Beam winder with yarn shrink system
View Patent ↗An apparatus and method for winding a sheet of aligned parallel yarns onto a beam is described. The beam winder utilizes a circularly arced yarn spool rack that feeds each yarn to an alignment comb through associated guide tubes. The distance between each spool of yarn and the alignment comb is substantially the same for all spools of yarn, thereby equalizing the force necessary to pull them to the comb. Next, the aligned sheet of material is preshrunk using heated rollers and wound onto a beam. Multiple speed controlled stepper motors are utilized to maintain a constant low level of tension in the sheet during the shrinking process. After shrinkage, the tension level of the yarn sheet is increased as it is wrapped onto the beam. A turntable that supports two or more beams is provided to facilitate the rapid switching of beams once one beam has become full.
1. A beam winder comprising:
an alignment means for aligning a plurality of continuous yarns in a parallel planar relationship;
a shrink means for (i) receiving the aligned planar yarns from the alignment means, (ii) applying a first tensioning force to the aligned planar yarns and (ii) shrinking the aligned planar yarns;
a winding means for (i) receiving the aligned planar yarns from the shrink means, (ii) applying a second tensioning force to the aligned planar yarns and (iii) winding the aligned planar yarns onto a beam, the second tension force being greater than the first tension force; and
a tension isolating means for preventing the transfer of the second tension force from a portion of the aligned planar yarns in the winding means to another portion of the aligned planar yarns in the shrink means.
2. The beam winder of claim 1 , wherein the shrink means comprises (i) one or more motor-driven rollers for pulling the aligned yarn sheet through the shrink means.
3. The beam winder of claim 1 , wherein the alignment means comprises a comb, the comb having a plurality of openings passing there through, each opening being spaced from each other opening in one direction.
4. The beam winder of claim 2 , wherein the shrink means further comprises a pneumatically biased dancer roller to tension the aligned planar yarns.