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bendybot mold (cerby's crawlers 03)

by cerberus333, published

bendybot mold (cerby's crawlers 03) by cerberus333 Dec 6, 2012

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Summary

This is a mold of a accordion limbed robot for casting in oogoo.
http://www.instructables.com/id/How-To-Make-Your-Own-Sugru-Substitute/
I wanted a figure with snake-like arms and legs to bend around things and look cool!
I attached the model of the bot as a file if you want to print it as a figure.

not a derivative but props to jasonwebb for inspiration with this thing: thingiverse.com/thing:31581

Instructions

not printed as yet will update once printed.

print in ABS for the molds, I have not tested oogoo in PLA.
I used a 10% infill and the finer a slice the better.
Also i have found that acetone wash on the mold cavity
makes a smooth surface which looks great on the castings.

the holes thru the corners of the mold halves are for alignment, use a nail
or other rod to align the halves when press molding.

casting process: fast cast:
mix your oogoo and pack the mold halves
place copper wire in the center of the arms and legs
for the arms i make one wire hand to hand thru the torso.
to center the wire place a few beads on the ends and middle of the limbs
(size of beads depend on the mold size and wire size)
for the legs again go foot to foot (make a extension into the body a bit to help
anchor the wire)
again beads help keep the wire centered.
once the packed halves are ready to be merged
i use nails in the 4 holes to align the sides.
and c-clamps to squeeze the 2 sides together and hold it for the curing period.

fine cast:
I have made casts using a thin "painting" of straight silicone
caulking that i let harden for 24 hours, and then follow the fast cast procedure.
this ensures a better surface finish on the casting.
make sure that the thin coat is thin!
This is great if you make a glow in the dark outer coating! (using glow pigment)

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