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Casting Flask Lugs - Pin Design
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Pin and Lug design for sand casting flasks.
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All credit to Olfoundryman over on YouTube for the idea. If you have not seen his videos, then they are worth a look if you want to see some very valuable trips on metal casting.
This is my "Version 2" of the Lugs/Ears for metal casting flasks and include:
- Pattern for the Lugs themselves
- Jig to help drilling the holes square
- Feeder in case you need them to prevent shrinkage
- For those with a large enough resin printer, a Pattern Boad with runners and lugs
This idea of the design is:
- Easy to print and Easy to cast.
- Smaller profile so it can be attached to frames down to 40mm heigh.
- Uses 8mm partially threaded bolts (cut the heads off and bolt onto the top Lug/Ear). Pick a bolt length to suit your flask.
- Can be attached to wood or metal frames.
Printing: Nothing special but FWIW:
- I printed the patterns of a Resin Printer as it gives a castable pattern without any sanding
- I printed the Jib on an FDM printer as it is cheaper
When Cutting the Slot on one of the four Lugs, I roughly cut it out then used a file to make an accurate slot. When filing, I kept testing with a bolt till it just fit through the slot.