A multifunctional spunbond air attenuator

Abstract

This application relates to the field of spunbond drafting technology, and in particular to a multifunctional spunbond airflow drafter. A multifunctional spunbond airflow drafter includes a traction component and an airflow oscillation splitting component. The filament outlet end of the traction component is connected to the filament inlet end of the airflow oscillation splitting component. Symmetrical traction air inlets are connected to both sides of the traction component, and the angle between the central axis of the traction air inlets and the vertical plane is controlled to be 15-45°. The distance from the connection point between the traction component and the traction air inlets to the top surface of the traction component is equal to 0.5-0.8 times the length of the traction component. This invention provides a multifunctional spunbond airflow drafter that utilizes an airflow oscillator structure in the spunbond positive pressure airflow drafting process. It has functions of airflow drafting, filament splitting, and potential crimped fiber preparation, which can improve the overall production efficiency of spunbond nonwoven fabrics. Simultaneously, it can increase the width of the prepared spunbond nonwoven fabrics, reduce overall production energy consumption, and is more energy-efficient and environmentally friendly.

Description

Technical Field

[0001] This application relates to the field of spinning and drawing technology, and in particular to a multifunctional spunbond airflow drawing device. Background Technology

[0002] Spunbond is a processing method that directly spins polymers into a web and synthesizes nonwoven fabrics. It is mainly used to process nonwoven fabrics made of polypropylene, polyethylene, polypropylene, polyester, and nylon filaments, and also includes the production of filament nonwoven fabrics by wet spinning.

[0003] refer to Figure 1 The existing spunbond process utilizes equipment including a screw extruder, metering pump, spinning box, positive or negative pressure traction device, fiber splitting / spinning device, web forming device, and reinforcing / heat setting rollers. The fiber splitting / spinning device includes external spinnerets, external airflow fiber splitting devices, and electrostatic fiber splitting devices. The positive pressure traction device is powered by converging airflow injected into the drafting pipe. The high-speed airflow within the pipe stretches and thins the polymer fibers. Because a high-speed drafting airflow needs to be formed, the cross-sectional area of ​​the airflow channel is often small (to facilitate the convergence of high-speed airflow). Therefore, the spunbond drafter is equipped with an expansion structure to facilitate fiber splitting, allowing the fibers to fall onto the receiving screen over a wider range, thus defining the width of the spunbond nonwoven fabric. The spinning raw material is placed in a screw extruder for melt extrusion. The resulting molten material is quantitatively transferred to the spinning box under the action of a metering pump and ejected through the spinneret of the spinning box. The ejected filaments are transferred downward to the web forming device through a positive or negative pressure traction device. The web is laid on the web forming device. The resulting web layer is heat-set, cooled and wound up under the action of a reinforcing / heat-setting roller group to obtain spunbond nonwoven fabric.

[0004] Regarding the spunbond process in the prior art, the applicant has discovered the following drawbacks: the equipment used in the prior art spunbond process must include a filament splitting / arranging device, which increases the energy consumption due to the mechanical movement of the filament splitting / arranging. If non-standard widths are required, additional widening processes such as cross-laying are necessary, resulting in low production efficiency and high energy consumption. To solve the above technical problems, this invention provides a multifunctional spunbond airflow drafter. Summary of the Invention

[0005] To address the technical challenges of low production efficiency and high energy consumption in existing technologies, this invention provides a multifunctional spunbond airflow stretcher that can improve the overall production efficiency of spunbond nonwoven fabrics. It can also increase the width of the produced spunbond nonwoven fabrics, reduce overall energy consumption, save energy and protect the environment, provide a driving force for enterprise transformation, reduce necessary labor time in the industry, lower overall production costs, enhance social productivity, and benefit consumers.

[0006] The multifunctional spunbond airflow stretcher provided in this application is achieved through the following scheme:

[0007] A multifunctional spunbond airflow drafter includes a traction component and an airflow oscillation splitting component. The filament outlet end of the traction component is connected to the filament inlet end of the airflow oscillation splitting component. Symmetrical traction air inlet pipes are connected to both sides of the traction component. The angle between the central axis of the traction air inlet pipe and the vertical plane is controlled to be 15-45°. The distance from the connection position of the traction component and the traction air inlet pipe to the top surface of the traction component is equal to 0.5-0.8 times the length of the traction component.

[0008] This invention provides a multifunctional spunbond airflow drafter that utilizes an airflow oscillator structure in the spunbond positive pressure airflow drafting process. It features airflow drafting, fiber splitting, and potential crimping fiber preparation functions. It achieves efficient fiber splitting without the need for external fiber splitting / arranging devices, thereby improving the overall production efficiency of spunbond nonwoven fabrics. Simultaneously, it can increase the width of the prepared spunbond nonwoven fabrics, reduce overall production energy consumption, and promote energy conservation and environmental protection. This provides a driving force for enterprise transformation, reduces necessary labor time in the industry, lowers overall production costs, enhances social productivity, and benefits consumers.

[0009] Preferably, the airflow oscillation splitting assembly includes a main pipe, a return loop pipe, and an outlet guide pipe. One end of the main pipe is connected to the yarn outlet end of the traction assembly, and the other end of the main pipe is connected to the outlet guide pipe. One end of the return loop pipe is connected to the circumferential direction of the yarn inlet end of the main pipe, and the other end of the return loop pipe is connected to the circumferential direction of the bottom of the main pipe. The angle between the central axis of the return loop pipe connected to the circumferential direction of the bottom of the main pipe and the vertical plane is controlled to be 70-85°.

[0010] Preferably, the angle between the central axis of the return loop pipe connected to the bottom circumference of the main pipe and the vertical plane is controlled to be 74-80°.

[0011] Preferably, the length of the airflow oscillation splitting assembly is 15-30cm; the length of the traction assembly is 30-75cm; and the length of the airflow oscillation splitting assembly is 0.2-1.0 times the length of the traction assembly.

[0012] Preferably, the length of the airflow oscillation splitting assembly is 20-25cm; the length of the traction assembly is 60-70cm; and the length of the airflow oscillation splitting assembly is 0.29-0.42 times the length of the traction assembly.

[0013] Preferably, the angle between the central axis of the traction air intake pipe and the vertical plane is controlled to be 15-45°.

[0014] Preferably, the angle between the central axis of the traction air intake pipe and the vertical plane is controlled to be 30-35°.

[0015] Preferably, the distance from the connection point between the traction component and the traction air inlet pipe to the top surface of the traction component is equal to 0.5-0.8 times the length of the traction component.

[0016] Preferably, the angle between the central axis of the return loop pipe connected to the bottom circumference of the main pipe and the vertical plane is controlled to be 75-85°.

[0017] Preferably, the angle between the central axis of the return loop pipe connected to the bottom circumference of the main pipe and the vertical plane is controlled at 75-78°.

[0018] Preferably, the angle between the central axis of the return ring tube connected to the circumferential direction of the main wire inlet end and the vertical plane is controlled to be 75-105°.

[0019] Preferably, the angle between the central axis of the return ring tube connected to the circumferential direction of the main wire inlet end and the vertical plane is controlled to be 85-100°.

[0020] Preferably, the angle between the central axis of the return ring tube connected to the circumferential direction of the main wire inlet end and the vertical plane is controlled to be 75-105°.

[0021] Preferably, the angle between the central axis of the return ring tube connected to the circumferential direction of the main wire inlet end and the vertical plane is controlled to be 88-92°.

[0022] Preferably, the diameter of the main tube's back-to-feed end is smaller than the diameter of the main tube's feed end; the diameter of the main tube's back-to-feed end is 0.5-0.95 times the diameter of the main tube's feed end; and the lower cross-section of the main tube's back-to-feed end is an isosceles trapezoid with an upper base larger than the lower base.

[0023] Preferably, the diameter of the main tube's back-to-feed end is smaller than the diameter of the main tube's feed end; the diameter of the main tube's back-to-feed end is 0.75-0.9 times the diameter of the main tube's feed end; and the lower cross-section of the main tube's back-to-feed end is an isosceles trapezoid with the upper base larger than the lower base.

[0024] By adopting the above technical solutions, airflow stretching and fiber splitting operations can be achieved relatively better.

[0025] Preferably, the diameter of the main tube facing away from the wire feeding end is smaller than the diameter of the main tube wire feeding end; the diameter of the main tube facing away from the wire feeding end is 0.5-0.95 times the diameter of the main tube wire feeding end; the lower cross-section of the main tube facing away from the wire feeding end is an irregular shape with the upper base larger than the lower base, the waistlines on both sides of the irregular shape are arcs, and the center of the arc is set away from the central axis of the main tube, that is, the inner bottom corner of the main tube is an arc surface.

[0026] Preferably, the diameter of the main tube facing away from the wire feeding end is smaller than the diameter of the main tube wire feeding end; the diameter of the main tube facing away from the wire feeding end is 0.8-0.85 times the diameter of the main tube wire feeding end; the lower cross-section of the main tube facing away from the wire feeding end is an irregular shape with the upper base larger than the lower base, the waistlines on both sides of the irregular shape are arcs, and the center of the arc is set away from the central axis of the main tube, that is, the inner bottom corner of the main tube is an arc surface.

[0027] By adopting the above technical solution, this application is endowed with the potential function of preparing crimped fibers.

[0028] In summary, this application has the following advantages:

[0029] 1. The present invention provides a multifunctional spunbond airflow drafter, which utilizes an airflow oscillator structure in the spunbond positive pressure airflow drafting process, and has the functions of airflow drafting, fiber splitting, and potential crimped fiber preparation.

[0030] 2. The multifunctional spunbond airflow stretcher provided by this invention can achieve efficient filament splitting without the need for an external filament splitting / spinning device, which can improve the overall production efficiency of spunbond nonwoven fabrics. At the same time, it can increase the width of the prepared spunbond nonwoven fabrics and reduce the overall production energy consumption, showing significant advantages in energy saving and environmental protection. Attached Figure Description

[0031] Figure 1 This is a flowchart of the spunbond process in existing technology.

[0032] Figure 2 This is a flow chart of the spunbond process using the present application.

[0033] Figure 3 This is a schematic diagram of the overall structure of Embodiment 1 in this application.

[0034] Figure 4 This is a schematic diagram of the overall structure of Embodiment 2 in this application.

[0035] In the diagram, 1 is the traction assembly; 2 is the airflow oscillation splitting assembly; 21 is the main pipe; 22 is the return loop pipe; 23 is the outlet guide pipe; and 3 is the traction air inlet pipe. Detailed Implementation

[0036] The present application will be further described in detail below with reference to the accompanying drawings and embodiments.

[0037] Example 1

[0038] Reference Figure 3This application discloses a multifunctional spunbond airflow drafter, comprising a traction component 1 and an airflow oscillation splitting component 2. The yarn outlet end of the traction component 1 is connected to the yarn inlet end of the airflow oscillation splitting component 2. Symmetrical traction air inlet pipes 3 are connected to both sides of the traction component 1. The angle between the central axis of the traction air inlet pipe 3 and the vertical plane is controlled to be 15-45°, preferably 30-45°. The distance from the connection point between the traction component 1 and the traction air inlet pipe 3 to the top surface of the traction component 1 is equal to 0.5-0.8 times the length of the traction component 1; preferably, the distance is equal to 0.7-0.8 times the length of the traction component 1.

[0039] Reference Figure 3 The airflow oscillation splitting assembly 2 includes a main pipe 21, a return loop pipe 22, and an outlet guide pipe 23. One end of the main pipe 21 is connected to the yarn outlet end of the traction assembly 1, and the other end of the main pipe 21 is connected to the outlet guide pipe 23. One end of the return loop pipe 22 is connected circumferentially to the yarn inlet end of the main pipe 21, and the other end of the return loop pipe 22 is connected circumferentially to the bottom of the main pipe 21. The angle between the central axis of the return loop pipe 22 connected to the bottom of the main pipe 21 and the vertical plane is controlled to be 70-85°, preferably 74-80°. The angle between the central axis of the return loop pipe 22 connected to the yarn inlet end of the main pipe 21 and the vertical plane is controlled to be 75-105°, preferably 88-92°.

[0040] Reference Figure 3 The length of the airflow oscillation splitting assembly 2 is 15-30cm, preferably 20-25cm. The length of the traction assembly 1 is 30-75cm, preferably 60-70cm. The length of the airflow oscillation splitting assembly 2 is 0.2-1.0 times the length of the traction assembly 1, preferably 0.29-0.42 times.

[0041] Reference Figure 3 The diameter of the wire feed end (wire outlet end) of the main pipe 21 is smaller than the diameter of the wire feed end of the main pipe 21, and the diameter of the wire feed end (wire outlet end) of the main pipe 21 is 0.5-0.95 times the diameter of the wire feed end of the main pipe 21, preferably 0.75-0.9 times. The lower cross section of the wire feed end of the main pipe 21 is an isosceles trapezoid with the upper base larger than the lower base.

[0042] The multifunctional spunbond airflow drafter in this embodiment can achieve airflow drafting and filament separation operations relatively better. This invention utilizes an airflow oscillator structure in the spunbond positive pressure airflow drafting process, providing airflow drafting and filament separation functions. It achieves efficient filament separation without the need for external filament separation / arranging devices, improving the overall production efficiency of spunbond nonwoven fabrics. Simultaneously, it can increase the width of the prepared spunbond nonwoven fabrics, reduce overall production energy consumption, and promote energy conservation and environmental protection. This provides a driving force for enterprise transformation, reduces necessary labor time in the industry, lowers overall production costs, and enhances social productivity.

[0043] Example 2

[0044] The difference between Example 2 and Example 1 is:

[0045] Reference Figure 4 The diameter of the main pipe 21 facing away from the wire inlet end is smaller than the diameter of the wire inlet end of the main pipe 21. The diameter of the main pipe 21 facing away from the wire inlet end is 0.75-0.9 times, preferably 0.8-0.85 times. The lower cross-section of the main pipe 21 facing away from the wire inlet end is an irregular shape with the upper base larger than the lower base. The waistlines on both sides of the irregular shape are arcs, and the center of the arcs is set away from the central axis of the main pipe 21, that is, the inner bottom corner of the main pipe 21 is an arc-shaped surface.

[0046] This invention provides a multifunctional spunbond airflow drafter that utilizes an airflow oscillator structure in the spunbond positive pressure airflow drafting process. It features airflow drafting and fiber splitting functions, and also has the potential to prepare crimped fibers. It achieves efficient fiber splitting without the need for external fiber splitting / arranging devices, thereby improving the overall production efficiency of spunbond nonwoven fabrics. Simultaneously, it can increase the width of the prepared spunbond nonwoven fabrics, reduce overall production energy consumption, and promote energy conservation and environmental protection. This provides a driving force for enterprise transformation, reduces necessary labor time in the industry, lowers overall production costs, and enhances social productivity.

[0047] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A multifunctional spunbond airflow stretcher, characterized in that: The assembly includes a traction component (1) and an airflow oscillation splitting component (2). The yarn outlet end of the traction component (1) is connected to the yarn inlet end of the airflow oscillation splitting component (2). Symmetrical traction air inlet pipes (3) are connected to both sides of the traction component (1). The angle between the central axis of the traction air inlet pipe (3) and the vertical plane is controlled to be 15-45°. The distance from the connection point of the traction component (1) and the traction air inlet pipe (3) to the top surface of the traction component (1) is equal to 0.5-0.8 times the length of the traction component (1). Component (2) includes a main pipe (21), a return ring pipe (22), and an outlet guide pipe (23). One end of the main pipe (21) is connected to the wire outlet end of the traction assembly (1), and the other end of the main pipe (21) is connected to the outlet guide pipe (23). One end of the return ring pipe (22) is connected to the wire inlet end of the main pipe (21) in the circumferential direction, and the other end of the return ring pipe (22) is connected to the bottom circumferential direction of the main pipe (21). The angle between the central axis of the return ring pipe (22) connected to the bottom circumferential direction of the main pipe (21) and the vertical plane is controlled to be 70-85°.

2. The multifunctional spunbond airflow stretcher according to claim 1, characterized in that: The length of the airflow oscillation splitting assembly (2) is 15-30cm; the length of the traction assembly (1) is 30-75cm; the length of the airflow oscillation splitting assembly (2) is 0.2-1.0 times the length of the traction assembly (1).

3. The multifunctional spunbond airflow stretcher according to claim 1, characterized in that: The angle between the central axis of the return ring pipe (22) connected to the bottom circumference of the main pipe (21) and the vertical plane is controlled to be 75-85°.

4. The multifunctional spunbond airflow stretcher according to claim 1, characterized in that: The angle between the central axis of the return ring pipe (22) connected to the wire inlet end of the main pipe (21) and the vertical plane is controlled to be 75-105°.

5. The multifunctional spunbond airflow stretcher according to claim 1, characterized in that: The diameter of the main tube (21) facing away from the wire feed end is smaller than the diameter of the wire feed end of the main tube (21); the diameter of the main tube (21) facing away from the wire feed end is 0.75-0.9 times the diameter of the wire feed end of the main tube (21); the lower cross section of the main tube (21) facing away from the wire feed end is an isosceles trapezoid with the upper base larger than the lower base.

6. The multifunctional spunbond airflow stretcher according to claim 1, characterized in that: The diameter of the main tube (21) facing away from the wire feed end is smaller than the diameter of the wire feed end of the main tube (21); the diameter of the main tube (21) facing away from the wire feed end is 0.8-0.85 times the diameter of the wire feed end of the main tube (21); the lower cross section of the main tube (21) facing away from the wire feed end is an irregular shape with the upper base larger than the lower base, the waist lines on both sides of the irregular shape are arcs, and the center of the arc is set away from the central axis of the main tube (21), that is, the inner bottom corner of the main tube (21) is an arc surface.

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