Design News Exclusive:
A Vermont
company is launching a major effort that could put carbon fiber compounds in
the driver's seat for auto design. The move coincides with declining demand for
carbon fiber composites in aircraft and stability in carbon fiber costs.
"The target of our research is to take us from 7,000 vehicle
sets a year to 50,000 or 60,000 a year," says Gary Lownsdale, engineering
manager for Plasan Carbon Composites
of Bennington, VT. The company opened this year a new
R&D center aimed at significant improvements in both process and materials
technology.
"We're getting down and really trying to understand what
happens in the curing process so that individual resins can be tailored for the
process," says Lownsdale. The goals are to boost productivity, a chronic
problem for any type of thermoset curing process, and to improve surface
quality. The Plasan unit is the global leader in Class A surface carbon fiber
parts.
Lownsdale says Plasan is trying to develop a new
process that could make carbon fiber composites for automotive with
thermoplastic resins. That would be an industry first, and require a new
low-pressure process technology. Injection molding would not work. Composites
are loaded with more than 50 percent levels of carbon fiber and their exact
orientation is critical.
Big developments are coming in structural car parts made
with carbon fiber composites, says Lownsdale. Examples are energy management
systems, load floors, battery compartments and chassis components.
New automated assembly processes being tested now by Plasan
are expected to yield better economics for carbon fiber composite components.
One of the big areas of development is in computer
simulation. "We've found you can't go to one place and buy an off-the-shelf
design guide for carbon components," says Lownsdale. "All of the pieces are out
there. It's just that they haven't been pulled together and put in one place."
Plasan is working with other companies actively developing carbon fiber
composites, including those that make aircraft and wind turbine components.
The money for Plasan's development is coming from its parent
in Israel,
which produces military components made of carbon fiber.
A special grade of carbon fiber is made for automotive
applications. For one, the resins are faster curing, allowing higher
throughputs. "Also, you have to pay attention to dynamic conditions, as well as
crush and energy absorption," says Lownsdale. "Often in aerospace, they're
happy if they can do two parts a day. We need to do 200 sets a week."
Plasan had three finalists in the most recent
SPE Automotive Awards competition. Those parts were for special effects on
sports cars, such as spoilers. The new developments target fundamental car
applications.
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