Uke wezwa nge-MDF? Abanye abantu abaqiniseki ukuthi iyini noma isetshenziswa kanjani.

I-Medium-density fibreboard (MDF) iwumkhiqizo wokhuni owenziwe ngobunjiniyela owenziwe ngokuhlephula izinsalela zokhuni oluqinile noma ezithambile zibe imicu yokhuni, ngokuvamile ku-defibrator, ukuyihlanganisa ne-wax ne-resin binder, nokwenza amaphaneli ngokufaka izinga lokushisa eliphezulu nokucindezela. I-MDF ngokuvamile iminyene kune-plywood. Yenziwe ngemicu ehlukanisiwe, kodwa ingasetshenziswa njengempahla yokwakha efana nokusetshenziswa kweplywood. Inamandla futhi iminyene kakhulu kunebhodi lezinhlayiyana.

Kunemibono eminingana eyiphutha mayelana namabhodi e-MDF futhi avame ukudideka ne-plywood nama-fibreboards. Ibhodi le-MDF liyisifinyezo se-medium density fibreboard. Ibhekwa kakhulu esikhundleni sokhuni futhi ithatha imboni njengento ewusizo yemikhiqizo yokuhlobisa kanye nefenisha yasekhaya.

Uma ungajwayele ukhuni lwe-MDF, sizokuthatha ukuthi luyini, ukukhathazeka ngokhuni lwe-MDF, Amabhodi e-MDF enziwa kanjani.

Okubalulekile

I-MDF yadalwa ngokuhlephula kokubili ukhuni oluqinile kanye nokhuni oluthambile lube imicu yokhuni, i-MDF ngokuvamile yenziwe nge-wood fiber engu-82%, iglue ye-urea-formaldehyde resin engu-9%, amanzi angu-8% kanye ne-wax kapharafini engu-1%. futhi ukuminyana ngokuvamile kuphakathi kwama-500 kg/m³(31 lb/ft³) kanye ne-1,000 kg/m³(62 lb/ft³). Ububanzi bokuminyana nokuhlukaniswa njengeukukhanya,ejwayelekile, nomaphezuludensity board iyigama elingelona iqiniso futhi liyadida. Ukuminyana kwebhodi, lapho kuhlolwa maqondana nokuminyana kwefiber engena ekwenzeni iphaneli, kubalulekile. Iphaneli ye-MDF ewugqinsi ekumineni okungama-700-720 kg/m³kungase kubhekwe njengokuminyana okuphezulu endabeni yamaphaneli e-softwood fiber, kuyilapho iphaneli yokuminyana okufanayo eyenziwe ngemicu yokhuni oluqinile ayibhekwa kanjalo.

Ukukhiqizwa kwe-fiber

Izinto ezingavuthiwe ezenza ucezu lwe-MDF kufanele zidlule kunqubo ethile ngaphambi kokuba zifaneleke. Uzibuthe omkhulu usetshenziselwa ukususa noma yikuphi ukungcola kazibuthe, futhi izinto ezisetshenziswayo zihlukaniswa ngosayizi. Izinto ezisetshenziswayo zibe sezicindezelwa ukuze kukhishwe amanzi bese zifakwa kumshini wokuwacwenga, owahlukanise abe izingcezu ezincane. I-resin ibe isifakwa ukuze isize isibopho semicu. Le ngxube ifakwa endaweni yokomisa enkulu kakhulu eshisisa ngegesi noma ngamafutha. Le nhlanganisela eyomile iqhutshwa nge-compressor yesigubhu efakwe izilawuli zekhompyutha ukuze kuqinisekiswe ukuminyana namandla okufanele. Izingcezu ezivelayo zibe sezisikwa zibe usayizi ofanele ngesaha lezimboni ngesikhathi zisafudumele.

Imicu icutshungulwa njengomuntu ngamunye, kodwa ingaguquki, imicu kanye nemikhumbi, ekhiqizwa ngenqubo eyomile. Ama-chips abe esehlanganiswa abe amapulaki amancane kusetshenziswa i-screw feeder, eshisiswe imizuzwana engu-30-120 ukuze athambise i-lignin okhunini, bese efakwa emshinini wokuqeda amandla. I-defibrator ejwayelekile ihlanganisa amadiski amabili aphikisayo anemifantu ebusweni bawo. Ama-chips afakwa phakathi nendawo futhi anikezwa ngaphandle phakathi kwama-discs ngamandla e-centrifugal. Ukuncipha kobukhulu bemigodi kancane kancane kuhlukanisa izintambo, zisizwa i-lignin ethambile phakathi kwazo.

Kusukela ku-defibrator, i-pulp ingena 'kumugqa wokuvuthela', ingxenye ehlukile yenqubo ye-MDF. Leli ipayipi eliyindilinga elikhulayo, ekuqaleni libe ngu-40 mm ububanzi, likhuphuka libe ngu-1500 mm. I-wax ijovwa esigabeni sokuqala, esimboza imicu futhi isatshalaliswa ngokulinganayo ukunyakaza okunyakazayo kwemicu. I-urea-formaldehyde resin ibe isijovwa njenge-ejenti ebophayo. I-wax ithuthukisa ukumelana nomswakama futhi i-resin ekuqaleni isiza ukunciphisa ukugoqa. Izinto zoma ngokushesha egunjini lokugcina elishisayo lokunweba le-blowline futhi inwebeke ibe ifayibha ecolekile, ethambile futhi engasindi. Le fibre ingasetshenziswa ngokushesha, noma igcinwe.

Ukwakhiwa kweshidi

Ifayibha eyomile imuncwa phezulu 'kwe-pendistor', esabalalisa ifayibha ngokulinganayo kumata afanayo ngaphansi kwayo, ngokuvamile ogqinsi luka-230–610 mm. Umata ucindezelwa ngaphambili futhi uthunyelwa ngqo emshinini wokunyathelisa oshisayo oqhubekayo noma usikwe ube amashidi amakhulu ukuze umshini wokunyathelisa oshisayo ovula kaningi. Ukucindezela okushisayo kwenza kusebenze i-bonding resin futhi usethe amandla kanye nephrofayili yokuminyana. Umjikelezo wokucindezela usebenza ngezigaba, lapho ubukhulu be-mata bucindezelwa kuqala bufinyelele ku-1.5× ubukhulu bebhodi eliqediwe, bese bucindezelwa ngokuqhubekayo ngezigaba futhi bubanjwe isikhathi esifushane. Lokhu kunikeza iphrofayili yebhodi enezindawo zokuminyana okwengeziwe, ngaleyo ndlela amandla emishini, eduze kobuso obubili bebhodi kanye nomongo ominyene kancane.

Ngemuva kokucindezela, i-MDF ipholiswe endaweni yokomisa inkanyezi noma i-carousel yokupholisa, inqunywe futhi ifakwe isihlabathi. Kwezinye izinhlelo zokusebenza, amabhodi abuye afakwe laminated ukuze athole amandla engeziwe.

Inqubo yokukhiqiza ye-MDF