Specialized carbon multiaxial machines have two methods of forming carbon layers before stitching. They either feed the rovings from bobbins on a creel or feed a “pre-spread” carbon fibre tape.

The spreading is made offline, at a separate line where rovings (bobbins) are fed to a spreader machine, which spreads the rovings to achieve certain areal weights. This spread tape is wound as a roll and later fed to the carbon multiaxial machine.

Spread delicate carbon layers in the roll have the risk of entangling with each other, which could make the process problematic. For this reason, the spread tapes are wound with a paper layer in between them. This paper is taken out and rolled to a paper tube while feeding the tape to the multiaxial machine. Sadly, it goes to thrash since it is not reusable because of the misaligned edges (telescopic effects), loose tension and fiber dust/residue.

A good-sized carbon multiaxial machine runner consumes a large volume of paper, which becomes a consumable and a significant cost for the operation.

Addressing this problem, BTU-TECH has developed a “Paper Rewinder” which takes a poorly wound used paper roll and rewinds it into almost original form to become “reusable.”

This fully automatic machine takes the unusable paper roll and rewinds it with very high speed while adjusting the original tension.