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Despatch Split-Zone oxidation oven reduces cycle times by nearly 35%

News International-French

17 Aug 2016

Initial customer evaluation of the Despatch Split-Zone oxidation oven has just been completed. Tests were conducted using premium grade fiber running through a single oven that simulated multiple zones.

The baseline to achieve the target density was 5 zones with a dwell time of 67.3 minutes. Using the Split-Zone the target density was achieved in just two zones with a dwell time of 44 minutes, a reduction in cycle time of nearly 35%.  

“Cycle time reduction is one the most important advancements that customers are demanding,” said John Stafford, Carbon Fiber Business Development Manager at Despatch. “A reduction of thirty five percent will significantly improve the viability of using carbon fiber for automotive manufacturing.”

Oxidation consumes the most energy, has the largest factory footprint, and is the largest capital investment in a carbon fiber line. Improvements to this step have a major impact on the cost of carbon fiber. Elimination of variance along with split-zone control allows the temperature in the oven to be pushed higher overall and by as much as 10⁰C in the upper zone which results in reduced oxidation cycle time. Because each oven is now split into two zones, the number of ovens required to properly oxidize the fiber can also be reduced. In the test that was just concluded the number of ovens required was reduced from five down to just two.

“We were aiming for a twenty five percent reduction in cycle time,” said Mark Stiyer, Director of Engineering, Carbon Fiber at Despatch. “The results from this initial test prove that we can easily exceed that goal and may be able to approach a fifty percent reduction.”