Apparatus and process for the production of recycled polyester staple fibers for heat-resistant press nonwoven articles

Abstract

The application discloses a kind of preparation device and process for recycled polyester staple fiber for heat-resistant press non-woven product, belong to polyester staple fiber preparation technical field, solve the problem of uneven material temperature, low moisture content of material, low quality of fiber in prior art, including tank, one side of tank is equipped with feeding pipe, bottom is equipped with discharge pipe, the inside of tank is equipped with stirring mechanism, stirring mechanism includes upper baffle and lower baffle, a plurality of stirring rods are equipped between upper baffle and lower baffle.The application realizes the rotation of upper baffle, lower baffle and stirring rod at the same time by the driving of motor to upper baffle, ensures that the temperature of material in tank maintains the state of uniform inside and outside, water body is transported into accommodating cavity by water pipe, water body enters cavity through accommodating cavity and is discharged into tank through water outlet hole, so that the moisture content of material can be improved, and the quality of fiber product is ensured.

Description

Technical Field

[0001] This invention belongs to the field of polyester staple fiber preparation technology, and more specifically, it relates to an apparatus and process for preparing recycled polyester staple fibers for heat-resistant nonwoven products. Background Technology

[0002] After ordinary fibers are prepared, they only need to be combed into a web and made into a corresponding blanket-like fabric. However, for the lining of handicrafts such as eyeglass cases or gift packaging boxes, the fabric needs to have a brighter color, which means that the color change of the fibers needs to be consistent after being molded at high temperature.

[0003] In existing related technologies, the preparation of polyester staple fibers generally includes processes such as drying, melting, filtering, spinning, drawing, and cutting. After drying and before melting, the material is stored in a dedicated tank. When melting is required, it is fed from the tank into the screw extruder. Depending on the production process and actual changes in production conditions, the screw extruder speed varies in real time. This makes it difficult to strictly control the storage time of the material in the tank. When the material is stored in the tank for a long time, a significant temperature difference develops between the internal temperature of the material and the temperature near the inner wall of the tank. This results in a large temperature fluctuation range when the material enters the screw extruder, increasing the difficulty of process control in the preparation of polyester staple fibers and potentially negatively impacting the quality of the finished product. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing an apparatus and process for preparing recycled polyester staple fibers for heat-resistant nonwoven products that maintains uniform material temperature, increases material moisture content, and produces high-quality fibers.

[0005] To achieve the above-mentioned technical objectives, the technical solution adopted by the apparatus and process for preparing recycled polyester staple fibers for heat-resistant nonwoven products in this invention is as follows: An apparatus for preparing recycled polyester staple fiber for heat-resistant nonwoven products includes a tank for storing materials, a feeding pipe on one side of the tank, a discharge pipe at the bottom of the tank, and a valve on the discharge pipe; an agitation mechanism is provided inside the tank, the agitation mechanism includes an upper partition and a lower partition, the upper partition is flat, the lower partition is mesh, the upper partition and the lower partition are arranged in parallel, a plurality of agitating rods are provided between the upper partition and the lower partition, a motor and a main shaft are provided at the top of the tank, one end of the main shaft is connected to the output shaft of the motor, and the other end of the main shaft passes through the tank and is connected to the top of the upper partition.

[0006] Preferably, one end of the feeding pipe that communicates with the tank body is located between the upper partition and the lower partition, and a plurality of stirring rods are arranged at equal intervals, one end of the stirring rod being connected to the bottom of the upper partition and the other end of the stirring rod being connected to the top of the lower partition.

[0007] Preferably, the inner wall of the tank is further provided with a pair of clamping rings, the inner wall of the clamping rings is provided with limiting grooves, the upper partition is adapted to be disposed in the limiting groove of one of the clamping rings, and the lower partition is adapted to be disposed in the limiting groove of the other clamping ring, and both the upper partition and the lower partition can rotate within the corresponding limiting grooves.

[0008] Preferably, the inner wall of the limiting groove is provided with a graphite layer, one graphite layer in the limiting groove covers the portion of the upper partition plate located in the limiting groove, and the other graphite layer in the limiting groove covers the portion of the lower partition plate located in the limiting groove.

[0009] Preferably, the outer wall of the stirring rod is separated from the inner wall of the clamping ring, the minimum distance between the outer wall of the stirring rod and the inner wall of the clamping ring is greater than the outer diameter of the material, and the inner diameter of the mesh on the lower partition is greater than the outer diameter of the material.

[0010] Preferably, the upper partition has a receiving cavity, the stirring rod has a cavity, the receiving cavity and the cavity are interconnected, the outer wall of the stirring rod has a plurality of water outlet holes, the water outlet holes are interconnected with the cavity, and the top of the tank has a water supply pipe for supplying water into the receiving cavity.

[0011] Preferably, the top of the tank is further provided with a hydraulic cylinder and a sleeve. The top of the upper partition is provided with an opening communicating with the accommodating cavity. One end of the sleeve is located above the tank, and the other end of the sleeve passes through the tank and extends to the inside of the tank. The water supply pipe passes through the sleeve, and the outer wall of the water supply pipe is in contact with the inner wall of the sleeve. The push rod of the hydraulic cylinder is connected to the outer wall of the water supply pipe. The hydraulic cylinder is used to drive the water supply pipe to be inserted into the opening or pulled out of the opening.

[0012] Preferably, the accommodating cavity is provided with a baffle and an elastic support body, and a sealing ring is provided on the inner wall of the accommodating cavity and outside the opening. The elastic support body supports the baffle and fits against the sealing ring. The bottom of the water supply pipe is provided with a water outlet pipe, the outer diameter of the water outlet pipe gradually decreases from top to bottom, and a drain hole is provided on the outer wall of the water outlet pipe. The water enters the accommodating cavity through the drain hole.

[0013] Preferably, the elastic support includes a pair of bases, the top of the bases is provided with a receiving groove, the receiving groove is provided with a spring and a support rod, one end of the support rod is connected to the bottom of the baffle, the other end of the support rod is connected to the spring, a pressure sensor is provided at the bottom of the receiving groove and inside the spring, the signal output terminal of the pressure sensor is connected to a controller, and the controller is used to control the input of water.

[0014] The process for preparing recycled polyester staple fibers for heat-resistant nonwoven products includes the following steps: S1. Close the valve and feed the material into the tank through the feeding pipe; S2. Start the motor and drive the main shaft and the upper partition to rotate, and the upper partition drives the stirring rod and the lower partition to rotate; S3. Turn off the motor, retract the push rod of the hydraulic cylinder and drive the water pipe to be inserted into the opening, and the water pipe delivers water into the accommodating cavity; S4. Extend the push rod of the hydraulic cylinder and drive the water pipe to be pulled out of the opening; S5. Restart the motor and open the valve to output the material downward through the discharge pipe.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This application utilizes an electric motor to drive the upper partition, enabling simultaneous rotation of the upper partition, lower partition, and agitator. This agitator stirs the material within the tank, ensuring a uniform temperature throughout the tank. Water is supplied to the containment cavity via a water pipe, entering the empty cavity and exiting into the tank through the outlet. This increases the moisture content of the material, preventing it from becoming too low due to prolonged storage. This ensures the material maintains the required process specifications, thereby guaranteeing the quality of the finished fiber product. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional view of the internal structure of the upper partition and water pipe in this invention; Figure 3 yes Figure 2 The reference diagram shows the action state.

[0017] In the diagram: 1. Tank body; 11. Feeding pipe; 12. Discharge pipe; 13. Valve; 14. Clamping ring; 140. Limiting groove; 15. Hydraulic cylinder; 16. Sleeve; 2. Upper partition; 21. Receiving cavity; 22. Opening; 23. Sealing ring; 3. Lower partition; 4. Stirring rod; 41. Cavity; 42. Water outlet; 5. Motor; 50. Main shaft; 6. Water supply pipe; 61. Water outlet pipe; 62. Drainage hole; 7. Baffle; 8. Elastic support body; 81. Base; 82. Receiving groove; 83. Spring; 84. Support rod; 85. Pressure sensor. Detailed Implementation

[0018] The invention will be further described below with reference to the accompanying drawings and specific embodiments: like Figure 1 — Figure 3 As shown, the apparatus for preparing recycled polyester staple fiber for heat-resistant nonwoven products includes a tank 1 for storing materials. A feeding pipe 11 is provided on one side of the tank 1, and a discharge pipe 12 is provided at the bottom of the tank 1. A valve 13 is provided on the discharge pipe 12. An agitation mechanism is provided inside the tank 1. The agitation mechanism includes an upper partition 2 and a lower partition 3. The upper partition 2 is flat, and the lower partition 3 is mesh. The upper partition 2 and the lower partition 3 are arranged in parallel. Several agitating rods 4 are provided between the upper partition 2 and the lower partition 3. A motor 5 and a main shaft 50 are provided at the top of the tank 1. One end of the main shaft 50 is connected to the output shaft of the motor 5, and the other end of the main shaft 50 passes through the tank 1 and is connected to the top of the upper partition 2.

[0019] When valve 13 is closed, material is fed into tank 1 through feed pipe 11. When material needs to be fed into the screw extruder, since the upper baffle 2 is mesh-like, material feeding can be achieved by opening valve 13. When material needs to be stored in tank 1 for a long time, motor 5 is turned on, which drives the main shaft 50 and upper baffle 2 to rotate. In turn, the upper baffle 2 drives the stirring rod 4 and lower baffle 3 to rotate, which can reliably achieve the stirring effect on the material, so that the overall temperature of the material is relatively uniform, avoiding excessive temperature difference between the inside and outside of the material, and ensuring that the temperature of the material fed into the screw extruder is consistent.

[0020] One end of the feeding pipe 11, which connects to the tank body 1, is located between the upper partition 2 and the lower partition 3. Several stirring rods 4 are evenly spaced, with one end of each stirring rod 4 connected to the bottom of the upper partition 2 and the other end connected to the top of the lower partition 3. Material is fed into the tank body 1 through the feeding pipe 11, and the material can pass through the lower partition 3 but cannot pass through the upper partition 2. In this way, the upper partition 2, the lower partition 3, and the stirring rods 4 can rotate reliably without affecting the discharge.

[0021] A pair of clamping rings 14 are also provided on the inner wall of the tank body 1. The inner wall of the clamping rings 14 is provided with limiting grooves 140. The upper partition 2 is adapted to be disposed in the limiting groove 140 of one clamping ring 14, and the lower partition 3 is adapted to be disposed in the limiting groove 140 of the other clamping ring 14. Both the upper partition 2 and the lower partition 3 can rotate within their respective limiting grooves 140. The clamping rings 14 and the limiting grooves 140 ensure that the upper partition 2 and the lower partition 3 can reliably rotate along their own axes without any directional movement, thereby ensuring that the stirring rod 4 can be kept in a vertical state.

[0022] The inner wall of the limiting groove 140 is provided with a graphite layer. The graphite layer in one limiting groove 140 covers the portion of the upper partition 2 located within the limiting groove 140, and the graphite layer in the other limiting groove 140 covers the portion of the lower partition 3 located within the limiting groove 140. When the upper partition 2 and the lower partition 3 rotate, they will rub against the corresponding graphite layer, thereby generating a graphite lubricating layer, which improves the smoothness of the rotation of the upper partition 2 and the lower partition 3.

[0023] The outer wall of the agitator 4 is separated from the inner wall of the clamping ring 14. The minimum distance between the outer wall of the agitator 4 and the inner wall of the clamping ring 14 is greater than the outer diameter of the material, and the inner diameter of the mesh on the lower partition 3 is greater than the outer diameter of the material. The large distance between the agitator 4 and the clamping ring 14 ensures that the material will not get stuck between the agitator 4 and the clamping ring 14; the large inner diameter of the mesh on the lower partition 3 ensures that the material can pass through the lower partition 3 and enter the discharge pipe 12.

[0024] The upper partition 2 has a receiving cavity 21, and the stirring rod 4 has a cavity 41. The receiving cavity 21 and the cavity 41 are interconnected. The outer wall of the stirring rod 4 has several water outlet holes 42, which are connected to the cavity 41. The top of the tank 1 is equipped with a water supply pipe 6, which is used to supply water into the receiving cavity 21. When the material is stored in the tank 1 for too long and a lot of moisture evaporates from the material, the motor 5 is turned off, and water is supplied into the receiving cavity 21 through the water supply pipe 6. After entering the receiving cavity 21, the water flows into the cavity 41 and is discharged out through the water outlet holes 42. At this time, the motor 5 is turned on again, so that the stirring rod 4 agitates the material again, thereby allowing the water to be evenly distributed in the material, thus replenishing the moisture content of the material.

[0025] The top of the tank body 1 is also equipped with a hydraulic cylinder 15 and a sleeve 16. The top of the upper partition 2 has an opening 22 communicating with the receiving cavity 21. One end of the sleeve 16 is located above the tank body 1, and the other end of the sleeve 16 passes through the tank body 1 and extends to the inside of the tank body 1. The water supply pipe 6 passes through the sleeve 16, and the outer wall of the water supply pipe 6 is in contact with the inner wall of the sleeve 16. The push rod of the hydraulic cylinder 15 is connected to the outer wall of the water supply pipe 6. The hydraulic cylinder 15 is used to drive the water supply pipe 6 to insert into or pull out of the opening 22. When the motor 5 drives the upper partition 2, the hydraulic cylinder 15 can lift the water supply pipe 6, so that the water supply hanger is separated from the upper partition 2. The sleeve 16 is provided to limit the movement of the water supply pipe 6, ensuring that the water supply pipe 6 can move back and forth along the axial direction of the sleeve 16. At the same time, it can also improve the smoothness of the movement of the water supply pipe 6 and ensure that the water supply pipe 6 will not break.

[0026] The accommodating cavity 21 is equipped with a baffle 7 and an elastic support 8. A sealing ring 23 is provided on the inner wall of the accommodating cavity 21 outside the opening 22. The elastic support 8 supports the baffle 7 and fits in close contact with the sealing ring 23. The bottom of the water supply pipe 6 is equipped with a water outlet pipe 61. The outer diameter of the water outlet pipe 61 gradually decreases from top to bottom. A drain hole 62 is provided on the outer wall of the water outlet pipe 61. Water enters the accommodating cavity 21 through the drain hole 62. When the upper partition 2 is in a rotating state, the baffle 7 is tightly fitted with the sealing ring 23 under the support of the elastic support 8, thereby sealing the opening 22 and preventing materials from entering the accommodating cavity 21. When the upper partition 2 stops rotating and the material moisture content needs to be adjusted, the water pipe 6 is inserted into the opening 22 and pushes the baffle 7 away from the opening 22. At this time, the water outlet pipe 61 will enter the inner side of the accommodating cavity 21, so that the water can enter the accommodating cavity 21 through the drain hole 62 on the water outlet pipe 61.

[0027] The elastic support 8 includes a pair of bases 81. The top of each base 81 has a receiving groove 82. A spring 83 and a support rod 84 are located within the receiving groove 82. One end of the support rod 84 is connected to the bottom of the baffle 7, and the other end is connected to the spring 83. A pressure sensor 85 is located at the bottom of the receiving groove 82, inside the spring 83. The signal output of the pressure sensor 85 is connected to a controller, which controls the input of water. When the water pipe 6 is inserted into the opening 22 and pushes the baffle 7 to move, the support rod 84 moves towards the inside of the receiving groove 82, allowing the water pipe 61 to fully enter the receiving cavity 21. When the support rod 84 presses against the pressure sensor 85, the pressure signal collected by the pressure sensor 85 changes. After receiving and analyzing the value from the pressure sensor 85, the controller can input water into the water pipe 6. When the water pipe 6 is lifted, the pressure signal collected by the pressure sensor 85 changes. It will return to the initial state, and the water input will stop, ensuring that water will only be delivered from the water supply pipe 6 to the receiving cavity 21 when the water outlet pipe 61 is located inside the receiving cavity 21. Furthermore, when the water outlet pipe 61 and the water supply pipe 6 are pulled out of the opening 22, a small amount of water will overflow from the drain hole 62 and flow downward through the outer wall of the water outlet pipe 61. Since the outer diameter of the water outlet pipe 61 gradually decreases from top to bottom, the water will drip into the opening 22 instead of dripping onto the top of the upper partition 2, effectively preventing the water from overflowing everywhere.

[0028] The process for preparing recycled polyester staple fibers for heat-resistant nonwoven products includes the following steps: S1. Close valve 13 and feed material into tank 1 through feeding pipe 11; S2. Start the motor 5 and drive the main shaft 50 and the upper partition 2 to rotate. The upper partition 2 drives the stirring rod 4 and the lower partition 3 to rotate. S3. Turn off the motor 5, retract the push rod of the hydraulic cylinder 15 and drive the water pipe 6 to be inserted into the opening 22, and the water pipe 6 delivers water into the accommodating cavity 21. S4. Extend the push rod of the hydraulic cylinder 15 and drive the water pipe 6 to be pulled out from the opening 22; S5. Restart motor 5 and open valve 13 to output material downwards through discharge pipe 12.

[0029] In summary, these are merely preferred embodiments of the present invention and are not intended to limit the scope of the invention. All equivalent variations and modifications made in accordance with the shape, structure, features, and spirit of the claims of the present invention should be included within the scope of the claims of the present invention.

Claims

1. An apparatus for preparing recycled polyester staple fiber for heat-resistant nonwoven products, characterized in that: The device includes a tank for storing materials, a feeding pipe on one side of the tank, a discharge pipe at the bottom of the tank, and a valve on the discharge pipe; an agitation mechanism is provided inside the tank, the agitation mechanism includes an upper partition and a lower partition, the upper partition is flat, the lower partition is mesh-like, the upper partition and the lower partition are arranged in parallel, a plurality of agitating rods are provided between the upper partition and the lower partition, a motor and a main shaft are provided at the top of the tank, one end of the main shaft is connected to the output shaft of the motor, and the other end of the main shaft passes through the tank and is connected to the top of the upper partition; One end of the feeding pipe, which communicates with the tank body, is located between the upper partition and the lower partition. Several stirring rods are evenly spaced, with one end of each stirring rod connected to the bottom of the upper partition and the other end connected to the top of the lower partition. The upper partition has a receiving cavity, and each stirring rod has a cavity. The receiving cavity and the cavity are interconnected. Several water outlet holes are provided on the outer wall of each stirring rod, and the water outlet holes are connected to the cavities. A water supply pipe is provided at the top of the tank body for supplying water into the receiving cavity. The top of the tank is also provided with a hydraulic cylinder and a sleeve. The top of the upper partition is provided with an opening communicating with the accommodating cavity. One end of the sleeve is located above the tank, and the other end of the sleeve passes through the tank and extends to the inside of the tank. The water supply pipe passes through the sleeve, and the outer wall of the water supply pipe is in contact with the inner wall of the sleeve. The push rod of the hydraulic cylinder is connected to the outer wall of the water supply pipe. The hydraulic cylinder is used to drive the water supply pipe to be inserted into the opening or pulled out of the opening. The accommodating cavity is provided with a baffle and an elastic support. A sealing ring is provided on the inner wall of the accommodating cavity and on the outside of the opening. The elastic support supports the baffle and fits against the sealing ring. A water outlet is provided at the bottom of the water supply pipe. The outer diameter of the water outlet gradually decreases from top to bottom. A drain hole is provided on the outer wall of the water outlet. The water enters the accommodating cavity through the drain hole. The elastic support includes a pair of bases, with a receiving groove on the top of each base. A spring and a support rod are provided in the receiving groove. One end of the support rod is connected to the bottom of the baffle, and the other end of the support rod is connected to the spring. A pressure sensor is provided at the bottom of the receiving groove and inside the spring. The signal output terminal of the pressure sensor is connected to a controller, which is used to control the input of water.

2. The apparatus for preparing recycled polyester staple fiber for heat-resistant nonwoven products according to claim 1, characterized in that: The inner wall of the tank is also provided with a pair of clamping rings, and the inner wall of the clamping rings is provided with limiting grooves. The upper partition is adapted to be disposed in the limiting groove of one clamping ring, and the lower partition is adapted to be disposed in the limiting groove of the other clamping ring. Both the upper partition and the lower partition can rotate within the corresponding limiting grooves.

3. The apparatus for preparing recycled polyester staple fiber for heat-resistant nonwoven products according to claim 2, characterized in that: The inner wall of the limiting groove is provided with a graphite layer. The graphite layer in one limiting groove covers the portion of the upper partition plate located in the limiting groove, and the graphite layer in the other limiting groove covers the portion of the lower partition plate located in the limiting groove.

4. The apparatus for preparing recycled polyester staple fiber for heat-resistant nonwoven products according to claim 2, characterized in that: The outer wall of the stirring rod is separated from the inner wall of the clamping ring. The minimum distance between the outer wall of the stirring rod and the inner wall of the clamping ring is greater than the outer diameter of the material. The inner diameter of the mesh on the lower partition is greater than the outer diameter of the material.

5. The process of the apparatus for preparing recycled polyester staple fiber for heat-resistant nonwoven products according to claim 1, characterized in that, Includes the following steps: S1. Close the valve and feed the material into the tank through the feeding pipe; S2. Start the motor and drive the main shaft and the upper partition to rotate, and the upper partition drives the stirring rod and the lower partition to rotate; S3. Turn off the motor, retract the push rod of the hydraulic cylinder and drive the water pipe to be inserted into the opening, and the water pipe delivers water into the accommodating cavity; S4. Extend the push rod of the hydraulic cylinder and drive the water pipe to be pulled out of the opening; S5. Restart the motor and open the valve to output the material downward through the discharge pipe.

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