Zofunikira zamtundu wa fiberboard pakupanga ma fiberboard nthawi zambiri zimatsimikiziridwa malinga ndi gulu lazogulitsa, njira zopangira komanso momwe zida ziliri.Ponena za ubwino wa CHIKWANGWANI, ulusi wolekanitsidwawo umayenera kukhala ndi malo enaake enieni komanso zinthu zabwino zolukanalukana, ndipo zimafunikira chiŵerengero cha chiŵerengero, mtengo wa sieve, ndi madzi a fiber, mpweya wodutsa, zigawo za mankhwala, ndi polymerization ya fiber.Pali zofunika kwambiri.Monga kupanga konyowa, popanga slab ndi kukanikiza kotentha, fiber slab imafunika kuti ikhale ndi ntchito yochotsa madzi m'thupi mwachangu komanso mosavuta.Kupanga kowuma kumafunikira osati kulumikiza bwino kwa ulusi, komanso mpweya wabwino wa slab.Kupanda kutero, ma slabs opangidwa a njira ziwiri zopangira adzawononga kapangidwe ka ma slabs ndikukhudza momwe zinthu ziliri pamayendedwe komanso kukanikiza kotentha.Komabe, popanga kachulukidwe kakang'ono kapena kofewa, ulusi sungathe kukanikizidwa kapena kukanikizidwa pang'ono kuti uume mu bolodi pambuyo popanga slab.Kuchuluka kwa tsache kumawonjezera malo olumikizirana ndi kulumikizana pakati pa ulusi womwewo.
(1) Ubale pakati pa fiber morphology ndi mtundu wazinthu
Ponena za mawonekedwe achilengedwe a fiber, pali kusiyana kwakukulu pakati pa zida zosiyanasiyana.Mwachitsanzo, pafupifupi kutalika kwa fiber tracheids ya mtengo wa coniferous ndi 2-3 mm, ndipo chiŵerengero cha 63-110;pafupifupi kutalika kwa ulusi wa tracheids ndi ulusi wolimba wa matabwa a matabwa otakata ndi 0.8-1.3 mm, ndi chiŵerengero cha 35-110 58;ponena za zipangizo za udzu wa udzu, kutalika kwa fiber tracheids ndi 0.8-2.2 mm, chiwerengero ndi 30-130, ndipo zomwe zili m'maselo omwe si a fiber ndizokwera kwambiri.
Malinga ndi kutalika kwa fiberboard ndi mawonekedwe ake, zikuwoneka kuti fiberboard yopangidwa ndi ulusi wa softwood ndi yabwinoko.Komabe, zatsimikiziridwa kuti magwiridwe antchito a fiberboard omwe amapanikizidwa ndi zida zonse za coniferous sizofunikira.Izi ndichifukwa choti makulidwe a fiber tracheids ya zinthu za coniferous ndi tubular, ndipo makulidwe a khoma la cell ndiakuluakulu kuposa m'lifupi mwa ulusi.Malo onse okhudzidwa amakhala ochepa.M'malo mwake, ulusi wa ulusi, ulusi wolimba wa matabwa, ndi ngalande za matabwa a masamba otakata ndi opyapyala komanso opangidwa ndi bandeji, kotero kuti malo olumikizana pakati pa ulusi ndi wamkulu, ndipo katundu wolukana ndi wabwino.Chopangidwa ndi fiberboard chokhala ndi kachulukidwe kwambiri komanso mphamvu.
Mphamvu yachilengedwe ya ulusi womwewo umakhalanso ndi chikoka pamphamvu ya chinthu cha fiberboard.Winawake adagwiritsapo ntchito njira yopaka utoto kuti adutse mayeso opindika ndi kulephera kwa hard fiberboard, ndikuwonera pansi pa maikulosikopu, zidawoneka kuti 60% mpaka 70% ya ulusi umodzi wawonongeka.Kuchokera kumapeto kwa mayesowo, akukhulupirira kuti mphamvu yachilengedwe ya ulusi wa monomer palokha ilibe mphamvu pamphamvu ya bolodi yofewa yokhala ndi kachulukidwe ka 0.25-0.4g/cm3.Zimakhala ndi zotsatira zoonekeratu pa mphamvu ya sing'anga kachulukidwe fiberboard ndi kachulukidwe wa 0.4-0.8g/cm3.Zidzakhudza kwambiri mphamvu ya ma fiberboards apamwamba kwambiri okhala ndi kachulukidwe kakang'ono kuposa 0.9g/cm3.Izi zili choncho chifukwa mphamvu yachibadwidwe cha ulusi umodzi wokha imagwirizana ndi kutalika kwa unyolo wa cellulose (ndiko kuti, digiri ya polymerization), ndipo kutalika kwa ulusi umodzi kumatha kufika 40000Pm.Ulusiwo utatha kupangidwa ndi kupangidwa kukhala ma slabs, dongosolo losakhazikika limakhala lomwazika komanso losakhazikika.Pambuyo pochotsa chikoka cha zinthu zina, poganiza kuti kutalika kwapakati pa ulusi umodzi ndi 20 000 Pm, ndiyeno kuwerengedwa molingana ndi chiwerengero cha 40%, fiber imodzi Kutalika kwa fracture kumatha kufika 8 000 Pm.Zitha kuwoneka kuti ubale pakati pa mphamvu yachilengedwe ya ulusi womwewo ndi mphamvu ya chinthu cha fiberboard.
(2) Ubale pakati pa kuchuluka kwa kulekana kwa ulusi ndi mtundu wa fiberboard
Mlingo wa kupatukana kwa ulusi umatanthawuza kuchuluka kwa ulusi wolekanitsa pambuyo pa defibration, yomwe ndi mbali yomwe imawonetsa mosadziwika bwino za ulusi.M'mene ulusi umasiyanitsa bwino kwambiri, m'pamenenso ulusiwo umakhala wokulirapo, ndipo m'pamenenso madzi amathiramo madzi komanso mpweya wake umakhala wochepa kwambiri.Mosiyana ndi zimenezo, kusefedwa kwamadzi ndi mpweya wabwino wa ulusi, koma ulusi panthawiyi nthawi zambiri umakhala wochuluka komanso malo enieni a ulusiwo amakhala ochepa.Pambuyo pa kupatukana kwa ulusi, malo enieni a ulusiwo amakhala mosagwirizana ndi ngalande yamadzi.Kukula kwa malo enieniwo kumakhala kokulirapo, ulusi wabwino kwambiri umakhala wabwino kwambiri, ndipo m'pamenenso madzi amachulukira kwambiri.Digiri yoyipa yolekanitsa CHIKWANGWANI Coarse fiber (28 ~ 48 mesh) imakhala ndi kukana kwa mpweya pang'ono, pomwe digiri yapamwamba yolekanitsa ulusi ndi ulusi wabwino zimakhala ndi malo akuluakulu (100 ~ 200 mesh), mpweya wosakwanira wa ulusi, kudzaza bwino kwa slab, koma mpweya wawukulu. kukaniza.Kukula kwakukulu kwapamwamba kwa ulusi, kumachepetsa kuchuluka kwa ulusi, ndi mosemphanitsa.Choncho tinganene kuti kusefa, mpweya permeability ndi voliyumu wa CHIKWANGWANI zonse zili ndi ubale wina ndi mlingo kulekana kwa CHIKWANGWANI.Chifukwa chake, titha kunena kuti kuchuluka kwa kupatukana kwa CHIKWANGWANI ndi chizindikiro chofunikira chamtundu wa fiber zamkati, zomwe zimakhudza mwachindunji njira yopanga ulusi komanso mtundu wazinthu.Zochita zatsimikiziranso kuti mkati mwamtundu wina, kuchuluka kwa kuchuluka kwa ulusi wolekanitsa, ndiko kuti, ulusi wabwino kwambiri, kuluka bwino pakati pa ulusi wa slab, ndi mphamvu, kukana madzi ndi kachulukidwe kazinthu za fiberboard. onjezeraninso motero.
Kuphatikiza apo, zimatsirizidwa kuchokera kuzochitika zenizeni kuti kuchuluka kwa kulekanitsa kwa fiber kuyenera kuyendetsedwa mkati mwamtundu wina potengera kukhazikika kwamtundu wazinthu malinga ndi mitundu yosiyanasiyana yazinthu ndi machitidwe opangira.
(3) Ubale pakati pa mtengo wowunikira ulusi ndi mtundu wa fiberboard
Maonekedwe a ulusi, kutalika kwa ulusi, ndi makulidwe a ulusi wamitundu yosiyanasiyana ya zida zopangira ulusi adzakhala ndi magawo osiyanasiyana pamtundu wa fiberboard.Njira yoyezera ulusi wa ulusi nthawi zambiri ndi kugwiritsa ntchito kupatukana kwa ulusi (fiber freeness DS ndi digiri ya fiber percussion SR).Chifukwa chakuti ulusi womwewo ndi wosiyana kwambiri, nthawi zambiri zimakhala zovuta kusonyeza chiyambi cha khalidwe la ulusi poyeza mlingo wa kulekana kwa ulusi wokha.Nthawi zina ulusi wa ulusiwo umakhala wofanana, koma kutalika ndi makulidwe a ulusiwo ndi wosiyana.Chifukwa chake, amawonjezeredwa ndikuyesa mtengo wa sieving wa fiber kuti awunike mtundu wa ulusi wolekanitsidwa.
Mtengo wowunikira ulusi ndi wofunikira kwambiri pakupanga kwenikweni.Kusintha mawonekedwe a fiber slurry screening kumatha kupititsa patsogolo mawonekedwe a ulusi komanso mawonekedwe a slurry, potero kumapangitsa kuti zinthu za fiberboard zizikhala bwino.Kafukufuku wokhudza kuwunika kwa fiberboard pamtundu wa fiberboard wakhala akuyang'aniridwa kwanthawi yayitali, ndipo ukadaulo wokhazikika wapezeka.Fiber morphology imakhudzidwa makamaka ndi mtundu wa zinthu komanso njira yolekanitsa ulusi.Mtengo wa coniferous ndi wabwino kuposa ulusi wamatabwa wa masamba otakata.Njira yamakina opangira mankhwala ndi yabwino kuposa njira yowotchera (ndiko kuti, njira yopangira mafuta), ndipo njira yoyera yamakina ndiyothandiza kwambiri.osauka.
Dongguan MUMUMalingaliro a kampani Woodworking Co., Ltd.ndi wopanga zida zomangira zaku China zomwe zimamva mawu komanso ogulitsa.ChondeLumikizanani nafekuti mudziwe zambiri!
Nthawi yotumiza: Jul-22-2023
