3D printing fixtures to hold things you've 3D printed can be done the same way.
Put two cubes side by side with a bit of gap between. Position the object at
the divide so that it's half embedded in each cube, with no undercuts. Subtract
the object from both cubes. Print the cubes and you have blocks to clamp in a
vise to hold the object for more operations like drilling, tapping, pressing in
threaded inserts etc.
On Friday, March 19, 2021, 10:53:55 AM MDT, Chris Albertson
<albertson.ch...@gmail.com> wrote:
When I first saw this, my idea was to print the internal tooth gear
"backward" as a mold that makes up the central space in the aluminum
housing, then pour in an epoxy/glass composite paste.
I've seen this done on other projects, the most complex is a prosthetic
hand I'm slowly working on. The designer made the "finger bone" in 3D
printed plastic, then you put it inside a hollow 3D printed mold and pour
in polyurethane resin which "over-molds" the plastic core. It makes a
very tough non-slip fingerpad. Seeing this got me thinking about what I
call "hybrid design" what you combine 3D printing with metal and resin
casting. It sounds complex but if you have a 3D CAD system and a printer
mold-making is nearly trivial, Use the part you want to make and subtract
that from the inside of a brick.
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