Kanagirazi rovings or mapfupi egirazi fibers, yekutanga fiberglass or precio fibra de carbonoinowedzerwa kune thermoplastic matrix, chinangwa chiri chekuvandudza michina uye maumbirwo emhando yepolymer.Pane misiyano mizhinji pakati penzira mbiri huru dzekusimbisa thermoplastics yekuumba jekiseni, kubva pakusanganiswa kwadzinoitwa nepolymer matrix, kusvika pamwero wekuita kwadzinogona kupa, uye imwe fiber fomu inogona kunge yakanyanya Imwe yacho yakakodzera, asi iyo shaper, musiyano mukuru pakati pemapfupi uye marefu fiber ndiwo dhigirii yaanogadziriswa.
Kugadzira refu fiber yakasimbisa thermoplastics
Chinangwa chikuru chekugadzirisa refu-fiber-yakasimbiswa thermoplastics ndeyekuchengetedza kureba kwefiber, izvo zvakakosha pakugadzirisa simba uye kuoma.Kutyoka kwefiber kunogona kukanganisa zvimiro zvepolymer composite uye zvinogona kupedzisira zvaramba mabhenefiti ekushandisa girazi fiber shinda.Kubata zvisina kufanira uye kutadza kwekushandisa uye dhizaini yechikamu, kana kushandiswa kweisina optimized yekugadzirisa michina kana setups, inogona kutungamirira kune fiber kuputsika.
Kusiyana nemapurasitiki akachekwa akasimbiswa, fiber refu yakasimbiswa zvinhu zvinowanzogadzirwa nepultrusion.Nzira yacho inosanganisira kutambanudzagirazis rovingkuisirwa ne thermoplastic resin kuburikidza neakakosha inpregnation kufa (kuitira kuti resin ikwanise kutenderedza nekusunga ma fiber), uye wocheka tambo dzakaburitswa kuita pellets, fiber mumapellets anowanzo 12mm Iyo yakareba, yakazara-kureba inoratidza unidirectional fiber reinforcement. , uye kureba uku kwakakosha pakugonesa iyo polima kuti ikwanise kutamisa kushushikana kune yakasimba fiber.
Kana aya mapellets achishandiswa kuumba jekiseni, mafiibhi akareba anoenderana uye akakuvara zvakasimba kuti aumbe skeleton yemukati inopa simba uye kuoma.Kuenzaniswa nepfupi-fiber yakazadzwa zvinhu, macomposites anosimbiswa neakareba fiber, ingavefiberglass fiberskana kabhoni fibers, inopa yakakwira simba-ku-huremu reshiyo, kuomarara kwemaitiro, hupenyu hurefu hwekuneta kwe cyclic, uye hupamhi hwekupisa kupisa uye kugadzikana kwedimensional kuri nani.
Izvi zvinogara kwenguva refu zvinopa kuita kwemaitiro akafanana nesimbi, asi zvakareruka pane simbi, uye vanokwanisa kutora mukana wekugadzirisa mabhenefiti ekuumba jekiseni.1k carbon fiber jirainonyanya kukosha sechitsividzo chesimbi nekuti i70% yakareruka pane simbi uye yakareruka kupfuura simbi.Aluminium ine 40% yakareruka, saka-refu-fiber-yakasimbiswa macomposites anogona kushandiswa kugadzira zvinhu zvinoda mumotokari, zvinhu zvemitambo, ndege, zvinhu zvevatengi uye zvigadzirwa zvemaindasitiri.Yakajairika base resins inosanganisira polyamide (PA kana nylon), polypropylene (PP), rigid thermoplastic polyurethane (ETPU), uye yakakwirira tembiricha resin senge polyetheretherketone (PEEK), polyphthalamide (PPA), uye polyamide.Ether imide (PEI) nezvimwewo Kunyange zvazvo chero thermoplastic inogona kusimbiswa nefibers, vamwe chete vanopa kushanda kwepamusoro nokuti vanosimbiswa zviri nani.Kunyanya, semi-crystalline resins inosimbiswa zviri nani nefibers kupfuura amorphous resins, zvinoreva kuti kuoma kwavo uye simba rinowedzera zvakanyanya.
Kugadzirisa Mapoinzi eMarefu Fiber Yakasimbiswa Zvinhu
Kuenzaniswa neisina kugadziridzwa kana granular poda-yakazadzwa resins, kuumba refu fiber yakasimbiswa composites ine zvimwe zvinodikanwa pane mold, magedhi, midziyo yekuumba, uye chikamu dhizaini.Maitiro anoshandiswa kugadzira zvinhu izvi zvakare akasiyana kubva kune mapfupi fiber reinforced polymers.
Sezvambotaurwa, kuchengetedza hurefu hwefiber ndiyo kiyi yekubudirira.Zvinhu zvinogona kukonzera kureba kwefiber zvinosanganisira kudzvanywa kwakanyanya uye kugera kubva kune jekiseni screw, sezvingaite makona akapinza muforoma uye mumhanyi system.Kuti uchengetedze hurefu hwefiber, pane matatu akakosha ekugadzirisa mapoinzi ekuziva:
1. Mold zvinhu uye kugadzira
Kunyange zvazvo tambo refu dzichipfeka zvishoma pane mold pane mapfupi fiber nokuti kune shoma shoma-yakafanana nefiber inogumira iyo inobata mold, iyo yakafanana mhando yesimbi yesimbi inokodzera zvose marefu-fiber uye mapfupi-fiber akasimbiswa mapolymers, anonyanya kuzivikanwa. iri P20 mold simbi, inogona kumira majekiseni anopfuura 100,000 nguva dzose.Kana kusimba kwepamusoro kuchidiwa (pamusoro pe100,000 jekiseni cycle), H13 chrome molybdenum simbi kana A9 mhepo yakaomeswa simbi isarudzo dziri nani.Kazhinji, mold dzakaomeswa ndiyo yakanakisa sarudzo yekugadzirisa fiber-reinforced thermoplastics.Kune akasakara molds, anogona kugadziridzwa uchishandisa electroplating tekinoroji.Aluminium molds inogona kutoshandiswa kana prototypes ichifanira kugadzirwa kuitira kusimbisa dhizaini.
2. Kuumba midziyo
Yakareba-fiber yakasimbiswa thermoplastics inogona kugadziriswa uchishandisa yakajairwa jekiseni rekuumba midziyo ine mashoma mashoma asina-anogara magadzirirwo kuchengetedza faibha kureba uye kugarisa epamusoro viscosities.A low pressure kana general purpose screw ine ringi risingadzoke rinobvumira kuyerera kwemahara kumusoro kunokurudzirwa.General-chinangwa nozzles inogona kushandiswa, asi naironi nozzles dzinofanira kudzivirirwa nekuti yavo hourglass chimiro (yakagadzirirwa kudzivirira drooling) inorambidza kuyerera, kugadzira shear, uye kukonzera faibha abrasion.Imwe matipi ekudzikisa shear ndeye kudzivirira inverted cone nozzle dhizaini.Kazhinji, maburi mahombe emhuno (zvishoma 5.6 mm) anofambisa mafambiro e-viscous fiber-reinforced resins.
Mutemo wakanaka wegunwe kune chero muchina wejekiseni ndeye kungobaya 60-70% yehuwandu.Saizi yekupfura yakawandisa inowedzera nguva yekumisikidza, nepo saizi shoma shoma inoreva kuti zvinhu zvinogara mudhiramu kwenguva yakareba, zvichizotungamira mukudzikira.
3. Mamiriro ekugadzirisa
Nezve kugadzirisa kune chekuita, zvakakosha kugadzirisa nyaya mbiri: warpage uye creep.Kazhinji, fiber refu yakasimbiswa thermoplastic zvikamu zvinosangana nehondo shoma panepfupi tambo fiberglasszvidimbu nekuti kupetwa kwefilament kunoderedza kuderera kwekusiyana, asi jekiseni rakaumbwa refu fiber zvikamu zvichiri kuremadza, chimwe chikonzero chiri chekuti mafiber anoyerera achitevedza Oriental alignment, uku achiwedzera simba rechikamu, anogona kutungamira kune anisotropy.Kuti udzivise warping, dzimwe nzvimbo dzegedhi kana chikamu magadzirirwo anogona kushandiswa kudzivirira yakawandisa faibha alignment munzvimbo dzisingade simba rakawanda kutsungirira mitoro yezvimiro.
Chengetedza zvakanakira fiber refu
Kubudirira kuumbwa kweakareba fiber reinforced composites kunoda kumwe kugadziridzwa kwegwara rekugadzira uye kugadzirisa paramita inoshanda kune isina-yakasimbiswa resin uye mapfupi fiber makomisheni.Kuti uwane zvakanyanya kubva kune refu fiber reinforcements (iyo inodhura kupfuura isina kuzadzwa zvinhu kanafiberglass yakachekwa tambo kusimbisanekuda kwekuita kwavo kwepamusoro), maitiro akanakisa anofanirwa kuteverwa mukati mekuita.Kana mafiber akareba akatyoka kana kusarongeka nekuda kwekubata zvisirizvo, dhizaini yekufa kana kuseta michina, simba ravo repamusoro uye kuoma kwakakwirira mabhenefiti anodzikira kana kutorasikirwa.
#girazi rovings#mapfupi egirazi fibers#1k carbon fiber jira#pfupi tambo fiberglass#fiberglass yakachekwa tambo kusimbisa
Nguva yekutumira: Oct-21-2022