Ua lohe paha ʻoe i ka MDF? ʻAʻole maopopo i kekahi poʻe he aha ia a pehea e hoʻohana ai.
ʻO Medium-density fibreboard (MDF) kahi huahana lāʻau i hana ʻia ma ka wāwahi ʻana i nā koena lāʻau paʻakikī a i ʻole nā lāʻau palupalu i loko o nā fiber, pinepine i loko o kahi defibrator, e hui pū me ka wax a me ka mea hoʻopili resin, a me ka hana ʻana i nā panela me ka hoʻohana ʻana i ka wela kiʻekiʻe a me ke kaomi. ʻOi aku ka nui o ka MDF ma mua o ka plywood. Hana ʻia ia me nā pulu i hoʻokaʻawale ʻia, akā hiki ke hoʻohana ʻia ma ke ʻano he mea kūkulu hale e like me ka hoʻohana ʻana i ka plywood. ʻOi aku ka ikaika a ʻoi aku ka ʻoi aku o ka paʻa ma mua o ka papa particle.
Nui nā manaʻo kuhihewa e pili ana i nā papa MDF a ua huikau pinepine me ka plywood a me ka fiberboard. ʻO ka papa MDF he acronym no ka papa fiber density. Manaʻo ʻia ʻo ia he mea pani lāʻau a ke lawe nei i ka ʻoihana ma ke ʻano he mea pono no nā huahana hoʻonaninani a me nā lako hale.
Inā ʻaʻole ʻoe i kamaʻāina i ka lāʻau MDF, e alakaʻi mākou iā ʻoe i ke ʻano o ia mea, nā pilikia me ka lāʻau MDF, Pehea i hana ʻia ai nā papa MDF.
Mea waiwai
Ua hana ʻia ʻo MDF ma ka wāwahi ʻana i ka lāʻau paʻa a me ka lāʻau palupalu i loko o ka lāʻau, ʻo ka MDF ka mea maʻamau me 82% lāʻau fiber, 9% urea-formaldehyde resin glue, 8% wai a me 1% paraffin wax. a ʻo ka mānoanoa ma waena o 500 kg/m3(31 lb/ft3) a me 1,000 kg/m3(62 lb/ft3). ʻO ka laulā o ka density a me ka hoʻokaʻawale ʻana e like memāmā,maʻamau, a i ʻolekiʻekiʻeHe inoa kuhi hewa a huikau ka papa density. ʻO ka nui o ka papa, ke loiloiʻia e pili ana i ka nui o ka fiber e komo i ka hanaʻana i ka papa, he mea nui. ʻO kahi papa MDF mānoanoa ma kahi mānoanoa o 700–720 kg/m3hiki ke noʻonoʻo ʻia he ʻano kiʻekiʻe ma ke ʻano o nā paneli fiberwood, akā ʻaʻole i manaʻo ʻia ka ʻāpana like i hana ʻia me nā fiber lāʻau paʻakikī.
Hana ʻana i ka fiber
Pono nā mea maka e hana i kahi ʻāpana MDF ma mua o ke kūpono. Hoʻohana ʻia kahi magnet nui e wehe i nā haumia magnetic, a hoʻokaʻawale ʻia nā mea e ka nui. Hoʻopili ʻia nā mea hana e wehe i ka wai a laila hānai ʻia i loko o kahi mea hoʻomaʻemaʻe, kahi e ʻoki ai iā lākou i ʻāpana liʻiliʻi. Hoʻohui ʻia ka resin e kōkua i ka hoʻopaʻa ʻana o nā fibers. Hoʻokomo ʻia kēia hui ʻana i loko o kahi mea maloʻo nui loa i hoʻomehana ʻia e ke kinoea a i ʻole ka aila. Hoʻopili ʻia kēia hui maloʻo ma o ka pahu compressor i hoʻolako ʻia me nā mana kamepiula e hōʻoiaʻiʻo i ka paʻa pono a me ka ikaika. A laila ʻokiʻoki ʻia nā ʻāpana i ka nui kūpono me kahi ʻili ʻoihana ʻoiai lākou e mahana.
Hoʻopili ʻia nā fiber ma ke ʻano he kanaka, akā paʻa, nā fibers a me nā moku, i hana ʻia ma o kahi kaʻina maloʻo. Hoʻopili ʻia nā ʻāpana i loko o nā puʻupuʻu liʻiliʻi me ka hoʻohana ʻana i kahi mea hoʻoheheʻe, hoʻomehana ʻia no 30-120 kekona e hoʻomaʻamaʻa i ka lignin i ka lāʻau, a laila hānai ʻia i kahi defibrator. Loaʻa i kahi defibrator maʻamau ʻelua disiki kūʻē i ka huli ʻana me nā ʻāwī ma ko lākou mau maka. Hāʻawi ʻia nā chips i ke kikowaena a hānai ʻia i waho ma waena o nā disc e ka ikaika centrifugal. ʻO ka emi ʻana o ka nui o nā ʻāwīwī e hoʻokaʻawale liʻiliʻi i nā fiber, i kōkua ʻia e ka lignin palupalu ma waena o lākou.
Mai ka defibrator, komo ka pulp i kahi 'blowline', kahi ʻāpana kūʻokoʻa o ke kaʻina MDF. He pipeline pōʻai pōʻai kēia, ma mua he 40 mm ke anawaena, e piʻi ana i 1500 mm. Hoʻokomo ʻia ka wax i ka pae mua, kahi e uhi ai i nā ʻili a puʻunaue like ʻia e ka neʻe ʻana o ka ʻili. Hoʻokomo ʻia ka resin urea-formaldehyde ma ke ʻano he mea hoʻopaʻa nui. Hoʻomaikaʻi ka wax i ka pale ʻana i ka makū a kōkua mua ka resin i ka hōʻemi ʻana i ka clumping. Hoʻomaloʻo koke ka mea i loko o ke keʻena hoʻonui wela hope loa o ka blowline a hoʻonui i ka fiber maikaʻi, fluffy a māmā. Hiki ke hoʻohana koke ʻia kēia fiber, a mālama ʻia paha.
Ka hana ʻana i ka lau
ʻOmo ʻia ka pulupulu maloʻo i ka piko o ka 'pendistor', ka mea e puunaue like i ka fiber i loko o ka moena ʻaʻahu ma lalo iho, ʻo ka maʻamau he 230–610 mm ka mānoanoa. Hoʻopili mua ʻia ka moena a hoʻouna pololei ʻia i kahi paʻi wela hoʻomau a ʻokiʻoki ʻia i loko o nā ʻāpana nui no kahi paʻi wela nui. Hoʻoikaika ka paʻi wela i ka resin hoʻopaʻa ʻana a hoʻonohonoho i ka ʻike ikaika a me ka paʻa. Ke holo nei ka pōʻaiapili kaomi ma nā ʻanuʻu, me ka mānoanoa o ka moena e hoʻopili mua ʻia ma kahi o 1.5x ka mānoanoa o ka papa i hoʻopau ʻia, a laila kaomi hou i nā pae a paʻa no kahi manawa pōkole. Hāʻawi kēia i kahi ʻaoʻao papa me nā ʻāpana i hoʻonui ʻia, no laila ka ikaika mechanical, kokoke i nā ʻaoʻao ʻelua o ka papa a me kahi kumu liʻiliʻi liʻiliʻi.
Ma hope o ke kaomi ʻana, hoʻoluʻu ʻia ʻo MDF i loko o kahi mea maloʻo hōkū a i ʻole carousel hoʻoluʻu, ʻoki ʻia a hoʻopaʻa ʻia. I kekahi mau noi, ua laminated ʻia nā papa no ka ikaika hou aku.
Kaʻina hana MDF
Any questions please feel free to ask me through Andrew@sinotxj.com
Ka manawa hoʻouna: Iune-22-2022