Combined flat for a flat card

Abstract

The utility model belongs to the field of textile machinery, disclose a kind of combined apron for apron type carding machine, it is made of metal apron strip (2) and elastic apron strip (1) compound, both are detachably mounted on same apron framework (3) by installation groove (8), can be realized individually replacement without interfering each other;Elastic apron strip (1) is close to fiber inlet, and metal apron strip (2) is set in the back side of elastic apron strip (1);Metal apron strip (2) is made of metal card clothing rack (4) and metal card clothing rack support (5);Elastic apron strip (1) is made of steel needle (7) implanted on base cloth (6) and base cloth (6).The utility model can be individually replaced metal apron strip, elastic apron strip without interfering each other when the change of fiber type or carding process, effectively open loose and separate impurities at apron inlet, maintain long-term stability of process gauge at the most tight place of outlet gauge, facilitate to obtain higher yield, carding quality.

Description

Technical Field

[0001] This utility model belongs to the field of textile machinery, specifically a combined cover plate for a cover plate type carding machine. Background Technology

[0002] The carding plate is a key component of a carding machine used to comb fibers. Modern carding machines typically have a front and rear fixed carding plate structure and an elastic carding cloth located between the fixed carding plates, which constitute the entire carding system.

[0003] A typical elastic flatbed card cloth structure is shown in DE102007037055A1. In current applications, with the increase in carding machine speed and output, the controllability of the gap between this typical elastic flatbed and the cylinder card cloth at its closest point becomes worse, especially on wide-width carding machines. This is because the binding effect of the elastic base fabric on the steel needles weakens with increasing carding force. This leads to unstable gaps during high-speed, high-output, wide-width carding, causing fluctuations in carding quality, and even serious deterioration. Since the steel needles deform along with the base fabric during carding, if the deformation is too large and the process gap is too small, the steel needles collide with the cylinder needles, causing damage to the card cloth and significantly reducing its service life. To prevent this, elastic flatbed card cloths are usually set with a larger process gap; however, this leads to a reduction in carding efficiency. During processing, the steel needle carrier itself is elastic, resulting in a significantly lower flatness compared to a completely rigid metal serrated cover plate. This limits the use of extremely small process spacing.

[0004] While a fully rigid metal serrated structure can ensure stable carding spacing, it exacerbates fiber damage. Although a segmented structure like CN204898162U with a certain tilt angle can mitigate fiber damage, it is still difficult to control fiber damage below a reasonable level when dealing with cotton or recycled cotton fibers. Therefore, this type of structure can only be used in the carding of synthetic fibers with high breaking strength. Furthermore, a fully metal serrated structure struggles to capture impurities in the fibers, fails to form sufficient cover hairs, and has poor impurity removal capabilities, making it unsuitable for carding cotton fibers containing medium to high levels of impurities.

[0005] The fixed carding structure used in CN207793502U helps mitigate fiber damage. However, rigidly fixed carding needles typically require thicker steel needles to prevent plastic deformation or breakage during carding. This results in the fixed carding needles being unable to effectively open relatively medium or small cotton bundles in the main carding zone, thus hindering the improvement of carding efficiency. Furthermore, due to the risk of steel needle breakage, the fixed carding needles cannot employ a bent-knee structure similar to that shown in DE102007037055A1, thus limiting the removal of impurity fibers by the flat card cloth and making it unsuitable for carding cotton fibers.

[0006] Therefore, a new technical solution is needed to solve the above-mentioned technical problems. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide a combined cover plate for a carding machine that enables effective opening and impurity removal of fibers at the cover plate inlet and maintains a long-term stable process spacing at the tightest outlet spacing.

[0008] To solve the above technical problems, this utility model provides a combined cover plate for a carding machine, which is composed of a metal cover plate strip and an elastic cover plate strip. The metal cover plate strip and the elastic cover plate strip are detachably installed on the same cover plate frame through mounting grooves, and can be replaced individually without interference. The elastic cover plate strip is located near the fiber inlet, and the metal cover plate strip is located behind the elastic cover plate strip. The metal cover plate strip is composed of a metal needle cloth rack and a metal needle cloth rack support. The elastic cover plate strip is composed of steel needles implanted on the base fabric and the base fabric, and is manufactured using an elastic cover plate needle implantation machine.

[0009] By adopting the above technical solution, which combines metal cover strips and elastic cover strips, the advantages of rigid metal cover strips and elastic steel needle strips are combined. When the fiber type or carding process changes, the metal cover strips and elastic cover strips can be replaced separately without interference. Effective opening is achieved at the cover inlet, and the process spacing is maintained at the tightest point at the outlet, which facilitates higher output and carding quality, and is also conducive to flexible production.

[0010] Preferably, the ratio of the width L1 of the metal needle cloth support of the metal cover strip to the width L2 of the elastic needle cloth support of the elastic cover strip is L1 / L2=0.9~3.

[0011] When the ratio exceeds the above-mentioned technical solution, it is not conducive to processing and manufacturing, and there is a lack of practical application scenarios.

[0012] Preferably, the ratio of the width L1 of the metal needle cloth support of the metal cover strip to the width L3 of the metal toothed rack of the metal needle cloth is L3 / L1>0.7.

[0013] By adopting the above technical solution, when the ratio is less than this, it will not only lead to insufficient combing, but may even cause dirt that is difficult to clean to accumulate in areas without serrations, thereby deteriorating the overall combing effect.

[0014] Preferably, the height difference between the metal needle cloth height h1 of the metal cover strip and the elastic needle cloth height h2 of the elastic cover strip is |h1-h2|≦0.30mm, and preferably h1=h2.

[0015] By adopting the above technical solution, and ensuring that the height difference between the two is less than or equal to 0.30mm, it is convenient to adjust the process spacing, especially when the two heights are the same, the adjustment of the process spacing becomes particularly simple.

[0016] Preferably, the steel needles on the elastic cover strip have a cover steel needle working angle α, and the metal needle cloth rack on the metal cover strip has a metal needle cloth rack working angle β, where α < β and |α - β| ≦ 25°.

[0017] By adopting the above technical solution, the angle difference between the working angle of the cover plate steel needle and the working angle of the metal needle cloth rack is less than or equal to 25°, so that the metal needle cloth rack and steel needle can be effectively matched.

[0018] Preferably, the metal needle-cloth rack is made of high-carbon microalloyed steel with a carbon content ranging from 0.80% to 1.05%. The surface of the metal needle-cloth rack is coated with a wear-resistant coating formed by electroplating hard chrome, PVD, CVD, or electroless nickel-phosphorus plating.

[0019] By adopting the above technical solution, using high-carbon microalloyed steel, and coating its surface with electroplated hard chrome, PVD, CVD or chemically plated nickel-phosphorus wear-resistant coating, wear caused by combing fibers can be effectively alleviated.

[0020] Compared with the prior art, this utility model has the following advantages:

[0021] 1. This utility model adopts a combination of metal cover strips and elastic cover strips, which combines the advantages of rigid metal cover strips and elastic steel needle strips. When the fiber type or carding process changes, the metal cover strips and elastic cover strips can be replaced separately without interference. Effective opening and impurity removal are achieved at the cover inlet, and the process spacing is maintained at the tightest point at the outlet, which facilitates higher output and carding quality, and is also conducive to flexible production.

[0022] 2. This utility model consists of a metal cover strip, a metal needle cloth toothed strip, and a metal needle cloth toothed strip support. The ratio of the width L1 of the metal needle cloth support to the width L3 of the metal toothed strip is L3 / L1>0.7, which avoids insufficient combing and prevents hard-to-clean dirt from forming in areas without serrations, thus effectively improving the combing effect.

[0023] 3. The steel needles on the elastic cover strip of this utility model have a cover plate steel needle working angle α, and the metal needle cloth toothed rack on the metal cover strip has a metal needle cloth toothed rack working angle β, α<β and |α-β|≦25°, so that the metal needle cloth toothed rack and the steel needles can be effectively matched. Attached Figure Description

[0024] Figure 1 This is a side view of the present invention.

[0025] Figure 2 This is a perspective view of the present utility model.

[0026] Figure 3 This is a schematic diagram of the assembly of the metal cover strip 2 and the elastic cover strip 1 of this utility model.

[0027] Figure 4 This is a schematic diagram of the working angle of the cover plate steel needle of this utility model.

[0028] Figure 5 This is a schematic diagram of the working angle of the metal needle cloth rack of this utility model.

[0029] In the diagram, 1. Elastic cover strip, 2. Metal cover strip, 3. Cover frame, 4. Metal needle cloth rack, 5. Metal needle cloth rack bracket, 6. Base fabric, 7. Steel needle, 8. Mounting groove.

[0030] L0: Total width of cover plate; L1: Width of metal needle cloth support; L2: Width of elastic needle cloth support; L3: Width of metal rack; h1: Height of metal needle cloth; h2: Height of elastic needle cloth; α: Working angle of cover plate steel needle; β: Working angle of metal needle cloth rack. Detailed Implementation

[0031] like Figure 1As shown, a composite cover plate for a carding machine is composed of a metal cover plate strip 2 and an elastic cover plate strip 1. The metal cover plate strip 2 and the elastic cover plate strip 1 are mounted on the same cover plate frame 3, and are embedded in the mounting groove 8 of the cover plate frame 3. The metal cover plate strip 2 can be fixed in the mounting groove 8 with bolts and nuts, while the elastic cover plate strip 1 can be installed in the mounting groove 8 by adhesive bonding. The metal cover plate strip 2 and the elastic cover plate 1 can be replaced individually without interference. The metal cover plate strip 2 consists of a metal card cloth toothed strip 4 and a metal card cloth toothed strip support 5. The metal card cloth toothed strip 4 has a rigid structure, bearing a greater carding load than traditional carding card cloth, leading to faster wear. Therefore, it is usually necessary to strengthen the tooth tips to alleviate wear caused by carding fibers. The metal card cloth toothed strip 4 is made of high-carbon microalloy steel with a carbon content greater than 0.80%, and a wear-resistant coating formed by electroplating hard chrome, PVD, CVD, or chemical plating of nickel-phosphorus is applied to the surface of the metal card cloth toothed strip 4. The elastic cover strip 1 consists of steel needles 7 embedded in the base fabric 6 and the base fabric 6, manufactured using an elastic cover needle implantation machine. The parameters of the metal cover strip 2 and the elastic cover strip 1 are adjusted according to the different combed fibers, estimated based on classical combing theory or computer simulation calculations, and the final configuration is determined through actual machine testing. When the fiber type or combing process changes, the needle cloth is adjusted by installing new metal cover strips 2 and elastic cover strips 1. Replaced needle cloth strips can be temporarily stored, enabling flexible production when raw materials or processes change, which helps reduce production costs. This application adopts a combined structure that integrates the advantages of fixed and elastic cover plates. It can effectively open and remove impurities from the fiber bundle at the inlet, and maintain long-term stability of the process spacing at the tightest point of the outlet, avoiding the problem of unstable spacing in the main combing area at high speed and high output. It also solves the current problems of difficulty in controlling the flatness of the elastic cover plate and the deformation of the steel needles, as well as insufficient wear resistance of the cover plate needle tips, achieving long-term high efficiency and stability in combing effect.

[0032] The base fabric 6 is a composite of polymer and fiber materials. The polymer materials include natural rubber, modified natural rubber, synthetic rubber, polyurethane, polyvinyl chloride, polyamide, and other common engineering polymers. The fiber materials are natural cotton, linen, wool, etc., or synthetic or semi-synthetic fibers such as polyester, nylon, viscose, carbon fiber, and glass fiber, woven or non-woven into a fabric. The two materials are reinforced by interleaving and layering, and then combined through subsequent cross-linking and curing processes, such as vulcanization, photocuring, and dehydration cross-linking, to form a stable overall structure. Fiber accounts for more than half of the fabric. The base fabric is produced using roller-type extrusion equipment under heating conditions and has specific dimensions.

[0033] The steel needles 7 are arranged in a common satin or twill weave, either evenly or sparsely. These arrangements allow for both fiber impurity removal and combing during long-term use. These are classic arrangements.

[0034] like Figure 2 As shown, a single cover plate of a carding machine can be simply divided into an inlet area and an outlet area based on its function. The inlet area has a larger gap from the cylinder, and its main function is to break down larger fiber bundles and remove large particles and coarse neps from the fibers. The outlet area has a smaller gap from the cylinder, and its main function is to comb the fibers, making them parallel, and removing small particles, dust, and fine neps. The cover plate of the combined carding machine of this application is composed of an elastic cover plate strip 1 near the fiber inlet and a metal cover plate strip 2 located in the middle and rear. The use of an elastic cover plate strip 1 at the inlet can increase the density of the carding needles and achieve the opening of small and medium fiber bundles. Because the elastic cover plate strip 1 has an elastic structure, its opening of the fiber bundles is relatively gentle, thereby avoiding excessive damage to the fibers. When large cotton bundles pass through, the steel needles 7 can achieve elastic bending, forming a buffering effect. When a high-needle bent-knee structure is used, its ability to remove large particles of impurities can be maximized, forming cover plate flowers, and forming cotton waste under the action of the mechanism. Because this area is relatively far from the cylinder (typically greater than 0.6mm), deformation of the steel needles will not cause them to collide with the cylinder's card cloth. The exit area uses rigid metal serrations to perform the main combing function. Due to the rigidity of the metal card cloth toothed strips 4, there is no need to worry about deformation during combing causing instability in the process spacing, or even tooth collisions due to deformation. This allows for the design of smaller process spacings, thereby enhancing the combing effect. In some combing applications with extremely high quality requirements, the completely rigid structure at the exit allows for smaller process spacings than traditional elastic capping card cloths, without concern for mutual collisions between combing card cloths, resulting in superior combing performance. The combing area uses metal capping strips 2. Their rigid structure makes the dimensions of the installed metal capping strips 2 easy to measure, greatly improving the accuracy of height measurement. This makes the combing spacing easy to adjust and maintain long-term stability, contributing to improved combing quality. Furthermore, because the metal card cloth toothed strips 4 have stronger processing performance than elastic card cloths, a higher tooth density than capping steel needles 7 can be used in this area, further improving the combing degree of the fibers.

[0035] like Figure 3As shown, the combined structure adopted in this application can adjust the opening ratio and the combing ratio by adjusting the width L1 of the metal cover strip 2 and the width L2 of the elastic cover strip 1 according to the actual combing characteristics, thereby improving the adaptability of this application in various combing situations. According to general theory and practice, L1 / L2 needs to be satisfied as 0.9~3. When this ratio exceeds this range, it is not conducive to processing and manufacturing, and also lacks practical application scenarios.

[0036] The metal cover strip 2 of this application consists of a metal carding strip 4 and a metal carding strip support 5 with serrated teeth. In order to maximize the combing effect, the metal carding strip 4 needs to occupy the entire width as much as possible without affecting the structural strength of the metal carding strip support 5. Therefore, L3 / L1>0.7 is required. When it is less than this ratio, it will not only lead to insufficient combing, but may even cause dirt that is difficult to clean to grow in areas without serrated teeth, thereby deteriorating the overall combing effect.

[0037] This application achieves different combing requirements by adjusting the height difference between the metal cover strip 2 and the elastic cover strip 1. In applications requiring strong combing and light opening, the height h1 of the metal cover strip 2 can be appropriately increased; while in applications requiring high opening and light combing, the height h2 of the elastic cover strip 1 can be decreased. When the difference between h1 and h2 is too large, adjusting the process spacing becomes extra difficult. Therefore, it is required that |h1-h2|≦0.30mm, preferably h1=h2. When h1=h2 is preferred, adjusting the process spacing becomes particularly easy because all existing means of spacing adjustment can be used.

[0038] By adjusting the width, height, and relative angle of the metal cover strip 2 and the elastic cover strip 1, the ratio of impurity removal to combing during the combing process can be controlled, allowing the cover card cloth to better adapt to various differentiated requirements, meet various combing scenarios, and enhance the adaptability of the card cloth.

[0039] like Figure 4 , 5 As shown, this application can also achieve effective fiber transfer between cylinder cover plates by adjusting the working angle. Since the elastic cover plate strip 1 region uses a steel needle 7 structure, its fiber-accommodating capacity is higher than that of the metal needle cloth rack 4 region. This means it requires a relatively small angle α, while the metal cover plate strip 2 region requires a relatively large angle β. Based on theory and practical experience, the difference between the two cannot be too large, otherwise effective matching is impossible. Generally, α and β are required to satisfy α < β and |α - β| ≦ 25°. Example 1

[0040] This implementation case applies to conventional medium-high count machine-picked cotton. This raw material is characterized by the presence of certain impurities and high requirements for carding performance. Therefore, a longer metal cover strip 2 carding section is used to meet the higher carding requirements, while a shorter elastic cover strip 1 carding section is used to meet the impurity removal requirements. The height of the elastic cover strip 1 carding section is slightly lower than that of the metal cover strip 2 carding section to ensure that the metal cover strip 2 carding section can use a tighter spacing of less than 0.15mm to improve the carding effect. The width L1 of the metal card cloth support of this model is 2.6 times the width L2 of the elastic card cloth support, and the width L3 of the metal rack is 2.1 times the width L2 of the elastic card cloth support. The working angle β of the metal card cloth rack is 25°, and the working angle α of the cover steel needles is 17°. The height h1-h2=0.1mm.

[0041] This embodiment employs a rigid metal needle cloth toothed rack 4 structure in the tight spacing area of ​​the cover plate, which allows for a process spacing much lower than that of traditional combing processes, and can stably maintain this spacing, resulting in a durable, stable, and excellent combing effect. Example 2

[0042] This implementation case applies to the recycling of short fibers with high impurity content. This raw material is characterized by high impurity content, but the fibers are short and fragile. Therefore, the capping card cloth needs to possess both strong impurity removal capabilities and the ability to open large fiber bundles, while maintaining relatively weak carding capabilities to avoid fiber breakage due to over-carding. In this area, the elastic capping carding section and the metal card cloth carding section are flush, with h1=h2. The width L1 of the metal card cloth support for this model is twice the width L2 of the elastic card cloth support. The working angle β of the metal card cloth rack is 18°, and the working angle α of the capping steel needles is 12°.

[0043] 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, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A combined cover plate for a carding machine, characterized in that: It is composed of a metal cover strip (2) and an elastic cover strip (1). The metal cover strip (2) and the elastic cover strip (1) are detachably installed on the same cover frame (3) through the mounting groove (8) and can be replaced separately without interference. The elastic cover strip (1) is close to the fiber inlet, and the metal cover strip (2) is set on the rear side of the elastic cover strip (1). The metal cover strip (2) is composed of a metal needle cloth rack (4) and a metal needle cloth rack bracket (5). The elastic cover strip (1) is composed of a steel needle (7) implanted on the base cloth (6) and the base cloth (6), and is manufactured using an elastic cover plate needle implantation machine.

2. A combined cover plate for a carding machine according to claim 1, characterized in that: The ratio of the width L1 of the metal needle cloth support of the metal cover strip (2) to the width L2 of the elastic needle cloth support of the elastic cover strip (1) is L1 / L2=0.9~3.

3. A combined cover plate for a carding machine according to claim 2, characterized in that: The ratio of the width L1 of the metal needle cloth support of the metal cover strip (2) to the width L3 of the metal toothed rack of the metal needle cloth rack (4) is L3 / L1>0.

7.

4. A combined cover plate for a carding machine according to claim 1, characterized in that: The height difference between the metal needle cloth height h1 of the metal cover strip (2) and the elastic needle cloth height h2 of the elastic cover strip (1) is |h1-h2|≦0.30mm.

5. A combined cover plate for a carding machine according to claim 1, characterized in that: The steel needles (7) on the elastic cover strip (1) have a cover steel needle working angle α, and the metal needle cloth rack (4) on the metal cover strip (2) has a metal needle cloth rack working angle β, α<β and |α-β|≦25°.

6. A combined cover plate for a carding machine according to claim 1, characterized in that: The surface of the metal needle-cloth toothed rack (4) is coated with a wear-resistant coating formed by electroplating hard chrome, PVD, CVD or chemical plating of nickel and phosphorus.

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