coulsea
Well-Known Member
3d printers are great for making patterns but files seem to be hard to find, so I thought that I should share mine.
The smaller flywheel is from the 140 mm pattern scaled to 0.65 in the slicer program.
The larger one is a 90 mm pattern at full scale, the blue patterns are lumps to provide hot metal to the flywheel as it cools and shrinks, I feed into one and vent from the other. I am using aluminium bronze which seems to shrink a lot. the blob can be used as a two part pattern to give twice the volume but in this case I am only using it in the top half of the flask. If I use the blobs opposite sides of the pattern the center hub shrinks, the placement in the picture works.
The 90 mm pattern has a larger center hub so I can use a taper lock.
The patterns have draft, slightly tapered spokes in both directions and fillets and work quite well, I give them a couple of coats of spray putty to smooth them and the gloss paint on the red one worked really well.
Enjoy
Andrew
The smaller flywheel is from the 140 mm pattern scaled to 0.65 in the slicer program.
The larger one is a 90 mm pattern at full scale, the blue patterns are lumps to provide hot metal to the flywheel as it cools and shrinks, I feed into one and vent from the other. I am using aluminium bronze which seems to shrink a lot. the blob can be used as a two part pattern to give twice the volume but in this case I am only using it in the top half of the flask. If I use the blobs opposite sides of the pattern the center hub shrinks, the placement in the picture works.
The 90 mm pattern has a larger center hub so I can use a taper lock.
The patterns have draft, slightly tapered spokes in both directions and fillets and work quite well, I give them a couple of coats of spray putty to smooth them and the gloss paint on the red one worked really well.
Enjoy
Andrew