Zvinoenderana nemusiyano wejecha rinoshandiswa kugadzira molds, jecha rekukanda rinogona kupatsanurwa mumhando dzakasiyana siyana, senge.green sand kukanda, kukanda jecha rakavharidzirwa (shell casting), kuzviomesa jecha uye kukanda jecha rakaoma (rasika foam casting uye vacuum casting). Ichi chinyorwa tichanyanya kusuma matatu anotevera ekukanda jecha maitiro:
Green Sand Kukanda
Ijecha rakasvibirira rinonyanya musanganiswa wakanyorova wejecha nevhu, hapana kemikari inowedzerwa. Iyo mold yejecha inosvinwa pamwe chete uye inobata chimiro chayo. Kusarudzwa kwejecha kune zvakawanda zvekuita nekushisa uko simbi inodururwa. Pakupisa kunodururwa mhangura nesimbi, ivhu rinodzivirirwa nekupisa, iro ivhu risingakuri. Saka pachinzvimbo, ayo anodira simbi anowanzo shanda nesilika jecha iro risingadhure zvichienzaniswa nemamwe majecha.
Resin-yakavharwa Sand Shell Casting
Resin binders ndeyechisikigo kana kuti yakagadzirwa yakakwirira inonyungudika mapfumo. Kunewo maresin anotonhora, ayo anoshandisa catalyst pachinzvimbo chekupisa kurapa binder. Resin binders anonyanya kufarirwa nekuti akasiyana zvivakwa zvinogona kuwanikwa nekusanganiswa neakasiyana ekuwedzera. Zvimwe zvakanakira zvinosanganisira kudonha kwakanaka, kudzika gassing, uye vanosiya yakanaka yepamusoro kupera pakukanda. Shell mold casting process inopa kupedzisa kurinani kwepamusoro, kushivirira kuri nani, uye kubuda kwepamusoro nekuda kwekuderedzwa kutenderera nguva. Zvishandiso zvinogona kushandiswa nemaitiro aya simbi dzakakandwa, uye aluminium nemhangura alloys. Theshell molding casting processinogadzira zvigadziriso zvekuchengetedza mutengo zvezvimiro zvakaoma, midziyo yekumanikidza, uremu huremu, uye castings inoda yepamusoro yepamusoro kupera.
Kuzviomesa nejecha Kukandira
"Jecha rinozviomesa" ishoko rakaonekwa mushure mekunge indasitiri yekugadzira yatora mabhinda emakemikari. Mukugadzirisa jecha kusanganisa, kunze kwekuwedzera bhainda, iyo inosimbisa (yakaoma) iyo inogona kuomesa binder inowedzerwawo. Mushure mekugadzira uye kugadzirwa kwepakati nejecha rakadai, hapana kurapwa (sekuomesa kana kufuridza gasi rinoomesa) rinoshandiswa kuomesa mold kana core, uye mold kana core inogona kuomesa yega.
Nekuti mold inoumbwa pakudziya kwekamuri uye pasina chikonzero chekupisa, iyo yekuzviomesa jecha kukanda kunonziwo kwete-kubikira casting process. Iyo yekuzviomesa nzira inogona kukamurwa kuita acid-catalyzed furan resin uye phenolic resin jecha self-hardening nzira, urethane resin jecha self-hardening nzira uye phenolic monoester self-hardening nzira.
Furan resin inoomesa jecha rekukanda maitiro (nobake process) inoshandisa furan resin yakavharwa jecha kugadzira mold yekukanda. Mushure mekusanganisa jecha rekutanga (kana jecha rakadzoserwa), mvura furan resin uye mvura inokonzeresa zvakaenzana, uye kuizadza mubhokisi repakati (kana jecha bhokisi), wobva waisimbisa kuti iome kuita mold kana mold mubhokisi repakati (kana jecha). bhokisi) pakupisa kwekamuri. Ipapo iyo yekukanda mold kana kukanda core yakaumbwa, iyo inonzi self-hardening inotonhora-core box molding (core), kana self-hardening nzira (core).
Nguva yekutumira: Nov-06-2021