I-Vacuum Casting ibizwa nangokuthi i-Negative Pressure Sealed Casting, i-Reduced Pressure Casting nomaV Inqubo yokusakaza. Ukukhishwa kwengcindezi ye-vacuum kudinga ukusetshenziswa kwemishini yokukhipha umoya ukuze kukhishwe umoya ngaphakathi kwesikhunta sokuphonsa, bese usebenzisa umehluko wengcindezi phakathi kwangaphakathi nangaphandle kwesikhunta ukumboza ifilimu yepulasitiki eshisayo kuphethini nesifanekiso. Isikhunta esibunjiwe sizoba namandla ngokwanele ukumelana nensimbi encibilikisiwe ngesikhathi sokubunjwa. Ngemuva kokuthola isikhunta se-vacuum, gcwalisa ibhokisi lesihlabathi ngesihlabathi esomile ngaphandle kwe-binder, bese uvala indawo engaphezulu yesikhunta sesihlabathi ngefilimu yepulasitiki, kulandelwa i-vacuum ukwenza isihlabathi siqine futhi siqine. Ngemuva kwalokho, susa isikhunta, ubeke ama-sand cores, uvale isikhunta ukuze wenze konke kulungele ukuthululwa. Ekugcineni, ukubunjwa kutholakala ngemva kokuba insimbi encibilikisiwe ipholile futhi iqina.
I-Ductile cast iron, emele iqembu le-cast iron, ebizwa nangokuthi i-nodular iron. I-nodular cast iron ithola i-nodular graphite ngokusebenzisa i-spheroidization kanye nokwelashwa kwe-inoculation, okuthuthukisa ngokuphumelelayo izakhiwo zemishini yensimbi ekhonjiwe, ikakhulukazi i-plasticity nokuqina, ukuze uthole amandla aphezulu kune-carbon steel. I-Ductile iron ayiyona into eyodwa kodwa iyingxenye yeqoqo lezinto ezingakhiqizwa ukuze zibe nezinhlobonhlobo zezakhiwo ngokulawula i-microstructure. Isici esivamile esichazayo saleli qembu lezinto zokwakha ukuma kwegraphite. Kuma-ayina ama-ductile, i-graphite isesimweni samaqhuqhuva esikhundleni sama-flakes njengoba isensimbi empunga.
Izinzuzo ze-Vacuum Casting Process
1) Ivacuum castingsbabe nokunemba okuphezulu kobukhulu, uhlaka olucacile kanye nendawo ebushelelezi.
Ngenxa yokuthi ubuso bemodeli bumbozwe ngefilimu yepulasitiki, asikho isidingo sokudlidliza noma ukungqongqoza lapho udonsa isikhunta. Ukumunca kanye nokucindezela okungalungile kwenza isihlabathi sokubumba sihlangane, futhi ubulukhuni besikhunta sesihlabathi buphezulu futhi bufana. Ngaphansi kokushisa kwensimbi encibilikisiwe, umgodi akulula ukuwohloka. Ngaphezu kwalokho, ukuba khona kokucindezela okungalungile kuhambisana nokugcwaliswa okugcwele kwensimbi encibilikisiwe kumodeli. Ubukhulu obuphezulu be-V inqubo yokusakaza bungafinyelela ku-Ra = 25 ~ 2.5μm. Izinga lokubekezelela kobukhulu lokulingisa lingafinyelela ku-CT5 ~ CT7. Ikhwalithi yokubukeka kokuphonswa kwengcindezi engalungile yinhle, futhi ikhwalithi yangaphakathi inokwethenjelwa.
I-2) Azikho izibophezelo, amanzi kanye nezithasiselo esihlabathini sokubumba, okwenza ukucubungula kwesihlabathi kube lula.
3) Kulula ukuhlanza ama-vacuum castings. Amagesi ayingozi kancane akhiqizwa phakathi nenqubo yokuphonsa.
I-4) I-vacuum castings ingasetshenziswa ezinhlobonhlobo zezimboni. Ingasetshenziselwa ukukhiqizwa kweqoqo elincane lesiqephu esisodwa kanye nokukhiqizwa ngobuningi, ikakhulukazi ukulingisa okukhulu nosayizi omaphakathi kanye nokulingisa okunezindonga ezincanyana kulungele kakhulu ukusakazwa kwe-vacuum.
Kungani Ukhetha I-RMC Foundry ye-Custom Vacuum Castings?
• Ukubuyiswa kalula kwesihlabathi ngoba ama-binders awasetshenziswa
• Isihlabathi asidingi ukulungiswa kabusha ngomshini.
• Ukungena kahle komoya ngenxa yokuthi awekho amanzi kuxutshwa nesihlabathi, ngakho-ke kuyancipha ukubunjwa kwamaphutha.
• Ilungele ukulingisa ngezinga elikhulu
• Ibiza ngempumelelo, ikakhulukazi ekulingisini okukhulu.
