Ngokufunda umphumela wemithamo ehlukene ye-hydroxypropyllylylylylyl (HPMC) ekuphrintiwe, izimbotshana zembobo kanye nezimpahla zemishini zodaka lwe-3D lokuphrinta, futhi imithamo efanele ye-HPMC yahlaziywa, futhi inqubo yayo yethonya yahlaziywa ihlanganiswe ne-microscopic morphology. Imiphumela ikhombisa ukuthi uketshezi lodaka luyancipha ngokwanda kokuqukethwe kwe-HPMC, lokho kuncipha ukwenyuka ngokwanda kokuqukethwe kwe-HPMC, kepha amandla okugcinwa kwe-fluidity athuthuka. Ukukhishwa; ukwakheka kwesimo sokugcinwa kanye nokuphindiselwa kokuqina ngaphansi kokukhulisa ukuzilibazisa okubaluleke kakhulu ngokwanda kokuqukethwe kwe-HPMC, okungukuthi, ngokwanda kokuqukethwe kwe-HPMC, ukuguquguquka kwe-stackaty kanye nesikhathi sokuphrinta isikhathi eside; Kusukela ekubukweni kwe-Rheology, ngokukhuphuka kokuqukethwe kwe-HPMC, ukubonwa okubonakalayo, ukuvezwa kwengcindezi nokubonakaliswa kwepulasitiki kwepulasitiki kukhuphuke kakhulu, futhi ukusebenziseka kwenziwe ngcono; I-Thixotropy iqale yanda bese yehla ngokwanda kokuqukethwe kwe-HPMC, futhi ukuphrinta okuthuthukile; Okuqukethwe kwe-HPMC kukhuphuke kakhulu kuzokwenza ukuthi i-porsiotion yodumo yodonga lokukhulisa namandla kunconyelwa ukuthi okuqukethwe yi-HPMC akufanele kudlule u-HPMC.
Eminyakeni yamuva nje, ukuphrinta kwe-3D (eyaziwa nangokuthi "ukukhiqiza okungeziwe") kuthuthukiswe ngokushesha futhi kusetshenziswe kabanzi emikhakheni eminingi efana ne-bioelineering, e-aerospace, kanye nendalo yobuciko. Inqubo engenamahhala yobuchwepheshe bokuphrinta kwe-3D ithuthukise kakhulu impahla kanye nokuguquguquka komklamo wesakhiwo kanye nendlela yayo yokwakha ngaphandle kokugcina amandla amakhulu kakhulu, kepha futhi kufanelekile ukuthola amaphrojekthi okwakha ezindaweni ezahlukahlukene ezinokhahlo. Inhlanganisela yobuchwepheshe bokuphrinta we-3D kanye nenkambu yokwakha iyisisekelo futhi iyathembisa. Njengamanje, izinto zokwenza ukhula 3D Inqubo Yommeleli Yokuphrinta yinqubo yokufaka isitokisisi (kufaka phakathi inqubo ye-contour crafting) kanye nenqubo yokuphrinta kokhonkolo (inqubo ye-D-HOMNING). Phakathi kwazo, inqubo yokufaka isitokisisi inezinzuzo zomehluko omncane kwinqubo yokhonkolo yendabuko yokubumba, ukwenzeka okuphezulu kwezinto ezinkulu nezindleko zokwakha. Inzuzo ephansi iba yindawo yokucwaninga yamanje yocwaningo lwe-3D Technology ye-3D Prance Technical yezinto zokwenziwa ngosimende.
Ngezinto zokwenziwa ngosimende ezisetshenziswa njenge- "inki izinto" zokuphrinta ze-3D, izidingo zabo zokusebenza zihlukile kulokho okwenziwe ngokonamba okususelwa kumasimende, ngakolunye uhlangothi, kunezidingo ezithile zokwenziwa kwamasimende, okukhona, ngeke zihlaziswe noma zikhanye kakhulu ngaphansi kwesenzo sayo isisindo kanye nengcindezi yesendlalelo esingaphezulu. Ngaphezu kwalokho, inqubo yokukhanyiswa kokuphrinta kwe-3D yenza izingqimba phakathi kwezingqimba ukuze kuqinisekiswe izindawo ezinhle zemishini zendawo yokuxhumana yabahlangene, izinto zokwakha zokuphrinta ze-3D kufanele futhi zibe nokunamathela okuhle. Ngokufingqa, ukwakheka kokungezelwa, ukuncibilika, kanye nokunamathela okuphezulu kwenziwa ngasikhathi sinye. Izinto zokwenziwa ngosimende zingenye yezimfuneko zokusetshenziswa kobuchwepheshe bokuphrinta we-3D emkhakheni wokwakha. Ukulungisa inqubo ye-hydration kanye nezinto ezimbongini zezinto zokwakha i-ce memezelo kuyizindlela ezimbili ezibalulekile zokwenza ngcono ukusebenza okungenhla kokuphrinta. Ukulungiswa kwenqubo ye-hydration yezinto zokwakha i-cementional kunzima ukuzisebenzisa, futhi kulula ukudala izinkinga ezinjengokuvinjwa kwepayipi; Futhi ukulawulwa kwezinto ezimbongiwakheni kudinga ukugcina ubunkulunkulu ngesikhathi senqubo yokuphrinta kanye nesivinini esihlelekile ngemuva kokubumba kwamanje.
I-Hydroxypropyl methylcellulose (HPMC) iyisikhulu se-polymer esivamile. Amabhodlela e-Hydroxyl ne-ether ku-chain molecular angahlanganiswa namanzi wamahhala ngama-hydrogen bond. Ukwethula kukhonkolo kungathuthukisa kahle ubumbano bayo. nokugcinwa kwamanzi. Njengamanje, ucwaningo olwenziwe ngomphumela we-HPMC ezindaweni ezisetshenziswayo kasimende olusekelwe ku-fluority, ukugcinwa kwamanzi, kanye nokucwaninga okuncane okwenziwe kwizakhiwo zezinto zokwenziwa kokongiswa kukamasipala we-3D (njengokuncipha, ukuqina, njll.). Ngaphezu kwalokho, ngenxa yokuntuleka kwamazinga afanayo wokuphrinta we-3D, indlela yokuhlola yokuphrinta kwezinto zokwenziwa kosimende ayisasungulwa. Ukuchitheka kokuqukethwe kuhlolwe ngenombolo yezingqimba eziphrintiwe ezinokukhubazeka okukhulu noma ukuphakama okuphrinta okuphezulu. Izindlela zokuhlola ezingenhla zingaphansi kokuzitholela okuphezulu, ubuntu obubi, nenqubo eyinkimbinkimbi. Indlela yokuhlola ukusebenza inamandla amakhulu nenani kuhlelo lokusebenza lobunjiniyela.
Kuleli phepha, imithamo ehlukene ye-HPMC yangeniswa ezintweni ezisuselwa kumasimende ukwenza ngcono ukuphrinta kodaka, kanye nemiphumela yemithamo ye-HPMC kwizindawo zokuphrinta ze-3D ezihlolwe ngokuphelele ngokufunda, izimbotshana ze-rheological kanye nezakhiwo zemishini. Kususelwa kwizakhiwo ezifana ne-fluidity ngokususelwa emiphumeleni yokuhlola, udaka oluxutshwe nenani elifanele le-HPMC elikhethiwe ukuqinisekiswa kokuphrinta, futhi amapharamitha afanele ebhizinisi aphrintiwe ahlolwe; Kususelwa esifundweni se-microscopic morphology yesampula, indlela yangaphakathi yokuziphendukela kwemvelo yokuphrinta yahlolwa. Ngasikhathi sinye, kwasungulwa izinto zokuphrinta sikasimende se-3D. Indlela ebanzi yokuhlola ukusebenza okuphrintiwe ukuze kuthuthukiswe ukusetshenziswa kobuchwepheshe bokuphrinta we-3D emkhakheni wokwakha.
Isikhathi sePosi: Sep-27-2022