A film casting machine with automatic casting frame shifting and a breathable membrane production line

Abstract

This utility model relates to the field of film production technology, and in particular to a film casting machine with automatic casting frame shifting and a breathable film production line. This film casting machine with automatic casting frame shifting includes a casting frame that is movable back and forth on a base; a film rolling mechanism and a film guiding mechanism are disposed on the casting frame; wherein, the film rolling mechanism includes a first roller, a second roller, and a third roller; the first roller is disposed on a first side of the second roller; the third roller is disposed on a second side of the second roller, and the first and third rollers can press against the second roller; the film guiding mechanism includes a first guide roller group and a second guide roller group; the first and second rollers roll and press a first film; the second and third rollers roll and press a second film. A first roller texture channel is formed between the first and second rollers, and a second roller texture channel is formed between the second and third rollers. The movement of the casting frame allows the extrusion head to select either the first or second roller texture channel. This design eliminates the need to disassemble the pressure rollers, resulting in shorter changeover times and helping to ensure production capacity.

Description

Technical Field

[0001] This utility model relates to the field of film production technology, and in particular to a film casting machine with automatic casting frame shifting and a breathable film production line. Background Technology

[0002] A film casting machine is a specialized piece of equipment for producing plastic films. Using casting technology, it continuously manufactures film rolls through processes such as extrusion, stretching, and cooling, producing materials such as breathable films and packaging films. This machine is widely used in various fields, including plastic packaging films, industrial films, medical films, and architectural films, providing strong production support for the packaging industry, agriculture, medical fields, and construction.

[0003] The patterns on the film are typically formed by pressing the film onto it using pressure rollers. However, some pressure rollers are directly mounted on the frame. When producing one pattern and then moving on to another, the original pressure roller must be disassembled and replaced with a new one for the corresponding pattern before production can continue. For example, some breathable films commonly use hexagonal honeycomb patterns and flat mesh patterns. When switching products, the corresponding pressure rollers need to be replaced, resulting in an interruption of about 4 hours and impacting production capacity. It is evident that this design requires a significant amount of time for replacement, leading to prolonged production interruptions and affecting overall capacity.

[0004] For example, Chinese Patent Application No. CN201520044066 discloses a cooling device for the pressure roller of a high-speed casting machine used for producing breathable films. This device is used to assist in cooling the pressure roller. The cooling device includes a support frame and multiple auxiliary cooling rollers mounted on the support frame and conforming to the roller surface. Each of the auxiliary cooling rollers has a cooling water circulation channel, and the roller surface is cooled by the circulation of cooling water. In this design, the pressure roller is directly mounted on the support frame. When changing the pattern and switching production, the pressure roller needs to be disassembled and replaced, which takes a considerable amount of time, resulting in prolonged production interruption and impacting capacity.

[0005] For example, Chinese patent application number CN202420729439.7 discloses a casting machine for producing breathable film, specifically stating that "a lower horizontal bevel gear is fixedly connected to the surface of the rotating shaft, a lower vertical bevel gear is fixedly connected to one end of the lower pressure roller, an adjusting plate is rotatably connected to the surface of the upper pressure roller, an upper horizontal bevel gear is rotatably connected to the surface of the adjusting plate, and an upper vertical bevel gear is fixedly connected to one end of the upper pressure roller." That is, the pressure roller is pre-assembled. When a change in pattern is needed for production, the pressure roller needs to be disassembled and replaced, which takes a considerable amount of time, resulting in prolonged production interruptions and impacting capacity. Utility Model Content

[0006] In view of this, the present invention addresses the deficiencies of the existing technology and its main objective is to provide a film casting machine with automatic casting frame shifting. This machine can select different pressure rollers through the casting frame, and there is no need to remove the pressure rollers during production changeover. This reduces the production changeover time and helps to ensure production capacity, thereby overcoming the shortcomings of the existing technology.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] This application provides a film casting machine with automatic casting frame shifting, including a casting frame that is movable back and forth on a base;

[0009] The film rolling mechanism and the film guiding mechanism are set in the casting frame;

[0010] The film rolling mechanism includes a first roller, a second roller, and a third roller; the first roller is disposed on a first side of the second roller; the third roller is disposed on a second side of the second roller, and the first roller and the third roller can press against the second roller;

[0011] The film guiding mechanism includes a first film guiding wheel group and a second film guiding wheel group; the first roller and the second roller roll the first film, and the first film is wound around the first film guiding wheel group;

[0012] The second and third rollers roll the second film, which is then wound around the second guide roller assembly.

[0013] Preferably, the first roller is a first steel roller with a first texture; the second roller is a silicone roller; the third roller is a second steel roller with a second texture; the second roller can drive the first roller and the second roller to move.

[0014] Preferably, a drive roller is provided on the side of the second roller, which can press on the second roller and drive the second roller to rotate.

[0015] Preferably, there are at least two drive rollers, and the included angle between the drive rollers is between 30 and 60°.

[0016] Preferably, the base is provided with a track; the bottom of the casting frame is provided with rollers; the output end of the servo motor is connected to the rollers; the servo motor drives the rollers to move on the track.

[0017] Preferably, the casting frame is provided with a first driving device and a second driving device; the first driving device includes a first cylinder and a first sliding module; the output end of the first cylinder is connected to a first roller, and the first roller is disposed in the first sliding module;

[0018] The second driving device includes a second cylinder and a second sliding module; the output end of the second cylinder is connected to a second roller, and the second roller is disposed in the second sliding module.

[0019] Preferably, the casting frame is provided with a first limiting plate and a second limiting plate for position adjustment; the first limiting plate can stop the first slide of the first sliding module; the second limiting plate can stop the second slide of the second sliding module.

[0020] Preferably, the first guide film wheel assembly includes a first guide film wheel and a second guide film wheel; the first guide film wheel is connected to a first end of the first swing arm; and the second end of the first swing arm is connected to a third cylinder.

[0021] The second guide film wheel assembly includes a third guide film wheel and a fourth guide film wheel; the third guide film wheel is connected to the first end of the second swing arm; the second end of the second swing arm is connected to the fourth cylinder.

[0022] A third guide roller assembly is provided on the side of the casting frame; the first film and the second film are wound around the third guide roller assembly, and the third guide roller assembly can drag the first film or the second film forward.

[0023] Preferably, the base is further provided with a second baffle; the second baffle can block the casting frame; a fourth silicone roller is provided on the bottom side of the first roller near the second roller, and the first roller can press on the fourth roller; a fifth silicone roller is provided on the bottom side of the third roller near the second roller, and the third roller can press on the fifth roller.

[0024] This application provides a breathable membrane production line, including a film machine with automatic casting frame shifting; an extruder is provided on the upstream side of the film machine with automatic casting frame shifting, and the extrusion head of the extruder is vertically and vertically mounted on the upper side of the casting frame; a thickness detection machine is provided on the downstream side of the film machine with automatic casting frame shifting, and a first film and a second film can pass through the thickness detection machine.

[0025] This invention has significant advantages and beneficial effects compared with existing technologies. Specifically, as shown in the above technical solution, a first roller texture channel is formed between the first and second rollers, and a second roller texture channel is formed between the second and third rollers. The film rolling mechanism and the film guiding mechanism are mounted on the casting frame, which can move back and forth on the base. Therefore, by moving the casting frame, the extrusion head can select either the first or second roller texture channel. This design eliminates the need to disassemble the pressure rollers, resulting in shorter changeover times and helping to ensure production capacity.

[0026] The first guide roller assembly can change the direction of movement of the first film, and the second guide roller assembly can change the direction of movement of the second film, so that the rolled film can smoothly enter the equipment for the next process. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the first film production process according to Embodiment 1 of this utility model.

[0028] Figure 2This is a schematic diagram of the second film production process according to Embodiment 1 of this utility model.

[0029] Figure 3 This is a schematic diagram of a traditional structure.

[0030] Explanation of reference numerals in the attached diagram:

[0031] 10. Base; 11. Track; 12. Second baffle; 20. Casting frame; 21. Roller; 22. First limiting plate; 23. Second limiting plate; 210. First driving device; 211. First cylinder; 213. First sliding module; 220. Second driving device; 221. Second cylinder; 223. Second sliding module; 30. Roller film mechanism; 31. First roller; 32. Fourth roller; 33. Drive roller; 34. Second roller; 35. Third roller; 36. Fifth roller; 37. First film; 38. Second film; 40. Film guiding mechanism; 41. First guide roller assembly; 42. Second guide roller assembly; 43. Third guide roller assembly; 44. First swing arm; 45. Second swing arm; 46. First guide roller; 47. Second guide roller; 410. Third cylinder; 411. Fourth cylinder; 412. Third guide roller; 413. Fourth guide roller; 414. Fifth guide roller; 50. Extruder; 51. Extrusion head. Detailed Implementation

[0032] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0033] Please refer to Figures 1 to 2 As shown, it illustrates the specific structure of a preferred embodiment of the present invention, which is a film casting machine with automatic shifting of the casting frame 20.

[0034] The movement of the casting frame 20 allows the extrusion head 51 to select different roller texture channels. This design enables direct production changeover, shortens changeover time, and helps ensure production capacity.

[0035] This application provides a film casting machine with an automatically shifting casting frame 20, including a casting frame 20 that is movable back and forth on a base 10; a film rolling mechanism 30 and a film guiding mechanism 40 are disposed on the casting frame 20; wherein, the film rolling mechanism 30 includes a first roller 31, a second roller 34, and a third roller 35; the first roller 31 is disposed on a first side of the second roller 34; the third roller 35 is disposed on a second side of the second roller 34, and the first roller 31 and the third roller 35 can press against the second roller 34; the film guiding mechanism 40 includes a first film guiding wheel group 41 and a second film guiding wheel group 42; the first roller 31 and the second roller 34 roll against each other, and a first film 37 is wound around the first film guiding wheel group 41; the second roller 34 and the third roller 35 roll against a second film 38, and the second film 38 is wound around the second film guiding wheel group 42. A first roller texture channel is formed between the first roller 31 and the second roller 34, and a second roller texture channel is formed between the second roller 34 and the third roller 35. A servo motor drives the casting frame 20 to move back and forth on the base 10, allowing the extrusion head 51 to select either the first or second textured channel. This design eliminates the need to disassemble and replace the pressure rollers during production changeovers, completing the process in approximately 10 minutes, compared to approximately 4 hours using traditional disassembly methods. This significantly reduces changeover time and ensures production capacity. The side of the second roller 34 can accommodate the first roller 31, the second roller 34, and even other rollers with different textures, adapting to various application scenarios and increasing work efficiency. The first guide roller group 41 and the second guide roller group 42 control the movement direction of the breathable membrane, facilitating overall layout. When producing the first texture, the casting frame 20 moves, the first film 37 passes through the first textured channel, the first roller 31 presses against the second roller 34, creating the first texture on the first film 37. The first film 37 then exits from the first guide roller group 41 and proceeds to subsequent processes. When producing the second type of film, the second film 38 passes through the second roller texture channel, and the third roller 35 presses against the second roller 34, and the second film 38 will produce a film with the second texture; then the second film 38 comes out from the second guide roller group 42 and enters the subsequent process.

[0036] Preferably, the first roller 31 is a first steel roller with a first texture; the second roller 34 is a silicone roller; and the third roller 35 is a second steel roller with a second texture. The second roller 34 can drive the first roller 31 and the second roller 35 to move respectively. The first texture can be a hexagonal mesh pattern, and the second texture can be an irregular flat pattern. The textures of the first and second textures can be set as needed and are not specifically limited. The second roller 34 is a liquid silicone roller. When the first steel roller or the second steel roller presses against the second roller 34, the second roller 34 can drive the first steel roller or the second steel roller to move respectively.

[0037] Preferably, a drive roller 33 is provided on the side of the second roller 34. The drive roller 33 can press on the second roller 34 and drive the second roller 34 to rotate. There are at least two drive rollers 33, and the included angle between the drive rollers 33 is between 30° and 60°. The drive rollers 33 are driven by a motor. Preferably, the power of the motor is transmitted to the drive rollers 33 via a belt, a synchronous belt, or a chain. The drive rollers 33 press on the second roller 34, thereby enabling the second roller 34 to rotate. The drive rollers 33 are elastic and can be one of a liquid silicone roller, an elastic plastic roller, or a rubber roller. In this embodiment, there are three drive rollers 33, and the included angle between the drive rollers 33 can be any value among 30°, 35°, 45°, 50°, and 60°. The synchronous movement of multiple drive rollers 33 makes the movement of the second roller 34 smoother and more stable.

[0038] Preferably, the base 10 is provided with a track 11; the bottom of the casting frame 20 is provided with rollers 21; the output end of the servo motor is connected to the rollers 21; the servo motor drives the rollers 21 to move on the track 11. The power of the servo motor is transmitted to the rollers 21 through a synchronous belt or chain, and the rollers 21 move on the track 11, thereby allowing the casting frame 20 to move on the base 10. The cooperation between the rollers 21 and the track 11 can ensure the movement accuracy of the casting frame 20 and prevent it from deviating.

[0039] Preferably, the casting frame 20 is provided with a first driving device 210 and a second driving device 220; the first driving device 210 includes a first cylinder 211 and a first sliding module 213; the output end of the first cylinder 211 is connected to a first roller 31, and the first roller 31 is disposed in the first sliding module 213. The first cylinder 211 drives the first roller 31 to move back and forth in the first sliding module 213, thereby enabling the first roller 31 to move toward the second roller 34. The first sliding module 213 is a slider-rail module.

[0040] The second driving device 220 includes a second cylinder 221 and a second sliding module 223. The output end of the second cylinder 221 is connected to the second roller 34, which is disposed in the second sliding module 223. The second cylinder 221 drives the second roller 34 to move back and forth in the second sliding module 223, thereby enabling the third roller to move toward the second roller 34. The second sliding module 223 is a slider-rail module.

[0041] Preferably, the casting frame 20 is provided with a first limiting plate 22 and a second limiting plate 23 for position adjustment; the first limiting plate 22 can stop the first slide of the first sliding module 213; the second limiting plate 23 can stop the second slide of the second sliding module 223. The first limiting plate 22 is used to control the position of the first roller 31, and the second limiting plate 23 is used to control the position of the third roller 35. This design can effectively control the force between the first roller 31 and the second roller 34, and between the third roller 35 and the second roller 34. This adjustment structure is simple and efficient. Preferably, the first limiting plate 22 and the second plate can be fixed to the casting frame 20 with screws.

[0042] Preferably, the first guide roller assembly 41 includes a first guide roller 46 and a second guide roller 47; the first guide roller 46 is connected to the first end of the first swing arm 44; the second end of the first swing arm 44 is connected to the third cylinder 410. The third cylinder 410 drives the first swing arm 44 to swing, thereby allowing the first guide roller 46 to press against the first roller 31, which can effectively control the direction of the first film. The first film line passes sequentially through the first guide roller 46 and the second guide roller 47, and then enters the third guide roller assembly 43.

[0043] The second guide roller assembly 42 includes a third guide roller 412 and a fourth guide roller 413. The third guide roller 412 is connected to the first end of the second swing arm 45, and the second end of the second swing arm 45 is connected to the fourth cylinder 411. The fourth cylinder 411 drives the second swing arm 45 to swing, thereby allowing the third guide roller 412 to press against the third roller 35, which can effectively control the direction of the first film. The first film line passes through the third guide roller 412 and the fourth guide roller 413 in sequence, and then enters the third guide roller assembly 43.

[0044] A third guide roller assembly 43 is provided on the side of the casting frame 20; the first film 37 and the second film 38 are wound around the third guide roller assembly 43, and the third guide roller assembly 43 can drag the first film 37 or the second film 38 forward. The fifth guide roller 414 of the third guide roller assembly 43 is powered and can drag the first film 37 or the second film 38 forward. The third guide roller assembly 43 can provide the first film 37 and the second film 38 with a certain tension, ensuring their production quality and preventing sagging.

[0045] Preferably, the base 10 is further provided with a second baffle 12; the second baffle 12 can stop the casting frame 20; a fourth silicone roller 32 is provided on the bottom side of the first roller 31 near the second roller 34, and the first roller 31 can press against the fourth roller 32; a fifth silicone roller 36 is provided on the bottom side of the third roller 35 near the second roller 34, and the third roller 35 can press against the fifth roller 36. The second baffle 12 can stop the casting frame 20 to control the movement position of the casting frame 20 and prevent it from running off the track 11. The fourth roller 32 pressing against the second roller 34 can prevent the first film 37 from sagging and ensure that the first film 37 can be smoothly wound around the first guide film roller group 41. The fifth roller 36 pressing against the third roller 35 can prevent the second film 38 from sagging and ensure that the second film 38 can be smoothly wound around the second guide film roller group 42.

[0046] Example 2

[0047] Example 2 includes a film machine with automatic shifting of the casting frame 20 as described in Example 1; the same parts will not be repeated. This application provides a breathable film production line, including the aforementioned film machine with automatic shifting of the casting frame 20. An extruder 50 is provided upstream of the film machine with automatic shifting of the casting frame 20, and the extrusion head 51 of the extruder 50 is vertically and vertically mounted on the upper side of the casting frame 20. A thickness detection machine is provided downstream of the film machine with automatic shifting of the casting frame 20, through which the first film 37 and the second film 38 can pass. The height of the extrusion head 51 is adjusted by a cylinder or a screw servo structure. During production changeover, the extrusion head 51 rises, and then the casting frame 20 moves, so that the extrusion head 51 corresponds to the first or second roller texture channel. This design makes production changeover very convenient and efficient. After the first film 37 or the second film 38 is produced, it enters the thickness detection machine, which detects the thickness of the film to further ensure quality.

[0048] In summary, the key design feature of this invention lies in the formation of a first roller texture channel between the first roller 31 and the second roller 34, and a second roller texture channel between the second roller 34 and the third roller 35; the casting frame 20 can move back and forth on the base 10. Therefore, by moving the casting frame 20, the extrusion head 51 can select either the first roller texture channel or the second roller texture channel. This design eliminates the need to disassemble and replace the pressure rollers, resulting in shorter production changeover time and helping to ensure production capacity.

[0049] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A film machine with automatic shifting of the casting stand, characterized in that: Includes a casting frame, which is mounted on a base and can move back and forth; The film rolling mechanism and the film guiding mechanism are set in the casting frame; The film rolling mechanism includes a first roller, a second roller, and a third roller; the first roller is disposed on a first side of the second roller; the third roller is disposed on a second side of the second roller, and the first roller and the third roller can press against the second roller; The film guiding mechanism includes a first film guiding wheel group and a second film guiding wheel group; the first roller and the second roller roll the first film, and the first film is wound around the first film guiding wheel group; The second and third rollers roll the second film, which is then wound around the second guide roller assembly.

2. A film machine with automatic shifting of the casting stand according to claim 1, characterized in that: The first roller is a first steel roller with a first texture; the second roller is a silicone roller; the third roller is a second steel roller with a second texture; the second roller can drive the first roller and the second roller to move.

3. A film machine with automatic displacement of the casting stand according to claim 1 or 2, characterized in that: A drive roller is provided on the side of the second roller. The drive roller can press on the second roller and drive the second roller to rotate.

4. A film casting machine with automatic casting frame shifting according to claim 3, characterized in that: The drive rollers are at least two in number, and the included angle between the drive rollers is between 30 and 60°.

5. A film casting machine with automatic casting frame shifting according to claim 1, characterized in that: The base is equipped with a track; the bottom of the casting frame is equipped with rollers; the output end of the servo motor is connected to the rollers; the servo motor drives the rollers to move on the track.

6. A film casting machine with automatic casting frame shifting according to claim 1, characterized in that: The casting frame is equipped with a first driving device and a second driving device. The first driving device includes a first cylinder and a first sliding module; the output end of the first cylinder is connected to a first roller, and the first roller is disposed in the first sliding module; The second driving device includes a second cylinder and a second sliding module; the output end of the second cylinder is connected to a second roller, and the second roller is disposed in the second sliding module.

7. A film casting machine with automatic casting frame shifting according to claim 6, characterized in that: The casting frame is provided with a first limiting plate and a second limiting plate for position adjustment; the first limiting plate can stop the first slide block of the first sliding module; The second limiting plate can stop the second slide block of the second sliding module.

8. A film casting machine with automatic casting frame shifting according to claim 1, characterized in that: The first guide film wheel assembly includes a first guide film wheel and a second guide film wheel; the first guide film wheel is connected to a first end of a first swing arm; the second end of the first swing arm is connected to a third cylinder; The second guide film wheel assembly includes a third guide film wheel and a fourth guide film wheel; the third guide film wheel is connected to the first end of the second swing arm; the second end of the second swing arm is connected to the fourth cylinder. A third guide roller assembly is provided on the side of the casting frame; the first film and the second film are wound around the third guide roller assembly, and the third guide roller assembly can drag the first film or the second film forward.

9. A film casting machine with automatic casting frame shifting according to claim 1, characterized in that: The base is also provided with a second baffle; the second baffle can block the casting frame; a fourth silicone roller is provided on the bottom side of the first roller near the second roller, and the first roller can press on the fourth roller; a fifth silicone roller is provided on the bottom side of the third roller near the second roller, and the third roller can press on the fifth roller.

10. A breathable membrane production line, characterized in that: The film machine includes an automatic casting frame shifting device as described in any one of claims 1-9; an extruder is provided on the upstream side of the film machine with automatic casting frame shifting device, and the extrusion head of the extruder is movably positioned on the upper side of the casting frame; a thickness detection machine is provided on the downstream side of the film machine with automatic casting frame shifting device, and the first film and the second film can pass through the thickness detection machine.

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