Ukukhutshwa kwevacuum kunamanye amagama amaninzi anje ngevacuum etywiniweyo, ukuphosa kwesanti yoxinzelelo olubi,V inkqubo yokuphosakunye no-V ukuphosa, ngenxa nje yoxinzelelo olubi olusetyenziselwa ukwenza i-mold yokuphosa. Kubaluleke kakhulu ukuphanda iinkqubo zokuphosa ngodonga oluchanekileyo oluphezulufiindawo zokujula zesinyithi eziphosakeleyokuba iinkqubo ziluncedo ekunciphiseni ukusetyenziswa kwamandla, ukonga imathiriyeli ekrwada kunye nokunciphisa ubunzima bomatshini. Ukufezekisa ezi njongo, iindlela ezininzi zokuphosa ziye zaphuhliswa. Inkqubo yokubumba i-vacuum-sealed, i-V-process emfutshane, isetyenziselwa ngokubanzi ukwenza intsimbi kunye neentsimbi zentsimbi ezinodonga oluncinci, ukuchaneka okuphezulu kunye nomphezulu ogudileyo. Nangona kunjalo, inkqubo yokukhupha i-vacuum ayinakusetyenziswa ukugalela iintsimbi zentsimbingobunzima obuncinci kakhulu bodonga, kuba ukugcwaliswa kwesinyithi kulwelo kumgodi wokungunda kuxhomekeke kuphela kwintloko yoxinzelelo lwe-static kwinkqubo ye-V. Ngaphezu koko, inkqubo ayikwazi ukuvelisa ii-castings ezifuna ukuchaneka komgangatho ophezulu kakhulu ngenxa yamandla oxinzelelo oluthintelweyo lokungunda.
Ukuze kuphuculwe isakhono sokuzaliswa kwesinyithi esinyibilikisiweyo solwelo kunye nokwandisa amandla oxinzelelo lwesikhunta, siye saphuhlisa indlela entsha yokuphosa ebizwa ngokuba yi-vacuum-sealed mold casting phantsi koxinzelelo. Al nangona le nkqubo yokuphosa isekelwe kwi-V-process, ihluke ngenxa yokuba kwinkqubo isinyithi solwelo sigcwalisa kwaye siqina kwi-vacuum-seal mold phantsi koxinzelelo oluphezulu. Ngokusebenzisa indlela, ukuchithwa kwetsimbi ngeendonga ezincinci, indawo egudileyo kunye nemilinganiselo echanekileyo iveliswe ngempumelelo.
Umngundo wasebenzisa le nto intshainkqubo yokukhupha ivacuumiyafana naleyo isetyenziselwa inkqubo ye-V eqhelekileyo. Emva kokuba isikhunta senziwe, sifakwa kwisitya. Ngokususa umoya ngokukhupha umbhobho, inqanaba le-vacuum kwi-mold lingagcinwa kwixabiso elimiselweyo. Isinyithi esilulwelo sigalelwa kwi-ladle ngaphakathi kwesitya. Emva koko isitya siyatywinwa; kwaye uxinzelelo lomoya kwinqanawa lunyuswa kwixabiso elichongiweyo ngokupompa umoya ngomjelo. Emva koko, isinyithi se-liquid sigalelwa kwi-mold cavity ngokuguqula ingalo ye-rocker. Ngethuba lenkqubo yokuzaliswa kunye nokuqina, umoya ongaphakathi kwi-mold uqhubekile ukhutshwe ngemibhobho kwaye i-mold igcinwe kwisimo se-vacuum. Emva koko, isinyithi solwelo sizalisa kwaye siqinise phantsi koxinzelelo oluphezulu.
Ngokuqhelekileyo, ukungunda kungenziwa kwaye kugcinwe ekuweni xa umahluko woxinzelelo ngaphezu kwe-50 kPa. Umsebenzi wekhusi lokuvula ukudibanisa umgodi wokungunda kwindala kukukhuthaza ulwelo lwesinyithi oluqukuqela lungene kumgodi wokungunda ngokutsala irhasi okanye umoya ukusuka kumgodi wokungunda ngokusebenzisa isanti eyomileyo ekubumbeni. Xa kukho isikrini esinjalo se-vent, umahluko woxinzelelo uyancipha ngexesha lokugalela; kodwa isephezulu kune-150 kPa, inkulu kakhulu kune-50 kPa. Ke ngoko, isikrini sokungena asiwutshabalalisi umsebenzi wefilimu yeplastiki kwimold yecope.
Ke ngoko inkqubo ye-PV ingasetyenziselwa ukuvelisa udonga olucekethekileyo lokuphosa intsimbi kunyeiicasts zentsimbingokuchaneka okuphezulu. Kwimveliso esebenzayo yokuphosa ezinye iindlela eziqhelekileyo zisetyenziselwa ukuphucula isakhono sokuzaliswa kwesinyithi se-liquid, kubandakanywa nokunyusa intloko yoxinzelelo lwe-static yensimbi engamanzi, ukunyusa ubushushu bobunjwa kunye nokunyusa uxinzelelo lokuzalisa. Ukuncipha koxinzelelo kumgodi omdala kukwayindlela esebenzayo yokunyusa isakhono sokuzalisa.
Amandla oxinzelelo lomngundo kolu hlobo olutsha lwenkqubo yokuphosa i-vacuum evela kumahluko woxinzelelo phakathi kwangaphakathi nangaphandle komngundo. Umkhulu umahluko woxinzelelo, ukukhuhlana okukhulu phakathi kweenkozo zesanti, kunye nokuba nzima ngakumbi ukuhamba kweenkozo zesanti ngokuchasene nenye, okukhokelela kumandla aphezulu oxinzelelo lomngundo. Amandla acinezelayo aphezulu aluncedo ekuveliseni iicastings ngokuchaneka komgangatho ophezulu kunye neziphene zokuphosa ezingaphantsi okanye ezingekho.
Nangona iindlela ezinjengokunyusa umxholo we-binder, ukubhaka ukungunda okuluhlaza kunye nokusebenzisa isanti ebotshelelwe kwintlabathi yonke inokuphucula amandla oxinzelelo lomngundo, ziya kwandisa iindleko zemveliso kakhulu. Phantsi kobushushu obuphezulu ifilimu yeplastiki kumphezulu womgodi wokungunda iyathamba kwaye inyibilike, emva koko ifilimu iyaphuphuma kwaye isasazeke kwisanti yokungunda phantsi kwefuthe lomahluko woxinzelelo, kwaye kwinkqubo ukungunda ilahlekelwa amandla ayo omoya ngokuthe ngcembe. Inkqubo enjalo ibizwa ngokuba yinkqubo yokutshisa-ukulahlekelwa kwefilimu yeplastiki. Izinto ezininzi zichaphazela isantya sokutshisa-ukulahleka kwefilimu yeplastiki, njengohlobo kunye nobukhulu befilimu yeplastiki, ubungakanani bokuphosa, umahluko woxinzelelo phakathi kwangaphakathi nangaphandle komngundo, ubushushu besinyithi esinyibilikisiweyo kunye nokuba kukho ukutyabeka. umaleko kwifilimu yeplastiki. Nangona kunjalo, xa umaleko wokugquma utshizwa kwifilimu, isantya sokutshisa-ukulahlekelwa sinciphisa kakhulu kwaye isikhunta sinepropati efanelekileyo yobungqina bomoya.
Ixesha lokuposa: Jan-24-2021