A cooling device for bopp film production

Abstract

This utility model discloses a cooling device for BOPP film production, including two cooling rollers and ventilation pipes fixedly connected to the inner cavities of the two cooling rollers. Both ends of the two ventilation pipes are connected to conduits, and supports are rotatably connected to the outer peripheries of the two conduits corresponding to the two cooling rollers. The device also includes a cooling mechanism, which is connected to both ends of the two cooling rollers. By using the cooling mechanism to fill the gap between the ventilation pipes and the cooling rollers with circulating coolant, the contact heat exchange between the coolant and the cooling rollers can be enhanced, achieving uniform cooling of the film. Combined with a blower mechanism that directly acts on the coolant within the cooling mechanism, the coolant temperature can be efficiently reduced, preventing a decrease in cooling capacity after heating. Simultaneously, the air outlet of the blower mechanism is connected to a decondensation mechanism, thereby blowing air onto the cooled film, preventing condensation formation at the source and completely solving the problems of film water stains and adhesion.

Description

Technical Field

[0001] This utility model relates to the field of BOPP film production technology, and in particular to a cooling device for BOPP film production. Background Technology

[0002] In the BOPP film production process, the cooling process is a key step to ensure the film forming quality, physical properties and production stability. Existing cooling devices mostly use cooling rollers as the core component. The cooling function is achieved by setting a flow structure inside the cooling roller and introducing coolant. At the same time, a bracket is used to support the rotation of the cooling roller.

[0003] However, existing devices have many shortcomings in practical applications: the coolant lacks an efficient means of cooling the circulating coolant inside the cooling roller, the coolant is prone to overheating, resulting in a decrease in cooling capacity, limited heat exchange efficiency, difficulty in achieving uniform cooling, and the cooled film surface is prone to contact with water vapor in the environment to form condensate, causing problems such as film water stains and adhesion. Utility Model Content

[0004] The purpose of this invention is to provide a cooling device for BOPP film production, so as to solve the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A cooling device for BOPP film production includes two cooling rollers and ventilation pipes fixedly connected to the inner cavities of the two cooling rollers. Both ends of the two ventilation pipes are connected to conduits, and supports are rotatably connected to the outer peripheries of two conduits correspondingly disposed on the two cooling rollers. The device also includes: A cooling mechanism is connected to both ends of the two cooling rollers, and the cooling mechanism is able to fill the gap between the ventilation pipe and the cooling rollers with circulating coolant for cooling the BOPP film. A blower mechanism is installed on a guide tube at the same end of the two cooling rollers, and the blower mechanism is used to cool the coolant filled in the cooling mechanism. The decondensation mechanism is located on the end guide tube of the two cooling rollers away from the blower mechanism, and the decondensation mechanism cooperates with the blower mechanism to blow air on the cooled BOPP film to prevent condensation.

[0006] Furthermore, the cooling mechanism includes connecting pipes connected to both ends of the two cooling rollers, all four connecting pipes are connected to the inner cavity between the ventilation pipe and the cooling rollers, and both ends of the four connecting pipes are respectively connected to the inner cavities of the four conduits, and the inner cavities of the four conduits are fixedly connected with partitions.

[0007] Furthermore, the blower mechanism includes a blower mounted on a bracket and several through holes opened on the outer periphery of the duct. The several through holes are all connected to the inner cavity of the duct. Limiting covers are rotatably connected to the outer sides of the several through holes on the duct. An air guide pipe is connected between the air outlet end of the blower and one of the limiting covers, and an air outlet pipe is connected to the limiting cover on the side away from the blower.

[0008] Furthermore, the decondensation mechanism includes two mounting plates fixedly connected to the bracket, and a connecting pipe is fixedly connected between the two mounting plates. The bottom end of the connecting pipe is provided with several air outlet holes, and the end of the air outlet pipe away from the limiting cover is connected to the inner cavity of the connecting pipe.

[0009] Furthermore, mounting brackets are fixedly connected to both outer ends of the bracket, and rotating joints are installed on both mounting brackets. One end of the rotating joint is coaxially assembled with the conduit, and the two can rotate relative to each other around the axis. The rotating joint is used to realize the transfer of coolant between the conduit and the fixed pipeline. The other end of the rotating joint is connected to a cooling pipe.

[0010] Furthermore, a sealing ring is installed at the rotatable connection between the limiting cover and the guide tube.

[0011] Furthermore, the cooling roller is symmetrically fitted with limiting rings on both sides of its outer periphery, and the limiting rings are threaded with fixing bolts, which rub against the surface of the cooling roller.

[0012] Furthermore, the air inlet end of the blower is equipped with a filter screen that can be detachably installed by bolts.

[0013] Furthermore, a spiral blade is fixedly connected to the outer periphery of the ventilation pipe, and the outer periphery of the spiral blade is fixedly connected to the inner wall of the cooling roller.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: By introducing circulating coolant into the gap between the ventilation pipe and the cooling roller through a cooling mechanism, the contact heat exchange between the coolant and the cooling roller can be enhanced, achieving uniform cooling of the film. Combined with the blower mechanism acting directly on the coolant in the cooling mechanism, the coolant temperature can be efficiently reduced, preventing the cooling capacity from decreasing after the temperature rises. At the same time, the air outlet of the blower mechanism is connected to the decondensation mechanism, thereby blowing air onto the cooled film, which can prevent the formation of condensate from the source and completely solve the problems of film water stains and adhesion. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a cooling device for BOPP film production proposed in this utility model. Figure 2A bottom view of the connection between the cooling roller and the decondensation mechanism of a cooling device for BOPP film production proposed in this utility model. Figure 3 This is a top view of the connection between the cooling roller and the blower mechanism of a cooling device for BOPP film production proposed in this utility model. Figure 4 This is a cross-sectional view of the cooling mechanism of a cooling device for BOPP film production proposed in this utility model. Figure 5 This is an enlarged view of point A of a cooling device for BOPP film production proposed in this utility model.

[0016] In the diagram: 1. Bracket; 2. Conduit; 3. Rotary joint; 4. Cooling pipe; 5. Mounting bracket; 6. Cooling roller; 7. Connecting pipe; 8. Limiting cover; 9. Air outlet pipe; 10. Connecting pipe; 11. Mounting plate; 12. Limiting ring; 13. Fixing bolt; 14. Air outlet; 15. Blower; 16. Filter screen; 17. Air duct; 18. Spiral blade; 19. Ventilation pipe; 20. Sealing ring; 21. Partition plate; 22. Through hole. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Reference Figure 1-5 A cooling device for BOPP film production includes two cooling rollers 6 and ventilation pipes 19 fixedly connected to the inner cavities of the two cooling rollers 6. Both ends of the two ventilation pipes 19 are connected to conduits 2, and supports 1 are rotatably connected to the outer periphery of the two conduits 2 correspondingly arranged on the two cooling rollers 6. The device also includes: A cooling mechanism is connected to both ends of the two cooling rollers 6, and the cooling mechanism can fill the gap between the ventilation pipe 19 and the cooling rollers 6 with circulating coolant for cooling the BOPP film. A blower mechanism is installed on the conduit 2 at the same end of the two cooling rollers 6, and the blower mechanism is used to cool the coolant filled in the cooling mechanism. The decondensation mechanism is located on the end guide tube 2 of the two cooling rollers 6 away from the blower mechanism, and the decondensation mechanism cooperates with the blower mechanism to blow air on the cooled BOPP film to prevent condensation.

[0019] In the example of this application, by setting a cooling mechanism to fill the gap between the ventilation pipe 19 and the cooling roller 6 with circulating coolant, the contact heat exchange between the coolant and the cooling roller 6 can be enhanced, and uniform cooling of the film can be achieved. In conjunction with the blower mechanism acting directly on the coolant in the cooling mechanism, the temperature of the coolant can be reduced efficiently, and the cooling capacity can be prevented from decreasing after the temperature rises. At the same time, the air outlet of the blower mechanism is connected to the decondensation mechanism, so as to blow air on the cooled film, which can prevent the formation of condensate from the root and completely solve the problems of film water stains and adhesion.

[0020] As a preferred example of this application, the cooling mechanism includes connecting pipes 7 connected to both ends of the two cooling rollers 6, all four connecting pipes 7 communicating with the inner cavity between the ventilation pipe 19 and the cooling rollers 6, and both ends of the four connecting pipes 7 communicating with the inner cavities of the four conduits 2 respectively, and each of the inner cavities of the four conduits 2 is fixedly connected with a partition plate 21.

[0021] In the example of this application, the connecting pipe 7 in the cooling mechanism connects the gap between the cooling roller 6 and the conduit 2, forming a complete coolant circulation path to ensure smooth circulation. The baffle 21 in the conduit 2 can separate the inner cavity to prevent coolant from flowing into the ventilation pipe 19 and affecting the normal operation of the blower mechanism.

[0022] As a preferred example of this application, the blower mechanism includes a blower 15 mounted on a bracket 1 and a plurality of through holes 22 formed on the outer periphery of a duct 2. The plurality of through holes 22 are all connected to the inner cavity of the duct 2. Limiting covers 8 are rotatably connected to the outer sides of the plurality of through holes 22 on the duct 2. A guide pipe 17 is connected between the air outlet end of the blower 15 and one of the limiting covers 8. An air outlet pipe 9 is connected to the limiting cover 8 on the side away from the blower 15. The air outlet pipe is a stainless steel pipe.

[0023] In the example of this application, the through hole 22 of the blower mechanism is connected to the inner cavity of the conduit 2, so that the airflow generated by the blower 15 can directly act on the coolant in the conduit 2, making the cooling more direct and efficient. In addition, the limiting cover 8 is rotatably connected to the conduit 2, which can be adapted to the rotation of the conduit 2 with the cooling roller 6, ensuring stable cooling of the coolant and providing a continuous airflow for the decondensation mechanism.

[0024] As a preferred example of this application, the decondensation mechanism includes two mounting plates 11 fixedly connected to the bracket 1, and a connecting pipe 10 fixedly connected between the two mounting plates 11. The bottom end of the connecting pipe 7 is provided with a plurality of air outlet holes 14, and the end of the air outlet pipe 9 away from the limiting cover 8 is connected to the inner cavity of the connecting pipe 7.

[0025] In the example of this application, the air outlet 14 at the bottom of the connecting pipe 10 can blow air evenly onto the cooled film, avoiding the generation of condensation due to insufficient local air blowing, and the air outlet pipe 9 introduces the airflow of the blower mechanism into the connecting pipe 10, without the need for an additional power source.

[0026] As a preferred example of this application, both ends of the outer side of the bracket 1 are fixedly connected to the mounting bracket 5, and both mounting brackets 5 are equipped with a rotary joint 3. One end of the rotary joint 3 is coaxially assembled with the conduit 2, and the two can rotate relative to each other around the axis. The rotary joint 3 is used to realize the transmission of coolant between the conduit 2 and the fixed pipeline. The other end of the rotary joint 3 is connected to the cooling pipe 4.

[0027] In the example of this application, the rotary joint 3 is coaxially assembled with the conduit 2 and can rotate relative to it, so that the coolant transmission is sealed and stable when the conduit 2 rotates with the cooling roller 6, avoiding leakage or transmission interruption.

[0028] As a preferred example of this application, a sealing ring 20 is installed at the rotatable connection between the limiting cover 8 and the conduit 2. Preferably, the sealing ring 20 is made of silicone.

[0029] In the example of this application, the sealing ring 20 at the rotatable connection between the limit cover 8 and the conduit 2 can significantly improve the sealing performance, prevent the airflow of the blower mechanism from leaking from the connection, ensure that all the airflow acts on the coolant for cooling, and at the same time prevent external impurities from entering the conduit 2 to contaminate the coolant or block the through hole 22, thus ensuring the cooling efficiency of the blower mechanism and the cleanliness of the coolant.

[0030] As a preferred example of this application, the cooling roller 6 is symmetrically and slidably fitted with limiting rings 12 on both sides of its outer periphery, and the limiting rings 12 are threaded with fixing bolts 13, and the fixing bolts 13 are rubbed against the surface of the cooling roller 6.

[0031] In the example of this application, the limiting ring 12 on the outer periphery of the cooling roller 6 is adjustable and can be adapted to BOPP films of different widths to prevent the film from shifting during the cooling process. The fixing bolt 13 fixes the position of the limiting ring 12 by frictional contact, ensuring stable positioning and preventing uneven cooling due to film shift, thereby further improving the uniformity of film cooling.

[0032] As a preferred example of this application, the air inlet end of the blower 15 is detachably fitted with a filter screen 16 by bolts.

[0033] In the example of this application, the removable filter 16 at the air inlet of the blower 15 can intercept impurities in the air, preventing them from entering the blower mechanism and clogging the through hole 22 or contaminating the coolant, thus ensuring smooth airflow and a clean cooling environment.

[0034] As a preferred example of this application, a spiral blade 18 is fixedly connected to the outer periphery of the ventilation pipe 19, and the outer periphery of the spiral blade 18 is fixedly connected to the inner wall of the cooling roller 6.

[0035] In the example of this application, the spiral blades 18 on the outer periphery of the ventilation pipe 19 are connected to the inner wall of the cooling roller 6, which extends the flow path of the coolant in the gap of the cooling roller 6, making the coolant more fully contact the inner wall of the cooling roller 6 and greatly improving the heat exchange efficiency.

[0036] Working principle: The produced BOPP film is wound in an S-shape around the outside of two cooling rollers 6. After the device is started, the cooling mechanism first delivers circulating coolant to the gap between the ventilation pipe 19 and the cooling roller 6 through the cooperation of the connecting pipe 7 and the conduit 2. The spiral blades 18 on the outer periphery of the ventilation pipe 19 extend the flow path of the coolant in the gap, so that the coolant can fully contact the inner wall of the cooling roller 6. At this time, the rotating cooling roller 6 contacts the film, and the BOPP film is cooled by the heat exchange effect of the coolant. During the coolant circulation process, the conduit 2 rotates synchronously with the cooling roller 6. The rotary joint 3 on the outer mounting bracket 5 rotates coaxially with the conduit 2, ensuring stable coolant transmission during the rotation of the conduit 2 and preventing leakage or transmission interruption, thus ensuring a continuous coolant supply to the cooling mechanism. Simultaneously, the blower mechanism on the bracket 1 starts. The blower 15 generates airflow after intercepting impurities in the air through the detachable filter 16 at the air inlet. The airflow enters the limiting cover 8 through the air duct 17. The limiting cover 8 is rotatably connected to the conduit 2, and the silicone sealing ring 20 at the connection ensures a seal, preventing airflow leakage. The airflow then enters the inner cavity of the conduit 2 through the through-hole 22 on the outer periphery of the conduit 2, directly acting on the coolant inside the conduit 2 to achieve efficient cooling of the coolant and prevent the coolant from overheating and reducing its cooling capacity. After the coolant has cooled down, the airflow is delivered through the stainless steel air outlet pipe 9 on the limiting cover 8 on the side away from the blower 15 to the connecting pipe 10 of the decondensation mechanism. The connecting pipe 10 is fixed by the mounting plate 11 on the bracket, and the air outlet 14 at its bottom blows the airflow evenly onto the BOPP film cooled by the cooling roller 6, preventing the film surface from condensing due to contact with ambient moisture at low temperature. In addition, the limiting rings 12 on both sides of the outer periphery of the cooling roller 6 can be adjusted to fit films of different widths. After adjustment, they are fixed by the fixing bolts 13 against the surface of the cooling roller 6, preventing the film from shifting during the cooling process and further ensuring the uniformity of film cooling, ultimately achieving stable and efficient cooling of the BOPP film.

[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A cooling device for BOPP film production, comprising two cooling rollers (6) and ventilation pipes (19) fixedly connected to the inner cavities of the two cooling rollers (6), wherein both ends of the two ventilation pipes (19) are connected to conduits (2), and the outer periphery of the two conduits (2) correspondingly arranged on the two cooling rollers (6) is rotatably connected to a bracket (1), characterized in that, Also includes: The cooling mechanism is connected to both ends of the two cooling rollers (6), and the cooling mechanism can fill the gap between the ventilation pipe (19) and the cooling rollers (6) with circulating coolant to cool the BOPP film. A blower mechanism is installed on a conduit (2) at the same end of the two cooling rollers (6), and the blower mechanism is used to cool the coolant filled in the cooling mechanism. The decondensation mechanism is located on the end guide tube (2) of the two cooling rollers (6) away from the blower mechanism. The decondensation mechanism cooperates with the blower mechanism to blow air on the cooled BOPP film to prevent condensation.

2. The cooling device for BOPP film production according to claim 1, characterized in that, The cooling mechanism includes connecting pipes (7) connected to both ends of the two cooling rollers (6). All four connecting pipes (7) are connected to the inner cavity between the ventilation pipe (19) and the cooling rollers (6). Both ends of the four connecting pipes (7) are connected to the inner cavities of the four conduits (2). The inner cavities of the four conduits (2) are all fixedly connected to a partition plate (21).

3. A cooling device for BOPP film production according to claim 2, characterized in that, The blower mechanism includes a blower (15) mounted on a bracket (1) and several through holes (22) opened on the outer periphery of the duct (2). The several through holes (22) are all connected to the inner cavity of the duct (2). The outer side of the several through holes (22) on the duct (2) is rotatably connected to a limit cover (8). The air outlet of the blower (15) is connected to one of the limit covers (8) by a guide pipe (17), and an air outlet pipe (9) is connected to the limit cover (8) on the side away from the blower (15).

4. A cooling device for BOPP film production according to claim 3, characterized in that, The decondensation mechanism includes two mounting plates (11) fixedly connected to the bracket (1), and a connecting pipe (10) is fixedly connected between the two mounting plates (11). The bottom end of the connecting pipe (7) is provided with several air outlet holes (14), and the end of the air outlet pipe (9) away from the limiting cover (8) is connected to the inner cavity of the connecting pipe (7).

5. A cooling device for BOPP film production according to claim 1, characterized in that, The bracket (1) is fixedly connected to two mounting brackets (5) on both sides. Rotary joints (3) are installed on both mounting brackets (5). One end of the rotary joint (3) is coaxially assembled with the conduit (2). The two can rotate relative to each other around the axis. The rotary joint (3) is used to realize the transmission of coolant between the conduit (2) and the fixed pipeline. The other end of the rotary joint (3) is connected to the cooling pipe (4).

6. A cooling device for BOPP film production according to claim 4, characterized in that, A sealing ring (20) is installed at the rotatable connection between the limiting cover (8) and the guide tube (2).

7. A cooling device for BOPP film production according to claim 1, characterized in that, The cooling roller (6) is symmetrically fitted with limiting rings (12) on both sides of its outer periphery, and a fixing bolt (13) is threaded through the limiting ring (12), and the fixing bolt (13) rubs against the surface of the cooling roller (6).

8. A cooling device for BOPP film production according to claim 3, characterized in that, The blower (15) has a filter screen (16) installed at the air inlet end by bolts.

9. A cooling device for BOPP film production according to claim 1, characterized in that, The outer periphery of the ventilation pipe (19) is fixedly connected to a spiral blade (18), and the outer periphery of the spiral blade (18) is fixedly connected to the inner wall of the cooling roller (6).

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