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New expanding, multi-bladder shaft for counter-roller tissue rewinding machines delivers better energy efficiency, tissue production and operator control precision
The Italian technology company Svecom-P.E. has introduced a new patented expanding shaft made entirely of carbon fiber, CF. The new multi-bladder expanding shaft has three ledges and offers mechanical properties which are unique in the market. A major benefit of the new CF shaft is that it now lets operators exceed the usual speed limits for 3’’ core diameters on tissue rewinders, thus allowing them to run at mechanical speeds of over 1200 m/min.
Reach operating speeds four times faster
The new 100% CF multi-bladder expanding shaft has been specifically designed to meet today’s higher technical requirements on counter-roller rewinding machines. This makes it possible to get very fast acceleration and deceleration times and also reach the operating speed much earlier than traditional shafts. Operating speeds are reached four times faster compared to traditional shafts, consequently increasing the overall productivity.
The light nature of carbon fiber also allows much higher maximum operating and peak speeds, with no vibrations from the shaft while achieving them. Critical speeds increase significantly: +80% compared to steel shaft, +39% compared to aluminium shaft, +19% compared to carbon shaft with aluminium sleeve (Fig. 1).
Lower weight gives benefits too
As a further benefit, carbon fiber shafts have a lower specific weight, thus reducing the energy required to operate them in the machine. The specific weight is 65% lower than steel shaft, 20% lower than aluminum shaft and 32% lower than a carbon shaft with aluminium inserts (Fig. 2)
A higher elastic module also gives greater stiffness and consequently, upon application of a high load, it will undergo minimal deformations.
The 100% CF expanding shaft represents a real revolution for such expandable systems and is an innovation based upon Svecom’s lengthy experience with these materials, as well as close collaboration with a leading company in the carbon sector for military and sports applications. The 100% CF solution allows a wide range concerning the geometry of shafts, and therefore the ability to satisfy the customer’s needs.