Nekudzidza maitiro emhando dzakasiyana dze hydroxypropyl methylcellulose (HPMC) pakudhinda, rheological properties uye mechanical properties ye 3D kudhinda dhaka, dosage yakakodzera yeHPMC yakakurukurwa, uye maitiro ayo akaongororwa akaongororwa akasanganiswa ne microscopic morphology. Mhedzisiro yacho inoratidza kuti kuyerera kwedhaka kunoderera nekuwedzera kwezviri mukati meHPMC, ndiko kuti extrudability inodzikira nekuwedzera kwezviri mukati meHPMC, asi iyo fluidity kuchengetedza kugona inovandudza. Extrudability; chiyero chekuchengetedza chimiro uye kuramba kwekupinda pasi pehuremu hunowedzera zvakanyanya nekuwedzera kweHPMC yemukati, ndiko kuti, nekuwedzera kweHPMC yemukati, stackability inovandudza uye nguva yekudhinda inorebeswa; kubva pakuona kwe rheology, pamwe nekuwedzera kwehuwandu hweHPMC, iyo inooneka viscosity, kushushikana kwegoho uye plastiki viscosity ye slurry yakawedzera zvakanyanya, uye stackability yakavandudzwa; iyo thixotropy yakatanga kuwedzera uye ndokuderera nekuwedzera kwezviri mukati meHPMC, uye kudhindwa kwakavandudzwa; zvinyorwa zveHPMC zvakawedzera Kunyanya kuchaita kuti dhaka porosity iwedzere uye simba Inokurudzirwa kuti zvinyorwa zveHPMC hazvifaniri kudarika 0.20%.
Mumakore achangopfuura, 3D kudhinda (inozivikanwawo se "additive kugadzira") tekinoroji yakasimukira nekukurumidza uye yakashandiswa zvakanyanya mundima dzakawanda senge bioengineering, aerospace, uye kugadzirwa kwehunyanzvi. Iyo mold-isina maitiro eiyo 3D yekudhinda tekinoroji yakavandudza zvakanyanya zvinhu uye Iko kuchinjika kwemaitiro ekugadzira uye otomatiki nzira yekuvaka haingo chengetedza zvakanyanya manpower, asiwo yakakodzera mapurojekiti ekuvaka munzvimbo dzakasiyana dzakaoma. Iko kusanganiswa kwe 3D tekinoroji yekudhinda uye nzvimbo yekuvaka inovandudza uye inovimbisa. Parizvino, simende-yakavakirwa zvinhu 3D Iyo inomiririra nzira yekudhinda ndiyo extrusion stacking process (kusanganisira iyo contour process contour crafting) uye kongiri kudhinda uye hupfu bonding process (D-shape process). Pakati pavo, iyo extrusion stacking process ine zvakanakira diki mutsauko kubva kune yechinyakare kongiri yekuumba maitiro, yakakwira inogoneka yehukuru-hukuru zvikamu uye mutengo wekuvaka. Iyo yakaderera mukana yave ikozvino Tsvagiridzo hotspots ye 3D yekudhinda tekinoroji yesimende-yakavakirwa zvinhu.
Kune zvigadzirwa zvesimende zvinoshandiswa se "inki zvinhu" zvekudhinda 3D, zvavanoda kuita zvakasiyana neizvo zvesemende-zvakavakirwa zvinhu: kune rimwe divi, pane zvimwe zvinodiwa pakushanda kwezvichangobva kusanganiswa sement-based materials, uye. nzira yekuvaka inoda kuzadzisa zvinodikanwa zvekutsvedzerera extrusion, Ukuwo, iyo yakawedzera simende-yakavakirwa zvinhu inoda kugadzika, kureva kuti, haizopunzike kana kukanganisa zvakanyanya pasi pekuita kwayo. uremu hwake uye kudzvanywa kweyepamusoro layer. Mukuwedzera, iyo lamination process ye 3D printing inoita mitsara pakati pematanho Kuti uve nechokwadi chemichina yakanaka yenzvimbo yeinterlayer interface, iyo 3D yekudhinda zvivakwa zvekuvaka inofanirawo kuve nekunamatira kwakanaka. Muchidimbu, dhizaini ye extrudability, stackability, uye yakakwirira adhesion yakagadzirwa panguva imwe chete. Cement-based materials ndeimwe yezvinodiwa pakushandiswa kwe 3D kudhinda tekinoroji mumunda wekuvaka. Kugadzirisa iyo hydration maitiro uye rheological zvimiro zvecementitious zvinhu inzira mbiri dzakakosha dzekuvandudza iri pamusoro kudhinda kuita. Kugadziriswa kweiyo hydration process ye cementitious zvinhu Zvakaoma kuita, uye zviri nyore kukonzera matambudziko akadai sekuvharika kwepombi; uye mutemo we rheological properties unoda kuchengetedza fluidity panguva yekudhinda uye kukurumidza kwekugadzirisa mushure mekugadzira extrusion.Mukutsvakurudza kwemazuva ano, viscosity modifiers, mineral admixtures, nanoclays, nezvimwewo zvinowanzoshandiswa kugadzirisa rheological properties ye simenti-based. zvinhu kuti uwane zvirinani kudhinda kuita.
Hydroxypropyl methylcellulose (HPMC) yakajairika polymer thickener. Mabhondi ehydroxyl neeether pacheni yemolecular anogona kusanganiswa nemvura yemahara kuburikidza nemabhondi ehydrogen. Kuipinza mukongiri kunogona kunyatso kuvandudza kubatana kwayo. uye kuchengetedza mvura. Parizvino, tsvagiridzo pamusoro pemhedzisiro yeHPMC pane zvivakwa zvesimende-yakavakirwa zvinhu zvakanyanya kutarisana nemhedzisiro yayo pamvura, kuchengetwa kwemvura, uye rheology, uye tsvakiridzo shoma yakaitwa pazvinhu zve3D kudhinda simende-based zvinhu ( senge extrudability, stackability, nezvimwewo). Mukuwedzera, nekuda kwekushayikwa kwemaitiro akafanana ekudhindwa kwe3D, nzira yekuongorora yekudhindwa kwesimende-based materials haisati yasimbiswa. Iyo stackability yezvinyorwa inoongororwa nehuwandu hwezvinyorwa zvinodhindwa zvine deformation yakakosha kana kureba kwekudhinda. Idzi nzira dzekuongorora dziri pamusoro dziri pasi pekuzviisa pasi kwepamusoro, kushata kwepasirese, uye maitiro akaomarara. Iyo nzira yekuongorora maitiro ine yakakura kugona uye kukosha muinjiniya application.
Mune bepa rino, madhasi akasiyana eHPMC akaunzwa mune simende-yakavakirwa zvinhu kuti ivandudze kudhindwa kwedhaka, uye mhedzisiro yeHPMC dosage pane 3D inodhinda dhaka zvivakwa zvakaongororwa zvakadzama nekudzidza kudhindwa, rheological zvivakwa uye michina. Kubva pane zvivakwa zvakaita se fluidity Zvichienderana nemhedzisiro yekuongorora, dhaka rakasanganiswa nehuwandu hwakakwana hweHPMC rakasarudzwa kuti ridhindwe kuoneswa, uye maparamendi akakodzera echinhu chakadhindwa akaedzwa; zvichibva pakudzidza kweiyo microscopic morphology yemuenzaniso, nzira yemukati yekuita shanduko yezvinhu zvekudhinda yakaongororwa. Panguva imwecheteyo, iyo 3D inodhinda simende-yakavakirwa zvinhu yakamiswa. Nzira yekuongorora yakazara yekudhinda kuita kuitira kusimudzira kushandiswa kwe 3D tekinoroji yekudhinda mumunda wekuvaka.
Nguva yekutumira: Sep-27-2022