A kind of polypropylene fiber heat treatment device and heat treatment method

Abstract

The invention relates to the field of heat treatment technology, and specifically to a polypropylene fiber heat treatment device and a heat treatment method, comprising: a shell, a heat treatment tank is provided inside the shell; a rotating ring, a preheating tube is arranged inside the rotating ring, a bottom plate is arranged inside the preheating tube, a through hole is provided on the surface of the bottom plate, a baffle is arranged in the through hole, a stirring rod and a groove are arranged on the surface of the baffle, and an arc plate is arranged inside the preheating tube; and a heating strip is arranged inside the heat treatment tank; the beneficial effect is: the stirring rod proposed by the invention makes the polypropylene inside the preheating tube evenly distributed inside the preheating tube, the preheating tube is away from the heating strip and can perform preheating treatment on the polypropylene, a small amount of polypropylene passes evenly between the rotating ring and the arc plate, the polypropylene can be evenly heated by the heating strip, and then after the polypropylene reaches the top of the arc plate, it falls to the top of the arc plate under the action of gravity, and slides from the top of the arc plate, and repeats the previous action again.

Description

Technical Field

[0001] The invention relates to the technical field of heat treatment, in particular to a polypropylene fiber heat treatment device and a heat treatment method. Background Art

[0002] Polypropylene = is a semi-crystalline thermoplastic. It has high impact resistance, strong mechanical properties, and resistance to a variety of organic solvents and acid and alkali corrosion. It is widely used in the industry and is one of the most common polymer materials.

[0003] Before the heat treatment of polypropylene, pretreatment is required to ensure the quality and performance of the material. The main purpose of pretreatment is to remove impurities and surface contaminants and improve the surface energy of the material so that it can better combine with other materials. The pretreatment steps include cleaning, dehumidification and preheating. First, the polypropylene material is soaked in the cleaning solution to remove dirt and impurities on the surface. Then, the material is placed in a dehumidification box to remove moisture to avoid bubbles and shrinkage holes during the heating process. Finally, the material is placed in a preheating furnace for preheating to improve the fluidity of the material and reduce thermal stress. After the pretreatment is completed, the material enters the heat treatment stage. The main purpose of heat treatment is to change the properties and structure of polypropylene and improve its strength and toughness. The heat treatment steps include heating, insulation and cooling. First, the polypropylene material is placed in a heat treatment furnace for heating to reach the required temperature. Then, the material is kept warm for a period of time to ensure its complete melting and rearrangement of the molecular chains. Finally, the material is cooled to solidify its new structure and properties;

[0004] However, the polypropylene needs to be separated for preheating and heat treatment, and when the polypropylene is heat treated, a large amount of polypropylene is piled up together, resulting in uneven heating of the polypropylene at various positions. Due to the accumulation of polypropylene, after stirring the polypropylene, a large amount of polypropylene is still piled up, and the problem of uneven heating cannot be solved. Summary of the invention

[0005] The object of the present invention is to provide a polypropylene fiber heat treatment device and a heat treatment method to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a polypropylene fiber heat treatment device, comprising:

[0007] A shell body, wherein a heat treatment tank is provided inside the shell body;

[0008] A rotating ring, a preheating tube is arranged inside the rotating ring, a bottom plate is arranged inside the preheating tube, a through hole is opened on the surface of the bottom plate, a baffle is arranged in the through hole, a stirring rod and a slot are arranged on the surface of the baffle, and an arc plate is arranged between the preheating tube and the rotating ring; and

[0009] The heating strip is arranged inside the heat treatment tank.

[0010] Preferably, a plurality of groups of heating strips are provided inside the heat treatment tank, and the heating strips are located on both sides and the bottom of the heat treatment tank. A rotating ring is located in the heat treatment tank. A motor is fixed on the surface of the shell, and the motor is connected to a gear. The gear is located inside the shell. A tooth is provided on the surface of one end of the rotating ring close to the motor. The tooth on the surface of the rotating ring meshes with the gear connected to the motor. The gear can drive the rotating ring to rotate, and the motor drives the gear to rotate.

[0011] Preferably, the preheating tube is fixed to the inner wall of the shell, a feed port is provided at the end of the preheating tube, the bottom plate is fixed to the bottom of the preheating tube, the baffle is located inside the bottom plate, and the baffle can move laterally inside the bottom plate, the end of the baffle is connected to a cylinder, the cylinder pushes the baffle to move inside the bottom plate, a groove is provided on the surface of the baffle, the groove moves with the baffle, a stirring rod is fixed on the surface of the baffle, the stirring rod moves with the baffle, and a slide groove is provided on the surface of the bottom plate, when the stirring rod moves with the baffle, the stirring rod moves into the slide groove.

[0012] Preferably, when the slot moves to the inside of the bottom plate, the baffle shields the through hole on the surface of the bottom plate, and when the slot moves to the position of the through hole, the inside of the preheating tube is connected with the inside of the rotating ring through the slot and the through hole.

[0013] Preferably, the inner wall of the rotating ring is provided with multiple groups of convex strips, which rotate with the rotating ring, a first rotating shaft is provided inside the rotating ring, the end of the first rotating shaft is connected to a motor, the motor drives the first rotating shaft to rotate, a sweeping brush is provided on the surface of the first rotating shaft, the sweeping brush is made of high temperature resistant material, the sweeping brush rotates with the first rotating shaft, the sweeping brush is elastic, an arc plate is fixed inside the rotating ring, multiple groups of extension strips are fixed on the surface of the arc plate, and the distance between the arc plate and the rotating ring gradually decreases from bottom to top.

[0014] Preferably, an arc-shaped groove is provided on the surface of the arc-shaped plate, a second rotating shaft is arranged in the arc-shaped groove, a motor is connected to the end of the second rotating shaft, the motor drives the second rotating shaft to rotate, and a force bar is fixed to the inner wall of the arc-shaped groove, and a plurality of groups of force bars are arranged.

[0015] Preferably, a push plate is fixed to the surface of the second rotating shaft, and multiple groups of push plates are provided. A plug-in slot is opened on the surface of the push plate, and a plug-in plate is plugged into the plug-in slot. A spring is provided inside the plug-in slot, one end of the spring is connected to the end of the plug-in plate, and the other end is connected to the inner wall of the plug-in slot. The plug-in plate can enter the plug-in slot and extend to the outside of the plug-in slot.

[0016] Preferably, the push plate and the plug-in plate rotate along with the second rotating shaft, and the plug-in plate is supported on the surface of the force-bearing bar after rotation, and the plug-in plate is received into the inside of the plug-in slot after being supported by the force-bearing bar.

[0017] Preferably, the polypropylene is fed into the interior of the preheating tube from a feed port, and the heating strip heats the polypropylene.

[0018] A heat treatment method of a polypropylene fiber heat treatment device comprises the following steps:

[0019] Step 1: Preheating, put polypropylene into the preheating tube through the feed port, the end of the baffle is connected to a cylinder, the cylinder pushes the baffle to move the baffle, the groove on the surface of the baffle moves to the inside of the bottom plate, so that the baffle covers the through hole, so that the polypropylene stays in the preheating tube, the baffle is driven by the cylinder to move back and forth, so that the groove is always inside the bottom plate, the stirring rod moves back and forth with the baffle, the stirring rod makes the polypropylene inside the preheating tube evenly distributed inside the preheating tube, and the preheating tube is away from the heating strip to preheat the polypropylene;

[0020] Step 2: Heating, the baffle is driven by the cylinder to move, so that the slot moves to the position of the through hole, and the polypropylene inside the preheating tube falls from the through hole and the slot to the inside of the rotating ring. The end surface of the rotating ring is provided with teeth, and the motor is connected to the gear. The gear meshes with the teeth on the end surface of the rotating ring. The rotating ring can be driven to rotate by the motor. After the rotating ring rotates, the polypropylene is driven to move by the convex strips on the inner wall of the rotating ring. The polypropylene moves with the push of the convex strips. The polypropylene moves between the rotating ring and the arc plate. The distance between the rotating ring and the arc plate gradually decreases, and the thickness of the polypropylene is gradually reduced. A second rotating shaft is provided on the surface of the arc plate, and a driving device is connected to the end of the second rotating shaft. The driving device drives the second rotating shaft to rotate. During the rotation of the second rotating shaft, the pushing plate and the plug-in plate on the surface of the second rotating shaft can push the polypropylene to prevent a large amount of polypropylene from being squeezed between the rotating ring and the arc plate, so that a small amount of polypropylene passes evenly between the rotating ring and the arc plate, and the polypropylene can be evenly heated by the heating strip.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The stirring rod proposed in the present invention makes the polypropylene inside the preheating tube evenly distributed inside the preheating tube. The preheating tube is far away from the heating strip and the polypropylene can be preheated. A small amount of polypropylene passes evenly between the rotating ring and the arc plate. The heating strip can make the polypropylene evenly heated. After the polypropylene reaches the top of the arc plate, it falls to the top of the arc plate under the action of gravity and slides from the top of the arc plate, repeating the previous action again. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0024] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention.

[0025] Figure 3 It is a schematic structural diagram of another viewing angle of the cross section of the present invention.

[0026] Figure 4 for Figure 2 A schematic diagram of the enlarged structure in the middle.

[0027] Figure 5 for Figure 3 Enlarged schematic diagram of the structure at point B in the middle.

[0028] Figure 6 It is a schematic diagram of the arc plate structure of the present invention.

[0029] Figure 7 for Figure 6 Enlarged schematic diagram of the structure at point C in the middle.

[0030] In the figure: shell 1, heat treatment tank 2, heating strip 3, rotating ring 4, preheating tube 5, motor 6, feed port 7, bottom plate 8, through hole 9, stirring rod 10, slide groove 11, baffle 12, slot 13, sweeping brush 14, first rotating shaft 15, convex strip 16, arc plate 17, extension strip 18, force strip 19, second rotating shaft 20, push plate 21, plug-in plate 22, plug-in groove 23, arc groove 24. DETAILED DESCRIPTION

[0031] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figures 1 to 7 , the present invention provides a technical solution:

[0033] Embodiment 1: A polypropylene fiber heat treatment device comprises: a shell 1, a heat treatment tank 2 is provided inside the shell 1; a rotating ring 4, a preheating tube 5 is arranged inside the rotating ring 4, a bottom plate 8 is arranged inside the preheating tube 5, a through hole 9 is provided on the surface of the bottom plate 8, a baffle 12 is provided in the through hole 9, a stirring rod 10 and a groove 13 are provided on the surface of the baffle 12, and an arc plate 17 is provided between the preheating tube 5 and the rotating ring 4; and a heating strip 3, which is arranged inside the heat treatment tank 2, the preheating tube 5 is fixed to the inner wall of the shell 1, a feed port 7 is provided at the end of the preheating tube 5, the bottom plate 8 is fixed to the bottom of the preheating tube 5, the baffle 12 is located inside the bottom plate 8, and the baffle 12 can move laterally inside the bottom plate 8, and a cylinder is connected to the end of the baffle 12, and the cylinder pushes the baffle 12 to move inside the bottom plate 8.

[0034] Embodiment 2: A plurality of groups of heating strips 3 are arranged inside the heat treatment tank 2, and the heating strips 3 are located on both sides and the bottom of the heat treatment tank 2. The rotating ring 4 is located in the heat treatment tank 2. A motor 6 is fixed on the surface of the shell 1, and the motor 6 is connected to a gear. The gear is located inside the shell 1. A tooth is arranged on the surface of the rotating ring 4 near the motor 6. The tooth on the surface of the rotating ring 4 meshes with the gear connected to the motor 6. The gear can drive the rotating ring 4 to rotate. The motor 6 drives the gear to rotate. A plurality of groups of convex strips 16 are arranged on the inner wall of the rotating ring 4. The convex strips 16 rotate with the rotation of the motor 6. The rotating ring 4 rotates, and a first rotating shaft 15 is arranged inside the rotating ring 4. A motor is connected to the end of the first rotating shaft 15. The motor drives the first rotating shaft 15 to rotate. A sweeping brush 14 is arranged on the surface of the first rotating shaft 15. The sweeping brush 14 is made of high temperature resistant material. The sweeping brush 14 rotates with the first rotating shaft 15. The sweeping brush 14 has elasticity. An arc plate 17 is fixed inside the rotating ring 4. A plurality of extension strips 18 are fixed on the surface of the arc plate 17. The distance between the arc plate 17 and the rotating ring 4 gradually decreases from bottom to top. The surface is provided with an arc groove 24, in which a second rotating shaft 20 is arranged, and a motor is connected to the end of the second rotating shaft 20, and the motor drives the second rotating shaft 20 to rotate, and a force bar 19 is fixed to the inner wall of the arc groove 24, and a plurality of groups of force bars 19 are arranged, and a push plate 21 is fixed to the surface of the second rotating shaft 20, and a plurality of groups of push plates 21 are arranged, and a plug-in groove 23 is provided on the surface of the push plate 21, and a plug-in plate 22 is plugged into the plug-in groove 23, and a spring is arranged inside the plug-in groove 23, and one end of the spring is connected to the end of the plug-in plate 22, and the other end of the spring is connected to the end of the plug-in plate 22. One end is connected to the inner wall of the plug-in slot 23, and the plug-in board 22 can enter the plug-in slot 23 and extend to the outside of the plug-in slot 23. The push plate 21 and the plug-in board 22 rotate along with the second rotating shaft 20. After the plug-in board 22 rotates, it is supported on the surface of the force-bearing bar 19. After being supported by the force-bearing bar 19, the plug-in board 22 is received into the inside of the plug-in slot 23. After the plug-in board 22 rotates along with the second rotating shaft 20, it will be supported on the surface of the force-bearing bar 19 on the surface of the arc groove 24, causing the arc plate 17 to vibrate, making it easier for polypropylene to fall from the surface of the arc plate 17.

[0035] The preheating tube 5 is fixed to the inner wall of the shell 1, and a feed port 7 is provided at the end of the preheating tube 5. The bottom plate 8 is fixed to the bottom of the preheating tube 5. The baffle 12 is located inside the bottom plate 8, and the baffle 12 can move laterally inside the bottom plate 8. The end of the baffle 12 is connected to a cylinder, and the cylinder pushes the baffle 12 to move inside the bottom plate 8. A groove 13 is provided on the surface of the baffle 12, and the groove 13 moves with the baffle 12. A stirring rod 10 is fixed on the surface of the baffle 12, and the stirring rod 10 moves with the baffle 12. A slide groove 11 is provided on the surface of the bottom plate 8, and when the stirring rod 10 moves with the baffle 12, the stirring rod 10 moves into the slide groove 11.

[0036] When the slot 13 moves to the inside of the bottom plate 8, the baffle 12 covers the through hole 9 on the surface of the bottom plate 8. When the slot 13 moves to the position of the through hole 9, the inside of the preheating tube 5 is connected with the inside of the rotating ring 4 through the slot 13 and the through hole 9.

[0037] The polypropylene is put into the preheating tube 5 through the feed port 7. The end of the baffle 12 is connected to a cylinder. The cylinder pushes the baffle 12 to move the baffle 12. The groove 13 on the surface of the baffle 12 moves to the inside of the bottom plate 8, so that the baffle 12 covers the through hole 9, so that the polypropylene stays in the preheating tube 5. The baffle 12 is driven by the cylinder to move back and forth, so that the groove 13 is always inside the bottom plate 8. The stirring rod 10 moves back and forth with the baffle 12. The stirring rod 10 makes the polypropylene inside the preheating tube 5 evenly distributed in the preheating tube 5. The interior of the tube 5 is preheated, and the preheating tube 5 is away from the heating strip 3 to preheat the polypropylene. The baffle 12 is driven by the cylinder to move, so that the slot 13 moves to the position of the through hole 9, and the polypropylene inside the preheating tube 5 falls from the through hole 9 and the slot 13 to the inside of the rotating ring 4. The end surface of the rotating ring 4 is provided with teeth, and the motor 6 is connected to the gear. The gear meshes with the teeth on the end surface of the rotating ring 4. The rotating ring 4 can be driven to rotate by the motor 6. After the rotating ring 4 rotates, the polypropylene is driven to move through the convex strips 16 on the inner wall of the rotating ring 4. The polypropylene moves with the push of the convex strip 16, and the polypropylene moves between the rotating ring 4 and the arc plate 17. The distance between the rotating ring 4 and the arc plate 17 gradually decreases, and the thickness of the polypropylene is gradually reduced. A second rotating shaft 20 is provided on the surface of the arc plate 17. The end of the second rotating shaft 20 is connected to a driving device, and the driving device drives the second rotating shaft 20 to rotate. During the rotation of the second rotating shaft 20, the pushing plate 21 and the plugging plate 22 on the surface of the second rotating shaft 20 can push the polypropylene to prevent a large amount of polypropylene from being squeezed on the rotating ring. 4 and the curved plate 17, so that a small amount of polypropylene passes evenly between the rotating ring 4 and the curved plate 17, and the polypropylene can be evenly heated by the heating strip 3. Then, after the polypropylene reaches the top of the curved plate 17, it falls to the top of the curved plate 17 under the action of gravity and slides down from the top of the curved plate 17, repeating the previous action again, and the plug-in board 22 will be supported on the surface of the force strip 19 on the surface of the arc groove 24 after the second rotating shaft 20 rotates, so that the curved plate 17 vibrates, which facilitates the polypropylene to fall from the surface of the curved plate 17.

[0038] Although the above describes the illustrative specific implementation methods of the present application so that technicians in this technical field can understand the present application, the present application is not limited to the scope of the specific implementation methods. For ordinary technicians in this technical field, as long as various changes are within the spirit and scope of the present application defined and determined by the attached claims, all application creations using the concept of the present application are protected.

Claims

1. A polypropylene fiber heat treatment device, characterized in that: include: A shell (1), wherein a heat treatment tank (2) is provided inside the shell (1); A rotating ring (4), a preheating tube (5) is arranged inside the rotating ring (4), a bottom plate (8) is arranged inside the preheating tube (5), a through hole (9) is opened on the surface of the bottom plate (8), a baffle (12) is arranged in the through hole (9), a stirring rod (10) and a groove (13) are arranged on the surface of the baffle (12), and an arc plate (17) is arranged between the preheating tube (5) and the rotating ring (4); and The heating strip (3) is arranged inside the heat treatment tank (2), the preheating tube (5) is fixed to the inner wall of the shell (1), the end of the preheating tube (5) is provided with a feed port (7), the bottom plate (8) is fixed to the bottom of the preheating tube (5), the baffle (12) is located inside the bottom plate (8), and the baffle (12) can move laterally inside the bottom plate (8), the end of the baffle (12) is connected to a cylinder, and the cylinder pushes the baffle (12) to move inside the bottom plate (8), and the baffle (12) is arranged to move inside the bottom plate (8). The surface of the bottom plate (8) is provided with a groove (13), the groove (13) moves with the baffle (12), a stirring rod (10) is fixed on the surface of the baffle (12), the stirring rod (10) moves with the baffle (12), and a sliding groove (11) is provided on the surface of the bottom plate (8), when the stirring rod (10) moves with the baffle (12), the stirring rod (10) moves into the sliding groove (11), and the inner wall of the rotating ring (4) is provided with a plurality of groups of convex strips (16), the convex strips (16) As the rotating ring (4) rotates, a first rotating shaft (15) is arranged inside the rotating ring (4), an end of the first rotating shaft (15) is connected to a motor, the motor drives the first rotating shaft (15) to rotate, a sweeping brush (14) is arranged on the surface of the first rotating shaft (15), the sweeping brush (14) is made of a high temperature resistant material, the sweeping brush (14) rotates along with the first rotating shaft (15), the sweeping brush (14) is elastic, and an arc plate (17) is fixed inside the rotating ring (4). A plurality of groups of extension strips (18) are fixed on the surface of the arc plate (17), and the distance between the arc plate (17) and the rotating ring (4) gradually decreases from bottom to top. An arc groove (24) is provided on the surface of the arc plate (17), and a second rotating shaft (20) is provided in the arc groove (24). An end of the second rotating shaft (20) is connected to a motor, and the motor drives the second rotating shaft (20) to rotate. A force strip (19) is fixed on the inner wall of the arc groove (24), and a plurality of groups of force strips (19) are provided.

2. A polypropylene fiber heat treatment device according to claim 1, characterized in that: A plurality of groups of heating strips (3) are arranged inside the heat treatment tank (2), the heating strips (3) are located on both sides and the bottom of the heat treatment tank (2), the rotating ring (4) is located in the heat treatment tank (2), a motor (6) is fixed on the surface of the shell (1), the motor (6) is connected to a gear, the gear is located inside the shell (1), and teeth are arranged on the surface of one end of the rotating ring (4) close to the motor (6), the teeth on the surface of the rotating ring (4) mesh with the gear connected to the motor (6), the gear can drive the rotating ring (4) to rotate, and the motor (6) drives the gear to rotate.

3. A polypropylene fiber heat treatment device according to claim 2, characterized in that: When the slot (13) moves to the inside of the bottom plate (8), the baffle (12) shields the through hole (9) on the surface of the bottom plate (8); when the slot (13) moves to the position of the through hole (9), the inside of the preheating tube (5) communicates with the inside of the rotating ring (4) through the slot (13) and the through hole (9).

4. A polypropylene fiber heat treatment device according to claim 3, characterized in that: A push plate (21) is fixed to the surface of the second rotating shaft (20), and a plurality of push plates (21) are provided. A plug-in slot (23) is provided on the surface of the push plate (21), and a plug-in plate (22) is plugged into the plug-in slot (23). A spring is provided inside the plug-in slot (23), and one end of the spring is connected to an end of the plug-in plate (22), and the other end is connected to an inner wall of the plug-in slot (23). The plug-in plate (22) can enter the plug-in slot (23) and extend to the outside of the plug-in slot (23).

5. A polypropylene fiber heat treatment device according to claim 4, characterized in that: The push plate (21) and the plug plate (22) rotate along with the second rotating shaft (20). After the plug plate (22) rotates, it is supported on the surface of the force-bearing bar (19). After being supported by the force-bearing bar (19), the plug plate (22) is received in the plug slot (23).

6. A polypropylene fiber heat treatment device according to claim 5, characterized in that: The polypropylene is fed into the interior of the preheating tube (5) from the feed port (7), and the heating strip (3) heats the polypropylene.

7. A heat treatment method of the polypropylene fiber heat treatment device according to claim 6, characterized in that: The following steps are involved: Step 1: preheating, polypropylene is placed into the preheating tube (5) through the feed port (7), the end of the baffle (12) is connected to a cylinder, the cylinder pushes the baffle (12) to move the baffle (12), and the groove (13) on the surface of the baffle (12) moves to the inside of the bottom plate (8), so that the baffle (12) covers the through hole (9), so that the polypropylene stays in the preheating tube (5), and the baffle (12) is driven by the cylinder to move back and forth, so that the groove (13) is always in the inside of the bottom plate (8), and the stirring rod (10) moves back and forth with the baffle (12), and the stirring rod (10) makes the polypropylene in the preheating tube (5) evenly distributed in the preheating tube (5), and the preheating tube (5) is away from the heating strip (3) to perform preheating treatment on the polypropylene; Step 2: heating, the baffle (12) is driven by the cylinder to move, so that the slot (13) moves to the position of the through hole (9), and the polypropylene inside the preheating tube (5) falls from the through hole (9) and the slot (13) to the inside of the rotating ring (4), the end surface of the rotating ring (4) is provided with teeth, the motor (6) is connected to the gear, the gear is meshed with the teeth on the end surface of the rotating ring (4), and the rotating ring (4) can be driven to rotate by the motor (6). After the rotating ring (4) rotates, the polypropylene is driven to move by the convex strip (16) on the inner wall of the rotating ring (4), and the polypropylene moves with the push of the convex strip (16), and the polypropylene moves to the rotating ring (4) and the arc plate (17). ), the distance between the rotating ring (4) and the arc plate (17) gradually decreases, the thickness of the polypropylene is gradually reduced, and a second rotating shaft (20) is provided on the surface of the arc plate (17), the end of the second rotating shaft (20) is connected to a driving device, the driving device drives the second rotating shaft (20) to rotate, during the rotation of the second rotating shaft (20), the pushing plate (21) and the plug-in plate (22) on the surface of the second rotating shaft (20) can push the polypropylene, prevent a large amount of polypropylene from being squeezed between the rotating ring (4) and the arc plate (17), so that a small amount of polypropylene passes evenly between the rotating ring (4) and the arc plate (17), and the polypropylene can be evenly heated by the heating strip (3).

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