Solution spraying spinning nozzle capable of being inserted with heating rod
By introducing heating rods and thermocouple sensors into the spinneret and combining them with airflow control components, precise regulation of spinneret temperature and airflow pressure is achieved, solving the problems of low temperature control accuracy and slow response speed of existing spinnerets, and improving fiber forming quality and production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGHUA UNIV
- Filing Date
- 2025-07-04
- Publication Date
- 2026-05-19
AI Technical Summary
Existing spinnerets suffer from low temperature control accuracy and slow response speed, resulting in poor fiber crystallization or unstable morphology. Furthermore, they lack a real-time feedback adjustment mechanism, making it difficult to cope with environmental changes.
The system employs a meltblown spinning nozzle into which a heating rod can be inserted, combined with a thermocouple sensor to detect the nozzle temperature in real time and maintain the temperature within a set range via the heating rod. At the same time, the airflow control component dynamically adjusts the airflow pressure to achieve precise control of the spinning process.
It achieves precise control of spinneret temperature and dynamic adjustment of airflow pressure, improving fiber forming quality and production efficiency, and solving the problems of temperature control accuracy and response speed.
Smart Images
Figure CN224258857U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of spinning equipment technology, specifically to a meltblown spinning nozzle into which a heating rod can be inserted. Background Technology
[0002] The spinneret is one of the core components of spinning equipment, widely used in the production processes of chemical fibers, nanofibers, nonwoven fabrics, and biomaterials. This device typically consists of a spinning kettle, a spinneret, a heating system, and a pressure control system. Its basic working principle is that external pressure or airflow forces a polymer solution or melt to flow within the spinning kettle and be continuously extruded through micropores on the spinneret to form nascent fibers. Subsequently, these nascent fibers cool, solidify, or have the solvent evaporate to form finished fibers. The performance of the spinneret directly affects key quality indicators such as fiber diameter, uniformity, strength, and surface morphology.
[0003] Currently, most common spinning devices employ a fixed spinneret structure, operated with simple pressure regulating valves and temperature control modules. These devices are relatively mature in conventional chemical fiber production and can meet certain process requirements. However, with the development of new materials (such as nanomaterials, biodegradable polymers, and composite fibers), the requirements for the precision, controllability, and adaptability of the spinning process are increasingly stringent. Therefore, in modern spinning processes, achieving precise adjustment of parameters such as spinneret flow rate and temperature distribution has become an important research direction for improving fiber quality and production efficiency.
[0004] Existing spinnerets still have many technical shortcomings in practical applications. In terms of temperature control, existing systems generally suffer from low temperature control accuracy and slow response speed, which can easily lead to quality defects such as poor fiber crystallization or unstable morphology. Furthermore, they lack an effective real-time feedback adjustment mechanism, making it difficult to cope with the impact of environmental changes on the spinning process.
[0005] To address the aforementioned issues, a meltblown spinning nozzle that can be inserted with a heating rod is proposed. Utility Model Content
[0006] The purpose of this invention is to provide a meltblown spinning nozzle into which a heating rod can be inserted, which solves the problems of low temperature control accuracy and slow response speed in existing systems in the background art, which easily lead to quality defects such as poor fiber crystallization or unstable morphology, and lack of an effective real-time feedback adjustment mechanism.
[0007] To achieve the above objectives, this utility model provides the following technical solution: a meltblown spinning nozzle into which a heating rod can be inserted, comprising a spinneret, a spinneret fixedly connected to the bottom of the spinneret, a solution channel opened at the top of the spinneret and inside the spinneret, a uniformly distributed spinneret orifice through the bottom of the spinneret, an airflow conveying block provided in each spinneret, a connecting cylinder fixedly connected to the front end of each of the two airflow conveying blocks, an airflow slot opened on the adjacent side of each of the two airflow conveying blocks, an airflow control component connected inside each of the two connecting cylinders, a first mounting component provided at the front end of the spinneret, a second mounting component provided at the rear end of the spinneret, a through groove opened through the first mounting component and the second mounting component, a heating rod fixedly connected in each of the two through grooves, a second screw through the upper and lower parts of the first mounting component, two third screws through the upper and lower parts of the second mounting component, and a thermocouple sensor fixedly connected to the front of the spinneret.
[0008] By adopting the above technical solution, the entire spinneret can be heated by the heating rod, and the internal temperature of the spinneret can be detected in real time by the thermocouple sensor and the signal can be transmitted to the external temperature control system, thereby maintaining the spinneret temperature within the set range.
[0009] As a further description of the above technical solution: the airflow control component includes a delivery pipe, which is fixedly connected to the inner part of the connecting cylinder. A pressure gauge is provided outside the delivery pipe, and a pressure regulating valve is provided at the front end of the pressure gauge, and the pressure regulating valve is fixedly connected to the delivery pipe.
[0010] By adopting the above technical solution, the pressure gauge of the airflow control component displays the air pressure in the delivery pipe in real time, and in conjunction with the pressure regulating valve, the airflow pressure can be dynamically adjusted according to the requirements of the spinning process.
[0011] As a further description of the above technical solution: a connecting seat is fixedly connected to the top of the spinneret, and the connecting seat corresponds to the solution channel.
[0012] By adopting the above technical solution, the connecting seat has an internal thread structure, which is used to cooperate with the external thread at the lower end of the spinning kettle to achieve a detachable connection, which facilitates installation, disassembly and subsequent cleaning and maintenance.
[0013] As a further description of the above technical solution: the spinneret is connected to the solution channel.
[0014] By adopting the above technical solution, it is convenient for the polymer solution in the solution channel to enter the spinneret and be ejected.
[0015] As a further description of the above technical solution: multiple first screws are provided through both sides of the top of the spinneret, and the bottom of the first screws is threadedly connected to the top of the airflow conveying block.
[0016] By adopting the above technical solution, the spinneret and the two airflow conveying blocks can be fixedly installed using the first screw.
[0017] As a further description of the above technical solution: the end of the upper second screw is threadedly connected to the front end of the spinneret, and the end of the lower second screw is threadedly connected to the front end of the spinneret.
[0018] By adopting the above technical solution, the first mounting component can be fixedly installed with the spinneret and the spinneret head using the second screw.
[0019] As a further description of the above technical solution: the end of the third screw mentioned above is threadedly connected to the rear end of the spinneret, and the end of the third screw mentioned below is threadedly connected to the rear end of the airflow conveying block.
[0020] By adopting the above technical solution, the second mounting component can be fixedly installed with the spinneret and the spinneret head using the third screw.
[0021] As a further description of the above technical solution: both of the airflow conveying blocks have airflow channels running through them.
[0022] By adopting the above technical solution, the air inlet of the airflow channel is located at the front end of the airflow conveying block and corresponds to the connecting cylinder, while the air outlet is located on the inward side of the airflow conveying block.
[0023] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0024] This utility model provides a meltblown spinning nozzle into which a heating rod can be inserted. First, the first mounting part, the second mounting part, the through groove, the heating rod, and the thermocouple sensor work together. The heating rod can heat the entire nozzle, and the thermocouple sensor can detect the internal temperature of the nozzle in real time and transmit the signal to the external temperature control system to maintain the nozzle temperature within the set range.
[0025] This invention provides a meltblown spinning nozzle with an insertable heating rod. The nozzle utilizes a coordinated system of an airflow delivery block, connecting cylinder, airflow channel, airflow slot, delivery pipe, pressure regulating valve, and pressure gauge. Opposing airflow fields are formed through the airflow slots on both sides of the nozzle, stretching and cooling the fine stream of solution extruded from the nozzle, thus promoting filament formation. The pressure gauge, integrated with the airflow control component, displays the real-time air pressure within the delivery pipe, and the pressure regulating valve allows for dynamic adjustment of the airflow pressure according to the spinning process requirements. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0027] Figure 2This is a cross-sectional view of the spinneret of this utility model;
[0028] Figure 3 This is an exploded view of the overall structure of this utility model;
[0029] Figure 4 This is a cross-sectional view of the airflow conveying block of this utility model.
[0030] In the diagram: 1. Spinneret; 2. Connecting seat; 3. Spinneret head; 4. Spinneret nozzle; 5. Airflow conveying block; 6. Connecting cylinder; 7. Airflow channel; 8. Airflow slot; 9. First screw; 10. Conveying pipe; 11. Pressure regulating valve; 12. Pressure gauge; 13. First mounting component; 14. Through slot; 15. Heating rod; 16. Second mounting component; 17. Second screw; 18. Third screw; 19. Solution channel; 20. Thermocouple sensor. Detailed Implementation
[0031] 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.
[0032] To further understand the contents of this utility model, a detailed description of this utility model will be provided with reference to the accompanying drawings.
[0033] Reference Figure 1-4This utility model discloses a meltblown spinning nozzle with an insertable heating rod, comprising a spinneret 1, with a spinneret 3 fixedly connected to the bottom of the spinneret 1. The spinneret 3 is triangular prism-shaped. Solution channels 19 are provided at the top of the spinneret 3 and inside the spinneret 1 for easy collection of polymer solution. Uniformly distributed spinneret orifices 4 are provided through the bottom of the spinneret 3 for spinning. Each spinneret 3 is equipped with an airflow conveying block 5, which is trapezoidal and its inner side fits into the spinneret 3. Connecting cylinders 6 are fixedly connected to the front ends of both airflow conveying blocks 5 for easy connection to an external conveying pipe 10. Airflow slots 8 are provided on adjacent sides of both airflow conveying blocks 5 for easy airflow discharge. Both connecting cylinders 6 are connected to airflow control components. A first mounting component 13 is located at the front end of the spinneret 1, and a second mounting component 16 is located at the rear end. Both the first and second mounting components 13 and 16 have through-slots 14, through which heating rods 15 can be fixedly installed. Heating rods 15 are fixedly connected to both through-slots 14, facilitating heating of the spinneret head 3 and the spinneret 1. Second screws 17 are installed through the top and bottom of the first mounting component 13, and two third screws 18 are fixedly connected through the top and bottom of the second mounting component 16. A thermocouple sensor 20 is fixedly connected to the front of the spinneret head 3, and the thermocouple sensor 20 monitors the internal temperature of the spinneret head 3 in real time.
[0034] Reference Figure 1 The airflow control component includes a delivery pipe 10, which is fixedly connected to the connecting cylinder 6. A pressure gauge 12 is installed outside the delivery pipe 10, and a pressure regulating valve 11 is installed at the front end of the pressure gauge 12. The pressure regulating valve 11 is fixedly connected to the delivery pipe 10. The pressure gauge 12 of the airflow control component displays the air pressure inside the delivery pipe 10 in real time. In conjunction with the pressure regulating valve 11, the airflow pressure can be dynamically adjusted according to the requirements of the spinning process.
[0035] Reference Figure 1-4A connecting seat 2 is fixedly connected to the top of the spinneret 1, and the connecting seat 2 corresponds to the solution channel 19. The connecting seat 2 has an internal thread structure, which is used to cooperate with the external thread at the lower end of the spinning kettle to achieve a detachable connection, which is convenient for installation, disassembly and subsequent cleaning and maintenance. The spinneret 4 communicates with the solution channel 19, which facilitates the entry and exit of the polymer solution in the solution channel 19 into the spinneret 4. Multiple first screws 9 are provided through both sides of the top of the spinneret 1, and the bottom of the first screw 9 is threaded to the top of the air conveying block 5. The end of the upper second screw 17 is threaded to the front end of the spinneret 1. The first screws 9 can be used to fix the spinneret 1 to the two air conveying blocks 5. The end of the lower second screw 17 is threaded to the front end of the spinneret 3. The second screw 17 can be used to fix the first mounting part 13 to the spinneret 1 and the spinneret 3. The end of the upper third screw 18 is threaded to the rear end of the spinneret 1. The third screw 18 can be used to fix the second mounting part 16 to the spinneret 1 and the spinneret 3. The end of the third screw 18 below is threaded to the rear end of the airflow conveying block 5. Both airflow conveying blocks 5 have airflow channels 7 that pass through them. The air inlet of the airflow channel 7 is located at the front end of the airflow conveying block 5 and corresponds to the connecting cylinder 6. The air outlet is located on the inward side of the airflow conveying block 5.
[0036] Working principle: During operation, the spinneret 1 is connected to the solution channel 19 inside the spinneret 3. The top is connected to the spinning kettle (not shown in the figure) containing the polymer solution via the connecting seat 2. Under pressure, the solution enters the solution channel 19 from the connecting seat 2 and is evenly distributed to each spinneret 4. The spinneret 4 consists of five micropores evenly arranged in a straight line, with a diameter of 0.3 mm for each micropore. This arrangement helps to ensure the uniform distribution of melt flow during spinning, ensuring that the solution can be extruded at a consistent flow rate to form a uniform fiber bundle. Two heating rods 15 are fixed at the front end of the spinneret 1 via the first mounting component 13 and at the rear end via the second mounting component 16. The heating rods 15 pass through the through groove 14 to heat the spinneret 3 and the spinneret 1 as a whole. Thermocouple sensor 20 detects the internal temperature of the spinneret 3 in real time and transmits the signal to the external temperature control system (not shown in the figure). The temperature control system adjusts the power of the heating rods 15 according to the thermocouple feedback value to maintain the temperature of the spinneret 3 within the set range (the optimal spinning temperature range of the polymer). The airflow conveying blocks 5 on the left and right sides are connected to the external air source through the conveying pipe 10. The airflow passes through the conveying pipe 10, the connecting cylinder 6, and the airflow channel 7 and finally enters the airflow slot 8. The pressure gauge 12 displays the air pressure in the conveying pipe 10 in real time. The pressure regulating valve 11 dynamically adjusts the airflow pressure according to the spinning process requirements. The airflow slots 8 on both sides form opposing airflow fields to stretch and cool the solution streams squeezed out from the spinneret 4, promote filament formation, and cooperate with the receiving roller (not shown in the figure) set below the nozzle to wind and collect the spun fibers.
[0037] 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.
[0038] 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 meltblown spinning nozzle into which a heating rod can be inserted, comprising a spinneret (1), characterized in that: The bottom of the spinneret (1) is fixedly connected to a spinneret head (3). A solution channel (19) is provided at the top of the spinneret head (3) and inside the spinneret plate (1). The bottom of the spinneret head (3) has evenly distributed spinneret nozzles (4). Each spinneret head (3) is equipped with an airflow conveying block (5). A connecting cylinder (6) is fixedly connected to the front end of each of the two airflow conveying blocks (5). An airflow slot (8) is provided on the adjacent side of each of the two airflow conveying blocks (5). An airflow control component is connected inside each of the two connecting cylinders (6). The front end of the spinneret plate (1)... A first mounting component (13) is provided, and a second mounting component (16) is provided at the rear end of the spinneret (1). Both the first mounting component (13) and the second mounting component (16) have through slots (14) that are opened through them. A heating rod (15) is fixedly connected in both slots (14). A second screw (17) is provided through the upper and lower parts of the first mounting component (13). Two third screws (18) are fixedly connected through the upper and lower parts of the second mounting component (16). A thermocouple sensor (20) is fixedly connected in front of the spinneret (3).
2. The meltblown spinning nozzle with an insertable heating rod according to claim 1, characterized in that: The airflow control component includes a delivery pipe (10), which is fixedly connected to the inner part of the connecting cylinder (6). A pressure gauge (12) is provided outside the delivery pipe (10), and a pressure regulating valve (11) is provided at the front end of the pressure gauge (12), and the pressure regulating valve (11) is fixedly connected to the delivery pipe (10).
3. The meltblown spinning nozzle with an insertable heating rod according to claim 1, characterized in that: The top of the spinneret (1) is fixedly connected to a connecting seat (2), and the connecting seat (2) corresponds to the solution channel (19).
4. A meltblown spinning nozzle with an insertable heating rod according to claim 1, characterized in that: The spinneret (4) is connected to the solution channel (19).
5. A meltblown spinning nozzle with an insertable heating rod according to claim 1, characterized in that: The top two sides of the spinneret (1) are each provided with a number of first screws (9), and the bottom of the first screws (9) is threadedly connected to the top of the airflow conveying block (5).
6. A meltblown spinning nozzle with an insertable heating rod according to claim 1, characterized in that: The end of the upper second screw (17) is threaded to the front end of the spinneret (1), and the end of the lower second screw (17) is threaded to the front end of the spinneret (3).
7. A meltblown spinning nozzle with an insertable heating rod according to claim 1, characterized in that: The end of the third screw (18) above is threaded to the rear end of the spinneret (1), and the end of the third screw (18) below is threaded to the rear end of the airflow conveying block (5).
8. A meltblown spinning nozzle with an insertable heating rod according to claim 1, characterized in that: Both airflow conveying blocks (5) have airflow channels (7) that run through them.