A conical needle

Abstract

This utility model discloses a conical needle, including a needle handle, a needle shaft, and a needle head. A needle cap is provided on one side of the needle handle, and a limiting band is connected to the outside of the needle cap. The limiting band is connected to a connecting sleeve and fitted onto the end of the needle handle. A limiting sleeve is fitted onto the outside of the needle handle, and a threaded sleeve is provided inside the limiting sleeve. The needle shaft has a mating threaded post, and the two are threadedly connected with corresponding ends having magnetic attraction layers. The needle head has an arc-shaped, pointed conical structure with a high-precision polishing layer on the outside. The needle shaft has a specific taper and a high-hardness nitrided layer on the outside. The needle handle has anti-slip textures. This conical needle has a stable structure, is firmly assembled, has excellent puncture performance, strong wear resistance, and is easy to install and use. It can meet the needs of non-woven fabric processing, extend its service life, and is suitable for the non-woven fabric production field.

Description

Technical Field

[0001] This utility model relates to the technical field of nonwoven fabric processing equipment, specifically to a conical needle, which is mainly used in the needle punching process of nonwoven fabric. It achieves fiber entanglement reinforcement through the puncturing action of the fiber web and is suitable for the production and processing of various synthetic fiber and natural fiber nonwoven fabrics. Background Technology

[0002] Existing nonwoven fabric needles mostly adopt a straight rod structure, with abrupt changes in needle tip and rod diameter. This results in high fiber resistance during puncture, easily causing fiber breakage and damage to the nonwoven fabric surface. Traditional needle surface treatment processes are simple, resulting in poor wear resistance. After long-term use, wear and deformation easily occur, leading to decreased needle punching accuracy and affecting the quality stability of nonwoven fabric products. The connection structure between the needle body and the mounting components is poorly designed, easily leading to loosening, which not only affects processing efficiency but also increases equipment maintenance costs. Existing needles lack anti-slip performance, making installation and replacement inconvenient and increasing the labor intensity of workers. The connection strength between the needle rod and the needle tip is insufficient, making them prone to breakage after long-term, high-frequency puncture operations, shortening the lifespan of the needles. The threaded connection structure of traditional needles relies solely on the threads themselves for fixation, which is prone to loosening under high-speed vibration environments, affecting needle punching consistency.

[0003] Therefore, a tapered needle needs to be designed to solve the problems mentioned above. Utility Model Content

[0004] The purpose of this invention is to overcome the problems of poor structural stability, weak assembly, poor puncture performance, insufficient wear resistance, and low ease of use of existing conical needles used for nonwoven fabrics, and to provide a conical needle.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A conical needle includes a needle handle, a needle shaft, and a needle tip. A needle cap is fixedly installed on one side of the needle handle. A limiting band is integrally provided on the outer side of the needle cap. A connecting sleeve is integrally connected to the side of the limiting band away from the needle cap. The connecting sleeve is sleeved and installed at the end of the needle handle. A limiting sleeve is also sleeved and installed on the outer side of the needle handle, located on the side of the connecting sleeve. A threaded sleeve is provided inside the limiting sleeve on one side of the needle shaft. A threaded post is provided on the needle shaft on one side of the limiting sleeve to cooperate with the threaded sleeve.

[0006] Furthermore, the needle has a conical structure, and its outer surface is provided with a polishing layer with a polishing precision of Ra 0.01-0.02μm. The needle is arc-shaped and pointed with a radius of curvature of 0.05-0.1mm at its tip, and its length is 1.5-2mm. By optimizing the needle structure and surface treatment, its puncture performance can be effectively improved, and damage to the nonwoven fabric during puncture can be reduced. Furthermore, the outer surface of the needle bar is provided with a nitriding layer, the thickness of which is 5-8 μm and the surface hardness of which is HV800-1000; the diameter of the needle bar gradually increases from the end near the needle tip to the end near the needle shank, with a taper of 1:5-1:8. The nitriding layer can significantly improve the wear resistance and corrosion resistance of the needle bar, and extend its service life, while the specific taper design helps to enhance the overall structural strength of the needle bar. Furthermore, the outer surface of the needle handle is provided with anti-slip texture. The anti-slip texture is spiral in shape with a pitch of 1-1.5mm. The spiral anti-slip texture can increase the friction between the hand or installation tool and the needle handle, avoid slippage during installation and use, and improve the ease of operation. Furthermore, the needle cap and needle shank are integrally formed, with the diameter of the needle cap being larger than that of the needle shank. This integral forming structure ensures the firmness of the connection between the needle cap and needle shank, and the larger diameter of the needle cap also provides a certain limiting effect. The limiting band and connecting sleeve are integrally formed, with the inner diameter of the limiting band being larger than that of the connecting sleeve. This integral forming design ensures the structural stability of the limiting band and connecting sleeve, and the different inner diameters can be adapted to the installation requirements of different parts, improving the overall assembly stability. Furthermore, the threaded sleeve and the limiting sleeve are integrally formed. The inner wall of the threaded sleeve is provided with an internal thread, and the outer wall of the threaded column is provided with an external thread that matches the internal thread. The needle bar is threadedly connected to the threaded column, the threaded sleeve, and the limiting sleeve. The threaded connection facilitates the assembly and disassembly of the needle bar and the limiting sleeve while ensuring a tight connection. The inner end of the threaded sleeve and the axially corresponding end of the needle bar are provided with an inner magnetic attraction layer and an outer magnetic attraction layer that attract each other. After the threaded column is fully screwed into the threaded sleeve, the inner magnetic attraction layer and the outer magnetic attraction layer are magnetically connected. The magnetic attraction layer can further enhance the firmness of the connection between the needle bar and the limiting sleeve and prevent the threads from loosening during long-term use.

[0007] Compared with the prior art, the beneficial effects of this utility model are: This invention, through the design of a conical needle, achieves the following effects: 1. By designing the needle tip as a conical structure with a rounded tip, fiber resistance during puncture is effectively reduced, minimizing fiber breakage, thus addressing the problem of "high fiber resistance and easy breakage" in the prior art; 2. A high-precision polishing layer (Ra 0.01-0.02μm) is applied to the needle tip surface, further reducing puncture friction and solving the problem of surface damage to nonwoven fabric caused by the roughness of traditional needles; 3. A nitrided layer (thickness 5-8μm, hardness HV800-1000) is applied to the outer surface of the needle shaft, significantly improving the wear resistance and corrosion resistance of the needle body and extending its service life, thus addressing the defects of "poor wear resistance and easy wear" in traditional needles; 4. A spiral anti-slip texture (pitch 1-1.5mm) is applied to the needle handle, enhancing the grip stability during installation and reducing the cost of handling. 5. The design incorporates a dual fixing structure of threaded connection and magnetic attraction. After the threaded post is fully screwed in, the inner and outer magnetic attraction layers precisely adhere, solving the problem of loosening under high-speed vibration in traditional threaded connections and improving connection stability. 6. The integrated design of the limiting band and connecting sleeve, combined with the positioning function of the limiting sleeve, ensures the coaxiality of all parts of the needle body, improves acupuncture accuracy, and solves the problem of insufficient processing accuracy caused by assembly errors in traditional structures. 7. The needle cap and needle shank are integrally molded with a larger diameter, enhancing the strength of the needle root and effectively preventing breakage during high-frequency operations, thus solving the defects of "insufficient connection strength and easy breakage" in traditional needles. 8. The reasonable size gradient design of each component optimizes stress distribution, reduces stress concentration during use, and further extends the service life of the needle. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model; Figure 2 This is a schematic diagram of the planar structure of this utility model; Figure 3 This is a three-dimensional structural diagram of the needle bar and the limiting sleeve after disassembly.

[0009] In the diagram: 1. Needle handle; 2. Needle bar; 3. Needle tip; 4. Needle cap; 5. Limiting band; 6. Connecting sleeve; 7. Limiting sleeve; 8. Threaded sleeve; 9. Threaded post; 10. Polished layer; 11. Nitrided layer; 12. Anti-slip texture; 13. Inner magnetic layer; 14. Outer magnetic layer. Detailed Implementation

[0010] The technical solutions of the present utility model will be clearly and completely described below with reference to 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.

[0011] To facilitate understanding of this utility model, a more comprehensive description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are provided. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0012] Example 1 Please see Figure 1 This embodiment provides a conical needle, including a needle handle 1, a needle bar 2, and a needle tip 3. A needle cap 4 is fixedly installed on one side of the needle handle 1. A limiting band 5 is integrally provided on the outer side of the needle cap 4. A connecting sleeve 6 is integrally connected to the side of the limiting band 5 away from the needle cap 4. The connecting sleeve 6 is sleeved and installed at the end of the needle handle 1. A limiting sleeve 7 is sleeved and installed on the outer side of the needle handle 1, which is also located on the side of the connecting sleeve 6. A threaded sleeve 8 is provided inside the limiting sleeve 7 on one side of the needle bar 2. A threaded post 9 that cooperates with the threaded sleeve 8 is provided on the side of the limiting sleeve 7 on the needle bar 2.

[0013] Example 2 Please see Figure 2 Based on Example 1, this embodiment further defines the needle 3 as a conical structure, the outer surface of the needle 3 is provided with a polishing layer 10, and the polishing precision of the polishing layer 10 is Ra0.01-0.02μm, the outer surface of the needle bar 2 is provided with a nitriding layer 11, the thickness of the nitriding layer 11 is 5-8μm, and the surface hardness of the nitriding layer 11 is HV800-1000, and the outer surface of the needle handle 1 is provided with anti-slip texture 12, the anti-slip texture 12 is spiral, and the pitch is 1-1.5mm.

[0014] Example 3 Please see Figure 3 Based on Embodiment 1, this embodiment further specifies that the needle cap 4 and the needle shank 1 are integrally formed, the diameter of the needle cap 4 is larger than the diameter of the needle shank 1, the limiting band 5 and the connecting sleeve 6 are integrally formed, the inner diameter of the limiting band 5 is larger than the inner diameter of the connecting sleeve 6, the threaded sleeve 8 and the limiting sleeve 7 are integrally formed, the inner wall of the threaded sleeve 8 is provided with internal threads, the outer wall of the threaded post 9 is provided with external threads adapted to the internal threads, and the needle bar 2 is threadedly connected through the threaded post 9, the threaded sleeve 8 and the limiting sleeve 7. Example 4 Please see Figure 3 Based on embodiment 1, this embodiment further specifies that an inner magnetic layer 13 and an outer magnetic layer 14 are provided between the inner end of the threaded sleeve 8 and the axially corresponding end of the needle bar 2, which attract each other. After the threaded column 9 is completely screwed into the threaded sleeve 8, the inner magnetic layer 13 and the outer magnetic layer 14 are magnetically connected. The needle tip 3 is arc-shaped and pointed, with a top curvature radius of 0.05-0.1mm and a length of 1.5-2mm. The diameter of the needle bar 2 gradually increases from the end near the needle tip 3 to the end near the needle handle 1, with a taper of 1:5-1:8.

[0015] The working process of this utility model is as follows: When using the tapered needle for nonwoven fabrics, firstly, the needle handle 1 is machined, and a spiral anti-slip texture 12 is made on its outer surface, controlling the pitch within the range of 1-1.5mm. At the same time, a forming position for the needle cap 4 is reserved on one side of the needle handle 1. The needle cap 4 is made using an integral molding process, ensuring that the diameter of the needle cap 4 is larger than the diameter of the needle handle 1. Then, the needle bar 2 is machined, with a taper of 1:5-1:8, so that the diameter of the needle bar 2 gradually increases from the end near the needle tip 3 towards the end near the needle handle 1. The needle bar 2 gradually increases in size; a threaded post 9 is machined on the side of the needle bar 2 near the limiting sleeve 7, and a nitriding layer 11 with a thickness of 5-8 μm is prepared on the outer surface of the needle bar 2 to ensure that the surface hardness of the nitriding layer 11 reaches HV800-1000; at the same time, an outer magnetic layer 14 is set at the position of the inner end of the threaded sleeve 8 corresponding to the axial direction of the needle bar 2, and the needle tip 3 is machined, making the needle tip 3 into an arc-shaped tip, controlling the radius of curvature of the tip to be 0.05-0.1 mm and the length to be 1.5-2 mm, adopting a conical structure design, and on the outer surface of the needle tip 3... A polishing layer 10 is prepared to achieve a polishing precision of Ra 0.01-0.02μm. A limiting sleeve 7 is machined, and a threaded sleeve 8 is integrally formed inside the limiting sleeve 7 on one side of the needle bar 2. An internal thread is machined on the inner wall of the threaded sleeve 8. At the same time, an inner magnetic layer 13 is set at the inner end of the threaded sleeve 8 to ensure that the inner magnetic layer 13 and the outer magnetic layer 14 on the needle bar 2 can attract each other. A limiting band 5 and a connecting sleeve 6 are machined, and the limiting band 5 and the connecting sleeve 6 are made using an integral molding process to ensure that the inner diameter of the limiting band 5 is larger than that of the connecting sleeve 6. The inner diameter is determined, and the limiting band 5 can be integrally connected with the needle cap 4. The dimensions of the processed needle shank 1, needle bar 2, needle head 3, limiting sleeve 7, limiting band 5, connecting sleeve 6 and other components are inspected to ensure that the dimensions of each component meet the design requirements, such as the taper of the needle bar 2, the radius of curvature and length of the needle head 3, the pitch of the anti-slip texture 12, etc. The polishing precision of the polishing layer 10 of the needle head 3, the thickness and surface hardness of the nitriding layer 11 of the needle bar 2, and the adsorption performance of the inner magnetic layer 13 and the outer magnetic layer 14 are inspected to ensure that each performance parameter meets the standard. Connect the side of the limiting band 5 away from the connecting sleeve 6 to the outside of the needle cap 4 to ensure a firm connection. Then, install the connecting sleeve 6 on the end of the needle handle 1 so that the connecting sleeve 6 and the needle handle 1 fit tightly. Install the limiting sleeve 7 on the outside of the needle handle 1 and on one side of the connecting sleeve 6. Then, connect the threaded post 9 on the needle bar 2 to the threaded sleeve 8 inside the limiting sleeve 7. Rotate the needle bar 2 to gradually screw the threaded post 9 into the threaded sleeve 8. Continue to rotate the needle bar 2 until the threaded post 9 is completely screwed into the threaded sleeve 8. At this time, the inner magnetic layer 13 at the inner end of the threaded sleeve 8 and the outer magnetic layer 14 on the needle bar 2 are magnetically connected. The assembly of the limiting sleeve 7 and the needle bar 2 is completed, ensuring a stable connection. Connect the processed and inspected needle head 3 to the end of the needle bar 2 near the needle head 3. Welding or other fixed connection methods can be used to ensure that the needle head 3 and the needle bar 2 are firmly connected and that the tapered structure of the needle head 3 and the tapered transition of the needle bar 2 are natural. The assembled tapered needle undergoes structural testing to check the firmness of each component connection, such as the connection between the needle cap 4 and the needle handle 1, the connection between the limiting band 5 and the needle cap 4, the connection between the connecting sleeve 6 and the needle handle 1, the connection between the limiting sleeve 7 and the needle bar 2, and the connection between the needle head 3 and the needle bar 2. The performance of the tapered needle is also tested, such as the puncture performance of the needle head 3, the strength of the needle bar 2, and the anti-slip effect of the anti-slip texture 12, to ensure that the tapered needle can meet the requirements of non-woven fabric processing. The qualified conical needles are installed on the nonwoven fabric processing equipment. The limiting band 5 makes installation easy and secure. The anti-slip texture 12 on the outer surface of the needle handle 1 ensures that it is not easy to slip during installation. During installation, avoid damaging the polishing layer 10 of the needle tip 3. In the nonwoven fabric processing, the needle tip 3 of the conical needle is used to perform operations such as piercing the nonwoven fabric. The nitrided layer 11 of the needle bar 2 can improve the wear resistance and strength of the needle bar 2 and extend the service life of the conical needle. The magnetic attraction between the inner magnetic layer 13 and the outer magnetic layer 14 can prevent the needle bar 2 and the limiting sleeve 7 from loosening during use.

[0016] 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 conical needle, characterized in that: The device includes a needle handle (1), a needle bar (2), and a needle tip (3). A needle cap (4) is fixedly installed on one side of the needle handle (1). A limiting band (5) is integrally provided on the outer side of the needle cap (4). A connecting sleeve (6) is integrally connected to the side of the limiting band (5) away from the needle cap (4). The connecting sleeve (6) is sleeved and installed at the end of the needle handle (1). A limiting sleeve (7) is sleeved and installed on the outer side of the needle handle (1) on the side of the connecting sleeve (6). A threaded sleeve (8) is provided inside the limiting sleeve (7) on one side of the needle bar (2). A threaded post (9) that cooperates with the threaded sleeve (8) is provided on the side of the limiting sleeve (7) on the needle bar (2).

2. A conical needle according to claim 1, characterized in that: The needle (3) has a conical structure, and the outer surface of the needle (3) is provided with a polishing layer (10), and the polishing precision of the polishing layer (10) is Ra0.01-0.02μm.

3. A conical needle according to claim 1, characterized in that: The outer surface of the needle bar (2) is provided with a nitrided layer (11), the thickness of the nitrided layer (11) is 5-8μm, and the surface hardness of the nitrided layer (11) is HV800-1000.

4. A conical needle according to claim 1, characterized in that: The outer surface of the needle handle (1) is provided with anti-slip texture (12), which is spiral in shape and has a pitch of 1-1.5mm.

5. A conical needle according to claim 1, characterized in that: The needle cap (4) and the needle handle (1) are integrally formed. The diameter of the needle cap (4) is larger than the diameter of the needle handle (1). The limiting band (5) and the connecting sleeve (6) are integrally formed. The inner diameter of the limiting band (5) is larger than the inner diameter of the connecting sleeve (6).

6. A conical needle according to claim 1, characterized in that: The threaded sleeve (8) and the limiting sleeve (7) are integrally formed. The inner wall of the threaded sleeve (8) is provided with an internal thread, and the outer wall of the threaded column (9) is provided with an external thread that matches the internal thread. The needle rod (2) is threadedly connected by the threaded column (9), the threaded sleeve (8) and the limiting sleeve (7).

7. A conical needle according to claim 1, characterized in that: The inner end of the threaded sleeve (8) and the axially corresponding end of the needle bar (2) are provided with an inner magnetic layer (13) and an outer magnetic layer (14) that attract each other. After the threaded column (9) is completely screwed into the threaded sleeve (8), the inner magnetic layer (13) and the outer magnetic layer (14) are magnetically connected.

8. A conical needle according to claim 1, characterized in that: The needle (3) is arc-shaped and pointed, with a radius of curvature of 0.05-0.1 mm at its tip, and a length of 1.5-2 mm.

9. A conical needle according to claim 1, characterized in that: The diameter of the needle bar (2) gradually increases from the end near the needle tip (3) to the end near the needle handle (1), with a taper of 1:5-1:8.

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