Cooling device for PE wrapping film production

Abstract

The invention discloses a cooling device for PE wrapping film production, which comprises a rolling platform, a rolling mechanism and a cooling mechanism are respectively mounted on the rolling platform, a limiting mechanism is arranged between the cooling mechanism and the rolling mechanism, and a semiconductor refrigeration low-temperature cavity is combined with a rotary air cooling ring to cool a PE wrapping film. The whole heat energy of the thin film is rapidly absorbed, ordered crystallization of molecular chains is promoted, the rotary air cooling ring limited by the roller and driven by the driving wheel forms uniform and dead-corner-free forced convection on the surface of the thin film, a heat boundary layer of static cooling is thoroughly broken, the cooling efficiency and uniformity are effectively improved, double effects are achieved, and the service life of the thin film is prolonged. The film is uniformly cured in a short time, so that excellent transparency, strength and dimensional stability are obtained, the movable roller capable of swinging freely automatically adjusts the angle according to the change of the winding diameter, and tension constancy and wrap angle stability of a film transmission path are dynamically maintained.

Description

Technical Field

[0001] This invention relates to the field of PE stretch film production technology, specifically a cooling device for PE stretch film production. Background Technology

[0002] PE stretch film is an industrial stretch film made primarily of polyethylene. It features high elasticity, self-adhesion, and puncture resistance, and is widely used for securing pallets. The cooling device is a crucial piece of equipment on the stretch film production line, located after the extrusion blow molding or casting process. Its core function is to rapidly and uniformly cool and shape the high-temperature molten PE film that has just been extruded from the die and blown into a bubble (or cast into a film). Cooling is necessary because the PE molecular chains are in a disordered state at high temperatures. If not solidified and shaped in time, the film will sag under its own weight, leading to uneven thickness, surface stickiness, or even cracking. Forced cooling can quickly lower the film temperature below the glass transition temperature, freezing and orderly arranging the molecular chains. This stabilizes the bubble size, improves the film's transparency, mechanical strength, and dimensional stability, ensuring subsequent winding and performance.

[0003] In the prior art, publication number "CN215930261U" discloses a cooling device for PE stretch film production, including a box body. A cooling frame is provided on the inner top wall of the box body. A stirring assembly extending into the cooling frame and rotatably connected to its inner bottom wall is provided on the top of the box body. A cooling pipe extending into the box body, wound around the outside of the cooling frame, and extending to the rear of the box body is provided on the top of the box body. This cooling device for PE stretch film production, through the setting of a cooling mechanism, activates a servo motor to drive a rotating rod to rotate, causing the turntable and the first winding drum to rotate accordingly. Driven by two belts, two threaded rods rotate simultaneously, causing the outer threaded block to move up and down under the support of a rectangular plate. The rotation of the turntable allows two cooling fans to rotate around the periphery of the cooling frame, ensuring uniform cooling. The up-and-down movement of the two cooling fans expands the airflow range, achieving the goal of uniform and efficient cooling.

[0004] However, existing technologies still have significant shortcomings, such as: In the aforementioned devices and existing technologies, the cooling and winding equipment in traditional PE stretch film production cooling devices are usually arranged separately, resulting in a long production line, low space utilization, and poor process connection. Cooling often relies on a single static air-cooled or water-cooled roller, which has low cooling efficiency and is prone to local temperature differences in the film due to the formation of a thermal boundary layer, affecting the uniformity of crystallization and the mechanical properties of the product. At the same time, the winding section often causes tension fluctuations and uneven winding problems because the fixed guide rollers cannot adapt to changes in roll diameter, ultimately affecting the continuity of production and the stability of finished product quality. Summary of the Invention

[0005] The purpose of this invention is to provide a cooling device for the production of PE stretch film, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a cooling device for the production of PE stretch film, comprising a winding platform, wherein a winding mechanism and a cooling mechanism are respectively installed on the winding platform, and a limiting mechanism is provided between the cooling mechanism and the winding mechanism; The winding mechanism includes a roller and a winding drum, with the winding drum sleeved on the surface of the roller. The cooling mechanism includes a cold box, and an air-cooling ring is installed inside the cold box; The limiting mechanism includes a limiting roller and a swing bracket. The limiting roller is located on both sides of the cold box, and the swing bracket is located between the cold box and the take-up drum.

[0007] Preferably, one end surface of the roller shaft is provided with a threaded section, and a locking sleeve is threadedly connected to the threaded section, and the locking sleeve abuts against one end of the winding drum.

[0008] Preferably, the air-cooling ring is circular, and the air-cooling ring is mainly located at the center of the cold box, and the air-cooling ring is movably connected to the cold box.

[0009] Preferably, the inner wall of the air-cooling ring is arrayed with fans, and the PE film is located at the center of the air-cooling ring.

[0010] Preferably, the top and bottom portions inside the cold box are respectively fixed with connecting seats, and the connecting seats are provided with rollers, and the rollers are in contact with the surface of the air-cooling ring.

[0011] Preferably, the rollers are located in the connecting seat in a V-shape, and the air-cooling ring is located between the rollers at both ends.

[0012] Preferably, the cold box is equipped with a drive wheel, which is located near the side of the air-cooling ring and engages with the surface of the air-cooling ring.

[0013] Preferably, one end of the drive wheel is connected to a connecting rod, a drive motor is connected to the outside of the cold box, and gears are connected to the rotating ends of the connecting rod and the drive motor, and the two gears mesh with each other.

[0014] Preferably, there are two sets of limiting rollers, and each set of limiting rollers is symmetrically distributed vertically, with the PE film passing between the upper and lower limiting rollers. Inlet and outlet clamps are fixed at the inlet and outlet positions on both sides of the cold box.

[0015] Preferably, the swing bracket is U-shaped, and one end of the swing bracket is axially connected to one side of the winding platform. A movable roller is installed in the U-shaped groove of the swing bracket.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. The winding function is directly integrated into the cooling platform. Through the simple cooperation of the threaded shaft and the locking sleeve, the winding drum can be quickly clamped and disassembled. The self-locking principle of the thread ensures that the winding drum is absolutely fixed during high-speed rotation, avoiding the cumbersome operation of traditional keyway or bolt fixing. A single person can complete the drum change in a few seconds, which greatly improves production efficiency and reduces labor intensity. At the same time, the compact integrated design saves production line space and makes the cooling and winding processes seamlessly connected.

[0017] 2. By combining a semiconductor cooling low-temperature chamber with a rotating air-cooling ring, the semiconductor cooling provides a stable and controllable low-temperature environment, allowing the overall thermal energy of the film to be rapidly absorbed, promoting the orderly crystallization of molecular chains. Meanwhile, the rotating air-cooling ring, limited by rollers and driven by a drive wheel, forms uniform and dead-angle-free forced convection on the film surface, completely breaking the thermal boundary layer of static cooling, effectively improving cooling efficiency and uniformity. This dual effect ensures that the film completes uniform curing in a short time, thereby obtaining excellent transparency, strength, and dimensional stability.

[0018] 3. By cooperating with the symmetrical limiting rollers at the inlet and outlet and the triangular inlet and outlet clamps, the film is physically forced to be flat and centered through the narrow channel of the cold box, effectively preventing film deviation, wrinkles, and internal and external air exchange. The freely swinging movable roller automatically adjusts its angle according to the change of the winding diameter, dynamically maintaining constant tension and stable wrap angle of the film transmission path, eliminating quality defects caused by film shaking, sudden path changes, or uneven tension, and ensuring the continuity of the production process and the flatness of the finished film roll. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall device of the present invention; Figure 2 This is a schematic diagram of the transmission arm portion in this invention; Figure 3 In this invention Figure 2 Enlarged view of part A; Figure 4 In this invention Figure 2 Enlarged view of part B; Figure 5 This is a schematic diagram of the air inlet portion in this invention; Figure 6 This is a cross-sectional view of the device of the present invention; Figure 7 This is a schematic diagram of the intake pipe section in this invention; Figure 8 This is a schematic diagram of the first and third transmission wheels in this invention.

[0020] In the diagram: 1. Winding platform; 2. Winding mechanism; 21. Roller; 22. Winding drum; 23. Threaded section; 24. Locking sleeve; 3. Cooling mechanism; 31. Cold box; 32. Air-cooled ring; 33. Fan; 34. Connecting seat; 35. Roller; 36. Drive wheel; 4. Connecting rod; 5. Gear; 6. Drive motor; 7. Limiting mechanism; 71. Limiting roller; 72. Inlet / outlet clamp; 73. Swinging bracket; 74. Movable roller; Detailed Implementation

[0021] 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.

[0022] Please see Figure 1-8 The present invention provides a technical solution: Example 1: A cooling device for PE stretch film production: It includes a winding platform 1, on which a winding mechanism 2 and a cooling mechanism 3 are respectively installed. A limiting mechanism 7 is provided between the cooling mechanism 3 and the winding mechanism 2. The cooling device is mainly used to cool the PE film after it is formed but before it is wound up. The molten PE molecular chains are in a chaotic, high-energy state. If forced cooling is not used to rapidly reduce its temperature below the glass transition temperature, the molecular chains will not be able to freeze and arrange themselves in time, resulting in uneven thickness, sticky surface, or even cracking of the film due to its own weight. Furthermore, the film has extremely low physical strength and cannot be wound up. Through efficient cooling... Cooling not only instantly shapes the film bubble or cast film and stabilizes its size, but also induces the formation of a uniform microcrystalline structure, thereby significantly improving the film's transparency, tensile strength, puncture resistance, and dimensional stability. This ensures the smooth progress of subsequent slitting and winding processes, and ultimately guarantees the mechanical properties and packaging reliability of the stretch film during use. The winding platform 1 includes a winding mechanism 2, a cooling mechanism 3, and a limiting mechanism 7, allowing the PE film to be limited and wound on the same device and forcibly cooled before winding. Multiple functions are integrated into one device, eliminating the need for additional equipment. It has a small footprint and is easy to operate.

[0023] The winding mechanism 2 includes a roller and a winding drum 22. The winding drum 22 is sleeved on the surface of the roller shaft 21. Specifically, the winding drum 22 in the winding mechanism 2 is sleeved on the surface of the roller shaft 21 and fixed by a locking sleeve 24. The roller shaft 21 is driven to rotate by a motor, thereby driving the winding drum 22 on the surface to move. At this time, the PE film fixed on the surface of the winding drum 22 is wound around the surface of the winding drum 22 under the action of rotation. One end of the roller shaft 21 is provided with a threaded section 23, and a locking sleeve 24 is threadedly connected to the threaded section 23. The locking sleeve 24 abuts against one end of the winding drum 22. It should be noted that the roller shaft One section of 21 is a threaded section 23. The locking sleeve 24, which mates with it, can be threadedly connected to the threaded section 23 in this part. The surface of the locking sleeve 24 includes multiple handle parts for easy rotation by the operator. In summary, when installing the take-up drum 22, simply remove the locking sleeve 24, fit the take-up drum 22 onto the surface of the roller shaft 21, and push it in until one end can no longer be pushed. Then, the operator manually screws the locking sleeve 24 into the threaded section 23 until it abuts against one end of the take-up roller to achieve the installation and locking of the take-up drum 22. Similarly, after winding is completed, the locking sleeve 24 can be removed, and the take-up drum 22 can be taken out directly. The operation is simple.

[0024] The cooling mechanism 3 includes a cold box 31, inside which is installed a circular air-cooling ring 32, which is mainly located at the center of the cold box 31 and is movably connected to it. Fans 33 are arrayed on the inner wall of the air-cooling ring 32, and the PE film is located at the center of the ring. The cooling mechanism 3 mainly changes the temperature through a semiconductor cooling device inside the cold box 31. When the PE film is stretched to the winding platform 1, it passes through the cold box 31, where the low-temperature environment directly cools the film. Vapor is absorbed by a separately provided exhaust fan and circulated back into the cold box 31 after being cooled by a heat exchanger, thus achieving a primary cooling process. The cold box 31 also includes the circular air-cooling ring 32, which passes through the center of the PE film after it enters the cold box 31. As the film exits, the air-cooling ring 32 can rotate, moving across the surface of the PE film. Multiple fans 33 on the inner wall provide comprehensive air-cooling for the passing PE film. Combined with the low temperature inside the cold box 31, this achieves comprehensive and effective cooling. The cooling mechanism 3 achieves efficient and uniform cooling of the PE film through the dual synergy of low-temperature environment and dynamic air-cooling. Its core advantage lies in creating a stable low-temperature field inside the cold box 31, which can quickly reduce the overall thermodynamic energy of the film and promote the orderly transformation of PE molecular chains from the molten state to the glassy state. The design of the rotating air-cooling ring 32 breaks the thermal boundary layer that may be formed by static cooling. The multiple fans 33 distributed in a ring perform forced convection heat transfer on the film surface without dead angles during rotation, improving cooling efficiency and uniformity, and avoiding differences in film crystallinity and stress concentration caused by uneven local cooling.

[0025] The top and bottom of the cold box 31 are respectively fixed with connecting seats 34. Rollers 35 are provided inside the connecting seats 34, and the rollers 35 contact the surface of the air-cooling ring 32. The rollers 35 form a V-shape within the connecting seats 34, and the air-cooling ring 32 is located between the two rollers 35. A drive wheel 36 is provided inside the cold box 31, located near the side of the air-cooling ring 32, and mates with the surface of the air-cooling ring 32. One end of the drive wheel 36 is connected to a connecting rod 4. A drive motor 6 is connected to the outside of the cold box 31. The rotation of the connecting rod 4 and the drive motor 6... Gears 5 are connected to the ends respectively, and the two gears 5 mesh with each other. Connecting seats 34 are fixed at both ends inside the cold box 31. Rollers 35 are located in the connecting seats 34. Two rollers 35 form a group, and a V-shape is formed between the two rollers 35. They cooperate with the surface of the air-cooling ring 32, so that it is clamped between the two groups of rollers 35, thereby limiting the position of the air-cooling ring 32. A drive wheel 36 is added, which is driven by the transmission of the drive motor 6 and the gears 5. The surface of the drive wheel 36 cooperates with the surface of the air-cooling ring 32. When the drive wheel 36 rotates, it can drive the air-cooling ring 32 to rotate.

[0026] The limiting mechanism 7 includes limiting rollers 71 and swing brackets 73. The limiting rollers 71 are located on both sides of the cold box 31, and the swing brackets 73 are located between the cold box 31 and the take-up drum 22. There are two sets of limiting rollers 71, and each set of limiting rollers 71 is symmetrically distributed vertically. The PE film passes between the upper and lower limiting rollers 71. Inlet and outlet clamps 72 are fixed at the inlet and outlet positions on both sides of the cold box 31. The limiting mechanism 7 has two sets of limiting rollers 71, each set has two, and they are symmetrically distributed vertically. The limiting rollers 71 are located at the inlet and outlet ends of the cold box 31, ensuring that the PE film must pass between the two limiting rollers 71 when entering or exiting the cold box 31. Through precise guidance and physical constraint of the film, it is ensured that the film maintains a flat, stable, and uniform tension running trajectory throughout the process of entering and exiting the cold box 31, thereby avoiding uneven cooling, physical damage, or even production interruption caused by film shaking, wrinkles, or deviation, and fundamentally ensuring cooling. To ensure uniformity of the cooling effect and continuity of the production process, the cold box 31 is equipped with inlet and outlet clamps 72 at both the inlet and outlet. The inlet and outlet clamps 72 are triangular and, like the limiting rollers 71, require the PE film to pass through the inlet and outlet clamps 72 before entering or exiting the cold box 31. This ensures that the PE film fully engages with the inlet and outlet of the cold box 31 when entering, reducing the gap between the inlet and outlet and avoiding problems such as PE film wrinkles. Through the triangular guiding structure of the inlet and outlet clamps 72 and the synergistic effect of the limiting rollers 71, the PE film is forced to pass through the narrow inlet and outlet of the cold box 31 in a flat and centered state. This physically eliminates any possible gaps between the film and the box, effectively blocking large-scale convection exchange of air inside and outside the box. Thus, while maintaining a stable low-temperature environment inside the cold box 31, it completely avoids problems such as wrinkles, drifting, or uneven cooling caused by edge loosening or airflow disturbance of the film, ensuring the precision and efficiency of the cooling process.

[0027] The swing bracket 73 is U-shaped, and one end of the swing bracket 73 is axially connected to one side of the winding platform 1. A movable roller 74 is installed in the U-shaped groove of the swing bracket 73. The limiting mechanism 7 is also equipped with a freely swingable movable roller 74. The movable roller 74 is located inside the U-shaped swing bracket 73, and one end of the swing bracket 73 is axially connected to the front plane of the winding platform 1. As the surface of the winding roller continuously winds the PE film, the PE film wrapped on the surface of the winding drum 22 also continuously thickens. Therefore, the fixed roller cannot meet the requirements, so it is changed to a swingable movable roller 74 to lock the PE film on the surface of the winding drum 22 as it thickens. As the winding direction changes, the movable roller 74 of the swing bracket 73 remains downward due to its weight, while simultaneously exhibiting an upward lifting effect, thus maintaining its limiting function. The significance of the movable roller 74 lies in its adaptive swing characteristics, which dynamically compensate for the constantly changing film ejection angle and tension path caused by the continuous increase in film roll diameter during the winding process. This ensures that the film maintains a stable wrap angle and appropriate tension throughout the transmission section from the cold box 31 outlet to the winding drum 22, thereby effectively preventing film slack, wrinkling, or excessive stretching caused by sudden path changes, and guaranteeing the flatness and quality stability of the winding.

[0028] Working Principle: The cooling device primarily cools the PE film after it has been formed but before it is wound up. The molten PE molecular chains are in a chaotic, high-energy state. If forced cooling is not used to rapidly reduce its temperature below the glass transition temperature, the molecular chains will not be able to freeze and arrange themselves in time. This leads to uneven thickness, sticky surfaces, and even cracking of the film due to its own weight, and its physical strength is extremely low, making it impossible to wind up. Efficient cooling not only instantly shapes the film bubble or cast film and stabilizes its dimensions, but also induces the formation of a uniform microcrystalline structure. This significantly improves the film's transparency, tensile strength, puncture resistance, and dimensional stability, ensuring the smooth progress of subsequent slitting and winding processes, and ultimately... To ensure the mechanical properties and packaging reliability of the stretch film during use, the winding platform 1 includes a winding mechanism 2, a cooling mechanism 3, and a limiting mechanism 7. This allows the PE film to be wound and limited on the same device, and to be forcibly cooled before winding. Multiple functions are integrated into one device, eliminating the need for additional equipment. It has a small footprint and is easy to operate. Specifically, the winding drum 22 in the winding mechanism 2 is sleeved on the surface of the roller 21 and fixed by the locking sleeve 24. The roller 21 is driven to rotate by a motor, which in turn drives the winding drum 22 on the surface to move. At this time, the PE film fixed on the surface of the winding drum 22 is wound around the surface of the winding drum 22 under the action of rotation.

[0029] It is worth noting that one section of the roller 21 is a threaded section 23. The locking sleeve 24, which mates with it, can be threadedly connected to the threaded section 23 in this part. The surface of the locking sleeve 24 includes multiple handles for easy rotation by the operator. In summary, when installing the take-up drum 22, simply remove the locking sleeve 24, fit the take-up drum 22 onto the surface of the roller 21, and push it in until one end can no longer be pushed. Then, the operator manually screws the locking sleeve 24 into the threaded section 23 until it abuts against one end of the take-up roller to achieve the installation and locking of the take-up drum 22. Similarly, after winding is completed, the locking sleeve 24 can be removed, and the take-up drum 22 can be taken out directly. The operation is simple.

[0030] The cooling mechanism 3 mainly changes the temperature through semiconductor cooling components inside the cold box 31. When the PE film is stretched to the winding platform 1, it passes through the cold box 31, where the low-temperature environment directly cools the film. Steam is absorbed by a separately provided exhaust fan and circulated back into the cold box 31 after being cooled by a heat exchanger, thus achieving a primary cooling process. The cold box 31 also includes a ring-shaped air-cooling ring 32. After the PE film enters the cold box 31, it passes through the center of the ring and exits from the outlet of the cold box 31. The ring-shaped air-cooling ring 32 can rotate, moving across the surface of the PE film. Multiple fans 33 on the inner wall provide comprehensive cooling for the passing PE film. The air cooling process, combined with the low temperature inside the cold box 31, achieves comprehensive and effective cooling. The cooling mechanism 3 achieves efficient and uniform cooling of the PE film through the dual synergy of low temperature environment and dynamic air cooling. Its core advantage lies in the stable low temperature field created inside the cold box 31, which can quickly reduce the overall thermodynamic energy of the film and promote the orderly transformation of PE molecular chains from the molten state to the glassy state. The design of the rotating air cooling ring 32 breaks the thermal boundary layer that may be formed by static cooling. The multiple fans 33 distributed in a ring perform forced convection heat transfer on the film surface without dead angles during rotation, which improves cooling efficiency and uniformity and avoids differences in film crystallinity and stress concentration caused by uneven local cooling.

[0031] To further explain, connecting seats 34 are fixed at both ends inside the cold box 31. Rollers 35 are located inside the connecting seats 34. Two rollers 35 form a group, and a V-shape is formed between the two rollers 35. They cooperate with the surface of the air-cooling ring 32, allowing it to be clamped between the two groups of rollers 35, thereby limiting the position of the air-cooling ring 32. A drive wheel 36 is added, which is rotated by the transmission of the drive motor 6 and the gear 5. The surface of the drive wheel 36 cooperates with the surface of the air-cooling ring 32. When the drive wheel 36 rotates, it can drive the air-cooling ring 32 to rotate.

[0032] The limiting mechanism 7 has two sets of limiting rollers 71, each set consisting of two rollers, which are symmetrically distributed vertically. The limiting rollers 71 are located at the inlet and outlet of the cold box 31, ensuring that the PE film passes between the two limiting rollers 71 when entering or exiting the cold box 31. Through precise guidance and physical constraint of the film, it is ensured that the film maintains a flat, stable and uniform tension running trajectory throughout the process of entering and exiting the cold box 31, thereby avoiding uneven cooling, physical damage or even production interruption caused by film shaking, wrinkles or deviation. This fundamentally ensures the uniformity of cooling effect and the continuity of the production process.

[0033] Meanwhile, the inlet and outlet of the cold box 31 are respectively equipped with inlet and outlet clamps 72. The inlet and outlet clamps 72 are triangular and, like the limiting rollers 71, require the PE film to pass through the inlet and outlet clamps 72 before entering or exiting the cold box 31. This ensures that the PE film fully matches the inlet and outlet of the cold box 31 when it enters, reducing the gap between the inlet and outlet and avoiding problems such as PE film wrinkles. Through the triangular guiding structure of the inlet and outlet clamps 72 and the synergistic effect of the limiting rollers 71, the PE film is forced to pass through the narrow inlet and outlet of the cold box 31 in a flat and centered state. This physically eliminates the possible gap between the film and the box, effectively blocking the large-scale convection exchange of air inside and outside the box. Thus, while maintaining a stable low-temperature environment inside the cold box 31, it completely avoids problems such as wrinkles, drifting, or uneven cooling caused by edge loosening or airflow disturbance of the film, ensuring the precision and efficiency of the cooling process.

[0034] The limiting mechanism 7 is also equipped with a freely swingable movable roller 74. The movable roller 74 is located inside the U-shaped swing bracket 73. One end of the swing bracket 73 is axially connected to the front plane of the winding platform 1. As the surface of the winding roller continuously winds the PE film, the PE film wound on the surface of the winding drum 22 also continuously thickens. Therefore, the fixed roller cannot meet the requirements, so it is changed to a swingable movable roller 74. As the PE film on the surface of the winding drum 22 thickens, the winding direction of the PE film also changes. At this time, the movable roller 74 part of the swing bracket 73 is always downward due to the weight, and at the same time, it can lift upward, always maintaining the limiting function. The significance of the movable roller 74 is that, through its adaptive swinging characteristics, it dynamically compensates for the constantly changing film ejection angle and tension path due to the continuous increase in the film roll diameter during the winding process. It ensures that the film maintains a stable wrap angle and appropriate tension in the transmission section from the outlet of the cold box 31 to the winding drum 22, thereby effectively avoiding film slack, wrinkling or excessive stretching caused by sudden changes in the path, and ensuring the flatness and quality stability of the winding.

[0035] First, the PE film is pulled through the inlet and outlet of the cold box 31, which is precisely guided by the inlet and outlet clamps 72 and the upper and lower limit rollers 71, ensuring that it enters the low-temperature environment in a flat and stable state. Inside the cold box 31, the rotating air-cooling ring 32 performs forced convection heat transfer on the passing film without dead angles under the limiting drive of the drive wheel 36 and the V-shaped roller 35. Combined with the stable low-temperature field maintained by semiconductor refrigeration, it causes the PE molecular chains to quickly and uniformly transform from the molten state to the glassy state, completing the crystallization and shaping. Subsequently, the cooled and shaped film is discharged under the constraint of the outlet limit component, and the path and tension are dynamically adjusted by the adaptive swinging movable roller 74. Finally, it is smoothly wound on the winding mechanism 2 by the winding drum 22 fixed by the locking sleeve 24. The whole process realizes the integrated, high-efficiency, and high-quality continuous production from high-temperature molten film to formed roll material.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cooling device for PE wrapping film production, characterized by: Including the winding platform (1), the winding platform (1) is respectively installed with winding mechanism (2) and cooling mechanism (3), the cooling mechanism (3) is equipped with limiting mechanism (7) between winding mechanism (2); The winding mechanism (2) includes a roller and a winding drum (22), and the winding drum (22) is sleeved on the surface of the roller shaft (21); The cooling mechanism (3) includes a cold box (31), and the cold box (31) is internally provided with an air cooling ring (32); The limiting mechanism (7) includes a limiting roller (71) and a swing bracket (73), the limiting roller (71) is located on both sides of the cold box (31), and the swing bracket (73) is located between the cold box (31) and the winding drum (22).

2. The cooling device for PE wrapping film production according to claim 1, characterized in that: One end surface of the roller shaft (21) is provided with a threaded section (23), the threaded section (23) is threadedly connected with a locking sleeve (24), and one end of the locking sleeve (24) abuts against the winding drum (22).

3. The cooling device for PE wrapping film production according to claim 1, characterized in that: The air cooling ring (32) is a circular ring, and the air cooling ring (32) is mainly located at the center position of the cold box (31), and the air cooling ring (32) is movably connected with the cold box (31).

4. The cooling device for PE wrapping film production according to claim 1, characterized in that: The inner wall of the air cooling ring (32) is arrayed with a fan (33), and the PE film is located at the center position of the air cooling ring (32).

5. The cooling device for PE wrapping film production according to claim 1, characterized in that: The top end and the bottom end of the cold box (31) are respectively fixed with a connecting seat (34), the connecting seat (34) is internally provided with a roller (35), and the roller (35) is in surface contact with the air cooling ring (32).

6. The cooling device for PE wrapping film production according to claim 1, characterized in that: The roller (35) is located in the connecting seat (34) to form a V shape, and the air cooling ring (32) is located between the rollers (35) at the two ends.

7. The cooling device for PE wrapping film production according to claim 1, characterized in that: The cold box (31) is internally provided with a driving wheel (36), and the driving wheel (36) is located at the side close to the air cooling ring (32), and the driving wheel (36) is in surface cooperation with the air cooling ring (32).

8. The cooling device for PE wrapping film production according to claim 7, characterized in that: One end of the driving wheel (36) is connected with a connecting rod (4), the cold box (31) is externally connected with a driving motor (6), the rotating ends of the connecting rod (4) and the driving motor (6) are respectively connected with a gear (5), and the two gears (5) are meshed with each other.

9. The cooling device for PE wrapping film production according to claim 1, characterized in that: There are two groups of limiting rollers (71), and each group of limiting rollers (71) is symmetrically distributed upward and downward, and the PE film passes between the two limiting rollers (71) upward and downward, and the inlet and outlet positions on both sides of the cold box (31) are respectively fixed with inlet and outlet clamps (72).

10. The cooling device for PE wrapping film production according to claim 7, characterized in that: The swing bracket (73) is U-shaped, one end of the swing bracket (73) is shaft-connected with one side of the winding platform (1), and the U-shaped groove of the swing bracket (73) is internally provided with a movable roller (74).

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