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Aluminum
molds are most commonly used
for the manufacture of low pressure
urethane parts. The molds are
CNC machined from billets of
aluminum.
The complexity and size of the
mold is dependent on the part
design and whether there are
any inserts for the urethane
to be molded to.
The molds will last for thousands
of cycles so do not typically
need replacing through the life
of the part. |
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Soft
molds are typically used for
prototyping parts.
These molds are made using a
master part, either an existing
part which wants to be switched
to urethane or a new rapid prototyped
ABS plastic part. The master
part is set in a fixture then
covered in urethane to make
the negative cavity.
Once the urethane is set the
mold can then be used to make
the prototype part. Due to the
very economical cost to produce
these molds for prototyping
of parts their tool life is
limited to 100 parts. |
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