QUICK SOFT TOOLING:
One way is starting with a
?Master?. This can be an ?SLA? part, a machined
part from plastic or metal, or a part the client
has made.
Silicone or urethane can be
poured around the master, cured, then the master
removed, leaving a cavity that is the exact
impression of the master. If multiple molds are
needed, the master can generally be used several
times to generate several molds.
Urethanes or silicones are then
poured into the mold, cured, then removed and
can be post processed which can include
finishing and painting, or post-machining.
The life of the mold (how many
parts that can be cast before the mold begins to
deteriorate) will depend on the geometry of the
part and the materials used in the casting of
it.
ACRYLIC TOOLING:
For more durable tooling, when
tight tolerances need to be kept and when a 3-D
model is available for the geometry, the mold
cavity can be directly CNC Machined into
acrylic. Depending on the geometry of the part,
many cavities may be able to be machined at the
same time, often called a gang mold. Again,
silicone or urethane can be injected into the
mold, producing many cast parts quickly.
Direct-Machined-Acrylic Molds
are a cost-effective alternative when injection
mold tooling can?t justify the quantity of parts
needed, as for Short Run Production (tens,
hundreds or thousands of parts) or as an interm
step when waiting for high production methods to
tool up.
VACUFORM / THERMOFORM MOLDS:
There are several choices for
Vacuform or Thermoform Molds, depending on the
geometry of the part, material that is going to
be vacuformed and the quantity of parts that
will be pulled.
Molds ca be quickly CNC-Machined
from a range of materials including MDF, Tooling
Foams or Aluminum. This is a good process when
doing Prototype parts and Short Run Production
orders of tens, hundreds or low thousands of
parts.
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