-2025
