Resin transfer molding (RTM) maitiro ndeye yakajairwa mvura yekuumba maitiro kune fiber-yakasimbiswa resin based composite zvinhu, izvo zvinonyanya kusanganisira:
(1) Dhizaini faibha preforms zvinoenderana nechimiro uye mechini kuita zvinodiwa zvezvinodiwa zvikamu;
(2) Isa iyo yakagadziridzwa faibha preform muforoma, vhara mold uye woimanikidza kuti uwane inoenderana vhoriyamu chikamu chefiber preform;
(3) Pasi pechigadzirwa chejekiseni chehunyanzvi, jekiseni resin muforoma pane imwe dzvinyiriro uye tembiricha kubvisa mweya uye kuinyudza mufiber preform;
(4) Mushure mekunge iyo fiber preform yakanyudzwa zvachose muresin, maitiro ekurapa anoitwa pane imwe tembiricha kusvika maitiro ekurapa apera, uye chigadzirwa chekupedzisira chaburitswa.
Iyo resin yekufambisa kudzvanywa ndiyo huru parameter inofanirwa kudzorwa muRTM maitiro.Iyi dzvinyiriro inoshandiswa kukurira kushorwa kunowanikwa panguva yejekiseni mugomba rekuumbwa uye kunyudzwa kwezvinhu zvinosimbisa.Iyo nguva yekuti resin ipedze kutapurirana inoenderana nekudzvanywa kwesystem uye tembiricha, uye nguva pfupi inogona kuvandudza kugadzirwa kwakanaka.Asi kana iyo resin inoyerera mwero yakakwira zvakanyanya, iyo yekunamatira haigone kupinda mukati mekusimbisa zvinhu munguva, uye tsaona dzinogona kuitika nekuda kwekuwedzera kwekumanikidza system.Naizvozvo, zvinowanzodiwa kuti resin fluid level inopinda muforoma panguva yekutamisa haifanire kusimuka nekukurumidza kupfuura 25mm/min.Tarisa maitiro ekutamisa resin nekutarisa chiteshi chekuburitsa.Zvinowanzo fungirwa kuti nzira yekufambisa inopedzwa kana zviteshi zvese zvekutarisa paforoma zvafashukira glue uye zvisisabudise mabhuru, uye huwandu chaihwo hweresin hwakawedzerwa hwakafanana nehuwandu hunotarisirwa hweresin yakawedzerwa.Nokudaro, kuiswa kwezviputi zvemhepo kunofanira kunyatsofungwa.
Resin kusarudzwa
Kusarudzwa kweresin system ndiyo kiyi yeRTM maitiro.The optimal viscosity is 0.025-0.03Pa • s apo resin inobudiswa mugomba remuvhu uye nekukasira kupinda mumafiber.Polyester resin ine yakaderera viscosity uye inogona kupedzwa nekutonhora jekiseni pakamuri tembiricha.Nekudaro, nekuda kwekuita kwakasiyana kwezvinodiwa zvechigadzirwa, marudzi akasiyana eresin achasarudzwa, uye viscosity yavo haizove yakafanana.Naizvozvo, saizi yepombi uye jekiseni musoro unofanirwa kugadzirwa kuzadzisa kuyerera kwezvinodiwa zvakakosha zvikamu.Marezeni akakodzera RTM maitiro anosanganisira polyester resin, epoxy resin, phenolic resin, polyimide resin, nezvimwe.
Kusarudzwa kwezvinhu zvekusimbisa
Muchirongwa cheRTM, zvinosimbisa zvinhu zvinogona kusarudzwa senge girazi fiber, graphite fiber, kabhoni fiber, silicon carbide, uye aramid fiber.Mhando dzakasiyana-siyana dzinogona kusarudzwa zvinoenderana nezvinodiwa nedhizaini, kusanganisira mapfupi akacheka faibha, unidirectional machira, akawanda axis machira, kuruka, kuruka, zvepakati zvinhu, kana preforms.
Kubva pamaonero ekuita kwechigadzirwa, zvikamu zvinogadzirwa neichi chidimbu zvine yakakwira fiber vhoriyamu chikamu uye inogona kugadzirwa neyemuno fiber reinforcement zvinoenderana nechimiro chaicho chezvikamu, izvo zvinobatsira mukuvandudza kuita kwechigadzirwa.Kubva pamaonero emitengo yekugadzira, 70% yemutengo wezvikamu zvakaumbwa zvinobva kumitengo yekugadzira.Naizvozvo, nzira yekudzikisa mari yekugadzira inyaya yakakosha inoda kugadziriswa nekukurumidza mukugadzirwa kwezvinhu zvinosanganiswa.Kuenzaniswa neyechinyakare inopisa yekutsikirira tangi tekinoroji yekugadzira resin yakavakirwa composite zvinhu, iyo RTM maitiro haidi inodhura matangi miviri, ichideredza zvakanyanya mutengo wekugadzira.Uyezve, zvikamu zvinogadzirwa neRTM maitiro haaganhurwe nehukuru hwetangi, uye saizi yezvikamu inoshanduka, iyo inogona kugadzira yakakura uye yakakwirira-inoshanda composite zvikamu.Pakazere, maitiro eRTM akashandiswa zvakanyanya uye nekukasira kuvandudzwa mumunda wekugadzira zvinhu zvinosanganiswa, uye inosungirwa kuve iyo inotungamira maitiro mukugadzira zvinhu zvinoumbwa.
Mumakore achangopfuura, zvigadzirwa zvezvinhu zvakaumbwa muindasitiri yekugadzira aerospace zvishoma nezvishoma zvakachinja kubva kune zvisiri zvekutakura zvinhu uye zvidiki zvidiki kuenda kuzvinhu zvikuru zvinotakura zvinhu uye zvakakura zvakabatanidzwa zvikamu.Pane kudiwa kwekukurumidzira kwekugadzirwa kwezvinhu zvakakura uye zvepamusoro-soro zvinoumba composite.Naizvozvo, maitiro akadai senge vacuum yakabatsira resin kutamisa molding (VA-RTM) uye light resin transfer molding (L-RTM) akagadzirwa.
Vacuum yakabatsira resin kutamisa kuumba maitiro VA-RTM maitiro
Iyo vacuum yakabatsira resin kutamisa kuumbwa maitiro VA-RTM inzira tekinoroji inotorwa kubva kune yechinyakare RTM maitiro.Nzira huru yeiyi nzira ndeye kushandisa vacuum pombi uye zvimwe midziyo yekutsvaira mukati me mold uko kune fiber preform, kuitira kuti resin inopinzwa mu mold pasi pechiito chevacuum negative pressure, ichiwana infiltration process. iyo faibha preform, uye pakupedzisira kuomesa uye kuumba mukati me mold kuti uwane inodiwa chimiro uye faibha vhoriyamu chikamu chezvikamu zvezvinhu zvakaumbwa.
Kuenzaniswa neyechinyakare RTM tekinoroji, VA-RTM tekinoroji inoshandisa vacuum kupomba mukati me mold, iyo inogona kuderedza kumanikidza kwejekiseni mukati me mold uye kuderedza zvakanyanya deformation ye mold uye fiber preform, nekudaro ichidzikisa mashandiro ekuita kwemaitiro emidziyo uye mold. .Iyo zvakare inobvumira tekinoroji yeRTM kushandisa maforoma akareruka, ayo anobatsira kudzikisa mutengo wekugadzira.Naizvozvo, tekinoroji iyi inonyanya kukodzera pakugadzira zvikamu zvakakura zvinoumbwa, Semuyenzaniso, foam sandwich composite plate ndeimwe yezvinowanzoshandiswa zvikamu zvakakura mumunda wemuchadenga.
Pakazere, iyo VA-RTM maitiro akakodzera kwazvo kugadzirira yakakura uye yepamusoro-inoshanda aerospace composite zvikamu.Nekudaro, maitiro aya achiri semi mechanized muChina, zvichikonzera kuderera kwekugadzira chigadzirwa.Uyezve, dhizaini yemaparamita emaitiro anonyanya kuvimba neruzivo, uye dhizaini yakangwara haisati yaitwa, zvichiita kuti zviome kunyatso kudzora kunaka kwechigadzirwa.Panguva imwecheteyo, zvidzidzo zvakawanda zvakaratidza kuti kudzvanywa kwemagetsi kunogadzirwa zviri nyore munzira yekuyerera kweresin panguva iyi, kunyanya kana uchishandisa vacuum mabhegi, pachave neyakamwe dhigirii rekuzorora kumberi kwekuyerera kweresin, iyo ichave. kukanganisa kupinza resin, kukonzera mabhubhu kuti aumbe mukati meiyo workpiece, uye kuderedza michina yezvigadzirwa.Panguva imwecheteyo, kusaenzana kwekumanikidza kugovera kunokonzeresa kusaenzana ukobvu kugovera kweiyo workpiece, zvichikanganisa kutaridzika kweyekupedzisira workpiece, Iri zvakare idambudziko rehunyanzvi iro tekinoroji ichiri kuda kugadzirisa.
Chiedza resin kuendesa kuumba maitiro L-RTM maitiro
Iyo L-RTM maitiro ehuremu resin kutamisa kuumbwa imhando nyowani yetekinoroji yakagadziridzwa pahwaro hwechinyakare VA-RTM process tekinoroji.Sezvinoratidzwa mumufananidzo, chinhu chikuru cheiyi tekinoroji tekinoroji ndechekuti iyo yepasi mold inotora simbi kana imwe yakaomarara mold, uye iyo yepamusoro mold inotora semi rigid lightweight mold.Iyo yemukati ye mold inogadzirwa neyakavharika chisimbiso chimiro, uye chepamusoro mold inogadziriswa kunze kuburikidza ne vacuum, nepo mukati inoshandisa vacuum kuunza resin.Nekuda kwekushandiswa kwehafu-yakaomesesa mold mupamusoro mold yeiyi nzira, uye vacuum state mukati me mold, kudzvanywa mukati me mold uye mutengo wekugadzira we mold pachawo wakaderedzwa zvakanyanya.Iyi tekinoroji inogona kugadzira zvikamu zvakakura zvakaumbwa.Kuenzaniswa nemaitiro echinyakare eVA-RTM, ukobvu hwezvikamu zvakawanikwa neichi chiitiko chakanyanya kufanana uye kunaka kwepamusoro nepasi pepamusoro kwakakwirisa.Panguva imwecheteyo, kushandiswa kwesemi-rigid zvinhu mumhando yepamusoro inogona kushandiswa zvakare, Iyi tekinoroji inodzivirira kutambisa mabhegi evacuum muchiitiko cheVA-RTM, ichiita kuti ive yakanyatsokodzera kugadzira aerospace composite zvikamu zvine zvakakwirira zvemhando yepamusoro zvinodiwa.
Nekudaro, mukuita chaiko kwekugadzira, kuchine mamwe matambudziko ehunyanzvi mukuita uku:
(1) Nekuda kwekushandisa semi-yakaomesesa zvinhu mupamusoro mold, kusakwana kuomarara kwechinhu kunogona kutungamira kudonha panguva yevacuum yakagadziriswa mold process, zvichikonzera kusaenzana kwehuremu hwechishandiso uye kukanganisa kunaka kwayo.Panguva imwecheteyo, kuoma kwemuumbi kunobatawo hupenyu hwehuputi pachahwo.Maitiro ekusarudza akakodzera semi-akaomesesa zvinhu se mold yeL-RTM ndeimwe yematambudziko ehunyanzvi mukushandiswa kweiyi maitiro.
(2) Nekuda kwekushandiswa kwevacuum kupomba mukati meL-RTM process tekinoroji mold, kuiswa chisimbiso kwe mold kunoita basa rakakosha mukufambira mberi kwakanaka kwemaitiro.Kusaisa chisimbiso chisina kukwana kunogona kukonzera kusakwana kweresin kupinza mukati meiyo workpiece, nekudaro kukanganisa kushanda kwayo.Naizvozvo, mold yekuisa chisimbiso tekinoroji ndeimwe yematambudziko ehunyanzvi mukushandiswa kwemaitiro aya.
(3) Iyo resin inoshandiswa muL-RTM maitiro inofanirwa kuchengetedza yakaderera viscosity panguva yekuzadza kudzikisa kudzvanywa kwejekiseni uye kugadzirisa hupenyu hwesevhisi ye mold.Kugadzira yakakodzera resin matrix ndeimwe yematambudziko ehunyanzvi mukushandiswa kweichi chiitiko.
(4) Muchiitiko cheL-RTM, zvinowanzodiwa kugadzira nzira dzekuyerera pane mold kukurudzira yunifomu resin kuyerera.Kana iyo inoyerera chiteshi dhizaini isingaite, inogona kukonzera kukanganisa senge makwapa akaoma uye akapfuma girizi muzvikamu, zvichikanganisa zvakanyanya kunaka kwekupedzisira kwezvikamu.Kunyanya kune dzakaomarara nhatu-dimensional zvikamu, maitiro ekugadzira mold inoyerera chiteshi zvine musoro zvakare imwe yehunyanzvi hwekunetseka mukushandiswa kweichi chiitiko.
Nguva yekutumira: Jan-18-2024
