Fused deposition modeling utilizes a few molding materials. All Stratasys
machines use ABS plastic. Higher-end models are also equipped to use ABSi,
Investment Casting Wax, and Elastomer. These materials are used because
their melting point lies within the temperature range that Stratasys machines
heat their filaments to. Each of these materials presents certain advantages
over the others.
- ABS plastic is very high strength and corrosion resistant relative
to its cost. Once a part is produced using this material, it can be
sanded, drilled, or otherwise manipulated to improve its finish and
fit without compromising its strength. Its resistance to corrosive
chemicals and heat also allow it to be used in conditions where many
other materials might fail. ABS plastic has the added bonus that it
can come in a variety of colors to fit any atheistic requirements
as well.
- ABSi plastic provides greater strength and resistance to corrosion
than regular ABS plastic. It can be used in even more demanding conditions
and is frequently used for medical parts as it can be sterilized by
chemicals or even radiation without sustaining damage.
- Investment Casting Wax is used primarily to make casts. Its advantage
in this task is its smooth finish which translates to a smoother part.
Also, its chemical properties allow it rapidly de-wax from a shell.
- Elastomer provides strength and durability while still allowing
for flexibility. It is best used in prototyping tubes, hosing, seals,
and impact-absorbing parts.
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