Spinneret plate for polyacrylonitrile fiber production

Abstract

The utility model relates to the technical field of small-tow polyacrylonitrile-based precursor production, and discloses a spinneret plate for polyacrylonitrile fiber production, which comprises a spinneret plate main body and an arranged spinneret ring plate, a rotating groove is formed in the center of the inner wall of the spinneret plate body, and inlets and outlets are formed in the two sides of the top end of the spinneret plate body upwards. And the annular outer plate corresponds to the annular groove, and a rotating side plate is installed at the center of the front face and the back face of the spinning annular plate and corresponds to the rotating groove and the inlet and outlet. According to the dry-jet wet-spinning spinneret plate for small-tow polyacrylonitrile-based precursor production, after the spinneret plate body is installed on a production device, the appropriate spinneret ring plate is selected according to production requirements, the spinneret ring plate is inserted into the inner cavity of the spinneret plate body, the annular outer plate is attached to the annular groove, and the spinneret plate body is fixed to the spinneret plate body. And the rotating side plate enters the annular groove through the inlet and outlet to rotate, so that the rotating side plate and the inlet and outlet are staggered. And overall replacement is not needed.

Description

Technical Field

[0001] The utility model relates to the technical field of small-tow polyacrylonitrile-based raw silk production, in particular to a spinneret for polyacrylonitrile fiber production. Background Art

[0002] Small-tow polyacrylonitrile-based precursor, as the raw material fiber for manufacturing polyacrylonitrile-based carbon fiber, has its unique characteristics and applications. Small-tow polyacrylonitrile-based precursor refers to the polyacrylonitrile-based fiber raw material with a carbon fiber tow specification lower than 24K. This precursor undergoes specific process treatment during the manufacturing process to meet the needs of subsequent carbon fiber production. The production process of small-tow polyacrylonitrile-based precursor usually includes: raw material preparation, spinning process and subsequent treatment. In order to improve the uniformity of the fiber, enhance the fiber strength and improve the production efficiency, the dry-jet wet spinning spinneret is required in the production of small-tow polyacrylonitrile-based precursor.

[0003] The common dry-jet wet spinning spinneret for small-tow polyacrylonitrile-based precursor production is usually composed of a spinneret body, a spinneret area, a spinneret hole, and an airflow channel. The spinning solution is extruded and formed into fibers through the spinneret area, and then the spinneret hole ensures that the spinning solution can be smoothly extruded and formed into high-quality fibers. The airflow channel helps to optimize the airflow distribution and temperature control during the spinning process, and improve the spinning efficiency and fiber quality.

[0004] In the conventional dry-jet wet-spinning spinneret for producing small-tow polyacrylonitrile-based precursor, the size and shape of the spinneret holes on the spinneret body are usually fixed, and the spinneret body and the spinneret holes cannot be adjusted. At the same time, the size and shape of the spinneret holes will affect the quality of the small-tow polyacrylonitrile-based precursor produced. In order to solve the above problems, some dry-jet wet-spinning spinnerets for producing small-tow polyacrylonitrile-based precursors are provided with multiple groups of spinnerets with spinneret holes of different sizes and shapes, and the spinnerets are replaced on the production device according to the needs of production and processing, thereby ensuring the quality of the small-tow polyacrylonitrile-based precursor produced. However, in this way, since the spinneret needs to be disassembled and replaced as a whole from the production device, it will not only lead to a large workload and inconvenience in operation, but also increase the production cost due to the overall replacement of multiple groups of spinnerets. For this reason, a spinneret for producing polyacrylonitrile fibers is proposed. Utility Model Content

[0005] Technical issues solved

[0006] In view of the deficiencies in the prior art, the utility model provides a spinneret for polyacrylonitrile fiber production to solve the technical problem that the spinneret must be disassembled and replaced as a whole from the production device, which not only results in a large workload and inconvenience in operation, but also increases production costs.

[0007] (II) Technical solution

[0008] In order to achieve the above-mentioned purpose, the utility model provides the following technical solution: a spinneret for producing polyacrylonitrile fiber, comprising:

[0009] A spinneret body and a spinneret ring plate arranged at the center of the top of the spinneret body, wherein the spinneret body and the spinneret ring plate are connected by an insertion, and spinneret holes are evenly opened on the top of the spinneret ring plate;

[0010] An annular groove is arranged at the top center of the spinneret body, a rotating groove is opened at the center of the inner wall of the spinneret body, and an inlet and outlet are opened upwardly on both sides of the top of the rotating groove;

[0011] The annular outer plate is arranged on the upper outer side of the spinneret ring plate, and corresponds to the positional relationship and shape of the annular groove, and a rotating side plate is installed at the center of the front and back sides of the spinneret ring plate, and corresponds to the positional relationship and shape of the rotating groove and the inlet and outlet. After the spinneret main body is installed on the production device, a suitable spinneret ring plate is selected according to production requirements, and the spinneret ring plate is inserted into the inner cavity of the spinneret main body, the annular outer plate fits the annular groove, and the rotating side plate enters the annular groove through the inlet and outlet to rotate inside the annular groove, so that the rotating side plate is misaligned with the inlet and outlet, and then the production and processing are carried out through the spinneret holes on the spinneret ring plate. On the one hand, when replacing according to production needs, there is no need to replace the spinneret body as a whole. It is only necessary to remove the spinneret ring plate from the spinneret body to carry out the replacement operation to meet the different needs of small-bundle polyacrylonitrile-based precursor fibers in production. At the same time, there is no need to replace the entire body, which not only reduces the workload of disassembly and assembly, but also reduces the production cost. On the other hand, the rotating card connection method not only simplifies the replacement operation steps, but also ensures the stability of the connection between the spinneret body and the spinneret ring plate.

[0012] Preferably, a positioning side cylinder is provided just above the center of the front and rear ends of the top of the spinneret body, and a connecting plate is installed at the bottom of the positioning side cylinder and connected to the spinneret body. The positioning side cylinder can be connected to the corresponding structure.

[0013] Preferably, a cylindrical groove is provided at the center of the inner cavity of the positioning side cylinder, and a guide rod is provided in the inner cavity of the cylindrical groove, and the front end of the guide rod passes through the inner wall of the positioning side cylinder and extends outward. The guide rod can move in the cylindrical groove of the positioning side cylinder.

[0014] Preferably, a limit plate is installed at the rear end of the guide rod, and the outer side of the limit plate is tightly fitted with the inner wall of the positioning side cylinder, and a return spring is sleeved on the outer surface of the rear end of the guide rod. The guide rod can drive the limit plate to move and rotate in the inner cavity of the positioning side cylinder.

[0015] Preferably, the two ends of the reset spring are respectively tightly fitted with the limit plate and the inner wall of the positioning side tube, and a limit block is provided around the front end outer surface of the guide rod. The guide rod can drive the limit plate to move outward in the inner cavity of the positioning side tube to squeeze the reset spring and make the limit block and the connection structure tightly fit.

[0016] Preferably, a positioning side block is added just above the center position of the front and rear ends of the top of the spinneret ring plate, and a connecting column is installed at the bottom of the positioning side block, which is connected to the top of the spinneret ring plate, and a limiting groove is provided at the front center of the positioning side block, which corresponds to the guide rod and the limiting block. When the spinneret ring plate rotates to a certain angle on the spinneret main body, the positioning side block is aligned with the positioning side cylinder, and the externally pulled guide rod drives the limiting plate to move outward in the inner cavity of the positioning side cylinder, squeezes the reset spring, and makes the limiting block pass through the limiting groove to enter the inner side of the positioning side block, and then rotates the guide rod and the limiting plate, so that the limiting block is misaligned with the limiting groove, and the limiting block is tightly fitted with the inner side of the positioning side block under the action of the guide rod, the limiting plate and the reset spring. It can not only ensure the stability of the connection between the spinneret main body and the spinneret ring plate, avoid the spinneret ring plate from rotating on the spinneret main body, and the spinneret main body and the spinneret ring plate are separated and fall off, but also facilitate the disassembly and assembly operation between the positioning side block and the positioning side cylinder.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the utility model provides a spinneret for producing polyacrylonitrile fibers, which has the following beneficial effects:

[0019] The dry-jet wet-spinning spinneret for producing small-bundle polyacrylonitrile-based precursor is provided by first installing the spinneret body on the production device, selecting a suitable spinneret ring plate according to production requirements, inserting the spinneret ring plate into the inner cavity of the spinneret body, and fitting the annular outer plate with the annular groove, while the rotating side plate enters the inner part of the annular groove through the inlet and outlet to rotate, so that the rotating side plate is misaligned with the inlet and outlet. When replacing according to production requirements, there is no need to replace the spinneret body as a whole, and only the spinneret ring plate needs to be removed from the spinneret body to perform the replacement operation, so as to meet the different requirements of small-bundle polyacrylonitrile-based precursor during production. At the same time, there is no need to replace the whole body, which not only reduces the workload of disassembly and assembly, but also reduces the production cost, and then the production and processing are carried out through the spinneret holes on the spinneret ring plate. The rotating card connection method not only simplifies the replacement operation steps, but also ensures the stability of the connection between the spinneret body and the spinneret ring plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2This is a schematic diagram of the main structure of the spinneret of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the spinneret ring plate of the utility model;

[0023] Figure 4 This is a schematic diagram of the positioning side block and its connection structure of the utility model;

[0024] Figure 5 This is a cross-sectional view of the positioning side tube of the utility model and a schematic diagram of its connection structure.

[0025] In the figure: 1. spinneret body; 2. spinneret ring plate; 3. annular groove; 4. rotating groove; 5. inlet and outlet; 6. positioning side cylinder; 7. spinneret hole; 8. annular outer plate; 9. rotating side plate; 10. positioning side block; 11. limiting groove; 12. connecting column; 13. connecting plate; 14. cylindrical groove; 15. guide rod; 16. limiting plate; 17. reset spring; 18. limiting block. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] The utility model provides a technical solution, a spinneret for producing polyacrylonitrile fiber, comprising: Figure 1 , a spinneret body 1, and a spinneret ring plate 2 arranged at the top center of the spinneret body 1, and an insertion connection is arranged between the spinneret body 1 and the spinneret ring plate 2, and spinneret holes 7 are evenly opened on the top of the spinneret ring plate 2;

[0028] See also Figure 2 , an annular groove 3 is arranged at the top center of the spinneret body 1, and a rotating groove 4 is opened at the center of the inner wall of the spinneret body 1, and an inlet and outlet 5 are opened upward on both sides of the top of the rotating groove 4;

[0029] See also Figure 3The annular outer plate 8 is arranged on the upper outer side of the spinneret ring plate 2, and corresponds to the positional relationship and shape of the annular groove 3, and a rotating side plate 9 is installed at the center of the front and back sides of the spinneret ring plate 2, and corresponds to the positional relationship and shape of the rotating groove 4 and the inlet and outlet 5. After the spinneret body 1 is installed on the production device, a suitable spinneret ring plate 2 is selected according to production requirements, and the spinneret ring plate 2 is inserted into the inner cavity of the spinneret body 1, the annular outer plate 8 fits with the annular groove 3, and the rotating side plate 9 enters the inner part of the annular groove 3 through the inlet and outlet 5 to rotate, so that the rotating side plate 9 is misaligned with the inlet and outlet 5, and then the spinneret holes 7 on the spinneret ring plate 2 are used for production and processing. On the one hand, when replacing according to production needs, there is no need to replace the spinneret body 1 as a whole. It is only necessary to remove the spinneret ring plate 2 from the spinneret body 1 to perform the replacement operation to meet the different needs of small-bundle polyacrylonitrile-based precursor fibers in production. At the same time, there is no need to replace the entire body, which not only reduces the workload of disassembly and assembly, but also reduces the production cost. On the other hand, by using the rotating card connection method, not only the replacement operation steps are simplified, but also the stability of the connection between the spinneret body 1 and the spinneret ring plate 2 is ensured.

[0030] See also Figure 5 , a positioning side tube 6 is added just above the center position of the front and rear ends of the top of the spinneret body 1, and a connecting plate 13 is installed at the bottom of the positioning side tube 6 and connected to the spinneret body 1. The positioning side tube 6 can be connected to the corresponding structure. A cylindrical groove 14 is opened in the center of the inner cavity of the positioning side tube 6, and a guide rod 15 is added to the inner cavity of the cylindrical groove 14, and the front end of the guide rod 15 passes through the inner wall of the positioning side tube 6 and extends outward. The guide rod 15 can move in the cylindrical groove 14 of the positioning side tube 6. A limiting plate 16 is installed at the rear end of the guide rod 15, and the outer side of the limiting plate 16 is tightly fitted with the inner wall of the positioning side tube 6, and a reset spring 17 is sleeved on the outer surface of the rear end of the guide rod 15. The guide rod 15 can drive the limiting plate 16 to move and rotate in the inner cavity of the positioning side tube 6. The two ends of the return spring 17 are respectively tightly fitted between the limit plate 16 and the inner wall of the positioning side tube 6, and a limit block 18 is provided around the outer surface of the front end of the guide rod 15. The guide rod 15 can drive the limit plate 16 to move outward in the inner cavity of the positioning side tube 6, squeeze the return spring 17, and make the limit block 18 and the connection structure tightly fit.

[0031] See also Figure 4, a positioning side block 10 is added just above the center position of the front and rear ends of the top of the spinneret ring plate 2, and a connecting column 12 is installed at the bottom of the positioning side block 10, and is connected to the top of the spinneret ring plate 2. A limiting groove 11 is provided at the front center of the positioning side block 10, and corresponds to the guide rod 15 and the limiting block 18. When the spinneret ring plate 2 is rotated to a certain angle on the spinneret body 1, the positioning side block 10 is aligned with the positioning side cylinder 6, and the guide rod 15 is pulled outward to drive the limiting plate 16 to move outward in the inner cavity of the positioning side cylinder 6, and the reset spring 17 is squeezed, and the limiting block 18 enters the inner side of the positioning side block 10 through the limiting groove 11, and then the guide rod 15 and the limiting plate 16 are rotated to make the limiting block 18 misaligned with the limiting groove 11, and the limiting block 18 is tightly fitted with the inner side of the positioning side block 10 under the action of the guide rod 15, the limiting plate 16 and the reset spring 17. It not only ensures the stability of the connection between the spinneret body 1 and the spinneret ring plate 2, prevents the spinneret ring plate 2 from rotating on the spinneret body 1 and separating and falling off the spinneret body 1 and the spinneret ring plate 2, but also facilitates the disassembly and assembly operations between the positioning side block 10 and the positioning side cylinder 6.

[0032] This solution: After the spinneret body 1 is installed on the production device, a suitable spinneret ring plate 2 is selected according to production requirements, and the spinneret ring plate 2 is inserted into the inner cavity of the spinneret body 1, the annular outer plate 8 is fitted with the annular groove 3, and the rotating side plate 9 enters the annular groove 3 through the inlet and outlet 5 and rotates, so that the rotating side plate 9 is misaligned with the inlet and outlet 5, and then the production and processing is carried out through the spinneret hole 7 on the spinneret ring plate 2. When the spinneret ring plate 2 is rotated to a certain angle on the spinneret body 1, the positioning side block 10 is aligned with the positioning side tube 6, and the guide rod 15 is pulled outward to drive the limit plate 16 to move outward in the inner cavity of the positioning side tube 6, squeezing the return spring 17, and allowing the limit block 18 to pass through the limit groove 11 and enter the inner side surface of the positioning side block 10, then the guide rod 15 and the limit plate 16 are rotated to make the limit block 18 misaligned with the limit groove 11, and the limit block 18 is tightly fitted with the inner side surface of the positioning side block 10 under the action of the guide rod 15, the limit plate 16 and the return spring 17.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A spinneret for producing polyacrylonitrile fiber, characterized in that: include: A spinneret body (1), and a spinneret ring plate (2) arranged at the top center of the spinneret body (1), wherein the spinneret body (1) and the spinneret ring plate (2) are connected by an insertion connection, and spinneret holes (7) are evenly opened on the top of the spinneret ring plate (2); An annular groove (3) is arranged at the top center position of the spinneret body (1), a rotating groove (4) is opened at the center position of the inner wall of the spinneret body (1), and an inlet and outlet (5) are opened upwardly on both sides of the top of the rotating groove (4); The annular outer plate (8) is arranged on the upper outer side of the spinneret ring plate (2) and corresponds to the positional relationship and shape of the annular groove (3). A rotating side plate (9) is installed at the center of the front and back sides of the spinneret ring plate (2) and corresponds to the positional relationship and shape of the rotating groove (4) and the inlet and outlet (5).

2. The spinneret for producing polyacrylonitrile fiber according to claim 1, characterized in that: A positioning side cylinder (6) is provided just above the center position of the front and rear ends of the top of the spinneret body (1), and a connecting plate (13) is installed at the bottom of the positioning side cylinder (6) and is connected to the spinneret body (1).

3. The spinneret for producing polyacrylonitrile fiber according to claim 2, characterized in that: A cylindrical groove (14) is provided at the center of the inner cavity of the positioning side cylinder (6), and a guide rod (15) is provided in the inner cavity of the cylindrical groove (14). The front end of the guide rod (15) penetrates the inner wall of the positioning side cylinder (6) and extends outward.

4. The spinneret for producing polyacrylonitrile fiber according to claim 3, characterized in that: A limit plate (16) is installed at the rear end of the guide rod (15), and the outer side of the limit plate (16) is tightly fitted with the inner wall of the positioning side cylinder (6). A return spring (17) is sleeved on the outer surface of the rear end of the guide rod (15).

5. The spinneret for producing polyacrylonitrile fiber according to claim 4, characterized in that: The two ends of the return spring (17) are respectively tightly fitted with the limit plate (16) and the inner wall of the positioning side tube (6), and a limit block (18) is provided around the outer surface of the front end of the guide rod (15).

6. The spinneret for producing polyacrylonitrile fiber according to claim 5, characterized in that: A positioning side block (10) is provided just above the center position of the front and rear ends of the top of the spinneret ring plate (2), and a connecting column (12) is installed at the bottom of the positioning side block (10) and is connected to the top of the spinneret ring plate (2). A limiting groove (11) is provided at the center of the front side of the positioning side block (10) and corresponds to the guide rod (15) and the limiting block (18).

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