BMC Cov Khoom Siv thiab Pwm Daim Ntawv Thov
May 21, 2026
BMC (Bulk Moulding Compound) BMC (Bulk Moulding Compound)yog ib qho thermosetting composite cov khoom siv feem ntau yog tsim los ntawm tws iav fibers thiab unsaturated polyester resin, ua ke nrog inorganic fillers xws li calcium carbonate thiab ntau yam additives, kom huv si sib tov los ua ib homogeneous compound. Ua ntej tshaj tawm xyoo 1960 hauv West Lub Tebchaws Yelemees thiab UK, BMC maj mam tau txais kev pom zoo thoob plaws Tebchaws Europe, North America, thiab Nyij Pooj, thiab txij li ntawd los tau dhau los ua cov khoom tseem ceeb hauv kev tsim khoom siab -. Nws qhov tshwj xeeb muaj pes tsawg leeg muab kev ua tau zoo tag nrho thiab txhais cov qauv kev thov tshwj xeeb hauv kev tsim pwm. Hauv qab no yog ib qho kev ntsuam xyuas ntawm BMC cov yam ntxwv tseem ceeb thiab cov kev xav tseem ceeb rau kev siv pwm.
I. Cov yam ntxwv tseem ceeb ntawm cov khoom siv BMC
Qhov kev ua tau zoo tshaj ntawm BMC yog los ntawm nws cov qauv sib xyaw- kev sib koom ua ke los ntawm cov iav fiber ntau thiab kev sib koom ua ke muaj zog los ntawm cov resin matrix, ntxiv txhim kho los ntawm kev tswj xyuas meej los ntawm cov khoom ntim thiab cov khoom ntxiv. Qhov no ua rau tshwj xeeb txhua yam, thermal, hluav taws xob, thiab kev ua haujlwm, uas tuaj yeem faib raws li hauv qab no:
1. Zoo heev Mechanical thiab Dimensional Stability
BMC nthuav tawm cov khoom siv kho tshuab zoo dua li cov khoom siv engineering feem ntau, nrog lub zog tensile xws li 100 txog 200 MPa thiab flexural zog ntawm 200 txog 400 MPa. Nws kuj qhia tau zoo heev creep kuj, nrog deformation tus nqi nyob rau hauv ntev -lub sij hawm load seem hauv qab no 0.05% [5]. Nws qhov kev ruaj ntseg qhov ntev yog qhov tshwj xeeb tshaj yog, uas muaj qhov qis qis (0-0.5%), uas tuaj yeem hloov kho ntxiv ntawm cov khoom ntxiv. Cov coefficient ntawm linear thermal expansion ranges ntawm (1.3–3.5) × 10⁻⁵ K⁻¹, zoo sib xws ntawm cov hlau, thaum cov av noo hloov pauv yog thawj qhov ua rau qhov sib txawv ntawm qhov sib txawv- ua rau nws zoo tagnrho rau kev koom ua ke nrog cov khoom hlau [4][5]. Tsis tas li ntawd, BMC cov khoom lag luam muaj lub ntsej muag glossy, hnov ntxhiab thiab ntau heev rau qhov kov, thiab muaj qhov ntom ntom ntawm 1.3 thiab 2.1 g / cm³, sib txuas ua kom zoo nkauj nrog kev ua haujlwm zoo.
2. Qhov zoo tshaj plaws tshav kub tiv taus thiab nplaim taws retardancy
BMC muaj cov cua sov ua haujlwm zoo, nrog rau qhov kub ntawm qhov kub ntawm 200-280℃thiab qhov kev pabcuam ruaj khov nyob ib puag ncig 130 degree, ua kom muaj kev ntseeg tau zoo hauv kev xav tau ib puag ncig xws li cov tsheb cav hauv tsheb thiab siab - cov khoom siv hauv tsev kub. Nws cov nplaim hluav taws kub hnyiab tau raws li UL94 V-0 tus qauv, nrog arc tsis kam tshaj 190 vib nas this, ua tau raws li kev nyab xeeb ntawm hluav taws thiab rwb thaiv tsev qhov yuav tsum tau ua rau siab - cov khoom siv hluav taws xob hluav taws xob thiab tiv thaiv kev phom sij los ntawm kub lossis hluav taws xob arcing. Ntxiv mus, BMC qhia tau hais tias zoo heev tiv thaiv kom kub-kub aging, khaws ntau tshaj 60% ntawm nws thawj lub zog tom qab 10 xyoo ntawm sab nraum zoov raug.
3. Superior Hluav taws xob rwb thaiv tsev thiab tshuaj tiv thaiv
BMC muab tshwj xeeb hluav taws xob rwb thaiv tsev, nrog lub ntim resistivity ntau dua 10¹² Ω·cm. Nws cov rwb thaiv tsev ruaj khov txhim kho txog li 30% hauv cov av noo, thiab nws muaj qhov ua haujlwm siab arc tsis kam thiab tawg qhov hluav taws xob ntau tshaj 15 kV / mm, ua rau nws zoo tagnrho rau siab -voltage hluav taws xob Cheebtsam. Hais txog cov tshuaj tiv thaiv, BMC ua tau zoo tiv thaiv cov roj thiab dej tab sis muaj kev cuam tshuam rau ketones thiab muaj zog acids / bases, xav tau kev tiv thaiv tsim hauv kev siv tswv yim. Tsis tas li ntawd, BMC ua kom pom qhov zoo stain tsis kam thiab yooj yim ntawm kev tu, ua rau nws tsim nyog rau kev siv hauv chav dej, khoom siv hauv tsev, thiab lwm qhov chaw uas qhov chaw huv yog qhov tseem ceeb.
4. Muaj zog txheej txheem Compatibility thiab Environmental Sustainability
BMC yog sib xws nrog ntau yam molding txheej txheem xws li compression molding, hloov molding, thiab txhaj tshuaj molding, muab lub sij hawm luv luv thiab tsim nyog rau ntau lawm. Nws tso cai rau kev sib koom ua ke ntawm cov khoom ntim ntau los txo cov nqi thaum tseem ua tau raws li cov kev xav tau tshwj xeeb xws li nplaim hluav taws kub. Thaum lub sij hawm ua, BMC emits tsawg theem ntawm volatile organic tebchaw (VOCs), ua rau nws ntau environmentally friendly piv rau cov tsoos casting txoj kev. Nws tuaj yeem suav nrog txog 30% cov khoom siv rov ua dua tshiab, txo cov pa roj carbon hneev taw los ntawm 40% piv rau cov khoom siv niaj hnub, ua raws li cov qauv tsim ntsuab. Tsis tas li ntawd, BMC nthuav tawm cov yam ntxwv zoo heev, ua kom cov kab noj hniav muaj tseeb thiab ua rau nws zoo tagnrho rau kev tsim cov complex, siab -dimensional- precision qhov chaw.
II. Pwm Daim Ntawv Thov ntawm BMC Khoom
Muab cov yam ntxwv no, BMC tau siv dav hauv kev lag luam xws li hluav taws xob, tsheb, kev tsim kho, thiab cov khoom siv hauv tsev-cov haujlwm uas xav tau cov khoom lag luam siab thiab qhov raug. Pwm tsim, molding txheej txheem, thiab kev saib xyuas yuav tsum tau ua kom zoo raws li BMC cov khoom siv los xyuas kom meej cov khoom zoo. (1) Cov Khoom Siv Tseem Ceeb thiab cov khoom siv
1. Cov khoom siv hluav taws xob thiab hluav taws xob
Qhov no yog qhov tseem ceeb daim ntawv thov rau BMC cov ntaub ntawv, leveraging lawv zoo heev hluav taws xob rwb thaiv tsev, nplaim retardancy, thiab seem stability. Lawv tau dav siv nyob rau hauv kev tsim high-voltage insulators, meter boxes, circuit breaker housings, terminal blocks, transformer enclosures, and cable distribution boxes. Cov khoom lag luam no xav tau kev ua haujlwm siab heev thiab ua kom zoo los ntawm cov pwm kom ntseeg tau tias muaj qhov tsis xws luag -cov khoom dawb- tsis muaj qhov khoob thiab cov cim dab dej - uas tsis cuam tshuam kev ua haujlwm ntawm rwb thaiv tsev. Cov pwm pwm siv compression lossis hloov cov txheej txheem molding, nrog cov kab noj hniav uas yuav tsum tau ua kom zoo.
2. Automotive Manufacturing
Hauv kev lag luam tsheb, BMC cov ntaub ntawv feem ntau yog siv rau hauv lub teeb yuag thiab siab - kub- tiv thaiv cov khoom xws li lub cav thermal shields, qhov rooj module brackets, headlight vaj tse thiab reflectors, hais lus enclosures, roj teeb pob casings, thiab lub cav kawg npog. Rau lub teeb pom kev zoo, qhov xoom-shrinkage yam ntxwv ntawm BMC cov ntaub ntawv, ua ke nrog siab -precision pwm tsim, ua kom muaj kev sib raug zoo nrog cov txheej txheem tom qab nqus aluminium plating. Cov roj teeb pob casings xav tau pwm nrog cov qauv kev sib khi ruaj khov kom ua tau raws li IP67 cov qauv kev tiv thaiv.
3. Kev siv tsev thiab chav dej
Hauv kev tsim kho, BMC cov ntaub ntawv yog siv rau sab nrauv phab ntsa cladding, qhov rais thav duab, thiab cov kav dej hauv cov khoom siv. Ua tsaug rau lawv cov UV tsis kam, cuam tshuam lub zog, thiab qhov ruaj khov, lawv tuaj yeem tiv taus qhov hnyav sab nraum zoov ntev ntev. Hauv kev siv chav dej, lawv cov stain tsis kam, yooj yim ntawm kev tu, thiab siab gloss ua rau lawv zoo tagnrho rau fabricating huv fixtures xws li dag pob zeb washbasins. Pwm tsim yuav tsum hais txog kab noj hniav smoothness thiab optimize lub venting system kom tsis txhob nto bulges thiab voids.
4. Cov cuab yeej siv hauv tsev thiab cov teb tuaj tshiab
Hauv cov khoom siv hauv tsev, cov ntaub ntawv BMC yog siv rau cov cua sov-cov khoom tiv taus xws li lub qhov rooj microwave, cov hlau tsis yog-scorch puag daim hlau, thiab stator vaj tse rau siab- zaus motors, muaj txiaj ntsig zoo nyob rau hauv qhov kub thiab txias. Hauv cov teb tshiab, cov ntawv thov tau nthuav dav rau 5G kav hlau txais xov radomes, photovoltaic inverter enclosures, thiab cov cuab yeej kho mob. Rau 5G kav hlau txais xov radomes, pwm yuav tsum xyuas kom meej ib feem deformation nyob rau hauv qab 0.1 hli nyob rau hauv kub variations ntawm -50℃mus rau 150 degree. Cov cuab yeej siv kho mob yuav tsum ua kom tau raws li qhov yuav tsum tau ua ntawm biocompatibility thiab tiv taus kev ua kom tsis muaj menyuam ntawm 134 degree.
(2) Cov ntsiab lus tseem ceeb hauv BMC Mould Design
1. Cavity Design
Muab BMC tus nqi qis qis, kab noj hniav qhov ntev yuav tsum tau tswj kom meej, nrog rau qhov tsim nyog shrinkage pub (feem ntau 0.1% -0.3%) los tiv thaiv qhov sib txawv ntawm qhov sib txawv. Cov kab noj hniav saum npoo yuav tsum tau polished rau qhov roughness ntawm Ra0.8-Ra1.6 kom ua tiav qhov chaw siab, tshwj xeeb tshaj yog qhov tseem ceeb rau cov tsos thiab cov khoom siv kho qhov muag. Rau cov geometry nyuaj, kev tsim kab sib faib yuav tsum tsis txhob muaj cov yam ntxwv tsis zoo, thaum ua kom zoo dua kab noj hniav radii pab txo qis kev ntxhov siab thiab tiv thaiv kev tawg.
2. Kev tsim kho qhov cua tshuab
Thaum lub sij hawm BMC molding, kho thiab hla - txuas cov tshuaj tiv thaiv tso pa tawm; Qhov cua tsis txaus tuaj yeem ua rau muaj cua nkag, hlawv, lossis cov voids sab hauv. Yog li ntawd, ib qho kev ua haujlwm zoo yog qhov tseem ceeb. Lub qhov grooves feem ntau yog 0.01-0.03 hli sib sib zog nqus thiab hloov kho raws li iav fiber ntau ntev thiab resin viscosity kom tso pa tawm tsis muaj cov khoom to. Cov qhov cua yuav tsum tau muab tso rau ntawm qhov kawg ntws, tom qab tav thiab tus thawj coj, thiab ntau - theem kev ua pa tawm tau pom zoo rau qhov chaw nyuaj.
3. Temperature Control System Tsim
Raws li cov khoom siv thermosetting, BMC yog qhov rhiab heev rau qhov kub thiab txias thaum kho. Uniform pwm kub faib ncaj qha cuam tshuam cov khoom sib xws. Pwm ua hauj lwm saum npoo kub yog feem ntau tswj ntawm 140℃thiab 170 degree, nrog rau qhov kub thiab txias sib txawv ntawm kab noj hniav cov ntsiab lus nruj me ntsis tswj nyob rau hauv ± 5 degree. Rau cov tuab-cov phab ntsa lossis cov ntu ntu, yuav tsum muaj kev tswj xyuas qhov kub thiab txias. Cov txheej txheem cua sov yuav tsum tau ua kom zoo dua los ntawm kev sim ntsuas qhov ntsuas kub kom tsis txhob muaj qhov chaw kub kub, thiab ua ke nrog lub siab - qhov ntsuas kub tswj kev tawm tswv yim los xyuas kom meej qhov sib xws thiab ua tiav kev kho cov tshuaj tiv thaiv, txo lub voj voog molding, thiab txhim kho cov khoom lag luam.
4. Gating System Tsim
Lub rooj vag system yuav tsum tau ua kom zoo raws li qhov loj thiab cov qauv ntawm ib feem. Qhov ntev ntawm lub rooj vag yuav tsum yog qhov loj me me - loj dhau tuaj yeem ua rau flash, thaum me me dhau tuaj yeem ua rau cov khoom tsis zoo thiab cov pwm tsis txaus. Rau qhov loj, ntau lub rooj vag tuaj yeem siv los xyuas kom meej tias cov khoom faib khoom; rau qhov precision qhov chaw, rooj vag yuav tsum tau muab tso rau ntawm qhov tsis yog - zoo nkauj qhov chaw kom txo qis ncej- molding trimming ua hauj lwm. Khiav tsim yuav tsum du, zam qhov chaw tuag kom txo tau cov khoom khaws cia thiab pov tseg, thaum tseem ua kom yooj yim tu.
(3) Cov ntsiab lus tseem ceeb hauv cov txheej txheem pwm pwm
BMC cov khoom siv molding feem ntau ntiav compression molding, hloov molding, thiab txhaj tshuaj molding. Cov txheej txheem tsis ua haujlwm rau txhua txoj kev yuav tsum tau ua kom zoo raws li cov yam ntxwv ntawm cov khoom:
1. Compression molding: Haum rau nruab nrab thiab me me -qhov loj, complex- zoo li cov khoom. Lub molding siab yog tswj ntawm 10 thiab 50 MPa, nrog rau qhov kub thiab txias ntawm 140-170 degree. Lub sij hawm tuav tau hloov kho raws li cov khoom tuab (feem ntau 2-10 feeb) kom paub meej tias cov khoom tiav tiav.
2. Hloov molding: Haum rau precision, complex qhov chaw nrog inserts, nrog ib tug molding siab ntawm 20-80 MPa, kub ntawm 150-180 degree, thiab hloov lub sij hawm ntawm 1-5 feeb. Cov ntaub ntawv hloov ceev yuav tsum tau ua tib zoo tswj kom tsis txhob iav fiber ntau tawg.
3. Txhaj Moulding: Haum rau nruab nrab thiab me me - cov khoom loj hauv kev tsim khoom loj, nrog kev txhaj tshuaj siab ntawm 50-150 MPa, chim kub ntawm 80-120 degree, thiab pwm kub ntawm 140-170℃. Kev txhaj tshuaj ceev yuav tsum tau ua tib zoo tswj kom txo qis kev ntxhov siab hauv cov khoom.
(IV) Pwm tu thiab tu
BMC cov khoom muaj cov iav fibers, uas tuaj yeem ua rau hnav cov kab noj hniav thiab cov neeg khiav dej num thaum lub sij hawm molding. Yog li ntawd, cov pwm yuav tsum tau saib xyuas tsis tu ncua. Cov khoom seem nyob rau hauv cov kab noj hniav thiab cov neeg khiav dej num yuav tsum tau muab ntxuav tam sim tom qab molding los tiv thaiv cov tawv nqaij, uas yuav ua rau kev ntxuav nyuaj thiab ua rau cov pwm puas. Cov pwm kev taw qhia thiab ejection mechanisms yuav tsum tau kuaj xyuas tsis tu ncua, lubricated, thiab ua kom txav mus los. Kab noj hniav yuav tsum tau polished ib ntus, thiab hnav cov chaw kho kom muaj pwm raug. Tsis tas li ntawd, cov pwm yuav tsum tsis txhob cuam tshuam rau qhov kub thiab txias; thaum tsis muaj zog, tiv thaiv- kev ntsuas xeb yuav tsum tau ua kom ntev lawv lub neej kev pab cuam.
III. Qhov zoo thiab kev xav hauv BMC Material Mould Applications
(I) Daim Ntawv Thov Qhov Zoo
1. Cov khoom lag luam ruaj khov:Ua tsaug rau cov khoom zoo ntawm BMC cov khoom, cov khoom pwm tuaj yeem pom qhov tseeb qhov tseeb, lub zog zoo tshaj plaws, kev ua haujlwm kub, thiab nplaim hluav taws kub, ua tau raws li qhov yuav tsum tau ua hauv ntau yam kev siv.
2. Kev ua haujlwm siab ntau lawm:Lub voj voog pwm luv luv, tsim nyog rau kev tsim khoom loj, thiab cov khoom tiav yuav tsum tsis muaj kev tshaj tawm txoj haujlwm- ua, yog li txo cov nqi tsim khoom.
3. Ntev pwm kev pab cuam lub neej:Ua los ntawm siab- pwm hlau zoo, ua ke nrog kev tsim qauv tsim nyog thiab kev saib xyuas kom zoo, pwm tuaj yeem kav ntev dua 100,000 cycles, ua tau raws li qhov ntev - lub sijhawm ntau lawm.
4. Ib puag ncig tus phooj ywg thiab lub zog -nrawm:BMC cov khoom emissions qis VOCs thaum lub sij hawm molding txheej txheem, thiab ib co muab tub lim tuaj yeem siv tau, ua raws li cov qauv tsim ntsuab, thaum lub pwm tsim cov txheej txheem siv lub zog qis.
(2) Kev ceev faj
1. Khoom siv ua ntej-kev kho mob:BMC cov ntaub ntawv yuav tsum tau preheated (feem ntau yog 80-100℃rau 10-20 feeb) ua ntej siv los tshem tawm cov dej noo thiab huab cua npuas, tiv thaiv qhov tsis zoo ntawm cov khoom zoo.
2. Pwm Precision Control:Kev tswj xyuas nruj ntawm pwm qhov tseeb thiab qhov roughness yog qhov yuav tsum tau ua, tshwj xeeb tshaj yog rau cov khoom precision thiab sab nrauv, tiv thaiv cov khoom tsis xws luag los ntawm pwm tsis raug.
3. Txheej txheem Parameter Optimization:Thaum lub sij hawm molding txheej txheem, tsis xws li kub, siab, thiab lub sij hawm yuav tsum tau optimized raws li cov khoom qauv thiab cov ntaub ntawv formulation kom tsis txhob muaj qhov tsis xws luag xws li hauv qab -kho, tshaj -kho, thiab warping deformation.
4. Insert Handling:Yog tias cov khoom muaj cov hlau ntxig, cov ntawv ntxig yuav tsum tau preheated ua ntej kom tsis txhob muaj kev sib raug zoo ntawm cov khoom ntxig thiab BMC thaum lub sij hawm molding vim qhov kub sib txawv, uas tuaj yeem ua rau tawg.
IV. Cov ntsiab lus
Ua tsaug rau nws cov khoom siv zoo heev, qhov ruaj khov, qhov kub tsis kam, nplaim hluav taws xob, hluav taws xob rwb thaiv tsev, thiab cov txheej txheem zoo, BMC cov khoom ua lub luag haujlwm tseem ceeb hauv kev siv pwm thoob plaws kev lag luam xws li cov khoom siv hluav taws xob, tsheb, kev tsim kho, thiab cov khoom siv hauv tsev. Pwm tsim rau BMC yuav tsum tsom rau cov kab noj hniav precision, lub tshuab ua pa, tswj qhov kub thiab txias, thiab cov kab noj hniav. Los ntawm kev txhim kho cov txheej txheem molding raws li cov yam ntxwv ntawm cov khoom siv thiab kev tswj xyuas pwm kom zoo, qhov kev ua tau zoo ntawm BMC tuaj yeem ua tiav tiav, ua kom cov khoom lag luam siab - zoo, ruaj khov heev. Nrog rau kev nce qib hauv cov khoom siv thev naus laus zis, kev txhim kho tsis tu ncua ntawm siab -kev ua tau zoo thiab eco- cov ntaub ntawv BMC tus phooj ywg yuav nthuav dav ntxiv rau lawv cov ntawv thov pwm, muab cov khoom siv zoo tshaj plaws rau kev tsim khoom siab heev.
