A stretching device and stretching method for adjustable breathable film production

Abstract

The invention discloses a stretching device and a stretching method for adjustable breathable film production, which relate to the technical field of breathable film production and processing, including: a support plate, which is arranged on the ground, and transverse stretching mechanisms for stretching are arranged on both left and right sides of the top of the support plate, and exhaust mechanisms for exhausting are arranged on one side of the two transverse stretching mechanisms; two fixed side plates are arranged, and the two fixed side plates are respectively arranged on the front and rear sides of the top of the support plate, and an adjusting piece for adjusting the spacing is arranged between the two fixed side plates, and two groups of symmetrically arranged transmission mechanisms are arranged on opposite sides of the two fixed side plates; transmission is carried out through a rotating gear on another rotating shaft, so that two first transmission belts rotate synchronously, so that the longitudinal stretching mechanisms on the two first transmission belts clamp the breathable film one by one up and down, so as to avoid the breathable film from becoming narrower due to stretching, resulting in wrinkles.

Description

Technical Field

[0001] The invention relates to the field of breathable film production and processing, and in particular to an adjustable breathable film production stretching device and a stretching method. Background Art

[0002] Waterproof breathable membrane is a new type of polymer waterproof material. From the production process, the technical requirements of waterproof breathable membrane are much higher than those of general waterproof materials; at the same time, from the quality point of view, waterproof breathable membrane also has functional characteristics that other waterproof materials do not have.

[0003] Chinese invention patent CN217553115U discloses a stretching device for processing polyethylene cast breathable film; when the breathable film is stretched, it can prevent its width direction from shrinking and narrowing, ensure that the width and thickness of the breathable film are more accurate, and reduce the floor space; it includes a frame, a first stretching mechanism, a second stretching mechanism and an auxiliary tightening mechanism, the first stretching mechanism and the second stretching mechanism are fixedly installed on the front and rear of the frame respectively, the auxiliary tightening mechanism is installed in the middle of the frame, the first stretching mechanism and the second stretching mechanism both include a mounting seat, two groups of driving rollers, two groups of first driving cylinders, a pressure roller and a driving mechanism that provides power for the rotation of the two groups of driving rollers, the mounting seat is fixedly installed on the frame, the driving roller can be rotatably installed on the mounting seat, the two groups of first driving cylinders are fixedly installed on the mounting seat, and the pressure roller can be rotatably installed on the output ends of the two groups of first driving cylinders.

[0004] The above scheme is mainly aimed at the transverse stretching of the breathable membrane. When the breathable membrane is being stretched, the two ends are stretched, so the membranes on both sides will be stretched due to tension. During the continuous stretching process at both ends, the two ends of the breathable membrane will be warped and wrinkled. If only longitudinal flattening is set, the transverse contact during the flattening process will inevitably affect the stretching of the breathable membrane, affecting the normal stretching of the breathable membrane, and the side of the breathable membrane cannot be anti-wrinkle treated during the stretching process.

[0005] Therefore, it is necessary to provide an adjustable breathable film production stretching device and stretching method to solve the above technical problems. Summary of the invention

[0006] The object of the present invention is to provide an adjustable stretching device and stretching method for producing breathable membranes, so as to solve the problem raised in the above-mentioned background technology that when the breathable membrane is being stretched, the membranes on both sides will be stretched due to tension, and during the continuous stretching process at both ends, the two ends of the breathable membrane will be warped and wrinkled. If only longitudinal flattening is set, the lateral contact during the flattening process will inevitably affect the stretching of the breathable membrane, affect the normal stretching of the breathable membrane, and cannot perform anti-wrinkle treatment on the side of the breathable membrane during the stretching process.

[0007] Based on the above ideas, the present invention provides the following technical solutions: an adjustable breathable film production stretching device, comprising:

[0008] A support plate, the support plate is arranged on the ground, and both left and right sides of the top of the support plate are provided with transverse stretching mechanisms for stretching, and both sides of the two transverse stretching mechanisms are provided with exhaust mechanisms for exhausting air;

[0009] There are two fixed side plates, which are respectively arranged at the front and rear sides of the top of the support plate, an adjusting member for adjusting the spacing is arranged between the two fixed side plates, and two sets of symmetrically arranged transmission mechanisms are arranged on opposite sides of the two fixed side plates;

[0010] The longitudinal stretching mechanism is arranged in multiple groups and evenly arranged on the outside of the transmission mechanism. The longitudinal stretching mechanisms on the two groups of transmission mechanisms correspond to each other one by one and move in a circular motion through the transmission mechanism. The longitudinal stretching mechanism includes a connecting frame, and the connecting frame is fixed with an installation frame through an elastic member. A contact roller is rotatably connected inside the installation frame, and tensioning members for transmission are arranged on both sides of the contact roller.

[0011] As a further solution of the present invention: the transmission mechanism includes two transmission pulleys, the outer sides of the two transmission pulleys are fixedly connected with a rotating shaft, the rotating shaft passes through the fixed side plate and is rotatably connected to the fixed side plate, the two transmission pulleys are connected by a first transmission belt, the outer side of one of the rotating shafts is fixedly connected with a rotating gear, the rotating gears in the two groups of transmission mechanisms are meshed with each other, the outer side of the fixed side plate is fixedly connected with a circular ring, and the outer side of the circular ring is provided with teeth.

[0012] As a further solution of the present invention: the longitudinal stretching mechanism also includes a transmission gear arranged on one side close to the fixed side plate, the transmission gear is meshed with the circular ring through teeth, a support rod is fixedly connected to one side of the transmission gear, the support rod passes through the connecting frame and is rotatably connected to the connecting frame, one end of the support rod is fixedly connected to a first bevel gear, the outer side of the first bevel gear is meshed with a second bevel gear, the inside of the second bevel gear is fixedly connected to a rotating rod, the rotating rod passes through the connecting frame and is rotatably connected to the connecting frame.

[0013] As a further solution of the present invention: the tensioning member includes a second pulley fixedly connected to one end of the contact roller, a first pulley is fixedly connected to one end of the rotating rod, a mounting plate is fixedly connected to the outer side of the connecting frame, a movable plate is provided on one side of the mounting plate, a third pulley is rotatably connected to one side of the movable plate, the first pulley, the second pulley and the outer sides of the third pulley are connected by a second transmission belt, and a second telescopic rod and a second spring are fixedly connected between the mounting plate and the movable plate.

[0014] As a further solution of the present invention: the elastic member includes a first spring and a third telescopic rod, and two ends of the first spring and the third telescopic rod are fixedly connected to the installation frame and the connecting frame respectively.

[0015] As a further solution of the present invention: a plurality of the connecting frames are fixedly connected to the outside with straight rods, one end of the straight rods is fixedly connected to a touch switch, the outside of the installation frame is fixedly connected to an electromagnet, and the magnetic attraction of two relative electromagnets is controlled by the touch switch.

[0016] As a further solution of the present invention: the transverse stretching mechanism includes a stretching roller, both ends of the stretching roller are rotatably connected to the first support plate, the first support plate is fixedly connected to the support plate, the outer side of the first support plate is fixedly connected to the first motor, the output end of the first motor is fixedly connected to the stretching roller, an auxiliary roller is arranged on the upper part of the stretching roller, both ends of the auxiliary roller are rotatably connected to the connecting blocks, and a hydraulic telescopic rod is fixedly connected between the connecting block and the first support plate.

[0017] As a further solution of the present invention: the exhaust mechanism includes two connecting frames symmetrically arranged in an upper and lower manner, the two connecting frames are fixedly connected with a second support plate at both ends, the second support plate is fixedly connected to the support plate, openings are provided on opposite sides of the two connecting frames, a plurality of guide plates are rotatably connected inside the connecting frame, the outer sides of the plurality of guide plates are fixedly connected with connecting shafts, an arc groove is provided on the outer side of the connecting frame, the connecting shaft passes through the arc groove, a pushing frame is provided on the outer side of the connecting frame, the connecting shaft extends to the inside of the pushing frame, a fixed plate is fixedly connected between the two pushing frames, a second hydraulic telescopic rod is fixedly connected between the fixed plate and the second support plate, a connecting air pipe is provided inside the connecting frame, a plurality of nozzles are provided on the outer side of the connecting air pipe, a heating device and a cooling device are respectively provided on the outer sides of the two exhaust mechanisms, and the output ends of the heating device and the cooling device are respectively fixedly connected to the connecting air pipes in the two groups of exhaust mechanisms.

[0018] As a further solution of the present invention: the adjustment includes a bidirectional screw rod that passes through the two fixed side plates and is connected to the fixed side plates through a ball nut pair, two limit rods are fixedly connected to the top of the support plate, the limit rods pass through the two fixed side plates and are slidably connected to the fixed side plates, a second motor is fixedly connected to the top of the support plate, and the output end of the second motor is fixedly connected to the bidirectional screw rod.

[0019] The present invention also provides a stretching method for producing an adjustable breathable film, comprising the following steps:

[0020] S1, passing the breathable membrane through the two sets of transverse stretching mechanisms and exhaust mechanisms on the top of the support plate in sequence;

[0021] S2, heating the breathable membrane through one of the exhaust mechanisms, stretching the breathable membrane transversely through two sets of transverse stretching mechanisms with different rotation speeds, and stretching the breathable membrane longitudinally through two sets of transmission mechanisms on the fixed side plates driving multiple sets of longitudinal stretching mechanisms corresponding to each other;

[0022] S3, cooling the breathable membrane through another exhaust mechanism.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The output end of the servo motor is fixedly connected to another rotating shaft, and then the rotating shaft drives the transmission pulley to rotate. The two transmission pulleys are transmitted through the first transmission belt, and the transmission is transmitted through the rotating gear on the other rotating shaft, so that the two first transmission belts rotate synchronously, and the longitudinal stretching mechanisms on the two first transmission belts clamp the breathable membrane up and down one by one, so as to avoid the breathable membrane from becoming narrower due to stretching, resulting in wrinkles.

[0025] 2. The transmission gear drives the first bevel gear to rotate through the support rod, and the first bevel gear drives the rotating rod of the second bevel gear rotating belt to rotate, and then transmits the information through the first pulley, the third pulley and the second transmission belt outside the second pulley, so that the two contact rollers rotate relative to each other, stretching both sides of the breathable membrane to eliminate wrinkles, and the second spring sleeved on the outside of the second telescopic rod pulls the movable plate to keep the second transmission belt always taut, so that the contact rollers can contact breathable membranes of different thicknesses. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0027] Figure 1 It is an overall schematic diagram of the present invention;

[0028] Figure 2 It is a schematic diagram of the transmission mechanism structure of the present invention;

[0029] Figure 3 It is a schematic structural diagram of the transmission pulley of the present invention;

[0030] Figure 4 It is a schematic diagram of the structure of the longitudinal stretching mechanism of the present invention;

[0031] Figure 5 It is a bottom view structural schematic diagram of the longitudinal stretching mechanism of the present invention;

[0032] Figure 6 It is a schematic diagram of the structure of the adjusting member of the present invention;

[0033] Figure 7 It is a schematic diagram of the structure of the transverse stretching mechanism of the present invention;

[0034] Figure 8 It is a schematic diagram of the exhaust mechanism structure of the present invention;

[0035] Fig. 9 The present invention Figure 8 A schematic diagram of the enlarged structure of part B;

[0036] Fig.10 The present invention Figure 3 Schematic diagram of the enlarged structure of part A.

[0037] In the figure: 1, support plate; 2, fixed side plate; 3, transverse stretching mechanism; 301, stretching roller; 302, first support plate; 303, auxiliary roller; 304, connecting block; 305, hydraulic telescopic rod; 306, first motor; 4, exhaust mechanism; 401, second support plate; 402, connecting frame; 403, connecting air pipe; 404, nozzle; 405, guide plate; 406, arc groove; 407, connecting shaft; 408, pushing frame; 409, fixed plate; 410, second hydraulic telescopic rod; 501, transmission pulley; 502, first transmission belt; 503, return ring; 504, rotating gear; 505, rotating Moving shaft; 601, connecting frame; 602, contact roller; 603, mounting frame; 604, transmission gear; 605, rotating rod; 606, first bevel gear; 607, second bevel gear; 608, first pulley; 609, second pulley; 610, second transmission belt; 611, moving plate; 612, third pulley; 613, mounting plate; 614, second telescopic rod; 615, first spring; 616, third telescopic rod; 701, straight rod; 702, touch switch; 703, electromagnet; 801, limit rod; 802, bidirectional screw rod; 803, second motor; 9, heating device; 10, cooling device. DETAILED DESCRIPTION

[0038] like Figures 1 to 10 As shown, a stretching device for producing an adjustable breathable film includes the following embodiments.

[0039] like Figures 1 to 10 As shown, in the first embodiment, a support plate 1 is arranged on the ground, and a transverse stretching mechanism 3 for stretching is arranged on both sides of the top of the support plate 1, and an exhaust mechanism 4 for exhausting air is arranged on one side of the two transverse stretching mechanisms 3;

[0040] There are two fixed side plates 2, which are respectively arranged at the front and rear sides of the top of the support plate 1, and an adjusting member for adjusting the spacing is arranged between the two fixed side plates 2. Two sets of symmetrically arranged transmission mechanisms are arranged on opposite sides of the two fixed side plates 2;

[0041] The longitudinal stretching mechanism is provided in multiple groups and evenly arranged on the outside of the transmission mechanism. The longitudinal stretching mechanisms on the two groups of transmission mechanisms correspond to each other one by one and move in a circular motion through the transmission mechanism. The longitudinal stretching mechanism includes a connecting frame 601. The connecting frame 601 is fixed with a mounting frame 603 through an elastic member. The mounting frame 603 is internally rotatably connected with a contact roller 602. Tensioning members for transmission are arranged on both sides of the contact roller 602.

[0042] During specific implementation, the breathable membrane is sequentially passed through the two groups of transverse stretching mechanisms 3 and the exhaust mechanism 4 on the top of the support plate 1, and the breathable membrane is heated by one of the exhaust mechanism 4, and the breathable membrane is transversely stretched by the two groups of transverse stretching mechanisms 3 with different rotation speeds, and the breathable membrane is longitudinally stretched by driving multiple groups of one-to-one corresponding longitudinal stretching mechanisms through two groups of transmission mechanisms on the fixed side plate 2, and the contact roller 602 on the mounting frame 603 contacts the two sides of the breathable membrane. When the breathable membrane is transversely stretched, the breathable membrane will inevitably be wrinkled on both sides due to the stretching at both ends. Therefore, the contact roller 602 is used to stretch the breathable membrane with both sides to avoid wrinkles during the stretching process, and the transmission mechanism is cooperated to drive the longitudinal stretching mechanism to move together with the breathable membrane.

[0043] like Figure 2 As shown, the transmission mechanism includes two transmission pulleys 501, and the outer sides of the two transmission pulleys 501 are fixedly connected with rotating shafts 505. The rotating shafts 505 penetrate the fixed side plate 2 and are rotatably connected to the fixed side plate 2. The two transmission pulleys 501 are connected for transmission via a first transmission belt 502, and the outer side of one of the rotating shafts 505 is fixedly connected with a rotating gear 504. The rotating gears 504 in the two sets of transmission mechanisms are meshed with each other, and the outer side of the fixed side plate 2 is fixedly connected with a circular ring 503, and the outer side of the circular ring 503 is provided with teeth.

[0044] It is worth noting that the two drive pulleys 501 and the first drive belt 502 in the transmission mechanism can also be replaced by sprockets and chains.

[0045] During specific implementation, a servo motor is additionally provided on the outer side of the fixed side plate 2, and the output end of the servo motor is fixedly connected to another rotating shaft 505, so that the rotating shaft 505 drives the transmission pulley 501 to rotate, and the two transmission pulleys 501 are transmitted through the first transmission belt 502, and the transmission is transmitted through the rotating gear 504 on the other rotating shaft 505, so that the two first transmission belts 502 rotate synchronously, and the longitudinal stretching mechanisms on the two first transmission belts 502 clamp the breathable membrane up and down one by one, so as to prevent the breathable membrane from becoming narrower due to stretching, resulting in wrinkles.

[0046] like Figure 4As shown, further, the elastic member includes a first spring 615 and a third telescopic rod 616, and both ends of the first spring 615 and the third telescopic rod 616 are fixedly connected to the installation frame 603 and the connecting frame 601 respectively.

[0047] In specific implementation, since the first spring 615 and the third telescopic rod 616 are provided between the installation frame 603 and the connecting frame 601 , the first spring 615 pushes the installation frame 603 , so that the two contact rollers 602 can tightly clamp the breathable membrane up and down.

[0048] Furthermore, a plurality of connecting frames 601 are fixedly connected to the outside with straight rods 701, one end of the straight rods 701 is fixedly connected to a touch switch 702, and an electromagnet 703 is fixedly connected to the outside of the mounting frame 603, and the touch switch 702 controls the magnetic attraction of two relative electromagnets 703.

[0049] In a specific implementation, when the two first transmission belts 502 are continuously transmitting, the straight rods 701 on the two connecting frames 601 will be relatively squeezed. When the two straight rods 701 squeeze the touch switches 702 at one end, the touch switches 702 are triggered, and the electromagnets 703 are energized at this time, so that the two electromagnets 703 are adsorbed against each other, thereby improving the clamping effect of the contact roller 602 on the breathable membrane and making it clamped more tightly. When the two connecting frames 601 are moved away from each other, the two touch switches 702 are no longer squeezed, and the electromagnets 703 are no longer adsorbed.

[0050] like Figure 4 - Figure 5 As shown, embodiment 2: the longitudinal stretching mechanism also includes a transmission gear 604 arranged on one side close to the fixed side plate 2, the transmission gear 604 is meshed with the circular ring 503 through teeth, a support rod is fixedly connected to one side of the transmission gear 604, the support rod passes through the connecting frame 601 and is rotatably connected to the connecting frame 601, one end of the support rod is fixedly connected to a first bevel gear 606, the outer side of the first bevel gear 606 is meshed with a second bevel gear 607, the inside of the second bevel gear 607 is fixedly connected to a rotating rod 605, the rotating rod 605 passes through the connecting frame 601 and is rotatably connected to the connecting frame 601.

[0051] The tensioning member includes a second pulley 609 fixedly connected to one end of the contact roller 602, a first pulley 608 fixedly connected to one end of the rotating rod 605, a mounting plate 613 fixedly connected to the outer side of the connecting frame 601, a movable plate 611 is provided on one side of the mounting plate 613, and a third pulley 612 is rotatably connected to one side of the movable plate 611. The outer sides of the first pulley 608, the second pulley 609 and the third pulley 612 are connected for transmission by providing a second transmission belt 610, and a second telescopic rod 614 and a second spring are fixedly connected between the mounting plate 613 and the movable plate 611.

[0052] In specific implementation, when the connecting frame 601 is fixedly connected to the outer side of the first transmission belt 502 and transmits along with the first transmission belt 502, the transmission gear 604 meshes with the teeth set on the circular ring 503, so that the transmission gear 604 rotates, and the transmission gear 604 drives the first bevel gear 606 to rotate through the support rod, and the first bevel gear 606 drives the rotating rod 605 of the second bevel gear 607 to rotate, and then transmits through the first pulley 608, the third pulley 612 and the second transmission belt 610 outside the second pulley 609, so that the two contact rollers 602 rotate relative to each other, stretching both sides of the breathable membrane to eliminate wrinkles, and when the installation frame 603 moves under the magnetic attraction of the elastic member and the electromagnet 703 of the first embodiment, the second spring sleeved on the outer side of the second telescopic rod 614 pulls the movable plate 611, so that the second transmission belt 610 is always kept taut, so that the contact roller 602 can contact breathable membranes of different thicknesses.

[0053] like Figure 6 As shown, further, the adjustment includes a bidirectional screw 802 that passes through the two fixed side plates 2 and is connected to the fixed side plates 2 through a ball nut pair, two limit rods 801 are fixedly connected to the top of the support plate 1, the limit rods 801 pass through the two fixed side plates 2 and are slidably connected to the fixed side plates 2, and a second motor 803 is fixedly connected to the top of the support plate 1, and the output end of the second motor 803 is fixedly connected to the bidirectional screw 802.

[0054] During specific implementation, by starting the second motor 803, the second motor 803 drives the two fixed side plates 2 to move relative to each other, so that the two fixed side plates 2 can be used for breathable membranes of different widths, thereby increasing the scope of use.

[0055] like Figure 7 - Fig. 9 As shown, embodiment three: the lateral stretching mechanism 3 includes a stretching roller 301, both ends of the stretching roller 301 are rotatably connected to the first support plate 302, the first support plate 302 is fixedly connected to the support plate 1, the outer side of the first support plate 302 is fixedly connected to the first motor 306, the output end of the first motor 306 is fixedly connected to the stretching roller 301, an auxiliary roller 303 is arranged on the upper part of the stretching roller 301, both ends of the auxiliary roller 303 are rotatably connected to the connecting block 304, and a hydraulic telescopic rod 305 is fixedly connected between the connecting block 304 and the first support plate 302.

[0056] The exhaust mechanism 4 includes two connection frames 402 symmetrically arranged in an upper and lower direction, the two connection frames 402 are fixedly connected with the second support plate 401 at both ends, the second support plate 401 is fixedly connected to the support plate 1, the two connection frames 402 are provided with openings on opposite sides, a plurality of guide plates 405 are rotatably connected inside the connection frame 402, the outer sides of the plurality of guide plates 405 are fixedly connected with a connection shaft 407, an arc groove 406 is opened on the outer side of the connection frame 402, the connection shaft 407 passes through the arc groove 406, and a push frame 408 is provided on the outer side of the connection frame 402 The connecting shaft 407 extends to the inside of the pushing frame 408, a fixing plate 409 is fixedly connected between the two pushing frames 408, a second hydraulic telescopic rod 410 is fixedly connected between the fixing plate 409 and the second support plate 401, a connecting air pipe 403 is arranged inside the connecting frame 402, a plurality of nozzles 404 are arranged on the outside of the connecting air pipe 403, a heating device 9 and a cooling device 10 are respectively arranged on the outside of the two exhaust mechanisms 4, and the output ends of the heating device 9 and the cooling device 10 are respectively fixedly connected to the connecting air pipes 403 in the two groups of exhaust mechanisms 4.

[0057] In specific implementation, by starting the first motors 306 on the two transverse stretching mechanisms 3, the output ends of the two first motors 306 have different rotation speeds, thereby forming a differential speed, and then the breathable membrane is stretched, and by starting the hydraulic telescopic rod 305, the hydraulic telescopic rod 305 pushes the connecting block 304, and the auxiliary roller 303 between the two connecting blocks 304 squeezes the upper part of the breathable membrane.

[0058] Before the breathable membrane is stretched, the membrane passes between the two connecting frames 402 in the exhaust mechanism 4, and the heating device 9 is started to discharge hot air from the heating device 9, which is discharged through the nozzle 404 on the outside of the connecting air pipe 403, thereby heating the membrane for later stretching. The second hydraulic telescopic rod 410 is started to move back and forth, and the second hydraulic telescopic rod 410 pushes the fixed plate 409, and the fixed plate 409 drives the pushing frame 408, so that the pushing frame 408 pushes the multiple connecting shafts 407 inside the connecting frame 402 to swing, and adjusts the air outlet angle of the nozzle 404, so as to evenly heat the surface of the membrane. When the stretching is completed, a cooling device 10 is set on the outside of the other exhaust mechanism 4, and cold air is discharged through the cooling device 10, so as to cool and shape the membrane.

Claims

1. An adjustable breathable film stretching device, characterized in that: include: A support plate (1), the support plate (1) being arranged on the ground, and the left and right sides of the top of the support plate (1) are both provided with transverse stretching mechanisms (3) for stretching, and one side of the two transverse stretching mechanisms (3) is both provided with exhaust mechanisms (4) for exhausting air; The fixed side plates (2) are provided in two pieces, the two fixed side plates (2) are respectively provided at the front and rear sides of the top of the support plate (1), an adjusting member for adjusting the spacing is provided between the two fixed side plates (2), and two sets of symmetrically arranged transmission mechanisms are provided on opposite sides of the two fixed side plates (2); A longitudinal stretching mechanism, wherein the longitudinal stretching mechanism is arranged in multiple groups and is evenly arranged outside the transmission mechanism, the longitudinal stretching mechanisms on the two groups of transmission mechanisms correspond to each other one by one, and move in a circular motion through the transmission mechanism, the longitudinal stretching mechanism comprises a connecting frame (601), the connecting frame (601) is fixed with a mounting frame (603) through an elastic member, the mounting frame (603) is rotatably connected with a contact roller (602) inside, and tensioning members for transmission are arranged on both sides of the contact roller (602); The transmission mechanism comprises two transmission pulleys (501), the outer sides of the two transmission pulleys (501) are fixedly connected to a rotating shaft (505), the rotating shaft (505) passes through the fixed side plate (2) and is rotationally connected to the fixed side plate (2), the two transmission pulleys (501) are transmission-connected via a first transmission belt (502), the outer side of one of the rotating shafts (505) is fixedly connected to a rotating gear (504), the rotating gears (504) in the two sets of transmission mechanisms are meshed with each other, the outer side of the fixed side plate (2) is fixedly connected to a circular ring (503), and the outer side of the circular ring (503) is provided with teeth; The longitudinal stretching mechanism further comprises a transmission gear (604) arranged on a side close to the fixed side plate (2), the transmission gear (604) being meshedly connected to the circular ring (503) via teeth, a support rod being fixedly connected to one side of the transmission gear (604), the support rod passing through the connecting frame (601) and being rotatably connected to the connecting frame (601), a first bevel gear (606) being fixedly connected to one end of the support rod, a second bevel gear (607) being meshedly connected to the outer side of the first bevel gear (606), a rotating rod (605) being fixedly connected to the inner side of the second bevel gear (607), the rotating rod (605) passing through the connecting frame (601) and being rotatably connected to the connecting frame (601); The tensioning member comprises a second pulley (609) fixedly connected to one end of the contact roller (602); one end of the rotating rod (605) is fixedly connected to the first pulley (608); the outer side of the connecting frame (601) is fixedly connected to a mounting plate (613); a movable plate (611) is provided on one side of the mounting plate (613); a third pulley (612) is rotatably connected to one side of the movable plate (611); the outer sides of the first pulley (608), the second pulley (609) and the third pulley (612) are connected in transmission by a second transmission belt (610); and a second telescopic rod (614) and a second spring are fixedly connected between the mounting plate (613) and the movable plate (611); The outer sides of the plurality of connection frames (601) are all fixedly connected with straight rods (701), one end of the straight rods (701) is all fixedly connected with a light touch switch (702), the outer side of the installation frame (603) is fixedly connected with an electromagnet (703), and the magnetic attraction of two opposing electromagnets (703) is controlled by the light touch switch (702).

2. The adjustable breathable film production stretching device according to claim 1, characterized in that: The elastic member comprises a first spring (615) and a third telescopic rod (616); two ends of the first spring (615) and the third telescopic rod (616) are respectively fixedly connected to the installation frame (603) and the connecting frame (601).

3. The adjustable breathable film production stretching device according to claim 1, characterized in that: The transverse stretching mechanism (3) comprises a stretching roller (301), both ends of the stretching roller (301) are rotatably connected to a first support plate (302), the first support plate (302) is fixedly connected to the support plate (1), a first motor (306) is fixedly connected to the outer side of the first support plate (302), an output end of the first motor (306) is fixedly connected to the stretching roller (301), an auxiliary roller (303) is arranged on the upper part of the stretching roller (301), both ends of the auxiliary roller (303) are rotatably connected to a connecting block (304), and a hydraulic telescopic rod (305) is fixedly connected between the connecting block (304) and the first support plate (302).

4. The adjustable breathable film production stretching device according to claim 1, characterized in that: The exhaust mechanism (4) comprises two connection frames (402) symmetrically arranged in an upper and lower direction, the two connection frames (402) are fixedly connected to the second support plates (401) at both ends, the second support plates (401) are fixedly connected to the support plate (1), the two connection frames (402) are provided with openings on opposite sides, a plurality of guide plates (405) are rotatably connected inside the connection frames (402), the outer sides of the plurality of guide plates (405) are fixedly connected to connection shafts (407), an arc groove (406) is provided on the outer side of the connection frames (402), the connection shaft (407) passes through the arc groove (406), and a pushing frame (408) is provided on the outer side of the connection frames (402). The connecting shaft (407) extends into the interior of the pushing frame (408); a fixing plate (409) is fixedly connected between the two pushing frames (408); a second hydraulic telescopic rod (410) is fixedly connected between the fixing plate (409) and the second support plate (401); a connecting air pipe (403) is provided inside the connecting frame (402); a plurality of nozzles (404) are provided outside the connecting air pipe (403); a heating device (9) and a cooling device (10) are respectively provided outside the two exhaust mechanisms (4); and output ends of the heating device (9) and the cooling device (10) are respectively fixedly connected to the connecting air pipes (403) in the two sets of exhaust mechanisms (4).

5. The adjustable breathable film production stretching device according to claim 1, characterized in that: The adjusting member comprises a bidirectional screw (802) penetrating through the two fixed side plates (2) and connected to the fixed side plates (2) via a ball nut pair; two limit rods (801) are fixedly connected to the top of the support plate (1); the limit rods (801) penetrate through the two fixed side plates (2) and are slidably connected to the fixed side plates (2); a second motor (803) is fixedly connected to the top of the support plate (1); an output end of the second motor (803) is fixedly connected to the bidirectional screw (802).

6. A stretching method for producing an adjustable breathable film, applicable to the stretching device for producing an adjustable breathable film as described in any one of claims 1 to 5, characterized in that: The following steps are involved: S1, passing the breathable membrane through the two sets of transverse stretching mechanisms (3) and the exhaust mechanism (4) on the top of the support plate (1) in sequence; S2, heating the breathable membrane through one of the exhaust mechanisms (4), stretching the breathable membrane transversely through two sets of transverse stretching mechanisms (3) at different rotation speeds, and stretching the breathable membrane longitudinally through two sets of transmission mechanisms on the fixed side plate (2) driving multiple sets of longitudinal stretching mechanisms corresponding to each other; S3, cooling the breathable membrane through another exhaust mechanism (4).

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