Zama ezakhiweni zodaka lokuphrinta lwe-3D nge-hydroxypropyllylylyllose

1.1Ama-Raw material

Usimende wamukela i-P · ⅱ 52,5 usimende (i-PC) ekhiqizwa yi-Nanjiting Onotian Crement Plant, i-Hydroxypropyl Methylcellulose, i-awdroxypropyl, i-visaope ingu-65 0.10%, 0.20%, 0.30%, ngokulandelana; I-aggregate enhle iyisihlabathi se-quartz ngosayizi we-0.212 ~ 0.425 mm.

1.2Indlela yokuhlola

1.2.1Ukulungiselela ngokwezinto ezibonakalayo

Usebenzisa i-Mortar Mixer of Model JJ-5, okokuqala hlanganisa i-HPMC, usimende nesihlabathi ngokulinganayo, bese ufaka amanzi bese uxubana ngejubane eliphakeme), futhi ukuhlolwa kokusebenza kwenziwa ngokushesha ngemuva kokuxuba.

1.2.2Ukuhlolwa kokusebenza okuphrintiwe

Ukuphrintiswa kodaka ikakhulukazi kubonakala ngokungezwani nokuncibilika.

I-ExcuDemability enhle iyisisekelo sokuthola ukuphrinta kwe-3D, futhi udaka kudingeka ukuba bushelelezi futhi ungavimbi ipayipi ngesikhathi senqubo yokukhishwa. Izidingo zokulethwa. Kubhekiswa ku-GB / T 2419-2005 "" Ukunqunywa kuka-fluity ka usimende kasimende ", uketshezi lodaka olwalushiywe emile ngo-0, 20, 40, no-60 min wavivinywa ngokuphuma kwe-jumping etafuleni.

Ukuncipha okuhle kuyisihluthulelo sokwazi ukuphrinta kwe-3D. Kuyadingeka ukuthi ungqimba ophrintiwe ungawahlali noma ukhubazeke kakhulu ngaphansi kwesisindo sawo kanye nengcindezi yesendlalelo esingaphezulu. Izinga lokugcinwa kwesimo nokuphindwa kwe-penetation ngaphansi kwesisindo salo kungasetshenziswa ukuze kubonakaliswe uphawu oluphelele lodaka lokuphrinta lwe-3D.

Isilinganiso sokugcinwa kwesimo ngaphansi kwesisindo saso sibonisa izinga lokuchazwa kwezinto ezibonakalayo ngaphansi kwesisindo sazo, esingasetshenziswa ukuhlola ukunqunyelwa kwezinto zokuphrinta ze-3D. Izinga eliphakeme lokugcinwa kwesimo, elincane ukuguqulwa kodaka ngaphansi kwesisindo salo, esilungele ukuphrinta. Inkomba, faka udaka isikhungo esinqenqemeni nobubanzi obungu-100 mm, u-RAM bese udlidliza amahlandla ayi-10, bese uvala indawo yokuphakama ukuze uhlole ukuphakama kodaka, kanye nephesenti lawo ngokuphakama kwesimo sokugcinwa kwesimo. Indlela engenhla yayisetshenziselwa ukuvivinya izinga lokugcinwa kwesimo sodaka ngemuva kokuma ngo-0, 20, 40, kanye nemizuzu engama-60 ngokulandelana.

Ukuchitheka kodaka lokuphrinta lwe-3D kuhlobene ngqo nokusetha kanye nenqubo eqinile yezinto ezibonakalayo uqobo, ngakho-ke indlela yokulwa nokuqina kwe-peneteration isetshenziselwa ukuthola ukuthuthukiswa kokuqina noma izinto zokwakha ezisekelwe komoya wenqubo yokusetha, ukuze kuboniswe ngokungaqondile ukuncipha. Bheka indlela ye-JGJ 70 - 2009 "Indlela yokuhlola okuyisisekelo yokwakha udaka" ukuvivinya ukumelana nokungena kodaka.

Ngaphezu kwalokho, kusetshenziswe iphrinta yohlaka lwe-Gantry ukuveza nokuphrinta uhlaka lwekhiyubhu olulodwa olunobude obungama-200 mm, kanye nemingcele eyisisekelo yokuphrinta efana nenombolo yezingqimba zokuphrinta, nobubanzi obuseceleni obusezingeni eliphakeme bavivinywa. Ubukhulu obuhle bokuphrinta bungu-8 mm, futhi ijubane lokuphrinta le-1 500 mm / min.

1.2.3Ukuhlolwa Kwezakhiwo Ze-Rheological

Ipharamitha ye-Rheological iyipharamitha ebalulekile yokuhlola ukucacisa ukonakala kanye nokusebenza kwe-slurry, engasetshenziswa ukubikezela ukusebenza kwe-flow slurry ye-3D yokuphrinta usimende. I-Viscocity Ebonakalayo ikhombisa ukungqubuzana kwangaphakathi phakathi kwezinhlayiya eziseleni futhi kungahlola ukumelana kwe-slurry ekuhambeni kwezimo. Amandla we-HPMC ukukhombisa umphumela we-HPMC ekunciphiseni kodaka lokuphrinta lwe-3D. Bheka isilinganiso sokuxubana kuThebula 2 ukuze ulungiselele u-Cement Paste P-H0, P-H0.10, P-H0.20, P-H0.20, P-H0.30, sebenzisa i-Brookfield DVNext Viscometer nge-adaptha yayo. Izinga lokushisa lemvelo lokuhlola lingukuthi (20 ± 2 2) ° C. I-slurry emsulwa ihlukumezele ama-10 s ku-60.0 s-1 ukwenza ama-slurry asatshalaliswe ngokulinganayo, bese amise okwesikhashana ama-10 s, bese kumiswa okwesikhashana ku-6.1 s-1 bese kuncipha ku-0.1 s-1.

Imodeli ye-Bingham ekhonjiswe ku-EQ. (1) isetshenziselwa ukulingana kahle ne-shear stress-shear izinga lejika esiteji esizinzile (isilinganiso se-shear singu-10.0 ~ 50.0 S-1).

μ nod0 + μγ (1).

lapho kungukucindezela kwe-shear; Ingcindezi yesivuno; μ ukubonwa ngopulasitiki; γ isilinganiso se-shear.

Lapho izinto ezisuselwa kusonga zisesimweni se-static, i-visuosity yepulasitiki μ limelela izinga lobunzima bokwehluleka kohlelo lwe-colloidal, kanye nengcindezi yesivuno enesivuno kubhekisele ekucindezelekeni okuncane okudingekayo. Izinto ezibonakalayo zigeleza kuphela lapho ukucindezela kwe-shear ephakeme kune-ve0 yenzeka, ngakho-ke ingasetshenziswa ukukhombisa ithonya le-HPMC ekuchitheni kodaka lokuphrinta lwe-3D.

1.2.4Ukuhlolwa Kwezimpahla Zomshini

Ebhekisa indlela ye-GB / T 17671-1999 "yamandla kasimende", ama-motar hlobo anokuqukethwe okuhlukile kwe-HPMC alungiswa ngokuya ngesilinganiso sokuxubana kuThebula 2, futhi kwahlolwa amakhono awo aluhlaza okwesibhakabhaka.

Alikho indinganiso efanelekile yendlela yokuhlola yamandla eBonding phakathi kwezendlalelo zodaka lokuphrinta lwe-3D. Kulolu cwaningo, indlela ehlukanisayo yayisetshenziselwa ukuhlolwa. Isampula yodaka lokuphrinta lwe-3D lwelashwa ama-28 d, bese ligawula izingxenye ezi-3, igama elithi a, b, c ngokulandelana. , njengoba kukhonjisiwe kuMfanekiso 2 (a). Umshini wokuhlola we-CMT-4204 (ibanga le-20 kn, isigaba sokunemba 1, ukulayisha isilinganiso 0.08 mm / min) kusetshenziselwa ukulayisha umkhawulo we-interlayer ingxenye ezintathu ukuze uhlukanise ukuma kokwehluleka, njengoba kukhonjisiwe kuMfanekiso 2 (b).

I-Internaminar Bond Amandla we-PB ye-specimen ibalwa ngokuya ngefomula elandelayo:

Pb = 2Fe = 0.637 fa (2)

lapho i-f ukwehluleka umthwalo we-specimen; A indawo yendawo ehlukanisiwe ye-specimen.

1.2.5I-Micromorphology

I-microscopic morphology ye-specimens ku-3 d yagcinwa nge-Quanta 200 Skena ama-Electron Microscope (SEM) kusuka enkampanini ye-FEI, e-USA.