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UREMBO NA USTAWI
UJANJA
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SAYANSI
MICHEZO
TEKNOLOJIA
VAZI
Cope and Drag Flask: Oak Frames with Iron Pins and Lugs
A moulding flask holds the sand of a casting mould in two halves, the cope on top and the drag below; pins and holes line them up again after the pattern is taken out, and bars across the cope hold the sand, which is weak in tension. Flasks may be steel, aluminium or wood. Make two oak frames, cross bars for the cope, and forged iron lugs with pins and holes.
The picture: the two halves of a sand mould, opened, with their lugs and pins.
Kati
A day
Maagizo
1
1
Two frames
Two frames
Saw and plane oak into eight sides, about 10 cm deep, and nail them into two identical square frames about 30 cm inside (our size). Check them square.
Vifaa kwa hatua hii:
Ubao wa mbao gumu2 vipande
Misumari ya Chuma24 vipandeZana zinazohitajika:
Msumeno wa mkono
Randa ya mkono
Rula ya kunyoosha
Nyundo yenye kichwa cha msalaba2
2
Bars in the cope
Bars in the cope
Nail two cross bars inside the top frame (the cope), set back from its parting face, to hold the sand.
Vifaa kwa hatua hii:
Ubao wa mbao gumu1 kipandeMisumari ya Chuma8 vipandeZana zinazohitajika:
Msumeno wa mkonoNyundo yenye kichwa cha msalaba3
3
Lugs and pins
Lugs and pins
Forge four flat lugs from iron bar: two with a hole punched through for the cope, two with a short round pin standing up for the drag. Rivet a pair on opposite sides of each frame, lined up so the pins pass through the holes.
Vifaa kwa hatua hii:
Ufito wa chuma kilichofuliwa1 kipande
Rivet za chuma8 vipande
Mkaa2 as requiredZana zinazohitajika:
Fua ya mhunzi
Fuawe
Kitoboa cha moto
Koleo za mhunzi
Kekee cha mkono
Tupa ya chuma4
4
Try the fit
Try the fit
Close the frames on the pins and turn them over: they must come apart and close in exactly the same place. File the pins until they do.
Zana zinazohitajika:
Tupa ya chuma5
5
Sand to fill it
Sand to fill it
Inapakia daftari la Jupyter…
Vifaa
5- 3 vipandeKishikilia Nafasi
- 32 vipandeKishikilia Nafasi
- 1 kipandeKishikilia Nafasi
- 8 vipandeKishikilia Nafasi
- 2 as requiredKishikilia Nafasi
Zana Zinazohitajika
10- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
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