A 1 warping fracture closure
1, check whether the guide piece is fuzz.
2. Check whether the sword belt and the sword head are hairy and sharp.
3. Check the warp height
A. Whether the sword head and the sword belt rub the upper and lower warp yarns.
B. Does the warp yarn collide with the sley at 180? When bending the shaft and giving up,
4. Check whether the warp stop device collides with the swinging edge and whether the spring is loose.
B 1 weft breakage and car closing
1, check whether there is a lack of weft on the weft accumulator, and correct the number of weft loops on the weft accumulator.
2. Check whether the clamping force of the sword head is moderate.
3. Check whether the cutting time of the sword head matches well with the scissors time of the weft scissors.
The entry time of sword is 70? ~75? The first yarn enters the edge of the tissue paper.
4. Check whether the tool withdrawal time and leveling time match well, and whether the tool withdrawal time and leveling time are consistent, both of which are 295? ~320? In order to make the rapier head retreat to the first warp yarn at the edge of the fabric at a corresponding angle,
5. Check whether the tension of the weft tension piece is moderate.
6. Whether the falling time of the color selector is too late or too high, whether the let-off rapier reaches the weft, and whether the weft is located above the rapier head and cannot enter the jaw. If there is such a problem, it is necessary to adjust the height of the weft selection lever, rotate the loom to reach the yarn clamping position, and check whether the yarn clamping position is correct.
7. Check whether the rapier head is deformed and inclined.
8. Check whether the sword belt is seriously worn, so that the gap between the sword belt and the guide rail is too large, and the sword belt moves unsteadily and jumps up and down.
9. Check whether the elastic force of the gripper head is insufficient or improperly adjusted.
Check whether the weft can't slip out of the jaw after the rapier head enters the shed. When the loom rotates until the weft rapier just enters the weaving shed, check whether there are sundries in the jaw and pull the weft by hand. If it is easy to fall off, adjust the clamping force of the jaws.
10, check whether the cutting time of weft scissors is too early, usually at 75? ~80? At the same time, the weft has been cut before it completely enters the gripper of the weft feeder, so the expansion force of the weft is reduced and it slips out of the gripper.
1 1, check whether the weft insertion error is caused by too small tension.
12, check whether the handover of sending and receiving swords is good. Turn the loom to position 180.
Check whether the position of the sword head is correct, and push the sword belt by hand to check its movement.
13, check whether the sword head jumps at the joint on both sides due to uneven guide rail.
14, check whether the rapier wheel and rapier belt eyelet are seriously worn. The position of the sword head is unstable and the handover is poor.
15, check whether the weft yarn slips from the jaw due to the wear of the jaw before being pulled into the shed.
16, check whether the opening time of the gripper is too late or the tail of the rapier is too long, and the weft is broken by the spring gripper when weft is inserted again. The reason is that the new yarn head can't always be clamped tightly, and it will slip when picking up the weft again.
17, half-width or full-width fabrics have double weft due to:
1, the scissors are not sharp, which causes the weft yarn to break. 2. The weft feeder is clamped too tightly or the weft clamping spring is clamped too tightly, and the weft insertion sword cannot exceed the weft, resulting in handover errors. 3. The timing of scissors is not right, and the weft is pulled into the shuttle by the weft feeder. Generally, after the scissors are ground, they should be removed for grinding or replaced with new blades.
18, check whether the sword belt and guide rail are worn or loose. Whether the handover error is caused by vibration during driving. If it is badly worn, it will sometimes damage the sword head. Usually, the rapier belt and guide rail are easy to wear, and the entrance and exit of the weft feeder sword wear the fastest.
19, check whether the sword picking is low, and the correction method of this phenomenon: pad paper at the front of the sword picking to correct it.
20. Check whether the rubber plate and the sword belt on the sword head are worn. If the two sword belts are worn but can still be used, new sword belts and rubber plates on the sword head can be replaced to reduce error accumulation.
2 1, check whether the handover time of the two swords is consistent. If not, please correct the 0 file.
22. Check whether the eccentric wheel is loose. The method is: pull the active sword wheel hard and observe the looseness of the eccentric wheel.
23. Check whether there are about 15mm~250mm extra weft yarns in the normal tissue near the right yarn. The root cause is that the weft insertion length exceeds the set length. Make the tail weft on the right side of the cloth too long, and bring it into the shed when the weft insertion sword picks the weft next time. The reasonable weft length is about 20 mm, which causes the weft tail to be too long: 1, the weft insertion force is too small and the fixed length is too long. 2. Scissors are cut too late. 3. The sharp blade is not sharp. 4. The release time is too late.
24. Check whether there is a lack of weft in the tissue near the right side of the fabric. The reason for this defect is: 1. Weft tension is too high. After the weft insertion sword releases the weft on the right cloth edge, the weft will rebound under the elastic recovery, resulting in the shortage of weft. 2. The installation of the right release cam is too inward, resulting in premature release. 3. The shearing time of scissors is too early.
C, several reasons for broken edge parking:
1, the sword wears.
2. The temple thorn ring is poorly installed.
3. Too many heddles are squeezed by selvage.
4. If the opening time is too late, the weaving parameters should be adjusted according to the variety.
5. The harness is too high.
6. Uneven tension between skein and warp.
7. The tension of waste warp yarn is unbalanced.
D, several reasons for bad hem:
1. The spring tension clamp of the stranding tower behind the machine is loose.
2. The magnetism of the splayed slider inside the strander is too small.
3. The insertion of the upper and lower selvage needles is not good. The selvage is usually in a flat position. When the upper and lower healds move, there is a selvage yarn on the left and right sides of the selvage needle.
E. Reasons for abnormal sound of heald frame:
1, heald frame gap is not good, heald pitch is bent.
2. The straight heald bar bends and rubs the heald frame, which makes the heald frame partition vulnerable to damage and the screws loose.
3. The heald box heals badly.
F. Reasons for no parking:
1, large brake clearance.
2. There are oil stains on the two friction surfaces.
3. The brake has poor contact with the clutch plate.
G. Reasons for yarn blocking:
1, the cloth board is low.
2. The comprehensive distance is low.
3. The leveling time is late.
4. The expansion force of the right waste edge is not tight, and there are too few waste edges.
5. Picking up the sword too early, sometimes warping can't be leveled when the process needs it.
H, the origin of cloud weaving:
The winding and let-off are not good, and the weft is not clear. In addition, the selection of heald and reed numbers also has a direct impact, and the weaving process is wrong.
Me, double weft
Small weft tension, poor weft supply and damaged weft selection board may all produce double weft.
J, weft shrinkage
Improper weft capacity, too late weft opening and worn weft loosening device may all lead to weft shrinkage.
K, temple defect
There is a ring on the copper thorn ring, so it is not flexible to rotate. The side support cover is not centered with the copper barbed ring, and the needle tip of the side support touches the hook yarn.
L, lack of weft
The pattern paper was typed wrong, and the weft feeder missed the weft.
Fourth, weft insertion
1. It takes 70 minutes for the weft sending sword and the weft receiving sword to feed the first side yarn. ~75? . Generally speaking, the time of weft insertion sword is similar to that of heald. The weft yarn will be broken by warp yarn too early, which will lead to the broken weft at the edge of the cloth and the shrinkage of the weft yarn too late. Some kinds of tail yarns will be caught by warp yarns.
2. Pay attention to a principle, that is, it is late to enter the sword early and early to enter the sword late.
3. The central handover time of the weft sending sword and the weft receiving sword is 180? The distance between the let-off rapier and the first track piece is about110mm ~115mm; Secondly, the distance between the two ends of the sword head is 60mm~70mm, and the gap between various gears is small, so moving too far is easy to damage the sword head.
4. The whole weft insertion process is as follows: the weft is introduced into the center by the weft storage device, tension piece, weft detector, color selector, weft feeder and weft scissors, and then the weft feeder picks up the weft, takes out the selvage and releases the cam, so that the whole weft insertion process is completed.
The main function of weft accumulator is to make the winding tension of weft uniform and send a certain amount of yarn in normal operation.
The main purpose of expansion force is to make weft yarn have a certain expansion force. If the expansion force of weft is too small, the waste yarn tail will grow or even relax until the weft is brought into the weaving shed to form a double weft. If the capacity is too large, the waste edge will not fit the weft, resulting in weft shrinkage and lack of weft at the edge of the cloth.