Vacuum Casting imatchedwanso kuti Negative Pressure Seled Casting, Reduced Pressure Casting kapenaV Process Casting. Vacuum kuthamanga kuponyera amafuna kugwiritsa ntchito zida mpweya m'zigawo kuchotsa mpweya mkati mwa nkhungu kuponyera, ndiyeno ntchito mavuto kusiyana mkati ndi kunja kwa nkhungu kuphimba mkangano pulasitiki filimu pa chitsanzo ndi Chinsinsi. Chikombole choponyera chidzakhala cholimba kuti chitha kupirira chitsulo chosungunula panthawi yoponya. Mukapeza nkhungu ya vacuum, lembani m'bokosi la mchenga ndi mchenga wowuma popanda binder, ndiyeno musindikize pamwamba pa nkhungu yamchenga ndi filimu yapulasitiki, ndikutsatiridwa ndi vacuum kuti mchenga ukhale wolimba komanso wolimba. Pambuyo pake, chotsani nkhungu, ikani mchenga, kutseka nkhungu kuti zonse zikonzekere kutsanulira. Potsirizira pake, kuponyedwa kumapezedwa pambuyo poti chitsulo chosungunula chizikhazikika ndikukhazikika.
Ductile cast iron, yomwe imayimira gulu lachitsulo, lomwe limatchedwanso nodular iron. Nodular kuponyedwa chitsulo amapeza nodular graphite kudzera spheroidization ndi inoculation mankhwala, amene bwino bwino makina katundu wa chitsulo chotayidwa, makamaka plasticity ndi kulimba, kuti apeze mphamvu apamwamba kuposa mpweya zitsulo. Chitsulo chachitsulo sichinthu chimodzi koma ndi gawo la gulu la zipangizo zomwe zingathe kupangidwa kuti zikhale ndi katundu wambiri pogwiritsa ntchito microstructure. Chikhalidwe chodziwika bwino cha gulu ili la zipangizo ndi mawonekedwe a graphite. Muzitsulo za ductile, graphite imakhala ngati tinthu tating'onoting'ono osati ma flakes monga momwe ili muchitsulo chotuwa.
Ubwino wa Vacuum Casting Process
1) Thevacuum castingskukhala ndi mawonekedwe olondola kwambiri, mawonekedwe omveka bwino komanso malo osalala.
Chifukwa pamwamba pa chitsanzocho yokutidwa ndi filimu pulasitiki, palibe chifukwa kunjenjemera kapena kugogoda pamene kukoka nkhungu. Kuthamanga ndi kukakamiza koyipa kumapangitsa mchenga wowumba kukhala wophatikizika, ndipo kuuma kwa nkhungu yamchenga kumakhala kwakukulu komanso kofanana. Pansi pa kutentha kwachitsulo chosungunula, patsekeke sikophweka kupunduka. Kuphatikiza apo, kukhalapo kwa kukakamizidwa koyipa kumathandizira kudzaza kwathunthu kwachitsulo chosungunuka muchitsanzo. Pamwamba roughness wa V ndondomeko castings angafikire Ra = 25 ~ 2.5μm. The dimensional kulolerana mlingo wa castings akhoza kufika CT5 ~ CT7. Mawonekedwe amtundu wa kuponderezedwa kolakwika ndiabwino, ndipo mawonekedwe amkati ndi odalirika.
2) Palibe zomangira, madzi ndi zowonjezera mumchenga woumba, zomwe zimapangitsa kuti mchenga ukhale wosavuta.
3) Ndikosavuta kuyeretsa ma vacuum castings. Mipweya yocheperako imapangidwa panthawi yoponya.
4) Zida zoponyera vacuum zitha kugwiritsidwa ntchito m'mafakitale osiyanasiyana. Itha kugwiritsidwa ntchito popanga gulu laling'ono lachidutswa chimodzi komanso kupanga misa, makamaka ma castings akulu ndi apakatikati ndi ma castings okhala ndi mipanda yopyapyala ndioyenera kuponya vacuum.
Chifukwa Chiyani Mukusankha RMC Foundry for Custom Vacuum Castings?
• Kubwezeretsa mosavuta mchenga chifukwa zomangira sizikugwiritsidwa ntchito
• Mchenga sufuna kukonzanso makina.
• Mpweya wabwino wodutsa chifukwa palibe madzi umasakanizidwa ndi mchenga, choncho kuchepa kwa mpweya kumachepa.
• Zoyenera kwambiri paziwonetsero zazikulu
• Kutsika mtengo, makamaka kwa ma castings akuluakulu.
