Glass fiber cutting method and device for preventing glass fiber from axially traveling

Abstract

The invention relates to a glass fiber cutting method and a glass fiber cutting device for preventing a glass fiber from axially traveling. A glass fiber cutting machine comprises a knife roll, a pressing roll, a rubber roll, a rubber roll pressurizing device, a pressing roll pressurizing device and a continuous long fiber bundle, wherein the rubber roll pressurizing device controls the pressure of the rubber roll on the knife roll and the pressing roll; the knife roll is driven by a power device to rotate; the pressing roll comprises a front pressing roll and a rear pressing roll which are distributed along the feeding direction of the continuous long fiber bundle; the pressing roll pressurizing device controls the pressure of the front pressing roll and the rear pressing roll on the rubber roll; the surface liner speed of the knife roll, the rear pressing roll and the front pressing roll gradually decreases; and the long fiber bundle passes through a clearance between the front pressing roll and the rubber roll, passes through a clearance between the rear pressing roll and the rubber roll and then is fed into the knife roll. The long fiber bundle which is fed into the clearance between the knife roll and the rubber roll is straightened under the action of internal tension force generated by speed difference between the front pressing roll and the rear pressing roll through a damping mechanism, and the influence on stable feeding of the continuous long fiber bundle caused by horizontal traveling of the continuous long fiber bundle on a rubber roll surface in the cutting process of the continuous long fiber bundle is prevented.

Description

Technical field [0001] The invention relates to a glass fiber cutting method and device with a circular cutting element, in particular to a glass fiber cutting method and device for preventing the glass fiber from moving axially. Background technique [0002] Glass fiber cutting machine such as figure 1 As shown, it includes a knife roller 2, a pressure roller 1, a rubber roller 3, a rubber roller pressing device 4, and a pressure roller pressing device 8. The knife roller 2, the pressure roller 1, and the rubber roller 3 are triangularly distributed with each other, and the knife roller 2 Driven by the power unit, it rotates and drives the pressure roller 1 and the rubber roller 3 to rotate. The rubber roller 3 is pressed against the knife roller 2 under the action of the rubber roller pressure device 4 and maintains a certain pressure. The pressure roller 1 is in the pressure roller pressure device Under the action of 8, it is pressed against the rubber roller 3 and maintained ...

AI Technical Summary

Problems solved by technology

During the cutting process of the continuous long fiber bundle, the continuous long fiber bundle is in a free state in the axial direction of each roller, so it walks left and right on the surface of the rubber roller, sometimes in a straight line, sometimes in an oblique line, resulting in different lengths of cut fiber bundles , cannot achieve the effect of fixed-length cutting, and leads to two problems:

[0003] 1. With the increase of the rolling cutting time, the feeding speed of each glass fiber is different due to the wandering of the glass fiber bundle during the feeding process, and some glass fibers are gradually arched between the pressure roller and the knife roller. To a certain extent, the glass fiber bundle will jump over the knife roller and cannot be cut. At this time, it is necessary to stop the operation of the glass fiber cutting machine to manually cut the glass fiber bundle and re-insert the glass fiber, which will affect continuous production;

[0004] 2. Sometimes multiple bundles of glass fibers overlap and cannot be cut, and manual cutting is required, which affects product quality and is unsafe

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