Ngokufunda impembelelo yeedosi ezahlukeneyo ze-hydroxypropyl methylcellulose (HPMC) ekuprintweni, kwiimpawu ze-rheological kunye neempawu zoomatshini ze-3D printing mortar, kuxoxwe ngedosi efanelekileyo ye-HPMC, kwaye indlela yayo yempembelelo yahlalutywa kunye ne-microscopic morphology. Iziphumo zibonisa ukuba ukugeleza kwe-mortar kuncipha ngokunyuka komxholo we-HPMC, oko kukuthi ukugeleza kuncipha ngokunyuka komxholo we-HPMC, kodwa amandla okugcina ukugeleza ayaphucuka. Ukugeleza; izinga lokugcina imo kunye nokumelana nokungena phantsi kobunzima bokuzithwala kuyanda kakhulu ngokunyuka komxholo we-HPMC, oko kukuthi, ngokunyuka komxholo we-HPMC, ukugeleza kwe-stack kuyanda kwaye ixesha lokuprinta liyandiswa; ngokwembono ye-rheology, kunye Ngokunyuka komxholo we-HPMC, ukugeleza okubonakalayo, uxinzelelo lwemveliso kunye nokugeleza kweplastiki kwe-slurry kwanda kakhulu, kwaye ukugeleza kwe-stack kuphucukile; i-thixotropy yaqala yanda yaze yancipha ngokunyuka komxholo we-HPMC, kwaye ukugeleza kwe-print kuphucukile; Umxholo we-HPMC unyukile Ukuphakama kakhulu kuya kubangela ukuba i-mortar porosity inyuke kunye namandla. Kucetyiswa ukuba umxholo we-HPMC ungadluli kwi-0.20%.
Kwiminyaka yakutshanje, iteknoloji yokuprinta nge-3D (ekwaziwa ngokuba yi-"additive manufacturing") iphuhliswe ngokukhawuleza kwaye isetyenziswa kakhulu kwiindawo ezininzi ezifana nobunjineli bezinto eziphilayo, i-aerospace, kunye nokudala ubugcisa. Inkqubo yokushicilela nge-3D engenasikhunta iphucule kakhulu izinto kwaye ukuguquguquka koyilo lwesakhiwo kunye nendlela yayo yokwakha ezenzekelayo ayigcini nje ngokusindisa abasebenzi, kodwa ikwalungele iiprojekthi zokwakha kwiindawo ezahlukeneyo ezinzima. Ukudibanisa iteknoloji yokuprinta nge-3D kunye nentsimi yokwakha kuyintsha kwaye kuyathembisa. Okwangoku, izinto ezisekelwe kwisamente yinkqubo yokuprinta ye-3D emele inkqubo yokupakishwa kwe-extrusion (kubandakanya ukwenza i-contour process) kunye nokuprinta ngesamente kunye nenkqubo yokubophelela umgubo (inkqubo yesimo se-D). Phakathi kwazo, inkqubo yokupakishwa kwe-extrusion ineengenelo zomahluko omncinci kwinkqubo yokubumba ikhonkrithi yendabuko, ukuba nokwenzeka okuphezulu kwezinto ezinkulu kunye neendleko zokwakha. Inzuzo ephantsi ibe ziindawo eziphambili zoPhando lwetekhnoloji yokuprinta nge-3D yezinto ezisekelwe kwisamente.
Kwizinto ezisekelwe kwisamente ezisetyenziswa njenge "izinto zeinki" zokuprinta nge-3D, iimfuno zazo zokusebenza zahlukile kwezo zezixhobo ezisekelwe kwisamente ngokubanzi: kwelinye icala, kukho iimfuno ezithile zokusebenza kwezixhobo ezisandula ukuxutywa ezisekelwe kwisamente, kwaye inkqubo yokwakha kufuneka ihlangabezane neemfuno zokukhupha okugudileyo. Kwelinye icala, izinto ezisekelwe kwisamente ezikhutshiweyo kufuneka zibekwe ndawonye, oko kukuthi, aziyi kuwa okanye ziguquguquke kakhulu phantsi kwesenzo sobunzima bazo kunye noxinzelelo lomaleko ongaphezulu. Ukongeza, inkqubo yokulamina yokushicilela nge-3D yenza amaleko phakathi kwamaleko. Ukuze kuqinisekiswe iipropati ezilungileyo zoomatshini kwindawo yokudibanisa amaleko aphakathi, izixhobo zokwakha zokuprinta nge-3D kufuneka nazo zibe nokunamathela okuhle. Ngamafutshane, uyilo lokukhutshelwa, ukunamathela okuphezulu, kunye nokunamathela okuphezulu kuyilwe ngaxeshanye. Izinto ezisekelwe kwisamente zezinye zezinto ezifunekayo ekusetyenzisweni kwetekhnoloji yokuprinta nge-3D kwicandelo lokwakha. Ukulungisa inkqubo yokufunxa amanzi kunye neepropati ze-rheological zezinto ezisetyenziswa kwisamente ziindlela ezimbini ezibalulekileyo zokuphucula ukusebenza kokuprinta okungentla. Ukulungiswa kwenkqubo yokufunxa amanzi kwizinto ezisebenzisa isamente Kunzima ukuyisebenzisa, kwaye kulula ukubangela iingxaki ezifana nokuvaleka kwemibhobho; kwaye ukulawulwa kweempawu ze-rheological kufuneka kugcinwe ukugeleza ngexesha lenkqubo yokuprinta kunye nesantya sokwakha emva kokubumba i-extrusion. Kolu phando lwangoku, ii-viscosity modifiers, ii-mineral admixtures, ii-nanoclays, njl.njl. zihlala zisetyenziselwa ukulungisa iimpawu ze-rheological zezinto ezisekelwe kwisamente ukuze kufezekiswe ukusebenza ngcono kokuprinta.
I-Hydroxypropyl methylcellulose (HPMC) yinto eqhelekileyo yokutyebisa i-polymer. Iibhondi ze-hydroxyl kunye ne-ether kwi-molecular chain zinokudityaniswa namanzi akhululekileyo ngokusebenzisa iibhondi ze-hydrogen. Ukuyifaka kwikhonkrithi kunokuphucula ngempumelelo ukuhambelana kwayo. kunye nokugcinwa kwamanzi. Okwangoku, uphando malunga nempembelelo ye-HPMC kwiimpawu zezinto ezisekwe kwisamente lugxile kakhulu kwimpembelelo yayo ekuguquguqukeni, ukugcinwa kwamanzi, kunye ne-rheology, kwaye uphando oluncinci lwenziwe kwiimpawu zezinto ezisekwe kwisamente yokuprinta ye-3D (ezifana nokukhutshelwa ngaphandle, ukunamathela, njl.njl.). Ukongeza, ngenxa yokungabikho kwemigangatho efanayo yokuprinta ye-3D, indlela yokuvavanya ukuprintwa kwezinto ezisekwe kwisamente ayikamiselwa. Ukunamathela kwezinto kuvavanywa ngenani leeleya eziprintwayo ezine-deformation ebalulekileyo okanye ubude bokuprinta obuphezulu. Iindlela zovavanyo ezingentla zixhomekeke kwi-subjectivity ephezulu, ukungaqhelekanga, kunye nenkqubo enzima. Indlela yovavanyo lokusebenza inamandla amakhulu kunye nexabiso ekusetyenzisweni kobunjineli.
Kule phepha, iidosi ezahlukeneyo ze-HPMC zafakwa kwizinto ezisekwe kwisamente ukuphucula ukuprintwa kwesamente, kwaye iziphumo zedosi ye-HPMC kwiimpawu zesamente yokuprinta ye-3D zavavanywa ngokupheleleyo ngokufunda ukuprintwa, iimpawu ze-rheological kunye neempawu zoomatshini. Ngokusekelwe kwiimpawu ezifana nokuchaneka Ngokusekelwe kwiziphumo zovavanyo, isamente exutywe nesixa esifanelekileyo se-HPMC yakhethwa ukuze kuqinisekiswe ukuprintwa, kwaye iiparameter ezifanelekileyo zento eprintiweyo zavavanywa; ngokusekwe kuphononongo lwemo ye-microscopic yesampuli, indlela yangaphakathi yokuguquka kokusebenza kwezinto zokuprinta yahlolwa. Kwangaxeshanye, kwasekwa izinto ezisekwe kwisamente yokuprinta ye-3D. Indlela ebanzi yokuvavanya ukusebenza okuprintwayo ukuze kukhuthazwe ukusetyenziswa kwetekhnoloji yokuprinta ye-3D kwicandelo lokwakha.
Ixesha lokuthumela: Sep-27-2022