Ukuphosa isihlabathi: Ukuphosa isihlabathi okuvamise ukusetjenziswa embonini yamavalvu nakho kungahlukaniswa kube mihlobo ehlukileko yesihlabathi njengeisihlabathi esimanzi, isihlabathi esomileko, isihlabathi sengilazi yamanzi kanye nesihlabathi esingabhakwako se-furan resinngokuya ngeenhlanganisi ezihlukahlukeneko.
(1) Isihlabathi esihlaza yindlela yokubumba lapho i-bentonite isetjenziswa njengesihlanganisi emsebenzini. Iimpawu zayo ngilezi: isikhunta sesihlabathi esiqediweko asitlhogi ukomisa namkha sibe nokwelatjhwa okukhethekileko kokuqina, isikhunta sesihlabathi sinamandla athileko amanzi, begodu umgogodla wesihlabathi negobolondo zineemvumelwano ezingcono, ezilungele ukuhlanza nokuwisa isihlabathi. Ukusebenza kuhle kokukhiqiza ukubunjwa kuphezulu, umjikelezo wokukhiqiza mfitjhani, begodu iindleko zezinto nazo ziphasi, okulungele ukuhlela ukukhiqizwa kwelayini yokuhlanganisa. Ububi bayo: ukuphoswa kuthambekele ekubeni namaphutha afana nama-pore, ukufakwa kwesihlabathi, nesihlabathi esinamathelako, begodu ikhwalithi yokuphosa, khulukhulu ikhwalithi yangaphakathi, ayikaneli.
(2) Isihlabathi esomileko yindlela yokwenza imodeli ngokusebenzisa ubumba njengesihlanganisi, begodu i-bentonite encani ingenza ngcono amandla waso amanzi. Iimpawu zayo zithi: isikhunta sesihlabathi sitlhoga ukomisa, sinokungena komoya okuhle nokuhlakazeka komoya, akulula ukukhiqiza amaphutha afana nokuhlanzwa kwesihlabathi, ukunamathelana kwesihlabathi, kanye nama-pores, begodu ikhwalithi yangaphakathi yokuphosa nayo ihle khulu. Ububi bayo: imitjhini yokomisa isihlabathi iyatlhogeka, begodu umjikelezo wokukhiqiza mude.
(3) Isihlabathi se-sodium silicate yindlela yokubumba ngokusebenzisa ingilazi yamanzi njengesihlanganisi. Iimfanelo zayo ngilezi: ingilazi yamanzi inomsebenzi wokukwazi ukuqina ngokuzenzakalelako ngemva kokuhlangana ne-CO2, begodu ingaba neenzuzo ezihlukahlukeneko zokwenza imodeli yokuqina kwegesi nokwenza umgogodla. Nanyana kunjalo, kunezinto ezimbi ezifana nokuwohloka okumbi kwamagobolondo, ubudisi bokuhlanza isihlabathi malungana nama-casting, kanye nezinga eliphasi lokubuyiselwa kabutjha kwesihlabathi esisetjenzisiweko.
(4) I-Furan resin no-bake sand molding yindlela yokuphosa nge-furan resin njengesihlanganisi. Emazingeni womtjhiso wegumbi, isihlabathi sokubumba siyapholiswa ngebanga lokusabela kwamakhemikhali kwesihlanganisi ngaphasi kwesenzo se-ejenti yokuphulukisa. Ubunjalo bayo: isikhunta sesihlabathi asitlhogi ukomisa, okwenza bona umjikelezo wokukhiqiza ube mfutjhana begodu ukonga amandla. Isihlabathi sokubunjwa kwe-resin kulula ukusihlanganisa begodu sinokugoqa okuhle, begodu isihlabathi sokubunjwa kwezinto ezifakweko nazo zingahlanzwa lula, ukunemba kwemilinganiso yokuphoswa kuphezulu, begodu ukuqedwa kwephasi kuhle, okungathuthukisa khulu ikhwalithi yezinto ezifakweko. Ububi bayo: iimfuneko zekhwalithi yesihlabathi esihlaza nazo ziphezulu, indawo yokukhiqiza inephunga elicasulako kancani, begodu neendleko ze-resin nazo ziphezulu. Ikambiso yokuhlanganisa isihlabathi esiziqinisako se-furan resin: Isihlabathi esiziqinisako se-resin senziwa ngomhlanganisi wesihlabathi oragela phambili, ukufaka isihlabathi esingakalungiswa, i-resin, i-ejenti yokuphulukisa, njll. ngokulandelana, bese uzihlanganisa msinyana. Hlanganisa begodu usebenzise nanyana kunini. Ukulandelana kokufaka izinto ezihlukahlukeneko ezisetjenziswako lokha nakuhlanganiswa isihlabathi se-resin kunje: isihlabathi sokuthoma + isihlabathi sokuphulukisa (i-p-toluenesulfonic acid aqueous solution) – (120-180S) – i-resin + silane – (60-90S) – isihlabathi (5) Umhlobo wesihlabathi ojwayelekileko Ikambiso yokukhiqiza yokuphosa: ukuphosa ngokunembileko.
Isikhathi sokuposa: Aug-17-2022
