3D knitting yarn carrier

Abstract

The invention provides a three-dimensional braiding yarn carrier which comprises a support, a yarn storing casing, a yarn storing wheel and a reciprocating rotation device, wherein the support is provided with a yarn guiding hole; the yarn storing casing is an annular casing with an axial gap and is arranged on the support; the yarn storing wheel is arranged inside the annular casing and can freely rotate relative to the annular casing; the reciprocating rotation device is connected with the annular casing by power. By adopting the structure of the three-dimensional braiding yarn carrier, when a coil spring of the yarn carrier works between a tensioning state and a relaxed state, the rotation turns of the annular casing are basically unchanged, drastic fluctuation of yarn tension is avoided, and the braiding quality of three-dimensional braided fabric can be guaranteed.

Description

technical field [0001] The invention relates to a yarn carrier used in three-dimensional weaving. Background technique [0002] Three-dimensional weaving technology is an important way to prepare composite materials, especially advanced fiber-reinforced composite material preforms. application. In three-dimensional knitting equipment, it is inevitable to need a yarn carrier with yarn returning function. [0003] The yarn carrying device of the existing knitting machine has a small amount of yarn return, and is generally only suitable for two-dimensional weaving, while three-dimensional weaving requires a larger amount of returning yarn, and generally such a yarn carrying device will not be used directly. There are also some yarn carriers that are modified from this kind of yarn carrier, but it usually leads to serious yarn wear. [0004] More typical are the following two typical three-dimensional knitting yarn carriers, such as Chinese patent No. CN1320736A and U.S. pate...

AI Technical Summary

Problems solved by technology

[0003] The yarn carrier of the existing knitting machine has a small amount of yarn return, and is generally only suitable for two-dimensional weaving, while three-dimensional weaving requires a larger amount of yarn return, and generally this yarn carrier will not be used directly

There are also some yarn carriers that are modified by using this kind of yarn carrier, but it usually leads to serious yarn wear

[0004] More typical are the following two typical three-dimensional knitting yarn carriers, such as Chinese patent No. CN1320736A and U.S. patent No. US005156079A. The above-mentioned Chinese patent adopts the technology of separating the rotary wheel and the yarn storage drum to achieve large yarn return and large yarn storage. The amount of yarn coming out of the yarn return drum is less worn, but the yarn between the yarn storage drum and the return yarn drum will be twisted as the return yarn drum rotates back and forth, destroying the light of the fiber. Shun, the quality of the fabric is reduced, and fiber damage may also occur

The above-mentioned U.S. patent is relatively simple in structure, but the important problem is that with the consumption of yarn, the yarn on the bobbin will become less and less, so when the elastic coefficient of the coil spring is constant, the bobbin is full of yarn and is about to be used up. The yarn tension will be several times different, and the amount of returned yarn will be reduced a lot

Images