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i have finally finished some of my rough rider cages and bumpers. it is quite a long process, but i am really pleased with the results!!
Here is quick description of how they came into the world!
1, make the original form. i did this using 4 and 6mm diameter acrylic rod, bent using a combination of heat and jigs, glued together with solvents, and 3mm perpex sheet for the mounting plate.
2. make 2 part molds of these using silicone rubber
3, make wax versions of the originals with the mold.
4' 'invest' the waxes in a type of plaster casing, adding runners and risers for the metal to eventually run around.machine off excess bits,
5, put the investments into a kiln for 5 days so that the wax is vaporized out of the plaster leaving a negative space
6, put baked investments into a big pit of sand, pour in molten aluminium, and allow to cool
7, chop away investment to reveal your sexy bits of metal
8, machine off excess bits, fettle, file, smooth, drill, polish and go ooooh!
i hope that is clearish!
If you liked those pictures, you should see these...
new shiny bits at last!