Textile Composites Are Widely Used In China.

< p > with the wide application of < a href= "http://www.91se91.com/news/index_c.asp > > textile composites > /a >, the requirements for the structural modeling of knitted fabrics are becoming more and more diverse. At present, three dimensional tube shaped fabric, three dimensional round shell fabric, three dimensional hollow fabric and three-dimensional solid fabric have been developed in the world.

Through observation, many parts of machine equipment are box shaped, such as Ma Dazhao, the shell of machine equipment, and so on. The shape of the box is varied: square, rectangle, multi box structure, trapezoid shape and so on.

The design and production of box shaped fabric, as a reinforcing material for textile composites, has wide application prospects.

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< p > at present, the methods of producing three-dimensional fabrics are mainly woven, knitted and braided. Different methods of forming fabrics have different principles and different mechanical properties. Woven three-dimensional fabric has high production efficiency and stable structure, which is conducive to the strength of yarn itself.

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< p > three dimensional tube fabric and three dimensional hollow fabric are woven fabrics. The principle of production is the combination of different layers of fabric. With reference to the production method of three-dimensional tube and three-dimensional hollow fabric, can we use different layers of fabric combination to design and produce box shaped fabrics? Inspired by this idea, after repeated thinking and trying, the box shaped fabric is folded, using the weaving principle of multi-layer fabric, and the method of combining different layers of fabrics can be used to design and produce box shaped fabrics.

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< p > from the results of folding simulation test, it can be concluded that the box shape < a href= "http://www.91se91.com/news/index_f.asp" > fabric > /a > that meets the requirements of this size, in addition to reasonably designing the upper machine drawing of fabric, the key is to control the warp and latitude of the fabric and ensure the 45 degree angle to ensure the fabric as the box shape.

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< p > if the ratio of warp to weft density is 1: 1, to make the triangular fabric 45 degrees, we need to control the warp and weft yarn in the triangle area at the ratio of 1 to 1.

If the warp and weft density is not 1:1, the number of weft knitted yarns can be controlled according to the ratio of warp / weft yarn density, and the angle formed by the triangular area is 45 degrees.

After folding, there are 45 or 4 layers of double weave area along the warp and weft direction. Even though the size of the box is very small, the general cam opener and dobby loom can no longer meet the production requirements, so it needs to be produced on jacquard looms.

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< p > research has found that the design of square box fabric can be divided into two main parts: one is "a href=" http://cailiao.sjfzxm.com/ "> the square box fabric < /a > the long side of the bottom is larger than or equal to 2 times the high time, and the box fabric is designed by the double weave weaving method. In the other case, when the square box fabric is 2 times larger than the long side of the square box fabric, it can use the 4 fold method to design and produce the box shaped fabric.

At the same time, the problems needing attention in the production of box shaped fabrics are expounded, which brings convenience to the design and production.

For other shapes of boxes, the folding method can also be used to design some boxes based on square boxes.

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