A waste edge recovery mechanism for a bi-directional stretching BOPET film production line

Abstract

The application relates to the technical field of thin film waste recovery, and discloses a two-way stretching BOPET thin film production line waste edge material recovery mechanism, which comprises a main body and a traction machine, and the back surface of the main body is fixedly connected with a fan. The waste material is in wavy swing instead of linear motion during conveying in the feeding pipe and the hose, at this time, the swing of the waste edge material can damage the contact layer between the waste edge material and the pipe wall of the feeding pipe or the hose, the waste edge material can be reduced in adhesion to the pipe wall through the swing flow in the feeding pipe and the hose, the waste edge material is subjected to greater friction force on one side, and the edge breakage occurs during conveying, the continuity of the equipment for waste edge material recovery and the stability during recovery are improved.

Description

Technical Field

[0001] This invention relates to the field of film waste recycling technology, specifically to a waste edge recycling mechanism for a biaxially oriented BOPET film production line. Background Technology

[0002] BOPET is an abbreviation for Biaxially Oriented Polyethylene Terephthalate Film, a high-performance polymer film material made from polyethylene terephthalate (PET) as the main raw material through processes such as melt extrusion, biaxial stretching (longitudinal + transverse) and heat setting. During BOPET film production, waste edge materials need to be recycled. During recycling, the end of the waste edge material is typically placed into a recycling pipe connected to a blower. The blower's suction force within the pipe transports the waste edge material to subsequent crushing equipment, completing the recycling process. To ensure continuous transport of the waste edge material within the pipe, it is straightened and fed into the recycling pipe at a uniform speed under the constraint of a traction machine. Because the waste edge material is extremely thin and light, and is limited by the traction machine at the pipe inlet, the negative pressure airflow during transport can easily cause it to slide against the pipe wall on one side. This results in significant friction on one side of the waste material, which, combined with the negative pressure pull, can cause edge breakage within the pipe, affecting the continuity and stability of the recycling equipment. Summary of the Invention

[0003] The purpose of this invention is to provide a waste material recycling mechanism for a biaxially oriented BOPET film production line to solve the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention relates to a waste material recycling mechanism for a biaxially oriented BOPET film production line, comprising a main body and a traction machine, with a fan fixedly connected to the back of the main body, and further comprising: The elastic mechanism is installed on the side wall of the main body to drive the waste material to swing up and down to avoid sticking to the pipe wall; The elastic mechanism includes two semicircular rings disposed on the side wall of the main body, with a long plate fixedly connected to the side wall of the semicircular rings, and two elastic plates fixedly connected between the two semicircular rings. An auxiliary mechanism is installed on the side wall of the elastic mechanism to prevent waste material from folding and piling up when it shakes. The auxiliary mechanism includes a movable frame set on the side wall of the elastic plate, and a bending spring is fixedly connected to the side wall of the movable frame.

[0005] Furthermore, the main body includes: The recycling pipe is installed at the top of the main body and is used to recycle waste materials. The limiting component is installed inside the recycling pipe.

[0006] Furthermore, the resilient mechanism also includes: The elastic component is installed on the side wall of the limiting component. The elastic component is in close contact with the waste material, which can ensure that the waste material can swing up and down during the conveying process.

[0007] Furthermore, the auxiliary mechanisms also include: The rotating component is installed on the side wall of the movable frame to limit excessive shaking of the elastic component and prevent waste material from hitting the pipe wall.

[0008] Furthermore, the recycling pipe includes a flexible tube fixedly connected to the top of the main body, with an intermediate tube fixedly connected to the end of the flexible tube away from the main body; The end of the intermediate tube furthest from the hose is bolted to the feed pipe. The blower is connected to the interior of the main body. When the blower is working, it will create a negative pressure suction force on the hose and feed pipe through the main body, causing the waste material to enter the interior of the main body through the feed pipe.

[0009] Furthermore, the limiting component includes a retaining ring fixedly connected inside the intermediate tube, and two limiting plates are fixedly connected to the side of the retaining ring near the hose; Two limiting springs are fixedly connected to the side of the fixed ring closest to the limiting plate; The long plate is slidably connected inside the limiting plate.

[0010] Furthermore, the end of the limiting spring away from the fixed ring is fixedly connected to the side wall of the semi-circular ring; The elastic component includes a fixed plate fixedly connected to the front and back of the elastic plate. An elastic sheet is fixedly connected to the side of the elastic plate near the fixed ring. The middle part of the elastic sheet is fixed to the elastic plate. The elastic sheet can perform elastic movement under the reaction force of the waste material when the elastic plate is in close contact with the waste material. The movable frame is slidably connected between two fixed plates.

[0011] Furthermore, the rotating assembly includes a spherical rod fixedly connected to the inner wall of the back of the movable frame.

[0012] Furthermore, a semi-circular plate is fixedly connected to the inner wall of the movable frame near the spherical rod; An auxiliary plate is rotatably connected to the outer surface of the spherical rod, and the top of the auxiliary plate is in contact with a bending spring; The semicircular plate can limit the rotation of the auxiliary plate, so that the auxiliary plate can only rotate downwards and diagonally downwards under the elastic action of the bending spring.

[0013] Furthermore, a spring plate is fixedly connected to the side of the movable frame away from the auxiliary plate, and a rotating ring is fixedly connected between the two spring plates. The rotating ring is rotatably connected inside the intermediate tube.

[0014] The present invention has the following beneficial effects: 1. This invention causes the waste material to no longer move in a straight line during the conveying process in the feed pipe and hose, but to oscillate in a wave-like manner. At this time, the oscillation of the waste material can break the contact layer between the waste material and the wall of the feed pipe or hose. Through the oscillating flow of the waste material in the feed pipe and hose, the conveying of the waste material adhering to the pipe wall can be reduced, which would cause it to be subjected to greater friction on one side, resulting in edge breakage during conveying. This improves the continuity and stability of the waste material recycling process of this equipment.

[0015] 2. The present invention, through the driving force formed by the airflow on both, can ensure the stability of the position of the elastic plate after sliding, and reduce the back-and-forth swaying of the elastic plate under the action of the limiting spring during the conveying of waste material and its own up-and-down swinging. Thus, it can ensure the stability of the position of the elastic plate after sliding with the semi-circular ring, while further enhancing the stability of the waste material conveyed by the negative pressure airflow.

[0016] 3. In this invention, when a strong airflow is flowing, the airflow will generate a driving force on the windward side of the auxiliary plate after operation. At this time, the auxiliary plate will drive the movable frame to slide. When the movable frame slides, it will limit the swing amplitude of the elastic plate, thereby reducing the excessive impact of the elastic plate and waste material on the pipe wall of the intermediate pipe and hose during the swing of the waste material. It also reduces the situation where the waste material is broken due to high-intensity impact friction and recycling stagnation when it is impacted and transported. This ensures stable transportation of waste material and further improves the integrity of waste material recycling.

[0017] 4. In this invention, when the tilted auxiliary plate is pushed by the airflow, the auxiliary plate will drive the movable frame and elastic plate to rotate with the continuous flow of the airflow. When the two rotate, they will drive the waste edge material on both sides to twist it. By twisting the waste edge material, it can prevent the long waste edge material from getting knotted and tangled in the pipe during the wave-like swinging process, thus preventing blockage in the pipe. This ensures the integrity of waste edge material recycling and improves the flow intensity and smoothness of the airflow driving the waste edge material recycling.

[0018] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall partial cross-sectional structure of the present invention; Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the elastic mechanism of the present invention; Figure 5 This is a schematic diagram of the explosion of the elastic component of the present invention; Figure 6 This is a partial cross-sectional schematic diagram of the auxiliary mechanism of the present invention; Figure 7 This is an exploded view of the rotating component of the present invention; Figure 8 This is a schematic diagram of the auxiliary mechanism of the present invention after movement; Figure 9 This is a planar schematic diagram of the motion state of the auxiliary mechanism of the present invention; Figure 10 This is a plan view of the elastic component of the present invention after movement.

[0021] The attached diagram lists the components represented by each number as follows: In the diagram: 1. Main body; 101. Fan; 11. Recovery pipe; 111. Hose; 112. Intermediate pipe; 113. Feed pipe; 12. Restriction component; 121. Fixing ring; 122. Limiting plate; 123. Limiting spring; 2. Elastic mechanism; 201. Semicircular ring; 21. Elastic component; 211. Elastic plate; 212. Fixing plate; 213. Elastic sheet; 3. Auxiliary mechanism; 301. Movable frame; 302. Bending spring; 31. Rotating component; 311. Ball rod; 312. Semicircular plate; 313. Auxiliary plate; 314. Rotating ring; 4. Traction machine. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 are within the scope of protection of the present invention.

[0023] Please see Figures 1-10 As shown, this invention is a waste material recycling mechanism for a biaxially oriented BOPET film production line, comprising a main body 1 and a traction machine 4. A fan 101 is fixedly connected to the back of the main body 1, and the invention also includes: Elastic mechanism 2 is installed on the side wall of the main body 1 to drive the waste edge material to swing up and down to avoid sticking to the pipe wall; The elastic mechanism 2 includes two semicircular rings 201 disposed on the side wall of the main body 1. A long plate is fixedly connected to the side wall of the semicircular rings 201, and two elastic plates 211 are fixedly connected between the two semicircular rings 201. Auxiliary mechanism 3 is installed on the side wall of elastic mechanism 2 to prevent waste material from folding and piling up when it shakes. The auxiliary mechanism 3 includes a movable frame 301 disposed on the side wall of the elastic plate 211, and a bending spring 302 is fixedly connected to the side wall of the movable frame 301.

[0024] Entity 1 includes: The recycling pipe 11 is installed on the top of the main body 1 and is used to recycle waste materials. Restriction component 12 is installed inside the recycling pipe 11.

[0025] The flexible mechanism 2 also includes: The elastic component 21 is installed on the side wall of the limiting component 12. The elastic component 21 is in close contact with the waste material, which can ensure that the waste material can swing up and down during the conveying process.

[0026] Auxiliary mechanism 3 also includes: Rotating component 31 is installed on the side wall of movable frame 301 to limit excessive shaking of elastic component 21 and prevent waste material from hitting the pipe wall.

[0027] The recycling pipe 11 includes a flexible hose 111 fixedly connected to the top of the main body 1, and an intermediate pipe 112 fixedly connected to the end of the flexible hose 111 away from the main body 1; The end of the intermediate tube 112 away from the hose 111 is bolted to the feed pipe 113. The blower 101 is connected to the interior of the main body 1. When the blower 101 is working, it will create a negative pressure suction force on the hose 111 and the feed pipe 113 through the main body 1, so that the waste material enters the interior of the main body 1 through the feed pipe 113. The waste film material output from the traction machine 4 is passed through the feed pipe 113, and then passed through the fixed ring 121, the two elastic plates 211 and the auxiliary plate 313 in sequence, and then through the middle of the rotating ring 314. The hose 111 and the intermediate pipe 112 are then connected and fixed.

[0028] The limiting component 12 includes a fixing ring 121 fixedly connected inside the intermediate tube 112, and two limiting plates 122 are fixedly connected to the side of the fixing ring 121 near the hose 111. Two limiting springs 123 are fixedly connected to the side of the fixing ring 121 near the limiting plate 122; The long plate is slidably connected inside the limiting plate 122.

[0029] The end of the limiting spring 123 away from the fixed ring 121 is fixedly connected to the side wall of the semi-circular ring 201; The elastic component 21 includes a fixed plate 212 fixedly connected to the front and back of the elastic plate 211. An elastic sheet 213 is fixedly connected to the side of the elastic plate 211 near the fixed ring 121. The middle part of the elastic sheet 213 is fixed to the elastic plate 211. The elastic sheet 213 can perform elastic movement under the reaction force of the waste material when the elastic plate 211 is in close contact with the waste material. The movable frame 301 is slidably connected between two fixed plates 212; When the scrap material passes between the two elastic plates 211, the two elastic plates 211 will clamp the scrap material on the upper and lower sides under their own elasticity, and make the elastic sheet 213 fit tightly against the side wall of the scrap material.

[0030] The rotating assembly 31 includes a spherical rod 311 that is fixedly connected to the inner wall of the back of the movable frame 301.

[0031] A semi-circular plate 312 is fixedly connected to the inner wall of the movable frame 301 near the spherical rod 311; An auxiliary plate 313 is rotatably connected to the outer surface of the ball rod 311, and the top of the auxiliary plate 313 is in contact with the bending spring 302; The semicircular plate 312 can limit the rotation of the auxiliary plate 313, so that the auxiliary plate 313 can only rotate downward and diagonally downward under the elastic action of the bending spring 302. When the auxiliary plate 313 rotates downward, a triangular angle will be formed between the auxiliary plate 313 and the movable frame 301. At this time, the side wall of the auxiliary plate 313 will form a large windward surface with the airflow direction. Then, when the airflow is flowing with a strong velocity, the airflow will generate a driving force through the windward surface of the auxiliary plate 313 after operation.

[0032] A spring plate is fixedly connected to the side of the movable frame 301 away from the auxiliary plate 313, and a rotating ring 314 is fixedly connected between the two spring plates. The rotating ring 314 is rotatably connected inside the intermediate tube 112. When the auxiliary plate 313 rotates obliquely downward under the pushing action of the bending spring 302, the oblique rotation of the auxiliary plate 313 will form an oblique state on the side wall of the waste material. At this time, the gas flowing in the pipe will exert a pushing force on the oblique surface of the auxiliary plate 313.

[0033] In use, the waste film material output from the traction machine 4 is passed through the feed pipe 113, and then passed through the fixed ring 121, the two elastic plates 211 and the auxiliary plate 313 in sequence, and then through the middle of the rotating ring 314. The hose 111 and the intermediate pipe 112 are connected and fixed. The air outlet of the blower 101 is connected to the external collection pipe. The blower 101 and the main body 1 are started. When the blower 101 is working, it will form a negative pressure suction force on the hose 111 and the feed pipe 113 through the main body 1. At this time, the waste material will be driven by the airflow and recycled into the main body 1 through the hose 111. When the main body 1 is working, it is crushed inside. Then the crushed waste material will be discharged to the external collection equipment through the blower 101, thus completing the purpose of recycling the waste material.

[0034] When the waste material passes between the two elastic plates 211, the two elastic plates 211 clamp the waste material on its upper and lower sides under their own elasticity, and the elastic sheet 213 is tightly attached to the side wall of the waste material. Then, when the negative pressure airflow draws in the waste material, the conveying of the waste material will pull the elastic plates 211 through the friction between the two elastic plates 211 and the elastic sheet 213. When the two elastic plates 211 are pulled, the pulling force on the two elastic plates 211 will be stretched through the semi-circular ring 201 and the limiting spring 123. Afterwards, when the waste material is conveyed with the negative pressure airflow, the waste material is conveyed between the two elastic plates 211 and the elastic sheet 213. The conveying mechanism causes the two elastic plates 211 to swing up and down under their own elastic force, creating a self-excited oscillation on the conveyed waste material. This causes the waste material to no longer move in a straight line during the conveying process in the feed pipe 113 and hose 111, but to swing in a wave-like manner. At this time, the swinging of the waste material can break the contact layer between the waste material and the wall of the feed pipe 113 or hose 111. Through the swinging flow of the waste material in the feed pipe 113 and hose 111, the conveying of the waste material adhering to the pipe wall can be reduced, which would cause it to be subjected to greater friction on one side, resulting in edge breakage during conveying. This improves the continuity and stability of the waste material recycling process.

[0035] When the two elastic plates 211 are tightly fitted together on the upper and lower sides of the scrap material, the elastic sheet 213 will move towards the elastic plate 211 on one side under the reaction force of the scrap material. At this time, an opening area with an angle will be formed between the end of the elastic sheet 213 and the elastic plate 211, presenting a... Figure 10As indicated by G, when a strong negative pressure airflow flows towards the main body 1 in the feed pipe 113, part of the airflow will flow to the opening between the elastic sheet 213 and the elastic plate 211. At this time, the airflow will generate a pushing force on the elastic sheet 213 and the elastic plate 211. The pushing force generated by the airflow on both can ensure the stability of the position of the elastic plate 211 after sliding, and reduce the back-and-forth swaying of the elastic plate 211 under the action of the limit spring 123 during the conveying of waste edge material and its own up-and-down swinging. This can ensure the stability of the position of the elastic plate 211 after sliding with the semi-circular ring 201, and further enhance the stability of the waste edge material conveyed with the negative pressure airflow.

[0036] When the elastic plate 211 slides under the pull of the waste material conveying, the sliding of the elastic plate 211 will cause the fixed plate 212 to slide to the large diameter of the sliding area between the movable frame 301 and the fixed plate 212. Then, when the elastic plate 211 drives the waste material to swing upward, the elastic plate 211 will drive the movable frame 301 to slide upward through the fixed plate 212. Since the waste material swings in a wave-like manner, the contact pressure between the waste material and the movable frame 301 will be greatly reduced. At this time, the auxiliary plate 313 inside the movable frame 301 will rotate downward under the push of the bending spring 302 after the waste material forms a wave shape, presenting a... Figure 8 China F and Figure 9 As indicated by C, when the auxiliary plate 313 rotates downwards, a triangular angle will be formed between the auxiliary plate 313 and the movable frame 301. At this time, the side wall of the auxiliary plate 313 will form a large windward surface with the airflow direction. Then, when the airflow is flowing with a strong velocity, the airflow will push the windward surface of the auxiliary plate 313 after it has been running. At this time, the auxiliary plate 313 will drive the movable frame 301 to slide. When the movable frame 301 slides, it will limit the swing amplitude of the elastic plate 211, thereby reducing the excessive impact of the elastic plate 211 and the waste material on the pipe wall of the intermediate pipe 112 and the hose 111 during the swinging process of the elastic plate 211. This reduces the situation where the waste material is broken due to high-intensity impact friction during the impact and conveying process, resulting in recycling stagnation. This ensures the stable conveying of waste material and further improves the integrity of the recycled waste material.

[0037] When the auxiliary plate 313 rotates obliquely downward under the pushing action of the bending spring 302, the oblique rotation of the auxiliary plate 313 will form an oblique state on the side wall of the waste material. At this time, the gas flowing in the pipe will exert a pushing force on the oblique surface of the auxiliary plate 313. When the oblique auxiliary plate 313 is pushed by the airflow, the auxiliary plate 313 will drive the movable frame 301 and the elastic plate 211 to rotate with the continuous flow of the airflow. When the two rotate, they will drive the waste material on both sides to twist. By twisting the waste material, it can prevent the long waste material from knotting and tangling in the pipe during the wave-like swinging process, thus preventing blockage in the pipe. This ensures the integrity of waste material recycling and improves the flow intensity and smoothness of the airflow driving the waste material recycling.

[0038] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A waste material recycling mechanism for a biaxially oriented BOPET film production line, comprising a main body (1) and a traction machine (4), wherein a fan (101) is fixedly connected to the back of the main body (1), characterized in that, Also includes: The elastic mechanism (2) is installed on the side wall of the main body (1) to drive the waste edge material to swing up and down to avoid sticking to the pipe wall; The elastic mechanism (2) includes two semicircular rings (201) disposed on the side wall of the main body (1). The side wall of the semicircular rings (201) is fixedly connected with a long plate, and two elastic plates (211) are fixedly connected between the two semicircular rings (201). Auxiliary mechanism (3) is installed on the side wall of elastic mechanism (2) to prevent waste material from folding and accumulating when it shakes. The auxiliary mechanism (3) includes a movable frame (301) disposed on the side wall of the elastic plate (211), and a bending spring (302) is fixedly connected to the side wall of the movable frame (301).

2. The waste material recycling mechanism for a biaxially oriented BOPET film production line according to claim 1, characterized in that: The main body (1) includes: A recycling pipe (11) is installed on the top of the main body (1) for recycling waste materials; A limiting component (12) is installed inside the recycling pipe (11).

3. The waste material recycling mechanism for a biaxially oriented BOPET film production line according to claim 2, characterized in that: The elastic mechanism (2) further includes: The elastic component (21) is installed on the side wall of the limiting component (12). The close contact between the elastic component (21) and the waste material ensures that the waste material can swing up and down during the conveying process.

4. The waste material recycling mechanism for a biaxially oriented BOPET film production line according to claim 3, characterized in that: The auxiliary mechanism (3) also includes: Rotating component (31) is installed on the side wall of the movable frame (301) to limit the excessive shaking of the elastic component (21) and prevent waste material from hitting the pipe wall.

5. The waste material recycling mechanism for a biaxially oriented BOPET film production line according to claim 4, characterized in that: The recycling pipe (11) includes a hose (111) fixedly connected to the top of the main body (1), and an intermediate pipe (112) is fixedly connected to one end of the hose (111) away from the main body (1). The intermediate tube (112) is bolted to the end away from the hose (111) with a feed tube (113).

6. The waste material recycling mechanism for a biaxially oriented BOPET film production line according to claim 5, characterized in that: The limiting component (12) includes a fixing ring (121) fixedly connected inside the intermediate tube (112), and two limiting plates (122) are fixedly connected to the side of the fixing ring (121) near the hose (111). Two limiting springs (123) are fixedly connected to the side of the fixed ring (121) near the limiting plate (122); The long plate is slidably connected inside the limiting plate (122).

7. The waste material recycling mechanism for a biaxially oriented BOPET film production line according to claim 6, characterized in that: The end of the limiting spring (123) away from the fixed ring (121) is fixedly connected to the side wall of the semi-circular ring (201); The elastic component (21) includes a fixing plate (212) fixedly connected to the front and back of the elastic plate (211), and an elastic sheet (213) is fixedly connected to the side of the elastic plate (211) near the fixing ring (121). The movable frame (301) is slidably connected between two fixed plates (212).

8. The waste material recycling mechanism for a biaxially oriented BOPET film production line according to claim 4, characterized in that: The rotating assembly (31) includes a spherical rod (311) fixedly connected to the inner wall of the back of the movable frame (301).

9. A waste material recycling mechanism for a biaxially oriented BOPET film production line according to claim 8, characterized in that: A semi-circular plate (312) is fixedly connected to the inner wall of the movable frame (301) near the spherical rod (311). An auxiliary plate (313) is rotatably connected to the outer surface of the spherical rod (311), and the top of the auxiliary plate (313) is in contact with the bending spring (302).

10. A waste material recycling mechanism for a biaxially oriented BOPET film production line according to claim 9, characterized in that: A spring plate is fixedly connected to the side of the movable frame (301) away from the auxiliary plate (313), and a rotating ring (314) is fixedly connected between the two spring plates. The rotating ring (314) is rotatably connected inside the intermediate tube (112).

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