How To Avoid Problems in The Production Of Sofa Elastic Bands
Sep 11, 2021
During the production process of sofa elastic bands, some conditions will occur, which will lead to deviations in the quality of the products. If there is a problem in any part of the production, the product will be scrapped. Do you know how to avoid the following problems in the production process of elastic bands, so as to improve the production qualification rate?
1. Curved belt
Reasons: uneven threading of steel buckles; uneven yarn drawing on pan head; wrong position of steel buckles; wrong yarn splicing method.
Preventive measures: The steel buckle must be worn according to the regular method, one or two sets of wear; pull off the larger and looser side until it is as flat as the other side or 1-5 turns less; steel The distance between the buckle and the knitting needle is usually a gap between the steel buckle; according to the needs of the elastic band, it can be divided into upper and lower layers, or divided, left and right, usually divided into upper and lower, if there are more than two methods or The lines must be connected separately.
2. Waves
Reasons: uneven threading of steel buckle, too much yarn on both sides and too little in the middle; too large steel buckle, too tight weft tension; uneven tension of the pan-end yarn, tension on both sides, and excessive tension in the middle Loose; the yarn splicing method is wrong, and the balance drop is not good.
Preventive measures: use standard steel buckles and wear them according to 1 or 2 groups; according to the width of the elastic band, choose steel buckles to wear; change the middle and both sides of the yarn to a few, or pull the middle looser. Come down; according to the elastic band method, you need to connect it, and the balance fall is averaged according to the number of strips.
3. Poor needle edge
Reasons: the thickness of the weft yarn is uneven; the knitting needle is wrong, too long or too short; the pan head goes abnormally, sometimes tight or loose; the weft wheel is not round enough and deformed; the needle holder is worn out.
Preventive measures: change another weft yarn; the length of the knitting needle is shorter according to the thickness of the elastic band. Generally speaking, the length of the knitting needle is just enough to retract the weft yarn; fix the two sides of the pan head firmly, and do not let the pan head lean against the iron on both sides Frame; replaced with a new weft wheel; replaced the fixed rod, or processed.
Four, fluffing
Reasons: needle edge fluffing; cloth edge fluffing; elastic band surface fluffing.
Preventive measures: The needle plate has been used for a long time and is damaged. Changed the new needle board; the knitting needle is damaged, and the new knitting needle has been replaced; the pressure plate is too tight, loosen the pressure plate; the weft yarn is not finished, adjust the distance between the weft needle and the knitting needle, so that the weft yarn can finish hanging ；Hang the steel buckle for the weft yarn and put the weft yarn into the weft yarn rod; if the steel buckle is damaged, replace another steel buckle; the raw material itself has hairs, if it is partly fluffed, replace the fluffed ones, if there is too much fluffing, finish the goods Do a full inspection tape in the future; if the weft needle is damaged, change one, or hit it with gauze; if the steel buckle is damaged, hit it with gauze, or replace it with another steel buckle; if the brown silk piece is damaged or the stop piece is damaged, it’s changed. new.
Five, size
Reasons: The uneven thickness of the raw materials makes the elastic band large or small; the steel buckle is too large or too small to make the elastic band size; the weft wheel is loose during the operation; the weft yarn passes through the rod spring, and there is yarn wool inside.
Preventive measures: measure the width of the elastic band frequently, and adjust it immediately when it is found to be unqualified; do not wear the steel buckle too large or too small, and re-wear the elastic band if it is unqualified. Do not reluctantly produce; adjust and fix the weft wheel; Loosen the outer spring often so that the yarn and wool can come out.
Six, the color of yin and yang
Reasons: the raw material has a color difference; the pan head is unevenly pressed; the steel buckle is worn unevenly.
Preventive measures: change the fluffing or change the pan head and do not use it; press the pan head heavy; set the position of the weft needle in the middle of the opening.
Seven, skip stitches
Reason: The needle bar is not properly blocked; the position of the weft needle and the knitting needle is not right.
Preventive measures: The position of the needle bar is dependent on the knitting needles; the weft needles and knitting needles are in a good position so that the weft can be hung up completely.
Eight, easy to dirty belt processing
Reasons: the brown silk flakes are too dirty; all the spools are too dirty; all the places where the yarn passes are not clean enough.
Preventive measures: In the accessory room, bring tissues and chalk to wipe clean the brown silk; wipe all the belt shafts; wipe all the places where the yarn passes and where it can be touched.
Nine, waves on both sides
Reason: The steel buckle is not evenly worn, the yarn on both sides is small, and the yarn in the middle is too much; the steel buckle is worn too small.
Preventive measures: choose the right steel buckle and wear the elastic band according to the regular wearing method; the steel buckle should be worn a little bit, and don't wear too much or too little.
10. Lines
Reason: the bottom yarn is thicker than the veil; the steel buckle is not worn properly, and the bottom yarn is not covered; the steel buckle is too thin, and the yarn is threaded too much every time.
Preventive measures: change the thicker bottom yarn to the side, or replace it and add another one; choose a suitable steel buckle, one or two sets of wear; in general, try to use one or two sets of wear Do not use 3 or more sets of wearing methods.
