Ukuphonswa komzimba we-valve kuyingxenye ebalulekile yenqubo yokukhiqiza ama-valve, futhi ikhwalithi yokukhipha ama-valve inquma ikhwalithi ye-valve. Okulandelayo kwethula izindlela ezimbalwa ezijwayelekile zokuphonsa embonini yama-valve:
Ukulingisa isihlabathi:
Ukubunjwa kwesikhunta sesihlabathi okuvame ukusetshenziswa embonini ye-valve kungahlukaniswa kube isihlabathi esimanzi, isihlabathi esomile, isihlabathi se-sodium silicate kanye ne-furan resin self-harding sand ngokusho kwezibophezelo ezahlukene.
(1) Isihlabathi esiluhlaza siyinqubo yokubumba ene-bentonite njengesibopho.
Izici zayo yilezi: isikhunta sesihlabathi asidingi ukomiswa, asidingi ukuqina, isikhunta sesihlabathi sinamandla athile amanzi, umgogodla wesihlabathi kanye negobolondo linokuqina okuhle, okulungele ukuhlanzwa kokukhishwa. Ukusebenza kahle okuphezulu kokukhiqizwa kokubumba, umjikelezo omfushane wokukhiqiza, izindleko eziphansi zezinto ezibonakalayo, ukuhlela ukukhiqizwa komugqa womhlangano kulula.
Ukungalungi kwayo yilezi: ukulingisa kulula ukukhiqiza amaphutha afana ne-porosity, ukufakwa kwesihlabathi nokunamathela kwesihlabathi, futhi ikhwalithi yokukhipha, ikakhulukazi ikhwalithi yangaphakathi, ayilungile.
Isilinganiso kanye nezakhiwo zesihlabathi esiluhlaza se-castings yensimbi imi kanje:
| Inombolo yomkhiqizo | isilinganiso% | ukusebenza | inhloso | ||||||||
| Isihlabathi esisha | Isihlabathi esidala | I-Bentonite | i-sodium carbonate | i-dextrin | i-pulp | okuqukethwe kwamanzi % | Ukungena komoya I-AFS | Amandla okucindezela okumanzi I-KPa | |||
| Iqembu likasayizi wokusanhlamvu | Inani elingeziwe | ||||||||||
| 1 | 10 | 100 | 9/11 | 0.2 | 0.2/0.4 | 3.8/4.3 | 100/200 | 56/77 | Isihlabathi sokubunjwa kwensimbi encane | ||
| 2 | 15 | 50 | 50 | 3 | 0.4 | 0.6/1.2 | 4/4.7 | 100 | 50/75 | Isihlabathi sokubumba umshini | |
(2) Isihlabathi sokubumba esomile siyinqubo yokubumba enobumba njenge-binder. Ukwengeza i-bentonite encane kungathuthukisa amandla ayo amanzi.
Izici zayo yilezi:isikhunta sesihlabathi sidinga ukomiswa, sinokungena kahle komoya, akulula ukukhiqiza iziphambeko ezifana nokugeza isihlabathi, ukunamathela kwesihlabathi kanye nezimbobo zomoya, futhi izinga langaphakathi lokubunjwa lihle.
Ububi bayo yilezi:isidingo semishini yokomisa isihlabathi, umjikelezo wokukhiqiza mude.
Isikhathi sokuthumela: Feb-03-2021
