Shin kun ji labarin MDF? Wasu mutane ba su da tabbacin menene shi ko yadda za su yi amfani da shi.

Matsakaici mai yawa fiberboard (MDF) samfurin itace ne da aka ƙera ta hanyar fasa katako ko ragowar itace mai laushi zuwa filayen itace, sau da yawa a cikin na'urar bushewa, haɗa shi da kakin zuma da abin ɗaure guduro, da ƙirƙirar fale-falen ta hanyar amfani da babban zafin jiki da matsa lamba. MDF gabaɗaya yana da yawa fiye da plywood. Ya ƙunshi zaruruwa daban-daban, amma ana iya amfani da shi azaman kayan gini mai kama da aikace-aikacen plywood. Ya fi karfi da yawa fiye da allon barbashi.

Akwai rashin fahimta da yawa game da allon MDF kuma galibi ana rikicewa tare da plywood da fiberboards. Allomar MDF gajarta ce don allo mai matsakaicin yawa. An yi la'akari da shi a matsayin maye gurbin itace kuma yana ɗaukar masana'antu a matsayin kayan aiki mai amfani don kayan ado da kayan gida.

Idan ba ku saba da itacen MDF ba, za mu ɗauke ku ta hanyar abin da yake, damuwa da itacen MDF, Yadda ake yin katako na MDF.

Kayan abu

An halicci MDF ta hanyar rushe katako da itace mai laushi a cikin filaye na itace, MDF yawanci an yi shi da 82% fiber na itace, 9% urea-formaldehyde resin manna, 8% ruwa da 1% paraffin kakin zuma. da yawa yawanci tsakanin 500 kg / m³(31 lb/ft³) da 1,000 kg/m³(62 lb/ft³). Yawan yawa da rarrabuwa kamarhaske,misali, kobabbaallo mai yawa kuskure ne kuma mai rudani. Girman allon, lokacin da aka kimanta dangane da yawan fiber da ke shiga cikin yin panel, yana da mahimmanci. MDF panel mai kauri a nauyin 700-720 kg/m³ana iya la'akari da babban yawa a cikin yanayin filayen fiberwood mai laushi, yayin da ba a la'akari da nau'in nau'in nau'in nau'in nau'in igiya mai wuyar gaske.

Fiber samar

Kayan albarkatun da ke yin wani yanki na MDF dole ne su bi ta wani tsari kafin su dace. Ana amfani da babban maganadisu don cire duk wani ƙazanta na maganadisu, kuma an raba kayan da girman. Daga nan sai a datse kayan a cire ruwa sannan a zuba a cikin injin tacewa, sai a yanyanka su kanana. Sa'an nan kuma ana ƙara resin don taimakawa haɗin fibers. Ana sanya wannan cakuda a cikin wani babban busar da ake dumama ta gas ko mai. Ana gudanar da wannan haɗin busassun ta hanyar damfarar drum sanye take da na'ura mai sarrafa kwamfuta don tabbatar da yawa da ƙarfi. Ana yanke sakamakon da aka samu zuwa girman daidai tare da kayan aikin masana'antu yayin da suke da dumi.

Ana sarrafa fibers a matsayin mutum ɗaya, amma cikakke, zaruruwa da tasoshin, ana kera su ta hanyar bushewa. Ana tattara guntuwar a cikin ƙananan matosai ta amfani da mai ba da dunƙulewa, a yi zafi na tsawon daƙiƙa 30-120 don tausasa lignin a cikin itacen, sannan a ciyar da su cikin na'urar bushewa. Na'urar defibrator na yau da kullun ya ƙunshi fayafai masu jujjuyawa guda biyu tare da tsagi a fuskokinsu. Ana ciyar da kwakwalwan kwamfuta a tsakiya kuma ana ciyar da su waje tsakanin fayafai ta hanyar centrifugal karfi. Rage girman ramuka a hankali yana raba zaruruwan, taimakon lignin mai laushi tsakanin su.

Daga defibrator, ɓangaren litattafan almara yana shiga cikin 'launi', wani yanki na musamman na tsarin MDF. Wannan bututun madauwari ne mai faɗaɗawa, da farko diamita 40 mm, yana ƙaruwa zuwa 1500 mm. Ana allurar kakin zuma a mataki na farko, wanda ke rufe zaruruwa kuma ana rarraba shi daidai da motsin motsi na fibers. Sannan ana allurar urea-formaldehyde resin a matsayin babban wakili na haɗin gwiwa. Kakin zuma yana inganta juriya da danshi kuma resin da farko yana taimakawa rage ƙumburi. Kayan yana bushewa da sauri a ɗakin faɗaɗa mai zafi na ƙarshe na layin busa kuma yana faɗaɗa zuwa lallausan fiber mai laushi da nauyi. Ana iya amfani da wannan fiber nan da nan, ko adana shi.

Shet kafa

Ana tsotse busasshen fiber a cikin saman 'pendistor', wanda a ko'ina ke rarraba fiber zuwa wani tabarma mai kama da ke ƙasa, yawanci kauri 230-610 mm. An riga an danne tabarmar kuma ko dai a aika kai tsaye zuwa ci gaba da dannawa mai zafi ko a yanka a cikin manyan zanen gado don latsa mai buɗewa da yawa. Latsa mai zafi yana kunna resin haɗin gwiwa kuma yana saita ƙarfi da bayanin martaba mai yawa. Zagayen zagayowar yana aiki a matakai, tare da kauri tabarmar da aka fara matsawa zuwa kusa da 1.5 × kauri da aka gama, sannan a kara matsawa cikin matakai kuma a riƙe na ɗan gajeren lokaci. Wannan yana ba da bayanin martabar hukumar tare da yankuna na ƙarar ƙima, don haka ƙarfin injina, kusa da fuskoki biyu na allon da ƙaramin ƙima.

Bayan dannawa, ana sanyaya MDF a cikin na'urar busar da tauraro ko sanyaya carousel, an gyara shi da yashi. A wasu aikace-aikace, allunan kuma ana lanƙwasa don ƙarin ƙarfi.

Tsarin samar da MDF