Uma isihlabathi se-foundry sithathelwa indawo yisihlabathi se-ceramic ekukhiqizeni ama-castings, izinkinga eziningi ezihlangatshezwana nazo ekukhiqizeni inqubo ye-furan resin self-setting sand zingaxazululwa kahle.
Isihlabathi se-Ceramic yisihlabathi sokwenziwa esiyindilinga esine-refractoriness ephezulu esekelwe ku-Al2O3. Ngokuvamile, okuqukethwe kwe-alumina kungaphezu kuka-60%, okuyisihlabathi esingathathi hlangothi. Ngokuyisisekelo ayiphenduli nge-furan resin ne-hardener, enganciphisa ngempumelelo ukusetshenziswa kwe-asidi futhi ithuthukise ikhwalithi yokuphonsa.
Uma kuqhathaniswa nesihlabathi se-silica, inani le-resin ne-hardener eyengeziwe esihlabathini se-ceramic liyancipha kakhulu. Uma inani le-resin elengeziwe lincishiswa ngo-40%, amandla esihlabathi esibumbayo asephezulu kunalawo esihlabathi se-silica. Ngenkathi izindleko zokuphonsa zincishisiwe, ukuphuma kwegesi kuyancishiswa kusuka ekubunjweni kwesihlabathi noma umgogodla, ukukhubazeka kwe-porosity kuncishiswa kakhulu, ikhwalithi yokuphonsa iyathuthukiswa, futhi izinga lokukhiqiza liyakhula.
Ukuze kubuyiswe kabusha isihlabathi se-furan resin, okwamanje, ukubuyiselwa kokushayisana komshini kuthandwa kakhulu e-China. I-silica sand recycling isebenzisa indlela yomshini. Ngesikhathi senqubo yokuvuselela, izophulwa, ubukhulu bezinhlayiya zesihlabathi sokuvuselelwa buyoba bucolisekile, inani elihambisanayo le-resin eyengeziwe lizokwanda, futhi ukusebenza kokukhipha umoya kwesihlabathi esibunjwayo kuzoba kubi kakhulu. Kodwa-ke usayizi wezinhlayiyana zesihlabathi se-ceramic cishe ngeke ushintshe ngendlela yokushayisana kwemishini phakathi nezikhathi ezingama-40, okungaqinisekisa ngempumelelo ikhwalithi yokubunjwa kwezinzile.
Ngaphezu kwalokho, isihlabathi se-silica siyisihlabathi se-polygonal. Ekwakhiweni kokubumba, i-engeli yokusalungiswa yezingcezu ezincane neziphakathi ngokuvamile iklanywa cishe ku-1%. Isihlabathi se-Ceramic siyindilinga, futhi ukungqubuzana kwaso okuhlobene kuncane kunesihlabathi se-silica, ngakho-ke i-engeli yokusalungiswa ingancishiswa ngokufanele, konga izindleko zomshini olandelayo. Izinga lokubuyiselwa kwesihlabathi se-silica liphansi, izinga lokuthola kabusha lingama-90% ~ 95%, imfucuza eqinile iyakhiqizwa, futhi kunothuli oluningi endaweni yokuphonsa yeshabhu. Izinga lokubuyiselwa kwesihlabathi se-ceramic lingafinyelela ngaphezu kwama-98%, elinganciphisa ngempumelelo ukukhishwa kwemfucuza eqinile futhi lenze indawo yokusebenzela yokukhiqiza ibe luhlaza futhi inempilo.
Isihlabathi se-Ceramic sinokuphika okuphezulu, eduze nokuma okusanhlamvu okuyindilinga kanye noketshezi oluhle. Ngesikhathi sokukhiqizwa kwe-castings, ngokuyisisekelo akukho ukukhubazeka kwesihlabathi esinamathelayo okuzokwenzeka, okunganciphisa ngempumelelo umsebenzi wokuhlanza nokugaya. Ngaphezu kwalokho, izinga noma inani le-coating lingancishiswa, futhi kunciphise izindleko zokukhiqiza zokubunjwa.
Isikhathi sokuthumela: Jun-14-2023
