UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
Greensand Casting Sand
Green sand is moulding sand that is used damp: fine silica sand bound by a little clay and water, so it packs firm round a pattern, holds a sharp shape, and lets steam escape when hot metal is poured. 'Green' means unbaked, not the colour. Bentonite clay is the usual binder; the mix is tempered with water until a squeezed handful holds its shape and breaks cleanly.
Utangiye
1 hour
Amabwiriza
1
1
Sieve the sand
Sieve the sand
With a dust mask on, sieve dry fine quartz sand to remove stones and lumps.
Ibikoresho by'iyi ntambwe:
Umusenyi wa Kwarutsi20 kgIbikoresho bikenewe:
Akayunguruzo Gafite Urukoma Ruto
Agapfukamunwa k'Umukungugu2
2
Add the clay
Add the clay
Weigh in bentonite at about a tenth of the sand's weight and mix it through dry in the trough until the colour is even.
Ibikoresho by'iyi ntambwe:
Ibumba rya bentonite2 kgIbikoresho bikenewe:
Umunzani
Umuyoboro wo kuvangaAgapfukamunwa k'Umukungugu3
3
Temper with water
Temper with water
Mist water over it a little at a time, rubbing the sand between your hands and through the sieve to spread the clay and water evenly.
Ibikoresho by'iyi ntambwe:
Amazi1 litiroIbikoresho bikenewe:
Icupa ryo kuminjagira amaziAkayunguruzo Gafite Urukoma Ruto4
4
Squeeze test
Squeeze test
Squeeze a handful. It should hold the print of your fingers and break cleanly in two when bent, not crumble or stick to your hand. Add sand if sticky, water if crumbly.
5
5
Store damp
Store damp
Keep it covered in a lidded bucket so it stays damp; re-temper before each use.
Ibikoresho bikenewe:
Indobo y'icyuma ifite umufunikoIbikoresho
3- 20 kgUmwanya
- Umwanya
- 1 litiroUmwanya
Ibikoresho bikenewe
6- Umwanya
- Umwanya
- Umwanya
- Umwanya
Iki gishushanyo gikora
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