Foundry anhwea dwumadie yɛ adeɛ a ɛho hia wɔ casting nhyehyɛeɛ no mu, na ne su no nya castings no pɛpɛɛpɛ ne ne soro su so nkɛntɛnsoɔ tẽẽ. foundry sand no titire ne raw sand, binder ne additives. denam nteaseɛ a ɛwɔ composition akwan ne processing processes so, foundry sand no adwumayɛ betumi atu mpɔn de adi casting ahiadeɛ ahodoɔ ho dwuma.
Anhwea a wɔannoa ne ade titiriw a ɛwɔ foundry sand. anhwea a ɛyɛ mmerɛw a wɔtaa de di dwuma no mu bi ne silica anhwea, zircon anhwea, chromite anhwea, etc{1}} silica anhwea yɛ kɛse esiane ne nneɛma a ɛdɔɔso ne ne bo a ɛba fam. nanso, silica anhwea nni refractoriness a ɛnyɛ papa ne ɔhyew a ɛyɛ den{3}} nti, bere a casting-per-per alloy or labost, labow, labours, labours, labours, labow, labow, large Wɔtaa paw chromite anhwea.
Binders di dwuma a ɛne sɛ wɔde anhwea mu nneɛma bɛka ho na wɔayɛ anhwea nkuku wɔ foundry anhwea. nneɛma a wɔde kyekyere nneɛma a wɔtaa de di dwuma mu no bi ne dɔte, resin ne nsu ahwehwɛ. dɔte a wɔde kyekyere nneɛma ho no bo nyɛ den na ɛfata ma castings a ɛyɛ mpapahwekwa; Resin binders wɔ ahoɔden a ɛkorɔn ne ahoɔhare a ɛyɛ den ntɛmntɛm, na ɛfata ma castings a ɛyɛ pɛpɛɛpɛ; Nsuo ahwehwɛ a wɔde kyekyere nneɛma ho no, wɔde nkakrankakra bu no sɛ ɛsom bo esiane wɔn nneɛma a atwa yɛn ho ahyia ho adwumayɛ pa.
Nneɛma a wɔde ka ho a wɔde ka ho no betumi ama foundry sand. su ahorow bi atu mpɔn sɛ nhwɛso no, fango powder a wɔde bɛka ho no betumi ama anhwea nsusuwso no adwumayɛ a ɛko tia ntini no atu mpɔn; Sɛ wode sawdust ka ho a, ebetumi ama mframa a ɛwɔ anhwea nsusuwso no mu no atu mpɔn na atew pore sintɔ ahorow. so Nea ɛka ho no, wobetumi de nneɛma afoforo a wɔde ka ho, te sɛ graphite powder, coke powder, ne nea ɛkeka ho., aka ho sɛnea ahiade pɔtee bi te na anhwea nsusuwso no adwumayɛ a ɛkɔ akyiri.
Akwan a wɔfa so yɛ foundry anhwea no bi ne anhwea a wɔde frafra, compaction ne regeneration. anhwea a wɔde frafra mu ne sɛ wɔde mfitiase anhwea, binder ne additives bɛfra mu wɔ ɔkwan pɔtee bi so de ahwɛ ahu sɛ anhwea nsusuwso no yɛ pɛ na ɛyɛ den{1}} compacting ne sɛ wɔbɛma anhwea nsusuwso no adu baabi a ɛyɛ compactness fa bi denam vibration, compaction, compaction ne akwan foforo a ɛyɛ dedaw ne deformation no so deflow ne deformation to deform{2 Nneɛma a ɛwɔ hɔ nkutoo na ɛkora nneɛma so nanso ɛtew nneɛma a atwa yɛn ho ahyia a wɔsɛe no so.
Ɛdenam akwan a ntease wom a wɔfa so hyehyɛ nneɛma ne akwan a wɔfa so yɛ adwuma no so no, wobetumi ama foundry sand no adwumayɛ atu mpɔn, wobetumi atew casting ho ka so, na wobetumi ama castings no ayɛ papa.