Look into using plaster impregnated gauze strips. They used to be used for
plaster casts on broken limbs. They're now used by sculptors (like me) for
a variety of quick, sturdy mold procedures. The strips are available in a
variety of widths from rolls of only 2 inches to full sheets.
The strips are cut to manageable lengths, dipped into water, pulled through
the thumb and forefinger to remove most of the water, then placed against
the surface and rubbed with a finger to help fill the voids between gauze
Successive strips are layered over others, building as thick as necessary.
(I rarely need more than 3 layers.) It's also possible to brush plaster
over the last layer to strengthen it a bit more. Finally, if additional
stiffening is necessary to prevent warping, the mold can be strengthened
with rods attached with the same gauze
You can find the "plaster gauze" in art and medical supply houses. I can
give you specific sources if you wish.
Rob Browne, sculptor
75 Arbor Road
Menlo Park, CA 94025
> From: <email@example.com>
> Date: Mon, 2 Apr 2001 15:21:36 -0500
> To: firstname.lastname@example.org
> Subject: Scanning an aircraft
> Hi everyone,
> We have a project where we need to get 3D data of an aircrafts surface in
> specific, small areas. Our intent is to plaster cast the surfaces and then
> have them laser scanned for CAD use. Works great on the top facing
> surfaces, but gravity is working against us in the down facing surfaces. We
> have considered laser scanning the aircraft itself, but this requires a
> steady, stationary structure to be built because some of these surfaces are
> quite high off the ground. Does anyone have any suggestions as to how we
> can take castings of these surfaces or scan them directly off the aircraft?
> Wayne Foss
> Materials & Process Engineer
> Rockwell Collins, Inc.
> Cedar Rapids, Iowa
> For more information about the rp-ml, see http://ltk.hut.fi/rp-ml/
For more information about the rp-ml, see http://ltk.hut.fi/rp-ml/
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