Polar winders

Figure 13.5 Tumble winder, a variation of the polar winder, is specifically designed to produce small-scale spheres and tanks at very high speeds (courtesy of Engineering Technology, Inc. ENTEC )...

Fig. 3.3 The liquid crystalline spinning process of well-aligned nanotubes fibers in glycol, a The schematic of the experimental setup used to make nanotubes fibers, b Optical image of 3 wt% MWNT suspension before extmding under crossed polarizers, c A 3-m-long MWNT fiber collected on the small winder. Reproduced with permission from [65]. Copy right 2008 Wiley-VCH...

Another type is known as the orbital, or racetrack winder, where the winding heads move completely aroimd the mandrel, as shown in Figure 21. It is used primarily for rocket motor cases and where polar winding is desired high speed is attainable. 

In the tumble-type winder (Fig. 22), the mandrel is tumbled end over end during a polar wind, whereas the feed eye is traversed and the mandrel rotated in the normal lathe-type fashion for helical or circumferential winds. This type is widely used for high volume commercial products such as water-softener tanks and pool filter tanks. 

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