Relaxing heat setting device for processing polyester staple fiber

Abstract

This utility model relates to the field of polyester staple fiber processing technology, specifically to a relaxation heat setting device for polyester staple fiber processing. It includes a heating chamber, with a conveying roller rotatably connected to the front and rear ends of the heating chamber for transporting the polyester staple fiber. A heating mechanism for heating the polyester staple fiber is located inside the heating chamber and on the upper and lower sides of the conveying roller. A cooling box is fixed to the outer wall of the heating chamber on the side away from the feed inlet. In this utility model, the heating chamber heats the polyester staple fiber, and the heated polyester staple fiber is first transported to the main heat exchange tube. A second air inlet fan and an auxiliary heat exchange tube allow the air to exchange heat with the cold water in the cooling box, thus cooling the fiber. The cooled air is then transported to the main heat exchange tube to further cool the polyester staple fiber. This reduces the temperature difference between the polyester staple fiber and the cold water, preventing damage to the polyester staple fiber due to excessive temperature difference.

Description

Technical Field

[0001] This utility model relates to the field of polyester staple fiber processing technology, specifically to a relaxation heat setting device for polyester staple fiber processing. Background Technology

[0002] Polyester staple fiber is obtained by spinning polyester (polyethylene terephthalate, abbreviated as PTA) into filaments and then cutting them. Regenerated polyester staple fiber is made from polyester fabric, waste polyester bottle flakes, and waste spinning fibers as raw materials, and is produced through processes such as crushing, washing, drying, melt extrusion, spinning, winding, bundling, stretching, crimping, relaxation heat setting, and cutting.

[0003] In polyester staple fiber production, relaxation heat setting is a crucial post-processing step. Its core involves heating the fiber under no or very low tension (preheating to 70-100℃ to soften the fiber and remove oil, then raising the temperature to 120-180℃ and holding for 10-30 minutes during the heat setting stage to release stress, adjust the polymer chain arrangement, and finally cool and fix the structure). Through the synergistic effect of "heating + relaxation," residual internal stress from the stretching process is eliminated, stabilizing fiber dimensions. After heating, polyester staple fibers often require cooling and setting. The cooling method is often to directly immerse the fibers in cold water. However, direct immersion in cold water can easily create a large temperature difference, affecting the structure of the polyester staple fiber. This results in the cold water temperature often being relatively high, which limits the cooling and setting effect of the polyester staple fiber. Therefore, existing relaxation heat setting devices for polyester staple fibers still have shortcomings.

[0004] In summary, it is necessary to invent a relaxation heat setting device for processing polyester staple fibers. Utility Model Content

[0005] To address this issue, this invention provides a relaxation heat setting device for processing polyester staple fibers, which solves the problem that directly entering cold water can easily generate a large temperature difference, thereby affecting the structure of polyester staple fibers. This results in the cold water temperature often being relatively high, and the high water temperature leads to limited cooling and setting effect of polyester staple fibers.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a relaxation heat setting device for processing polyester staple fibers, comprising a heating chamber, wherein a conveying roller for conveying polyester staple fibers is rotatably connected to the front and rear ends of the heating chamber, a heating mechanism for heating the polyester staple fibers is provided inside the heating chamber and on the upper and lower sides of the conveying roller, and a cooling box is fixed on the outer wall of the heating chamber and on the side away from the feed inlet, wherein a cooling mechanism for cooling the polyester staple fibers is provided inside the cooling box.

[0007] Preferably, the heating mechanism includes hot air nozzles, and two hot air nozzles are fixed to the upper and lower sides of the inner wall of the heating chamber by brackets, and hot air nozzles are fixed on opposite sides of the two hot air nozzles.

[0008] Preferably, an air heating box is installed on one side of the top of the outer wall of the heating chamber, and a first air intake fan for evacuating the air heating box is provided on the top of the outer wall of the heating chamber and on the side of the air heating box. The air supply end of the first air intake fan is connected to the air intake end of the hot air nozzle through a pipe, and the rear ends of the outer walls of the two hot air nozzles are connected through a return pipe.

[0009] Preferably, the bottom of the outer wall of the cooling box is fixedly connected to the side of the outer wall of the heating chamber via a bottom bracket. The cooling mechanism includes partitions, all of which are fixed to one side of the inner wall of the cooling box. A main heat exchange tube is fixed inside the cooling box on the side of the partitions closest to the heating chamber.

[0010] Preferably, the other end of the main heat exchange tube is connected to the inner wall side of the cooling box and to the inlet of the polyester short fiber, and the inner wall side of the main heat exchange tube is provided with a gas storage tank.

[0011] Preferably, each of the inner wall sides of the main heat exchange tube is provided with a vent hole for ventilation, and the vent hole is connected to the inner wall side of the gas storage tank.

[0012] Preferably, a cold water supply pipe is fixedly connected to the top of the outer wall of the cooling box and to the side of the partition near the heating chamber, and a drain pipe is fixedly connected to the front of the outer wall of the cooling box and to the other side above the partition.

[0013] Preferably, a second air inlet fan is installed on one side of the top of the outer wall of the cooling box. The air supply end of the second air inlet fan is fixedly connected to a secondary heat exchange pipe. The secondary heat exchange pipe is located inside the cooling box and above the main heat exchange pipe. The bottom end of the secondary heat exchange pipe is connected to the top air inlet end of the main heat exchange pipe.

[0014] The beneficial effects of this utility model are: In this invention, a heating chamber is provided to heat the polyester staple fiber. The heated polyester staple fiber is then transported to the main heat exchange tube. A second air inlet fan and an auxiliary heat exchange tube are used to exchange heat between the air and the cold water in the cooling chamber, thus cooling the polyester staple fiber. The cooled air is then transported to the main heat exchange tube to further cool the polyester staple fiber. This reduces the temperature difference between the polyester staple fiber and the cold water, preventing damage to the polyester staple fiber due to excessive temperature difference, and making it more convenient for users. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the external structure of the present invention viewed from the front. Figure 2This is a partial cross-sectional view of the present invention from the front view. Figure 3 This utility model Figure 2 Enlarged structural diagram at point A; Figure 4 This is a three-dimensional structural diagram of the hot air nozzle and hot air jet nozzle in this utility model.

[0016] In the diagram: 100, heating chamber; 110, hot air nozzle; 111, hot air jet nozzle; 120, air heating box; 121, first air intake fan; 130, material conveying roller; 200, cooling box; 201, bottom support; 202, partition; 210, cold water conveying pipe; 220, second air intake fan; 221, auxiliary heat exchanger pipe; 230, main heat exchanger pipe; 231, air storage tank. Detailed Implementation

[0017] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0018] See attached document Figures 1-4This utility model provides a relaxation heat setting device for processing polyester staple fibers, including a heating chamber 100. A conveying roller 130 for transporting polyester staple fibers is rotatably connected to the front and rear ends of the heating chamber 100. A servo motor is installed at the rear end of the outer wall of the heating chamber 100, corresponding to the position of the conveying roller 130. The servo motor drives the conveying roller 130 to rotate, enabling it to transport the polyester staple fibers. A heating mechanism for heating the polyester staple fibers is installed inside the heating chamber 100, above and below the conveying roller 130. The heating mechanism includes two hot air nozzles 110, both fixed to the upper and lower sides of the inner wall of the heating chamber 100 by brackets. Hot air nozzles 111 are fixed to opposite sides of each of the two hot air nozzles 110. An air heating box 120 is installed on one side of the top of the outer wall of the heating chamber 100. A first air intake fan 121 is provided at the top of the outer wall of the heating chamber 100 and on one side of the air heating chamber 120 to draw air from the air heating chamber 120. The air supply end of the first air intake fan 121 is connected to the air intake end of the hot air nozzle 110 through a pipe. The rear ends of the outer walls of the two hot air nozzles 110 are connected through a return pipe. The air heating chamber 120 can heat the incoming air by heating resistance wire or infrared heater. After being powered on, the first air intake fan 121 can first deliver the outside air into the air heating chamber 120 for heating. The heated air can be delivered to the hot air nozzle 110 through the first air intake fan 121. The two hot air nozzles 110 can spray hot air out through hot air nozzles 111 to heat the polyester short fibers conveyed by the conveying roller 130. The top of the heating chamber 100 can be connected to a hot air exhaust pipe to exhaust the hot air. A cooling box 200 is fixed to the outer wall of the heating chamber 100, away from the feed inlet. The cooling box 200 contains a cooling mechanism for cooling polyester staple fibers. The bottom of the outer wall of the cooling box 200 is fixedly connected to the side of the outer wall of the heating chamber 100 via a bottom bracket 201. The cooling mechanism includes partitions 202, which are all fixed to one side of the inner wall of the cooling box 200. Drainage outlets are provided on both sides of the outer wall of the partitions 202 to ensure the flow of cold water. The interior of the cooling box 200, located near the partitions 202 and close to the heating chamber 100... One side of the cooling box 200 is fixed with a main heat exchange tube 230. The other end of the main heat exchange tube 230 is connected to the inner wall side of the cooling box 200 and to the inlet of the polyester short fiber. The inner wall side of the main heat exchange tube 230 is provided with an air storage tank 231 and an air vent for ventilation. The air vent is connected to the inner wall side of the air storage tank 231. The heated polyester short fiber can be transported into the main heat exchange tube 230. The main heat exchange tube 230 can exchange heat and cool down the heated polyester short fiber with cold water. A cold water supply pipe 210 is fixedly connected to the top of the outer wall of the cooling box 200, on the side of the partition 202 near the heating chamber 100. The cold water supply pipe 210 is used to transport the cooled water into the cooling box 200 to cool the polyester staple fibers. A drain pipe is fixedly connected to the front of the outer wall of the cooling box 200, on the other side above the partition 202. The drain pipe is used to discharge the cooled water after heat exchange. A second air inlet fan 220 is installed on one side of the top of the outer wall of the cooling box 200. The air supply end of the second air inlet fan 220 is fixedly connected to a secondary heat exchange pipe 221. The secondary heat exchange pipe 221 is located inside the cooling box 200. Located above the main heat exchange tube 230, the bottom end of the auxiliary heat exchange tube 221 is connected to the top air inlet of the main heat exchange tube 230. The second air inlet fan 220 can deliver outdoor air into the auxiliary heat exchange tube 221. The auxiliary heat exchange tube 221 can exchange heat with low-temperature water to cool the air, thereby reducing the air temperature. The cooled air can be sprayed out through the vent to cool the polyester staple fiber conveyed by the main heat exchange tube 230. This pre-cools the polyester staple fiber when it comes into contact with the cold water, thereby reducing the temperature difference between the polyester staple fiber and the cold water and preventing damage to the polyester staple fiber during cooling.

[0019] The usage process of this utility model is as follows: Those skilled in the art can first assemble the device according to the above description, then connect all electrical equipment to an external power supply, and control the operation of the device through an external controller. The control programs of all electrical equipment are edited by the production personnel in advance before production. This utility model does not make any technical improvements here, but only assumes that it can normally meet the needs of personnel. First, personnel can wrap the polyester staple fibers to be heated around the outer wall of the conveying roller 130, and then drive the conveying roller 130 to rotate through a servo motor, so that the conveying roller 130 can convey the polyester staple fibers. During the process of conveying the polyester staple fibers through the conveying roller 130, the air heating box 120 and the first air intake fan 121 can be powered on. The first air intake fan 121 can deliver air to the air heating box 120, and the air heating box 120 can heat the air through heating resistance wire and infrared heater. The heated air can enter the hot air nozzle 110, and the hot air nozzle 110 can heat the polyester staple fibers conveyed in the conveying roller 130 through the hot air nozzle 111. After the polyester staple fiber is heated, it enters the main heat exchange tube 230. Then, the chilled water delivery pipe 210 delivers chilled water generated by the chiller to the cooling box 200. Then, the second air intake fan 220 is started. The second air intake fan 220 delivers air to the air storage tank 231 after exchanging heat with the chilled water and cooling it. Then, the air storage tank 231 delivers air to the inside of the main heat exchange tube 230 to cool the polyester staple fiber. At the same time, the main heat exchange tube 230 can exchange heat with the chilled water and also cool the polyester staple fiber. After being cooled by air, the polyester staple fiber can be immersed in the chilled water on the right side of the partition 202 to cool the polyester staple fiber better. The cooled polyester staple fiber can be discharged through the discharge port, and the cooled water after heat exchange can be discharged through the drain pipe.

[0020] The above description is merely a preferred embodiment of this utility model. Any person skilled in the art may modify this utility model or modify it into an equivalent technical solution using the technical solutions described above. Therefore, any simple modifications or equivalent substitutions made based on the technical solutions of this utility model are within the scope of protection claimed by this utility model.

Claims

1. A relaxation heat setting device for processing polyester staple fibers, characterized in that: The device includes a heating chamber (100), with a conveying roller (130) rotatably connected to the front and rear ends of the heating chamber (100) for conveying polyester staple fibers. A heating mechanism for heating polyester staple fibers is provided inside the heating chamber (100) and on the upper and lower sides of the conveying roller (130). A cooling box (200) is fixed on the outer wall of the heating chamber (100) away from the feed inlet. A second air inlet fan (220) is installed on the top side of the outer wall of the cooling box (200). The air inlet end of the second air inlet fan (220) is fixedly connected to a secondary heat exchange tube (221). The secondary heat exchange tube (221) is located inside the cooling box (200) and above the main heat exchange tube (230). The bottom end of the secondary heat exchange tube (221) is connected to the top air inlet end of the main heat exchange tube (230). A cooling mechanism for cooling polyester staple fibers is provided inside the cooling box (200).

2. The relaxation heat setting device for processing polyester staple fibers according to claim 1, characterized in that: The heating mechanism includes hot air nozzles (110), and both hot air nozzles (110) are fixed to the upper and lower sides of the inner wall of the heating chamber (100) by brackets. Hot air nozzles (111) are fixed on opposite sides of the two hot air nozzles (110).

3. The relaxation heat setting device for processing polyester staple fibers according to claim 2, characterized in that: An air heating box (120) is installed on one side of the top of the outer wall of the heating chamber (100). A first air intake fan (121) for evacuating air from the air heating box (120) is provided on the top of the outer wall of the heating chamber (100) and on one side of the air heating box (120). The air supply end of the first air intake fan (121) is connected to the air intake end of the hot air nozzle (110) through a pipe. The rear ends of the outer walls of the two hot air nozzles (110) are connected through a return pipe.

4. The relaxation heat setting device for processing polyester staple fibers according to claim 1, characterized in that: The bottom of the outer wall of the cooling box (200) is fixedly connected to the side of the outer wall of the heating chamber (100) via a bottom bracket (201). The cooling mechanism includes a partition (202), which is fixed to one side of the inner wall of the cooling box (200). A main heat exchange tube (230) is fixed inside the cooling box (200) and on the side of the partition (202) near the heating chamber (100).

5. The relaxation heat setting device for processing polyester staple fibers according to claim 4, characterized in that: The other end of the main heat exchange tube (230) is connected to the inner wall side of the cooling box (200) and to the inlet of the polyester short fiber. The inner wall side of the main heat exchange tube (230) is provided with a gas storage tank (231).

6. The relaxation heat setting device for processing polyester staple fibers according to claim 5, characterized in that: The inner wall side of the main heat exchange tube (230) is provided with a vent hole for ventilation, and the vent hole is connected to the inner wall side of the gas storage tank (231).

7. The relaxation heat setting device for processing polyester staple fibers according to claim 5, characterized in that: A cold water delivery pipe (210) is fixedly connected to the top of the outer wall of the cooling box (200) and to the side of the partition (202) near the heating chamber (100), and a drain pipe is fixedly connected to the front of the outer wall of the cooling box (200) and above the other side of the partition (202).

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