Ngokufunda isiphumo seedosi ezahlukeneyo ze-hydroxypropyl methylcellulose (HPMC) ekushicileleni, iipropathi zerheological kunye neepropathi zomatshini zodaka loshicilelo lwe-3D, idosi efanelekileyo ye-HPMC yaxoxwa, kwaye indlela yempembelelo yayo yahlalutywa idityaniswe ne-morphology ye-microscopic.Iziphumo zibonisa ukuba i-fluidity yodaka iyancipha ngokunyuka komxholo we-HPMC, oko kukuthi i-extrudability iyancipha ngokunyuka komxholo we-HPMC, kodwa amandla okugcina amanzi aphucula.Extrudability;izinga lokugcinwa kwemilo kunye nokuchasana nokungena phantsi kobunzima bokuzimela ukunyuka kakhulu ngokunyuka komxholo we-HPMC, oko kukuthi, ngokunyuka komxholo we-HPMC, ukugcinwa kwe-stackability kuphucula kunye nexesha lokushicilela lide;ukusuka kwindawo yokujonga i-rheology, kunye nokwanda komxholo we-HPMC, i-viscosity ebonakalayo, uxinzelelo lwesivuno kunye ne-plastiki viscosity ye-slurry yanda kakhulu, kwaye ukuqiniswa kuphuculwe;i-thixotropy kuqala yanda kwaye yehla ngokunyuka komxholo we-HPMC, kunye nokuprintwa kuphuculwe;umxholo we-HPMC unyukile Ukuphakama kakhulu kuya kubangela ukuba i-porosity yodaka inyuke kunye namandla Kunconywa ukuba umxholo we-HPMC ungadluli kwi-0.20%.
Kwiminyaka yakutshanje, i-3D yoshicilelo (ekwaziwa ngokuba "yimveliso eyongezelelweyo") iteknoloji iphuhliswe ngokukhawuleza kwaye isetyenziswe ngokubanzi kwiindawo ezininzi ezifana ne-bioengineering, i-aerospace, kunye nokudalwa kobugcisa.Inkqubo ye-mold-free ye-3D yokushicilela iteknoloji iye yaphucula kakhulu izinto kunye nokuguquguquka koyilo lwesakhiwo kunye nendlela yolwakhiwo oluzenzekelayo alugcini nje ukusindisa abasebenzi, kodwa lufanelekile kwiiprojekthi zokwakha kwiindawo ezahlukeneyo ezinzima.Ukudityaniswa kweteknoloji yoshicilelo lwe-3D kunye nebala lokwakha liyintsha kwaye liyathembisa.Okwangoku, imathiriyeli esekwe kwisamente i-3D Inkqubo emele yoshicilelo yinkqubo yokupakishwa kwe-extrusion (kubandakanywa ne-contour process contour crafting) kunye ne-concrete yokushicilela kunye nenkqubo yokudibanisa umgubo (inkqubo ye-D-shape).Phakathi kwabo, inkqubo yokupakisha i-extrusion ineenzuzo zokwahlukana okuncinci ukusuka kwinkqubo yokubumba yekhonkrithi yendabuko, ukunokwenzeka okuphezulu kwamacandelo amakhulu kunye neendleko zokwakha.I-advanteji engaphantsi ibe yindawo yangoku yoPhando lwe-3D yokushicilela iteknoloji yezinto ezisekelwe kwisamente.
Kwizinto ezisekelwe kwisamente ezisetyenziswa njenge "izinto ze-inki" zoshicilelo lwe-3D, iimfuno zabo zokusebenza zahlukile kwizinto eziqhelekileyo ezisekelwe kwisamente: kwelinye icala, kukho iimfuno ezithile zokusetyenzwa kwezinto ezintsha ezixutywe ngesamente, kwaye Inkqubo yokwakha kufuneka ihlangabezane neemfuno ze-extrusion egudileyo, Ngakolunye uhlangothi, izinto ezisekelwe kwi-samente ezikhutshweyo kufuneka zibekwe, oko kukuthi, aziyi kudilika okanye zikhubazeke kakhulu phantsi kwesenzo sobunzima bayo kunye noxinzelelo lwe-stackable. umaleko ophezulu.Ukongezelela, inkqubo ye-lamination ye-3D yoshicilelo yenza iileyile phakathi kweengqimba Ukuze kuqinisekiswe iimpawu ezintle zomatshini wendawo ye-interlayer interface, izinto zokwakha zokuprinta ze-3D kufuneka zibe nokubambelela kakuhle.Isishwankathelo, uyilo lwe-extrudability, stackability, kunye ne-adhesion ephezulu yenzelwe ngexesha elifanayo.Izinto ezisekelwe kwisamente yenye yezinto ezifunekayo zokusetyenziswa kweteknoloji yoshicilelo lwe-3D kummandla wokwakha.Ukulungelelanisa inkqubo ye-hydration kunye neempawu ze-rheological zezinto ze-cementitious zindlela ezimbini ezibalulekileyo zokuphucula ukusebenza koshicilelo olungentla.Ukulungelelaniswa kwenkqubo ye-hydration yezinto ze-cementitious Kunzima ukuphumeza, kwaye kulula ukubangela iingxaki ezifana nokuvala umbhobho;kunye nokulawulwa kweempawu ze-rheological kufuneka kugcinwe umbane ngexesha lenkqubo yokushicilela kunye nesantya sokwakheka emva kokubumba i-extrusion.Kuphando lwangoku, i-viscosity modifiers, i-mineral admixtures, i-nanoclays, njl njl. izixhobo zokufezekisa ukusebenza ngcono koshicilelo.
IHydroxypropyl methylcellulose (HPMC) yinto eqhelekileyo yepolymer thickener.Iibhondi ze-hydroxyl kunye ne-ether kwitsheyina lemolekyuli zinokudityaniswa namanzi asimahla ngeebhondi ze-hydrogen.Ukuyizisa kwikhonkrithi kunokuphucula ngokufanelekileyo ukudityaniswa kwayo.kunye nokugcinwa kwamanzi.Okwangoku, uphando malunga nomphumo we-HPMC kwiipropati zezinto ezisekelwe kwi-cement zigxininise kakhulu kwimpembelelo yayo kwi-fluidity, ukugcinwa kwamanzi, kunye ne-rheology, kunye nophando oluncinci lwenziwe kwiipropati ze-3D zokushicilela izinto ezisekelwe kwi-cement ( njengokwandiswa, ukuzinza, njl.).Ukongezelela, ngenxa yokungabikho kwemigangatho efanayo yoshicilelo lwe-3D, indlela yokuvavanya ukuprintwa kwezinto ezisekelwe kwi-samente ayikasungulwa.Ukuqiniswa kwezinto zivandlakanywa ngenani leeleya eziprintwayo ezinokuguqulwa okuphawulekayo okanye ubude bokushicilela.Ezi ndlela zovavanyo zingentla zixhomekeke ekuziphenduleni okuphezulu, ukulambatha jikelele, kunye nenkqubo enzima.Indlela yokuvavanya ukusebenza inamandla amakhulu kunye nexabiso kwisicelo sobunjineli.
Kweli phepha, imilinganiselo eyahlukeneyo ye-HPMC yaziswa kwizinto ezisekelwe kwisamente ukuphucula ukuprintwa kodaka, kunye nemiphumo yedosi ye-HPMC kwiipropati zodaka loshicilelo lwe-3D zavavanywa ngokubanzi ngokufunda ukuprinta, iipropati ze-rheological kunye neempawu zomatshini.Ngokusekwe kwiipropati ezifana nolwelo olumanzi Ngokusekwe kwiziphumo zovavanyo, udaka oluxutywe nesona sixa siphezulu se-HPMC sikhethelwe uqinisekiso loshicilelo, kwaye iiparamitha ezifanelekileyo zequmrhu elishicilelweyo zavavanywa;ngokusekelwe kuphononongo lwe-morphology ye-microscopic yesampuli, indlela yangaphakathi yenguqu yokusebenza kwezinto zokushicilela yaphononongwa.Ngelo xesha, i-3D yoshicilelo lwe-cement-based material yasekwa.Indlela yokuvavanya ebanzi yokusebenza okuprintwayo ukwenzela ukukhuthaza ukusetyenziswa kweteknoloji yoshicilelo lwe-3D kwintsimi yokwakha.
Ixesha lokuposa: Sep-27-2022