Thermoplastic Polishing

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Thermoplastic Polishing
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Thermoplastic Polishing
This small polyamide, thermoplastic resin,
hardened part had a rough surface finish as well
as flashing that needed to be removed. The
challenge in deflashing and polishing plastic
parts is to choose a media that will be
aggressive enough to remove enough material to
create a smooth finish without scratching or
etching the surface too much so that the part
can be polished successfully.
Before
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A two-step process was used to first de-flash the
part and then polish the surface. The first step
involved vibratory tumbling with a Precision
Ceramic Fast Cutting Sphere to remove the flash
and smooth the surface. This shape and bond
(formulation) of media provided good cutting
action (deflashing and edge rounding) but not
the rough, tumbled finish normally associated
with angular shaped media. The part was then
polished with a Precision Ceramic Polishing
Sphere. Again, this shape provided the best
polishing action and left the part with a
near-mirror surface.
After
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