Wakambonzwa nezve MDF? Vamwe vanhu havazivi kuti chii kana kuti chinoshandiswa sei.
Medium-density fibreboard (MDF) chigadzirwa chehuni chakagadzirwa kuburikidza nekupwanya matanda akaoma kana kuti softwood residuals kuita matanda ehuni, kazhinji mudefibrator, achiisanganisa nenamo uye resin binder, uye kugadzira mapanera nekuisa tembiricha yakakwira nekumanikidza. MDF kazhinji yakaoma kupfuura plywood. Inoumbwa netambo dzakaparadzaniswa, asi inogona kushandiswa sechinhu chekuvaka chakafanana mukushandiswa kune plywood. Iyo yakasimba uye yakanyanya kusimba kupfuura particle board.
Pane zvakawanda zvisirizvo nezve MDF mabhodhi uye anowanzo kuvhiringika neplywood uye fibreboards. MDF board ichidimbu chepakati density fibreboard. Inonyanya kuonekwa sechinhu chinotsiva huni uye iri kutora indasitiri sechinhu chinobatsira chezvigadzirwa zvekushongedza pamwe nemidziyo yemumba.
Kana iwe usingazivi nezveMDF huni, tichakutora iwe kuburikidza nezviri, zvinonetsa neMDF huni, MDF mabhodhi anogadzirwa sei.
Material
MDF yakagadzirwa nekupwanya matanda akaomarara uye matanda manyoro kuita shinda dzehuni, MDF inowanzogadzirwa ne82% yehuni fiber, 9% urea-formaldehyde resin glue, 8% mvura uye 1% parafini wakisi. uye density inowanzova pakati pe500 kg/m3(31 lb/ft3) uye 1,000 kg/m3(62 lb/ft3) The range of density uye classification aschiedza,standard, kanahighdensity board inyaya isiriyo uye inovhiringa. Iyo density yebhodhi, kana ichiongororwa maererano nehuwandu hwefiber inoenda mukugadzira pani, yakakosha. A gobvu MDF panel pane density 700-720 kg/m3inogona kutaridzirwa sehupamhi hwepamusoro munyaya ye softwood fiber panels, asi pani yehuwandu hwakafanana hwakagadzirwa nehuni hwakaoma husingaonekwi saizvozvo.
Kugadzirwa kwefiber
Izvo zvigadzirwa zvinogadzira chidimbu cheMDF zvinofanirwa kupfuura neimwe nzira isati yave yakakodzera. Magineti makuru anoshandiswa kubvisa chero tsvina yemagineti, uye zvinhu zvinopatsanurwa nehukuru. Midziyo yacho inotsikirirwa kuti ibvise mvura yobva yaiswa muchinatsa, icho chinodimbura kuita zvidimbu zvidiki. Resin inobva yawedzerwa kubatsira mafibers chisungo. Musanganiswa uyu unoiswa muomesi hombe kwazvo unodziiswa negasi kana mafuta. Musanganiswa wakaoma uyu unofambiswa nedhiramu compressor yakashongedzerwa nemakomputa ekudzora kuti ive nechokwadi chekuwanda uye simba. Zvidimbu zvinenge zvabuda zvinochekwa kusvika pakukura chaiko nesaha yeindasitiri zvichiri kudziya.
Fibers inogadziriswa semunhu, asi yakasimba, fiber uye midziyo, inogadzirwa kuburikidza nekuoma. Machipisi anozopetwa kuita maplugs madiki achishandisa screw feeder, inopisa kwemasekonzi 30-120 kupfavisa lignin muhuni, yobva yaiswa mudefibrator. Iyo yakajairwa defibrator inoumbwa maviri anopokana-anotenderera disc ane grooves muzviso zvawo. Chips anodyiswa mukati uye anodyiswa kunze pakati pemadhisiki ne centrifugal force. Kuderera kwekukura kwema grooves zvishoma nezvishoma kunoparadzanisa fiber, inobatsirwa ne lignin yakapfava pakati pavo.
Kubva pane defibrator, pulp inopinda mu 'blowline', chikamu chakasiyana cheMDF maitiro. Iyi pombi yedenderedzwa iri kuwedzera, pakutanga 40 mm muhupamhi, ichiwedzera kusvika 1500 mm. Wakisi inobayiwa padanho rekutanga, iyo inopfekedza mafibhi uye inogovaniswa zvakaenzana nekusagadzikana kwekufamba kwetambo. Urea-formaldehyde resin inobva yaiswa jekiseni sechinhu chikuru chekubatanidza. Wakisi inonatsiridza kusamira zvakanaka kwemwando uye resin pakutanga inobatsira kuderedza kugwamba. Izvo zvinhu zvinooma nekukurumidza mukamuri yekupedzisira inopisa yekuwedzera ye blowline uye inowedzera kuita yakanaka, fluffy uye lightweight fiber. Iyi fiber inogona kushandiswa pakarepo, kana kuchengetwa.
Kugadzira mapepa
Faibha yakaoma inoyamwa pamusoro pe'pendistor', iyo inogovera faibha zvakaenzana mumeti yakafanana pazasi payo, kazhinji ye230-610 mm ukobvu. Meti yacho inominyirirwa kare uye inotumirwa yakananga kuchitsikiro chinopisa chinopfuurira kana kuti kuchekwa kuita mapepa mahombe kuitira muchina unopisa unovhura wakawanda. Iyo inopisa inodzvanya inomisa iyo yekubatanidza resin uye inoseta iyo simba uye density mbiri. Iyo yekutsikirira kutenderera kunoshanda mumatanho, nehupamhi hwemate hunotanga kudzvanywa kusvika kutenderedza 1.5 × iyo yakapedzwa bhodhi ukobvu, yobva yatsikirirwa mberi mumatanho uye kubatwa kwenguva pfupi. Izvi zvinopa chimiro chebhodhi chine nzvimbo dzekuwedzera density, nekudaro simba remuchina, padyo nezviso zviviri zvebhodhi uye isina dense musimboti.
Mushure mekudzvanya, MDF inotonhorera mune nyeredzi yakaoma kana inotonhorera carousel, yakatemwa uye ine jecha. Mune mamwe maapplication, mabhodhi anoiswawo laminated kuti awedzere simba.
MDF kugadzira Maitiro
Any questions please feel free to ask me through Andrew@sinotxj.com
Nguva yekutumira: Jun-22-2022