Spinneret cap

Abstract

The utility model discloses a spinneret cap which is characterized in that a bottom plate comprises a silk inlet surface and a silk outlet surface, a plurality of spinneret orifices are arranged on the bottom plate, each spinneret orifice sequentially comprises a first section, a second section and a third section from the silk inlet surface to the silk outlet surface, the first section is cylindrical, the second section is conical, the third section is cylindrical, and the first section is conical. And the diameter of the third section is smaller than that of the first section. According to the utility model, the three-section spinneret orifices are arranged, and the diameters of the spinneret orifices are sequentially reduced, so that the spinning performance of the spinneret cap is good, and the bearable working pressure of the spinneret cap is larger than that of a traditional spinneret cap.

Description

Technical Field

[0001] This utility model relates to the field of carbon fiber, and in particular to a spinneret cap. Background Technology

[0002] The function of a spinneret is to transform a viscous polymer melt or solution into a fine stream with a specific cross-sectional shape through micropores, which then solidifies into filaments through a solidification medium such as air or a solidification bath. Depending on the type and specifications of the fiber, different specifications, shapes, pore types, and materials are available. Spinnerets operate at high temperatures and pressures, requiring pressure resistance, corrosion resistance, and sufficient mechanical strength. Traditional spinnerets have a fixed orifice diameter that is uniformly distributed on the base plate. During operation, the filament output from the spinneret orifices is easily affected by the output from adjacent orifices, leading to filament sticking. Utility Model Content

[0003] The main objective of this invention is to solve the technical problems described in the background section.

[0004] To achieve the above objectives, this utility model provides a spinneret cap, including a base plate. The base plate includes an inlet surface and an outlet surface. The base plate is provided with a plurality of spinneret holes. The spinneret holes, from the inlet surface to the outlet surface, include a first section, a second section, and a third section in sequence. The first section is cylindrical, the second section is conical, and the third section is cylindrical. The diameter of the third section is smaller than the diameter of the first section.

[0005] In one embodiment, the base plate is divided into a first region, a second region, a third region, and a fourth region, each region having the same number of spinnerets that are evenly distributed, and the intervals between each region having no holes.

[0006] In one embodiment, the base plate is provided with a central region, the central region is non-perforated, the central region is connected to the interval region, and the first region, the second region, the third region and the fourth region are evenly distributed around the central region.

[0007] In one embodiment, each of the interval regions has two spinnerets at one end near the central region.

[0008] In one embodiment, the diameter of the end of the second segment near the infeed surface is equal to the diameter of the first segment, and the diameter of the end of the second segment near the outfeed surface is equal to the diameter of the third segment.

[0009] In one embodiment, the central axes of the first, second, and third segments are on the same straight line.

[0010] In one embodiment, the diameter of the first segment is 0.5-3 mm, and the diameter of the third segment is 0.01-0.15 mm.

[0011] In one embodiment, the height of the first segment is 3-20 mm, the diameter of the second segment is 0.25-1.5 mm, the diameter of the third segment is 0.03-0.5 mm, and the sum of the heights of the first, second, and third segments is equal to the thickness of the base plate.

[0012] In one embodiment, the base plate is a circular plate with a diameter of 20-200 mm and a thickness of 3-20 mm.

[0013] In one embodiment, baffles are provided around the base plate.

[0014] This invention features a three-section spinneret with progressively smaller diameters. The raw material inside the spinneret is affected by the pressure within the spinneret, resulting in superior spinning performance. Furthermore, the multi-regional distribution means that the areas without spinnerets act as reinforcing ribs, giving the spinneret high rigidity, strong pressure resistance, minimal deformation, and the ability to withstand greater working pressure than traditional spinnerets. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a front view of the spinneret cap in one embodiment of the present invention;

[0017] Figure 2 for Figure 1 A cross-sectional schematic diagram of BB;

[0018] Figure 3 for Figure 2 Enlarged diagram of section A in the middle;

[0019] Figure 4 This is a reverse view of the spinneret cap in one embodiment of the present invention;

[0020] Figure 5 This is a three-dimensional schematic diagram of a spinneret cap according to one embodiment of the present invention;

[0021] Explanation of key component symbols:

[0022] 1-Base plate; 2-Spinneret hole; 21-First section; 22-Second section; 23-Third section; 3-First area; 4-Second area; 5-Third area; 6-Fourth area. Detailed Implementation

[0023] To better understand the above technical solutions, exemplary embodiments of this disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art.

[0024] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0025] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the coordinate system shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0028] This utility model provides a spinneret cap, as shown in the reference. Figure 1-5 In one embodiment, the spinneret includes a base plate 1, which includes an inlet surface and an outlet surface. The base plate 1 is provided with a plurality of spinneret holes 2. The spinneret holes 2 include a first section 21, a second section 22 and a third section 23 from the inlet surface to the outlet surface. The first section 21 is cylindrical, the second section 22 is conical, and the third section 23 is cylindrical. The diameter of the third section 23 is smaller than the diameter of the first section 21.

[0029] In this embodiment, by setting a three-section spinneret 2, the spinneret 2 is configured as a first section 21, a second section 22, and a third section 23, with the diameter of the spinneret 2 decreasing sequentially. In other words, by setting the spinneret as a structure of guide hole (first section 21) and micropore (third section 23), and setting the second section 22 as a transition section from guide hole to micropore, the viscous polymer melt or solution experiences increased pressure as the diameter of the hole decreases during the process from the guide hole to the micropore, thus improving the spinning performance of the spinneret cap.

[0030] In one embodiment, reference Figure 1-5 The base plate is divided into a first region, a second region 4, a third region 5, and a fourth region 6. The number of spinnerets 2 in each region is the same and they are evenly distributed. There are no holes in the gaps between each region.

[0031] Each region is regularly distributed on the base plate 1. The fifth, sixth, seventh, etc. regions can be set according to the needs. Each region is regularly distributed on the base plate 1. At the same time, the interval area (without holes) between each region passes through the center of the base plate 1, so that the non-perforated area provides additional structural support for the spinneret, and the base plate 1 is not easy to deform.

[0032] Specifically, the spinneret includes a base plate 1, which includes an inlet surface and an outlet surface. Multiple spinneret holes 2 are provided on the base plate. Each spinneret hole 2, from the inlet surface to the outlet surface, comprises a first section 21, a second section 22, and a third section 23. The first section 21 is cylindrical, the second section 22 is conical, and the third section 23 is cylindrical. The diameter of the third section 23 is smaller than the diameter of the first section 21. The base plate 1 is divided into a first region 3, a second region 4, a third region 5, and a fourth region 6. The number of spinneret holes 2 is the same and they are evenly distributed in each region. There are no holes in the inter-regional areas.

[0033] In this embodiment, by dividing the base plate 1 into regions, the pressure on the spinneret can be evenly distributed across these four regions. At the same time, since the intervals between the regions are set to be non-porous, these intervals provide structural support for the base plate 1, making the spinneret less prone to deformation and resulting in a more stable filament output.

[0034] In one embodiment, such as Figure 1-5 As shown, a central region is provided on the base plate. The central region is free of holes and is connected to the interval area. The first region 3, the second region 4, the third region 5 and the fourth region 6 are evenly distributed around the central region.

[0035] Specifically, the spinneret includes a base plate 1, which includes an inlet surface and an outlet surface. Multiple spinneret holes 2 are provided on the base plate. Each spinneret hole 2, from the inlet surface to the outlet surface, comprises a first segment 21, a second segment 22, and a third segment 23. The first segment 21 is cylindrical, the second segment 22 is conical, and the third segment 23 is cylindrical. The diameter of the third segment 23 is smaller than the diameter of the first segment 21. The base plate 1 is divided into a first region 3, a second region 4, a third region 5, and a fourth region 6. The number of spinneret holes 2 is the same and they are evenly distributed in each region. There are no holes in the inter-regional areas. A central region is provided on the base plate. The central region is without holes and is connected to the inter-regional areas. The first region 3, the second region 4, the third region 5, and the fourth region 6 are evenly distributed around the central region.

[0036] In this embodiment, the central area is set to enhance the support force at the center of the base plate 1, making the spinneret more stable and less prone to deformation.

[0037] In one embodiment, such as Figure 1-5 As shown, each of the interval regions has two spinneret holes 2 at one end near the central region.

[0038] Specifically, the spinneret includes a base plate 1, which includes an inlet surface and an outlet surface. Multiple spinneret holes 2 are provided on the base plate. Each spinneret hole 2, from the inlet surface to the outlet surface, comprises a first segment 21, a second segment 22, and a third segment 23. The first segment 21 is cylindrical, the second segment 22 is conical, and the third segment 23 is cylindrical. The diameter of the third segment 23 is smaller than the diameter of the first segment 21. The base plate 1 is divided into a first region 3, a second region 4, a third region 5, and a fourth region 6. The number of spinneret holes 2 is the same and evenly distributed in each region. There are no holes in the intervals between the regions. A central region is provided on the base plate, and this central region is also hole-free. The central region is connected to the intervals. The first region 3, the second region 4, the third region 5, and the fourth region 6 are evenly distributed around the central region. Each interval has two spinneret holes 2 near the end of the central region.

[0039] In this embodiment, two spinneret holes 2 are provided at one end of the interval area near the central area to share some of the pressure with the non-porous area on the base plate 1, making the spinneret more stable and less prone to deformation.

[0040] In one embodiment, reference Figure 1-5 The diameter of the end of the second segment 22 near the infeed surface is equal to the diameter of the first segment 21, and the diameter of the end of the second segment 22 near the outfeed surface is equal to the diameter of the third segment 23.

[0041] In this embodiment, by setting the diameters of the second segment 22 to match those of the first segment 21 and the third segment 23, gaps are avoided that would cause viscous polymer melt or solution to remain in the spinneret orifice 2.

[0042] In one embodiment, reference Figure 1-5 The central axes of the first segment 21, the second segment 22, and the third segment 23 are on the same straight line.

[0043] In this spinneret 2, the central axis of each segment (first segment 21, second segment 22 and third segment 23) is perpendicular to the infeed surface / outfeed surface, and the infeed surface and the outfeed surface are parallel to each other.

[0044] In this embodiment, the spinneret 2 can be regarded as integrally formed. By setting the central axes of the first segment 21, the second segment 22 and the third segment 23 on the same straight line, the spinneret 2 is a smooth through hole, making the formation of the filament smoother.

[0045] In one embodiment, reference Figure 1-5 The diameter of the first segment 21 is 0.5-3mm, and the diameter of the third segment 23 is 0.01-0.15mm.

[0046] In this embodiment, the spinneret includes a base plate 1, which includes an inlet surface and an outlet surface. The base plate is provided with a plurality of spinneret holes 2. Each spinneret hole 2, from the inlet surface to the outlet surface, includes a first section 21, a second section 22, and a third section 23. The first section 21 is cylindrical, the second section 22 is conical, and the third section 23 is cylindrical. The diameter of the end of the second section 22 near the inlet surface is equal to the diameter of the first section 21, and the diameter of the end of the second section 22 near the outlet surface is equal to the diameter of the third section 23. The diameter of the first section 21 is 0.5-3 mm, and the diameter of the third section 23 is 0.01-0.15 mm. The diameter of the first segment 21 is set to 0.5-3mm, and the diameter of the third segment 23 is set to 0.01-0.15mm. The diameter of the first segment 21 is larger than that of the third segment 23. The second segment 22 is a buffer segment between the first segment 21 and the third segment 23, so that the diameter of the spinneret 2 decreases sequentially, and the spinning properties of the spinneret cap are better.

[0047] In one embodiment, reference Figure 1-5 The height of the first segment 21 is 3-20mm, the height of the second segment 22 is 0.25-1.5mm, and the height of the third segment 23 is 0.03-0.5mm. The sum of the heights of the first segment 21, the second segment 22, and the third segment 23 is equal to the thickness of the base plate.

[0048] The height of the spinneret 2 is the same as the thickness of the base plate 1. The bottom (base plate) of a traditional spinneret is no more than 1.5mm. It includes guide holes and micro-holes. The height of the guide holes is no more than 1mm. The spinneret cap of this application is thicker than that of a traditional spinneret cap and has a stronger pressure-bearing capacity. In this embodiment, the aspect ratio of the third segment 23 is 3.0-3.5.

[0049] Specifically, the spinneret includes a base plate 1, which includes an inlet surface and an outlet surface. Multiple spinneret holes 2 are provided on the base plate. Each spinneret hole 2, from the inlet surface to the outlet surface, comprises a first section 21, a second section 22, and a third section 23. The first section 21 is cylindrical, the second section 22 is conical, and the third section 23 is cylindrical. The diameter of the end of the second section 22 near the inlet surface is equal to the diameter of the first section 21, and the diameter of the end of the second section 22 near the outlet surface is equal to the diameter of the third section 23. The height of the first section 21 is 3-20 mm, the height of the second section 22 is 0.25-1.5 mm, and the height of the third section 23 is 0.03-0.5 mm.

[0050] In this embodiment, the height of the first segment 21 is greater than the height of the third segment 23, making the polymer melt or solution in a viscous state more fluid; at the same time, the thickness of the bottom plate 1 is greater than that of the bottom of a traditional spinneret, and together with the three-segment spinneret hole 2, the spinneret cap in this application has stronger pressure resistance, greater rigidity, and better spinnability.

[0051] In one embodiment, reference Figure 1-5 In each of the regions, the spinnerets 2 are distributed in a fan shape.

[0052] Among them, reference Figure 1-5 The fan-shaped area has four notches (three notches at the arc and one notch at the right angle), and the circle formed by the notches at the right angle of the four areas coincides with the center circle of the base plate 1.

[0053] Specifically, each region is configured as a fan shape, which can match the shape of the circular base plate 1, so that the pressure on the spinneret is evenly distributed on the base plate 1. At the same time, the area without holes between each region is equivalent to the reinforcing rib of the spinneret, making the spinneret in this application able to withstand greater pressure.

[0054] In one embodiment, reference Figure 1-5 The base plate 1 is circular, with a diameter of 20-200mm and a thickness of 3-20mm.

[0055] Specifically, the spinneret includes a base plate 1, which has an inlet surface and an outlet surface. Multiple spinneret holes 2 are provided on the base plate. Each spinneret hole 2, from the inlet surface to the outlet surface, comprises a first section 21, a second section 22, and a third section 23. The first section 21 is cylindrical, the second section 22 is conical, and the third section 23 is cylindrical. The diameter of the third section 23 is smaller than the diameter of the first section 21. The base plate 1 is circular, with a diameter of 20-200 mm and a thickness of 3-20 mm.

[0056] In one embodiment, reference Figure 1-5 The base plate 1 is provided with baffles around its perimeter.

[0057] Among them, the baffle reference Figure 2 and Figure 5 The height of the spinneret with a baffle is 10-35mm.

[0058] Specifically, the spinneret includes a base plate 1, which includes an inlet surface and an outlet surface. The base plate is provided with a plurality of spinneret holes 2. The spinneret holes 2 are provided with a first section 21, a second section 22 and a third section 23 from the inlet surface to the outlet surface. The first section 21 is cylindrical, the second section 22 is conical and the third section 23 is cylindrical. The diameter of the third section 23 is smaller than the diameter of the first section 21. Baffles are provided around the base plate 1.

[0059] In this embodiment, a baffle is set to form a storage space for raw materials and connect it to an external device.

[0060] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A spinneret cap, characterized in that, The spinneret includes a base plate, which has an inlet surface and an outlet surface. The base plate is provided with a plurality of spinneret holes. The spinneret holes, from the inlet surface to the outlet surface, include a first section, a second section, and a third section in sequence. The first section is cylindrical, the second section is conical, and the third section is cylindrical. The diameter of the third section is smaller than the diameter of the first section.

2. The spinneret cap as described in claim 1, characterized in that, The base plate is divided into a first region, a second region, a third region, and a fourth region. The number of spinnerets in each region is the same and they are evenly distributed. There are no holes in the gaps between each region.

3. The spinneret cap as described in claim 2, characterized in that, The base plate has a central region, which is free of holes and connected to the interval area. The first region, the second region, the third region, and the fourth region are evenly distributed around the central region.

4. The spinneret cap as described in claim 3, characterized in that, Each of the interval regions has two spinnerets at one end near the center region.

5. The spinneret cap as described in claim 1, characterized in that, The diameter of the end of the second segment near the infeed surface is equal to the diameter of the first segment, and the diameter of the end of the second segment near the outfeed surface is equal to the diameter of the third segment.

6. The spinneret cap as described in claim 5, characterized in that, The central axes of the first, second, and third segments are on the same straight line.

7. The spinneret cap as described in claim 5, characterized in that, The diameter of the first segment is 0.5-3mm, and the diameter of the third segment is 0.01-0.15mm.

8. The spinneret cap as described in claim 1, characterized in that, The height of the first segment is 3-20mm, the height of the second segment is 0.25-1.5mm, and the height of the third segment is 0.03-0.5mm. The sum of the heights of the first, second, and third segments is equal to the thickness of the base plate.

9. The spinneret cap as described in claim 1, characterized in that, The base plate is a circular plate with a diameter of 20-200mm and a thickness of 3-20mm.

10. The spinneret cap as described in claim 1, characterized in that, The base plate is surrounded by baffles.

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