Spinneret plate for preparing hollow-section carbon fibers

Abstract

The utility model discloses a spinneret plate for preparing hollow-section carbon fibers. The spinneret plate comprises a first plate body and a second plate body, a plurality of through holes are formed in the first plate body, a plurality of needle-containing cylinders are arranged on the first plate body and correspond to a plurality of micropore-containing through holes formed in the second plate body in a one-to-one mode to form annular containing cavities, and the first plate body and the second plate body are attached to form a pulp inlet channel. The through hole in the first plate body, the slurry inlet channel and the annular containing cavity are sequentially connected to form a passage. Annular grooves are formed in the top and the bottom of the first plate body, and rubber rings are mounted at the top and the bottom of the first plate body and used for sealing the joint of the first plate body and the stock solution feeding pipeline and the joint of the second plate body to prevent liquid leakage. The spinneret plate is provided with the annular containing cavity, is convenient to machine and install, and can be applied to preparation of carbon fiber materials with hollow sections through dry-jet wet spinning.

Description

Technical Field

[0001] The utility model relates to a spinneret for preparing hollow cross-section carbon fibers, belonging to the technical field of carbon fiber production equipment. Background Art

[0002] Hollow fibers are fibers with a hollow cross-section along the axial direction. Due to their unique cross-sectional shape, hollow fibers have a significantly higher surface area than circular cross-sectional fibers, potentially significantly improving their composite properties with the matrix. The hollow cavity within the hollow fiber provides still air, thereby enhancing the fiber's warmth retention and increasing the surface area per unit volume, thereby increasing the fiber's bulkiness. Filling the hollow fiber with hollow elements could yield hollow fibers with specialized functions. Fibers with hollow cross-sections are primarily produced through methods such as melt spinning, electrospinning, and wet spinning.

[0003] The C-shaped and hollow cross-section fibers are the main forms of hollow fibers. The C-shaped cross-section fibers have irregular cross-sections, uneven stress, and poor mechanical properties of the single fibers, while the hollow cross-section fibers are limited by the spinneret and can only be used for melt spinning. Utility Model Content

[0004] To address the difficulty of existing spinnerets in dry-jet wet spinning to produce hollow-section carbon fibers, the present invention provides a spinneret for producing hollow-section carbon fibers. The spinneret's first and second plates are bonded together to form an annular cavity. The spinning solution is extruded through the annular cavity to form a hollow-section solution. This solution is then solidified to form a hollow-section precursor, which is then processed through subsequent processes to produce the hollow-section carbon fibers.

[0005] The utility model describes a spinneret for preparing hollow cross-section carbon fibers, comprising a first plate body 1 and a second plate body 2; the first plate body 1 is provided with a plurality of through holes 4 and a plurality of needle-containing cylinders 8, an annular groove 3 is provided on the top, and an annular groove 5 is provided on the bottom; the second plate body 2 is provided with a plurality of through holes containing micropores 9; the first plate body 1 and the second plate body 2 are fitted together to form a pulp feed channel 6; the needle-containing cylinders 8 on the first plate body and the through holes containing micropores 9 on the second plate body correspond one-to-one to form an annular cavity 7; the through holes 4 are connected to the pulp feed channel 6, and the pulp feed channel 6 is connected to the annular cavity 7; the annular groove 3 and the annular groove 5 are installed with rubber rings; the top of the second plate body 2 is against the bottom of the first plate body 1.

[0006] Furthermore, the top of the first plate body 1 abuts against the raw liquid feed pipe.

[0007] Furthermore, the first plate body 1 and the second plate body 2 are circular in shape.

[0008] Furthermore, the through holes 4 are evenly distributed along the circumferential direction of the first plate body 1 .

[0009] Furthermore, the number of through holes 4 is 1-2K.

[0010] Furthermore, the needle-containing cylinders 8 are located inside the through hole 4 and are evenly distributed along the center of the first plate 1 .

[0011] Furthermore, the number of holes in the needle-containing cylinder 8 is 1-5K, the length of the cylinder is 6-15 mm, the diameter of the cylinder is 3-5 mm, and the diameter of the needle is 0.3-0.8 mm.

[0012] Furthermore, the number of holes in the microporous through hole 9 is 1-5K, the length is 4-10 mm, the diameter is 4-6 mm, and the hole spacing is 1-3 mm; the needle length of the needle cylinder 8 is the same as the length of the micropores in the microporous through hole 9, both of which are 0.3-1.0 mm, the aperture of the micropores in the microporous through hole 9 is 0.5-1.5 mm, and the aspect ratio of the spinneret hole is 1-5:1.

[0013] Furthermore, a rubber ring is installed in the annular groove 3 to seal the connection between the first plate body 1 and the raw liquid feeding pipeline.

[0014] Furthermore, a rubber ring is installed in the annular groove 5 for sealing the connection between the first plate body 1 and the second plate body 2 .

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) The utility model designs a spinneret with an annular cavity structure, so that the spinning solution is squeezed through the annular cavity to form a hollow cross-section solution, which is then solidified to form a hollow cross-section original fiber;

[0017] (2) The utility model has a simple structure and is easy to process and install, and can realize low-cost and rapid preparation of hollow cross-section carbon fibers. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the spinneret;

[0019] Figure 2 for Figure 1 The local enlarged analysis diagram at point I in the middle;

[0020] Figure 3 It is a schematic structural view of the first plate body;

[0021] Figure 4 It is a three-view diagram of the structure of the second plate;

[0022] The reference numerals in the figure are: 1 first plate body, 2 second plate body, 3 annular groove, 4 through hole, 5 annular groove, 6 slurry inlet channel, 7 annular cavity, 8 needle-containing cylinder, 9 micropore-containing through hole. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments and drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] like Figures 1 to 4 As shown, a spinneret for preparing hollow cross-section carbon fibers comprises a first plate 1 and a second plate 2. The first plate 1 is provided with a plurality of through holes 4, a plurality of needle-containing cylinders 8, an annular groove 3 on the top, and an annular groove 5 on the bottom. The second plate 2 is provided with a plurality of through holes 9 containing micropores. The first plate 1 and the second plate 2 are bonded together to form a slurry feed channel 6. The needle-containing cylinders 8 on the first plate correspond to the through holes 9 containing micropores on the second plate in a one-to-one correspondence to form an annular cavity 7. The through holes 4 are connected to the slurry feed channel 6, which is connected to the annular cavity 7. Rubber rings are installed on the annular grooves 3 and 5. The top of the second plate 2 abuts against the bottom of the first plate 1. The top of the first plate 1 abuts against the raw liquid feed pipe.

[0025] Specifically, in this embodiment, the first plate 1 has a circular shape. Through holes 4 are evenly distributed along the circumference of the first plate 1, with a number of 1-2K holes. Needle-containing cylinders 8 are located within the inner periphery of the through holes 4 and evenly distributed along the center of the first plate 1. The number of holes in the needle-containing cylinders 8 is 1-5K, the cylinder length is 6-15 mm, the cylinder diameter is 3-5 mm, the needle length is 0.3-1.0 mm, and the needle diameter is 0.3-0.8 mm.

[0026] Specifically, in this embodiment, the second plate 2 has a circular shape. The number of micropore-containing through-holes 9 is 1-5K, the length is 4-10 mm, the diameter is 4-6 mm, and the spacing between the holes is 1-3 mm. The length of the micropores in the micropore-containing through-holes 9 is the same as the length of the needles in the needle-containing cylinder 8, both being 0.3-1.0 mm. The diameter of the micropores is 0.5-1.5 mm, and the spinneret hole aspect ratio is 1-5:1.

[0027] Specifically, in this embodiment, a rubber ring is installed in the annular groove 3 to seal the connection between the first plate body 1 and the raw liquid feeding pipeline to prevent leakage.

[0028] Specifically, in this embodiment, a rubber ring is installed in the annular groove 5 to seal the connection between the first plate body 1 and the second plate body 2 to prevent liquid leakage.

[0029] The top of the first plate body 1 of the spinneret of the present invention is against the stock solution feed pipe. The spinning stock solution flows into the through hole 4 through the feed pipe, thereby passing through the first plate body 1, and then flows into the pulp inlet channel 6, and then flows into the annular cavity 7, thereby passing through the second plate body 2 and being extruded to obtain a spinning stock solution with a hollow cross section. The hollow cross section stock solution is solidified and drawn to form a primary fiber with a hollow cross section, such as Figure 2 As shown, hollow cross-section carbon fiber is obtained through subsequent processes.

Claims

1. A spinneret for preparing hollow cross-section carbon fibers, characterized in that: The invention comprises a first plate body (1) and a second plate body (2); the first plate body (1) is provided with a plurality of through holes (4), a plurality of needle-containing cylinders (8), an annular groove (3) is provided on the top, and an annular groove (5) is provided on the bottom; the second plate body (2) is provided with a plurality of through holes containing micropores (9); the first plate body (1) and the second plate body (2) are fitted together to form a pulp inlet channel (6); the needle-containing cylinders (8) on the first plate body and the through holes containing micropores (9) on the second plate body correspond one to one to form an annular cavity (7); the through holes (4) are connected to the pulp inlet channel (6), and the pulp inlet channel (6) is connected to the annular cavity (7); the annular groove (3) and the annular groove (5) are installed with rubber rings; the top of the second plate body (2) is pressed against the bottom of the first plate body (1).

2. The spinneret according to claim 1, characterized in that The top of the first plate body (1) is against the raw liquid feed pipe.

3. The spinneret according to claim 1, characterized in that The first plate body (1) and the second plate body (2) are circular in shape.

4. The spinneret according to claim 1, characterized in that The through holes (4) are evenly distributed along the circumferential direction of the first plate body (1).

5. The spinneret according to claim 1, characterized in that The number of through holes (4) is 1-2K.

6. The spinneret according to claim 1, characterized in that The needle-containing cylinders (8) are located within the inner periphery of the through hole (4) and are evenly distributed along the center of the first plate body (1).

7. The spinneret according to claim 1, characterized in that The number of holes in the needle-containing cylinder (8) is 1-5K, the length of the cylinder is 6-15 mm, the diameter of the cylinder is 3-5 mm, and the diameter of the needle is 0.3-0.8 mm.

8. The spinneret according to claim 1, characterized in that The number of holes in the microporous through hole (9) is 1-5K, the length is 4-10 mm, the diameter is 4-6 mm, and the hole spacing is 1-3 mm; the needle length of the needle cylinder (8) is the same as the length of the micropores in the microporous through hole (9), both of which are 0.3-1.0 mm, the pore diameter of the micropores in the microporous through hole (9) is 0.5-1.5 mm, and the aspect ratio of the spinneret hole is 1-5:

1.

9. The spinneret according to claim 1, characterized in that A rubber ring is installed in the annular groove (3) for sealing the connection between the first plate body (1) and the raw liquid feed pipe.

10. The spinneret according to claim 1, characterized in that A rubber ring is installed in the annular groove (5) for sealing the connection between the first plate body (1) and the second plate body (2).

Images