When the shuttle flies in the shuttle, shuttle rolling and flying will occur due to improper positioning of the side supports and heddles, incorrect curvature of the reed, shuttle plate, and poor installation of the shuttle box.
1. Improper installation of the temple support
(1) The temple support is installed too high, and the shuttle is unstable and prone to turning over when held up by the warp yarn.
(2) The bolts of the reed seat feet (K1, K2) are loose, causing the reed seat to sink. The side support box is 9.5mm higher than the shuttle board, resulting in a too large distance between the warp yarn and the shuttle board, which will cause rolling. Shuttle and shuttle.
The correction of the temple position should be done in conjunction with the upper shaft. Check with a spacer. Correct height position of the side supports. For general plain fabrics, when the bending axis is at the front center, the gap between the side supports and the shuttle board should be 8.5mm.
2. Defective hanging heddle
(1) The vortex heddle is high or uneven:
1. The hanging heddle is too high, and the lower warp yarn is far away from the shuttle board, so the shuttle floats and easily turns over; the hanging heddle is too low, and the opening becomes smaller, and the lower warp yarn When replaced with the upper warp yarn, it sags, the opening is unclear, and the shuttle movement is blocked.
2. The hanging heddle is uneven and the heald frame is tilted, causing the warp tension and high and low positions at both ends to be different, which will cause rolling and flying shuttles.
Elimination method:
When using poplin fabric with a single pedal, the gap between the lower warp yarn and the shuttle board is generally o. 2mm, that is, the lower warp yarn just floats on the shuttle board; for poplin fabrics using double pedals, the distance between the lower warp yarn and the shuttle board. The heald frames on the first and second pages are 0.8mm, and the heald frames on the third and fourth pages are 2.4mm.
(2) The installation position of the lifting heddle shaft is incorrect; the lifting heddle shaft passes forward, the heald frame touches the reed cap, and the upper warp yarn is depressed by the clamping wood on the reed cap, causing the heald frame to move unstable and the warp yarns to jump, causing shuttle rolling and flying. shuttle.
Elimination method:
The installation specifications of the poplin fabric heddle shaft are: when using a single treadle, the distance from the heddle shaft to the rear edge of the top beam is 165mm; when using double treadles, the distance from the heddle shaft to the top is The distance between the rear edges of the beam is 80mm.
(3) Defective heald clips, heald frames, and lifting harnesses:
1. The upper heald clip is broken and dropped, and the warp yarns hang down, and the opening is unclear, and the shuttle flight is blocked; the lower heald clip is broken and dropped, and the warp yarns are easy to float. The shuttle motion floats erratically.
2. The heald frame is broken and bent, causing the upper warp yarn to droop and the opening to be unclear.
3. The lifting harness belt is too tight. The warp tension is too high, causing the shed to become smaller. The shuttle cannot pass smoothly. Causes rolling and flying shuttles.
3. The shedding, let-off and coiling parts are loose and worn
(1) The upper and lower lifting heald adjustment bolts (M33, M42) are loose, the upper and lower lifting heald belts (R36, R23) are worn and broken, and the lifting heald plank (Q16) is broken , the tread rod rotor (A5) and tread plate (E3) are disappeared.
(2) The guide foot of the let-off adjusting rod (C15), the let-off movement connecting rod (C33), and the adjusting rod (C34) are worn, loose, and the pins fall off.
(3) The coiling rod (L6) and the coiling and raising fishing rod square iron (L68) are loose, etc.
The above reasons will cause the cloth surface to not be rolled up, the shed height to become smaller, and the shuttle to not pass smoothly.Cross the shuttle. in addition. If the let-off and take-up are not coordinated well, the cloth surface tension will be too high, which will easily cause shuttle rolling and flying shuttle.
Elimination method:
Strengthen the inspection, maintenance and replacement of the above components to ensure that the shed height meets the requirements. To correct the shed height, with the bent axis at the rear center, there should be a 3-5mm gap between the front wall of the shuttle and the upper warp yarn, and a 0.2-1.0mm gap between the lower warp yarn and the shuttle board.
For the shed height of corduroy fabric, when the bent axis is turned to the end position of the shuttle rod, there should be a gap of 1.6-3.2mm (1/16-1/8 inch) between the front wall of the shuttle and the upper warp. . When the semi-bent shaft is in the rear position, the distance between the first and second heald shuttle plates of the lower warp yarn is 0.8mm (1/32 inch), and the distance between the third and fourth healds is 2.4mm (3/32 inch
).
4. The reed’s curvature is incorrect. New reed holders are often deformed due to changes in temperature and humidity or poor wood quality. The reed holder is damaged over time or the quality of the glue is poor, all of which will affect the reed’s curvature. If the arc of the reed is too small, the shuttle will fly unstable; if the arc is too large, the friction between the shuttle and the reed will increase, and both will be prone to wear. Causes rolling shuttle
with flying shuttle.
Elimination method:
The center of the reed should protrude 4mm from the outer edges on both sides of the shuttle box bottom plate. At the same time, the width of the outer end and the inner end of the shuttle box bottom plate are also different. It should be installed on the reed base with the inner end facing toward the outer end. The shuttle plate is 0.8mm posterior than the bottom plate of the school box, so the total curvature of the steel extension is 4mm.
5. The arc of the shuttle board (Q2) is too large, too small or in poor condition
(1) The arc of the shuttle board is too small, making the shuttle motion unstable; the arc is too large, increasing the friction between the shuttle and the warp.
(2) The shuttle lever is loose and worn, and the contact point with the shuttle box bottom plate (K14, K15) is not smooth. The shuttle flies erratically.
Elimination method:
The center of the shuttle board is 4mm lower than the outer edges of both sides of the shuttle box bottom plate. At the same time, the thickness of the outer end and the inner end of the shuttle box bottom plate are also different. The inner end mounted on the reed base is 2.4mm lower than the outer end, and the total arc of the shuttle board is 4mm. If the shuttle board is worn out, it should be replaned or corrected by inserting cardboard between the reed base and the shuttle board.
6. Shuttle box back plate (Q3) is poorly installed
(1) The shuttle box back plate is installed in an incorrect position, the joint between the shuttle box back plate and the movable back plate is not flexible, and the spring of the movable back plate is too tight or too loose. It is not close to the bottom plate of the shuttle box, and there is cotton dust embedded between the back plate of the shuttle box and the bottom plate of the shuttle box, which widens the inner distance between the shuttle and the front plate of the shuttle box, causing the shuttle to roll and fly.
(2) Shuttle The angle between the box back plate and the movable back plate (Q4) is greater than the angle of the shuttle, and the upper edge of the gap is empty. The shuttle flight is unstable; if the angle is smaller than the shuttle angle, wavy wear will easily occur on the back of the shuttle, resulting in rolling and flying shuttles.
(3) The head iron or gantry stop of the movable back plate and the movable back plate are flush with each other. When the shuttle enters the shuttle box mouth, the shuttle head end collides with the head iron or gantry stop, and the head end of the movable back plate is obliterated and lowered. Traps, etc. make the shuttle flight unstable, resulting in shuttle rolling and flying.
Elimination method:
(1) Make the inner side of the shuttle box back plate and the shuttle box bottom plate closely connected and in a straight line. The shuttle box back plate and the movable back plate are flexible at the junction of the hinge spring. The spring elasticity of the movable back plate should be moderate.
(2) The angle of the shuttle box back plate and the movable back plate should be consistent with the angle of the shuttle back plate, and should be corrected with a spacer block. There should be no gap.
(3) The header iron or gantry gear should be larger than the movable The back panel is low D． 4mm, cannot be flush with each other. The head end of the worn and sunken movable backboard should be removed and planed, or an iron plate should be installed, and small pieces of nitrile should be inlaid, or the head iron should not be made of iron at all. The gantry stop is made of nylon to reduce shuttle wear and ensure shuttle flight stability.
7． The gantry gear (J31) is bent or has an incorrect angle, protruding from the reed surface. When the shuttle hits the protruding point of the gantry gear, it changes its flight direction, causing fluffing and obliteration on the back of the shuttle, as well as rolling and flying of the shuttle.
Elimination method:
If the gantry gear is bent or at an incorrect angle, it should be corrected. If it is damaged, it should be replaced and cannot be used anymore.
8. Poor installation and condition of the reed
(1) The height position of the reed installation is not correct, the reed is not fully embedded in the reed clamping wood, and the reed jumps when the shuttle flies. Causes the shuttle to turn over, roll over the shuttle, and fly.
(2) The angle of the shuttle reed does not match the angle of the shuttle back plate, causing the shuttle to fly unstable, causing the shuttle to roll and fly.
(3) The steel reed teeth and steel reed edge iron bars are damaged or protruded, affecting the normal flight of the shuttle, causing the shuttle to roll and fly.
Elimination method;
(1) The lower reed bar of the steel reed should be completely embedded under the shuttle board, and the reed clamping wood should press the center of the lower reed bar.
(2) Use the reed angle rule to check and correct, and there should be no gaps above and below. Use a flexible steel reed adjustment device to adjust the angle, or increase or decrease the positive angle of the paper pad between the reed cap and the reed base foot.
9. The warp yarns are broken, twisted, disconnected, twisted or flying, and the yarn residue falls in, which makes the upper and lower warp yarns tangled, the shed is unclear, and the shuttle movement is blocked, resulting in rolling and flying shuttles.
10. The bobbin is skewed, the bobbin is hairy or the weft yarn has a big knot, which makes the weft yarn unsmooth. When the shuttle is thrown from the switch side. The shuttle deviates from the reed due to the influence of the weft yarn tension, causing rolling and flying shuttles.
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