Nea edi kan no, nhyehyɛe a wɔde yɛ castings. Sɛ wɔreyɛ nhyehyɛe a, ɛka geometry ne kɛse a ɛwɔ casting no mu sɛnea ɛyɛ adwuma tebea ne sɛnea dade nneɛma no yɛ adwuma no ho no, ɛho hia nso sɛ wosusuw ntease a ɛwɔ nhyehyɛe no mu no ho fi adwene a ɛwɔ casting alloy no mu ne casting process no su, kyerɛ sɛ, ɛda adi sɛ ne kɛse so nkɛntɛnso ne solidification, shrinkage, adwennwen ne ɔhaw afoforo, sɛnea ɛbɛyɛ a wɔbɛma wɔn a wɔyɛ krak no ne krak a ɛte saa no, de: De: De: De: De: De: De: De: De: De: De: De: De: De: De: De: De: 1011180 nay) nayɛ, shrinkage, shrinkage, adwennwene ne ɔhaw afoforo a ɛte saa no ama, sɛnea ɛbɛyɛ a wɔbɛkwati saa kratasin no, de: De: De: De: De: De: De: De: De: De: De: 101110 de na ɛyɛ saa adwuma no, shrinkage, shrinkage, adwennwene ne ɔhaw afoforo a ɛte saa no antom na ɛte saa no amma.
Nea ɛto so abien no, ɛsɛ sɛ ɔkwan a ntease wom a wɔfa so tow gu wɔ hɔ. Ɛne sɛ, sɛnea wɔahyehyɛ no, emu duru ne kɛse a ɛwɔ casting no mu, casting alloy characteristics ne production conditions, paw parting surface ne shape a ɛfata, core making method, na ntease wom sɛ wode casting bar, cold iron, riser ne pouring system besi hɔ. Sɛnea ɛbɛyɛ a wobetumi ayɛ casting pa.
Nea ɛto so abiɛsa no, nneɛma a wɔde yɛ nneɛma a wɔde yɛ nneɛma a wɔde gu mu no su. Dadeɛ a wɔde hyɛ mu, refractory, petrol, flux, modifier, casting sand, anhwea a wɔde kyekyere, paint ne nneɛma foforɔ no su no nyɛ nea ɛfata, a ɛbɛma sintɔ te sɛ pores, pinholes, slag inclusion, anhwea, ne nea ɛkeka ho, a ɛbɛka sɛnea castings no te ne ne mu su, na ɛbɛma wɔatwitwa castings no agu wɔ nsɛm a ɛyɛ aniberesɛm mu. Nea ɛtɔ so nnan ne dwumadie dwumadie, sɛ wɔbɛhyehyɛ dwumadie nhyehyɛeɛ a ɛfata, ama adwumayɛfoɔ mfiridwuma mu nkɔsoɔ, sɛdeɛ ɛbɛyɛ a wɔde dwumadie nhyehyɛeɛ no bedi dwuma yie.
