Belt for yarn twisting

Abstract

A yarn twisting belt formed in an endless loop that ensures longer service life of the belt and stable quality of the yarn, comprising a surface rubber layer 1 that touches yarn to be twisted and a reinforcing layer 2 that is laminated on the surface rubber layer 1, having an intermediate woven fabric 3 provided on the surface rubber layer 1 side of the reinforcing layer 2 while a seamless woven fabric is used as the intermediate woven fabric 3. The seamless woven fabric is elastic in the direction of the belt circumference and rigid in the direction of the belt width. The reinforcing layer 2 comprises the intermediate woven fabric 3 that is constituted from the seamless woven fabric, a core layer 4 constituted from core yarns embedded in the longitudinal direction of the belt, and an external woven fabric 5 that is put on pulleys, while being integrated with the surface rubber layer.

Description

technical field [0001] The present invention relates to a twisting belt used in a synthetic yarn pre-twisting device, and more particularly to a twisting belt for pre-twisting a yarn between two twisting belts that cross each other and run in opposite directions. Line with belt. Background technique [0002] A general twisting belt is composed of a surface rubber layer in contact with the twisted threads and a reinforcing layer laminated on the surface rubber layer to increase the strength of the surface rubber layer, and is formed in an endless shape. The reinforcing layer is composed of an intermediate woven fabric arranged on the surface rubber layer side, a core layer in which a core wire as a tension body of the belt is buried along the circumferential direction of the belt, and an outer woven fabric in contact with the pulley (for example, patent Literature 1). The woven fabric on both sides of the core layer is used to prevent the core layer from splitting along the...

AI Technical Summary

Problems solved by technology

However, since woven fabrics are less rigid than woven fabrics and have higher stretchability, there is a problem that the concave warpage of the belt is large.

[0006] In general, if the warpage of the twisting belt is large, the thread will be held by the edges of both ends of the belt, so it will be in a state of being dragged by the edge, and the thread will be easily worn, so a large amount of warping will occur. The thread shavings or thread breakage will reduce the quality of the thread

[0007] On the other hand, if the convex warp of the twisting belt is large, the thread is easily clamped near the center of the belt, so the state of the clamped thread is likely to be unstable. Therefore, the thread swings on the surface of the belt and is prone to occur. Partial wear of the belt, burning of the belt due to local heat, shortens the life of the belt, and also tends to make the twist uneven

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