A membrane cross-cut folding mechanism and its folding method

Abstract

The application relates to the field of filter elements, in particular to a diaphragm transverse cutting and folding mechanism and a folding method thereof. The mechanism mainly comprises a diaphragm unwinding unit, a guide roller, a traction gripper, a cutting and hot pressing unit, a folding platform, a diaphragm lifting unit, a diaphragm and coarse mesh traction unit and a coarse mesh pressing unit. The traction gripper drags the continuous diaphragm to a proper length, the cutting and hot pressing unit is suitable for cutting and hot pressing the continuous diaphragm, the traction gripper drags the cut diaphragm to the folding platform, the coarse mesh pressing unit is suitable for pressing the coarse mesh and the diaphragm on the folding platform to adhere, the diaphragm and coarse mesh traction unit drags the coarse mesh and the diaphragm to move and position the folding point, the diaphragm lifting unit lifts the diaphragm end to the highest position and reversely moves synchronously with the diaphragm and coarse mesh traction unit, the diaphragm is bent around the folding center shaft, then the diaphragm lifting unit is lowered to the zero position and releases the diaphragm end, so that the folding of the single diaphragm is completed. The application solves the problem of low production line working efficiency caused by manual folding.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of filter cartridges, in particular to a membrane cross-cut folding mechanism and a folding method thereof. BACKGROUND

[0002] Filter cartridges can purify contaminated media to achieve the clean state required for production and life, and have a certain degree of cleanliness. Filter cartridges have a very wide range of applications, from large-scale industrial production such as steel smelting, power production, and ocean purification, to small-scale applications such as drinking water treatment, waste disposal, and automobile fuel filtration. Therefore, clean technology is used in daily life with filters and filter cartridges.

[0003] In the manufacturing process of industrial filter cartridges, multiple layers of flow guide cloth need to be welded together, and the first layer of flow guide cloth is welded with the center tube. Before the flow guide cloth is wound, the folded membrane is placed between the two adjacent layers of flow guide cloth. The so-called folded membrane refers to folding the reverse osmosis membrane in half, and placing a coarse mesh between the folded reverse osmosis membranes. Only after the folded membrane is placed between the flow guide cloth, can the flow guide cloth with the folded membrane be wound around the center tube, and then processed to form an industrial filter cartridge.

[0004] In the existing process, the welding of the center tube with the flow guide cloth and the folding of the membrane are completed in one station. In the winding station, the folded membrane is placed between the flow guide cloth one by one, and after all the folded membranes are placed, the structure is wound to form a filter cartridge. In particular, in the production line of the water purification industry, manual stacking and folding are mostly used, and the machine is used for winding, which makes the production efficiency low and the labor cost high. Manual folding may also cause material waste due to manual errors. In addition, due to the large number of specifications of filter cartridges in the production of filter cartridges, the length of the membrane and the coarse mesh required for each specification of filter cartridge is different. SUMMARY

[0005] In order to overcome the defects of the prior art, the purpose of the present application is to provide a membrane cross-cut folding mechanism and a folding method thereof, which is applied to filter cartridge automatic production equipment to solve the problems of low production line efficiency caused by manual folding and different membrane length requirements for different size filter cartridges in the prior art.

[0006] The application provides a diaphragm cross-cut folding mechanism for cutting and folding diaphragms, which mainly comprises a diaphragm lifting unit, a diaphragm and coarse mesh traction unit and a coarse mesh pressing unit, the coarse mesh pressing unit is suitable for pressing the coarse mesh and the diaphragm on the folding platform to adhere, the diaphragm and coarse mesh traction unit drives the coarse mesh and diaphragm to move and positions the folding point, the diaphragm lifting unit lifts the diaphragm end to the highest position and reversely moves synchronously with the diaphragm and coarse mesh traction unit, the diaphragm is bent around the folding center axis, and then the diaphragm lifting unit lowers to zero position and releases the diaphragm end to complete the folding of a single diaphragm.

[0007] Further, the diaphragm cross-cut folding mechanism further comprises a diaphragm unwinding unit, a guide roller, a traction gripper, a cutting and hot pressing unit and a folding platform, the traction gripper pulls the continuous diaphragm to an appropriate length, the cutting and hot pressing unit is suitable for cutting and hot pressing the continuous diaphragm, and the traction gripper pulls the cut diaphragm to the folding platform.

[0008] Further, the diaphragm unwinding unit stores a whole roll of diaphragm, the diaphragm is wound on the plurality of guide rollers and is pulled and moved by the traction gripper from the back according to the width of the filter core, the upper cutting and hot pressing unit divides the continuous diaphragm into single diaphragms by cutting the cylinder according to the appropriate length, the diaphragm end hot pressing device in the cutting and hot pressing unit performs hot pressing treatment on the diaphragm cutting part, and the traction gripper pulls the single diaphragm to the folding platform.

[0009] Further, the cutting and hot pressing unit comprises a cylinder, a cutting cylinder and a diaphragm end hot pressing device, the cylinder is located above the cutting cylinder and is used to drive the cutting cylinder to cut the continuous diaphragm downward, and the diaphragm end hot pressing device is installed on both sides of the cutting cylinder and is used to hot press the cutting part of the single diaphragm to prevent the cutting part from cracking.

[0010] Further, the guide roller comprises a first guide roller and a second guide roller, the first guide roller is located above the right side of the diaphragm unwinding unit and is used to pull out the continuous diaphragm on the diaphragm unwinding unit and change the vertical movement of the continuous diaphragm, and the second guide roller is located in the same horizontal plane as the folding platform and is used to flatten the continuous diaphragm to facilitate the cutting and hot pressing unit to uniformly cut the continuous diaphragm.

[0011] Further, the diaphragm lifting unit comprises a first servo motor, a first module, a second servo motor, a second module and a diaphragm lifting gripper installed on the first module, the first servo motor is installed on the top of the first module and is used to drive the diaphragm lifting gripper to move up and down as a whole, the first module is installed on the second module, the first module is perpendicular to the second module, and the second servo motor is installed on the end of the second module and is used to drive the first module and the diaphragm lifting gripper installed on the first module to move left and right as a whole.

[0012] Further, the film lifting gripper comprises a rotating cylinder, a first clamping jaw cylinder and a first clamping jaw, the first clamping jaw cylinder is provided with a first clamping jaw, which is used to drive the first clamping jaw to grip or release; the first clamping jaw cylinder is installed on the rotating cylinder through a center shaft, and the first clamping jaw cylinder and the first clamping jaw can rotate around the rotating cylinder.

[0013] Further, the film and coarse mesh traction unit comprises a mounting base, a telescopic cylinder, a second clamping jaw cylinder, a second clamping jaw and a folding center shaft, the mounting base is arranged on the same horizontal plane as the folding platform, the telescopic cylinder is installed on the mounting base and is used to push or retract the second clamping jaw cylinder and the second clamping jaw; the second clamping jaw cylinder is used to drive the second clamping jaw installed thereon to grip or release, the second clamping jaw is used to traction the film and the coarse mesh to move synchronously, and the folding center shaft is used to fold the film and determine the folding point.

[0014] Further, the coarse mesh pressing unit comprises a third servo motor, a third module, a third cylinder connected to the third module, a third clamping jaw, a coarse mesh pressing cylinder and a clamping jaw pressing cylinder, the third servo motor drives the whole structure connected to the third module to move, the clamping jaw pressing cylinder is installed on the third clamping jaw, the clamping jaw pressing cylinder and the third clamping jaw move synchronously with the third cylinder, the third cylinder is suitable for grabbing the coarse mesh when it is extended, the clamping jaw pressing cylinder is suitable for clamping the coarse mesh when it is extended, the third servo motor drives the third cylinder to lift the coarse mesh to a suitable position, and the coarse mesh pressing cylinder is suitable for pressing the coarse mesh and the film when it is extended.

[0015] In addition, the application also provides a film transverse cutting and folding method, mainly comprising the following steps:

[0016] The continuous film is tractioned to a suitable length, the continuous film is cut into a single film, and the film is tractioned to the folding platform;

[0017] The coarse mesh and the film are pressed, the coarse mesh and the film are tractioned to move and position the folding point, the end of the film is lifted to the highest position and moves reversely synchronously with the movement of the film and the coarse mesh, so that the film is folded around the folding center shaft;

[0018] The film and the coarse mesh are continuously tractioned to move, the end of the film gradually descends with the movement of the film and the coarse mesh, and the end of the film is released when it is lowered to zero position to complete the folding.

[0019] Further, the continuous film is cut into a single film, wherein the cutting cylinder is driven to cut the continuous film and heat-press the cutting part to prevent cracking.

[0020] Further, the coarse mesh and the film are pressed together, the coarse mesh is placed and grabbed at a low position, the coarse mesh is clamped and lifted to a suitable height, the coarse mesh pressing cylinder is driven to press the coarse mesh and the film to fit.

[0021] Further, the film is synchronously and reversely moved with the movement of the film and the coarse mesh, the film lifting unit grabs the end of the film and moves at a uniform speed along the X and Y directions, and the film lifting gripper rotates around the rotating cylinder.

[0022] Further, the included angle of the folding center axis on both sides is α; when α>90°, the end of the film is in a rising state; when α=90°, the end of the film rises to the highest position; when α<90°, the end of the film is in a descending state; and when α=0°, the film completes one folding.

[0023] Further, the folding point is the midpoint of the film.

[0024] As described above, the present application first completes the automatic placement of film pieces of different lengths through the film unwinding unit, the guide roller, the traction gripper and the cutting and hot pressing unit, and then realizes the automatic folding of the film and the insertion of the coarse mesh between the folded film by using the film lifting unit, the film and coarse mesh traction unit and the coarse mesh pressing unit.

[0025] The present application has the following beneficial effects:

[0026] The traction gripper of the present application can traction the continuous film to the required length for cutting and hot pressing to meet the length requirements of different filter cartridges, and has high adaptability, which can meet various specifications of filter cartridges on the market in actual production of filter cartridges.

[0027] The present application cooperates with the traction device, the film lifting unit, the film and coarse mesh traction unit and the coarse mesh pressing unit to complete the automatic folding of the film, which is precise and efficient, and greatly reduces the labor and material costs. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a schematic diagram of film cutting and placement in the present application;

[0029] Figure 2 It is a schematic diagram of coarse mesh and film folding in the present application;

[0030] Figure 3 、 Figure 4 It is a schematic diagram of the folding process of coarse mesh and film in the present application; wherein Figure 3 It indicates that the film lifting unit gradually rises to the highest position; Figure 4 It indicates that the film lifting unit is synchronously and reversely moved;

[0031] Figure 5 It is a schematic diagram of the film and coarse mesh traction unit structure in the present application;

[0032] Figure 6 Figure 1 is a schematic diagram of the film lifting unit in the present application.

[0033] Figure 7 Figure 2 is a schematic diagram of the folded film produced in the present application.

[0034] Figure 1 is a schematic diagram of the film lifting unit in the present application.

[0035] 1 - film lifting unit, 2 - film and coarse mesh pulling unit, 3 - coarse mesh pressing unit, 4 - continuous film, 4a - film, 5 - coarse mesh, 6 - cutting and pressing unit, 7 - folding platform, 8 - pulling gripper, 9 - guide roller, 10 - film unwinding unit.

[0036] 101 - first servo motor, 102 - first module, 103 - second servo motor, 104 - second module, 105 - rotary cylinder, 106 - first gripper cylinder, 107 - first gripper.

[0037] 201 - second gripper, 202 - second gripper cylinder, 203 - folding center shaft, 204 - telescopic cylinder, 205 - mounting base.

[0038] 301 - third servo motor, 302 - third module, 303 - third cylinder, 304 - third gripper, 305 - gripper pressing cylinder, 306 - coarse mesh pressing cylinder.

[0039] 601 - cylinder, 602 - cutting cylinder, 603 (603a, 603b) - film end pressing device.

[0040] 901 - first guide roller, 902 - second guide roller. Specific embodiments

[0041] The embodiments of the present application will be described in detail below with specific examples. Those skilled in the art can easily understand other advantages and effects of the present application from the disclosure. It should be noted that the drawings provided in the following examples only schematically illustrate the basic concept of the present application, and the following examples and features in the examples can be combined with each other without conflict.

[0042] The drawings are only used for exemplary illustration, and the representation is only a schematic diagram, not a physical diagram, and cannot be understood as a limitation on the present application; in order to better illustrate the embodiments of the present application, some components of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. If it is described as "first", "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0043] The present application provides a membrane cross-cut folding mechanism and its folding method, and applies it to filter core automatic production equipment to solve the problem of low work efficiency of manual folding and different scale filter core length requirements for membrane in the prior art.

[0044] Please refer to Figure 1 , Figure 1 in the present application, according to the specification requirements of the filter core, the continuous membrane 4 is unwound and pulled to a certain length, then cut into single membrane 4a, at the same time of cutting, the membrane edge is hot pressed to improve the quality of the membrane, finally the single membrane 4a is pulled to the folding platform by the pulling gripper 8, and then the subsequent coarse mesh folding steps are used.

[0045] As shown in the figure, in the present embodiment, the mechanism is mainly used for cutting and placing the continuous film 4. It mainly includes the film unwinding unit 10, the guide roller 9, the traction gripper 8, the cutting and hot pressing unit 6, and the folding platform 7. The whole roll of continuous film 4 is wound on the film unwinding unit 10, which is used as the raw material of the present application. The continuous film 4 can be unwound, flattened and transmitted through two guide rollers 901, 902. The first guide roller 901 is located above the right side of the film unwinding unit 10, so that the transmission direction of the continuous film 4 is vertically upward. The second guide roller 902 is located above the first guide roller 901, and the second guide roller 902 is at the same horizontal plane as the folding platform 7, so that the continuous film 4 is uniformly transmitted in the horizontal direction. Under the action of the traction force of the traction gripper 8, the continuous film 4 is flattened and taut, which is beneficial to the uniformity of the film size in the subsequent cutting. Of course, in actual production, considering the production environment and the quality of the film, multiple guide rollers can be arranged at different positions to unwind the film. The traction gripper 8 is a driving device for the continuous film 4, which is a conventional cylinder clamp or a motor-controlled mechanical hand. By controlling the traction gripper 8, the continuous film 4 is pulled to an appropriate length for cutting. The traction gripper 8 clamps the single film 4a after cutting and transports it to the folding platform for subsequent folding preparation. The cutting and hot pressing unit 6 includes a cylinder 601, a cutting cylinder 602 and a film end hot pressing device 603. The cutting and hot pressing unit 6 is located above the continuous film 4, which is used for cutting and hot pressing the single film 4a to improve the quality of the film 4a. The cutting cylinder 602 is driven by the cylinder 601. When the cylinder 601 is pressurized, it pushes the cutting cylinder 602 to move downward, quickly cutting the film into a single piece. The film end hot pressing device 603 is installed on the left and right sides of the cutting cylinder 602. When the film is cut, the film end hot pressing device 603 quickly presses downward to heat press the edge of the film, making the cutting edge smooth and preventing cracks from occurring at the cutting edge.

[0046] Please refer to 2-4, Figures 2-4 The folding process of the folded film 4a is shown. The coarse mesh pressing unit 3 grabs the coarse mesh 5 at a low position, lifts it to a certain height, and then presses the film 4a and the coarse mesh 5 into a state of close contact through the coarse mesh pressing cylinder 306. Then the film 4a and the coarse mesh 5 are lowered to the folding platform. The film and coarse mesh traction unit 2 clamps them and pulls them forward to position the folding point. The folding point is located at the midpoint of the film 4a. At this time, the film lifting unit 1 clamps the end of the film 4a and rises at a constant speed and moves in the opposite direction. The film and coarse mesh traction unit 2 continues to pull them forward. At this time, the film lifting unit 1 clamps the end of the film 4a and lowers it to zero at a constant speed, and then releases the end of the film 4a to complete the folding of the film 4a and the coarse mesh 5, forming a folded film.

[0047] As shown in the figure, in the present embodiment, the mechanism is mainly used for the folding of the single film 4a and the coarse mesh 5. The mechanism mainly comprises a film lifting unit 1, a film and coarse mesh pulling unit 2 and a coarse mesh pressing unit 3. The coarse mesh pressing unit 3 comprises a third servo motor 301, a third module 302, a third cylinder 303 connected to the third module 302, a third gripper 304, a gripper pressing cylinder 305 and a coarse mesh pressing cylinder 306, which can be regarded as structures connected to the third module 302; the gripper pressing cylinder 305 is installed on the third gripper 304, and the gripper pressing cylinder 305 and the third gripper 304 move synchronously with the third cylinder 303; when it is needed to grab the coarse mesh 5 downward, the third cylinder 303 is pressurized, at this time the third gripper 304 extends with the descent of the third cylinder 303 to realize the low-position grabbing of the coarse mesh 5; the gripper pressing cylinder 305 is pressurized, the gripper pressing cylinder 305 extends downward to clamp the coarse mesh 5, and then the third cylinder 303 is released, at this time the third gripper 304 retracts with the ascent of the third cylinder 303 to realize the lifting of the coarse mesh 5; the third servo motor 301 drives the structures connected to the third module 302 to move as a whole, so that the third gripper 304 pulls the coarse mesh 5 to a suitable position; the coarse mesh pressing cylinder 306 is pressurized, and the coarse mesh pressing cylinder 306 extends to press the coarse mesh 5 and the film 4a to adhere. The film and coarse mesh pulling unit 2 is used to pull the film 4a and the coarse mesh 5 to a suitable position and determine the folding center. The film lifting unit comprises a first servo motor 101, a first module 102, a second servo motor 103, a second module 104 and a film lifting gripper installed on the first module. The first servo motor 101 is installed on the top of the first module 102, when the film lifting gripper clamps the end of the film 4, the first servo motor 101 controls the film lifting gripper to slide uniformly along the Y direction on the first module 102 to the highest position; at the same time, the second servo motor 103 controls the first module 102 and the film lifting gripper to slide uniformly along the X direction on the second module 104; as the folding center axis 203 of the film and coarse mesh pulling unit 2 is gradually pulled to the folding point, the first servo motor 101 controls the film lifting gripper to slide uniformly along the Y negative direction on the first module 102 to zero position. The included angle between the two sides of the folding center axis gradually changes from 180° to 0° to complete the first folding of the film.

[0048] Please refer to Figure 5 , Figure 5The film and coarse mesh traction unit structure is shown, mainly including mounting base 205, telescopic cylinder 204, second jaw cylinder 202, second jaw 201 and folding center shaft 203. The mounting base 205 is mounted on the same horizontal plane as the folding platform, facilitating the second jaw 201 to grab the film and coarse mesh; the telescopic cylinder 204 is mounted on the mounting base 205, and pressurizing or depressurizing the telescopic cylinder 204 is used to push or retract the second jaw cylinder 202 and the second jaw 201; the second jaw cylinder 202 is used to drive the second jaw 201 mounted thereon, and pressurizing or depressurizing the second jaw cylinder 202 causes the second jaw 201 to clamp or release, so as to realize synchronous movement of the film and coarse mesh; the folding center shaft 203 is located on the second jaw 201, and after the folding point is determined, the film 4a is folded around the folding center shaft 203 as the X-direction movement of the film lifting unit 1.

[0049] Please refer to Figure 6 , Figure 6 The structure of the film lifting gripper is shown. The film lifting gripper includes rotary cylinder 105, first jaw cylinder 106 and first jaw 107, the first jaw cylinder 106 is provided with first jaw 107, which is used to drive the first jaw 107 to clamp or release; the first jaw cylinder 106 is mounted on the rotary cylinder 105 through a center shaft, which can be a bearing or other mechanism for rotation, when the first jaw 107 moves by clamping the end of the film, the first jaw cylinder 106 and the first jaw 107 can rotate around the rotary cylinder 105.

[0050] The film transverse cutting and folding method in this embodiment mainly includes the following steps:

[0051] S1: pull the continuous film to an appropriate length, cut the continuous film into a single film, and pull the film to the folding platform;

[0052] S2: press the coarse mesh and the film, pull the coarse mesh and the film to position the folding point, clamp the end of the film to the highest position and move synchronously and reversely with the movement of the film and the coarse mesh, so that the film is folded around the folding center shaft;

[0053] S3: continue to pull the film and the coarse mesh to move, the end of the film gradually descends with the movement of the film and the coarse mesh, and the end of the film is released when it descends to zero position, completing the folding.

[0054] Please refer to Figures 2-4 , Figures 2-4The whole process of crosswise folding of the film sheet is shown. The traction gripper 8 pulls the continuous film sheet 4 to a proper length, the pulling length is determined according to the filter core specification, the cutting and hot pressing unit 6 is located above the continuous film sheet 4, which cuts and hot presses the single film sheet 4a, improves the quality of the film sheet 4a, the cutting cylinder 602 is driven by the cylinder 601, when the cylinder 601 is pressurized, it pushes the cutting cylinder 602 to move downward, quickly cuts the single film sheet; the film sheet end hot pressing device 603 is installed on the left and right sides of the cutting cylinder 602, when the film sheet is cut, the film sheet end hot pressing device 603 quickly presses downward, and the film sheet edge is hot pressed to make the cutting edge smooth and prevent the cutting edge from cracking. The traction gripper 8 pulls the cut film sheet 4a to the folding platform. When it is necessary to grab the coarse mesh 5 downward, the third cylinder 303 is pressurized, and the third gripper 304 is extended at this time to realize the low position grabbing of the coarse mesh 5; the gripper compression cylinder 305 is pressurized, the coarse mesh 5 is clamped by the downward extension of the coarse mesh compression cylinder 306, and then the third cylinder 303 is released, and the third gripper 304 is retracted to realize the lifting of the coarse mesh 5; the third servo motor 301 drives the structure connected to the third module 302 to move as a whole, so that the third gripper 304 pulls the coarse mesh 5 to a suitable position; the coarse mesh compression cylinder 306 is pressurized, and the coarse mesh 5 is pressed to adhere to the film sheet 4a. The film sheet and coarse mesh traction unit 2 pulls the film sheet 4a and the coarse mesh 5 to a suitable position and determines the folding center, which is the midpoint of the film sheet 4a. As the film sheet and coarse mesh traction unit 2 structure continues to pull forward, the first servo motor 101 controls the film lifting gripper to rise at a constant speed along Y on the first module 102, and the second servo motor 103 controls the first module 102 and the film lifting gripper to move at a constant speed along X on the second module 104, during which the included angle α between the folding center axis on both sides gradually decreases, at this time α is greater than 90°; when the film lifting gripper clamps the end of the film sheet 4a and slides at a constant speed to the highest position, at this time α is equal to 90°; the film sheet and coarse mesh traction unit 2 continues to move the film sheet and coarse mesh, the first servo motor 101 controls the film lifting gripper to descend at a constant speed along Y on the first module 102, at this time α is less than 90°. During the movement of the film sheet end, the first gripper cylinder 106 and the first gripper 107 rotate around the rotating cylinder 105, and the included angle between the folding center axis on both sides gradually changes from 180° to 0° to complete the first folding of the film sheet 4a.

Claims

1. A membrane cross-cutting and folding mechanism for cutting and folding a membrane, characterized in that: include: A film lifting unit, a film sheet and coarse mesh traction unit and a coarse mesh pressing unit. The coarse mesh pressing unit is suitable for pressing the coarse mesh and the film sheet on the folding platform until they are in contact. The film sheet and coarse mesh traction unit pulls the coarse mesh and film sheet to move and locate the folding point. The film lifting unit grasps the end of the film sheet and lifts it to the highest position and moves in the opposite direction synchronously with the movement of the film sheet and coarse mesh traction unit. The film sheet is bent around the folding center axis. Then the film lifting unit drops to zero position and releases the end of the film sheet to complete the folding of a single film sheet. The film sheet and coarse mesh traction unit It includes a mounting base, a telescopic cylinder, a second clamping cylinder, a second clamping jaw and a folding center axis. The mounting base is set to be on the same horizontal plane as the folding platform. The telescopic cylinder is installed on the mounting base, and is used to push or retract the second clamping cylinder and the second clamping jaw; the second clamping jaw cylinder is used to drive the second clamping jaw installed thereon to grasp or release, and the second clamping jaw is used to pull the diaphragm and the coarse mesh to move synchronously. The folding center axis is located on the second clamping jaw, and the folding center axis is used to fold the diaphragm and determine the folding point.

2. The membrane cross-cutting and folding mechanism according to claim 1, further comprising: The film unwinding unit, guide roller, traction gripper, cutting and hot pressing unit and folding platform are characterized in that the traction gripper pulls the continuous film to an appropriate length, the cutting and hot pressing unit is suitable for cutting and hot pressing the continuous film, and the traction gripper pulls the cut film to the folding platform.

3. The membrane cross-cutting and folding mechanism according to claim 2, characterized in that: A whole roll of diaphragm is stored on the diaphragm unwinding unit, and the diaphragm is wound and unwound on multiple guide rollers and pulled and moved from the back by the traction gripper according to the width of the filter element. The cutting and hot pressing unit located above divides the continuous diaphragm into single diaphragms according to appropriate lengths through the cutting cylinder. The diaphragm end hot pressing device in the cutting and hot pressing unit performs hot pressing treatment on the cut part of the diaphragm, and the traction gripper pulls the single diaphragm onto the folding platform.

4. The membrane cross-cutting and folding mechanism according to claim 2, characterized in that: The cutting and hot pressing unit includes a cylinder, a cutting cylinder and a diaphragm end hot pressing device. The cylinder is located above the cutting cylinder and is used to drive the cutting cylinder downward to cut the continuous diaphragm; the diaphragm end hot pressing device is installed on both sides of the cutting cylinder and is used to hot press the cutting part of a single diaphragm to prevent cracking at the dividing part.

5. The membrane cross-cutting and folding mechanism according to claim 2, characterized in that: The guide roller includes a first guide roller and a second guide roller. The first guide roller is located above the right side of the film unwinding unit. It is used to pull out the continuous film on the film unwinding unit and change the direction of the continuous film so that the continuous film moves in the vertical direction. The second guide roller is located on the same horizontal plane as the folding platform. It is used to flatten the continuous film to facilitate the cutting and hot pressing unit to evenly cut the continuous film.

6. The membrane cross-cutting and folding mechanism according to claim 1, characterized in that: The film-lifting unit includes a first servo motor, a first module, a second servo motor, a second module and a film-lifting gripper installed on the first module. The first servo motor is installed on the top of the first module, and is used to drive the film-lifting gripper to move up and down as a whole; the first module is installed on the second module, and the first module is perpendicular to the second module; the second servo motor is installed at the end of the second module, and is used to drive the first module and the film-lifting gripper installed on the first module to move left and right as a whole.

7. The membrane cross-cutting and folding mechanism according to claim 6, characterized in that: The film-lifting gripper includes a rotating cylinder, a first clamping cylinder and a first clamping jaw. The first clamping jaw is provided on the first clamping jaw, and the first clamping jaw cylinder is used to drive the first clamping jaw to clamp or release; the first clamping jaw cylinder is installed on the rotating cylinder through a central axis, and the first clamping jaw cylinder and the first clamping jaw can rotate around the rotating cylinder.

8. The membrane cross-cutting and folding mechanism according to claim 1, characterized in that: The coarse mesh pressing unit includes a third servo motor, a third module, a third cylinder connected to the third module, a third clamp, a coarse mesh pressing cylinder, and a clamp clamping cylinder. The third servo motor drives the structure connected to the third module to move as a whole. The clamp clamping cylinder is installed on the third clamp. The clamp clamping cylinder and the third clamp move synchronously with the third cylinder. The third cylinder is extended to grab the coarse mesh, and the clamp clamping cylinder is extended to clamp the coarse mesh. The third servo motor drives the third cylinder to lift the coarse mesh to a suitable position. The coarse mesh pressing cylinder is extended to press the coarse mesh and the diaphragm.

9. A film cross-cutting and folding method, implemented using the film cross-cutting and folding mechanism according to any one of claims 1 to 8, characterized in that: The following steps are involved: pulling the continuous film sheet to a suitable length, cutting the continuous film sheet into individual film sheets, and pulling the film sheets to a folding platform; Pressing the coarse mesh and the membrane together, pulling the coarse mesh and the membrane to move and locate the folding point, grasping the end of the membrane and lifting it to the highest position and moving it in the opposite direction synchronously with the movement of the membrane and the coarse mesh, so that the membrane is folded around the folding center axis; The diaphragm and the coarse mesh are pulled to continue to move, and the end of the diaphragm gradually drops with the movement of the diaphragm and the coarse mesh, and the folding is completed by releasing the end of the diaphragm when it drops to zero position.

10. The film cross-cutting and folding method according to claim 9, wherein the continuous film is cut into individual films, characterized in that: Drive the cutting cylinder to cut the continuous diaphragm and heat press the cut part to prevent cracking.

11. The film cross-cutting and folding method according to claim 9, wherein the coarse mesh and the film are pressed together, characterized in that: The coarse mesh is placed and grasped at a low position, the coarse mesh is clamped and lifted to a suitable height, and the coarse mesh pressing cylinder is driven to press the coarse mesh and the diaphragm until they are in contact.

12. The film cross-cutting and folding method according to claim 9, wherein the film and the coarse mesh move in opposite directions synchronously with each other, characterized in that: The film lifting unit grasps the end of the diaphragm and moves at a constant speed in the X and Y directions at the same time, and the film lifting gripper rotates around the rotating cylinder.

13. The film cross-cutting and folding method according to claim 9, characterized in that: The folding point is the midpoint of the membrane.

14. The film cross-cutting and folding method according to claim 9, wherein the angle between the two sides of the folding center axis is α, where 0≤α≤180°, characterized in that: When α>90°, the end of the diaphragm is in an ascending state; when α=90°, the end of the diaphragm rises to the highest position; when α<90°, the end of the diaphragm is in a descending state; when α=0°, the diaphragm completes one folding.

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