Calendering mechanism and calendering method for preparing a breathable film with high flatness

Abstract

The present invention discloses a calendering mechanism and a calendering method for preparing a breathable film with high flatness. The calendering mechanism includes a calendering device and a spraying device. The discharging end of the spraying device is connected to the feeding end of the calendering device. The calendering device includes a frame, a winding roller, an upper calender roll, a lower calender roll, an upper front calender roll, a lower front calender roll and an adjusting frame. The winding roller, the upper calender roll and the lower calender roll are rotationally connected to the frame. The upper calender roll and the lower calender roll are arranged corresponding to each other up and down. The adjusting frame is swingably connected to the frame. The upper front calender roll and the lower front calender roll are rotatably connected to the front end of the adjusting frame. Compared with the prior art, the present invention can make the calendering of the breathable film more flat, and at the same time make the bonding of the breathable film closer, further improving the product quality of the breathable film.

Description

Technical Field

[0001] The present invention relates to a calendering device for breathable membranes, and specifically to a calendering mechanism and a calendering method for preparing breathable membranes with high flatness. Background Art

[0002] Most of the existing breathable membranes on the market are waterproof breathable membranes, which mainly use polymer materials as raw materials. The breathable membrane is generally formed by laminating multiple films with different thicknesses and an adhesive, and then calendered by a calender to make the breathable membrane have better flatness. However, the existing calender only calenders through a pair of upper and lower calender rolls, and the flatness of the formed breathable membrane is poor. Moreover, before calendering, the glue is likely to form bubbles or protrusions between the two films, resulting in wrinkles on the surface of the breathable membrane after calendering, further affecting the flatness of the breathable membrane and reducing the product quality of the breathable membrane.

[0003] In view of this, the applicant has conducted in-depth research on the above problems, and thus this case has arisen. Summary of the Invention

[0004] One object of the present invention is to provide a calendering mechanism for preparing breathable membranes with high flatness, which can make the calendering of the breathable membrane more flat, and at the same time make the bonding of the breathable membrane closer, further improving the product quality of the breathable membrane.

[0005] Another object of the present invention is to provide a calendering method, which can improve the waterproof property of the breathable membrane, and enhance the production efficiency and product quality of the breathable membrane.

[0006] To achieve the above objects, the solution of the present invention is as follows:

[0007] A calendering mechanism for preparing breathable membranes with high flatness includes a calendering device and a spraying device. The discharge end of the spraying device is connected to the feed end of the calendering device. The calendering device includes a frame, a winding roll, an upper calender roll, a lower calender roll, an upper front calender roll, a lower front calender roll, and an adjusting frame. The winding roll, the upper calender roll, and the lower calender roll are rotatably connected to the frame. The upper calender roll and the lower calender roll are arranged corresponding to each other up and down. The adjusting frame is swingably connected to the frame. The upper front calender roll and the lower front calender roll are rotatably connected to the front end of the adjusting frame.

[0008] Further, the adjusting frame includes a connecting frame, an upper adjusting rod, a lower adjusting rod, a fixed rotating shaft and a guiding rod. The connecting frame includes an upper inclined rod and a lower inclined rod. The rear ends of the upper inclined rod and the lower inclined rod are connected to each other. The front end of the upper inclined rod is fixedly connected to the fixed rotating shaft. The rear end of the upper adjusting rod is sleeved on the fixed rotating shaft. The side of the fixed rotating shaft is rotatably connected to the machine frame. The guiding rod is fixedly connected to the front end of the lower inclined rod. The rear end of the lower adjusting rod is sleeved on the guiding rod. An arc-shaped guiding groove is provided on the side wall of the machine frame, and the outer end of the guiding rod extends into the arc-shaped guiding groove for sliding connection.

[0009] Further, a torsion spring is sleeved on the fixed rotating shaft. One end of the torsion spring is connected to the side wall of the machine frame and the other end is connected to the upper inclined rod.

[0010] Further, a limiting boss, a spline section and a threaded section are sequentially arranged on the fixed rotating shaft and the guiding rod along the axial direction. Spline holes are provided on the upper adjusting rod and the lower adjusting rod, and a locking nut is provided on the threaded section.

[0011] Further, an adjusting block is further provided on the upper adjusting rod. An adjusting groove is provided on the side wall of the adjusting block. An adjusting slider is slidably connected in the adjusting groove. An adjusting shaft is rotatably connected to the adjusting slider. The adjusting shafts are arranged corresponding to each other up and down. The upper end of the adjusting slider is connected to the adjusting groove through a second spring.

[0012] Further, an adjusting sliding groove is provided on the side wall of the adjusting groove. An adjusting guide block extending into the adjusting sliding groove for sliding connection is provided on the side wall of the adjusting slider.

[0013] Further, a spraying device base, an outer cylinder sleeve, a heat insulation cylinder sleeve, a spraying roller and a storage barrel are provided. A fixing plate and a mounting plate are provided on the base. The two ends of the outer cylinder sleeve are detachably connected to the fixing plate and the mounting plate. The heat insulation cylinder sleeve is embedded in the outer cylinder sleeve. A drying channel is provided between the heat insulation cylinder sleeve and the heat insulation sleeve. An opening is provided on the side wall of the outer cylinder sleeve. An inlet film port and an outlet film port are provided on the heat insulation cylinder sleeve within the range of the opening. A plurality of spraying rollers are provided in the heat insulation cylinder sleeve. The two ends of the spraying roller are rotatably connected to the side wall of the outer cylinder sleeve. A spraying channel is provided inside the spraying roller. A plurality of air outlet holes are provided on the outer surface of the spraying roller. The storage barrel is used for storing a waterproof agent. The discharging end of the storage barrel is connected to the spraying channels of each spraying roller through a hose. A heater and a power pump are provided on the storage barrel.

[0014] Further, the diameter of the spraying channel gradually increases from the end close to the hose to the end far from the hose along the axial direction.

[0015] A calendering method includes the following steps:

[0016] Step (1): Weighing and preparing materials;

[0017] Step (2): Form the base film and the waterproof and breathable layer;

[0018] Step (3): Feed the waterproof and breathable layer into the spraying device, and the spraying device sprays the waterproof agent onto the surface of the waterproof and breathable layer;

[0019] Step (4): The spraying device dries the waterproof and breathable layer;

[0020] Step (5): Transport the coated waterproof and breathable layer to the laminating device to laminate and form the waterproof and breathable layer with the base film;

[0021] Step (6): Transport the laminated breathable film to the winding device, and the upper front roller and the lower front roller perform a primary lamination on the breathable film;

[0022] Step (7): The upper roller and the lower roller perform a secondary lamination on the breathable film;

[0023] Step (8): The winding device winds up the laminated breathable film;

[0024] Step (9): Remove and transport the formed breathable film for storage.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] 1. The calendering device has a lamination function and a winding function. The upper front roller and the lower front roller can perform a preliminary lamination on the laminated film. When there are bubbles or protrusions in the waterproof and breathable layer, the adjusting frame can swing upward adaptively, so that the upper front roller and the lower front roller can better fit the film. Then the film is further laminated by the upper roller and the lower roller, further improving the flatness of the film and greatly enhancing the product quality of the film.

[0027] 2. The adjusting frame can swing on the frame. The waterproof and breathable layer of the breathable film is fed upward into the winding device. If the waterproof and breathable layer is not tightly laminated with the base film and protrusions are generated, when the protrusions pass through the upper front roller and the lower front roller, the protrusion part contacts and abuts against the upper front roller, causing the front end of the upper adjusting rod to move upward. When the upper adjusting rod moves, it drives the connecting frame to swing together and drives the front end of the lower adjusting rod to swing upward together. In this way, the feeding direction of the upper front roller and the lower front roller can be adjusted, and at the same time, the distance between the upper front roller and the lower front roller can be maintained, so that the upper front roller and the lower front roller can always tightly laminate the film and press the protrusion part of the waterproof and breathable layer flat. Then the breathable film is further laminated by the upper roller and the lower roller and wound by the winding roller. The guide rod can slide along the arc-shaped guide groove to guide the swing of the adjusting frame and make the swing of the adjusting frame more stable.

[0028] 3. When the adjusting frame swings upward, it drives the torsion spring to rotate. When the convex part of the breathable film passes through the upper front roller and the lower front roller, the surface tension of the breathable film changes. Under the elastic force of the torsion spring, the adjusting frame swings back to its original position, with a higher degree of automation.

[0029] 4. In the present invention, the spraying device can heat and atomize the waterproof agent and transport it to the spray roller through a power pump, so that the waterproof agent adheres to the surface of the waterproof breathable layer through the air outlet holes. At the same time, the high-temperature waterproof agent diffuses in the heat insulation cylinder sleeve, causing the temperature of the heat insulation cylinder sleeve to rise. Then, the waterproof breathable layer is transported along the drying channel, and the surface of the waterproof breathable layer is dried and ironed. In this way, not only can the antibacterial effect of the waterproof breathable layer be improved, but also the heat energy can be effectively utilized to dry the waterproof breathable layer, improve the flatness of the waterproof breathable layer, and further enhance the product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a three-dimensional external structure diagram of the calendering device.

[0031] Figure 2 It is a schematic cross-sectional structure diagram of the calendering device.

[0032] Figure 3 It is Figure 1 a partial enlarged view of area A in

[0033] Figure 4 It is a schematic installation structure diagram of the upper adjusting rod.

[0034] Figure 5 It is a three-dimensional external structure diagram of the spraying device.

[0035] Figure 6 It is a schematic cross-sectional structure diagram of the spraying device.

[0036] Figure 7 It is Figure 6 a partial enlarged view of area B in

[0037] Figure 8 It is Figure 6 a partial enlarged view of area C in

[0038] Figure 9 It is a schematic cross-sectional internal structure diagram of the outer cylinder sleeve.

[0039] Figure 10 It is a schematic cross-sectional structure diagram of the spray roller.

[0040] Figure 11 It is a schematic side cover structure diagram of the outer cylinder sleeve.

[0041] In the figure:

[0042] Frame 1, winding roller 11, arc-shaped guide groove 111, upper pressure roller 12, lower pressure roller 13,

[0043] Upper front pressure roller 14, lower front pressure roller 15, adjusting frame 2, upper adjusting rod 21,

[0044] Lower adjusting rod 22, fixed rotating shaft 23, torsion spring 231, limit boss 232,

[0045] Spline section 233, threaded section 234, locking nut 235, guide rod 24,

[0046] Upper inclined rod 25, lower inclined rod 26, adjusting block 3, adjusting groove 31,

[0047] Adjusting slider 32, second spring 33, adjusting shaft 334, base 4, fixing plate 41,

[0048] Mounting plate 42, guide slider 421, fixed rod 43, push rod 44, connecting rod 45,

[0049] Limit block 46, positioning boss 461, first spring 47, outer cylinder sleeve 51, limit groove 511, positioning hole 512, heat insulation cylinder sleeve 52, film inlet 521, film outlet 522,

[0050] Drying channel 53, spraying roller 6, spraying channel 61, air inlet hole 62, air outlet hole 63, bracket 7, ultraviolet lamp 71, positioning block 711, threaded rod 72, first bevel gear 73, knob 74, second bevel gear 75, connecting plate 76, clamping rod 77, storage barrel 8,

[0051] Heater 81, power pump 82, hose 83. Detailed implementation manners

[0052] In order to further explain the technical solution of the present invention, the present invention will be elaborated in detail below through specific embodiments.

[0053] Such as Figure 1-11As shown in the figure, a calendering mechanism for preparing a highly flat breathable film includes a calendering device and a spraying device. The discharge end of the spraying device is connected to the feed end of the calendering device. First, the waterproof breathable layer is sprayed by the spraying device, and then the waterproof breathable layer is bonded to the base film, and then sent into the calendering device for calendering and winding. The calendering device includes a frame 1, a winding roller 11, an upper calender roll 12, a lower calender roll 13, an upper front calender roll 14 and a lower front calender roll 15, and an adjusting frame 2. The winding roller 11, the upper calender roll 12 and the lower calender roll 13 are rotatably connected to the frame 1. The upper calender roll 12 and the lower calender roll 13 are arranged corresponding to each other up and down. The adjusting frame 2 is swingably connected to the frame 1. The upper front calender roll 14 and the lower front calender roll 15 are rotatably arranged at the front end of the adjusting frame 2. The adjusting frame 2 includes a connecting frame, an upper adjusting rod 21, a lower adjusting rod 22, a fixed rotating shaft 23 and a guide rod 24. The connecting frame includes an upper inclined rod 25 and a lower inclined rod 26. The rear ends of the upper inclined rod 25 and the lower inclined rod 26 are connected to each other. The front end of the upper inclined rod 25 is fixedly connected to the fixed rotating shaft 23. The rear end of the upper adjusting rod 21 is sleeved on the fixed rotating shaft 23. The side of the fixed rotating shaft 23 is rotatably connected to the frame 1. The guide rod 24 is fixedly connected to the front end of the lower inclined rod 26. The rear end of the lower adjusting rod 22 is sleeved on the guide rod 24. An arc-shaped guide groove 111 is provided on the side wall of the frame 1. The outer end of the guide rod 24 extends into the arc-shaped guide groove 111 for sliding connection. After adopting the above structure, the adjusting frame 2 can swing on the frame 1. The waterproof breathable layer of the breathable film is sent upward into the winding device. If the waterproof breathable layer is not closely attached to the base film and bulges, when the bulge passes through the upper front calender roll 14 and the lower front calender roll 15, the bulging part abuts against the upper front calender roll 14, causing the front end of the upper adjusting rod 21 to move upward. When the upper adjusting rod 21 moves, it drives the connecting frame to swing together and drives the front end of the lower adjusting rod 22 to swing upward together. In this way, the feeding direction of the upper front calender roll 14 and the lower front calender roll 15 can be adjusted, and the distance between the upper front calender roll 14 and the lower front calender roll 15 can be maintained, so that the upper front calender roll 14 and the lower front calender roll 15 can always tightly press the film, and the bulging part of the waterproof breathable layer is pressed flat. Then the breathable film is secondarily pressed by the upper calender roll 12 and the lower calender roll 13 and wound by the winding roller 11. The guide rod 24 can slide along the arc-shaped guide groove 111 to guide the swing of the adjusting frame 2, making the swing of the adjusting frame 2 more stable.

[0054] Preferably, a torsion spring 231 is sleeved on the fixed rotating shaft 23. One end of the torsion spring 231 is connected to the side wall of the frame 1 and the other end is connected to the upper inclined rod 25. After adopting the above structure, when the adjusting frame 2 swings upward, it will drive the torsion spring 231 to rotate. When the bulging part of the breathable film passes through the upper front calender roll 14 and the lower front calender roll 15, the surface tension of the breathable film changes, and the adjusting frame 2 is driven to swing back under the elastic force of the torsion spring 231.

[0055] Preferably, the fixed rotating shaft 23 and the guide rod 24 are successively provided with a limiting boss 232, a spline section 233 and a threaded section 234 along the axial direction. The upper adjusting rod 21 and the lower adjusting rod 22 are provided with spline holes, and a locking nut 235 is provided on the threaded section 234. After adopting the above structure, the upper adjusting rod 21 and the lower adjusting rod 22 are respectively sleeved on the spline section 233 of the fixed rotating shaft 23 and the guide rod 24, and then the upper adjusting rod 21 and the lower adjusting rod 22 are locked and fixed on the limiting boss 232 through the locking nut 235. And the spline section 233 can adjust the installation angles of the upper adjusting rod 21 and the lower adjusting rod 22, so as to adjust the relative positions of the upper front pressing roller 14 and the lower front pressing roller 15, so that the upper front pressing roller 14 and the lower front pressing roller 15 can be applicable to air-permeable films with different thickness dimensions, the use range is wider, and the disassembly, installation and adjustment are more convenient.

[0056] In this embodiment, an adjusting block 3 is further provided on the upper adjusting rod 21. An adjusting groove 31 is provided on the side wall of the adjusting block 3. An adjusting slider 32 connected in a sliding manner is arranged in the adjusting groove 31. An adjusting shaft 334 connected in a rotating manner is arranged on the adjusting slider 32. The adjusting shafts 334 are arranged corresponding to each other up and down. The upper end of the adjusting slider 32 and the adjusting groove 31 are connected by a second spring 33. After adopting the above structure, the air-permeable film passes through between the adjusting shafts 334. Under the elastic force of the second spring 33, the adjusting slider 32 and the adjusting shaft 334 are pulled to move upward, so that the adjusting slider 32 can be kept above the adjusting groove 31. When the adjusting frame 2 swings upward, the adjusting slider 32 can perform self-adaptive adjustment under the elastic force of the second spring 33, so that the waterproof and breathable layer can always be tightly attached to the upper front pressing roller 14 upward. The raised part of the waterproof and breathable layer can be better attached to the upper front pressing roller 14. The flatness of the pressing is further improved. An adjusting sliding groove is provided on the side wall of the adjusting groove 31, and an adjusting guide block extending into the adjusting sliding groove and connected in a sliding manner is provided on the side wall of the adjusting slider 32. The connection between the adjusting guide block and the adjusting sliding groove can make the sliding of the adjusting slider 32 more stable.

[0057] The spraying device includes a base 4, an outer cylinder sleeve 51, a heat-insulating cylinder sleeve 52, a spray roller 6, and a storage barrel 8. The base 4 is provided with a fixing plate 41 and a mounting plate 42. The two ends of the outer cylinder sleeve 51 are detachably connected to the fixing plate 41 and the mounting plate 42. The heat-insulating cylinder sleeve 52 is embedded in the outer cylinder sleeve 51. There is a drying channel 53 between the heat-insulating cylinder sleeve 52 and the heat-insulating sleeve. An opening is provided on the side wall of the outer cylinder sleeve 51, and the opening communicates with the drying channel 53. An inlet film port 521 and an outlet film port 522 are provided on the heat-insulating cylinder sleeve 52 within the range of the opening. Guide rollers are provided at the outer ends of the outlet film port 522 and the inlet film port 521. The guide rollers can guide the waterproof and breathable layer to prevent the antibacterial side from rubbing against the inlet film port 521 and the outlet film port 522. The inlet film port 521 is provided above the outlet film port 522, which can increase the contact area of the waterproof and breathable layer and further improve the heat recovery efficiency. A number of spray rollers 6 are provided inside the film heat-insulating cylinder sleeve 52. Specifically, three spray rollers 6 can be provided. The waterproof and breathable layer is wound around the spray rollers 6 to ensure that both the front and back sides of the waterproof and breathable layer can be closely attached to the surface of the spray rollers 6. In this way, the waterproof agent can be more directly attached to the surface of the waterproof and breathable layer, improving the spraying effect and spraying efficiency. The two ends of the spray roller 6 are rotatably connected to the side wall of the outer cylinder sleeve 51 through bearings. A spray channel 61 is provided inside the spray roller 6. An air inlet hole 62 is provided at the rotating shaft part of the spray roller 6 for the spray channel 61. A through hole is also provided on the side wall of the outer cylinder sleeve 51 to facilitate the connection of the hose 83 with the air inlet hole 62. A number of air outlet holes 63 are provided on the outer circumferential surface of the spray roller 6. The storage barrel 8 is used to store the waterproof agent. The discharge end of the storage barrel 8 is connected to the spray channels 61 of the spray rollers 6 through hoses 83. A heater 81 and a power pump 82 are provided on the storage barrel 8. The heater 81 and the power pump 82 heat the waterproof agent in the storage barrel 8 to a mist state and transport the waterproof agent along the hose 83 to the inside of the spray roller 6 through the power pump 82, and then the waterproof agent is discharged from the air outlet holes 63 of the spray roller 6 and attached to the waterproof and breathable layer.

[0058] After adopting the above structure, the formed waterproof and breathable layer first enters the heat-insulating cylinder sleeve 52 from the inlet film port 521 and is wound around each spray roller 6 in sequence. Then the waterproof and breathable layer extends out from the outlet film port 522 and enters the drying channel 53. The waterproof and breathable layer extends along the drying channel 53 and finally extends out from the opening, so that the surface of the waterproof and breathable layer fits on the outer surface of the heat-insulating cylinder sleeve 52. During production, it is transported into the spray roller 6 through the power pump 82, so that the waterproof agent is attached to the surface of the waterproof and breathable layer from the air outlet holes 63. At the same time, the high-temperature waterproof agent diffuses in the heat-insulating cylinder sleeve 52, causing the temperature of the heat-insulating cylinder sleeve 52 to rise. Then the waterproof and breathable layer is transported along the drying channel 53 to dry and iron the surface of the waterproof and breathable layer. In this way, not only can the antibacterial effect of the waterproof and breathable layer be improved, but also the heat energy can be effectively utilized to dry the waterproof and breathable layer, improving the flatness of the waterproof and breathable layer and further enhancing the product quality.

[0059] More preferably, the spray channel 61 gradually increases in diameter along the axial direction from the end close to the hose 83 towards the end away from the hose 83. After adopting the above structure, the spray channel 61 presents a conical horn shape, enabling the waterproofing agent mist to be sprayed and filled more quickly after entering the spray channel 61, making the waterproofing agent mist inside the spray roller 6 more abundant, and the air outlet on the surface of the spray roller 6 more uniform, so that the waterproofing agent mist can be better evenly distributed on the surface of the waterproof and breathable layer, further improving the spraying effect. And a drain hole is provided at the lower end inside the outer cylinder sleeve 51 for discharging the liquefied waterproofing agent.

[0060] Preferably, the spray roller 6 needs to be cleaned in time after long-term use. To facilitate the disassembly and assembly of the spray roller 6, a guiding slider 421 is fixedly connected to the lower end of the mounting plate 42, the guiding slider 421 is slidably connected inside the base 4, a fixing rod 43 is fixedly connected inside the base 4, the fixing rod 43 is slidably sleeved with the guiding slider 421, and a disassembly mechanism is provided on both the fixing plate 41 and the mounting plate 42. After adopting the above structure, during disassembly and assembly, the disassembly mechanism is disassembled, and then the mounting plate 42 is slid outwards along the fixing rod 43, so that the fixing plate 41 and the mounting plate 42 are disassembled and separated from the outer cylinder sleeve 51, making the disassembly of the outer cylinder sleeve more convenient, facilitating the cleaning of the inside of the outer cylinder sleeve, and also helping to replace the components of the spray roller 6.

[0061] In this embodiment, the disassembly mechanism includes a push rod 44, a connecting rod 45, a limiting block 46 and a first spring 47. Guide sliding holes are provided on the side walls of the fixing plate 41 and the mounting plate 42. The two ends of the connecting rod 45 are respectively connected to the push rod 44 and the limiting block 46. A limiting groove 511 is provided on the outer side wall of the outer cylinder sleeve 51, a positioning hole 512 is provided at the upper end of the limiting groove 511, the limiting block 46 is slidably connected in the limiting groove 511, a positioning boss 461 embedded in the positioning hole 512 is provided at the upper end of the limiting block 46, and the upper and lower ends of the first spring 47 are respectively connected to abut against the limiting block 46. After adopting the above structure, the two push rods 44 are pushed to approach each other. The push rod 44 drives the connecting rod 45 to move, driving the limiting blocks 46 to approach each other and compress the first spring 47. The positioning boss 461 is separated from the positioning hole 512 and slides out. Then, the mounting plate 42 is pulled outwards, so that the mounting plate 42 is disassembled and separated from the outer cylinder sleeve. This makes the disassembly and assembly of the outer cylinder sleeve more convenient.

[0062] Preferably, a bracket 7 is fixedly connected to the base 4, an ultraviolet lamp 71 is in contact with the bracket 7, a positioning block 711 is fixedly connected to the ultraviolet lamp 71, the positioning block 711 is slidably connected to the inside of the bracket 7, and a fixing mechanism is provided on the bracket 7. The fixing mechanism includes a threaded rod 72, a first bevel gear 73, a knob 74, a second bevel gear 75, a connecting plate 76, and a clamping rod 77. The threaded rod 72 is connected to the inside of the bracket 7 through a bearing, the first bevel gear 73 is fixedly connected to the threaded rod 72, the knob 74 is rotatably connected to the inside of the bracket 7, the second bevel gear 75 is fixedly connected to the knob 74, the first bevel gear 73 meshes with the second bevel gear 75, the connecting plate 76 is slidably connected to the inside of the bracket 7, the clamping rod 77 is fixedly connected to the connecting plate 76, the clamping rod 77 is slidably connected to the inside of the bracket 7, and the clamping rod 77 is slidably connected to the inside of the positioning block 711. By providing the ultraviolet lamp 71, the waterproof and breathable layer can be secondarily sterilized during the processing of the waterproof and breathable layer. By rotating the threaded rod 72, the threaded rod 72 performs a threaded movement with the connecting plate 76, causing the connecting plate 76 to slide on the threaded rod 72 and driving the clamping rod 77 to slide out of the positioning block 711 on the ultraviolet lamp 71, thereby releasing the limit on the ultraviolet lamp 71 and enabling the disassembly of the ultraviolet lamp 71. Producers can replace ultraviolet lamps 71 of different models and intensities according to requirements, with stronger applicability and more convenient disassembly and assembly.

[0063] A calendering method includes the following steps:

[0064] Step (1): Weighing and preparing materials;

[0065] Step (2): Forming the base film and the waterproof and breathable layer;

[0066] Step (3): Feeding the waterproof and breathable layer into a spraying device, and the spraying device sprays a waterproof agent onto the surface of the waterproof and breathable layer;

[0067] Step (4): The spraying device dries the waterproof and breathable layer;

[0068] Step (5): Transporting the coated waterproof and breathable layer to a laminating device to laminate and form the waterproof and breathable layer with the base film;

[0069] Step (6): Transporting the laminated breathable film to a winding device, and the upper front roller and the lower front roller perform a primary lamination on the breathable film;

[0070] Step (7): The upper roller and the lower roller perform a secondary lamination on the breathable film;

[0071] Step (8): The winding device winds up the laminated breathable film;

[0072] Step (9): Removing and transporting the formed breathable film for storage.

[0073] The above embodiments and drawings do not limit the product form and style of the present invention. Any appropriate changes or modifications made by those of ordinary skill in the art shall be considered as not departing from the patent scope of the present invention.

Claims

1. A calendering mechanism for preparing a breathable film with high flatness, characterized in that, It includes a calendering device and a spraying device. The discharging end of the spraying device is connected to the feeding end of the calendering device. The calendering device includes a frame, a winding roller, an upper calender roll, a lower calender roll, an upper front calender roll, a lower front calender roll and an adjusting frame. The winding roller, the upper calender roll and the lower calender roll are rotationally connected to the frame. The upper calender roll and the lower calender roll are arranged corresponding to each other vertically. The adjusting frame is swingably connected to the frame. The upper front calender roll and the lower front calender roll are arranged at the front end of the adjusting frame and are rotationally connected. The adjusting frame includes a connecting frame, an upper adjusting rod, a lower adjusting rod, a fixed rotating shaft and a guiding rod. The connecting frame includes an upper inclined rod and a lower inclined rod. The rear ends of the upper inclined rod and the lower inclined rod are connected to each other. The front end of the upper inclined rod is fixedly connected to the fixed rotating shaft. The rear end of the upper adjusting rod is sleeved on the fixed rotating shaft. The side of the fixed rotating shaft is rotationally connected to the frame. The guiding rod is fixedly connected to the front end of the lower inclined rod. The rear end of the lower adjusting rod is sleeved on the guiding rod. An arc-shaped guiding groove is provided on the side wall of the frame. The outer end of the guiding rod extends into the arc-shaped guiding groove and is slidably connected. A torsion spring is sleeved on the fixed rotating shaft. One end of the torsion spring is connected to the side wall of the frame and the other end is connected to the upper inclined rod. The fixed rotating shaft and the guiding rod are successively provided with a limiting boss, a spline section and a threaded section along the axial direction. Spline holes are provided on the upper adjusting rod and the lower adjusting rod. A locking nut is provided on the threaded section. An adjusting block is further provided on the upper adjusting rod. An adjusting groove is provided on the side wall of the adjusting block. An adjusting slider is slidably connected in the adjusting groove. An adjusting shaft is rotationally connected to the adjusting slider. The adjusting shafts are arranged corresponding to each other vertically. The upper end of the adjusting slider is connected to the adjusting groove through a second spring.

2. The calendering mechanism for preparing a highly flat breathable film according to claim 1, wherein, Adjusting sliding grooves are provided on the side wall of the adjusting groove. Adjusting guide blocks extending into the adjusting sliding grooves and slidably connected are provided on the side wall of the adjusting slider.

3. The calendering mechanism for preparing a breathable film with high flatness according to claim 1, characterized in that, The spraying device includes a base, an outer cylinder sleeve, a heat-insulating cylinder sleeve, a spray roller and a storage barrel. A fixing plate and a mounting plate are provided on the base. The two ends of the outer cylinder sleeve are detachably connected to the fixing plate and the mounting plate. The heat-insulating cylinder sleeve is embedded in the outer cylinder sleeve. A drying channel is provided between the heat-insulating cylinder sleeve and the heat-insulating sleeve. An opening is provided on the side wall of the outer cylinder sleeve. An inlet film port and an outlet film port are provided on the heat-insulating cylinder sleeve within the range of the opening. A plurality of spray rollers are provided in the heat-insulating cylinder sleeve. The two ends of the spray roller are rotationally connected to the side wall of the outer cylinder sleeve. A spray channel is provided inside the spray roller. A plurality of air outlet holes are provided on the outer surface of the spray roller. The storage barrel is used for storing a waterproof agent. The discharging end of the storage barrel is connected to the spray channels of each spray roller through a hose. A heater and a power pump are provided on the storage barrel.

4. The calendering mechanism for preparing a highly flat breathable film according to claim 3, characterized in that, The spray channel gradually increases in diameter from the end close to the hose towards the end away from the hose along the axial direction.

5. A calendering method based on the calendering mechanism according to any one of claims 1-4, characterized in that, It includes the following steps: Step (1): Weighing and preparing materials; Step (2): Forming a base film and a waterproof and breathable layer; Step (3): Feeding the waterproof and breathable layer into the spraying device, and the spraying device sprays the waterproof agent onto the surface of the waterproof and breathable layer; Step (4): The spraying device dries the waterproof and breathable layer; Step (5): Conveying the waterproof and breathable layer after coating to a laminating device to laminate and form the waterproof and breathable layer with the base film; Step (6): Convey the laminated breathable film to the winding device, and the upper front roller and the lower front roller perform a first lamination on the breathable film; Step (7): The upper roller and the lower roller perform a second lamination on the breathable film; Step (8): The winding device winds up the laminated breathable film; Step (9): Remove the formed breathable film roll and carry it for storage.

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