① Unwinding of white fabric: Unwinding is the first step of the whole process. This process seems simple, but there are certain hidden safety hazards. Pay attention to defects such as weft skew and wire drawing when unwinding.
② Sewing head: When sewing the head, pay attention to the connection of each box of cloth, and use flat stitching. This is mainly because it is flexible and convenient to use, the sewing head is firm, and the amount of thread is small. It is suitable for various types of machines and trolleys. Seams between cars. However, the use of flat-stitched fabric layers can easily cause defects such as crossbars. Therefore, when sewing the head, the cloth head is not too wide, about 10 ~ 15cm.
③ Predetermined type: Predetermined type refers to direct heat setting (temperature of 190 ~ 230 ° C) of the white gray fabric, so that the fabric will be in a relatively stable state when the dyeing and finishing process is started. The arrangement of the setting process has the advantages that the fabric is not easy to stick to hair during the dyeing process, the style is good, and it is not easy to deform and crease during subsequent processing.
After the loose-shrinked fabric is pre-shaped by dry heat, the style of the fabric is affected. It is necessary to eliminate wrinkles and improve the uniformity of molecular structure arrangement. It is necessary to apply tension to the fabric, and the increase in tension will reduce the crepe effect, reduce the activity, and reduce a series of properties such as softness, resilience, fullness, etc. In order to avoid the crepe effect disappearing and affecting the fabric style, the predetermined width is generally 3 ~ 5cm wider than the finished product. The tension of the guide rollers in the front car is all relaxed, plus appropriate overfeeding (usually controlled within ± 40%) to maintain the warp. The buckling improves the style of the fabric. The predetermined temperature is generally controlled at 165 ~ 200 ° C. The setting time is determined according to the fiber heating time, thermal penetration time, fiber macromolecule adjustment time, and fabric cooling time. As long as the setting tension meets the requirements for the flatness of the fabric, the appearance can be guaranteed, so as not to affect the texture of the fabric.
When booking, pay attention to not dripping oil, tearing edges, and measuring the length of the door width. The weight and customer requirements must not exceed ± 10g. Secondly, pay attention to whether there are air duct marks, grids, and colors. , Whether sticky hair and other issues, these issues must be resolved with caution and timely. Always pay attention to whether the equipment is intact, and whether the tension, temperature and cloth speed control are appropriate. And when the wind channel mark is generated, it is necessary to see the small wind level, the general wind level is about 1500 rpm, and one side should pay attention to the towing wind path.
④Hemming: The operation of hemming is similar to that of seams. It uses woolen edging and the width is about 3 ~ 5cm. Workers must strictly ask themselves during the hemming process. Do not increase the hemming width for convenience and speed. The process is mainly for the next process to prevent curling during dyeing.