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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.
Katamtaman
A day
Mga Tagubilin
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.
Mga materyales para sa hakbang na ito:
Tabla ng matigas na kahoy2 piraso
Pakong Bakal24 pirasoMga kailangang kasangkapan:
Lagaring Pangkamay
Katam
Panuwid
Martilyong pahalang ang tulis2
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.
Mga materyales para sa hakbang na ito:
Tabla ng matigas na kahoy1 pirasoPakong Bakal8 pirasoMga kailangang kasangkapan:
Lagaring PangkamayMartilyong pahalang ang tulis3
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.
Mga materyales para sa hakbang na ito:
Baras na pandayang bakal1 piraso
Remaste na bakal8 piraso
Uling2 as requiredMga kailangang kasangkapan:
Pandayan ng panday
Palihan
Mainit na pambutas
Sipit ng panday
Barenang de-kamay
Kikil na Pang-metal4
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.
Mga kailangang kasangkapan:
Kikil na Pang-metal5
5
Sand to fill it
Sand to fill it
Naglo-load ng Jupyter notebook…
Mga Materyales
5- 3 pirasoPlaceholder
- 32 pirasoPlaceholder
- 1 pirasoPlaceholder
- 8 pirasoPlaceholder
- 2 as requiredPlaceholder
Mga Kinakailangang Kasangkapan
10- Placeholder
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- Placeholder
- Placeholder
- Placeholder
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