Kuzizira kwa Metal Casting

Kuzizira ndi zinthu zoziziritsa kukhosi zomwe zimayikidwa mkati mwabowo, pamwamba pa bowo ndi mkati mwa nkhungu kuti zifulumizitse kuzirala kwapomweko. Kuzizira kumagwiritsidwa ntchito molumikizana ndi gating system ndi riser system kuti azitha kuwongolera kukhazikika kwa ma castings kuti apeze castings oyenerera.

Kuzizira kumagawidwa kukhala kuzizira kwamkati ndi kunja kuzizira. Chitsulo chozizira chachitsulo chomwe chimayikidwa pabowo ndipo chimatha kusungunuka ndikuponyera chimatchedwa kuzizira kwamkati; pamene zitsulo zozizira kwambiri zomwe zimayikidwa pamwamba pa chitsanzo (kapena core box) zimatchedwa kuzizira kwakunja. Kuzizira kwamkati pamapeto pake kudzakhala gawo lazojambula, choncho ziyenera kupangidwa ndi zinthu zomwezo monga kuponyedwa. Kuzizira kwakunja kumatha kubwezeretsedwanso ndikugwiritsidwanso ntchito.

 

Zida Zozizira:

Zida Zachitsulo: Chitsulo chachikulu cha carbon, chitsulo chapakati cha carbon, chitsulo choponyedwa, mkuwa, aluminiyamu kapena zinthu zomwezo monga momwe mukufunira.
Zida Zopanda zitsulo: mchenga wa zircon, graphite, mchenga wa carbon, chrome magnesia, mchenga wa chrome, magnesia.

 

Zochita za Chills:

1) Chepetsani kukula kwa chokwera ndikuwonjezera mlingo woyenera. Zoyeserera zawonetsa kuti pogwiritsa ntchito kuzizira koyenera komanso ukadaulo wowonjezera wotenthetsera kutentha, kuchuluka kwazitsulo komaliza kukhoza kukhala kokwera kwambiri.
2) Kuyika zoziziritsa kukhosi pagawo loyenera la kuponyera kumatha kukonza njira yodyetsera. Ikhoza kupititsa patsogolo khalidwe lamkati la castings ndikupereka ma castings apamwamba kwambiri.
3) Kugwiritsiridwa ntchito kwa kuzizira pamodzi ndi dongosolo lokwera kungapangitse mtunda wodyetsa wa chokwera.
4) Chotsani kupsinjika kwa kutentha kwanuko ndikuletsa ming'alu. Popanga zitsulo zazikulu, mchenga wa chromate kapena mchenga wa zircon wokhala ndi kuzizira kwabwino uyenera kugwiritsidwa ntchito.
5) Kuyika zoziziritsa kukhosi kumatha kufulumizitsa kuchuluka kwa kulimba kwa kuponyera, kuyeretsa kapangidwe ka tirigu, ndikusintha mawonekedwe amakina akuponya.