The machines were bought from Rothenberger, Wegener’s authorised distributor in South Africa, at a cost of more than R500 000.
VJL’s new machines have allowed auto- mation of several manual processes. Butt welding operations that were previously outsourced are now carried out in-house.
End products comply with the most rigorous of world standards, placing the company firmly alongside other plastics industry leaders in terms of quality and capability.
The Wegener SM 340 welding machine is designed to guarantee absolute table synchronisation, delivering misalignment free welds by means of a parallel travel mechanism that ensures even pressure distribution over the entire length of the weld, even under conditions of severe machine usage.
Wegener developed its patented mechanical synchronisation system as the technical prerequisite to be used in conjunction with composite machine construction to achieve quality assured welding according to DVS 2208 1 standards.
Perfect weld alignment cannot be achieved by any machine without it.
Process controls use pressure gauges and temperature controllers to set the user’s weld requirements, delivering a linear weld pressure build-up and extremely short changeover time.
The operator can disregard any forces that would normally affect the welding, such as the material tension present in cylindrical tanks and very long sheet plastic bending under its own weight. An automatic sheet rolling device allows just one operator to roll sheets up to 40 mm thick, avoiding the dangerous and time-consuming use of manpower for this task.
The clamping system allows for easy movement of the clamping beams to change the distance of the nonrotating clamping feet in relation to the inner table edges.
Such a system allows thin materials to be welded without misalignment, while allowing sufficient space to form a weld bead on thick materials.
VJL Manufacturing’s second machine is a Wegener BM3O1 bending and edging machine for thermoplastic sheets up to 20 mm thick.
The heating device on this machine comprises steel contact heating swords that can be shifted manually on hardened steel shafts to achieve an adjustable bending angle of up to 110