The okhazikika nkhungu kuponyera amatanthauza njira kuponyera amene ntchito chitsulo nkhungu wapadera (kufa) kulandira wosungunuka madzi kuponyedwa zitsulo. Ndizoyenera kutulutsazoponyamochuluka. Njira zopangira izi zimatchedwa chitsulo kufa kuponyera kapena kuponyera mphamvu yokoka, popeza chitsulo chimalowa mu nkhungu pansi pa mphamvu yokoka.
Poyerekeza ndi kuponyera mchenga, chipolopolo nkhungu kuponyera kapena kuponyera ndalama, imene nkhungu ayenera kukonzekera aliyense wa kuponyera, ndi okhazikika nkhungu kuponyera akhoza kutulutsa castings ndi machitidwe akamaumba omwewo kwa mbali iliyonse kuponyera.
Zomwe nkhungu zoponyera zokhazikika zimaganiziridwa poganizira kutentha kwa kuthira, kukula kwa kuponyera ndi kuchuluka kwa kuzungulira kwa kuponyera. Amazindikira kutentha kwathunthu komwe kufa. Fine-grained gray cast iron ndiye chinthu chomwe chimagwiritsidwa ntchito kwambiri. Alloy cast iron, carbon steel and alloy steels (H11 ndi H14) amagwiritsidwanso ntchito popanga ma voliyumu akulu kwambiri komanso magawo akulu. Ma graphite amatha kugwiritsidwa ntchito popanga voliyumu yaying'ono kuchokera ku aluminiyamu ndi magnesium. Moyo wakufa umakhala wocheperako pakutentha kwapamwamba kosungunuka monga chitsulo chamkuwa kapena imvi.
Popanga zigawo zilizonse zopanda kanthu, ma cores amagwiritsidwanso ntchito popanga nkhungu kosatha. Miyendo imatha kupangidwa ndi chitsulo kapena mchenga. Mchenga ukagwiritsidwa ntchito, njirayo imatchedwa semi-permanent moulding. Komanso, chitsulo chachitsulo chiyenera kuchotsedwa mwamsanga pambuyo pa kulimba; apo ayi, kuchotsa kwake kumakhala kovuta chifukwa cha kuchepa. Pamawonekedwe ovuta, zitsulo zachitsulo zomwe zimagwedezeka (zidutswa zingapo) nthawi zina zimagwiritsidwa ntchito ngati nkhungu zokhazikika. Kugwiritsiridwa ntchito kwawo sikokwanira chifukwa n'kovuta kuyika pachimake pachinthu chimodzi monganso chifukwa cha kusiyana kwakukulu komwe kungachitike. Chifukwa chake, ndi ma cores otha kugwa, wopanga amayenera kupereka kulolerana kolimba pamiyeso iyi.
Pansi pa kuponyedwa kwanthawi zonse, kutentha komwe nkhungu imagwiritsidwa ntchito kumadalira kutentha kwa kuthira, kuponyera pafupipafupi, kulemera kwa kuponyera, mawonekedwe oponya, makulidwe a khoma, makulidwe a khoma la nkhungu ndi makulidwe a nkhungu. Ngati kuponyera kwachitika ndi kufa kozizira, zoyambira zochepa zimatha kukhala ndi zolakwika mpaka kufa kukafika kutentha kwake. Pofuna kupewa izi, nkhungu iyenera kutenthedwa kale ku kutentha kwake, makamaka mu uvuni.
Zida zomwe nthawi zambiri zimapangidwira mu nkhungu zokhazikika ndi ma aloyi a aluminiyamu, ma aloyi a magnesium, ma aloyi amkuwa, ma aloyi a zinc ndi chitsulo chotuwa. Kulemera kwa unit kumachokera ku magalamu angapo mpaka 15 kg muzinthu zambiri. Koma ngati ndi aluminiyumu, zopangira zazikulu zolemera mpaka 350 kg kapena kupitilira apo zitha kupangidwa. Kuponyedwa kosatha kwa nkhungu ndikoyenera kwambiri kupanga mapangidwe ang'onoang'ono, osavuta okhala ndi makulidwe a khoma lofanana komanso opanda zomangira zovuta.
Ubwino Wa Permanent Mold Casting Process:
1. Chifukwa cha nkhungu zachitsulo zomwe zimagwiritsidwa ntchito, njira iyi imapanga kuponyedwa kwabwino kwambiri komwe kumakhala ndi makina apamwamba kwambiri.
2. Amapanga mapeto abwino kwambiri apamwamba a dongosolo la ma microns 4 ndi maonekedwe abwino
3. Kulolerana kolimba kumatha kupezeka
4. Ndizopanda ndalama pakupanga kwakukulu chifukwa ntchito yomwe ikukhudzidwa ndi nkhungu imachepetsedwa
5. Mabowo ang'onoang'ono amatha kupangidwa poyerekeza ndi kuponya mchenga
6. Zoyikapo zimatha kuponyedwa m'malo mwake
| Kufananiza Njira Zosiyanasiyana Zoponyera
| |||||
| Zinthu | Kuponya Mchenga | Permanent Mold Casting | Die Casting | Investment Casting | Chemical Bonded Mold Mold Casting |
| Kulolerana kofananirako, mainchesi | ± .010" | ± .010" | ± .001" | ± .010" | ± .005" |
| ± .030" | ± .050" | ± .015" | ± .020" | ± .015" | |
| Mtengo wofananira mu kuchuluka | Zochepa | Zochepa | Chotsikitsitsa | Wapamwamba kwambiri | Mkulu wapakatikati |
| Mtengo wachibale wa nambala yochepa | Chotsikitsitsa | Wapamwamba | Wapamwamba kwambiri | Wapakati | Mkulu Wapakati |
| Kulemera kovomerezeka kwa kuponyera | Zopanda malire | 100 lbs. | 75 lbs. | Ma ounces mpaka 100 lbs. | Zipolopolo ozs. Ku 250 lbs. osaphika 1/2 lb - matani |
| Thinnest gawo castable, mainchesi | 1/10" | 1/8" | 1/32" | 1/16" | 1/10" |
| Zogwirizana pamwamba | Zabwino mpaka zabwino | Zabwino | Zabwino kwambiri | Zabwino kwambiri | Chipolopolo chabwino |
| Kusavuta kofananira kwa mapangidwe ovuta | Zabwino mpaka zabwino | Zabwino | Zabwino | Zabwino kwambiri | Zabwino |
| Kuthekera kofananira kosintha kapangidwe kake | Zabwino kwambiri | Osauka | Osauka kwambiri | Zabwino | Zabwino |
| Mitundu yosiyanasiyana ya aloyi yomwe imatha kuponyedwa | zopanda malire | Aluminiyamu ndi mkuwa maziko abwino | Aluminiyamu maziko prepferable | Zopanda malire | Zopanda malire |
Nthawi yotumiza: Jan-29-2021