Non-dyeing flame-retardant spinning nozzle
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG HENGBAIHUA CHEM FIBER CO LTD
- Filing Date
- 2025-08-21
- Publication Date
- 2026-07-21
AI Technical Summary
Traditional flame-retardant spinning nozzles have separate injection channels for colorants and flame retardants, resulting in uneven dispersion. Their simple mixing structure lacks an efficient fluid mixing mechanism, which affects the performance of the spinning nozzles.
The device employs components such as an annular distributor, a control tube, a radial injector, a microchannel plate, and a distribution plate, combined with a metering pump to achieve precise quantitative injection, forming a laminar flow mixing state. The radial injector is easily disassembled and cleaned through a T-shaped groove and a limiting rod structure.
It achieves uniform mixing of colorant and flame retardant, improves spinning efficiency, simplifies the maintenance and cleaning process of the nozzle, and avoids the difficulty of overall disassembly in case of blockage or damage.
Smart Images
Figure CN224531129U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of chemical fiber spinning equipment, and in particular to a dye-free flame-retardant spinning nozzle. Background Technology
[0002] In the production of functional fibers, colorants and flame retardants typically need to be mixed with molten polymers before or during spinning to achieve the fiber's color expression and flame-retardant properties. However, most traditional flame-retardant spinning nozzles only have a single feed structure, and the addition of both agents usually relies on premixing or external mixing methods. This not only easily leads to unstable addition ratios and uneven dyeing, but also problems such as uneven distribution of flame retardants and unclear fiber functional stratification. Therefore, a dye-free flame-retardant spinning nozzle is needed.
[0003] The dye-free flame-retardant spinning nozzle is a key component in spinning equipment, mainly used in the production of flame-retardant fibers. Existing spinning nozzles are mainly used for viscose fiber spinning, but the colorant and flame retardant are injected into separate channels, resulting in uneven dispersion and unstable color. In addition, the mixing section in traditional nozzles is generally simple in structure and lacks an efficient fluid mixing mechanism, which affects the use of the spinning nozzle. Utility Model Content
[0004] To overcome the above shortcomings, this utility model provides a dye-free flame-retardant spinning nozzle, which aims to improve the problem of uneven dispersion and lack of efficient fluid mixing mechanism caused by the independent injection channels of colorant and flame retardant.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: a dye-free flame-retardant spinning nozzle, comprising a nozzle body, an annular distributor fixedly connected inside the nozzle body, a first material control tube disposed inside the annular distributor, the outer wall of the first material control tube disposed inside the nozzle body, a radial injector disposed inside the nozzle body, a second material control tube fixedly connected inside the radial injector, a precision valve disposed inside the second material control tube, a microchannel plate fixedly connected to the lower surface of the nozzle body, a serpentine channel formed inside the microchannel plate, a buffer chamber fixedly connected to the lower surface of the microchannel plate, a distribution plate fixedly connected to the inner wall of the buffer chamber, a spinneret fixedly connected to the lower surface of the buffer chamber, and a feeding assembly disposed on the upper surface of the nozzle body.
[0006] The above technical solution involves: a groove inside the nozzle body for the flow of the spinning melt; an annular distributor fixed inside the nozzle body, which also has grooves arranged in an equidistant ring; after connecting the control tube to the metering pump, the colorant, after being measured by the metering pump, is delivered to the inside of the annular distributor through the control tube, and then flows through the grooves to the surface of the spinning melt; a discharge port, shaped like an inverted L, is provided on the right outer wall of the radial injector, with the outlet end located at the center of the nozzle body and inside the nozzle body; below the annular distributor, the flame retardant enters the interior of the radial injector through the control tube and flows to the center of the spinning melt through the discharge port.
[0007] As a further description of the above technical solution: The feeding assembly includes a feeding pipe, the bottom end of which is fixedly connected to the upper surface of the nozzle body, and a sealing ring is provided inside the feeding pipe.
[0008] The above technical solution involves feeding the spinning melt into the nozzle body through the feed pipe. Before this, the top of the feed pipe needs to be connected to the feeding mechanism, and the sealing ring is used to increase the sealing between the feed pipe and the feeding mechanism.
[0009] As a further description of the above technical solution: The distribution plate has a groove inside, and the spinneret has a groove inside.
[0010] The above technical solution involves using grooves inside the distribution plate to convey materials, while the grooves inside the spinneret are used to form uniformly colored flame-retardant filaments.
[0011] As a further description of the above technical solution: The nozzle body has a T-shaped groove inside, and a limit rod is provided on the inner wall of the T-shaped groove.
[0012] The above technical solution uses the special shape of the T-shaped groove to limit the movement of the limiting rod.
[0013] As a further description of the above technical solution: A T-shaped rod is fixedly connected to the outer wall of the limiting rod, and the outer wall of the T-shaped rod is located inside the nozzle body.
[0014] The above technical solution involves fixing the limiting rod to the outer wall of the T-shaped rod, which facilitates the operation of the T-shaped rod and thus enables the transmission of the limiting rod.
[0015] As a further description of the above technical solution: The outer wall of the T-shaped rod is provided with a hollow cylinder, and the outer wall of the hollow cylinder is fixedly connected to the inside of the radial injector.
[0016] The above technical solution involves a hollow cylinder installed on the outer wall of the T-shaped rod, which is fixed inside the radial injector to support the movement of the T-shaped rod.
[0017] As a further description of the above technical solution: The hollow cylinder has a disc that slides inside, and the disc is fixedly connected to the outer wall of the T-shaped rod.
[0018] The above technical solution achieves the effect of fixing the disc by using a T-shaped rod, and transmits power to the disc when the T-shaped rod moves.
[0019] As a further description of the above technical solution: The outer wall of the T-shaped rod is provided with a spring, one end of which is fixedly connected to the outer wall of the disc, and the other end of which is fixedly connected to the inside of the hollow cylinder.
[0020] The above technical solution involves fixing the two ends of a spring to a disc and a hollow cylinder respectively, thereby limiting the movement of the disc by utilizing the spring's own elasticity.
[0021] This utility model has the following beneficial effects: 1. In this utility model, the precise quantitative injection of the two agents is achieved through the cooperation of the annular distributor, the first control tube, the radial injector, the second control tube, the precision valve, the microflow plate, the serpentine channel, the buffer chamber and the distribution plate, and the metering pump is used to avoid uneven dyeing. At the same time, the melt and the two agents form a laminar flow state in the narrow and tortuous flow channel, which improves the mixing efficiency.
[0022] 2. In this utility model, through the cooperation between the T-shaped groove, the limiting rod, the T-shaped rod, the hollow cylinder, the disc and the spring, the radial injector can be installed and disassembled simply by rotating the T-shaped rod. This simplifies the operation of the radial injector, facilitates cleaning and maintenance, prevents blockage from affecting the injection accuracy, and in case of damage or wear, there is no need to disassemble the entire nozzle; only the injector module needs to be replaced. Attached Figure Description
[0023] Figure 1 This is a perspective view of a dye-free flame-retardant spinning nozzle proposed in this utility model; Figure 2 This is a partial structural diagram of the annular distributor of a dye-free flame-retardant spinning nozzle proposed in this utility model. Figure 3 This is a partial structural diagram of the serpentine channel of a dye-free flame-retardant spinning nozzle proposed in this utility model; Figure 4 This is a cross-sectional schematic diagram of the internal structure of the hollow cylinder of a dye-free flame-retardant spinning nozzle proposed in this utility model.
[0024] Legend: 1. Nozzle body; 2. Annular distributor; 3. Feed control tube one; 4. Radial injector; 5. Feed control tube two; 6. Precision valve; 7. Feed assembly; 701. Feed tube; 702. Sealing ring; 8. Microflow channel plate; 9. Serpentine channel; 10. Buffer chamber; 11. Distribution plate; 12. Spinneret; 13. T-groove; 14. Limiting rod; 15. T-shaped rod; 16. Hollow cylinder; 17. Disc; 18. Spring. Detailed Implementation
[0025] 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.
[0026] Reference Figures 1-3 An embodiment of this utility model provides: a dye-free flame-retardant spinning nozzle, including a nozzle body 1, an annular distributor 2 fixedly connected inside the nozzle body 1, a control tube 3 inside the annular distributor 2, the outer wall of the control tube 3 being disposed inside the nozzle body 1, a radial injector 4 inside the nozzle body 1, a control tube 5 fixedly connected inside the radial injector 4, a precision valve 6 inside the control tube 5, a microchannel plate 8 fixedly connected to the lower surface of the nozzle body 1, a serpentine channel 9 opened inside the microchannel plate 8, a buffer chamber 10 fixedly connected to the lower surface of the microchannel plate 8, a distribution plate 11 fixedly connected to the inner wall of the buffer chamber 10, a spinneret 12 fixedly connected to the lower surface of the buffer chamber 10, and a feeding assembly 7 disposed on the upper surface of the nozzle body 1. Specifically, the metering pump is connected to the right side of the control tube 3, thus forming a whole with the annular distributor 2, the control tube 3, and the metering pump. This whole can be regarded as a colorant injection system, facilitating the injection of colorant. The flame retardant injection system is formed by the control tube 5, the precision valve 6, the radial injector 4, and the discharge port. This whole can be regarded as a flame retardant injection system, facilitating the injection of flame retardant. A microfluidic mixing structure is formed by the microchannel plate 8, the serpentine channel 9, the buffer chamber 10, and the distribution plate 11, and is based on the microfluidic laminar flow effect. To ensure uniform dispersion of the three-layer fluid and avoid separation caused by traditional turbulence, the serpentine channel 9 can be formed into a microchannel by laser etching or chemical etching, making the size of the serpentine channel 9 smaller, which facilitates the extension of the mixing path and improves diffusion efficiency. The distribution plate 11 is located at the bottom and slightly above the buffer chamber 10, leaving a certain space between the distribution plate 11 and the spinneret 12, which facilitates the flow distribution of the conical groove of the distribution plate 11. The spinneret 12 has a large number of spinnerets, so that a single conical groove of the distribution plate 11 is responsible for the spinnereting of multiple spinnerets.
[0027] Reference Figure 2 The feeding assembly 7 includes a feeding pipe 701, the bottom end of which is fixedly connected to the upper surface of the nozzle body 1, and a sealing ring 702 is provided inside the feeding pipe 701; the distribution plate 11 has a groove inside, and the spinneret 12 has a groove inside. Specifically, the feed pipe 701 is used to connect other equipment or feeding mechanisms, the internal groove of the distribution plate 11 is set to be conical, and the smaller opening is located on the lower side of the distribution plate 11 to facilitate material conveying, and the spinneret 12 has a groove inside for spinnereting.
[0028] Reference Figure 4 The nozzle body 1 has a T-shaped groove 13 inside, and a limit rod 14 is provided on the inner wall of the T-shaped groove 13. A T-shaped rod 15 is fixedly connected to the outer wall of the limit rod 14, and the outer wall of the T-shaped rod 15 is located inside the nozzle body 1. A hollow cylinder 16 is provided on the outer wall of the T-shaped rod 15, and the outer wall of the hollow cylinder 16 is fixedly connected to the inside of the radial injector 4. A disc 17 is slidably connected inside the hollow cylinder 16, and the inside of the disc 17 is fixedly connected to the outer wall of the T-shaped rod 15. A spring 18 is provided on the outer wall of the T-shaped rod 15, one end of the spring 18 is fixedly connected to the outer wall of the disc 17, and the other end of the spring 18 is fixedly connected to the inside of the hollow cylinder 16. Specifically, the special shape of the T-shaped groove 13 facilitates the vertical positioning of the limiting rod 14, thereby supporting and limiting the installation of the radial injector 4. The limiting rod 14 is limited as long as it is not in the lateral direction. The fixed hollow cylinder 16 supports and restricts the movement or sliding of the T-shaped rod 15. The outer wall of the T-shaped rod 15 and the inner wall of the hollow cylinder 16 support and restrict the movement of the disc 17. The elastic force of the spring 18 holds the T-shaped rod 15, providing support for the limiting rod 14 on the inner wall of the T-shaped groove 13. By providing hollow cylinders 16 on both the front and rear sides of the radial injector 4, the stability of the radial injector 4 after installation is maintained.
[0029] Working principle: When using this nozzle, the feed pipe 701 is connected to the feeding mechanism to transport the spinning melt into the interior of the nozzle body 1. The colorant is transported to the interior of the annular distributor 2 through the control pipe 3 and the metering pump. Then, through the groove inside the annular distributor 2, the colorant flows to the surface of the spinning melt. Then, the flame retardant is controlled by the precision valve 6 and enters the interior of the radial injector 4, so that the flame retardant flows to the center of the spinning melt. Thus, the mixed fluid enters the interior of the microchannel plate 8 through the interior of the nozzle body 1. Under the action of the serpentine channel 9, it undergoes laminar mixing. Then, through the groove opened in the serpentine channel 9, it enters the interior of the buffer chamber 10 for pressure equalization. The liquid is distributed to the spinneret 12 through the groove inside the distribution plate 11. Finally, it forms a uniformly colored flame retardant filament through the groove inside the spinneret 12. By rotating the T-shaped rod 15, the disc 17 and the limiting rod 14 rotate, causing the spring 18 to deform. After the limiting rod 14 rotates from the vertical direction to the horizontal direction, the elastic force of the spring 18 holds the T-shaped rod 15, causing the disc 17 to move to the left inside the hollow cylinder 16. This causes the limiting rod 14 to move to the left, allowing it to slide smoothly out of the inner wall of the T-shaped groove 13. Consequently, the radial injector 4 slides out of the nozzle body 1, allowing the radial injector 4 to be disassembled. During use, this nozzle not only avoids dyeing contamination of the spinning melt but also enables the installation and disassembly of the radial injector 4, facilitating cleaning and maintenance of the radial injector 4.
[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A dye-free flame-retardant spinning nozzle, comprising a nozzle body (1), characterized in that: An annular distributor (2) is fixedly connected inside the nozzle body (1). A control tube (3) is provided inside the annular distributor (2). The outer wall of the control tube (3) is located inside the nozzle body (1). A radial injector (4) is provided inside the nozzle body (1). A control tube (5) is fixedly connected inside the radial injector (4). A precision valve (6) is provided inside the control tube (5). A microchannel plate (8) is fixedly connected to the lower surface of the nozzle body (1). A serpentine channel (9) is opened inside the microchannel plate (8). A buffer chamber (10) is fixedly connected to the lower surface of the microchannel plate (8). A distribution plate (11) is fixedly connected to the inner wall of the buffer chamber (10). A spinneret (12) is fixedly connected to the lower surface of the buffer chamber (10). A feeding assembly (7) is provided on the upper surface of the nozzle body (1).
2. The dye-free flame-retardant spinning nozzle according to claim 1, characterized in that: The feeding assembly (7) includes a feeding pipe (701), the bottom end of which is fixedly connected to the upper surface of the nozzle body (1), and a sealing ring (702) is provided inside the feeding pipe (701).
3. The dye-free flame-retardant spinning nozzle according to claim 1, characterized in that: The distribution plate (11) has a groove inside, and the spinneret plate (12) has a groove inside.
4. The dye-free flame-retardant spinning nozzle according to claim 1, characterized in that: The nozzle body (1) has a T-shaped groove (13) inside, and a limit rod (14) is provided on the inner wall of the T-shaped groove (13).
5. The dye-free flame-retardant spinning nozzle according to claim 4, characterized in that: The outer wall of the limiting rod (14) is fixedly connected to a T-shaped rod (15), and the outer wall of the T-shaped rod (15) is located inside the nozzle body (1).
6. The dye-free flame-retardant spinning nozzle according to claim 5, characterized in that: The outer wall of the T-shaped rod (15) is provided with a hollow cylinder (16), and the outer wall of the hollow cylinder (16) is fixedly connected to the inside of the radial injector (4).
7. The dye-free flame-retardant spinning nozzle according to claim 6, characterized in that: The hollow cylinder (16) has a disc (17) slidably connected inside, and the disc (17) is fixedly connected to the outer wall of the T-shaped rod (15).
8. The dye-free flame-retardant spinning nozzle according to claim 5, characterized in that: The outer wall of the T-shaped rod (15) is provided with a spring (18), one end of the spring (18) is fixedly connected to the outer wall of the disc (17), and the other end of the spring (18) is fixedly connected to the inside of the hollow cylinder (16).