Causes And Solutions Of Several Ill Formed Packages

Chrysanthemum core cheese

The outer yarns are subjected to a greater pressure on the inner yarns, and the yarn layer is extruded, forming a "chrysanthemum core" in the area close to the paper tube.

　　 1, several factors that produce chrysanthemum core cheese

A, soft properties of yarn.

B, coarse yarn varieties

C, higher yarn reversion.

D, when yarn elasticity is higher.

E, rotor spinning

F, wool spinning and so on are more likely to produce chrysanthemum core.

2. Cause and solution of chrysanthemum core cheese

When the yarn tension is small and the contact pressure is not suitable, chrysanthemum core is easy to produce. The winding tension should be increased and the contact pressure should be adjusted.

The paper tube is highly eccentric and easy to produce chrysanthemum core, so the use of unqualified paper tubes should be avoided.

The contact surface between the paper tube and the grooved drum is poor, and the chrysanthemum core is easy to generate. It can correct the relative position between the small end of the paper tube and the groove tube (there is a certain gap between the bobbin and the left side of the contact surface of the grooved drum, and the core of the bobbin will be softer after being rolled up).

When the yarn moisture regain is high, chrysanthemum core is easy to produce.

Too much increment in winding will cause chrysanthemum core cheese.

Convex edge bobbin

With the increase of the winding diameter of the bobbin, the contact pressure of the bobbin on the grooved tube increases, and the winding density of the yarn increases, which causes the inner yarn of the cheese to be compressed and extruded from the side side to form a convex package.

　　 1. The cause and solution of the convex package.

A, coarse yarns, double strands, elastic yarn and bulky yarns are liable to cause such poor forming.

B, for the above elastic yarn, the tension is too large and the contact pressure is too large.

C, try to use tension and contact pressure decreasing device to solve.

Spoon layer cheese

1. Formation and harm of disorderly yarn layer

During the high speed winding process, the yarn slips slightly, causing the yarn layer to occur. The slight slip symptoms of this yarn layer are ring breaking, yarn adhesion, disorderly yarn in the cheese, broken ends for unknown reasons, yarn breakage and so on. The spool of the spool yarn is different from the spoon yarn, and the symptoms in the back way of the cheese are different.

　　 2. Cause and solution of disorderly yarn layer

Due to the excessive suction and negative pressure, the gauze layer can be reduced, and the machine with negative pressure and no suction motor frequency can be properly reduced.

In the process of single spindle knotting, the large suction nozzle touches the cheese to cause the gauze layer to be broken, and the distance between the big suction nozzle and the bobbin needs to be adjusted. The recommended interval is: 4~5 mm in diameter of 120 mm.

Because of the twisted yarn formed by repeated knotting, the quality of twist is adjusted and the maintenance of single spindle is done well.

Due to the low contact pressure and excessive friction, the contact pressure of the bobbin can be increased properly (the inverse pressure ratio is proportional to the contact pressure of the bobbin).

The opening and closing time parameters of the anti overlapping motor can be adjusted by the gauze layer formed by the overlapping of the yarn layer.

The yarn is more slippery and less moisture regain. When the single spindle is knotted, the large suction nozzle and the cheese will be separated for an hour. The contact pressure and air humidity (65%-70%) of the bobbin can be properly increased, and the parallel spacing and negative pressure of the large suction nozzle and the bobbin can be optimized.

When spinning tension is reduced or disappears at a certain time, a short time period is easy to produce a yarn winding layer. We need to maintain, clean the tension system and strengthen site management.

The yarn with high friction coefficient, brittle fiber and easy accumulation of static electricity is easy to create a yarn winding layer, which can optimize the speed, tension and cradle pressure, and appropriately increase the air humidity in the production environment.

The winding speed of the bobbin is too high to create a yarn winding layer, and the winding speed can be reduced properly.

Cobweb yarn (also called cross side or climbing head) cheese

On the left or right side of the cheese, the yarn is thrown out to form the spider web. See photo:

　　 1. Causes and solutions of cobweb yarn package

Because of the small contact pressure of the tube yarn and the excessive slip between the groove and the cheese, the contact pressure of the bobbin can be increased properly.

The paper tube is seriously eccentricity or the relative angle of the contact surface between the paper tube and the grooved drum is too large, resulting in the jumping of the yarn during the operation of the yarn, resulting in the spider web yarn.

The groove of the groove is damaged or not smooth, and the cobweb yarn caused by rust point and cotton wax can be repaired or replaced.

When the yarn tension is too high to deviate from the standard setting, sometimes there is no time and large time, the spider web yarn should be re optimized and set the yarn tension. Setting the strength value according to the 8%-12% strength of single yarn, find out the cause of the tension fluctuation.

Because of the poor operation of the cradle cradle or the looseness of the cradle, the chuck can be replaced and the cradle is repaired.

The cobweb yarn caused by overlapping winding can optimize the setting of the anti stacking parameters of the groove.

The cobweb yarn, especially hemp and acrylic fiber, can be properly increased due to the low humidity of the air in the production environment.