A card and its carding elements

Abstract

A carding machine and its carding elements belong to the technical field of carding machines, comprising a movable flat and a card clothing strip, the card clothing strip is connected to the bottom surface of the movable flat through magnetic card clothing; the movable flat comprises a beam body outer frame, a lower base body and a limiting strip, the beam body outer frame is connected with the lower base body, the limiting strip is connected with the beam body outer frame, the material of the limiting strip is carbon fiber material for eliminating the curvature deformation caused by the thermal expansion of the lower base body; by designing the carding elements as a modular assembly, various material manufacturing processes can be adapted, and installation and disassembly and maintenance are facilitated, the expansion deformation of the lower base body is limited through the cooperation of the beam body outer frame and the limiting strip, so that the pre-stress does not need to be applied before installation, and the deformation caused by heat can be offset in the working process.

Description

Technical Field

[0001] This utility model belongs to the technical field of carding machines, specifically referring to a carding machine and its carding elements. Background Technology

[0002] The main function of the moving flats on a carding machine is to comb, remove impurities, and mix the opened loose fibers during the carding process, eliminating most of the neps, impurities, and short fibers. The spacing between the moving flats and the carding machine cylinders is crucial to the quality of the carding. Different raw materials and sliver specifications require different spacing between the moving flats and the cylinders; only a suitable spacing ensures that the fibers are combed necessary but not excessively.

[0003] Nowadays, most carding machine cover plates are made of aluminum alloy. Although it is easy to process high-precision dimensions, aluminum alloy movable cover plates are prone to deformation due to temperature during use. The amount of deformation directly affects the quality of carding. Therefore, aluminum alloy movable cover plates generally have the problem of difficulty in adjusting the spacing.

[0004] Chinese patent document CN216107369U discloses a utility model patent for an adjustable aluminum alloy movable cover plate suitable for carding machines, which solves the above-mentioned problems. The technical solution disclosed in this patent addresses the issue of deformation of the aluminum alloy movable cover plate during use, leading to changes in the spacing and affecting the carding quality and impurity removal effect of the carding machine. It introduces an adjustable spacing mechanism that can preset deformation to compensate for deformation during use. Therefore, the curvature deformation in the cover plate caused by prestress due to heat during the carding process is eliminated. This allows for convenient adjustment of the spacing requirements for different raw materials. However, while the screw adjustment method in the aforementioned patent can effectively compensate for deformation during use by preset deformation, the deformation of the cover plate itself varies depending on the climate and temperature changes. A drawback is that prestress must be applied before installing the cover plate on the carding machine, making it difficult to precisely adjust the operating conditions of the cover plate and hindering mass production. Furthermore, during the installation of the adjusting rod of the cover plate, it is difficult to ensure that the torque of the clamping component nut is completely consistent. Different nut torques will result in different preset deformations of the cover plate. The greater the nut torque, the greater the deflection of the profile component. When the cover plate is affected by thermal expansion, the deformation of each piece will also vary greatly. Typically, the movable cover plate device of a carding machine consists of 70-120 movable cover plates. If the flatness of each cover plate differs significantly, the spacing between it and the cylinder carding cloth will also vary greatly. As a result, the uniformity of the cotton web of the carding machine will inevitably be affected.

[0005] Therefore, how to improve the performance of carding machine cover plates while reducing damage to fibers has become an urgent problem to be solved in the industry. Utility Model Content

[0006] In view of the above situation and to overcome the defects of the prior art, this utility model provides a carding element for a carding machine, which at least partially solves the above technical problems.

[0007] The technical solution adopted in this embodiment of the utility model is as follows: a carding element for a carding machine, including a movable cover plate component and a needle strip, wherein the needle strip is connected to the bottom surface of the movable cover plate component by magnetic needle strip; The movable cover plate component includes a beam outer frame, a lower base, and a limiting strip. The beam outer frame is connected to the lower base, and the limiting strip is connected to the beam outer frame. The limiting strip is made of carbon fiber material to eliminate curvature deformation caused by thermal expansion of the lower base.

[0008] Furthermore, the length of the limiting strip is the same as the length of the outer frame of the beam, and the limiting strip is connected to the lower base by multiple fastening screws.

[0009] Furthermore, the number of fastening screws is 2-15, and the fastening screws pass through the upper limiting strip and the outer frame of the beam from top to bottom, and are fixed with glue.

[0010] Furthermore, the height of the outer frame of the beam is 48-75mm, and stress relief holes are provided at the top of the outer frame of the beam.

[0011] Furthermore, the outer frame of the beam is made of one of the following materials: carbon fiber, steel, and aluminum alloy.

[0012] Furthermore, the outer frame of the beam is a closed structure, and the interior of the outer frame of the beam is a hollow cavity; The material of the lower substrate is one of aluminum profile, steel, and carbon fiber.

[0013] Furthermore, it also includes end caps, which are respectively installed at both ends of the outer frame of the beam. The end cap plugs are inserted into the inner cavities at both ends of the outer frame of the beam. The top of the end cap plugs is connected to the outer frame of the beam by screws. The connection between the outer frame of the beam and the lower base is one of the following: screw connection, rivet connection, strong adhesive connection, or structural snap-fit ​​connection.

[0014] Furthermore, the end plug portion has a circular reinforcing rib in the middle and vertical reinforcing ribs at the top and bottom; the end has a steel plate inside, which is completely encased in the interior through injection molding, providing better structural reinforcement.

[0015] Furthermore, the end plug portion has a circular reinforcing rib in the middle, with a heat dissipation hole in the middle of the circular reinforcing rib, and vertical reinforcing ribs at the top and bottom, thereby stabilizing the temperature change of the movable cover plate; the end has a steel plate inside, which is completely encased inside by injection molding.

[0016] On the other hand, this utility model also provides a carding element for a carding machine, including a movable cover plate component and a needle strip, wherein the needle strip is connected to the bottom surface of the movable cover plate component; The movable cover plate component includes an outer frame of a beam and a lower base. The lower base is made of carbon fiber material and has multiple elastic mushroom nails along its length. It is integrally formed by injection molding. The elastic mushroom nails automatically spring open and lock into place with the corresponding holes at the bottom of the outer frame of the beam.

[0017] A carding machine, comprising the aforementioned carding elements.

[0018] The beneficial effects of this utility model by adopting the above structure are as follows: This invention designs the combing element as a modular component, which can adapt to various material manufacturing processes and is easy to install, disassemble and maintain. The expansion and deformation of the lower base is mutually constrained by the cooperation of different heat deformation materials such as the outer frame of the beam and the limiting strip, so that heat-induced deformation can be offset during operation without the need to apply prestress before installation. Attached Figure Description

[0019] Figure 1 This is a simplified three-dimensional structural diagram of an embodiment of the present utility model; Figure 2 This is a schematic diagram of the cooperation between the outer frame of the beam and the needle cloth in an embodiment of this utility model; Figure 3 This is a schematic diagram showing the fit between the end of the beam and the outer frame of an embodiment of this utility model; Figure 4 This is a schematic diagram showing the fit between the lower base and the outer frame of the beam in an embodiment of this utility model; Figure 5 This is a schematic diagram illustrating the fit between the lower base and the outer frame of the beam according to one embodiment of the present invention. Figure 6 This is a front view of the beam outer frame structure according to an embodiment of the present utility model.

[0020] In the diagram: 3-Conveyor belt mounting hole; 4-End; 5-Cylinder needle cloth; 6-Curved rail; 7-Needle cloth strip; 8-Magnetic strip; 11-Outer frame of beam; 12-Lower base; 13-Fastening screw; 14-Stress relief hole; 16-Bending part; 21-Elastic mushroom nail; 41-Steel plate; 42-Plug; 43-Reinforcing rib; 44-Heat dissipation hole; 71-Magnetic needle cloth; 131 - Restriction Clause.

[0021] The accompanying drawings are provided to further illustrate the embodiments of the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] In the description of the embodiments of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of 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.

[0024] like Figure 1 , Figure 3 and Figure 5 As shown, this utility model provides a carding element for a carding machine, including a movable cover plate component and a needle cloth strip 7, wherein the needle cloth strip 7 is connected to the bottom surface of the movable cover plate component by a magnetic needle cloth 71; The movable cover plate component includes a beam outer frame 11, a lower base 12, and a limiting strip 131. The beam outer frame 11 is connected to the lower base 12, and the limiting strip 131 is connected to the beam outer frame 11. The limiting strip is made of carbon fiber material to eliminate the curvature deformation caused by the thermal expansion of the lower base 12.

[0025] It should be noted that the length of the limiting strip is usually set to the length of the outer frame 11 of the beam, and the maximum limitation on the thermal deformation capacity of the movable cover plate is fixed at both ends. The limiting strip 131 itself hardly expands when heated, and its elongation rate after heating is less than that of the lower base 12, thus limiting the elongation of the lower base 12 of the cover plate. Due to the setting of the limiting strip 131 within the outer frame 11 of the beam, the extension of the lower base 12 after thermal deformation, i.e., bulging or concave bending, can be limited. Under the premise that the movable cover plate does not have any preset deformation, the curvature deformation caused by the thermal expansion of the movable cover plate in the working state will be automatically eliminated by the limiting strip, achieving the accuracy of the movable cover plate when it is cold.

[0026] In a further embodiment of this example, the length of the limiting strip 131 is the same as the length of the outer frame 11 of the beam. The limiting strip 131 is connected to the lower base 12 by a plurality of fastening screws 13. Of course, the connection by fastening screws 13 can also be replaced by the connection by rivets.

[0027] In a further embodiment of this example, the number of fastening screws 13 is 2-15, and the fastening screws 13 pass through and connect the upper limiting strip 131 and the bottom surface of the outer frame 11 of the beam from top to bottom.

[0028] In a further embodiment of this example, the height of the outer frame 11 of the beam is 48-75mm, and the top of the outer frame 11 of the beam is provided with stress relief holes 14, which not only facilitates the installation of screws, but also serves as stress relief holes for the outer frame 11 of the beam, and can offset part of the stress deformation of the outer frame 11 of the beam.

[0029] The experimental data in Table 1 below shows that, for the same material, the deflection decreases with increasing height. According to the requirements for the movable cover plate, the flatness should be ≤0.02mm. Therefore, a height of 48-75mm for the outer frame 11 of the beam is more suitable.

[0030] Table 1

[0031] Deflection calculation formula Y=FXL 3 / 48×E×J 2 Y: Deflection (m); L: Length (m); E: Elastic modulus (Pa); F: Applied force (N); J: Moment of inertia of section (m) 4) .

[0032] In a further embodiment of this example, the outer frame 11 of the beam is made of one of carbon fiber, steel, and aluminum alloy. The thermal deformation resistance of resin-mixed carbon fiber (carbon fiber reinforced composite, CFRP), aluminum alloy, and steel when applied to the profile is compared as follows, and the analysis is carried out in combination with material characteristics and data.

[0033] Comparison of heat deformation resistance: The ability to resist heat deformation depends on the material's coefficient of thermal expansion (CTE) and elastic modulus (stiffness): the lower the coefficient of thermal expansion, the smaller the dimensional deformation when the temperature changes; the higher the elastic modulus, the stronger the ability to resist deformation caused by thermal stress.

[0034] The coefficient of thermal expansion of resin-blended carbon fiber materials: The longitudinal coefficient of thermal expansion of unidirectional carbon fiber reinforced composite materials can be as low as -1 to 1 ppm / ℃, and the transverse coefficient of thermal expansion is about 20 to 30 ppm / ℃. If the profile is designed with fiber orientation, the thermal deformation along the fiber direction is minimal, approaching the level of Invar alloy in metals.

[0035] Elastic modulus: The longitudinal elastic modulus can reach 230~430 GPa, far exceeding that of steel and aluminum alloys. When the temperature rises to 60℃, the decrease is only 2~3% (such as T700 carbon fiber / epoxy resin composite material, the elastic modulus at 60℃ is about 225 GPa). It has the strongest resistance to heat deformation, especially in the fiber direction, it is almost unaffected by temperature. However, its cost is relatively high compared to steel and aluminum profiles.

[0036] Taking stainless steel as an example: its coefficient of thermal expansion is about 10~17 ppm / ℃ (depending on the steel grade, such as 17 ppm / ℃ for 304 stainless steel), its elastic modulus is about 193~200 GPa at 20℃, and decreases by about 1~2% at 60℃ (about 190~196 GPa). Its stiffness loss is minimal, and its resistance to thermal deformation is second best. Its coefficient of thermal expansion is 10~20 times that of the aforementioned carbon fiber materials in the longitudinal direction, but its elastic modulus is high and its cost is relatively low.

[0037] The carbon emissions from producing 1 ton of material are as follows: 2 tons of steel, 16.5 tons of aluminum, and 20 tons of carbon fiber. When producing the same weight of movable carding sheet ribs, steel's carbon emissions are 12% of aluminum's. However, to produce movable carding sheet ribs with the same rigidity, carbon fiber uses 25% less material than aluminum, demonstrating a significant advantage in carbon emission reduction. Combining this with the previous analysis of rigidity, although steel's rigidity is slightly lower than carbon fiber, it has the greatest advantage in terms of carbon emissions. Under the premise of meeting the basic rigidity requirements of the carding machine's movable carding sheet ribs, choosing steel can greatly reduce the carbon footprint of the production process, aligning with environmental protection principles. Considering both carbon emissions and rigidity, steel is the more suitable material for manufacturing movable carding machine ribs.

[0038] The outer frame 11 of the beam serves as the main keel structure. Simulation data (see Table 2) shows that the structure, height, material, elastic modulus, and weight per meter of the outer frame 11 and the lower base 12 are all important factors affecting the strength of the movable cover plate rib. Under the same structure, height, and load, the static stress deformation resistance of steel and carbon fiber materials is three times that of aluminum. From a rigidity perspective, carbon fiber is preferred, combined with optimized structural design and manufacturing processes in the design of the carding machine's movable cover plate rib. From a cost perspective, steel is preferred; its rigidity can be improved through reasonable steel structure design and appropriate manufacturing processes.

[0039] Table 2

[0040] In a further embodiment of this invention, the outer frame 11 of the beam body is a closed-bottom structure. The bottom of the outer frame 11 has two bent portions 16, and the top of the lower base 12 has two grooves. The bent portions 16 are embedded in the corresponding grooves. This design not only improves the stability of the overall structure but also facilitates disassembly and installation, further reducing maintenance time and costs. Simultaneously, the presence of the bent portions 16 effectively disperses pressure, extends the service life of components, and ensures the stability and reliability of the carding machine during long-term operation.

[0041] In a further embodiment of this example, the material of the lower substrate 12 is one of aluminum profile, steel, and carbon fiber.

[0042] In a further embodiment of this invention, an end head 4 is also included. The end head 4 is respectively installed at both ends of the outer frame 11 of the beam. The plug 42 is inserted into the inner cavity at both ends of the outer frame 11 of the beam. The top of the plug 42 is connected to the outer frame 11 of the beam by screws.

[0043] The connection between the outer frame 11 of the beam and the lower base 12 is one of the following: screw connection, rivet connection, strong adhesive connection or structural snap-fit ​​connection; the above connection methods can effectively enhance the stability of the overall structure.

[0044] The plug 42 has a circular reinforcing rib 43 in the middle, with a heat dissipation hole 44 in the middle of the circular reinforcing rib, and vertical reinforcing ribs 43 at the top and bottom; the end has a steel plate 41 inside, which is completely encased in the interior by injection molding process, which has a better strengthening effect on the structure.

[0045] In a further embodiment of this example, the material of the outer contour of the end is carbon fiber composite material. The steel plate 41 is completely encased inside by injection molding, so that the end, the plug 42, the steel plate 41, and the conveyor belt mounting hole 3 are integrated into one unit. The end has higher strength, is not easily deformed or damaged, and can be installed and replaced conveniently and quickly.

[0046] It should be noted that the modules in the movable cover plate component of this embodiment can be replaced and repaired individually, reducing maintenance costs. Advantageously, even if the needle-covered fabric substrate is damaged, the substrate can be quickly repaired or replaced individually without requiring a complete replacement, thus reducing maintenance costs and downtime. Simultaneously, the modular design allows for interchangeable combinations of movable cover plate frame beams and substrates made of different materials. The flexible matching of beams and substrates of different materials optimizes performance and cost, achieving efficient production and maintenance.

[0047] On the other hand, such as Figures 1-4 and Figure 6As shown, this utility model embodiment also provides a carding element for a carding machine, including a movable cover plate component and a needle strip 7, wherein the needle strip 7 is connected to the bottom surface of the movable cover plate component; The movable cover plate component includes an outer frame 11 of the beam body and a lower base 12. The lower base 12 is made of carbon fiber material and has multiple elastic mushroom nails 21 along its length. It is integrally formed by injection molding. The elastic mushroom nails 21 automatically spring open and lock into place with the corresponding holes at the bottom of the outer frame 11 of the beam body.

[0048] On the other hand, this utility model embodiment also provides a carding machine having the above-mentioned carding elements.

[0049] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0050] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

[0051] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A carding element for a carding machine, characterized in that: It includes a movable cover plate component and a needle strip, wherein the needle strip is connected to the bottom surface of the movable cover plate component by magnetic needle strip; The movable cover plate component includes a beam outer frame, a lower base, and a limiting strip. The beam outer frame is connected to the lower base, and the limiting strip is connected to the beam outer frame. The limiting strip is made of carbon fiber material to eliminate curvature deformation caused by thermal expansion of the lower base.

2. The carding element for a carding machine according to claim 1, characterized in that: The length of the limiting strip is the same as the length of the outer frame of the beam, and the limiting strip is connected to the lower base by multiple fastening screws.

3. The carding element for a carding machine according to claim 2, characterized in that: The number of fastening screws is 2-15, and the fastening screws pass through the upper limiting strip and the outer frame of the beam from top to bottom.

4. The carding element for a carding machine according to claim 1, characterized in that: The height of the outer frame of the beam is 48-75mm, and stress relief holes are provided at the top of the outer frame of the beam.

5. The carding element for a carding machine according to claim 1, characterized in that: The outer frame of the beam is made of one of the following materials: carbon fiber, steel, and aluminum alloy.

6. The carding element for a carding machine according to claim 1, characterized in that: The outer frame of the beam is a closed structure, and the interior of the outer frame of the beam is a hollow cavity; The material of the lower substrate is one of aluminum profile, steel, and carbon fiber.

7. The carding element for a carding machine according to claim 1, characterized in that: It also includes end caps, which are respectively installed at both ends of the outer frame of the beam. The plugs of the end caps are inserted into the inner cavities at both ends of the outer frame of the beam. The top of the plugs of the end caps are connected to the outer frame of the beam by screws. The connection between the outer frame of the beam and the lower base is one of the following: screw connection, rivet connection, strong adhesive connection or structural snap-fit ​​connection.

8. The carding element for a carding machine according to claim 7, characterized in that, The plug portion of the end has a circular reinforcing rib in the middle, with a heat dissipation hole in the middle of the circular reinforcing rib, and vertical reinforcing ribs at the top and bottom; the end has a steel plate inside, which is completely encased inside by injection molding.

9. A carding element for a carding machine, characterized in that: It includes a movable cover plate component and a needle strip, wherein the needle strip is connected to the bottom surface of the movable cover plate component; The movable cover plate component includes an outer frame of a beam and a lower base. The lower base is made of carbon fiber material and has multiple elastic mushroom nails along its length. It is integrally formed by injection molding. The elastic mushroom nails automatically spring open and lock into place with the corresponding holes at the bottom of the outer frame of the beam.

10. A carding machine, characterized in that, A carding machine including the carding element according to any one of claims 1-9.

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