1- Kuyini I-Vacuum Casting?
I-Vacuum Casting yaziwa nangokuthi i-Negative Pressure Sealed Casting, i-Reduced Pressure Casting nomaV Inqubo yokusakaza. I-vacuum negative pressure casting iwuhlobo olulodwa lokusakazwa kwesihlabathi esomile futhi kudinga ukusetshenziswa kwemishini yokukhipha umoya ukuze kukhishwe umoya ngaphakathi kwesikhunta sokuphonsa, bese usebenzisa umehluko wengcindezi phakathi kwengaphakathi nangaphandle kwesikhunta ukumboza ifilimu yepulasitiki eshisayo amaphethini nezifanekiso. Isikhunta esibunjiwe sizoba namandla ngokwanele ukumelana nensimbi encibilikisiwe ngesikhathi sokubunjwa. Ngemva kokuthola isikhunta se-vacuum casting, 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 kukulungele ukuthululwa. Ekugcineni, ukubunjwa kutholakala ngemva kokuba insimbi encibilikisiwe ipholile futhi iqina.
2- Yiziphi Izinzuzo Ze-Vacuum Casting?
1) Ivacuum castingsbabe nokunemba okuphezulu kobukhulu, uhlaka olucacile kanye nendawo ebushelelezi.
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.
4) I-vacuum castings ingasetshenziswa ku-aububanzi bezimboni. Ingasetshenziselwa ukukhiqizwa kweqoqo elincane lesiqephu esisodwa kanye nokukhiqizwa ngobuningi, ikakhulukazi ukulingisa okukhulu nosayizi omaphakathi kanye nokulingisa okunezindonga ezincanyana kulungele kakhulu ukusakazwa kwe-vacuum.
3- Yiziphi Izinsimbi nama-alloys Angaphonswa Ngokusakazwa Kwe-Vacuum?
• I-Grey Cast Iron, I-Ductile Cast Iron
• I-Carbon Steel: Ikhabhoni ephansi, ikhabhoni ephakathi nendawo nensimbi ye-carbon ephezulu
• Ama-Cast Steel Alloys: Insimbi ye-alloy ephansi, insimbi ephezulu ye-alloy, insimbi ye-alloy ekhethekile
• I-aluminium nama-alloys ayo
• Ithusi nethusi.
4- Yiziphi Izimboni I-Vacuum Castings Esetshenziselwa Kuzo?
Njengoba kushiwo ngenhla ezinhlelweni zokuphonswa kwe-vacuum, ama-vacuum castings angasetshenziswa 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. Ngakho-ke, ama-vacuum castings asetshenziswa kakhuluimishini yezolimo, amasistimu asebenza ngamanzi, izimoto ezithwala impahla kaloliwe, okhreni nezimboni zokwakha imikhumbi.
5- Yikuphi Ukubekezelela Kokusakaza Okungafinyelelwa Ngenqubo Yokusakaza Nge-Vacuum?
Ngesikhathi sokukhishwa kwe-vacuum, ngoba 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.