Saizi yekugovera yejecha particles inokanganisa zvakanyanya kunaka kwekukanda. Paunenge uchishandisa coarser grit, simbi yakanyungudutswa inowanzopinda mukati mepakati grit, zvichikonzera kukanda kwakashata. Kushandiswa kwejecha rakatsetseka kunogona kuburitsa nzvimbo iri nani uye yakapfava yekukanda, asi inoda huwandu hwepamusoro hwebhainda, uye panguva imwechete inoderedza kupera kwemhepo kwepakati, izvo zvinogona kukonzera kukanganisa kwekukanda. Mukukandira jecha maitiro, kunyanya kana silica jecha richishandiswa, jecha rakasvibira rinowanzo kuve mukati meiyo inotevera saizi renji:
Avhareji yehunyoro 50–60 AFS (avhareji saizi 220–250 μm): nani pamusoro pemhando uye yakaderera binder kushandiswa.
Fine poda (isingasviki 200 mesh) zvirimo ≤2%: inogona kuderedza huwandu hwebinder
Madhaka emukati (chikamu chemukati chisingasviki 0.02mm) ≤0.5%: inogona kuderedza huwandu hwebinder
Particle saizi kugovera: 95% yejecha yakanamirwa pane 4th kana 5th sieve: nyore kubatanidza uye kuderedza kuzvimba kuremara.
Air permeability yejecha rakaoma: 100-150: kuderedza kukanganisa kwepore
Ceramic jecha, nekuda kweiyo inenge yakatenderedza chidimbu chimiro, yakanakisa fluidity, yakakwirira mhepo permeability, uye hunhu hwekupararira kwehupamhi particle saizi uye imwe-mesh musanganiswa musanganiswa mukugadzira maitiro, mukukanda kudzidzira, mukuwedzera pakutevera zvakajairika hunhu. kune Yayo yakasarudzika gradation maitiro anoita kuti isununguke kubva mukusarura uye delamination panguva yekufambisa uye yekufambisa; ine simba rakanaka rakanyorova mukushandiswa kwejecha rakasvibira mold uye no-bake resin jecha. Kune jecha rekukanda maitiro uchishandisa mabinders, kushandiswa kweakawanda-sese kugovera kunoita kuti zvidimbu zvidiki zvizadze mumipata pakati pezvimedu zvakakura uye inlay mumwe nemumwe, zvichiwedzera "bhiriji rekubatanidza" rebhainda, nekudaro kuvandudza kusimba kwechisungo chepakati, nezvimwe. .Inzira inoshanda.
Kupfupisa mashandisirwo ejecha receramic kweanopfuura makore makumi maviri, iyo particle size inodikanwa uye kugoverwa kwejecha receramic rinoshandiswa munzira dzakasiyana dzekukanda rakanyorwa sezvizvi:
● RCS (Resin Coated Ceramic Sand)
AFS maitiro e50-70, 70-90, uye 90-110 ose anoshandiswa, akagoverwa mu 4 kana 5 sieves, uye kusungirirwa kuri pamusoro pe85%;
● Jecha resin-kubikira
(Kusanganisira furan, alkali phenolic, PEP, Bonnie, etc.): AFS 30-65 inoshandiswa, 4 sieves kana 5 sieves kugovera, kusungirirwa kunopfuura 80%;
● Yakarasika Foam Process / Yakarasika Weight Foundry Process
10/20 mesh uye 20/30 mesh inonyanya kushandiswa, iyo inogona kuvandudza kupenya kwemhepo, kuve nechokwadi chekudzokorora chiyero chejecha receramic mushure mekudururwa, uye kuderedza kushandiswa;
● Cold Box Sand Process
AFS 40-60 inonyanya kushandiswa, yakagoverwa ne 4 kana 5 sieves, uye kusungirirwa kuri pamusoro pe85%;
● 3D Sand Printing
Masefa maviri akagovaniswa, anosvika matatu masefa, ane huwandu hunopfuura 90%, kuve nechokwadi cheunifomu yejecha layer. Ivhareji fineness inoparadzirwa zvakanyanya maererano nekushandiswa kwakasiyana
Nguva yekutumira: Mar-27-2023
