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Utilizing
low pressure, high flow resin systems will allow an SEMC part
to be manufactured similarly to an autoclaved laminate. This
methodology permits the use of a one sided soft tool. This
saves both the long lead time and expense associated with
a steel compression mold.
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Techniques
developed at Pratt & Whitney AutoAir have resulted in
prototype parts that have mechanical properties that are 85%
- 95% of the production compression molded part. In some cases
the properties of the low pressure version exceeded its production
counterpart.
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The
low pressure prototype method will also accommodate a part
geometry that is not conducive to classical compression molding
such as undercuts and low drafts.
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