Polypropylene high-tenacity yarn spinning assembly
By installing an air curtain sleeve on the outer wall of the spinning assembly shell and using hot air to form an air curtain, the problem of uneven spinneret temperature caused by heat exchange outside the shell is solved, and the stability of the spinneret temperature and the improvement of fiber uniformity are achieved.
Patent Information
- Application Number
- CN202422705640.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-07
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-11-07
AI Technical Summary
During the spinning process, the chimney effect is formed due to the heat exchange between the outside of the shell and the outside air, resulting in uneven temperature of the spinneret, which affects the uniformity of the fiber and the spinning quality.
An air curtain sleeve is installed on the outer wall of the shell of the spinning assembly. Hot air is introduced through the hot air duct to form a hot air curtain above the spinneret, blocking the direct heat exchange between the outer wall of the shell and the outside air. The wind speed is adjusted by using a spiral baffle and an adjustment structure to keep the spinneret temperature stable.
It effectively reduces the heat exchange between the spinneret and the outside world, keeps the spinneret temperature stable, and improves the uniformity and spinning quality of the fiber.
Smart Images
Figure CN223373313U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of spinning accessories, in particular to a polypropylene high-strength yarn spinning component. Background Art
[0002] During the spinning process, the spinning assembly, as an important component of the spinning machine, is mainly used to finely filter the melt delivered by the metering pump. The melt first enters the feed cup from the melt inlet, and then under a certain pressure, the melt is extruded through the micropores on the spinneret to form a uniform filament bundle.
[0003] The spinning assembly transfers temperature outwards through the outer wall of the shell, exchanging heat with the air outside the spinning assembly. Since hot air rises and cold air falls, strong convection is formed on the outside of the shell of the spinning assembly, forming a chimney effect. The heat exchange with the outside air will make the temperature of the edge of the internal spinneret lower than the temperature in the middle, thereby reducing the uniformity of the fiber and affecting the quality of spinning. Utility Model Content
[0004] (1) Technical problems solved
[0005] In view of the deficiencies in the prior art, the present invention provides a polypropylene high-strength yarn spinning assembly, which solves the problems raised in the above-mentioned background technology.
[0006] (2) Technical solution
[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:
[0008] A polypropylene high-strength yarn spinning assembly comprises a shell, in which a joint, a positioning nut, a diffuser plate, a filter mechanism, a guide plate and a spinneret are installed from top to bottom. The characteristic is that an air curtain sleeve is sleeved on the outer wall of the shell, the interior of the air curtain sleeve is configured as a hollow cavity, the upper end of the outer wall of the air curtain sleeve is connected to a hot air duct, an installation groove is provided on the lower side of the air curtain sleeve, an air curtain nozzle is installed in the installation groove, and the height of the air curtain nozzle is set above the spinneret.
[0009] Preferably, a spiral baffle is provided on one side of the hollow cavity close to the shell.
[0010] Preferably, the air curtain nozzle includes a positioning ring and a pressure regulating ring with symmetrical cross-sections, and the positioning ring and the pressure regulating ring include a mounting portion, an extension portion, an acceleration portion and a nozzle portion from top to bottom. The mounting portion extends horizontally and is fixed on the bottom wall of the air curtain sleeve, and the extension portion is vertically fitted downward on the side wall of the mounting groove. The acceleration portion is configured as an inclined surface, and the spacing between the inclined portions of the positioning ring and the pressure regulating ring gradually decreases to form a trumpet-shaped airflow channel, and the nozzle portion extends vertically downward from the lower edge of the acceleration portion.
[0011] Preferably, a through groove is provided on the pressure regulating ring from the acceleration part downwards, a guide screw is provided at the lower end of the air curtain sleeve, a contact table is installed on the guide screw, and the contact table contacts the outer wall of the acceleration part of the pressure regulating ring.
[0012] Preferably, a threaded hole is provided in the middle of the interference cone, and the interference cone is threadedly connected to the guide screw.
[0013] Preferably, an inclined truncated cone is provided above the outer wall of the abutting truncated cone, a gear plate is provided below the abutting truncated cone, and the inclined truncated cone abuts against the outer wall of the acceleration portion of the pressure regulating ring.
[0014] Preferably, an adjusting sleeve is rotatably connected to the lower side of the air curtain sleeve, a gear ring is fixed to the inner wall of the adjusting sleeve, and the gear ring is engaged with the gear plate of the abutting circular table.
[0015] Preferably, the height of the gear ring is greater than the thickness of the gear plate.
[0016] (3) Beneficial effects
[0017] The utility model provides a polypropylene high-strength yarn spinning assembly, which has the following beneficial effects:
[0018] 1. In the utility model, hot air is introduced into the hot air duct, and the hot air moves downward from the hollow cavity of the air curtain sleeve and is accelerated to be ejected from the air jet gap formed between the positioning ring and the pressure regulating ring, forming a hot air curtain on the outside of the shell and above the spinneret, blocking the "chimney effect" caused by direct contact between the outer wall of the shell corresponding to the position of the spinneret and the outside air, reducing the heat exchange between the spinneret and the outside, and keeping the temperature of the spinneret stable.
[0019] 2. In the present invention, during the downward movement of hot air, sufficient heat is exchanged with the spiral baffle, so that the temperature difference between the hot air in the air curtain sleeve and the inner wall of the shell is minimized before it is ejected from the air curtain nozzle, thereby reducing the heat exchange between the air curtain and the spinneret corresponding to the shell. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 This is a structural diagram of a polypropylene high-strength yarn spinning assembly of the utility model;
[0021] Figure 2 for Figure 1 A partial enlarged view of point A in the middle.
[0022] In the figure: 1. Shell; 2. Joint; 3. Positioning nut; 4. Diffuser plate; 5. Spinneret; 6. Air curtain sleeve; 7. Connecting flange; 8. Spiral baffle; 9. Positioning ring; 10. Pressure regulating ring; 101. Mounting part; 102. Extension part; 103. Acceleration part; 104. Nozzle part; 11. Guide screw; 12. Interference table; 121. Inclined table; 122. Gear plate; 13. Adjusting sleeve; 14. Gear ring; 15. Hot air duct. DETAILED DESCRIPTION
[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.
[0024] like Figure 1 As shown, the embodiment of the present invention provides a polypropylene high-strength yarn spinning assembly, including a shell 1, in which a joint 2, a positioning nut 3, a diffuser plate 4, a filter mechanism, a guide plate and a spinneret 5 are installed from top to bottom. The positioning nut 3 is threadedly connected to the top of the shell 1, and an air curtain sleeve 6 is sleeved on the outer wall of the shell 1. The upper end of the air curtain sleeve 6 is bent inward to form a connecting flange 7, and the connecting flange 7 is clamped between the positioning nut 3 and the upper end of the shell 1. The positioning nut 3 and the air curtain sleeve 6 are internally provided with a hollow cavity, and a spiral stop is provided on the side of the hollow cavity close to the shell 1. Plate 8, the spiral baffle 8 can make the hot air in the hollow cavity exchange heat with the shell 1, so that the temperature difference between the hot air before it is ejected from the air curtain nozzle and the inside of the shell 1 is minimized, and heat exchange between the air curtain after ejection and the shell 1 can be avoided, thereby ensuring the temperature of the spinneret 5 in the shell 1 to be stable. In addition, the hollow cavity can also play a role of heat insulation, reducing the heat exchange between the shell 1 and the outside world. The upper end of the outer wall of the air curtain sleeve 6 is connected to the hot air duct 15, and the lower side of the air curtain sleeve 6 is provided with a mounting groove, and the air curtain nozzle is installed in the mounting groove. The height of the air curtain nozzle is set above the spinneret 5.
[0025] like Figure 2As shown, the air curtain nozzle includes a positioning ring 9 and a pressure regulating ring 10 with symmetrical cross-sections. The positioning ring 9 and the pressure regulating ring 10 include a mounting portion 101, an extension portion 102, an acceleration portion 103 and a nozzle portion 104 from top to bottom. The mounting portion 101 extends horizontally and is fixed on the bottom wall of the air curtain sleeve 6. The extension portion 102 is vertically downwardly attached to the side wall of the mounting groove. The acceleration portion 103 is set as an inclined surface. The spacing between the inclined portions of the positioning ring 9 and the pressure regulating ring 10 gradually decreases to form a trumpet-shaped air flow channel. The gradually decreasing spacing between the inclined portions can accelerate the air inside. The nozzle portion 104 extends vertically downward from the lower edge of the acceleration portion 103. The accelerated hot air is accelerated and ejected from the nozzle portion 104 to form a hot air air curtain cover arranged on the outside of the shell 1. On the one hand, the hot air air curtain can block the strong convection heat exchange formed between the spinneret 5 and the outside air. At the same time, the small temperature difference between the hot air and the spinneret 5 can avoid heat exchange between the spinneret 5 and the outside, thereby ensuring the temperature stability of the spinneret 5.
[0026] It is further configured that a through groove is opened on the pressure regulating ring 10 from the acceleration part 103 downward, and a plurality of guide screws 11 are provided at the lower end of the air curtain sleeve 6. A contact cone 12 is installed on the guide screw 11, and the contact cone 12 contacts the outer wall of the acceleration part 103 of the pressure regulating ring.
[0027] It is further configured that a threaded hole is provided in the middle of the interference table 12, the interference table 12 is threadedly connected and sleeved on the guide screw 11, the upper part of the outer wall of the interference table 12 is provided with an inclined table 121, and the lower part of the interference table 12 is provided with a gear plate 122, the inclined table 121 is in contact with the outer wall of the acceleration part 103 of the pressure regulating ring, the adjusting sleeve 13 is rotatably connected below the air curtain sleeve 6, a rotating groove is provided below the outer wall of the air curtain sleeve 6, a rotating ring is provided inwardly at the upper end of the adjusting sleeve 13, and the rotating ring is slidably connected in the rotating groove, and a gear ring 14 is fixed to the inner wall of the adjusting sleeve 13, the gear ring 14 is engaged with the gear plate 122 of the interference table 12, and the height of the gear ring 14 is greater than the thickness of the gear plate 122.
[0028] Through the above technical solution, by rotating the adjusting sleeve 13, the gear ring 14 can be engaged to drive the gear plate 122 below the interference table 12 to rotate on the guide screw 11, so that the upper and lower heights of the interference table 12 can be adjusted through threaded cooperation. The interference table 12 interferes with the part of the pressure regulating ring 10 between the two through grooves, and the through grooves provide displacement space so that the acceleration part 103 and the nozzle part 104 of the pressure regulating ring 10 are contracted inwardly, so that the distance between the pressure regulating ring 10 and the nozzle part 104 on the positioning ring 9 can be adjusted, and the ventilation area can be changed to adjust the wind speed, so that a wind curtain cover is formed on the outside of the spinneret 5.
[0029] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A polypropylene high-strength yarn spinning assembly, comprising a housing, in which a joint, a positioning nut, a diffuser, a filter mechanism, a guide plate, and a spinneret are installed from top to bottom, characterized in that: An air curtain sleeve is sleeved on the outer wall of the shell, the interior of the air curtain sleeve is set as a hollow cavity, the upper end of the outer wall of the air curtain sleeve is connected to a hot air duct, and an installation groove is opened on the lower side of the air curtain sleeve, and an air curtain nozzle is installed in the installation groove. The height of the air curtain nozzle is set above the spinneret.
2. The polypropylene high-strength yarn spinning assembly according to claim 1, characterized in that: A spiral baffle is provided on one side of the hollow cavity close to the shell.
3. The polypropylene high-strength yarn spinning assembly according to claim 2, characterized in that: The air curtain nozzle includes a positioning ring and a pressure regulating ring with symmetrical cross-sections. The positioning ring and the pressure regulating ring include a mounting portion, an extension portion, an acceleration portion and a nozzle portion from top to bottom. The mounting portion extends horizontally and is fixed on the bottom wall of the air curtain sleeve. The extension portion is vertically fitted downward on the side wall of the mounting groove. The acceleration portion is configured as an inclined surface. The spacing between the inclined portions of the positioning ring and the pressure regulating ring gradually decreases to form a trumpet-shaped airflow channel. The nozzle portion extends vertically downward from the lower edge of the acceleration portion.
4. The polypropylene high-strength yarn spinning assembly according to claim 3, characterized in that: A through groove is provided on the pressure regulating ring from the acceleration part downwards, a guide screw is provided at the lower end of the air curtain sleeve, and a contact round table is installed on the guide screw, and the contact round table contacts the outer wall of the acceleration part of the pressure regulating ring.
5. The polypropylene high-strength yarn spinning assembly according to claim 4, characterized in that: A threaded hole is provided in the middle of the abutting truncated cone, and the abutting truncated cone is threadedly sleeved on the guide screw.
6. The polypropylene high-strength yarn spinning assembly according to claim 5, characterized in that: An inclined truncated cone is provided above the outer wall of the abutting truncated cone, and a gear plate is provided below the abutting truncated cone. The inclined truncated cone abuts against the outer wall of the acceleration portion of the pressure regulating ring.
7. The polypropylene high-strength yarn spinning assembly according to claim 6, characterized in that: An adjusting sleeve is rotatably connected to the lower side of the air curtain sleeve, a gear ring is fixed to the inner wall of the adjusting sleeve, and the gear ring is meshed with the gear plate of the abutting circular table.
8. The polypropylene high-strength yarn spinning assembly according to claim 7, characterized in that: The height of the gear ring is greater than the thickness of the gear plate.