Ukujulwa kwevalvu yomzimba yinxalenye ebalulekileyo yenkqubo yokwenziwa kwevalvu, kwaye umgangatho wokwenziwa kwevalvu umisela umgangatho wevalvu. Oku kulandelayo kwazisa iindlela ezininzi eziqhelekileyo zokuphosa kushishino lwevalvu:
Ukugalelwa kwesanti:
Ukubunjwa kwesanti okuqhelekileyo kusetyenziswa kushishino lwevalvu kunokohlulwa ngokwesanti emanzi, isanti eyomileyo, isanti yesodium silicate kunye nefulan resin self-harding sand ngokwezibophelelo ezahlukeneyo.
(1) Isanti eluhlaza yinkqubo yokubumba kunye ne-bentonite njenge-binder.
Iimpawu zayo zezi: ukubumba kwesanti akufuneki ukuba kumiswe, akufuneki ukuba kuqiniswe, isikhunta sesanti sinamandla athile amanzi, isiseko sesanti kunye negobolondo sinokuqina okulungileyo, okukulungele ukucocwa kokuphosa. Ukusebenza okuphezulu kwemveliso yokubumba, umjikelezo omfutshane wemveliso, ixabiso eliphantsi lezinto eziphathekayo, kulula ukuququzelela ukuveliswa komgca wendibano.
Ukungalungi kwayo kukuba: ukuphosa kulula ukuvelisa iziphene ezifana ne-porosity, ukufakwa kwesanti kunye nokunamathela kwesanti, kunye nomgangatho wokuphosa, ngokukodwa umgangatho wangaphakathi, awufanelekanga.
Umlinganiselo kunye neempawu zesanti eluhlaza kwi-castings yentsimbi zimi ngolu hlobo lulandelayo:
| Inombolo yesiriyeli | umxube% | ukusebenza | injongo | ||||||||
| Isanti entsha | Isanti endala | Bentonite | sodium carbonate | dextrin | ipulp | umxholo wamanzi % | Ukungena komoya AFS | Amandla oxinzelelo olumanzi KPa | |||
| Iqela lobungakanani beenkozo | Imali eyongeziweyo | ||||||||||
| 1 | 10 | 100 | 9/11 | 0.2 | 0.2/0.4 | 3.8/4.3 | 100/200 | 56/77 | Isanti yeentsimbi ezincinci zentsimbi | ||
| 2 | 15 | 50 | 50 | 3 | 0.4 | 0.6/1.2 | 4/4.7 | 100 | 50/75 | Isanti yokubumba umatshini | |
(2) Isanti yokubumba eyomileyo yinkqubo yokubumba ngodongwe njengesibophelelo. Ukongeza i-bentonite encinci inokuphucula amandla ayo amanzi.
Iimpawu zayo zezi:isikhunta sesanti sifuna ukomiswa, sinokungena komoya okulungileyo, akukho lula ukuvelisa iziphene ezifana nokuhlamba isanti, ukunamathela kwesanti kunye nemingxuma yomoya, kwaye umgangatho wangaphakathi wokuphosa ulungile.
Ukungalungi kwayo zezi:isidingo sezixhobo zokumisa isanti, umjikelo wemveliso ude.
Ixesha lokuposa: Feb-03-2021
