Looping mechanism of warp knitting machine

Abstract

The looping mechanism of the warp knitting machine comprises a guide bar, a yarn guide needle, a sinker and a needle hook, the guide bar is connected with the yarn guide needle, the yarn guide needle comprises a rod portion and an annular yarn guide portion arranged at the bottom of the rod portion, a tree-shaped fractal air channel is arranged in the annular yarn guide portion and connected with a miniature air pump, and the miniature air pump is connected with the sinker. Exhaust ports of the tree-shaped fractal air passages are uniformly distributed in the inner wall of the annular yarn guide part, the sinkers are arranged below the yarn guide needles, and the needle hooks are used for being matched with the yarn guide needles to loop yarns; compressed air is jetted through the tree-shaped fractal air channel in the yarn guide needle, a micron-sized air film is formed between the contact faces of yarn and the yarn guide needle, direct contact friction is isolated through the air dynamic pressure effect, friction force generated by the yarn to the yarn guide needle is greatly reduced, the service life of the yarn guide needle is prolonged, and meanwhile the yield of fabric is increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to the loop forming equipment field of warp knitting machine, especially a loop forming mechanism of warp knitting machine. BACKGROUND

[0002] The guide needle needs to repeatedly guide the yarn movement in the knitting process, and the yarn continuously rubs against the surface of the guide needle (especially the needle hole, needle groove and other areas), which causes the surface material to gradually wear out. The speed of the modern warp knitting machine can reach more than 3000 rpm, and the yarn running speed exceeds 10 m / s, so the friction frequency is extremely high. The increase of the surface roughness of the guide needle will cause the yarn to be fuzzy and broken, and the fabric will have defects (such as hooking and holes), therefore, it is urgent to provide a loop forming mechanism of warp knitting machine with low friction. SUMMARY

[0003] (I) Technical problem to be solved

[0004] In order to solve the above problems of the prior art, the utility model provides a loop forming mechanism of warp knitting machine.

[0005] (II) Technical scheme

[0006] In order to achieve the above purpose, the utility model adopts the main technical scheme including:

[0007] A loop forming mechanism of warp knitting machine, comprising a guide bar, a guide needle, a sinker and a needle hook;

[0008] The guide bar is connected with the guide needle;

[0009] The guide needle comprises a rod part and an annular guide part arranged at the bottom of the rod part;

[0010] The annular guide part is internally provided with a tree-shaped fractal air duct, the tree-shaped fractal air duct is connected with a micro air pump, and the exhaust ports of the tree-shaped fractal air duct are uniformly distributed on the inner wall of the annular guide part;

[0011] The sinker is arranged below the guide needle;

[0012] The needle hook is used for cooperating with the guide needle to form a loop for the yarn.

[0013] Preferably, the tree-shaped fractal air duct comprises a main air duct, a branch air duct and a terminal micropore;

[0014] The main air duct enters the annular guide part from the rod part;

[0015] The branch air channels are arranged in a plurality of numbers, the branch air channels are all communicated with the main air channel, and the branch air channels are arranged in a circumferential array in the annular yarn guide part, and at least two end micropores are communicated with each end of the branch air channel away from the main air channel, and the end micropores are arranged inside the annular yarn guide part.

[0016] Preferably, a Venturi tube is arranged in the main air channel.

[0017] Preferably, the micro air pump adopts a piezoelectric ceramic pump.

[0018] Preferably, an air filter is arranged on the air inlet of the micro air pump.

[0019] (Three) beneficial effects

[0020] The beneficial effects of the utility model lie in: adopting the above technical scheme, the tree-shaped fractal air channel inside the yarn guide needle sprays compressed air (or inert gas), a micron-level air film (thickness about 5-20 um) is formed between the yarn and the contact surface of the yarn guide needle, direct contact friction is isolated by using the gas dynamic pressure effect, the friction force generated by the yarn on the yarn guide needle is greatly reduced, the service life of the yarn guide needle is improved, and the yield of the fabric is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 It is a structure schematic view of a loop forming mechanism of a warp knitting machine;

[0022] Fig. 2 It is a structure schematic view of a yarn guide needle;

[0023] Fig. 3 It is a structure schematic view of a Venturi tube in a main air channel.

[0024] EXPLANATION OF REFERENCE NUMERALS

[0025] 1, a guide bar;

[0026] 2, a yarn guide needle;

[0027] 21, a rod part; 22, an annular yarn guide part; 23, a main air channel; 24, a branch air channel; 25, an end micropore;

[0028] 3, a needle hook;

[0029] 4, a sinker. DETAILED DESCRIPTION

[0030] In order to better explain the utility model, so as to facilitate understanding, the utility model is described in detail in combination with the specific embodiments and the accompanying drawings.

[0031] Please refer to Figs. 1 to 3The utility model provides a loop forming mechanism of warp knitting machine, including the guide bar 1, guide needle 2, sinker 4 and needle hook 3,

[0032] The guide bar 1 is connected with the guide needle 2.

[0033] The guide needle 2 includes a rod portion 21 and an annular guide portion 22 arranged at the bottom of the rod portion 21.

[0034] The annular guide portion 22 is internally provided with a tree-shaped fractal air channel, which is connected with a micro air pump, and the exhaust ports of the tree-shaped fractal air channel are uniformly distributed on the inner wall of the annular guide portion 22.

[0035] The sinker 4 is arranged below the guide needle 2.

[0036] The needle hook 3 is used for cooperating with the guide needle 2 to form loops for yarn.

[0037] The tree-shaped fractal air channel includes a main air channel 23, branch air channels 24 and terminal micro-holes 25.

[0038] The main air channel 23 enters the annular guide portion 22 from the rod portion 21.

[0039] The branch air channels 24 are arranged in a circular array in the annular guide portion 22, and each branch air channel 24 is connected with at least two terminal micro-holes 25 away from the main air channel 23.

[0040] During use, compressed air (or inert gas) is sprayed through the tree-shaped fractal air channel in the guide needle 2 to form a micron-level air film (about 5-20 μm in thickness) between the contact surface of the yarn and the guide needle 2, so as to isolate direct contact friction by using the gas dynamic pressure effect, greatly reduce the friction force generated by the yarn on the guide needle 2, improve the service life of the guide needle 2, and improve the yield of the fabric.

[0041] In the embodiment, a Venturi tube is arranged in the main air channel 23, and the Venturi effect can recover exhaust energy to reduce the energy consumption of the micro air pump.

[0042] In the embodiment, the micro air pump is a piezoelectric ceramic pump, and an air filter is arranged at the air inlet of the micro air pump to ensure that the tree-shaped fractal air channel in the guide needle 2 sprays clean gas.

[0043] The working principle of the utility model is as follows:

[0044] The yarn is contacted with the guide needle 2 by spraying compressed air (or inert gas) through the tree fractal air channel inside the guide needle 2 to form a micron-level air film (thickness about 5-20 mu m) between the yarn and the contact surface of the guide needle 2, the direct contact friction is isolated by using the gas dynamic pressure effect, the friction force generated by the yarn to the guide needle 2 is greatly reduced, the service life of the guide needle 2 is improved, and the good product rate of the fabric is improved.

[0045] The circuit and electronic components and modules are all prior art, and those skilled in the art can realize them without further description, and the content protected by the utility model does not involve the improvement of software and methods.

[0046] The above is only an embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent transformation or direct or indirect application in related technical fields by using the content of the utility model specification and drawings is also included in the patent protection range of the utility model.

[0047] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. A loop-forming mechanism of a warp knitting machine, characterized by comprising: The device comprises a guide bar, a guide needle, a sinker and a needle hook; The guide bar is connected with the guide needle; The guide needle comprises a rod and a ring-shaped guide part arranged at the bottom of the rod; A tree-shaped fractal air channel is arranged inside the ring-shaped guide part, the tree-shaped fractal air channel is connected with a micro air pump, and exhaust ports of the tree-shaped fractal air channel are uniformly distributed on the inner wall of the ring-shaped guide part; The sinker is arranged below the guide needle; The needle hook is used for cooperating with the guide needle to form a loop for the yarn.

2. A loop-forming mechanism of a warp knitting machine according to claim 1, wherein The tree-shaped fractal air channel comprises a main air channel, branch air channels and end micro-holes; The main air channel enters the ring-shaped guide part from the rod; A plurality of branch air channels are arranged, the branch air channels are all communicated with the main air channel, are arranged in a circumferential array in the ring-shaped guide part, and at least two end micro-holes are communicated with each end of the branch air channels away from the main air channel, and the end micro-holes are arranged inside the ring-shaped guide part.

3. A loop-forming mechanism of a warp knitting machine according to claim 2, wherein A Venturi tube is arranged in the main air channel.

4. A loop-forming mechanism of a warp knitting machine according to claim 1, wherein The micro air pump is a piezoelectric ceramic pump.

5. A loop-forming mechanism of a warp knitting machine according to claim 4, wherein An air filter is arranged on the air inlet of the micro air pump.

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