The warp and weft yarns of the fabric located at the edge support are rolled and broken by 1 to 2 pieces, forming a yarn body that is easily broken, and is called a side support defect, as shown i...
The warp and weft yarns of the fabric located at the edge support are rolled and broken by 1 to 2 pieces, forming a yarn body that is easily broken, and is called a side support defect, as shown in 2-2.
[I) Causes of formation
There are many factors that cause side support defects. There are mainly the following aspects:
(1) The position of the side support box is too high or too low, and the full weaving opening of the fabric is not on the same horizontal line, forming the fabric sides protruding outward and the cloth body is concave inward. When weaving, the cloth body is affected by the weaving force and produces a cow’s jump. The fabric in the edge support box cannot move due to the extension of the jaw roller, which generates relative torque, which can easily cause a large number of edge support defects.
(2) The tension on the cloth surface is too high, and the warp yarn is close to the edge support roller, which causes the edge support defects caused by cutting the warp and weft yarns to be cut, mostly regular defects.
(3) The wider the width or the larger the weft shrinkage, the more likely it is to cause side-support defects. When the fabric surfaces on both sides of the fabric leave the side-supporting roller, the support web of the side-supporting defect roller is lost, and the liner of the side-supporting roller shrinks to the center of the fabric body. The tip of the side-supporting roller has a transverse tension against the fabric structure, resulting in a cut Warp yarn opportunity.
(4) Improper use of the edge brace roller, or the newly purchased edge brace roller is not processed in time, the tip part of the tip is dull, or the tip is sharp but has a curved fishing shape, and the warp or weft yarn hooks Pull off.
(5) The jaw rolls in the side support basin have blockages such as short wires, slurry, and objects, which affect the flexibility of the jaw rolls, causing the velocity of the jaw rolls to be inconsistent with the cloth surface, causing the weft yarn to be cut off, resulting in the jaw tips, resulting in the weft yarn Side support defects.
(6) The fitting size or skew of the side support casing cover (L47, L50) and the side support casing seat (L46, L49).
① If the stitch is too small (less than the specified (0.8mm), the surrounding angle of the fabric to the snail roller increases, and the inclination position of the snail roller retreats also increases, which increases the depth of the snail, making it difficult to remove the snail, and easily produces On the contrary, if the joint seam is too large (greater than the specified 0.8mm), it is also easy to cause the warp and weft yarn to be cut and form edges or edges. The joint seam is not flush, the gap is sized, and the end of the joint seam is large will be untie. Early, the small end is removed from the thorn late, forming a difference in the speed of the fabric in the thorn, resulting in cutting.
⑦ The internal assembly of the side support box is not up to standard, and the middle ribs and front and back of the side support box cover (L47, L50) are the middle ribs and front and back Be careful not to be parallel to the jaw rollers, which affects the size of the two rows of jaw rollers and the cloth enclosure angles in the side support box, resulting in a difference in speed between the two rows of jaw rollers. It is prone to have side support defects or edge breaks.
(7) The bracelet thorn roller (L00-1) is too sharp, fast or piercing holes are dull, and side-support defects will also occur.
(8) Improper temperature and humidity adjustment in the weaving workshop will easily produce large-area side-supports. Incorrect, especially when making viscose fabrics, it is more sensitive and has a greater impact.
(9) The hand feeding device is poor, the tension fan rod (C3) has too large up and down movement, and the hand feeding serrated gear support ( B23, B24, B25) The tension of the warp yarn is tight and loose, which is easy to produce regular side-support defects.
(10) The tension of the fabric is too tightIf the slight roll (L55-L58) is slightly rolled, side support defects will also occur.
(22) When rolling the cloth, due to the large diameter of the wooden roller, it is easy to rub against the thorn iron sheet on the rolling cloth, resulting in similar side defects and bad fabrics.
(12) The screw thread on the side support box cover is clamped in front of the box cap (Q22) or the iron rod of the anti-fly shuttle device. .
(13) After the flat car or the cloth is removed, the operation of pulling the cloth into the side support box with your hands is improper.
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