IṢẸ́ ỌNÀ
ẸWÀ ÀTI ÌLERA
IṢẸ́ ỌWỌ́
ÀṢÀ ÀTI ÌTÀN
ÌṢERÉ
ÀYÍKÁ
OÚNJẸ ÀTI OHUN MÍMU
REVERSE ENGINEERING
SÁYẸ́ǸSÌ
ERÉ ÌDÁRAYÁ
ÌMỌ̀-Ẹ̀RỌ
ÀWỌN OHUN WÍWỌ̀
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.
Olùbẹ̀rẹ̀
1 hour
Ìlànà
1
1
Sieve the sand
Sieve the sand
With a dust mask on, sieve dry fine quartz sand to remove stones and lumps.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Iyanrìn Kuátsì20 kgÀwọn irinṣẹ́ tí a nílò:
Ajọ Ojú Kékeré
Ìbòjú Eruku2
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.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Amọ̀ bentonite2 kgÀwọn irinṣẹ́ tí a nílò:
Òǹwọ̀n ìwúwo
Ìgbá àdàpọ̀Ìbòjú Eruku3
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.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Omi1 lítàÀwọn irinṣẹ́ tí a nílò:
Ìgò ìfọn omiAjọ Ojú Kékeré4
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.
Àwọn irinṣẹ́ tí a nílò:
Garawa irin pẹ̀lú ìbòÀwọn ohun-èlò
3- 20 kgÀyè
- 2 kgÀyè
- 1 lítàÀyè
Àwọn irinṣẹ́ tó nílò
6- Àyè
- Àyè
- Àyè
- Àyè
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