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Silicone
tooling is the one of the most popular process in rapid
prototyping. |
An
accurate master is usually created through 3D printing, although
any component or model can be used.
The silicone tool takes an exact replica of the master pattern;
even a fingerprint will be picked up. The master is then set into
liquid silicone rubber, which when cured can be cut open to remove
the master model leaving an accurately formed cavity.
The
cavity can be filled with any one of a wide range of polyurethane's.
The polyurethane sets and is removed from the tool, thus creating
a prototype.
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Benefits
The biggest advantage of this process is the variety of polyurethane's
available. One can be chosen to simulate the properties of production
materials such as ABS, Nylon, Polycarbonate or Rubber. Almost any
colour is available.
Making prototypes with this process is extremely valuable because
it means that they can be used for things such as mechanical experiments
and test marketing.
Costs
Costs
vary depending on whether you need to have a master made up, the
surface finish required, the size of the part, and the prototype
material you choose.
The general price range for this type of process is between $500
and $4000 set up, then a small charge (between $30 - $150) for
each part produced. Note: the typical life of a silicone tool
is less than 30 parts.
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