Composite ceramic spinneret plate

Abstract

The utility model discloses a composite ceramic spinneret plate, which belongs to the technical field of spinning equipment and comprises a metal support, a plurality of ceramic nozzles, a plurality of ceramic nozzles and a plurality of ceramic nozzles. The at least one ceramic main body is embedded in the corresponding mounting groove of the metal bracket, and a plurality of spinneret pore channels are formed in the ceramic main body; and the soft alloy sealing ring is embedded between the metal bracket and the ceramic main body. The mode that the ceramic body and the metal support are combined is adopted, interference fit inlaying is achieved between the ceramic body and the metal support through the soft alloy sealing ring, the soft alloy sealing ring serves as a transition installation element, deformation and compression are easy to achieve, the problem of slurry leakage of the spinneret plate in the high-temperature working environment is solved, and the service life of the spinneret plate is prolonged. And in combination with interference fit, the precision requirement of the ceramic main body and the metal bracket in the machining process is reduced, so that the stability and the reliability of the whole structure are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of spinning equipment, and in particular relates to a composite ceramic spinneret. Background Art

[0002] The spinneret is the core component of the textile machine, and the material is required to have characteristics such as hardness, wear resistance, smoothness and precision. It is mainly made of alloy materials, such as gold-platinum alloy, stainless steel, etc., and is surface treated with pure tantalum coating or gold, platinum, alloy coating to improve performance. During the manufacturing process, precise processing of the spinneret hole is crucial to the performance of the spun fiber. In the prior art, the hole is formed by mechanical processing or laser drilling to ensure accuracy and stability. In addition to material selection and hole processing, the surface treatment of the spinneret also affects the spinning effect. The use of polishing, sandblasting and other technologies can improve surface roughness, wettability and wear resistance, and improve fiber quality and output.

[0003] The temperature of the spinneret in normal operation ranges from 200 to 350°C. The spinneret needs to be cleaned regularly due to equipment maintenance, material replacement and equipment overhaul. The cleaning process usually involves repeatedly calcining the spinneret assembly at a high temperature of 500 to 600°C to remove residual spinning materials and using an ultrasonic cleaner for thorough cleaning.

[0004] The diameter of the spinneret hole on the spinneret is usually about 0.1~0.3mm, and the hole length is 0.6~5mm. During use, due to repeated cleaning and spinning, fine structures such as the spinneret hole are prone to residue and carbon deposition, resulting in blockage of the hole. It is difficult to completely remove all residual spinning raw materials when cleaning the spinneret made of traditional metal materials. After cleaning, it is necessary to use a microscope to check the residue in the hole. If there is any residue, it needs to be removed manually. This process can easily damage the spinneret hole, reduce its finish, and seriously affect the quality of the spinning product. In addition, high-temperature calcination may also cause deformation of the spinneret alloy. As the number of uses increases, the wear of the inner wall of the spinneret hole will also increase, and excessive wear will affect the accuracy of the hole. These factors together lead to the service life of the alloy spinneret usually being only 3-5 years.

[0005] In order to improve the above problems, spinnerets made of ceramic materials and metal composites have appeared in the prior art. Such spinnerets are assembled together by high-temperature resistant glue or interference fit. However, since the thermal expansion coefficient of ceramic materials is much smaller than that of metal materials, the gap between ceramics and metals is easy to expand in a long-term high-temperature working environment and during cleaning, resulting in melt leakage in the composite spinneret, which makes it impossible to spin normally. Therefore, although the ceramic-metal composite spinneret has improved some performance problems of traditional alloy spinnerets to a certain extent, there are still new challenges and limitations. Utility Model Content

[0006] In response to one or more of the above defects or improvement needs of the prior art, the utility model provides a composite ceramic spinneret, which combines a ceramic body with a metal bracket and achieves interference fit inlay through a soft alloy sealing ring, thereby ensuring the stability and durability of the structure.

[0007] In order to achieve the above object, the utility model provides a composite ceramic spinneret, comprising:

[0008] A metal bracket having a mounting slot therein;

[0009] At least one ceramic body, embedded in the mounting groove corresponding to the metal bracket, and the ceramic body is provided with a plurality of spinneret holes;

[0010] A soft alloy sealing ring is embedded between the metal bracket and the ceramic body.

[0011] As a further improvement of the utility model, the soft alloy sealing ring and the metal bracket are interference fit, and the soft alloy sealing ring and the ceramic body are interference fit.

[0012] As a further improvement of the present invention, the thermal expansion coefficient of the soft alloy sealing ring is greater than the thermal expansion coefficients of the ceramic body and the metal bracket.

[0013] As a further improvement of the utility model,

[0014] The material of the ceramic body is ZrO2, Al2O3, Si3N4 or SiO2 ceramic powder; and / or,

[0015] The soft alloy sealing ring is made of soft alloy material; and / or,

[0016] The metal bracket is made of stainless steel or mold steel.

[0017] As a further improvement of the present invention, the cross-sectional shapes of the spinnerets are the same or different, and the cross-sectional shapes include circular, triangular, quadrilateral, pentagonal, hexagonal, cross-shaped, C-shaped or irregular shapes.

[0018] As a further improvement of the present invention, the cross section of the spinneret hole is circular;

[0019] The diameter of the spinneret hole ranges from 0.01 mm to 5.00 mm; and / or,

[0020] 1≤The aspect ratio of the spinneret hole is ≤15.

[0021] As a further improvement of the utility model, the number of the spinneret holes is 1-5000.

[0022] As a further improvement of the utility model, the spinneret channel includes a guide hole and a spinneret hole, and the spinneret hole is arranged corresponding to the outlet end of the guide hole.

[0023] As a further improvement of the utility model, a plurality of ceramic bodies are arranged on the composite ceramic spinneret, a mounting groove corresponding to each ceramic body is arranged on the metal bracket, and a soft alloy sealing ring is arranged between each ceramic body and the metal bracket.

[0024] As a further improvement of the utility model, the inner ring of the mounting groove of the metal bracket is provided with a boss structure, and the soft alloy sealing ring and the metal bracket are clamped on the boss structure.

[0025] In general, the above technical solution conceived by the utility model has the following beneficial effects compared with the prior art:

[0026] (1) The composite ceramic spinneret of the utility model adopts a method of combining a ceramic body with a metal bracket, and an interference fit is achieved between the ceramic body and the metal bracket through a soft alloy sealing ring; the metal bracket can protect the ceramic body and effectively avoid damage caused by collision. Compared with the full ceramic spinneret, this structure significantly extends the service life of the spinneret. At the same time, the soft alloy sealing ring, as a transition installation element, is not only easy to deform and compress, avoiding the problem of slurry leakage in the spinneret in a high-temperature working environment, but also combined with the interference fit, reduces the precision requirements of the ceramic body and the metal bracket during the processing, thereby improving the stability and reliability of the overall structure.

[0027] (2) The composite ceramic spinneret of the utility model adopts a soft metal with a high thermal expansion coefficient as a key component. This soft metal exhibits superior performance within the working temperature range of 200-350°C of the spinneret and in the environment of 500-600°C for cleaning and calcining. In a high temperature environment, this soft metal material is more likely to expand, thereby achieving a self-sealing effect to ensure that the spinneret will not leak slurry in a high temperature working environment; more importantly, as the working temperature increases, its sealing performance will be further improved. Under high temperature conditions, the filled soft metal can more tightly lock the gap between the ceramic and the metal, thereby ensuring the sealing performance of the composite spinneret and greatly improving its service life.

[0028] (3) The composite ceramic spinneret of the utility model uses a soft alloy sealing ring as a transitional installation element, which can achieve room temperature interference fit installation. The assembly process can be completed by simply sleeve the soft metal on the outer periphery of the ceramic body at room temperature and then embed it in the installation groove of the metal body, thereby achieving room temperature assembly of the metal bracket. Compared with the prior art, the utility model abandons the complex assembly method of high temperature interference fit, effectively reduces the requirements for assembly accuracy, and thus significantly reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the structure of a composite ceramic spinneret according to an embodiment of the utility model;

[0030] Figure 2 This is a schematic diagram of the cross-sectional structure of a composite ceramic spinneret according to an embodiment of the utility model;

[0031] Figure 3 It is a schematic diagram of the structure of a composite ceramic spinneret including multiple ceramic main structures in an embodiment of the utility model;

[0032] Figure 4 It is a schematic diagram of the cross-sectional structure of a composite ceramic spinneret including multiple ceramic main structures in an embodiment of the utility model.

[0033] In all the drawings, the same reference numerals represent the same technical features, specifically: 1. Ceramic body; 2. Soft alloy sealing ring; 3. Metal bracket; 4. Spinneret hole. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0039] Combination Figure 1 and Figure 2 As shown, the composite ceramic spinneret of the embodiment of the utility model comprises a ceramic body 1, a soft alloy sealing ring 2 and a metal bracket 3. The metal bracket 3 is provided with a mounting groove, the ceramic body 1 is embedded in the mounting groove corresponding to the metal bracket 3, and a plurality of spinneret holes 4 are provided on the ceramic body 1; the soft alloy sealing ring 2 is embedded between the ceramic body 1 and the metal bracket 3.

[0040] In the preferred embodiment, the soft alloy sealing ring 2 and the metal bracket 3 are interference fit, and the soft alloy sealing ring 2 and the ceramic body 1 are interference fit. The composite ceramic spinneret of the utility model is inlaid with the metal bracket 1 and the ceramic body 3, and the soft alloy sealing ring 2 is filled between the ceramic body 1 and the metal bracket 3 by interference fit, so that the ceramic body 1 and the metal bracket 3 are inlaid into one by the soft metal.

[0041] More preferably, the inner ring of the installation groove of the metal bracket 3 is provided with a boss structure, and the soft alloy sealing ring 2 and the metal bracket 3 are clamped on the boss structure, which plays a limiting role when the soft alloy sealing ring 2 and the metal bracket 3 are installed.

[0042] The composite ceramic spinneret of the embodiment of the utility model adopts the method of combining a ceramic body 1 with a metal bracket 3, and an interference fit is achieved between the ceramic body 1 and the metal bracket 3 through a soft alloy sealing ring 2. The ceramic spinneret is easy to maintain and clean, but it is very easy to be damaged, broken, and broken during use. In the composite ceramic spinneret, the metal bracket 3 can protect the ceramic body 1, effectively avoiding damage caused by collision and increasing the service life of the ceramic; at the same time, the soft alloy sealing ring 2, as a transition installation element, is not only easy to deform and compress, avoiding the problem of slurry leakage in the spinneret in a high-temperature working environment, but also combined with the interference fit, reduces the precision requirements of the ceramic body and the metal bracket during the processing process, thereby improving the stability and reliability of the overall structure and reducing production costs.

[0043] In a preferred embodiment, the thermal expansion coefficient of the soft alloy sealing ring 2 is greater than the thermal expansion coefficients of the ceramic body 1 and the metal bracket 3 .

[0044] Further preferably, the soft alloy sealing ring 2 is made of soft alloy material, including but not limited to aluminum alloy, magnesium alloy, zinc alloy and the like.

[0045] The material of the ceramic body 1 is high-strength single-phase or multi-phase ceramics such as ZrO2, Al2O3, Si3N4, and SiO2.

[0046] The metal bracket 3 is made of stainless steel or mold steel. In a non-limiting manner, the grades of the stainless steel material may be SUS630, SUS304, SUS316, etc., and the grades of the mold steel material may be S136, etc.

[0047] During the operation of the composite ceramic spinneret, the working environment temperature range is 200-350°C, while the temperature required for cleaning is as high as 500-600°C. Since the thermal expansion coefficient of ceramics is usually smaller than that of metals, after a long period of use, the gap between the ceramic body and the metal bracket will gradually expand, thereby causing the melt to leak. Therefore, the utility model adopts a soft metal material with a thermal expansion coefficient greater than that of the ceramic body and the metal bracket as a sealing filler. In a high temperature environment, this soft metal material is more likely to expand, thereby achieving a self-sealing effect to ensure that the spinneret will not leak in a high temperature working environment. More importantly, as the working temperature increases, its sealing performance will be further improved. Under high temperature conditions, the filled soft metal can more tightly lock the gap between the ceramic and the metal, thereby ensuring the sealing performance of the composite spinneret.

[0048] In a preferred embodiment, according to the actual application, a single or multiple spinnerets 4 are provided on the ceramic body 1, and the number of the spinnerets 4 is further preferably 1-5000. And according to the actual application, the cross-sectional shape of the spinneret 4 can be circular, triangular, quadrilateral, pentagonal, hexagonal, cross-shaped, C-shaped, etc., or other irregular shapes.

[0049] More preferably, when the cross-sectional shape of the spinneret hole is circular, the diameter of the spinneret hole 4 ranges from 0.01 mm to 5.00 mm, and / or the aspect ratio of the spinneret hole 4 is 1≤≤15.

[0050] More preferably, the spinneret channel 4 includes a flow guide hole and a spinneret hole, and the spinneret hole is arranged correspondingly to the outlet end of the flow guide hole. In a specific embodiment of the utility model, the flow guide hole is conical in shape, and the spinneret hole is cylindrical in shape.

[0051] It should be noted that, in addition to the spinneret holes, the ceramic body 1 may also be provided with structures including but not limited to guide holes, mounting holes, and equal-position holes; the metal bracket 3 may be provided with mounting holes, positioning holes, and other structures, which can be designed according to actual needs.

[0052] In the composite ceramic spinneret of the present invention, one composite ceramic spinneret is provided with one or more ceramic bodies 1, that is, the ceramic bodies 1 embedded in the metal bracket 3 can be single or multiple. Figure 3 and Figure 4 The present invention provides a composite ceramic spinneret in a specific embodiment, including two ceramic bodies 1, a metal bracket 3 is provided with a mounting groove corresponding to each ceramic body 1, the two ceramic bodies 1 are preferably symmetrically arranged in the metal bracket 3, and a soft alloy sealing ring 2 is provided between each ceramic body 1 and the metal bracket 3, and the transition is made through the soft metal and the inlay is integrated. The same is true when more than two ceramic bodies 1 are provided, which will not be described here.

[0053] In the assembly process of the composite ceramic spinneret of the embodiment of the utility model, the soft alloy material 3 and the ceramic body 1 are first assembled together, and then the soft alloy material 3 and the ceramic body 1 are inlaid together. The specific assembly process is as follows:

[0054] First, the soft alloy sealing ring 2 is inserted into the outer ring of the ceramic body 1 by interference fit and fixed as a whole, and then the whole is embedded into the corresponding installation groove of the metal bracket 3, and finally the surface is trimmed to complete the installation.

[0055] In the prior art, the assembly of the composite ceramic spinneret requires the metal bracket to be heated to a high temperature state of 300-500°C, and then to be interference fit with the ceramic body at room temperature. This method requires extremely high precision in the assembly gap between the metal bracket and the ceramic body, which undoubtedly increases the difficulty and cost of the production process. The composite ceramic spinneret of the utility model uses soft metal as a transitional mounting element, and its installation process adopts an interference fit method at room temperature. Specifically, the assembly process can be completed by simply sleeveing ​​the soft metal on the periphery of the ceramic body at room temperature, and then embedding it in the mounting groove of the metal body, thereby realizing room temperature assembly of the metal bracket.

[0056] Therefore, the utility model can achieve interference fit installation at room temperature. Compared with the prior art, the utility model abandons the complex assembly method of high-temperature interference fit, effectively reduces the requirements for assembly accuracy, and thus significantly reduces production costs.

[0057] It is easy for those skilled in the art to understand that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A composite ceramic spinneret, characterized in that: include: A metal bracket having a mounting slot therein; At least one ceramic body, embedded in the mounting groove corresponding to the metal bracket, and the ceramic body is provided with a plurality of spinneret holes; A soft alloy sealing ring is embedded between the metal bracket and the ceramic body.

2. The composite ceramic spinneret according to claim 1, characterized in that: The soft alloy sealing ring and the metal bracket are interference fit, and the soft alloy sealing ring and the ceramic body are interference fit.

3. The composite ceramic spinneret according to claim 1, characterized in that: The thermal expansion coefficient of the soft alloy sealing ring is greater than the thermal expansion coefficients of the ceramic body and the metal bracket.

4. The composite ceramic spinneret according to any one of claims 1 to 3, characterized in that: The material of the ceramic body is ZrO2, Al2O3, Si3N4 or SiO2 ceramic powder; and / or, The soft alloy sealing ring is made of soft alloy material; and / or, The metal bracket is made of stainless steel or mold steel.

5. The composite ceramic spinneret according to any one of claims 1 to 3, characterized in that: The cross-sectional shapes of the spinneret holes are the same or different, and the cross-sectional shapes include circular, triangular, quadrilateral, pentagonal, hexagonal, criss-cross, C-shaped or irregular shapes.

6. The composite ceramic spinneret according to claim 5, characterized in that: The cross section of the spinneret hole is circular; The diameter of the spinneret hole ranges from 0.01 mm to 5.00 mm; and / or, 1≤The aspect ratio of the spinneret hole is ≤15.

7. The composite ceramic spinneret according to any one of claims 1 to 3 or 6, characterized in that: The number of the spinneret holes is 1-5000.

8. The composite ceramic spinneret according to any one of claims 1 to 3 or 6, characterized in that: The spinneret channel comprises a flow guide hole and a spinneret hole, and the spinneret hole is arranged corresponding to the outlet end of the flow guide hole.

9. The composite ceramic spinneret according to any one of claims 1 to 3 or 6, characterized in that: A plurality of ceramic bodies are arranged on the composite ceramic spinneret, a mounting groove corresponding to each ceramic body is arranged on the metal bracket, and a soft alloy sealing ring is arranged between each ceramic body and the metal bracket.

10. The composite ceramic spinneret according to any one of claims 1 to 3 or 6, characterized in that: The inner ring of the mounting groove of the metal bracket is provided with a boss structure, and the soft alloy sealing ring and the metal bracket are clamped on the boss structure.

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