Rifle-shaped felting needle

Abstract

The invention relates to a rifle-shaped felting needle. The felting needle consists of a needle rod, a middle section and a working section which are integrated; the ridge of the working section is rifle-shaped; and fiber storage grooves are formed between the adjacent ridges. The designed needle form is particularly suitable for weaving of thick and compact fibers, and weaving of nonwoven fabric which has high fragility (such as ceramic fiber, glass fiber and the like) or nonwoven fabric which has high friction force (such as carbon fiber, stainless steel fiber, aramid fiber, high-strength polyethylene fiber and the like). The felting needle can be used for weaving carbon fiber members used for aerospace.

Description

technical field [0001] The invention relates to a device for producing nonwovens, in particular to a needling machine part. Background technique [0002] The needle is an important device for the production of non-woven fabrics. It punctures the fiber web layer up and down at high speed, so that the fibers are entangled with each other to form various non-woven fabrics. The traditional non-woven needle is composed of a needle bar, a middle needle bar and a hook body made of one piece. The hook body is a triangular body, each edge is peak-shaped, and a plurality of hook teeth are arranged in sequence on it. Since multiple hook teeth are arranged in a straight line, during the puncture process, when the first hook teeth randomly hook fibers, the probability of subsequent hook teeth hooking fibers will be significantly reduced, resulting in low work efficiency. [0003] The patent number is: 200620101167.8, and the utility model patent titled "Spiral Non-woven Pricking Needle"...

AI Technical Summary

Problems solved by technology

Such as: ceramic fiber, carbon fiber, glass fiber, stainless steel fiber, aramid fiber and other non-lubricating fibers. Due to the high brittleness of the fiber itself, the friction between the fiber and the fiber is large, and the friction coefficient is large. Therefore, the existing needle The strain on the fiber itself is severe, and the fiber itself is damaged, resulting in defects such as delamination of the fiber web layer, which directly destroys the performance of the nonwoven.

[0005] The performance indicators of carbon fiber components used in aerospace are extremely strict, especially requiring high entanglement and cohesion between fibers. However, the use of existing needle-woven nonwovens cannot meet the relevant requirements. Require

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