1. Needle path:
During the production process of knitted fabrics, due to various reasons, there are straight stripes on the fabric surface, the fabric surface is transparent in a straight line and the straight fabric pattern falls straight down, and if the bottom light is turned on, it is transparent, and there is a convex and concave line segment on the fabric surface by hand. “Needle Road”.
Equipment
(1) Syringe
During the long-term operation of the needle cylinder, due to the continuous friction with the sinker and knitting needles, the needle and sinker grooves are worn out, which will eventually affect the inconsistency of the working surface of the knitting needles or sinkers, resulting in the different sizes of the knitted loops and forming needle paths. At present, we The needle cylinder management is divided into the following 4 levels. During use, the appropriate needle cylinder should be selected according to the quality requirements of the fabric to prevent the occurrence of needle paths.
New needle cylinder: The new needle cylinder is used for a short period of time, and the needle and sinker groove are free from wear and impact. It mainly produces high-demand fabrics such as brushes, brushed cloth, and mercerized cloth.
Class A needle cylinder: The surface of the needle cylinder is slightly worn, mainly producing mercerized cloth and flat plain cloth.
Type B needle cylinder: the needle and sinker grooves have wear or impact marks, which are downgraded due to the failure of the needle path and other reasons in the production of high-demand fabrics such as sanding.
Type C needle cylinders: worn or repaired during production or machine adjustment, mainly producing piqué fabrics, frame fabrics, needle-drawing fabrics and jacquard fabrics.
(2) Knitting needles and sinkers
After the knitting needles and sinkers have been produced for a period of time, due to the external force on the hooks, the sizes of the needle hooks are inconsistent, and the butts and sinker butts are damaged due to long-term running friction, resulting in different sizes of knitted loops and forming needles. In terms of knitting needle management, it is mainly divided into 4 grades, which are the same as the use of needle cylinders. During use, appropriate knitting needles should be selected according to the quality requirements of the fabric to minimize the probability of needle paths.
New needles: The new needles are used for the first time on the machine and are not worn out. They mainly produce high-demand fabrics such as brushes, brushed cloths, and mercerized fabrics.
Type A needles: Type A needles are short on the machine, slightly worn on the needle heels, and have the same hook size, and are mainly used for plain weave and other high-demand fabrics.
Type B needle: Type B needle is used for a period of time, the needle heel wears inconsistently, the needle hook and the needle latch are worn, and it is mainly produced in piqué or interstripe.
Type C needles: Type C needles have serious needle butt wear, and are mainly used to produce needle-drawing cloths and jacquards that are not sensitive to the needle path of the cloth surface.
(3) Oil and gas supply
Normal oil supply and air supply are the prerequisites to ensure the normal operation of the machine. When the machine runs under the condition of insufficient oil supply and air supply, the wear of the knitting needles and sinkers will increase, which will eventually lead to the occurrence of needle paths. During the process, it is necessary to ensure the normal supply of oil and gas.
(4) Anti-flying aspects
During the production process of knitted fabrics, when the cotton yarn is unwound, a lot of short fibers fall off and accumulate, and may eventually be brought to the knitting area, causing the needle hook to be stretched and causing the needle path, so the anti-flying measures of the machine must be in place.
(5) Automatic stop device for cloth removal and striker
During the operation of the machine, when the cloth comes off or the needle strikes, the automatic stop device of the cloth stripping and the striking needle should immediately stop, otherwise the knitting needle will be pulled and damaged.
(6) The knitting needle types are mixed, and different types of knitting needles must be replaced.
(7) The alignment between the knitting needle and the sinker is incorrect, and the sinker ring should be repaired.
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Post time: Apr-25-2023
