Ogle Models & Prototypes (www.oglemodels.com) was recently appointed to
produce prototypes for a thermal imaging camera that will ultimately be
used in search and rescue operations. From the CAD model, OM&P used
stereolithography to produce the external components and to create the
moulds; vacuum castings were subsequently produced in various colours.
Making use of its newly installed EOSINT P380 laser sintering machine
from Electro Optical Systems, OM&P used the laser sintering process to
make the all-important chassis that supports the thermal imaging screen
and electronics. In this case, polymide powder was used, and the
component went through several inexpensive design iterations to
accommodate electronic components coming from a variety of suppliers.
While full tooling was required for the majority of the plastic elements,
the chassis actually went into production using the laser sintering
process. An exploded view of the assembly is shown here; the chassis is
the second component from the right.
Compared with its existing P360 machine, OM&P's new P380 provides better
surface finish and a 15 to 30% faster build time, depending on the
component. Part accuracy is also improved, resulting in better surface
definition and reduced wall thickness.