1. Kodi kuponyera ndi chiyani
Chitsulo chamadzimadzi chimatsanuliridwa mu nkhungu yokhala ndi mawonekedwe oyenerera gawolo, ndipo itatha kulimba, gawo la mankhwala omwe ali ndi mawonekedwe enaake, kukula kwake ndi khalidwe lapamwamba limapezedwa, lomwe limatchedwa kuponyera. Zinthu zitatu zazikulu: alloy, modeling, kuthira ndi kulimbitsa. Ubwino waukulu: magawo ovuta amatha kupangidwa.
2. Kukula kwa kuponyera
Kupanga kunayamba m'ma 1930 pogwiritsa ntchito makina a pneumatic ndi njira za mchenga wadongo.
Mtundu wa mchenga wa simenti unawonekera mu 1933
Mu 1944, mtundu wa chigoba cha mchenga wowuma wolimba wokhazikika unawonekera
CO2 yowumitsa galasi yamadzi yamchenga nkhungu idawonekera mu 1947
Mu 1955, mtundu wa chigoba cha mchenga wa resin udawonekera
Mu 1958, nkhungu ya mchenga wa furan resin osaphika idawonekera
Mu 1967, nkhungu ya mchenga wa simenti idawonekera
Mu 1968, galasi lamadzi lokhala ndi organic hardner linawonekera
M'zaka 50 zapitazi, njira zatsopano zopangira nkhungu zoponyedwa pogwiritsa ntchito njira zakuthupi, monga: maginito opangira maginito, kusindikiza kwa vacuum kusindikiza, kutayika kwa thovu, etc. Njira zosiyanasiyana zoponyera zochokera kuzitsulo zachitsulo. Monga kuponyera kwa centrifugal, kuponyera kwakukulu, kuponyera otsika, kutulutsa kwamadzi, etc.
3. Mawonekedwe akuponya
A. Kusinthasintha kwakukulu ndi kusinthasintha. Zinthu zonse zachitsulo. Kuponya sikuli malire ndi kulemera, kukula ndi mawonekedwe a gawolo. Kulemera kwake kungakhale kuchokera ku magalamu angapo mpaka matani mazana, makulidwe a khoma akhoza kukhala kuchokera ku 0.3mm mpaka 1m, ndipo mawonekedwewo angakhale ovuta kwambiri.
B. Zambiri mwazinthu zopangira ndi zowonjezera zomwe zimagwiritsidwa ntchito ndizochokera kuzinthu zambiri komanso zotsika mtengo, monga zitsulo ndi mchenga.
C. Castings akhoza kusintha kulondola kwa dimensional ndi khalidwe lapamwamba la castings kudzera mwaukadaulo wapamwamba woponya, kotero kuti mbali zitha kudulidwa mochepa komanso popanda kudula.
Nthawi yotumiza: Aug-11-2022
