Ngokufunda umphumela wemithamo ehlukene ye-hydroxypropyl methylcellulose (HPMC) ekuphrintekeni, izakhiwo ze-rheological kanye nezakhiwo zemishini ze-3D printing mortar, kwaxoxwa ngomthamo ofanele we-HPMC, futhi indlela yawo yokuthonya yahlaziywa kuhlanganiswe nokwakheka kwe-microscopic. Imiphumela ikhombisa ukuthi ukugeleza kwe-mortar kwehla ngokwanda kokuqukethwe kwe-HPMC, okungukuthi ukugeleza kwehla ngokwanda kokuqukethwe kwe-HPMC, kodwa ikhono lokugcina ukugeleza liyathuthuka. Ukugeleza; izinga lokugcina ukuma kanye nokumelana nokungena ngaphansi kwesisindo sakho kuyanda kakhulu ngokwanda kokuqukethwe kwe-HPMC, okungukuthi, ngokwanda kokuqukethwe kwe-HPMC, ukugeleza kwe-stack kuyathuthuka futhi isikhathi sokuphrinta siyandiswa; ngokombono we-rheology, kanye nokwanda kokuqukethwe kwe-HPMC, ukugeleza kwe-viscosity okubonakalayo, ukucindezeleka kwesivuno kanye nokugeleza kwepulasitiki kwe-slurry kwanda kakhulu, futhi ukugeleza kwe-stackability kwathuthuka; i-thixotropy yaqala yanda yabe isincipha ngokwanda kokuqukethwe kwe-HPMC, futhi ukugeleza kwathuthuka; Okuqukethwe kwe-HPMC kukhuphukile Ukuphakama kakhulu kuzokwenza ukuthi i-mortar porosity ikhule kanye namandla. Kunconywa ukuthi okuqukethwe kwe-HPMC akufanele kudlule u-0.20%.
Eminyakeni yamuva nje, ubuchwepheshe bokuphrinta nge-3D (okwaziwa nangokuthi "ukukhiqiza okwengeziwe") buthuthuke ngokushesha futhi busetshenziswe kabanzi emikhakheni eminingi efana nobunjiniyela bezinto eziphilayo, izindiza, kanye nokudala ubuciko. Inqubo yobuchwepheshe bokuphrinta nge-3D engenasikhunta ithuthukise kakhulu izinto zokwakha kanye nokuguquguquka komklamo wesakhiwo kanye nendlela yayo yokwakha ezenzakalelayo ayigcini nje ngokusindisa abasebenzi, kodwa futhi ifanelekela amaphrojekthi okwakha ezindaweni ezahlukahlukene ezinzima. Ukuhlanganiswa kobuchwepheshe bokuphrinta nge-3D kanye nensimu yokwakha kuyinto entsha futhi ethembisayo. Njengamanje, izinto ezisekelwe kusimende ze-3D Inqubo emele yokuphrinta inqubo yokufaka i-extrusion (kufaka phakathi inqubo yokwenza i-contour) kanye nokuphrinta ukhonkolo kanye nenqubo yokubopha i-powder (inqubo yesimo se-D). Phakathi kwazo, inqubo yokufaka i-extrusion inezinzuzo zomehluko omncane enkambisweni yokubumba ukhonkolo yendabuko, ukusebenziseka okuphezulu kwezingxenye ezinkulu kanye nezindleko zokwakha. Inzuzo ephansi isibe yizindawo ezishisayo zocwaningo zamanje zobuchwepheshe bokuphrinta nge-3D bezinto ezisekelwe kusimende.
Izinto ezisekelwe kusimende ezisetshenziswa “njengezinto zoyinki” zokunyathelisa nge-3D, izidingo zazo zokusebenza zihlukile kwezezinto ezisekelwe kusimende ezijwayelekile: ngakolunye uhlangothi, kunezidingo ezithile zokusebenza kwezinto ezisekelwe kusimende ezisanda kuhlanganiswa, futhi inqubo yokwakha idinga ukuhlangabezana nezidingo zokukhipha okubushelelezi. Ngakolunye uhlangothi, izinto ezisekelwe kusimende ezikhishwe kudingeka zihlanganiswe, okungukuthi, ngeke zidilike noma ziguquguquke kakhulu ngaphansi kwesenzo sesisindo sazo kanye nengcindezi yesendlalelo esiphezulu. Ngaphezu kwalokho, inqubo yokubopha yokunyathelisa nge-3D yenza izendlalelo phakathi kwezingqimba Ukuze kuqinisekiswe izakhiwo ezinhle zemishini yendawo yokuxhumana yezendlalelo, izinto zokwakha zokunyathelisa nge-3D kufanele futhi zibe nokunamathela okuhle. Ngamafuphi, ukwakheka kokungaguquki, ukungaguquki, kanye nokunamathela okuphezulu kuklanywe ngesikhathi esisodwa. Izinto ezisekelwe kusimende zingenye yezimfuneko zokusetshenziswa kobuchwepheshe bokunyathelisa nge-3D emkhakheni wokwakha. Ukulungisa inqubo yokumanzisa kanye nezakhiwo ze-rheological zezinto ezisetshenziswa njengesimende kuyizindlela ezimbili ezibalulekile zokuthuthukisa ukusebenza kokunyathelisa okungenhla. Ukulungiswa kwenqubo yokumanzisa izinto ezisebenzisa ukhonkolo Kunzima ukuyisebenzisa, futhi kulula ukubangela izinkinga ezifana nokuvaleka kwamapayipi; futhi ukulawulwa kwezakhiwo ze-rheological kudinga ukugcina ukugeleza ngesikhathi senqubo yokuphrinta kanye nesivinini sokwakheka ngemva kokubumba i-extrusion. Ocwaningweni lwamanje, ama-viscosity modifier, ama-mineral admixtures, ama-nanoclays, njll. avame ukusetshenziswa ukulungisa izakhiwo ze-rheological zezinto ezisekelwe kukhonkolo ukuze kufezwe ukusebenza okungcono kokuphrinta.
I-Hydroxypropyl methylcellulose (HPMC) iyi-polymer thickener evamile. Izibopho ze-hydroxyl kanye ne-ether ku-molecule chain zingahlanganiswa namanzi akhululekile ngezibopho ze-hydrogen. Ukuyifaka kukhonkrithi kungathuthukisa ngempumelelo ukuhlangana kwayo. kanye nokugcinwa kwamanzi. Njengamanje, ucwaningo ngomphumela we-HPMC ezimpahleni zezinto ezisekelwe kusimende lugxile kakhulu emthonjeni walo ekugelezeni, ukugcinwa kwamanzi, kanye ne-rheology, futhi ucwaningo oluncane olwenziwe ezimpahleni zezinto ezisekelwe kusimende zokunyathelisa ze-3D (njengokunwebeka, ukubekeka, njll.). Ngaphezu kwalokho, ngenxa yokuntuleka kwezindinganiso ezifanayo zokunyathelisa kwe-3D, indlela yokuhlola yokunyathelisa kwezinto ezisekelwe kusimende ayikakasungulwa. Ukubekeka kwezinto kuhlolwa ngenani lezingqimba eziphrintiwe ezine-deformation ebalulekile noma ukuphakama okuphezulu kokunyathelisa. Izindlela zokuhlola ezingenhla zincike ekucabangeni okuphezulu, ukuhlukahluka okungekuhle, kanye nenqubo enzima. Indlela yokuhlola ukusebenza inamandla amakhulu kanye nenani ekusetshenzisweni kobunjiniyela.
Kuleli phepha, izilinganiso ezahlukene ze-HPMC zethulwe ezintweni ezisekelwe kusimende ukuze kuthuthukiswe ukunyatheliswa kwesimende, kanti imiphumela yesilinganiso se-HPMC ezimpahleni zesimende zokunyathelisa ze-3D yahlolwa ngokuphelele ngokutadisha ukunyatheliswa, izakhiwo ze-rheological kanye nezakhiwo zemishini. Ngokusekelwe ezimpahleni ezifana nokugeleza kwamanzi Ngokusekelwe emiphumeleni yokuhlola, isimende esixutshwe nenani elifanele le-HPMC sakhethwa ukuze kuqinisekiswe ukunyatheliswa, futhi imingcele efanele yenhlangano ephrintiwe yahlolwa; ngokusekelwe ocwaningweni lwe-morphology encane yesampula, indlela yangaphakathi yokuguquka kokusebenza kwezinto zokunyathelisa yahlolwa. Ngesikhathi esifanayo, kwasungulwa izinto ezisekelwe kusimende wokunyathelisa we-3D. Indlela ephelele yokuhlola yokusebenza okuphrintiwe ukuze kukhuthazwe ukusetshenziswa kobuchwepheshe bokunyathelisa be-3D emkhakheni wokwakha.
Isikhathi sokuthunyelwe: Septhemba-27-2022