Tensile Shaping Device for Waterproof and Breathable Membrane

Abstract

The present invention relates to the field of plastic processing technology, in particular to a stretching and shaping device for a waterproof and breathable membrane, comprising a shell, an industrial hot air blower, a first lower roller, a first pressure roller, a second lower roller and a second pressure roller, the top of the shell being bolted with a heating box, both sides of the shell surface being penetrated by first vertical grooves, and both sides of the first pressure roller being rotatably connected with connecting plates; the present invention transmits the hot air generated by the industrial hot air blower to the upper air outlet hood, the lower air outlet hood and the ventilation cavity of the rotating drum through an air supply mechanism, the hot air blown out from the upper air outlet hood and the lower air outlet hood is evenly received by the upper and lower surfaces of the waterproof and breathable membrane, and the upper and lower surfaces are heated at the same time, and at the same time, the rotating drum is driven to rotate by turning on the second driving mechanism, so that the ventilation holes inside the rotating drum are rotated, so that the hot air is blown on the surface of the waterproof and breathable membrane from all angles, so that the waterproof and breathable membrane is once again heated evenly, thereby improving the quality of the product.

Description

Technical Field

[0001] The invention relates to the technical field of plastic processing, in particular to a stretching and shaping device for a waterproof and breathable membrane. Background Art

[0002] Waterproof breathable membranes primarily use thermoplastics as carriers, incorporating inorganic mineral fillers, then extruding them through a cold roll casting process. They are then longitudinally stretched to impart a unique microporous structure. These unique micropores, densely distributed across the membrane's surface, allow the membrane to block liquid water leakage while allowing gas molecules like water vapor to pass through. Currently, the primary applications for waterproof breathable membranes include personal hygiene products, medical protective equipment (such as medical mattresses, protective clothing, surgical gowns, surgical sheets, heat compresses, and medical pillowcases), personal protective equipment for special locations, clothing linings, pharmaceutical packaging accessories, and the construction industry. Existing waterproof breathable membrane production equipment is mainly composed of a casting machine, a preheating system, a stretching system, a cooling and setting system, etc. Among them, the function of the stretching system and the cooling and setting system is to form a microporous structure on the film by stretching and to set it by the cooling and setting system. However, the existing stretching system and the cooling and setting system use the method of flowing hot oil in the roller to transfer heat to the film, which can easily lead to uneven heating of the roller, resulting in uneven stretching and large deviation in the air permeability between different parts of the final film product, making it difficult to apply to fields that require a small deviation in air permeability.

[0003] A search revealed a Chinese patent document describing a waterproof and breathable film stretching device [Application Number: CN201922336384.5; Publication Number: CN211390126U]. This device comprises an oven, a hot air blower, and at least four sets of solid stretching rollers. The oven is provided with a film inlet and outlet at each end, hot air vents on each side, and an air intake at the top. The hot air blower's inlet is fluidly connected to the air intake, and its outlet is fluidly connected to the hot air vent. The stretching rollers are centrally arranged on the same horizontal plane within the oven and evenly spaced apart. Their rotational speed increases sequentially along the film's travel direction. The film is stretched in multiple steps, with each step having a relatively small stretch ratio. This ensures sufficient and uniform stretching and air permeability, while minimizing width reduction, thereby increasing product yield. Furthermore, because the film is uniformly heated within the oven using heated air, the surface temperature of the film is more uniform than with conventional thermal oil heating methods, resulting in more uniform stretching.

[0004] Although the above device heats relatively evenly, during the process of blowing hot air, hot air can only be blown to the upper side of the waterproof breathable membrane, and the lower side of the waterproof breathable membrane is not affected by the wind, which can easily cause uneven heating of the upper and lower parts. At the same time, the spacing between the upper and lower rollers of the device is not adjustable, and it cannot adapt to waterproof breathable membranes of different thicknesses. The thickness of waterproof breathable membranes generally has 0.1mm, 0.2mm, 0.3mm, 0.5mm, 1.0mm, 2.0mm, etc. Therefore, the applicability of the above device is poor. At the same time, although some stretching devices currently on the market can adjust the upper and lower rollers, each set of upper rollers requires a cylinder to push. During the adjustment process, the staff needs to open multiple sets of cylinders and perform multiple operations, which is very inconvenient. Summary of the Invention

[0005] The object of the present invention is to provide a stretching and shaping device for a waterproof and breathable membrane to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a stretching and shaping device for a waterproof and breathable membrane, comprising a shell, an industrial hot air blower, a first lower roller, a first pressure roller, a second lower roller and a second pressure roller, the top of the shell is bolted with a heating box, both sides of the shell surface are penetrated with a first vertical groove, both sides of the first pressure roller are rotatably connected with a connecting plate, the other side of the connecting plate is bolted with a lifting block, the surface of the shell and the upper and lower sides of the first through groove are bolted with a fixing plate, a screw is rotatably connected between the fixing plates on both sides, and the lifting block is threadedly connected to the surface of the screw, and the top and both sides of the shell are provided with A first driving mechanism, a mounting plate is bolted to one side of the interior of the heating box, a rotating drum is rotatably connected to the inner side of the mounting plate, a ventilation cavity is provided inside the rotating drum, a plurality of ventilation holes are opened through the inner side of the rotating drum, and the ventilation holes and the ventilation cavity are communicated with each other, an annular groove is opened on the surface of the outer side of the rotating drum, a ring body is slidingly provided on the inner wall of the annular groove, a second driving mechanism is provided on one side of the heating box, an upper air outlet hood and a lower air outlet hood are respectively fixed at the upper and lower positions on the other side of the heating box, an air supply mechanism is provided between the industrial hot air blower and the heating box, and an adjustment mechanism is provided at the front and rear positions on the other side of the heating box.

[0007] Preferably, the first driving mechanism includes a first motor, a first belt pulley and a second belt pulley, the first motor is bolted to the top of the shell, the first belt pulley is fixed to the output shaft of the first motor, connecting plates are bolted on both sides of the top of the shell, a transmission rod is provided through the surface of the connecting plate, and the transmission rod is rotatably connected to the penetration point of the connecting plate, a second belt pulley is fixed to one end of the transmission rod, and the first belt pulley is transmission-connected to the second belt pulley, a plurality of first bevel gears are fixed to the surface of the transmission rod, a second bevel gear is fixed to the top of the screw, and the first bevel gear and the second bevel gear are meshed with each other.

[0008] Preferably, the first belt pulley is a double-groove belt pulley, and the size of the first bevel gear is the same as that of the second bevel gear.

[0009] Preferably, the second driving mechanism includes a second motor, a first gear and a second gear, the second motor is bolted to one side of the heating box, the first gear is fixed to the output shaft of the second motor, the second gear is fixed to the surface of the rotating drum, and the first gear and the second gear are engaged with each other.

[0010] Preferably, a through groove is provided on one side of the heating box, and the upper and lower heights of the inner walls of the through groove are greater than the outer diameter of the first gear.

[0011] Preferably, the air supply mechanism includes a main pipe, a first connecting pipe, a second connecting pipe and a third connecting pipe, one end of the main pipe is interconnected with the air outlet of the industrial hot air blower, one end of the first connecting pipe is interconnected with the upper air outlet hood, one end of the second connecting pipe is interconnected with the lower air outlet hood, the other ends of the first connecting pipe and the second connecting pipe are both interconnected with the main pipe, one end of the third connecting pipe passes through the inner side of the ring body, and the other end of the third connecting pipe is interconnected with the main pipe.

[0012] Preferably, the adjustment mechanism includes a hydraulic rod, a horizontal plate and a vertical plate. The hydraulic rod is bolted to the surface of the heating box. The horizontal plate is fixed to the output shaft of the hydraulic rod. The horizontal plate is arranged on both sides of the second pressure roller, and the second pressure roller is rotatably connected to the vertical plate. A second vertical groove is opened on both sides of the heating box.

[0013] Preferably, a first auxiliary roller is fixed to the top of the shell and one side below the heating box, and second auxiliary rollers are fixed to both sides of the heating box.

[0014] Preferably, a vertical rod is bolted between the fixing plates on both sides, and the vertical rod passes through the lifting block and is slidably connected to the inner wall of the penetration point.

[0015] Preferably, there are several ventilation holes, and the ventilation holes are distributed in a circular array on the inner surface of the drum.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention transmits the hot air generated by the industrial hot air blower to the upper air outlet hood, the lower air outlet hood and the ventilation cavity of the rotating drum through the air supply mechanism. The hot air blown out from the upper and lower air outlet hoods is evenly received by the upper and lower surfaces of the waterproof breathable membrane, and the upper and lower surfaces are heated simultaneously. At the same time, by activating the second driving mechanism to drive the rotating drum to rotate, the ventilation holes inside the rotating drum rotate, allowing the hot air to blow on the surface of the waterproof breathable membrane from all angles, once again making the waterproof breathable membrane heated evenly, thereby improving the quality of the product.

[0018] 2. The present invention drives multiple groups of screws to rotate synchronously through the first driving mechanism, so that the lifting block on the surface of the screw drives the first pressure roller to rise and fall through the connecting plate, thereby changing the distance between the first pressure roller and the first lower roller. At the same time, the second pressure roller can be driven to rise and fall through the adjusting mechanism, thereby changing the distance between the second pressure roller and the second lower roller, so that the device can adapt to the processing of waterproof and breathable films of different thicknesses. Moreover, during the adjustment process, there is no need to perform multiple operations one by one, which is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 Schematic diagram of the cross-sectional structure of the housing and the heating box in the present invention;

[0021] Figure 3 Schematic diagram of the structure of the shell in the present invention;

[0022] Figure 4 It is a schematic diagram of the local structure of the present invention;

[0023] Figure 5 It is a schematic diagram of the local structure of the present invention;

[0024] Figure 6 A schematic structural diagram of another perspective of the present invention;

[0025] Figure 7 It is a schematic diagram of the local structure of the present invention;

[0026] Figure 8 It is a schematic diagram of the local structure of the present invention;

[0027] Figure 9 It is a structural schematic diagram of the rotary drum in the present invention;

[0028] Figure 10 Schematic diagram of the cross-sectional structure of the rotary drum in the present invention;

[0029] Figure 11 It is a structural schematic diagram of the adjustment mechanism in the present invention.

[0030] In the figure: 1. housing; 2. industrial hot air blower; 3. first lower roller; 4. first pressure roller; 5. second lower roller; 6. second pressure roller; 7. first vertical groove; 8. connecting plate; 9. lifting block; 10. fixing plate; 11. screw; 12. first driving mechanism; 121. first motor; 122. first pulley; 123. second pulley; 124. connecting plate; 125. transmission rod; 126. first bevel gear; 127. second bevel gear; 13. vertical rod; 14. mounting plate; 15. rotating drum; 16. ventilation chamber; 17. Ventilation hole; 18. Annular groove; 19. Ring body; 20. Upper air outlet hood; 21. Lower air outlet hood; 22. Air supply mechanism; 221. Main pipe; 222. First connecting pipe; 223. Second connecting pipe; 224. Third connecting pipe; 23. Second driving mechanism; 231. Second motor; 232. First gear; 233. Second gear; 24. Through groove; 25. Second vertical groove; 26. Adjustment mechanism; 261. Hydraulic rod; 262. Horizontal plate; 263. Vertical plate; 27. Heating box; 28. First auxiliary roller; 29. Second auxiliary roller. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] See also Figure 1-11, the stretching and shaping device of the waterproof and breathable membrane includes a shell 1, an industrial hot air blower 2, a first lower roller 3, a first pressure roller 4, a second lower roller 5 and a second pressure roller 6. The top of the shell 1 is bolted with a heating box 27, and both sides of the surface of the shell 1 are penetrated with a first vertical groove 7. The first lower roller 3 is rotatably connected to the inner wall of the shell 1, and the second lower roller 5 is rotatably connected to the inner wall of the heating box 27. Both sides of the first pressure roller 4 are rotatably connected with a connecting plate 8, and the other side of the connecting plate 8 is bolted with a lifting block 9. The surface of the shell 1 and the upper and lower sides of the first through groove 24 are bolted with a fixing plate 10, and a screw 11 is rotatably connected between the fixing plates 10 on both sides, and the lifting block 9 is threadedly connected to the surface of the screw 11. A first driving mechanism 12 is provided on the top and both sides of the shell 1, and a vertical rod 13 is also bolted between the fixing plates 10 on both sides, and the vertical rod 13 penetrates the lifting block 9 and is slidably connected to the inner wall of the penetration, which makes the lifting block 9 only The cam 15 is connected to the inner wall of the cam 15 by means of a screw 11 and a mounting plate 14 is provided on one side of the inner wall of the cam 15. The inner wall of the cam 15 is connected to the inner wall of the cam 15 by means of a screw 11 and a mounting plate 14 is provided on the inner side of the cam 15. The inner wall of the cam 15 is connected to the inner wall of the cam 15 by means of a screw 11. The cam 15 is connected to the inner wall of the cam 15 by means of a screw 11 and a mounting plate 14 is provided on the inner side of the cam 15. The inner wall of the cam 15 is connected to the inner wall of the cam 15 by means of a screw 11. The cam 15 is connected to the inner wall of the cam 15 by means of a screw 11.

[0033] The first driving mechanism 12 includes a first motor 121, a first belt pulley 122 and a second belt pulley 123. The first motor 121 is bolted to the top of the housing 1. The first belt pulley 122 is fixed to the output shaft of the first motor 121. Connecting plates 124 are bolted to both sides of the top of the housing 1. A transmission rod 125 is provided on the surface of the connecting plate 124, and the transmission rod 125 is rotatably connected to the penetration of the connecting plate 124. One end of the transmission rod 125 is fixed with the second belt pulley 123, and the first belt pulley 122 is transmission-connected to the second belt pulley 123. A plurality of first bevel gears 126 are fixed on the surface of the transmission rod 125, and a second bevel gear 127 is fixed to the top of the screw 11. The first bevel gear 126 and the second bevel gear 127 are meshed with each other. When the first motor 121 is turned on, it can drive the transmission rods 125 on both sides to rotate through the first belt pulley 122 and the second belt pulley 123. During the rotation process, the transmission rod 125 can drive the screw 11 below to rotate through the first bevel gear 126 and the second bevel gear 127, thereby providing power to the screw 11, so as to synchronously adjust each group of first pressure rollers 4. The first belt pulley 122 is a double-groove belt pulley. Since the first belt pulley 122 needs to drive two groups of second belt pulleys 123 at the same time, the above design is adopted, and the size of the first bevel gear 126 is the same as that of the second bevel gear 127.

[0034] The second driving mechanism 23 includes a second motor 231, a first gear 232 and a second gear 233. The second motor 231 is bolted to one side of the heating box 27. The first gear 232 is fixed to the output shaft of the second motor 231. The second gear 233 is fixed to the surface of the rotating drum 15. The first gear 232 and the second gear 233 are engaged with each other. When the second motor 231 is turned on, it can drive the second gear 233 through the first gear 232 to drive the rotating drum 15 to rotate. At the same time, in order to enable the first gear 232 to extend to the interior of the heating box 27 and engage with the second gear 233, a through groove 24 is provided on one side of the heating box 27. The upper and lower heights of the inner walls of the through groove 24 are greater than the outer diameter of the first gear 232. While allowing the first gear 232 to enter the heating box 27, the first gear 232 will not rub against the inner wall of the through groove 24.

[0035] The air supply mechanism 22 includes a main pipe 221, a first connecting pipe 222, a second connecting pipe 223 and a third connecting pipe 224. One end of the main pipe 221 is interconnected with the air outlet of the industrial hot air blower 2, one end of the first connecting pipe 222 is interconnected with the upper air outlet hood 20, one end of the second connecting pipe 223 is interconnected with the lower air outlet hood 21, the other ends of the first connecting pipe 222 and the second connecting pipe 223 are both interconnected with the main pipe 221, one end of the third connecting pipe 224 passes through the inner side of the ring body 19, and the other end of the third connecting pipe 224 is interconnected with the main pipe 221. When the industrial hot air blower 2 is turned on, the hot air generated by it can enter the first connecting pipe 222, the second connecting pipe 223 and the third connecting pipe 224 respectively through the main pipe 221, thereby achieving the effect of conveying hot air to the upper air outlet hood 20, the lower air outlet hood 21 and the rotating drum 15.

[0036] The adjusting mechanism 26 includes a hydraulic rod 261, a horizontal plate 262 and a vertical plate 263. The hydraulic rod 261 is bolted to the surface of the heating box 27. The horizontal plate 262 is fixed to the output shaft of the hydraulic rod 261. The horizontal plate 262 is arranged on both sides of the second pressure roller 6, and the second pressure roller 6 is rotatably connected to the vertical plate 263. When the hydraulic rod 261 is turned on, the extension or contraction of its output shaft can drive the horizontal plate 262 and the vertical plate 263 to rise and fall together, and drive the second pressure roller 6 to rise and fall together, thereby achieving the effect of adjusting the second pressure roller 6, and can synchronously adjust multiple groups of second pressure rollers 6. Second vertical grooves 25 are opened on both sides of the heating box 27 to leave a movement range for the rotating shaft of the second pressure roller 6.

[0037] A first auxiliary roller 28 is fixed to the top of the shell 1 and on one side below the heating box 27, and second auxiliary rollers 29 are fixed on both sides of the heating box 27. They play a guiding role and can introduce the waterproof breathable membrane into the heating box 27, and then guide the waterproof breathable membrane back to the shell 1 to achieve the guiding effect.

[0038] Working principle: When working, first turn on the first motor 121 of the first driving mechanism 12 to drive the screw 11 to rotate, which makes the lifting block 9 on the surface of the screw 11 move downward under the action of the thread, and then the lifting block 9 drives the first pressing roller 4 to move downward through the connecting plate 8, changing the gap between the first pressing roller 4 and the first lower roller 3, so as to adapt to waterproof breathable membranes of different thicknesses, and synchronously adjust multiple groups of first pressing rollers 4, without the need for staff to perform multiple adjustment operations one by one, which is more convenient, and then turn on the hydraulic rod 261, its output shaft extends to drive the horizontal plate 262 and the vertical plate 263 to descend, to adjust the distance between the second pressing roller 6 and the second lower roller 5 to adapt to waterproof breathable membranes of different thicknesses, after the adjustment is completed, the waterproof breathable membrane is introduced, during the stretching process, the waterproof breathable membrane is introduced from the side entrance of the shell 1, passes through the first pressing roller 4 and the first lower roller 3, and then passes through the first auxiliary roller 28 and the second auxiliary roller 29 on one side into the heating box 27, and then passes through the rotating drum 15 into the second pressing roller 6 and the second lower roller 5, so that the waterproof breathable membrane Under the guidance of the second auxiliary roller 29 on the other side, it re-enters the other side of the shell 1, and under the action of the first pressure roller 4 and the first lower roller 3 on the other side, it exits from the other side of the shell 1. During the whole process, the waterproof and breathable membrane is stretched by multiple rollers. The first lower roller 3 and the second lower roller 5 are both externally connected to a power source. The power source is a prior art, driven by a motor, and will not be repeated here. Inside the heating box 27, the industrial hot air blower 2 is turned on, which can deliver hot air to the upper air outlet hood 20, the lower air outlet hood 21 and the ring through the air supply mechanism 22. On the inner side of the ring body 19, hot air is blown from the upper air outlet hood 20 and the lower air outlet hood 21 onto the upper and lower surfaces of the breathable membrane respectively, heating them evenly. At the same time, the second driving mechanism 23 is turned on to drive the rotating drum 15 to rotate. When the hot air enters the inner side of the ring body 19, it can enter the ventilation cavity 16, and then the hot air is blown onto the surface of the breathable membrane through the ventilation holes 17. Moreover, the air is blown during the rotation process, so that the breathable membrane is evenly blown and heated more evenly. At the same time, during the rotation of the rotating drum 15, under the action of the annular groove 18, the ring body 19 will not rotate with the rotating drum 15.

[0039] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0040] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A stretching and shaping device for a waterproof and breathable membrane, comprising a housing (1), an industrial hot air blower (2), a first lower roller (3), a first pressing roller (4), a second lower roller (5) and a second pressing roller (6), characterized in that: The top of the shell (1) is bolted to a heating box (27), both sides of the surface of the shell (1) are penetrated by a first vertical groove (7), both sides of the first pressure roller (4) are rotatably connected to a connecting plate (8), the other side of the connecting plate (8) is bolted to a lifting block (9), the surface of the shell (1) and the upper and lower sides of the first vertical groove (7) are bolted to a fixing plate (10), the fixing plates (10) on both sides are rotatably connected to each other, and the lifting block (9) is threadedly connected to the surface of the screw (11), the top and both sides of the shell (1) are provided with a first driving mechanism (12), one side of the interior of the heating box (27) is bolted to a mounting plate (14), the inner side of the mounting plate (14) is rotatably connected to a rotating drum (15), a ventilation cavity (16) is provided inside the rotating drum (15), a plurality of ventilation holes (17) are provided on the inner side of the rotating drum (15), and the ventilation holes (17) and the ventilation cavity (16) are communicated with each other, an annular groove (18) is provided on the outer surface of the rotating drum (15), and a ring body (19) is slidably provided on the inner wall of the annular groove (18), a second driving mechanism (23) is provided on one side of the heating box (27), an upper air outlet hood (20) and a lower air outlet hood (21) are fixed at the upper and lower positions of the other side of the heating box (27), an air supply mechanism (22) is provided between the industrial hot air blower (2) and the heating box (27), and an adjustment mechanism (26) is provided at the front and rear positions of the other side of the heating box (27); The first driving mechanism (12) includes a first motor (121), a first belt pulley (122) and a second belt pulley (123), the first motor (121) is bolted to the top of the housing (1), the first belt pulley (122) is fixed to the output shaft of the first motor (121), connecting plates (124) are bolted to both sides of the top of the housing (1), a transmission rod (125) is provided through the surface of the connecting plate (124), and the transmission rod (125) is rotatably connected to the through-hole of the connecting plate (124), one end of the transmission rod (125) is fixed with the second belt pulley (123), and the first belt pulley (122) is transmission-connected to the second belt pulley (123), a plurality of first bevel gears (126) are fixed to the surface of the transmission rod (125), a second bevel gear (127) is fixed to the top of the screw rod (11), and the first bevel gear (126) and the second bevel gear (127) are meshed with each other; The adjustment mechanism (26) includes a hydraulic rod (261), a horizontal plate (262) and a vertical plate (263). The hydraulic rod (261) is bolted to the surface of the heating box (27). The horizontal plate (262) is fixed to the output shaft of the hydraulic rod (261). The horizontal plate (262) is arranged on both sides of the second pressing roller (6), and the second pressing roller (6) is rotatably connected to the vertical plate (263). Second vertical grooves (25) are opened through both sides of the heating box (27).

2. The stretching and shaping device for a waterproof and breathable membrane according to claim 1, characterized in that: The first belt pulley (122) is a double-groove belt pulley, and the size of the first bevel gear (126) is the same as that of the second bevel gear (127).

3. The stretching and shaping device for a waterproof and breathable membrane according to claim 1, characterized in that: The second driving mechanism (23) includes a second motor (231), a first gear (232) and a second gear (233), wherein the second motor (231) is bolted to one side of the heating box (27), the first gear (232) is fixed to the output shaft of the second motor (231), and the second gear (233) is fixed to the surface of the rotating drum (15), and the first gear (232) and the second gear (233) are meshed with each other.

4. The stretching and shaping device for a waterproof and breathable membrane according to claim 3, characterized in that: A through slot (24) is provided on one side of the heating box (27), and the upper and lower heights of the inner walls of the through slot (24) are greater than the outer diameter of the first gear (232).

5. The stretching and shaping device for a waterproof and breathable membrane according to claim 1, characterized in that: The air supply mechanism (22) includes a main pipe (221), a first connecting pipe (222), a second connecting pipe (223) and a third connecting pipe (224), one end of the main pipe (221) is interconnected with the air outlet of the industrial hot air blower (2), one end of the first connecting pipe (222) is interconnected with the upper air outlet hood (20), one end of the second connecting pipe (223) is interconnected with the lower air outlet hood (21), the other ends of the first connecting pipe (222) and the second connecting pipe (223) are both interconnected with the main pipe (221), one end of the third connecting pipe (224) passes through the inner side of the ring body (19), and the other end of the third connecting pipe (224) is interconnected with the main pipe (221).

6. The stretching and shaping device for a waterproof and breathable membrane according to claim 1, characterized in that: A first auxiliary roller (28) is fixed to the top of the shell (1) and on one side below the heating box (27), and second auxiliary rollers (29) are fixed to both sides of the heating box (27).

7. The stretching and shaping device for a waterproof and breathable membrane according to claim 1, characterized in that: A vertical rod (13) is bolted between the fixing plates (10) on both sides, and the vertical rod (13) passes through the lifting block (9) and is slidably connected to the inner wall of the penetration point.

8. The stretching and shaping device for a waterproof and breathable membrane according to claim 1, characterized in that: There are a plurality of ventilation holes (17), and the ventilation holes (17) are distributed in a ring array on the inner surface of the rotating drum (15).

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