Carbon Fiber Oxidation Ovens
Oxidation is the most critical step in the production of carbon fiber and Despatch provides the world’s leading
oxidation technology. Since oxidation is an exothermic process, uniform, consistent airflow to uniformly remove
heat from all tows across the web is a critical success factor.
Center-to-ends airflow provides optimal temperature uniformity resulting in consistently oxidized density across
the entire tow band. A uniform airflow over the tows allows the process to be operated closer to the “exotherm”,
increasing the chemical reaction rate. Consistency of process results in no skinning (uncured core) and more
uniform densification across the entire tow band. Center-to-ends airflow provides for up to 30% faster rates of
oxidation than conventional cross flow or vertical down flow oven designs.
- Air moves parallel to the fibers
- With conventional airflow technologies the non-uniform
end areas are substantial. By using the Despatch center
to ends airflow technology we are able to greatly reduce
the non-uniform end areas. This extends the active
heated length by up to 25%.
- The oven operates at consistently higher temperatures
without reaching uncontrolled exotherm.
- Consistent process conditions with uniform temperatures
in the working zones ensures higher yields of as much
as 30% and uniform oxidized density fiber
- Center-to-ends airflow design can increase line speeds
and fiber throughput, without sacrificing fiber quality.
Despatch oxidation oven size can be scaled from 400MM
band width up to 4200MM band width and can process
1k to 320k tows with no loss of uniformity. Despatch
oxidation ovens consist of zones that can be vertically
stacked to reduce floor space requirements.
Energy efficiency is improved by preheating fresh air and recapturing heat exchange through abatement. New
patent pending ACER Technology is an option that reduces energy consumption, controls and balances the air in
the process chamber and reduces tar contamination. Patented, automated adjustable end louvers close to significantly
reduce heat loss and open for fast and easy threading. The Despatch design eliminates direct process
chamber exhaust which significantly improves energy efficiency. With these designs, our customers achieve
significant cost savings per kilogram of material output.