WebJun 17, 2024 · The rolls may be convex or concave and it happens while the rolls are winding. Solution: To avoid, check for machine misalignments, make sure cores are firmly retained during winding and the hardness does not increase during winding, and have a … Roll defects (telescoping, starring, etc.) In both closed loop and open loop, tension … WebUncover the reasons behind roll winding defects and see how you can prevent roll imperfections. The most common roll defects are telescoping, poor starts, baggy or …

Winding : Machines, Mechanics and Measurements - Google Books

WebAug 1, 2001 · Scalloped edges are defined as rolls in which the slit web width increases and decreases during the winding process. This is normally caused by excessive slitter runout, … WebOne example of a roll winding defect is illustrated by a “starred” roll. In the image to the left this defect is illustrated. A roll that becomes starred was produced with low wound in … south west trains new timetable

Common Roll Winding Defects - Paper Rolls - Industrial Physics

WebA defect in paper roll winding that results in a roll with progressively misaligned edges due to slippage of the paper layers. Telescoped rolls (and other roll defects) are the result of inconsistencies in moisture content and thickness produced during … WebAug 1, 2024 · Defect: Collapsing wrinkles vary with the oscillating hauloff rotational position, i.e. bubble position. Symptom: Tilted frost line, frequency of 1 (Fig. 2). Anything that disrupts the cooling uniformity in that same shape is a possibility: volume, temperature or alignment. Web9 Nip Induced Defects Overview Failure Modes Nonuniform Slippage Slippage Gradient Bursts and Crepes - Roll Outside Bursts and Crepes - Roll Inside Unwind Belt Shear … south west trains fleet