Desmet Engineering

Central unwinding machine


The challenge: design and realise a solution for an existing vinyl unwinding machine.
Wrinkles were created in the vinyl because the existing unwinding machine forms loops between the two rollers.
Our customer required a solution to this problem.
After investigating the problem at the customer's site, we recommended fitting two expansion couplings to the existing unwinding machine. One on each side so that the roll could be incorporated in the tube and thereby making it superfluous. The expansion couplings are driven so that the roll is unwound centrally. This makes it impossible for a loop to form and so produces perfectly wound vinyl. Rolls of up to 5000 mm long and with a maximum diameter of 700 mm can be included. The rolls weigh 1100 kg. The unwinding speed is controlled as a function of the diameter of the roll.