A hollow spindle for spinning in vortex spinning equipment

Abstract

The present invention relates to a hollow spindle for spinning in a vortex spinning device, and belongs to the technical field of vortex textiles. The hollow spindle includes a hollow spindle body, a yarn guide hole, a yarn lead tube and a yarn feed hole; the hollow spindle body is hollow inside, and a yarn guide hole is opened along the axial direction, and the yarn guide hole passes through the hollow spindle body; a yarn feed hole is provided at the front end of the yarn guide hole; and the yarn lead tube is also connected to the rear end of the hollow spindle body. The present invention has a simple and reasonable structure, has a good yarn-forming effect, has a good yarn wrapping effect, has no core-exposed yarn phenomenon, has uniform yarn dryness, and has good quality.

Description

Technical Field

[0001] The invention relates to a hollow spindle for spinning with a vortex spinning device, belonging to the technical field of vortex spinning. Background Art

[0002] Vortex spinning is developed on the basis of air-jet spinning. It is a new spinning method that uses a fixed vortex spinning tube to replace the high-speed rotating spinning cup for spinning. Air-jet vortex spinning uses the rotation of air to make the long fibers gather toward the center of the yarn, and the short fibers are dispersed and coated on the outer layer. This unique production method can not only produce core-spun yarn, but also produce double-structured yarn using different fiber lengths and shrinkage degrees. It can spin colorful special yarns with less hairiness, high density, good refreshing feel, good washing resistance, good moisture retention and bulkiness. The existing vortex spinning tube includes vortex tubes, guide needles, hollow spindles and other components. In the yarn-forming process of jet vortex spinning, the free-end fiber "falls over" on the wall of the hollow spindle and rotates under the action of high-pressure airflow, and the front end of the fiber is gradually pulled together in the hollow spindle. The movement of the fiber is affected by the morphological structure and size specifications of the hollow spindle. Therefore, the development of a hollow spindle that can make the vortex-spun yarn have good wrapping effect and yarn uniformity has an important role in promoting the jet vortex spinning technology. Summary of the invention

[0003] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide a hollow spindle for spinning in a vortex spinning device, which adopts a conical yarn inlet hole and arranges a non-smooth friction surface on the side wall of the yarn inlet hole, combined with the smooth outer wall of the hollow spindle, to solve the problems of unsatisfactory yarn wrapping effect and poor yarn uniformity of the existing hollow spindle.

[0004] The technical solution of the present invention is a hollow spindle for spinning in a vortex spinning device, comprising a hollow spindle body, a yarn guide hole, a yarn lead tube and a yarn feed hole; the hollow spindle body is hollow inside, and has a yarn guide hole opened axially, and the yarn guide hole passes through the hollow spindle body; a yarn feed hole is provided at the front end of the yarn guide hole; and the yarn lead tube is also connected to the rear end of the hollow spindle body.

[0005] As a preferred solution of the present invention, the top of the hollow ingot body is horizontal, and it consists of a first frustum, a second frustum and a cylinder; the bottom surface of the first frustum coincides with the top surface of the second frustum, and the bottom surface of the second frustum is the top surface of the cylinder.

[0006] As a preferred solution of the present invention, the yarn guide tube comprises a first cylinder and a second cylinder; the first cylinder and the second cylinder are connected, and the diameter of the second cylinder is greater than the diameter of the first cylinder;

[0007] The top end of the first cylinder is embedded in the front end of the second truncated cone; the yarn guide hole passes through the first truncated cone and the first cylinder.

[0008] As a preferred solution of the present invention, the second truncated cone, the cylinder and the second cylinder are all hollow inside.

[0009] As a preferred solution of the present invention, the yarn inlet hole is in the shape of an inverted truncated cone, with a length of 3.5-8 mm and a cone angle of 5-15°; and the side wall of the yarn inlet hole is a non-smooth friction surface.

[0010] As a preferred solution of the present invention, the length of the yarn inlet hole is 4-4.6 mm; the cone angle is 8-12°.

[0011] As a preferred solution of the present invention, the side wall of the yarn inlet hole is provided with concave-convex stripes along the axial direction of the hollow spindle body; the concave-convex stripes are evenly distributed around the side wall of the yarn inlet hole.

[0012] As a preferred solution of the present invention, a nickel-based wear-resistant layer is laser-clad on the front end of the hollow ingot body.

[0013] Beneficial effects of the invention: The invention has a simple and reasonable structure, has a good yarn-forming effect, has a good yarn wrapping effect, has no core-exposed yarn phenomenon, has uniform yarn dryness, and has good quality.

[0014] During the spinning process, the front end of the fiber is gathered in the yarn guide hole and is not affected by the vortex airflow in the vortex chamber. The tail end of the fiber is a free end. Under the action of the vortex airflow in the vortex chamber, the fiber spirally adheres to the outer wall of the hollow spindle body and is continuously gathered in the hollow spindle body to form a core-spun yarn with a straight core spirally wrapped by the outer fiber.

[0015] A smooth arc-shaped corner is arranged on the outer side of the front end of the hollow ingot body of the present invention, so as to reduce the friction between the free end of the fiber and the hollow ingot body, so that the free end of the fiber forms a good spiral wrapping effect under the action of the eddy airflow; a conical yarn inlet hole is arranged at the front end of the yarn guide hole, so that the outer wrapped fiber has a certain degree of freedom in the initial stage of entering the hollow ingot body, and under the action of the friction force of the side wall of the yarn inlet hole, the outer wrapped fiber is more evenly distributed in the circumferential direction of the core wire, so as to avoid the core wire from being exposed, and the spun yarn has uniform dryness. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the structure of the present invention.

[0018] Figure 2 This is a partial enlarged view of point A.

[0019] Explanation of the accompanying drawings: 1. hollow spindle body; 1-1. first truncated cone; 1-2. second truncated cone; 1-3. cylinder; 2. yarn guide hole; 3. yarn guide tube; 3-1. first cylinder; 3-2. second cylinder; 4. yarn inlet hole. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] A hollow spindle for spinning in a vortex spinning device comprises a hollow spindle body 1, a yarn guide hole 2, a yarn lead tube 3 and a yarn feed hole 4; the hollow spindle body 1 is hollow inside, and has a yarn guide hole 2 opened axially, and the yarn guide hole 2 passes through the hollow spindle body 1; a yarn feed hole 4 is provided at the front end of the yarn guide hole 2; the yarn lead tube 3 is also connected to the rear end of the hollow spindle body 1.

[0022] The top of the hollow ingot body 1 is horizontal, and it consists of a first frustum 1-1, a second frustum 1-2 and a cylinder 1-3; the bottom surface of the first frustum 1-1 coincides with the top surface of the second frustum 1-2, and the bottom surface of the second frustum 1-2 is the top surface of the cylinder 1-3.

[0023] The yarn guide tube 3 includes a first cylinder 3-1 and a second cylinder 3-2; the first cylinder 3-1 and the second cylinder 3-2 are connected, and the diameter of the second cylinder 3-2 is greater than the diameter of the first cylinder 3-1;

[0024] The top end of the first cylinder 3-1 is embedded in the front end of the second truncated cone 1-2; the yarn guide hole 2 passes through the first truncated cone 1-1 and the first cylinder 3-1.

[0025] The second cone 1-2, the cylinder 1-3 and the second cylinder 3-2 are all hollow inside.

[0026] The yarn inlet hole 4 is located at the front end of the hollow spindle body 1 and presents a gradually enlarged truncated cone structure. If the cone angle of the yarn inlet hole 4 is too large or the length is too long, it is easy to cause the front end of the fiber to have a high degree of freedom, and the fiber will unwind in the yarn inlet hole 4, affecting the spiral wrapping effect; if the cone angle of the yarn inlet hole 4 is too small or the length is too small, it is easy to cause the fiber to be "squeezed to death" when entering the yarn inlet hole 4, and the circumferential distribution cannot be adjusted. There are too many fibers distributed on one side, resulting in the core wire being exposed. After many experiments, the length of the yarn inlet hole 4 is preferably 3.5-8mm, preferably 4-4.6mm. The cone angle of the yarn inlet hole 4 is preferably 5-15°, preferably 8-12°. The side wall of the yarn inlet hole 4 is a non-smooth friction surface.

[0027] In order to increase the circumferential friction between the side wall of the yarn inlet hole 4 and the fibers and to evenly distribute the fibers circumferentially, concave-convex stripes are provided on the side wall of the yarn inlet hole 4 along the axial direction of the hollow spindle body 1; the concave-convex stripes are evenly distributed around the side wall of the yarn inlet hole 4.

[0028] In order to improve the wear resistance of the front end of the hollow ingot body 1 , a nickel-based wear-resistant layer is laser clad on the front end of the hollow ingot body 1 .

[0029] The invention has a simple and reasonable structure, good yarn-forming effect, good yarn wrapping effect, no core-exposed yarn phenomenon, uniform yarn and good quality. During the spinning process, the front end of the fiber is gathered in the yarn guide hole 2, and is not affected by the vortex airflow of the vortex chamber. The tail end of the fiber is a free end. Under the action of the vortex airflow of the vortex chamber, the fiber spirally adheres to the outer wall surface of the hollow ingot body 1, and as it is continuously gathered in the hollow ingot body 1, a core-spun yarn with a straight core spirally wrapped by the outer fiber is formed.

[0030] A smooth arc-shaped corner is arranged on the outer side of the front end of the hollow ingot body 1 of the present invention, so as to reduce the friction between the free end of the fiber and the hollow ingot body 1, so that the free end of the fiber forms a good spiral wrapping effect under the action of the eddy airflow; a conical yarn inlet hole 4 is arranged at the front end of the yarn guide hole 2, so that the outer wrapped fiber has a certain degree of freedom in the initial stage of entering the hollow ingot body 1, and under the action of the friction force of the side wall of the yarn inlet hole 4, the outer wrapped fiber is more evenly distributed in the circumferential direction of the core wire, so as to avoid the core wire from being exposed and the spun yarn has uniform dryness.

[0031] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hollow spindle for spinning in a vortex spinning device, characterized in that: The hollow spindle comprises a hollow spindle body (1), a yarn guide hole (2), a yarn lead-in tube (3) and a yarn inlet hole (4); the hollow spindle body (1) is hollow inside and has a yarn guide hole (2) opened along the axial direction, the yarn guide hole (2) passing through the hollow spindle body (1); a yarn inlet hole (4) is provided at the front end of the yarn guide hole (2); and the rear end of the hollow spindle body (1) is also connected to the yarn lead-in tube (3); The top of the hollow ingot body (1) is horizontal, and it consists of a first truncated cone (1-1), a second truncated cone (1-2) and a cylinder (1-3); the bottom surface of the first truncated cone (1-1) coincides with the top surface of the second truncated cone (1-2), and the bottom surface of the second truncated cone (1-2) is the top surface of the cylinder (1-3); The yarn guide tube (3) comprises a first cylinder (3-1) and a second cylinder (3-2); the first cylinder (3-1) and the second cylinder (3-2) are connected, and the diameter of the second cylinder (3-2) is greater than the diameter of the first cylinder (3-1); The top end of the first cylinder (3-1) is embedded in the front end of the second truncated cone (1-2); the yarn guide hole (2) passes through the first truncated cone (1-1) and the first cylinder (3-1); The second truncated cone (1-2), the cylinder (1-3) and the second cylinder (3-2) are all hollow inside; The yarn inlet hole (4) is in the shape of an inverted truncated cone, with a length of 4-4.6 mm and a cone angle of 8-12°; the side wall of the yarn inlet hole (4) is a non-smooth friction surface; The side wall of the yarn inlet hole (4) is provided with concave-convex stripes along the axial direction of the hollow spindle body (1); the concave-convex stripes are evenly distributed around the side wall of the yarn inlet hole (4).

2. The hollow spindle for spinning in a vortex spinning device as claimed in claim 1, characterized in that: The front end of the hollow ingot body (1) is laser-clad with a nickel-based wear-resistant layer.

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