Duct pipes in heavy PVC-coated textile for ventilation

We designed a machine that welds continuously and directly from the roll. The fabric is fed into the machine by 3 motorized unwinding stations with automatic edge correction and digital fabric tension control, folded over several A-frames, then welded into a tubular shape by multiple high-power welding heads. Simultaneously, other welding heads apply PVC strips with eyelets on top of the tubes, used to secure the tube to the ceiling of the mine tunnels. Another A-frame folds the thus created tubes to a maximum width of 1,2 m. Once the product reaches the programmed length, a cross cut is made, and the tube drops into a steel crate ready for transport.

Reduced cycle time. Continuous monitoring of welding quality.

With our machine the hourly production output increased from 12 meters up to 70 meters.

Multiple bridges over the machine and easy access to all welding and cutting tools allow the operator to continuously monitor the process and – if necessary – intervene. A welding platform installed behind each motorized unwinding station allows attaching the end of a previous PVC roll to the start of the next roll so that the production can continue without being interrupted when a roll is finished.