Double twist is a major breakthrough in the twisting machine. Without this invention, there is no current twisting machine.
The spindle of the double twister is completely different from the ordinary spindle. It is more complicated than ordinary spindles, such as twisting discs, storage drums, tensioners, etc., which are not available in ordinary spindles. Of course, it also uses parts of ordinary spindles such as spindles, spindles, spindles, bearings, and so on.
The double-twisted spindle is made up of the above two types of components, and its structure is complicated. The complicated structure brings great difficulties to the maintenance operation, especially the artificial production of the head is time-consuming and labor-intensive. The time of each joint is 2 to 3 times that of a normal ring, sometimes even longer. This is not a problem for filaments (especially cords) because the filament break rate is very low. For short fibers, it is fatal and has become one of the reasons that affect the large-scale promotion of double-twisting machines.
