Ua lohe paha ?oe i ka MDF? ?A?ole maopopo i kekahi po?e he aha ia a pehea e ho?ohana ai.
?O Medium-density fibreboard (MDF) kahi huahana lā?au i hana ?ia ma ka wāwahi ?ana i nā koena lā?au pa?akikī a i ?ole nā ????lā?au palupalu i loko o nā fiber, pinepine i loko o kahi defibrator, e hui pū me ka wax a me ka mea ho?opili resin, a me ka hana ?ana i nā panela me ka ho?ohana ?ana i ka wela ki?eki?e a me ke kaomi. ?Oi aku ka nui o ka MDF ma mua o ka plywood. Hana ?ia ia me nā pulu i ho?oka?awale ?ia, akā hiki ke ho?ohana ?ia ma ke ?ano he mea kūkulu hale e like me ka ho?ohana ?ana i ka plywood. ?Oi aku ka ikaika a ?oi aku ka ?oi aku o ka pa?a ma mua o ka papa particle.
Nui nā mana?o kuhihewa e pili ana i nā papa MDF a ua huikau pinepine me ka plywood a me ka fiberboard. ?O ka papa MDF he acronym no ka papa fiber density. Mana?o ?ia ?o ia he mea pani lā?au a ke lawe nei i ka ?oihana ma ke ?ano he mea pono no nā huahana ho?onaninani a me nā lako hale.
Inā ?a?ole ?oe i kama?āina i ka lā?au MDF, e alaka?i mākou iā ?oe i ke ?ano o ia mea, nā pilikia me ka lā?au MDF, Pehea i hana ?ia ai nā papa MDF.
Mea waiwai
Ua hana ?ia ?o MDF ma ka wāwahi ?ana i ka lā?au pa?a a me ka lā?au palupalu i loko o ka lā?au, ?o ka MDF ka mea ma?amau me 82% lā?au fiber, 9% urea-formaldehyde resin glue, 8% wai a me 1% paraffin wax. a ?o ka mānoanoa ma waena o 500 kg/m3(31 lb/ft3) a me 1,000 kg/m3(62 lb/ft3). ?O ka laulā o ka density a me ka ho?oka?awale ?ana e like memāmā,ma?amau, a i ?oleki?eki?eHe inoa kuhi hewa a huikau ka papa density. ?O ka nui o ka papa, ke loiloi?ia e pili ana i ka nui o ka fiber e komo i ka hana?ana i ka papa, he mea nui. ?O kahi papa MDF mānoanoa ma kahi mānoanoa o 700–720 kg/m3hiki ke no?ono?o ?ia he ?ano ki?eki?e ma ke ?ano o nā paneli fiberwood, akā ?a?ole i mana?o ?ia ka ?āpana like i hana ?ia me nā fiber lā?au pa?akikī.
Hana ?ana i ka fiber
Pono nā mea maka e hana i kahi ?āpana MDF ma mua o ke kūpono. Ho?ohana ?ia kahi magnet nui e wehe i nā haumia magnetic, a ho?oka?awale ?ia nā mea e ka nui. Ho?opili ?ia nā mea hana e wehe i ka wai a laila hānai ?ia i loko o kahi mea ho?oma?ema?e, kahi e ?oki ai iā lākou i ?āpana li?ili?i. Ho?ohui ?ia ka resin e kōkua i ka ho?opa?a ?ana o nā fibers. Ho?okomo ?ia kēia hui ?ana i loko o kahi mea malo?o nui loa i ho?omehana ?ia e ke kinoea a i ?ole ka aila. Ho?opili ?ia kēia hui malo?o ma o ka pahu compressor i ho?olako ?ia me nā mana kamepiula e hō?oia?i?o i ka pa?a pono a me ka ikaika. A laila ?oki?oki ?ia nā ?āpana i ka nui kūpono me kahi ?ili ?oihana ?oiai lākou e mahana.
Ho?opili ?ia nā fiber ma ke ?ano he kanaka, akā pa?a, nā fibers a me nā moku, i hana ?ia ma o kahi ka?ina malo?o. Ho?opili ?ia nā ?āpana i loko o nā pu?upu?u li?ili?i me ka ho?ohana ?ana i kahi mea ho?ohehe?e, ho?omehana ?ia no 30-120 kekona e ho?oma?ama?a i ka lignin i ka lā?au, a laila hānai ?ia i kahi defibrator. Loa?a i kahi defibrator ma?amau ?elua disiki kū?ē i ka huli ?ana me nā ?āwī ma ko lākou mau maka. Hā?awi ?ia nā chips i ke kikowaena a hānai ?ia i waho ma waena o nā disc e ka ikaika centrifugal. ?O ka emi ?ana o ka nui o nā ?āwīwī e ho?oka?awale li?ili?i i nā fiber, i kōkua ?ia e ka lignin palupalu ma waena o lākou.
Mai ka defibrator, komo ka pulp i kahi 'blowline', kahi ?āpana kū?oko?a o ke ka?ina MDF. He pipeline pō?ai pō?ai kēia, ma mua he 40 mm ke anawaena, e pi?i ana i 1500 mm. Ho?okomo ?ia ka wax i ka pae mua, kahi e uhi ai i nā ?ili a pu?unaue like ?ia e ka ne?e ?ana o ka ?ili. Ho?okomo ?ia ka resin urea-formaldehyde ma ke ?ano he mea ho?opa?a nui. Ho?omaika?i ka wax i ka pale ?ana i ka makū a kōkua mua ka resin i ka hō?emi ?ana i ka clumping. Ho?omalo?o koke ka mea i loko o ke ke?ena ho?onui wela hope loa o ka blowline a ho?onui i ka fiber maika?i, fluffy a māmā. Hiki ke ho?ohana koke ?ia kēia fiber, a mālama ?ia paha.
Ka hana ?ana i ka lau
?Omo ?ia ka pulupulu malo?o i ka piko o ka 'pendistor', ka mea e puunaue like i ka fiber i loko o ka moena ?a?ahu ma lalo iho, ?o ka ma?amau he 230–610 mm ka mānoanoa. Ho?opili mua ?ia ka moena a ho?ouna pololei ?ia i kahi pa?i wela ho?omau a ?oki?oki ?ia i loko o nā ?āpana nui no kahi pa?i wela nui. Ho?oikaika ka pa?i wela i ka resin ho?opa?a ?ana a ho?onohonoho i ka ?ike ikaika a me ka pa?a. Ke holo nei ka pō?aiapili kaomi ma nā ?anu?u, me ka mānoanoa o ka moena e ho?opili mua ?ia ma kahi o 1.5x ka mānoanoa o ka papa i ho?opau ?ia, a laila kaomi hou i nā pae a pa?a no kahi manawa pōkole. Hā?awi kēia i kahi ?ao?ao papa me nā ?āpana i ho?onui ?ia, no laila ka ikaika mechanical, kokoke i nā ?ao?ao ?elua o ka papa a me kahi kumu li?ili?i li?ili?i.
Ma hope o ke kaomi ?ana, ho?olu?u ?ia ?o MDF i loko o kahi mea malo?o hōkū a i ?ole carousel ho?olu?u, ?oki ?ia a ho?opa?a ?ia. I kekahi mau noi, ua laminated ?ia nā papa no ka ikaika hou aku.
Ka?ina hana MDF
Any questions please feel free to ask me through Andrew@sinotxj.com
Ka manawa ho?ouna: Iune-22-2022