A nonwoven fabric unwinding device for the production of medical masks

Abstract

This utility model discloses a nonwoven fabric unwinding device for medical mask production, relating to the field of nonwoven fabric unwinding technology. It includes a mounting base on which an unwinding mechanism for nonwoven fabric used in medical mask production is mounted. The unwinding mechanism includes: precise adjustment of the conveyor shaft spacing via threaded transmission to adapt to different thicknesses of medical nonwoven fabric; a sliding groove to ensure stable sliding of the connecting bracket, preventing tilting of the second conveyor shaft and improving conveying smoothness; linear drive of an electric push rod to adjust the clamping force, controlling the pressure of the pressure shaft based on the toughness characteristics of the medical nonwoven fabric to avoid fiber damage due to overpressure or loosening due to insufficient pressure; automated adjustment to reduce manual operation intensity; and a limiting shaft that can adjust its position in real time according to the width of the nonwoven fabric to prevent edge deviation due to uneven tension during unwinding, ensuring stability during conveying.

Description

Technical Field

[0001] This utility model relates to the field of nonwoven fabric unwinding technology, specifically a nonwoven fabric unwinding device for the production of medical masks. Background Technology

[0002] With the increasing global awareness of public health and the continued growth in demand for medical protection, the market demand for medical masks, as an important protective product, has shown explosive growth. Non-woven fabric, as the core raw material for medical masks, plays a crucial role in ensuring continuous production and product quality through a stable and efficient supply and high-quality unwinding process.

[0003] Reference patent (publication number: CN218778438U; publication date: 2023-03-31) discloses a high-toughness nonwoven fabric unwinding device, belonging to the field of nonwoven fabric technology. The key technical points of the device include a base plate, an installation mechanism at one end of the upper surface of the base plate, positioning mechanisms at both ends of the installation mechanism, a pressing mechanism at one end of the installation mechanism, a conveying mechanism at one end of the pressing mechanism, and an adjustment mechanism on the upper surface of the conveying mechanism. This device allows for convenient placement or removal of the fabric roll, saving time and improving unwinding efficiency. It also prevents the fabric from being over-wound due to inertia during the unwinding process, which could lead to fabric accumulation and looseness, seriously affecting the quality of nonwoven fabric unwinding.

[0004] Based on the aforementioned patent, the adjustment mechanism adjusts the distance between the conveying rollers through two sets of screws, lacking a synchronous guiding structure. This easily leads to the tilting of the second conveying roller, affecting the flatness of the fabric. Furthermore, during the unwinding process, the nonwoven fabric is prone to edge deviation and wrinkles due to uneven tension or external interference during transport. In existing unwinding devices, some equipment lacks an effective limiting mechanism, making it impossible to adjust the limiting position in real time according to the width of the nonwoven fabric. This causes the nonwoven fabric to easily deviate from the normal transport track during unwinding. At the same time, existing unwinding devices have limited measures to prevent wrinkles in nonwoven fabrics, mostly adopting a simple fixed roller pressing method. The position and movement of the roller shaft remain unchanged, making it impossible to perform comprehensive and uniform roller pressing on the nonwoven fabric. Therefore, this utility model provides a nonwoven fabric unwinding device for the production of medical masks. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a nonwoven fabric unwinding device for the production of medical masks. It solves the problems of existing unwinding devices where the adjustment mechanism uses two sets of screws to adjust the distance between the conveying rollers, lacking a synchronous guiding structure, which easily leads to the second conveying roller tilting, affecting the flatness of the fabric. Furthermore, during the unwinding process, the nonwoven fabric is prone to edge shifting and wrinkling due to uneven tension or external interference during transport. In some existing unwinding devices, effective limiting mechanisms are not provided, making it impossible to adjust the limiting position in real time according to the width of the nonwoven fabric, causing the nonwoven fabric to easily deviate from the normal transport track during unwinding. Additionally, in the rolling stage, some devices use a single roller movement mode, with only a single roller cooperating with the self-contained material for rolling, making it difficult to eliminate wrinkles.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a nonwoven fabric unwinding device for medical mask production, comprising a mounting base, wherein an unwinding mechanism for nonwoven fabric production is provided on the mounting base, the unwinding mechanism comprising: The clamping assembly includes a support frame fixed to the upper end of the mounting base, a mounting bracket fixed to the upper end of the support frame, a second conveying shaft connected to the mounting bracket via a threaded assembly inside the mounting bracket, a support rod rotatably connected to the side wall of the support frame via a rotating shaft, a pressure shaft connected to one end of the support rod via a pushing assembly, and a limiting shaft connected to the inner side of the support rod via a telescopic assembly. The roller pressing assembly includes a U-shaped bracket fixed at the center of the upper surface of the mounting base, wherein a slide rail bracket connected by a lifting assembly is provided inside the U-shaped bracket, and a roller shaft connected by a reciprocating assembly is provided inside the slide rail bracket.

[0007] Preferably, the threaded assembly includes a bolt internally threaded to the mounting bracket, a groove is provided on the inner wall of the mounting bracket, a connecting bracket is slidably connected inside the groove, the second conveying shaft is rotatably connected inside the connecting bracket, the lower end of the bolt is rotatably connected to the upper end of the connecting bracket, the inner wall of the support frame is rotatably connected to a first conveying shaft, and the first conveying shaft is located below the second conveying shaft.

[0008] Preferably, the jacking assembly includes a first electric push rod rotatably connected to the side wall of the support frame via a rotating shaft. The telescopic end of the first electric push rod is rotatably connected to the support rod via the rotating shaft, and the pressure shaft is rotatably connected to one end of the support rod.

[0009] Preferably, the telescopic assembly includes a second electric push rod that is fixedly inserted through the support rod, and the telescopic end of the second electric push rod is fixed with a fixed bracket, and the limiting shaft is rotatably connected inside the fixed bracket.

[0010] Preferably, the lifting assembly includes a U-shaped bracket, a hydraulic rod is fixedly fixed inside the U-shaped bracket, and the slide rail bracket is fixedly connected to the lower end of the hydraulic rod.

[0011] Preferably, the reciprocating assembly includes a reciprocating lead screw rotatably connected inside a slide rail bracket, a slider threadedly connected to the reciprocating lead screw and slidably connected to the inner wall of the slide rail bracket, a mounting plate fixed to the lower end of the slider, a mounting seat provided at the lower end of the mounting plate, and a roller shaft rotatably connected inside the mounting seat. Beneficial effects

[0012] This invention provides a nonwoven fabric unwinding device for the production of medical masks. Compared with the prior art, it has the following advantages: Firstly, this invention achieves precise adjustment of the conveyor shaft spacing through threaded transmission, adapting to medical nonwoven fabrics of different thicknesses. The sliding groove ensures stable sliding of the connecting bracket, preventing the second conveyor shaft from tilting and improving conveying smoothness. Then, the linear drive of the electric push rod can adjust the clamping force, controlling the downward pressure of the pressure shaft according to the toughness characteristics of the medical nonwoven fabric, avoiding fiber damage caused by excessive pressure or loosening caused by insufficient pressure. At the same time, the automatic adjustment reduces the intensity of manual operation, and the limiting shaft can adjust the limiting position in real time according to the width of the nonwoven fabric to prevent edge deviation caused by uneven tension during unwinding, ensuring stability during conveying.

[0013] Secondly, when the reciprocating screw rotates, the slider slides back and forth along the inner wall of the slide rail bracket. Through the mounting plate and mounting seat, the roller shaft is driven to make uniform back-and-forth motion on the surface of the nonwoven fabric, realizing full-width rolling. It can cover the full width range of the nonwoven fabric, effectively preventing wrinkles and improving the quality of the nonwoven fabric. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the mounting bracket structure of this utility model; Figure 3 This is a schematic diagram of the roller structure of this utility model; Figure 4 This is a schematic diagram of the slide rail bracket structure of this utility model.

[0015] In the diagram: 1. Mounting base; 2. Support frame; 201. First conveyor shaft; 202. Mounting bracket; 203. Slide groove; 204. Connecting bracket; 205. Second conveyor shaft; 206. Bolt; 3. Support rod; 301. Pressure shaft; 302. First electric push rod; 4. Second electric push rod; 401. Fixed bracket; 402. Limiting shaft; 5. U-shaped bracket; 501. Slide rail bracket; 502. Mounting seat; 503. Roller shaft; 504. Hydraulic rod; 6. Reciprocating screw; 601. Slider; 602. Mounting plate. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-4 This utility model provides a technical solution: a non-woven fabric unwinding device for medical mask production, including a mounting base 1, on which an unwinding mechanism for non-woven fabric production of medical masks is provided, the unwinding mechanism including: The clamping assembly includes a support frame 2 fixed to the upper end of the mounting base 1, a mounting bracket 202 fixed to the upper end of the support frame 2, a second conveying shaft 205 connected by a threaded assembly inside the mounting bracket 202, a support rod 3 rotatably connected by a rotating shaft on the side wall of the support frame 2, a pressure shaft 301 connected by a pushing assembly at one end of the support rod 3, and a limiting shaft 402 connected by a telescopic assembly on the inner side of the support rod 3. The roller pressing assembly includes a U-shaped bracket 5 fixed at the center of the upper surface of the mounting base 1. The U-shaped bracket 5 has a slide rail bracket 501 connected by a lifting assembly inside, and a roller 503 connected by a reciprocating assembly inside the slide rail bracket 501.

[0018] In a preferred embodiment, the threaded assembly includes a bolt 206 threadedly connected inside the mounting bracket 202, a groove 203 is provided on the inner wall of the mounting bracket 202, a connecting bracket 204 is slidably connected inside the groove 203, a second conveying shaft 205 is rotatably connected inside the connecting bracket 204, the lower end of the bolt 206 is rotatably connected to the upper end of the connecting bracket 204, and a first conveying shaft 201 is rotatably connected to the inner wall of the support frame 2, and the first conveying shaft 201 is located below the second conveying shaft 205.

[0019] The pressing component achieves the conveying and tensioning of nonwoven fabric through the cooperation of the first conveying shaft 201 and the second conveying shaft 205. The first conveying shaft 201 is driven by a motor and cooperates with the second conveying shaft 205 to convey the nonwoven fabric.

[0020] Furthermore, by rotating the bolt 206, since the bolt 206 is threadedly connected to the mounting bracket 202 and its lower end is rotatably connected to the connecting bracket 204, the connecting bracket 204 slides in the slide groove 203, thereby driving the second conveying shaft 205 to move up and down, adjusting the distance between it and the first conveying shaft 201 to adapt to the conveying needs of nonwoven fabrics of different thicknesses.

[0021] In a preferred embodiment, the push assembly includes a first electric push rod 302 rotatably connected to the side wall of the support frame 2 via a rotating shaft. The telescopic end of the first electric push rod 302 is rotatably connected to the support rod 3 via the rotating shaft. The pressure shaft 301 is rotatably connected to one end of the support rod 3 and is used to adjust the pressure of conveying the nonwoven fabric. When the first electric push rod 302 is activated, the telescopic end of the first electric push rod 302 extends and retracts. Since its two ends are rotatably connected to the support frame 2 and the support rod 3 respectively via rotating shafts, it pushes the support rod 3 to rotate around the rotating shaft, thereby driving the pressure shaft 301 to move and adjusting the pressure of the pressure shaft 301 on the nonwoven fabric to ensure stable conveying of the nonwoven fabric.

[0022] In a preferred embodiment, the telescopic assembly includes a second electric push rod 4 that is fixedly inserted through the support rod 3. The telescopic end of the second electric push rod 4 is fixed with a fixed bracket 401. A limiting shaft 402 is rotatably connected inside the fixed bracket 401. When the second electric push rod 4 is activated, the telescopic end of the second electric push rod 4 extends and retracts, driving the fixed bracket 401 to move, thereby causing the limiting shaft 402 to move and limit the nonwoven fabric to prevent the nonwoven fabric from deviating during the conveying process.

[0023] In a preferred embodiment, the lifting assembly includes a U-shaped bracket 5, with a hydraulic rod 504 fixedly fixed inside the U-shaped bracket 5. A slide rail bracket 501 is fixedly connected to the lower end of the hydraulic rod 504. The reciprocating assembly includes a reciprocating screw 6 rotatably connected inside the slide rail bracket 501. A slider 601 threadedly connected to the reciprocating screw 6 is slidably connected to the inner wall of the slide rail bracket 501. A mounting plate 602 is fixed to the lower end of the slider 601. A mounting seat 502 is provided at the lower end of the mounting plate 602. A roller 503 is rotatably connected inside the mounting seat 502. The roller 503 reciprocates and rolls the conveyed nonwoven fabric to prevent wrinkles.

[0024] Furthermore, when the hydraulic rod 504 extends or retracts, it drives the slide rail bracket 501 and roller 503 to rise and fall as a whole, adjusting the contact pressure between the roller 503 and the nonwoven fabric. The rolling depth can be precisely controlled according to the thickness and wrinkle degree of the nonwoven fabric. Considering the fluffy characteristics of medical nonwoven fabric, when the reciprocating screw 6 is rotated by the motor, the slider 601 slides back and forth along the inner wall of the slide rail bracket 501. Through the mounting plate 602 and the mounting seat 502, the roller 503 is driven to make uniform back-and-forth motion on the surface of the nonwoven fabric, realizing full rolling.

[0025] The electric linear actuator is model DT-500, the hydraulic actuator is model HOB-80, and the motor is model 5IK120RGN-CF. All of these are existing technologies and will not be discussed in detail.

[0026] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0027] The working process of the nonwoven fabric unwinding device for medical mask production is as follows: In the pressing assembly, the first conveying shaft 201 rotates under the drive of the motor, cooperating with the second conveying shaft 205 to convey the nonwoven fabric. By rotating the bolt 206, since the bolt 206 is threadedly connected to the mounting bracket 202 and its lower end is rotatably connected to the connecting bracket 204, the connecting bracket 204 slides in the slide groove 203, driving the second conveying shaft 205 to move up and down, adjusting its distance from the first conveying shaft 201 to accommodate nonwoven fabrics of different thicknesses; the first electric push rod 302 is activated, and its telescopic end extends and retracts. Since both ends are rotatably connected to the support frame 2 and the support rod 3 respectively through the rotating shaft, the support rod 3 is pushed to rotate around the rotating shaft, driving the pressure shaft 301 to move to adjust the pressure on the nonwoven fabric and ensure stable conveying; The second electric push rod 4 is activated, and its telescopic end extends and retracts, causing the fixed bracket 401 to move, thereby moving the limiting shaft 402 to limit the nonwoven fabric and prevent deviation. In the roller pressing assembly, when the hydraulic rod 504 extends and retracts, it drives the slide rail bracket 501 and the roller shaft 503 to rise and fall as a whole, adjusting the contact pressure between the roller shaft 503 and the nonwoven fabric to accurately control the roller pressing depth according to the thickness and wrinkle degree of the nonwoven fabric. When the reciprocating screw 6 rotates, the slider 601 slides back and forth along the inner wall of the slide rail bracket 501, driving the roller shaft 503 to make uniform back-and-forth motion on the surface of the nonwoven fabric through the mounting plate 602 and the mounting seat 502, achieving full roller pressing and preventing wrinkles from forming.

[0028] 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.

[0029] 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 non-woven fabric unwinding device for medical mask production, comprising a mounting base (1), characterized in that: The mounting base (1) is equipped with an unwinding mechanism for producing nonwoven fabric for medical masks. The unwinding mechanism includes: The clamping assembly includes a support frame (2) fixed at the upper end of the mounting base (1), a mounting bracket (202) fixed at the upper end of the support frame (2), a second conveying shaft (205) connected by a threaded assembly is provided inside the mounting bracket (202), a support rod (3) rotatably connected by a rotating shaft is provided on the side wall of the support frame (2), a pressure shaft (301) connected by a push assembly is provided at one end of the support rod (3), and a limiting shaft (402) connected by a telescopic assembly is provided on the inner side of the support rod (3). The roller pressing assembly includes a U-shaped bracket (5) fixed at the center of the upper end face of the mounting base (1), and a slide rail bracket (501) connected by a lifting assembly is provided inside the U-shaped bracket (5). A roller shaft (503) connected by a reciprocating assembly is provided inside the slide rail bracket (501).

2. The nonwoven fabric unwinding device for medical mask production according to claim 1, characterized in that: The threaded assembly includes a bolt (206) threaded inside the mounting bracket (202). The inner wall of the mounting bracket (202) is provided with a groove (203). A connecting bracket (204) is slidably connected inside the groove (203). The second conveying shaft (205) is rotatably connected inside the connecting bracket (204). The lower end of the bolt (206) is rotatably connected to the upper end of the connecting bracket (204). The inner wall of the support frame (2) is rotatably connected to a first conveying shaft (201), and the first conveying shaft (201) is located below the second conveying shaft (205).

3. The nonwoven fabric unwinding device for medical mask production according to claim 1, characterized in that: The jacking assembly includes a support frame (2) with a first electric push rod (302) rotatably connected to the side wall via a rotating shaft. The telescopic end of the first electric push rod (302) is rotatably connected to the support rod (3) via the rotating shaft. The pressure shaft (301) is rotatably connected to one end of the support rod (3).

4. The nonwoven fabric unwinding device for medical mask production according to claim 1, characterized in that: The telescopic assembly includes a second electric push rod (4) that is fixed inside the support rod (3). The telescopic end of the second electric push rod (4) is fixed with a fixed bracket (401). The limiting shaft (402) is located inside the fixed bracket (401) and rotated.

5. A nonwoven fabric unwinding device for medical mask production according to claim 1, characterized in that: The lifting assembly includes a U-shaped bracket (5), and a hydraulic rod (504) is fixedly fixed inside the U-shaped bracket (5). The slide rail bracket (501) is fixedly connected to the lower end of the hydraulic rod (504).

6. The nonwoven fabric unwinding device for medical mask production according to claim 1, characterized in that: The reciprocating assembly includes a reciprocating lead screw (6) rotatably connected inside a slide rail bracket (501). A slider (601) threadedly connected to the reciprocating lead screw (6) is slidably connected to the inner wall of the slide rail bracket (501). A mounting plate (602) is fixed to the lower end of the slider (601). A mounting seat (502) is provided at the lower end of the mounting plate (602). The roller (503) is rotatably connected inside the mounting seat (502).

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