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High-volume molding methods
Compression molding is a high-volume thermoset molding process that employs expensive but very durable metal dies. It is an appropriate choice when production quantities exceed 10,000 parts. As many as 200,000 parts can be turned out on a set of forged steel dies, using sheet molding compound (SMC), a composite sheet
Read MoreCritical fiber sizing
To achieve desirable properties in composite components, adhesion between fiber and matrix must be optimized. Adhesion requires sufficient saturation with resin (wetout) at the fiber/matrix interface. To ensure good adhesion, attention must be given to fiber surface preparation, such as the use of a surface finish or
Read MoreFabrication methods
The most basic fabrication method for thermoset composites is hand layup, which typically consists of laying dry plies or prepreg plies by hand onto a tool to form a laminate stack. Resin is applied to the dry plies after layup is complete (e.g., by means of resin infusion) or, in a variation known as wet layup, each
Read MoreHigh-performance fibers
High-strength fibers used in advanced composites include not only carbon, glass and aramid, but high-modulus polyethylene (PE), boron, quartz, ceramic, newer fibers such as poly p-phenylene-2,6-benzobisoxazole (PBO), and hybrid combinations, as well. The basic fiber forms for high-performance composite applications
Read MoreResin matrices: Thermoset or thermoplastic
Polyurethane resins are available in both thermoset and thermoplastic formulations. Thermoset polyurethanes are used to pultrude tough new parts, such as marine sheet piling and electrical power poles, and to enhance the rigidity of automotive bumper fascias made by reaction injection molding (RIM; for information
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Fabric Forms Get Sophisticated
Closed molding applications and demand for greater design flexibility are driving fabric suppliers to create a variety of products that mix and match fibers, fiber forms, core and resin.
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Composite rigid inflatable boats adapt for hard work, safe play
Glass, aramid and carbon fiber composites reduce weight and enable modular design and construction of these versatile RIBs.
Read MoreComposites Polycon 2007 Preview
The annual ACMA/ICPA exhibition and conference revisits the Florida coast with expanded educational and networking opportunities.
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Inside Manufacturing: 45,000 Fan Ducts Per Year from RTM
Unique tooling technology optimizes closed molding process efficiency for volume production of industrial part.
Read MoreParis Air Show review
The biennial aircraft showcase confirms composites as an established,permanent presence in commercial aircraft construction.
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