General production technology of jacquard fabric

According to the customer's samples or color samples+fabric specifications, the factory allows the professional diamond plate and computer technology processing factory to design the process and make the model. Then according to the process, yarn feeding, dyeing (color weaving), making warp beams (maybe two or three), hook adjustment, thread hanging, threading (threading on the loom), pattern fitting, weft density adjustment of the loom, pattern matching, opening, grey cloth trimming, sorting, sorting and packaging.

Jacquard principle of jacquard, there are two differences between jacquard fabric and small jacquard fabric in production. One is that the jacquard machine does not use brown frame, but uses a complex combination of faucet+heald+mesh+brown silk; Second, jacquard pattern curtains are generally very long. If there are n weft yarns in a jacquard loop, there must be n pattern plates, and there must be a special bracket wall chart table curtain. It is important to wear a model. If the front and back of the pattern are wrong or the left and right ends are adjusted, the wrong pattern will be woven, and it is very troublesome to find the wrong pattern. The bracket of the hanging curtain is generally arranged above the loom together with the jacquard faucet. Generally, there are at most 24 holes on the small jacquard board, which are used to control the jacquard and weft selection of the brown frame respectively. A large lifting diamond plate has thousands of holes, corresponding to the number of needles on the jacquard faucet. Each hole position is aligned with a needle to control whether to raise brown, and one hole position controls the movement of several warp yarns, which are one or several of each flower in the whole fabric. The principle is that warp yarns with the same trajectory can be hung on a hook through their own healds. If the quantity is too much, which exceeds the load-bearing capacity of the hooks, you can consider sharing it with more hooks. In many cases, the comprehensive number hanging on the hook is the number of flowers in the whole cloth. Their information transmission process is pattern plate-pattern needle-hook-heald-heald-warp.

The advanced computerized jacquard faucet jacquard machine saves the trouble of making flower boards and arranging a pile of flower boards to run. At the same time, the time from design to start-up is greatly shortened, it is easy to modify and the efficiency is greatly improved, but the equipment investment is much higher, often ten times or more than that of ordinary machines.

Jacquard fabrics, like ordinary fabrics, can only make limited yarn count and density, and not all patterns can be raised. Because it is jacquard, the warp yarns have many different knitting structures, and may have different knitting compactness, so that the tension of the warp yarns will be uneven during the knitting process. If the tension is slight, it can be produced, and the surface of the fabric is uneven or prone to star jumping. If it is serious, it is impossible to weave, or the weaving efficiency is very low, which is accompanied by many defects. This requires that the production feasibility should be fully considered when designing jacquard technology, mainly depending on the structure of flowers and ground parts, the size of some jacquard blocks and whether the flowers are evenly distributed on the cloth surface. According to these factors, the technicians of the factory will estimate the production difficulty of a variety for the reference of the business department when quoting and taking orders. The factory will give up when it comes to varieties that are too difficult to produce. The common jacquard method is to weave the positive and negative weaves of flowers and the ground respectively, or similar weaves, such as straight cross, 3/ 1 to 1/3 flowers, 3/ 1 to 2/2 flowers, 2/ 1 to/0/2 flowers, or flowers. When the weave structure between the flowers and the ground is not tight, such as plain jacquard fabric, it is best to have linear patterns and distribute them evenly on the cloth surface, so that each warp yarn experiences the same or similar interweaving points. If this is not possible, we can consider double warp beams or triple warp beams, arrange the warp yarns with similar tension on the same warp beam and pull the warp yarns with different lengths respectively. Large jacquard machines are generally divided into 1400 stitches, 1800 stitches, 2240 stitches, 2400 stitches, 2800 stitches and 3700 stitches. 2400 stitches and 1400 stitches are the most common, and it is easier to make big patterns with more stitches. The 2400-needle machine is basically. Weft loops are related to the warp density and the number of needles in the fabric. If all warp weaves do not repeat in a cycle, the maximum number of warp yarns in this flower is the number of needles. Combining the warp and weft density of the fabric, we can know how wide the flower shape can be, so the factory is more concerned about weft returning. If there is a jacquard fabric with specifications of 50x50, 144x80, the flower shape is a vertical ellipse, and the warp and weft loops are the length and diameter of the ellipse respectively. If it is made of a 2400-needle jacquard, the maximum weft return size can be calculated as: 2400X2/ 144=33 inches, which means that the widest flower-shaped ellipse is 33 inches. If the flower is not oval in shape,