Radio frequency drying machine for printing and dyeing of polyester yarn after dyeing

Abstract

The utility model discloses a kind of radio frequency drying machine for printing and dyeing after polyester filament dyeing, including rack, radio frequency generator is equipped in its inside;Roller assembly, it includes roller and is set drive source one in the inside of rack rotation installation, roller assembly is pressed in the roller assembly for polyester filament and is set in rack, for drying;Guide mechanism, it is set in the feed port side of rack, for guiding polyester filament in drying cavity inside oscillation conveying.The utility model provides a kind of radio frequency drying machine for printing and dyeing after polyester filament dyeing, by setting guide mechanism, cooperation work is used to swing shaft assembly and air pipe component, guide polyester filament in feed port side oscillation conveying, so that bundle can be fully dispersed before entering main drying area;By setting discharge electrode sheet, charge is released to polyester filament in the swing shaft rod rotation process, effectively eliminates static electricity generated in dyeing and conveying process of polyester filament.

Description

Technical Field

[0001] This utility model relates to the field of textile drying technology, and in particular to a radio frequency dryer for printing and dyeing polyester yarn after dyeing. Background Technology

[0002] Polyester filament, as a type of synthetic fiber, typically requires drying after dyeing to remove moisture. Traditional drying methods often employ hot air drying or infrared drying; however, these methods suffer from low drying efficiency and uneven drying. Especially for heat-sensitive materials like polyester filament, traditional heating methods can easily lead to overheating, hardening, or thermal shrinkage of the filament surface, affecting the quality of the finished product.

[0003] Radio frequency drying technology utilizes the frictional heat generated by polar molecules inside the material under the action of a high-frequency electric field. It has the advantages of rapid heating and simultaneous heating inside and outside, making it suitable for drying polyester filaments.

[0004] However, existing radio frequency (RF) drying equipment typically handles polyester filaments by simply moving the filament bundles statically or by conveying them through the drying zone. Because polyester filaments have a high moisture content after dyeing and the filament bundles easily stick together, static or simple conveying methods cannot ensure that RF energy is applied evenly to each filament, resulting in uneven drying. Some filaments are over-dried while others remain uncooked. Furthermore, polyester filaments are prone to static electricity buildup during the drying process, which affects subsequent processing. Utility Model Content

[0005] Based on this, an RF dryer for printing and dyeing polyester filaments after dyeing is provided to solve the problems of uneven drying and static electricity accumulation of polyester filaments in the prior art.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A radio frequency (RF) dryer for dyeing polyester filaments after dyeing includes a frame with a drying chamber inside, an RF generator disposed inside the frame for generating RF energy to heat and dry the polyester filaments, a temperature sensor disposed inside the drying chamber for detecting the temperature inside the drying chamber, and a control system electrically connected to the RF generator and the temperature sensor for adjusting the output power of the RF generator based on the detection signal from the temperature sensor. The system also includes: A roller assembly, comprising a roller rotatably mounted inside a frame and a drive source disposed outside the frame; The pressure roller assembly, located inside the frame, is used to press polyester filaments onto the roller assembly for drying; The yarn guiding mechanism is located on one side of the feed inlet of the frame and is used to guide the polyester yarn to oscillate and be conveyed within the drying chamber. The wire guide mechanism includes a swing shaft assembly, a duct assembly, and a drive assembly, wherein the drive assembly drives the duct assembly and the swing shaft assembly to rotate. The swing shaft assembly includes a swing shaft rod rotatably mounted on the frame. The outer wall of the swing shaft rod is provided with a plurality of discharge electrode plates, and a plurality of wire channels are formed between the discharge electrode plates and the swing shaft rod. The air duct assembly includes an air duct rotatably mounted on the frame, one end of the air duct being connected to the output end of a high-pressure air pump via a rotary air connector, and the air duct having at least one set of air jet holes along its length. The drive assembly includes a second drive source mounted on a frame. The output end of the second drive source is fixedly connected to a drive gear. The outer wall of the drive gear meshes with two driven gears, which are respectively fixedly connected to the air duct and the swing shaft.

[0007] Furthermore, the machine frame is equipped with perforated conveyor belts on both sides inside, and a preheating fan is also installed inside the machine frame. The preheating fan blows hot air from the drying chamber to the pre-drying area of ​​the perforated conveyor belt through a duct.

[0008] Furthermore, the pressure roller assembly includes an electric push rod fixedly installed on the inner side wall of the frame, the output end of the electric push rod is fixedly connected to a roller frame, and the inner side wall of the roller frame is rotatably connected to a guide roller via a bearing.

[0009] Furthermore, the discharge electrode sheet has a protruding structure extending to both sides, and the protruding structure smoothly transitions to the straight portion of the discharge electrode sheet.

[0010] Furthermore, the end of the swing shaft is electrically connected to the power supply via a conductive ring and a conductive carbon brush to supply power to multiple discharge electrode plates, causing the discharge electrode plates to release charge to the polyester filament.

[0011] Compared with the prior art, the present invention has the following beneficial effects: This utility model provides an RF dryer for dyeing polyester filaments after dyeing. By setting up a yarn guiding mechanism, and utilizing the cooperation of a swing shaft assembly and an air duct assembly, the polyester filaments are guided to oscillate and be conveyed on one side of the feed inlet. This allows the filament bundles to fully disperse before entering the main drying zone, increasing the contact area between the filament bundles and the RF energy, and improving the uniformity of drying. By setting up discharge electrode plates, charges are released onto the polyester filaments during the rotation of the swing shaft, effectively eliminating static electricity generated during dyeing and conveying, preventing the filament bundles from sticking together, and facilitating subsequent processing. By setting up a preheating fan and a perforated conveyor belt, residual heat in the drying chamber is recovered and blown to the pre-drying area for pre-drying the polyester filaments. The pressure roller assembly tightly presses the polyester filaments onto the roller assembly, ensuring the flatness of the filament bundles during transmission. Attached Figure Description

[0012] Figure 1 A schematic diagram of the overall structure of an RF drying machine for printing and dyeing polyester yarn after dyeing, provided by this utility model; Figure 2 A side view cross-sectional structural diagram of an RF drying machine for printing and dyeing polyester filaments after dyeing, provided by this utility model; Figure 3 A top view of the structure of an RF drying machine for printing and dyeing polyester yarn after dyeing, provided by this utility model; Figure 4 A schematic diagram of the yarn guiding mechanism of an RF drying machine for printing and dyeing polyester yarn after dyeing, provided for this utility model; Figure 5 A schematic diagram of the swing shaft assembly structure of an RF dryer for printing and dyeing polyester filaments after dyeing, provided by this utility model; Figure 6 This utility model provides a schematic diagram of the duct assembly structure of an RF dryer for printing and dyeing polyester yarn after dyeing.

[0013] The markings in the diagram are explained as follows: 1. Frame; 11. RF generator; 2. Roller assembly; 21. Roller; 22. Drive source one; 3. Pressure roller assembly; 31. Electric push rod; 32. Roller frame; 33. Guide roller; 4. Wire guiding mechanism; 41. Swing shaft assembly; 411. Swing shaft rod; 412. Discharge electrode plate; 413. Wire channel; 414. Protruding structure; 42. Air duct assembly; 421. Air duct; 422. Rotary air connector; 423. Air jet hole; 43. Drive assembly; 431. Drive source two; 432. Drive gear; 433. Driven gear; 5. Perforated conveyor belt; 51. Preheating fan. Detailed Implementation

[0014] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention 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 invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0015] Example 1 Please refer to Figure 1-6A radio frequency (RF) dryer for dyeing polyester filaments includes a frame 1 with a semi-enclosed drying chamber inside, an RF generator 11 disposed inside the frame 1 for generating RF energy to heat and dry the polyester filaments, a temperature sensor disposed inside the drying chamber for detecting the temperature inside the drying chamber, and a control system electrically connected to the RF generator 11 and the temperature sensor, adjusting the output power of the RF generator according to the detection signal from the temperature sensor. The system also includes: The roller assembly 2 includes a roller 21 rotatably mounted inside the frame 1 and a drive source 22 disposed outside the frame 1, wherein the drive source 22 and the drive source 431 are servo motors with gearboxes. The pressure roller assembly 3 is installed inside the frame 1 and is used to press the polyester filaments onto the roller assembly 2 for drying. The yarn guiding mechanism 4 is located on one side of the feed inlet of the frame 1 and is used to guide the polyester yarn to be oscillated and conveyed in the drying chamber.

[0016] The radio frequency generator 11 is used to generate high-frequency radio frequency energy, which penetrates the interior of the polyester filament, causing water molecules to move violently and generate heat, thereby achieving simultaneous internal and external heating and drying. The temperature sensor is electrically connected to the control system, and the control system is also electrically connected to the radio frequency generator 11. The control system adjusts the output power of the radio frequency generator 11 through a PID algorithm based on the real-time temperature signal detected by the temperature sensor to achieve constant temperature control.

[0017] Example 2 The radio frequency dryer for printing and dyeing polyester filament after dyeing provided in Embodiment 1 is further optimized. Specifically, a perforated conveyor belt 5 is provided on both sides of the inside of the frame 1, and a preheating fan 51 is provided inside the frame 1. The preheating fan 51 blows the hot air in the drying chamber to the front drying area of ​​the perforated conveyor belt 5 through the duct.

[0018] The pressure roller assembly 3 includes an electric push rod 31 fixedly installed on the inner side wall of the frame 1. The output end of the electric push rod 31 is fixedly connected to a roller frame 32. The inner side wall of the roller frame 32 is rotatably connected to a guide roller 33 through a bearing.

[0019] After the polyester filament is guided by the yarn guide mechanism 4, it enters the roller assembly 2 area. The electric push rod 31 extends and pushes the roller frame 32 to move downward, so that the guide roller 33 presses the polyester filament onto the surface of the roller 21. The roller 21 rotates under the drive of the drive source 22, thereby pulling the polyester filament forward. By adjusting the stroke of the electric push rod 31, the pressure of the guide roller 33 on the polyester filament can be controlled to ensure that the polyester filament is closely attached to the surface of the roller 21 for conveying.

[0020] This pressing conveying method serves to flatten the filament bundles and allows them to tumble on the surface of the roller 21, ensuring drying quality. Furthermore, the roller 21, under the irradiation of the radio frequency generator 11, can iron the filament bundles.

[0021] During the radio frequency drying process, a large amount of heat is generated in the drying chamber, and some of the heat is discharged through the exhaust port. In this embodiment, the hot air in the chamber is extracted by the preheating fan 51 and blown to the pre-drying area at the feed inlet. When the wet polyester yarn enters the hollow conveyor belt 5, it first comes into contact with the hot air for pre-drying. This not only utilizes the residual heat and reduces energy consumption, but also reduces the load of the subsequent radio frequency drying and improves the drying efficiency of the whole machine.

[0022] Example 3 The radio frequency dryer for printing and dyeing polyester yarn after dyeing provided in Embodiment 1 or 2 is further optimized. The yarn guiding mechanism 4 includes a swing shaft assembly 41, an air duct assembly 42 and a drive assembly 43. The drive assembly 43 drives the air duct assembly 42 and the swing shaft assembly 41 to rotate.

[0023] The swing shaft assembly 41 includes a swing shaft 411 rotatably mounted on the frame 1. The outer wall of the swing shaft 411 is provided with a plurality of discharge electrode plates 412, and a plurality of wire channels 413 are formed between the discharge electrode plates 412 and the swing shaft 411.

[0024] The discharge electrode sheet 412 has a protruding structure 414 extending to both sides, and the protruding structure 414 smoothly transitions to the straight portion of the discharge electrode sheet 412.

[0025] Before the dyed polyester yarn enters the dryer, it first passes through the yarn guide mechanism 4. The second drive source 431 is started, and the air duct 421 and the swing shaft 411 are driven to rotate synchronously through gear transmission.

[0026] The end of the swing shaft 411 is electrically connected to the power supply through a conductive ring and a conductive carbon brush to supply power to multiple discharge electrode plates 412, so that the discharge electrode plates 412 release charge to the polyester filament.

[0027] The duct assembly 42 includes a duct 421 rotatably mounted on the frame 1. One end of the duct 421 is connected to the output end of a high-pressure air pump via a rotary air connector 422. The duct 421 has at least one set of air jet holes 423 along its length.

[0028] The drive assembly 43 includes a second drive source 431 mounted on the frame 1. The output end of the second drive source 431 is fixedly connected to a drive gear 432. The outer wall of the drive gear 432 meshes with two driven gears 433. The two driven gears 433 are fixedly connected to the air duct 421 and the swing shaft 411 respectively.

[0029] As the polyester filaments pass through the conductor channel 413, the rotation of the swing shaft 411 causes the polyester filaments to oscillate and be conveyed in a left-right swinging manner. At the same time, the high-pressure air pump supplies air to the air duct 421 through the rotary air connector 422, and the airflow is ejected from the air jet hole 423 to disperse the passing polyester filaments. During this process, the discharge electrode plate 412 is connected to the high-voltage power supply to release the charge on the polyester filaments passing through the conductor channel 413 and neutralize the static electricity on the surface of the polyester filaments. This structure ensures that the polyester filaments are fully dispersed and static electricity is eliminated before entering the main drying zone, avoiding uneven drying caused by the filament bundle sticking together.

[0030] The operation process of the radio frequency dryer for printing and dyeing after polyester yarn dyeing provided by this utility model is as follows: the control system is turned on, the radio frequency generator 11 preheats, the temperature sensor starts monitoring, and the drive source 1 22, drive source 2 431, preheating fan 51 and high pressure air pump are started.

[0031] The preheating fan 51 draws hot air from the drying chamber and blows it onto the perforated conveyor belt 5 area to pre-dry the polyester filaments.

[0032] After dyeing, the polyester filaments enter through the feed inlet and first pass through the guide mechanism 4. The drive source 431 meshes with the driven gear 433 through the drive gear 432, thereby driving the swing shaft 411 and the air duct 421 to rotate. The polyester filaments oscillate and move within the wire channel 413. At the same time, the air duct 421 sprays out high-pressure airflow to disperse the filament bundle, and the discharge electrode plate 412 releases charge to eliminate static electricity.

[0033] Polyester filaments enter the roller assembly 2 area, and electric push rod 31 drives guide roller 33 to press down, pressing the filament bundle onto roller 21. Radio frequency generator 11 generates radio frequency energy, which penetrates the interior of the polyester filaments for deep heating and drying. Temperature sensor monitors the temperature in real time and feeds it back to control system. Control system dynamically adjusts radio frequency power to maintain constant temperature drying.

[0034] The dried polyester filaments are output from the discharge port and enter the next process.

[0035] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; conversely, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this 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 specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A radio frequency (RF) dryer for printing and dyeing polyester filaments after dyeing, comprising a frame (1) having a drying chamber inside, an RF generator (11) disposed inside the frame (1) for generating RF energy to heat and dry the polyester filaments, a temperature sensor disposed inside the drying chamber for detecting the temperature inside the drying chamber; and a control system electrically connected to the RF generator (11) and the temperature sensor, adjusting the output power of the RF generator according to the detection signal from the temperature sensor, characterized in that... Also includes: The roller assembly (2) includes a roller (21) rotatably mounted inside the frame (1) and a drive source (22) disposed outside the frame (1). The pressure roller assembly (3) is set inside the frame (1) and is used to press the polyester yarn onto the roller assembly (2) for drying; The yarn guiding mechanism (4) is set on the feed port side of the frame (1) to guide the polyester yarn to oscillate and be conveyed in the drying chamber; The wire guide mechanism (4) includes a swing shaft assembly (41), a duct assembly (42), and a drive assembly (43), wherein the drive assembly (43) drives the duct assembly (42) and the swing shaft assembly (41) to rotate. The swing shaft assembly (41) includes a swing shaft (411) rotatably mounted on the frame (1). The outer wall of the swing shaft (411) is provided with a plurality of discharge electrode plates (412), and a plurality of wire channels (413) are formed between the discharge electrode plates (412) and the swing shaft (411). The duct assembly (42) includes a duct (421) rotatably mounted on the frame (1). One end of the duct (421) is connected to the output end of the high-pressure air pump through a rotary air connector (422). The duct (421) has at least one set of air jet holes (423) along its length. The drive assembly (43) includes a second drive source (431) mounted on the frame (1). The output end of the second drive source (431) is fixedly connected to a drive gear (432). The outer wall of the drive gear (432) meshes with two driven gears (433). The two driven gears (433) are fixedly connected to the air duct (421) and the swing shaft (411) respectively.

2. The radio frequency drying machine for printing and dyeing polyester filaments after dyeing, as described in claim 1, is characterized in that, The frame (1) is also equipped with perforated conveyor belts (5) on both sides inside, and a preheating fan (51) is also installed inside the frame (1). The preheating fan (51) blows hot air from the drying chamber to the pre-drying area of ​​the perforated conveyor belt (5) through a duct.

3. The radio frequency drying machine for printing and dyeing polyester filaments after dyeing, as described in claim 1, is characterized in that, The pressure roller assembly (3) includes an electric push rod (31) fixedly installed on the inner wall of the frame (1). The output end of the electric push rod (31) is fixedly connected to a roller frame (32). The inner wall of the roller frame (32) is rotatably connected to a guide roller (33) via a bearing.

4. The radio frequency drying machine for printing and dyeing polyester filaments after dyeing, as described in claim 1, is characterized in that, The discharge electrode sheet (412) has a protruding structure (414) extending to both sides, and the protruding structure (414) smoothly transitions to the straight portion of the discharge electrode sheet (412).

5. The radio frequency drying machine for printing and dyeing polyester filaments after dyeing, as described in claim 4, is characterized in that, The end of the swing shaft (411) is electrically connected to the power supply through a conductive ring and a conductive carbon brush to supply power to multiple discharge electrode plates (412), so that the discharge electrode plates (412) release charge to the polyester filament.

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