Yarn carrying guide piece, yarn laying device for three-dimensional fabric and yarn laying mode

Abstract

The invention discloses a yarn carrying guide piece. The yarn carrying guide piece comprises a long-strip-shaped guide plate, wherein a plate body is formed in the middle of the guide plate; a yarn carrying end and a fixed end are formed at the two ends of the guide plate in the length direction respectively; a yarn guide hole is formed in the yarn carrying end; and the yarn guide hole extends along the width direction of the guide plate and penetrates through the two sides of the yarn carrying end in the width direction. The invention also discloses a yarn laying device for a three-dimensional fabric. The yarn laying device utilizes the yarn carrying guide piece as a yarn carrying component. The invention also discloses a yarn laying mode of the three-dimensional fabric, and the yarn laying mode is carried out by adopting the yarn laying device. By means of the yarn carrying guide piece, extrusion of steel needles to fibers when the fibers are laid can be effectively avoided, and breakage and abrasion of the fibers due to extrusion are avoided.

Description

technical field [0001] The invention belongs to the field of integral yarn-laying fabrics in three-dimensional fabric weaving, and in particular relates to a yarn-carrying guide piece, a yarn-laying device and a yarn-laying method of a three-dimensional fabric. Background technique [0002] Yarn-laid three-dimensional fabric is an emerging high-tech new material with good mechanical and ablation properties, and is widely used in the aerospace field. [0003] The three-dimensional fabric formed by the laying process refers to laying fibers between the X-direction (row) and Y-direction (column) gaps of the pre-laid Z-direction steel needle matrix, and replacing the Z-direction steel needles with fibers after meeting the design requirements. The formed three-dimensional fabric. Yarn laying process can not only lay fibers between single row or column gaps, but also lay fibers between entire rows or entire column gaps. The latter is called overall laying, which improves producti...

AI Technical Summary

Problems solved by technology

Due to the narrow net distance between adjacent steel needles, when the threading steel sheet carries fibers between the steel needles, the sum of the thickness of the steel sheet and the diameter of the yarn on both sides has exceeded the distance between adjacent steel needles. Therefore, during the weaving process, the yarn will produce a small-radius bend of approximately 90° under the extrusion of the steel needle. Because the fibers used in the three-dimensional fabric often use inorganic fibers such as carbon fiber, basalt fiber and glass fiber. Although these fibers have undergone surface treatment to improve their flexibility and can withstand a certain degree of bending, but in the process of weaving three-dimensional fabrics, the bending radius produced by the yarn is extremely small, which often causes the fibers to break or cause wear and tear, affecting Fiber quality, which affects the quality of the entire three-dimensional fabric

In addition, when the fiber is broken, it is necessary to stop the machine to process the broken end of the fiber and to re-join, which also affects the weaving speed and efficiency

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