Jacquard principle of jacquard

The jacquard principle of jacquard, there are two differences in the production of jacquard fabric and small jacquard fabric, one is that jacquard does not need a brown frame, but a more complicated combination of faucet + through wire + mesh plate + brown wire; Jacquard veneer curtains are generally very long. There are N weft yarns in a jacquard return position, and N pieces of veneer must be matched. There must be special brackets for hanging veneer curtains. If the front and back are wrong or the left and right ends are adjusted, the wrong pattern will be woven, and it is also very troublesome to find the wrong pattern board. The bracket of the hanging pattern board curtain is generally arranged above the loom together with the jacquard faucet. A small jacquard plate generally has a maximum of 24 pits, which are used to control the lifting of the brown frame and weft selection. A large jacquard plate has thousands of pits, which correspond to the number of stitches on jacquard fabric manufacturers the faucet of the jacquard machine. The hole position is aligned with a needle, and the browning is controlled by whether the hole position is punched or not. The principle is that the warp yarns with the same movement trajectory can be hung on a dragon hook through their respective wires. If the number of warps exceeds the load-bearing capacity of the dragon hook, you can consider several hooks to share the load. In many cases, one hook The number of threads hung on it is the number of flowers in the whole cloth. Their information transmission process is pattern plate---pattern needle---dragon hook---through wire---heddle wire---warp.
The advanced computer jacquard faucet jacquard machine can save the trouble of making pattern boards and arranging a bunch of pattern boards to run. At the same time, the time from design to start-up is greatly shortened, and it is also 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 general fabrics, can only be made with a limited number of yarn counts and densities, and not all patterns can be lifted. Because it is jacquard, warp yarns have many different weaving structures, and may have different weaving tightness. , so that the warp tension is uneven during the weaving process. If the tension unevenness is slight, it can be produced, and the cloth surface has some uneven phenomenon, or it is easy to have star jumps. If it is serious, it cannot be weaved, or the weaving efficiency is very low, and there are many defects. This requires that the feasibility of production should be fully considered when designing the jacquard process, which mainly depends on the structure of the flower part and the ground part, the size of the block surface of the jacquard part, and whether the flower is evenly distributed on the cloth surface. The technicians of the factory will estimate the production difficulty of a variety based on these factors, which can be used as a reference for the business department when quoting and receiving orders. When encountering varieties that are too difficult to produce, the factory will often give up. The more common jacquard method is to make the front and back weave of the flower and the ground respectively, or similar organizations, such as the Henggong flower in Zhigong, 1/3 flower in 3/1, 2/2 flower in 3/1, and 1 in 2/1. /2 Flowers, or flowers and ground tissues are exchanged. When the weave structure of the flower part and the ground part is different, such as the jacquard cloth of the plain weave, it is best to have a linear pattern, which is evenly distributed on the cloth surface, and try to make the number of interlacing points experienced by each warp yarn to be the same or similar. If this is not possible, consider double beams or triple beams, arrange warp yarns with similar tensions on the same beam beam, and draw warp yarns of different lengths respectively.
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