Kwiinkqubo zokukhupha iplastiki — nokuba kukuveliswa kwemibhobho, iiprofayili, iipellets, okanye iintambo — ukufikelela kumgangatho wemveliso ohambelanayo kufuna okungaphezulu nje kobushushu obufanelekileyo kunye noyilo lwezikrufu. Elinye icandelo elihlala lingajongwa kodwa libalulekileyo yipompo yevacuum.
Ngexesha lokukhupha igesi, izinto ezikrwada zeplastiki ziyafudunyezwa zize zibe kwimeko yokunyibilika. Le nkqubo ikhupha umswakama, umoya ovalelweyo, ii-monomers, ii-oligomers, kunye nezinye izinto eziguquguqukayo. Ukuba ezi gesi zihlala kwi-melt, zenza amaqamza, iziphene zomphezulu (ezidla ngokubizwa ngokuba yi-"silver streaks"), kunye ne-internal voids. Isiphumo yimveliso ebuthathaka, engathandekiyo engaphumeleliyo kwimigangatho yomgangatho. Ipompo ye-vacuum isombulula oku ngokudala uxinzelelo olubi kwindawo yokukhupha igesi yomkhupheli, isusa rhoqo izinto eziguquguqukayo kwaye iqinisekise ukunyibilika okuxineneyo, okufanayo.
Nangona kunjalo, umjelo wegesi okhutshiweyo awucocekanga kwaphela. Ngokwesiqhelo uqulathe uthuli lweplastiki, amasuntswana ekhabhoni awonakeleyo, inkungu yeoyile, kwaneentsalela ze-tarry ezinamathelayo ezivela ekuboleni kobushushu. Ukuba ezi zinto zingcolileyo zitsalwa ngqo kwimpompo ye-vacuum, iziphumo ziba zibi kakhulu. Iimpompo ze-rotary vane zinengxaki yeenkqubo zeoyile ezivalekileyo kunye nee-vane ezibanjiweyo. Iimpompo ze-screw ezomileyo zifumana ukuguguleka kwe-rotor kunye nomonakalo we-coating. Nokuba yeyiphi na imeko, ukusebenza kwempompo konakala ngokukhawuleza, rhoqo kwiiveki okanye kwiintsuku.
Kulapho ke kulapho kufumaneka khona ipompo yokufunxa esemgangathweni ophezuluisihluzoiba yinto efunekayo. Xa ifakwe phakathi kwe-extruder kunye nepompo, isihluzi sibamba amasuntswana aqinileyo kunye nee-aerosols ngaphambi kokuba zibangele umonakalo wangaphakathi. Inkqubo yesihluzi eyilwe kakuhle ikhusela iindawo ezihambayo zepompo, igcina amanqanaba e-vacuum azinzileyo, kwaye yandisa ubomi benkonzo ngokumangalisayo.
Kubasebenzi beentambo zokukhupha izinto, ukhetho lulula: sebenzisa i-extrusion line ungakhuselekanga kwaye ujongane nokusilela rhoqo kwepompo, okanye utyale imali kwi-ukuhluza okufanelekileyokwaye wonwabele imveliso ethembekileyo neqhubekayo. Isihluzo sibiza iqhekeza lepompo esikhuselayo - kodwa senza umahluko omkhulu phakathi komgca onzima nomgca osebenza kakuhle. Emva kwayo yonke loo nto, ukukhupha okuthembekileyo kuqala nge-vacuum ecocekileyo.
Ixesha leposi: Meyi-05-2026
