Ma ke aʻo ʻana i ka hopena o nā ʻano like ʻole o ka hydroxypropyl methylcellulose (HPMC) i ka paʻi ʻana, nā waiwai rheological a me nā waiwai mechanical o ka mīkini paʻi 3D, ua kūkākūkā ʻia ke ʻano kūpono o ka HPMC, a ua kālailai ʻia kona ʻano hana i hui pū ʻia me ka microscopic morphology. Hōʻike nā hopena i ka emi ʻana o ka wai o ka mortar me ka piʻi ʻana o ka maʻiʻo o ka HPMC, ʻo ia ka emi ʻana o ka extrudability me ka piʻi ʻana o ka maʻiʻo o HPMC, akā ʻoi aku ka maikaʻi o ka mālama ʻana i ka fluidity. Extrudability; ʻO ka nui o ka paʻa ʻana o ke ʻano a me ke kūpaʻa ʻana ma lalo o ke kaumaha ponoʻī e hoʻonui nui ʻia me ka hoʻonui ʻana o ka maʻiʻo HPMC, ʻo ia hoʻi, me ka piʻi ʻana o ka maʻiʻo HPMC, hoʻomaikaʻi ka stackability a hoʻolōʻihi ʻia ka manawa paʻi; mai ka manaʻo o ka rheology, me Me ka mahuahua o ka maʻiʻo o ka HPMC, ka viscosity ike, e hoʻoulu i stress a me ka plastic viscosity o ka slurry mahuahua nui, a me ka stackability maikaʻi; piʻi mua ka thixotropy a laila emi iho me ka hoʻonui ʻana o ka ʻike o ka HPMC, a ua hoʻomaikaʻi ka paʻi; ka maʻiʻo o ka HPMC i hoʻonui Kiʻekiʻe loa e hoʻonui i ka mortar porosity a me ka ikaika ʻAʻole pono ka ʻike o ka HPMC ma mua o 0.20%.
I nā makahiki i hala iho nei, ua hoʻomohala wikiwiki ka ʻenehana paʻi 3D (ʻike ʻia ʻo "additive manufacturing") a ua hoʻohana nui ʻia i nā kula he nui e like me ka bioengineering, aerospace, a me ka hana kiʻi. ʻO ke kaʻina hana ʻole o ka ʻenehana paʻi 3D ua hoʻomaikaʻi maikaʻi i nā mea a ʻO ka maʻalahi o ka hoʻolālā ʻana a me kāna ʻano hana automated ʻaʻole wale e hoʻopakele nui i ka manpower, akā kūpono hoʻi no nā hana kūkulu i nā ʻano ʻino. ʻO ka hui pū ʻana o ka ʻenehana paʻi 3D a me ke kahua kūkulu he mea hou a hoʻohiki. I kēia manawa, ʻo nā mea hana sima 3D ʻO ke kaʻina hana o ka paʻi ʻana, ʻo ia ke kaʻina extrusion stacking (me ka contour process contour crafting) a me ka paʻi paʻa a me ke kaʻina hana hoʻopaʻa pauda (D-shape process). Ma waena o lākou, ʻo ka extrusion stacking kaʻina i nā mea maikaʻi o ka liʻiliʻi liʻiliʻi mai ke kaʻina hana hoʻoheheʻe kuʻuna, hiki ke kiʻekiʻe o nā ʻāpana nui a me nā kumukūʻai kūkulu. Ua lilo ka maikaʻi haʻahaʻa i nā wahi wela no ka noiʻi ʻana o ka ʻenehana paʻi 3D o nā mea hana sima.
No ka sima-ma muli mea i hoʻohana 'ia e like me "inika mea" no ka 3D pai, ko lakou hana koi 'okoʻa mai ka maʻamau o ka sima-ma muli mea: ma kekahiʻaoʻao, aia kekahi mau koi no ka workability o ka hou hui 'ia me nā mea, a pono ke kaʻina hana e hoʻokō i nā koi o ka extrusion paheʻe, ma ka ʻaoʻao ʻē aʻe, pono e hoʻopaʻa ʻia ka extruded cement-based material, ʻo ia hoʻi, ʻaʻole ia e hāʻule a deform nui ma lalo o ka hana o kona kaumaha ponoʻī a me ka kaomi o ka papa luna. Eia kekahi,ʻo ka hana lamination o ka paʻi 3D e hana i nā papa ma waena o nā papa I mea e hōʻoia ai i nā mea mechanical maikaʻi o ka'āpana interlayer interface, pono e loaʻa i nā mea hale paʻi 3D ka pili pono. I ka hōʻuluʻulu ʻana, ua hoʻolālā ʻia ka hoʻolālā o ka extrudability, stackability, a me ka hoʻopili kiʻekiʻe i ka manawa like. ʻO nā mea i hoʻokumu ʻia i ka sima kekahi o nā mea e pono ai no ka hoʻohana ʻana i ka ʻenehana paʻi 3D ma ke kahua o ke kūkulu ʻana. ʻO ka hoʻoponopono ʻana i ke kaʻina hydration a me nā waiwai rheological o nā mea cementitious ʻelua ala nui e hoʻomaikaʻi ai i ka hana paʻi ma luna. Hoʻoponopono i ke kaʻina hana hydration o nā mea cementitious He paʻakikī ke hoʻokō, a maʻalahi hoʻi e hoʻopilikia i nā pilikia e like me ka paipu paipu; a ʻo ka hoʻoponopono ʻana i nā waiwai rheological pono e mālama i ka wai i ka wā o ka paʻi ʻana a me ka wikiwiki o ka hoʻonohonoho ʻana ma hope o ka hoʻoheheʻe ʻana i ka extrusion. mea e hoʻokō ai i ka hana paʻi ʻoi aku ka maikaʻi.
ʻO ka Hydroxypropyl methylcellulose (HPMC) kahi mānoanoa polymer maʻamau. Hiki ke hoʻohui ʻia nā paʻa hydroxyl a me ka ether ma ke kaulahao molekala me ka wai manuahi ma o nā paʻa hydrogen. ʻO ka hoʻokomo ʻana iā ia i loko o ke koneki hiki ke hoʻomaikaʻi maikaʻi i kona hui ʻana. a me ka mālama ʻana i ka wai. I kēia manawa, ʻo ka noiʻi e pili ana i ka hopena o ka HPMC ma nā waiwai o nā mea i hoʻopaʻa ʻia i ka sima ka nui o ka nānā ʻana i ka hopena o ka wai, ka paʻa ʻana o ka wai, a me ka rheology, a ua hana ʻia ka noiʻi liʻiliʻi ma nā waiwai o nā mea paʻi kiʻi 3D. e like me ka extrudability, stackability, etc.). Eia kekahi, ma muli o ka nele o nā kūlana like ʻole no ka paʻi 3D, ʻaʻole i hoʻokumu ʻia ke ʻano loiloi no ka paʻi ʻana o nā mea hana sima. ʻIke ʻia ka hiki ke hoʻopaʻa ʻia e ka helu o nā papa i hiki ke paʻi ʻia me ka deformation nui a i ʻole ke kiʻekiʻe o ka paʻi kiʻekiʻe. ʻO nā ʻano loiloi ma luna nei e pili ana i ke kumuhana kiʻekiʻe, ka honua maikaʻi ʻole, a me ka hana paʻakikī. Loaʻa i ke ʻano loiloi hana ka mana nui a me ka waiwai i ka noi ʻenehana.
Ma kēia pepa, ua hoʻokomo ʻia nā ʻano ʻokoʻa like ʻole o ka HPMC i loko o nā mea sima no ka hoʻomaikaʻi ʻana i ka hiki ke paʻi ʻia o ka palaki, a ua loiloi piha ʻia nā hopena o ka HPMC ma luna o nā waiwai paʻi paʻi 3D ma ke aʻo ʻana i ka hiki ke paʻi, nā waiwai rheological a me nā waiwai mechanical. Ma muli o nā waiwai e like me ka fluidity Ma muli o nā hopena loiloi, ua koho ʻia ka mortar i hui pū ʻia me ka nui o ka HPMC no ka paʻi ʻana i ka hōʻoia, a ua hoʻāʻo ʻia nā ʻāpana kūpono o ka mea i paʻi ʻia; ma muli o ke aʻo ʻana o ka microscopic morphology o ka hāpana, ua ʻimi ʻia ke ʻano o loko o ka hoʻomohala hana o ka mea paʻi. I ka manawa like, ua hoʻokumu ʻia ka mea paʻi kiʻi sima 3D. He ala loiloi piha o ka hana hiki ke paʻi ʻia i mea e paipai ai i ka hoʻohana ʻana i ka ʻenehana paʻi 3D ma ke kahua kūkulu.
Ka manawa hoʻouna: Sep-27-2022