Spinneret plate for para-aramid fiber dry-jet wet spinning

Abstract

A spinneret plate for para-aramid fiber dry-jet wet spinning comprises a spinneret plate body, a supporting component and a limiting component. The spinneret plate comprises an upper edge part, a side wall part and a bottom wall part, the bottom wall part comprises a first area and a second area, a plurality of micropores are formed in the first area of the bottom wall part, and spinning slurry located on one side of the bottom wall part can penetrate to the other side of the bottom wall part through the micropores under the action of pressure. The spinneret plate structure is designed to be composed of the spinneret plate body and the supporting structure, the bottom wall of the spinneret plate body is the plane and is easy to clean, the supporting structure can reinforce the spinneret plate at the bottom of the bottom wall of the spinneret plate, and compared with reinforcing ribs in the prior art, the reinforcing ribs can be thicker, so that the overall compression strength is better, and the service life of the spinneret plate is prolonged. And each part has no cleaning dead angle after being detached, and is easy to clean.

Description

Technical Field

[0001] The utility model relates to the technical field of aramid production, in particular to a spinneret for dry-jet wet spinning of para-aramid. Background Art

[0002] Para-aramid fiber has extremely high strength and modulus, as well as excellent high temperature resistance and corrosion resistance. It is widely used in the production of high-performance ropes and cables. Para-aramid resin is mostly spun by dry-jet wet spinning. The required injection pressure of dry-jet wet spinning is 10-40 bar. The spinning slurry is ejected from the micropores on the surface of the spinneret to form primary fibers of a predetermined size.

[0003] Since the diameter of the micropores at the bottom of the spinneret is small, in order to reduce the difficulty of processing, the thickness of the spinneret is usually several millimeters. In order to adapt to the larger injection pressure, the current solution is usually to set reinforcing ribs on the upper or lower end surface of the spinneret. However, such reinforcing ribs make the surface of the spinneret uneven, making it difficult to clean the residues on the surface of the spinneret. Therefore, it is still necessary to improve this reinforcement scheme. Utility Model Content

[0004] In view of the technical problems existing in the spinneret in the prior art, the first aspect of the utility model proposes a spinneret structure of para-aramid, including a spinneret, a supporting component and a limiting component;

[0005] A spinneret, the spinneret comprising an upper edge portion, a side wall portion and a bottom wall portion, the bottom wall portion comprising a first region and a second region, a plurality of micropores being arranged in the first region of the bottom wall portion, so that the spinning slurry on one side of the bottom wall portion can penetrate through the micropores to the other side of the bottom wall portion under the action of pressure;

[0006] A through hole is provided at the center of the bottom wall portion, the supporting component comprises a rod extending through the through hole toward the upper edge portion and a supporting component at the end of the rod, and the limiting component is configured to be connectable to the rod and the upper edge portion of the spinneret and to limit the distance between the supporting component and the upper edge portion of the spinneret.

[0007] Preferably, the support member is constructed to include a plurality of support bars distributed in a circumferential array along the axis of the rod.

[0008] Preferably, the support bar extends radially from the outer wall of the rod toward the edge of the bottom wall portion.

[0009] Preferably, the thickness of the support bar is greater than its width.

[0010] Preferably, the second area in the bottom wall portion corresponds to a projection area of ​​the support member on the bottom wall portion along the axial direction of the rod.

[0011] Preferably, a limiting hole is provided on the rod, and the limiting component is configured to be rod-shaped. The limiting component can pass through the limiting hole, and both ends thereof abut against the upper edge of the spinneret.

[0012] Preferably, a groove is provided on the upper edge of the spinneret, and when the limiting component is arranged to pass through the limiting hole and the groove, the supporting member is in close contact with the lower end surface of the bottom wall portion.

[0013] Preferably, the axial cross-section of the rod is circular or a regular polygon, and the limiting component comprises a rod-shaped structure with an axial cross-section that is circular or a regular polygon.

[0014] Compared with the prior art, the advantages of the utility model are:

[0015] The utility model designs the spinneret structure to consist of a spinneret main body and a supporting structure. The bottom wall portion of the spinneret main body is flat and easy to clean, and the supporting structure can reinforce the spinneret at the bottom of the bottom wall of the spinneret. Compared with the reinforcing ribs in the prior art, the reinforcing ribs can be set thicker, so that the overall pressure resistance is better, and after disassembly, each component has no cleaning dead corners and is easy to clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of a spinneret in an embodiment of the utility model;

[0017] Figure 2 It is a schematic diagram of the structure of the support member of the embodiment of the utility model;

[0018] Figure 3 It is an assembly diagram of a spinneret according to an embodiment of the utility model. DETAILED DESCRIPTION

[0019] In order to better understand the technical content of the present invention, specific embodiments are described below in conjunction with the accompanying drawings.

[0020] Example

[0021] like Figure 1 and 2 As shown, a spinneret for dry-jet wet spinning of para-aramid fiber includes a spinneret 10, a supporting component 20 and a limiting component 30. The spinneret 10, the supporting component 20 and the limiting component 30 are three separate parts that can be assembled to form a complete spinneret structure. Moreover, each of the spinneret 10, the supporting component 20 and the limiting component 30 has almost no dead corners such as right angles that are difficult to clean.

[0022] The spinneret 10 includes an upper edge portion 11, a side wall portion 12 and a bottom wall portion 13, wherein the side wall portion 12 and the bottom wall portion 13 are hinged at a rounded corner, and the bottom wall portion 13 includes a first area 101 and a second area 102. A plurality of micropores are provided in the first area 101 of the bottom wall portion 13, so that the spinning slurry on one side of the bottom wall portion 13 can penetrate through the micropores to the other side of the bottom wall portion 13 under the action of pressure, while the second area 102 is a solid area without any micropores.

[0023] The spinneret 10 generally has a specific first region 101 and a second region 102 . The micropores arranged in the first region 101 of spinnerets of different types may have differences in pore size and distribution.

[0024] Furthermore, a through hole 131 is provided at the center of the bottom wall portion 13 , and the support component 20 is configured to include a rod 21 extending upward along the portion 11 through the through hole 131 and a support member 22 at the end of the rod 21 .

[0025] In this way, the rod 21 can pass through the through hole 131 from the bottom of the bottom wall portion 13 upward until the support member 22 contacts the bottom wall portion 13 .

[0026] Furthermore, the limiting component 30 is configured to be connected to the rod 21 and the upper edge portion 11 of the spinneret 10 , and to limit the distance between the supporting member 22 and the upper edge portion 11 of the spinneret 10 .

[0027] In this way, the rod 21 is axially positioned by the limiting component 30. At this time, the supporting component 22 supports the bottom wall portion 13, and the pressure exerted on the bottom wall portion 13 is dispersed to the upper edge portion 11 of the spinneret 10, the limiting component 30, and the supporting component 22, so that the bottom wall portion 13 can withstand greater pressure without deformation.

[0028] In an optional embodiment, the support member 22 is constructed to include a plurality of support bars distributed in a circumferential array along the axis of the rod 21 .

[0029] In particular, the support strips extend radially from the outer wall of the rod 21 toward the edge of the bottom wall portion 13 .

[0030] In this way, the support strip can reduce the contact area with the bottom wall portion 13 as much as possible. It should be understood that when the contact area between the support strip and the bottom wall portion 13 is larger, the area of ​​the bottom wall portion 13 where micropores can be arranged is smaller. In order to increase the strength of the support strip, the thickness of the support strip can be greater than the width. Preferably, as Figure 2 As shown, the thickness of the support strip gradually increases from the edge to the rod 21.

[0031] Furthermore, the second area 102 in the bottom wall portion 13 corresponds to the projection area of ​​the support member 22 on the bottom wall portion 13 along the axial direction of the rod 21. In this way, the position of the support strip will not block the micro-holes.

[0032] Further, such as Figure 3 As shown, a limiting hole 23 is provided on the rod 21 , and the limiting component 30 is configured to be rod-shaped. The limiting component 30 can pass through the limiting hole 23 , and both ends thereof abut against the upper edge portion 11 of the spinneret 10 .

[0033] Specifically, the limiting component 30 is a limiting rod. When the limiting rod is inserted into the limiting hole 23 and its two ends abut against the upper edge portion 11 of the spinneret 10, as long as the limiting rod does not deform, the rod 21 cannot slide along the axial direction, that is, the support bar always maintains a supporting force on the bottom wall portion 13.

[0034] In a preferred embodiment, the upper edge portion 11 of the spinneret 10 is provided with a groove 111 , and when the limiting component 30 is arranged to pass through the limiting hole 23 and the groove 111 , the support member 22 is closely attached to the lower end surface of the bottom wall portion 13 .

[0035] In this way, the groove 111 can play a role in circumferential positioning of the limiting component 30, especially when the limiting component 30 is in the groove 111, the axial and circumferential positions of the support member 22 are determined.

[0036] In an optional embodiment, the axial cross-section of the rod 21 is circular or a regular polygon, and the limiting component 30 includes a rod-shaped structure with an axial cross-section that is circular or a regular polygon.

[0037] In combination with the above embodiments, the utility model designs the spinneret structure to consist of a spinneret body and a supporting structure. The bottom wall portion of the spinneret body is flat and easy to clean, and the supporting structure can reinforce the spinneret at the bottom of the bottom wall of the spinneret. Compared with the reinforcing ribs in the prior art, the reinforcing ribs can be set thicker, so that the overall compressive strength is better, and after disassembly, there is no cleaning dead corner for each component, which is easy to clean.

Claims

1. A spinneret for dry-jet wet spinning of para-aramid fiber, characterized in that: It comprises a spinneret (10), a supporting component (20) and a limiting component (30); A spinneret (10), the spinneret (10) comprising an upper edge portion (11), a side wall portion (12) and a bottom wall portion (13), the bottom wall portion (13) comprising a first region (101) and a second region (102), a plurality of micropores being arranged in the first region (101) of the bottom wall portion (13), so that a spinning slurry on one side of the bottom wall portion (13) can penetrate through the micropores to the other side of the bottom wall portion (13) under the action of pressure; A through hole (131) is provided at the center of the bottom wall portion (13); the support component (20) comprises a rod (21) extending through the through hole (131) toward the upper edge portion (11) and a support component (22) at the end of the rod (21); and the limiting component (30) is configured to be connectable to the rod (21) and the upper edge portion (11) of the spinneret (10) and to limit the distance between the support component (22) and the upper edge portion (11) of the spinneret (10).

2. The spinneret for dry-jet wet spinning of para-aramid fiber according to claim 1, characterized in that: The support member (22) is constructed to include a plurality of support bars distributed in a circumferential array along the axis of the rod member (21).

3. The spinneret for para-aramid dry-jet wet spinning according to claim 2, characterized in that: The support bar extends radially from the outer wall of the rod (21) toward the edge of the bottom wall portion (13).

4. The spinneret for dry-jet wet spinning of para-aramid according to claim 2, characterized in that: The support bar has a thickness greater than its width.

5. A spinneret for dry-jet wet spinning of para-aramid according to any one of claims 2 to 4, characterized in that: The second area (102) in the bottom wall portion (13) corresponds to a projection area of ​​the support member (22) on the bottom wall portion (13) along the axial direction of the rod member (21).

6. The spinneret for dry-jet wet spinning of para-aramid according to claim 1, characterized in that: The rod (21) is provided with a limiting hole (23), the limiting component (30) is configured to be rod-shaped, the limiting component (30) can pass through the limiting hole (23), and both ends thereof abut against the upper edge portion (11) of the spinneret (10).

7. The spinneret for dry-jet wet spinning of para-aramid according to claim 6, characterized in that: The upper edge portion (11) of the spinneret (10) is provided with a groove (111), and when the limiting component (30) passes through the limiting hole (23) and the groove (111), the supporting member (22) is in close contact with the lower end surface of the bottom wall portion (13).

8. The spinneret for para-aramid dry-jet wet spinning according to claim 1, characterized in that: The axial cross section of the rod (21) is circular or a regular polygon, and the limiting component (30) comprises a rod-shaped structure with an axial cross section being circular or a regular polygon.

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