A pleating device and filter material manufacturing equipment

Abstract

The application relates to a pleating device and filter material manufacturing equipment, and belongs to the technical field of filter material manufacturing devices.The application comprises a group of forming rollers arranged adjacently, the outer circumferential surfaces of the forming rollers are each provided with protrusions and / or grooves, the protrusions of one forming roller are engaged with the grooves of another forming roller, at least one heating piece is arranged at a position corresponding to the protrusions and the grooves inside the forming roller, at least one cooling piece is arranged at a position adjacent to the heating piece inside the forming roller, a motion control assembly is used for controlling the rolling of the forming roller, a heating control assembly is used for controlling the temperature of the heating piece, and a cooling control assembly is used for controlling the temperature of the cooling piece.The application simultaneously arranges the heating piece and the cooling piece on the forming roller, the heating piece is used for heating the filter material while the filter material is pleated, the preheating process is saved, the efficiency is improved, and the cooling piece can also prevent the filter material from being excessively damaged in the heating process.

Description

Technical Field

[0001] This invention relates to the field of filter material manufacturing technology, and specifically to a pleating device and filter material manufacturing equipment. Background Technology

[0002] The function of an automotive air filter is to remove particulate impurities from the air. It provides clean air to the cylinders to meet fuel requirements, reduces wear on valves (seats), cylinders, pistons (rings), and cylinder liners, and extends engine life. The performance of an air filter mainly depends on the performance of its filter element. Current filter elements are made by folding and applying adhesive to filter media, cutting and shaping it into the required cylindrical or flat form, and then sealing its edges with hot melt adhesive.

[0003] In the industry, filter cartridge folding is generally accomplished using reciprocating folding machines and roller folding machines. Reciprocating folding machines are increasingly being replaced by roller folding machines due to their particularly low efficiency. Compared to reciprocating folding machines, roller folding machines offer 3-5 times higher efficiency. A schematic diagram of a typical roller folding machine process is shown below. Figure 1 As shown, the process can be basically divided into the following steps: (1) Paper feeding: Install the filter material on the feeding roller; (2) Cutting: Trim the edge of the filter material to make the filter material the same width as the finished product; (3) Humidification: Humidify the surface of the filter material to increase its flexibility; (4) Preheating: Heat the filter material to increase its flexibility; (5) Printing: Mark the filter material to control the subsequent gluing and cutting; (6) Folding: Fold the filter material into a continuous W shape; (7) Folding back: Fold the folded filter material back and tidy it up; (8) Gluing: Apply hot melt adhesive between the folds of the filter material; (9) Curing: Cool and cure the hot melt adhesive; (10) Cutting: Cut according to the number of folds required for flat plate filters and cylindrical filters.

[0004] Current manufacturing processes are suitable for the most common air filter elements on the market, which use wood pulp fiber as the material. However, wood pulp fiber is prone to absorbing water and swelling. In the rainy season or in humid and hot regions, the water absorption of wood pulp fiber increases the filtration resistance of the air filter, leading to a decrease in engine intake air volume and consequently increasing engine fuel consumption. With technological advancements and product iterations, resin fiber is gradually replacing wood pulp fiber as the raw material for air filter elements. Although resin fiber has a low water absorption rate and its intake resistance is unaffected in humid environments, its low stiffness and the following disadvantages exist when using traditional molding processes:

[0005] 1. Reciprocating folding method is particularly inefficient for resin fibers, and the fibers tend to spring back after folding, resulting in high labor costs; 2. Roller folding method is less efficient for resin fibers than for wood pulp fibers, and the production cycle is slower; 3. Humidification process is not suitable for resin fibers; 4. Preheating process has high energy consumption; 5. Due to large-area preheating, the porosity of the filter material is reduced, affecting key performance indicators such as dust holding capacity. Summary of the Invention

[0006] This application provides a pleating device and filter media manufacturing equipment, which can avoid the technical problems of low pleating efficiency, high energy consumption, and significant damage to the filtration performance of the filter media itself caused by existing pleating devices.

[0007] In a first aspect, embodiments of this application provide a pleating device, the pleating device comprising:

[0008] A set of adjacent forming rollers each has a protrusion and / or a groove on its outer circumference; the protrusion of one forming roller and the groove of another forming roller engage with each other.

[0009] At least one heating element is disposed inside the forming roller at a position corresponding to the protrusion and the groove;

[0010] At least one cooling element is disposed inside the forming roller near the heating element;

[0011] A motion control component for controlling the rotation of the forming roller;

[0012] A heating control assembly for controlling the temperature of the heating element;

[0013] A cooling control assembly for controlling the temperature of the cooling element.

[0014] In conjunction with the first aspect, in one embodiment, the protrusions and grooves are triangular, trapezoidal, or arc-shaped.

[0015] In conjunction with the first aspect, in one embodiment, all the protrusions on the same forming roller are parallel to each other;

[0016] All the grooves on the same forming roller are parallel to each other.

[0017] In conjunction with the first aspect, in one embodiment, at least one cooling element is provided on one or both sides of the heating element.

[0018] In conjunction with the first aspect, in one embodiment, the heating element is a heating channel disposed inside the forming roller and a heating wire located in the heating channel;

[0019] The cooling component consists of a cooling channel located inside the forming drum and a cooling medium located within the cooling channel.

[0020] In conjunction with the first aspect, in one embodiment, the heating channel and the cooling channel correspond to a heating opening and a cooling opening, respectively, on the forming roller;

[0021] The heating control component controls the heating temperature of the heating element through the heating opening;

[0022] The cooling control assembly controls the cooling temperature of the cooling component through the cooling opening.

[0023] In conjunction with the first aspect, in one embodiment, one end of the forming roller is provided with a connecting portion, on which the heating opening and the cooling opening are provided.

[0024] In conjunction with the first aspect, in one embodiment, the portion of the heating wire located at the connection portion is wrapped with an insulating layer, and the insulating layer has a reserved opening at the position corresponding to the heating opening, so that the heating wire can contact the heating control component.

[0025] In conjunction with the first aspect, in one embodiment, the cooling control assembly includes at least one seal disposed around the connection portion, and a connector on the seal communicating with the cooling channel for delivering a cooling medium into the cooling channel.

[0026] Secondly, embodiments of this application provide a filter material manufacturing apparatus, including the aforementioned pleating device.

[0027] The beneficial effects of the technical solutions provided in this application include:

[0028] Heating and cooling components are simultaneously installed on the forming roller. The heating component heats the filter material while it is being pleated, saving the preheating process and improving efficiency. Meanwhile, the cooling component prevents excessive damage to the filter material's filtration performance when it is heated. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the process flow of a conventional roller-type pleating machine;

[0031] Figure 2 This is a schematic diagram of the structure of an embodiment of the pleating device of the present invention;

[0032] Figure 3 This is a schematic diagram of the structure of an embodiment of the forming roller of the present invention;

[0033] Figure 4 This is a cross-sectional schematic diagram of an embodiment of the forming roller of the present invention;

[0034] Figure 5 for Figure 4Enlarged view of area A in the middle;

[0035] Figure 6 This is a schematic diagram of the process flow for the filter material manufacturing equipment of the present invention.

[0036] In the diagram: 1. Forming roller; 2. Protrusion; 3. Groove; 4. Heating element; 5. Cooling element; 6. Connecting part; 7. Insulation layer; 8. O-ring; 9. Sealing ring; 10. Joint; 11. Brush; 12. Bearing; 13. Heating channel; 14. Cooling channel; 15. Heating opening; 16. Cooling opening. Detailed Implementation

[0037] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0038] This application provides an airway management device that solves the technical problems of narrow applicability and poor stability and comfort during use of existing airway management devices.

[0039] Reference Figures 2 to 5 This invention provides a pleating device, which includes a set of adjacent forming rollers 1, each having a protrusion 2 and / or a groove 3 on its outer circumferential surface; the protrusion 2 of one forming roller 1 and the groove 3 of the other forming roller 1 engage with each other. At least one heating element 4 is disposed inside the forming roller 1 at a position corresponding to the protrusion 2 and the groove 3; at least one cooling element 5 is disposed inside the forming roller 1 near the heating element 4. The pleating device also includes an action control component for controlling the rolling of the forming roller 1; a heating control component for controlling the temperature of the heating element 4; and a cooling control component for controlling the temperature of the cooling element 5.

[0040] In this embodiment, considering the material characteristics of the resin fiber air filter, an improved pleating device is used, employing a hot-pleating integrated molding process. This means that the heating and pleating processes are completed in the same step, eliminating the need to preheat the filter material before pleating. Instead, the filter material is heated simultaneously with the pleating process. Furthermore, considering that large-area heating would reduce the porosity of the filter material and affect key performance indicators such as dust holding capacity, the areas that do not require pleating are cooled during the pleating process. This minimizes the heated areas, keeping them as close as possible to or near the areas where pleating is required.

[0041] In summary, heating element 4 and cooling element 5 are simultaneously provided on the forming roller 1. Heating element 4 is used to heat the filter material while pleating, saving the preheating process and improving efficiency. At the same time, cooling element 5 can be used to avoid excessive damage to the filter material's filtration performance when heating the filter material.

[0042] In a preferred embodiment, the protrusion 2 and the groove 3 are triangular, trapezoidal, or arc-shaped.

[0043] In this embodiment, when a set of opposite protrusions 2 and grooves 3 on two adjacent forming rollers 1 are both triangular, the protrusions 2 are embedded in the grooves 3, and the shapes of the protrusions 2 and grooves 3 match. If the triangle is an isosceles triangle or an equilateral triangle, the pleats pressed onto the filter material will be isosceles triangles or equilateral triangles. If the triangle is another irregular triangle, the pleats pressed onto the filter material will be other irregular triangles.

[0044] When a pair of opposite protrusions 2 and grooves 3 on two adjacent forming rollers 1 are both trapezoidal, the protrusions 2 are embedded in the grooves 3, and the shapes of the protrusions 2 and grooves 3 match. If the trapezoid is an isosceles trapezoid, the pleats pressed on the filter material will be isosceles trapezoids; if the trapezoid is another irregular trapezoid, the pleats pressed on the filter material will be other irregular trapezoids.

[0045] When the opposing set of protrusions 2 and grooves 3 on two adjacent forming rollers 1 are both arc-shaped, the protrusions 2 are embedded in the grooves 3, and the shapes of the protrusions 2 and grooves 3 match. The pleats pressed into the filter material are arc-shaped.

[0046] Besides triangles, trapezoids, or arcs, the shapes of protrusions 2 and grooves 3 can be adjusted according to other pleating requirements of the filter media. The heating element 4 inside the forming roller 1 is generally located below the protrusion 2 and / or below the groove 3. When the bottom of an adjacent set of protrusions 2 and grooves 3 is equipped with heating elements 4, the pleating efficiency of the filter media is higher when passing through two adjacent forming rollers 1. However, considering that if the heating temperature at the pleating point of the aluminum material corresponding to the protrusion 2 and groove 3 is too high, it will cause deformation of the material in other locations besides the pleating point due to the heat, the heating element 4 may be set only at the protrusion 2 or only at the groove 3, depending on the material characteristics of the filter media.

[0047] In a preferred embodiment, all the protrusions 2 on the same forming roller 1 are parallel to each other;

[0048] All the grooves 3 on the same forming roller 1 are parallel to each other.

[0049] In this embodiment, the protrusion 2 can be straight or other linear. However, the pleat shape of the filter material of a general air filter is a single shape. Therefore, regardless of whether the protrusion 2 is straight or other linear, adjacent protrusions 2 are parallel to each other. The shape of the corresponding groove 3 matches the shape of the protrusion 2, and the shapes of the heating element 4 and the cooling element 5 match the shape of the protrusion 2.

[0050] In addition, since the spacing between the pleats of the air filter material may be the same or different, the spacing between adjacent protrusions 2, adjacent grooves 3, and adjacent protrusions 2 and grooves 3 on the same forming roller 1 may also be the same or different. If the spacing is different, the heating efficiency of the heating element 4 under each protrusion 2 and groove 3 may be different, so as to ensure that when the filter material passes between adjacent forming rollers 1, the heating of the previous pleat by the heating element 4 of the previous protrusion 2 or groove 3 will affect the temperature of the forming part of the next pleat.

[0051] In terms of distance, for a certain type of filter material, the distance between the first and second pleats is L1, the distance between the second and third pleats is L2, and the distance between the third and fourth pleats is L3, where L1 = L3 and L1 is less than L2.

[0052] If the heating efficiency of the heating element 4 on the forming roller 1 of the pleating device corresponding to the first pleat, second pleat, third pleat, and fourth pleat is the same, then after the filter material passes through the first pleat and is heated at the first pleat, some heat is transferred from the first pleat to the second pleat. This heat may not be enough to change the performance of the filter material between the second and third pleats. However, when the filter material reaches the second pleat after traveling a distance L1, this heat, plus the heating temperature of the heating element 4 at the second pleat, will cause the degree of heating at the second pleat to be higher than that at the first pleat. Therefore, the forming shape and performance of the first and second pleats will be different.

[0053] When the filter material passes through the second pleat and is heated at the second pleat, some heat will also be transferred from the second pleat to the third pleat. This heat may not be enough to change the performance of the filter material between the second and third pleats. Since L2 is greater than L1, this heat will not be transferred to the third pleat. Therefore, the degree of heating at the third pleat is the same as the degree of heating at the first pleat. Thus, the first and third pleats have the same shape and performance.

[0054] Considering the above factors, the heating degree of each heating element 4 on the pleating device needs to be adjusted according to the spacing between the pleats on the filter material to be pleated, so as to ensure that the forming shape and performance of all pleats meet expectations.

[0055] In a preferred embodiment, at least one cooling element 5 is provided on one or both sides of the heating element 4.

[0056] In this embodiment, the cooling element 5 can prevent the heating element 4 from damaging the filter material performance at locations other than the pleated position.

[0057] If the distance between the current fold and the previous fold is L4, and the distance between the current fold and the next fold is L5, and L4 is less than L5, then when the heating power of all heating elements 4 is the same, that is, the heating power of each heating element 4 is not adjusted, but the cooling power of the cooling element 5 is adjusted to ensure that the forming shape and performance of all folds meet the expectations. Then, the number or power of the cooling element 5 near the previous fold and near the next fold of the current fold can be adjusted to ensure that the current fold is not affected by the heat transferred from the previous fold or the next fold during forming.

[0058] In a preferred embodiment, the heating element 4 is a heating channel disposed inside the forming roller 1 and a heating wire located in the heating channel;

[0059] The aforementioned cooling element 5 is a cooling channel disposed inside the forming roller 1 and a cooling medium located within the aforementioned cooling channel.

[0060] In this embodiment, the heating wire can be connected to the heating control component via an electrical connection. The electric heating method can improve the accuracy and efficiency of temperature adjustment, and the heating wire is also easy to replace.

[0061] Cooling component 5 uses a cooling medium, such as cooling gas or cooling liquid generated by the filter material manufacturing equipment in processes other than the pleating process, to cool the filter material and achieve energy-saving effect.

[0062] For ease of wiring and layout, the heating element can be partially exposed on the exterior of the forming roller body and connecting parts, as shown in the reference. Figure 2 As shown.

[0063] In a preferred embodiment, the heating channel and the cooling channel correspond to a heating opening and a cooling opening, respectively, on the forming roller 1;

[0064] The heating control assembly controls the heating temperature of the heating element 4 through the heating opening.

[0065] The cooling control assembly controls the cooling temperature of the cooling component 5 through the cooling opening.

[0066] In this embodiment, by providing corresponding openings on the forming roller 1, the heating wire can make contact with the heating control component and conduct electricity while the forming roller 1 is rotating, and the cooling medium can circulate in the cooling channel.

[0067] In a preferred embodiment, one end of the forming roller 1 is provided with a connecting portion 6, and the connecting portion 6 is provided with the heating opening and the cooling opening.

[0068] In this embodiment, the connecting part 6 can be a protrusion of the main body of the forming roller 1 or a recess of the main body of the forming roller 1, mainly to facilitate connection with the motion control component, heating control component and cooling control component.

[0069] In a preferred embodiment, the portion of the heating wire located at the connection portion 6 is covered with an insulating layer 7, and the insulating layer 7 has a reserved opening at the position corresponding to the heating opening, so that the heating wire can contact the heating control component.

[0070] In this embodiment, the brush 11 in the heating control assembly is fixed in position. The heating wire located in the heating channel of the connecting part 6 is named the conductive wire. One end of the conductive wire is connected to the heating wire in the heating channel of the forming cylinder body, and the other end is configured as a ring around the connecting part 6 or connected to a conductive ring. The conductive ring is coated with an insulating layer 7 on three sides to isolate the conductive ring from the connecting part 6. The exposed side of the conductive ring is in contact with the brush 11. During pleating, when the forming cylinder rotates, it drives the conductive ring to rotate. At this time, the brush 11 is stationary and does not rotate. The heating control assembly thus realizes the electrical transmission between the 360° unrestricted rotating part and the stationary part.

[0071] In a preferred embodiment, the cooling control assembly includes at least one seal surrounding the connection portion 6, and a connector 10 communicating with the cooling channel is provided on the seal. The connector 10 is used to deliver a cooling medium into the cooling channel.

[0072] In this embodiment, the sealing element includes an O-ring 8 and a sealing ring 9. Multiple sealing rings 9 are arranged side by side and are all fitted onto the connecting part 6. Sealant is applied at the contact point of adjacent sealing rings 9. The aforementioned O-ring 8 is also provided between adjacent sealing rings 9. When the forming roller 1 rotates, the connecting part 6 rotates, while the O-ring 8, sealing ring 9 and connector 10 remain stationary. The cooling medium output from the connector 10 can enter the connecting part 6 through the cooling opening on the outer periphery of the connecting part 6, and then enter the main body of the forming roller 1 through the connecting part 6.

[0073] Setting multiple sealing rings 9 is to avoid scratching the O-ring 8 located inside the sealing unit when the sealing unit is a whole and is fitted onto the connecting part 6. In actual installation, one sealing ring 9, one O-ring 8, one sealing ring 9, one O-ring 8, and one sealing ring 9 are installed in sequence to form a sealing unit.

[0074] In a preferred embodiment, the pleating device further includes multiple temperature detection sensors disposed within the forming roller 1, thereby collecting and controlling the temperature of each heating element 4, and a temperature alarm function can also be added on this basis.

[0075] In one specific embodiment, the relationship between water absorption rate and folding rate of wood pulp fiber and resin fiber materials were tested respectively. The water absorption rate (by weight) of wood pulp fiber was 288%, the water absorption rate (by weight) of wood pulp fiber was 0.7%, the processing rate of wood pulp fiber was 100 m / min, and the processing rate of wood pulp fiber was 7-40 m / min.

[0076] Compared with existing pleating devices, the pleating device of the present invention requires the filter material to be preheated to about 200°C in advance. The pleating device of the present invention does not require preheating and the heating temperature at the forming roller 1 is about 110-130°C, which significantly reduces energy consumption and shortens the production line length from about 53m to about 41m.

[0077] The core component of the integrated hot-bending molding process is the forming roller 1. The outer wall of the roller is evenly distributed with grooves 3 and protrusions 2. The distance between adjacent grooves 3 and protrusions 2 is equal to the folding height of the filter element. The folding process is achieved by the engagement of the grooves 3 and protrusions 2 of a pair of forming rollers 1. The forming roller 1 has heating wire mounting holes, i.e., heating channels, and houses the heating wire. The heating wire fits perfectly into the mounting holes, ensuring uniform temperature during heating and extending the service life of the heating wire. Cooling holes, i.e., cooling channels, are located on both sides of the heating wire. The cooling medium can be compressed air or coolant. This allows for both hot and cold working surfaces on the same forming roller 1, which is beneficial for the bending and forming of resin fibers without reducing the porosity of the resin fiber material.

[0078] Since the forming roller 1 rotates continuously at 360° without restriction during operation, water, electricity and gas need to be connected to the rotating parts. In order to avoid the problem of pipes and lines getting tangled, corresponding lines and pipes for conductive, air-guiding and water-guiding rings are arranged on the two end faces of the forming roller 1.

[0079] The conductive brush 11 can be made of carbon brush, copper brush, silver / graphite / molybdenum disulfide brush block, etc.

[0080] The transmission of compressed air or coolant from the rotating position to the fixed position is achieved through the sealing ring 9 and the connector 10. The sealing ring 9 and the connector 10 are sealed by the O-ring 8, which is made of EPDM rubber, silicone rubber, or fluororubber.

[0081] The forming roller 1 is supported by bearing 12, and the forming roller 1 as a whole can rotate.

[0082] Reference Figure 6 The present invention also provides a filter material manufacturing apparatus, which includes the pleating device.

[0083] In this embodiment, the filter material manufacturing equipment further includes a paper feeding device, a slitting device, a printing device, a folding device, an adhesive application device, a curing device, and a cutting device.

[0084] In one specific embodiment, taking into account the material properties of the resin fiber air filter, a hot-bending integrated molding process is adopted, that is, the heating and folding processes are carried out in the same step, as shown in the process flow. Figure 6 As shown, it can be basically divided into the following steps:

[0085] Paper feeding: Install the filter material onto the feeding rollers;

[0086] Slitting: Trim the edges of the filter media to make the filter element the same width as the finished product;

[0087] Printing: Marking the filter material to control subsequent gluing and cutting;

[0088] Heat pleating: The filter material is heat-pressed and pleated into a continuous W shape using a pleating device;

[0089] Folding: Folding and tidying up the folded filter material;

[0090] Apply adhesive: Apply hot melt adhesive between the folds of the filter element;

[0091] Curing: Cooling and curing the hot melt adhesive;

[0092] Cutting: Cut according to the required number of folds for flat plate filters and cylindrical filters.

[0093] In this embodiment, considering the material characteristics of the resin fiber air filter, an improved pleating device is used, employing a hot-pleating integrated molding process. This means that the heating and pleating processes are completed in the same step, eliminating the need to preheat the filter material before pleating. Instead, the filter material is heated simultaneously with the pleating process. Furthermore, considering that large-area heating would reduce the porosity of the filter material and affect key performance indicators such as dust holding capacity, the areas that do not require pleating are cooled during the pleating process. This minimizes the heated areas, keeping them as close as possible to or near the areas where pleating is required.

[0094] In summary, heating element 4 and cooling element 5 are simultaneously provided on the forming roller 1. Heating element 4 is used to heat the filter material while pleating, saving the preheating process and improving efficiency. At the same time, cooling element 5 can be used to avoid excessive damage to the filter material's filtration performance when heating the filter material.

[0095] In a preferred embodiment, all the protrusions 2 on the same forming roller 1 are parallel to each other;

[0096] All the grooves 3 on the same forming roller 1 are parallel to each other.

[0097] In this embodiment, the protrusion 2 can be straight or other linear. However, the pleat shape of the filter material of a general air filter is a single shape. Therefore, regardless of whether the protrusion 2 is straight or other linear, adjacent protrusions 2 are parallel to each other. The shape of the corresponding groove 3 matches the shape of the protrusion 2, and the shapes of the heating element 4 and the cooling element 5 match the shape of the protrusion 2.

[0098] In addition, since the spacing between the pleats of the air filter material may be the same or different, the spacing between adjacent protrusions 2, adjacent grooves 3, and adjacent protrusions 2 and grooves 3 on the same forming roller 1 may also be the same or different. If the spacing is different, the heating efficiency of the heating element 4 under each protrusion 2 and groove 3 may be different, so as to ensure that when the filter material passes between adjacent forming rollers 1, the heating of the previous pleat by the heating element 4 of the previous protrusion 2 or groove 3 will affect the temperature of the forming part of the next pleat.

[0099] In terms of distance, for a certain type of filter material, the distance between the first and second pleats is L1, the distance between the second and third pleats is L2, and the distance between the third and fourth pleats is L3, where L1 = L3 and L1 is less than L2.

[0100] If the heating efficiency of the heating element 4 on the forming roller 1 of the pleating device corresponding to the first pleat, second pleat, third pleat, and fourth pleat is the same, then after the filter material passes through the first pleat and is heated at the first pleat, some heat is transferred from the first pleat to the second pleat. This heat may not be enough to change the performance of the filter material between the second and third pleats. However, when the filter material reaches the second pleat after traveling a distance L1, this heat, plus the heating temperature of the heating element 4 at the second pleat, will cause the degree of heating at the second pleat to be higher than that at the first pleat. Therefore, the forming shape and performance of the first and second pleats will be different.

[0101] When the filter material passes through the second pleat and is heated at the second pleat, some heat will also be transferred from the second pleat to the third pleat. This heat may not be enough to change the performance of the filter material between the second and third pleats. Since L2 is greater than L1, this heat will not be transferred to the third pleat. Therefore, the degree of heating at the third pleat is the same as the degree of heating at the first pleat. Thus, the first and third pleats have the same shape and performance.

[0102] Considering the above factors, the heating degree of each heating element 4 on the pleating device needs to be adjusted according to the spacing between the pleats on the filter material to be pleated, so as to ensure that the forming shape and performance of all pleats meet expectations.

[0103] In a preferred embodiment, at least one cooling element 5 is provided on one or both sides of the heating element 4.

[0104] In this embodiment, the cooling element 5 can prevent the heating element 4 from damaging the filter material performance at locations other than the pleated position.

[0105] If the distance between the current fold and the previous fold is L4, and the distance between the current fold and the next fold is L5, and L4 is less than L5, then when the heating power of all heating elements 4 is the same, that is, the heating power of each heating element 4 is not adjusted, but the cooling power of the cooling element 5 is adjusted to ensure that the forming shape and performance of all folds meet the expectations. Then, the number or power of the cooling element 5 near the previous fold and near the next fold of the current fold can be adjusted to ensure that the current fold is not affected by the heat transferred from the previous fold or the next fold during forming.

[0106] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0107] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0108] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A tuck device characterized by, The pleating device includes: A set of adjacent forming rollers (1) are provided with protrusions (2) and / or grooves (3) on their outer peripheral surfaces; the protrusions (2) of one forming roller (1) and the grooves (3) of another forming roller (1) mesh with each other; At least one heating element (4) is disposed inside the forming roller (1) at a position corresponding to the protrusion (2) and the groove (3); At least one cooling element (5) is disposed inside the forming roller (1) near the heating element (4); A motion control component for controlling the rolling of the forming roller (1); A heating control component is used to control the temperature of the heating element (4) and adjust the heating degree of each heating element (4) on the pleating device according to the interval distance between the pleats on the filter material to be pleated. A cooling control component is used to control the temperature of the cooling element (5) and adjust the cooling power of the cooling element (5).

2. The tuck device of claim 1 wherein, The protrusion (2) and groove (3) are triangular, trapezoidal or arc-shaped.

3. The tuck device of claim 1 wherein, All the protrusions (2) on the same forming roller (1) are parallel to each other; All the grooves (3) on the same forming roller (1) are parallel to each other.

4. The pleat pack of claim 1 wherein, At least one cooling element (5) is provided on one or both sides of the heating element (4).

5. The tuck device of claim 1 wherein, The heating element (4) is a heating channel disposed inside the forming roller (1) and a heating wire located in the heating channel; The cooling component (5) is a cooling channel disposed inside the forming roller (1) and a cooling medium located in the cooling channel.

6. The tuck device of claim 5 wherein, The heating channel and the cooling channel correspond to a heating opening and a cooling opening respectively on the forming roller (1); The heating control assembly controls the heating temperature of the heating element (4) through the heating opening; The cooling control assembly controls the cooling temperature of the cooling component (5) through the cooling opening.

7. The tuck device of claim 6 wherein, One end of the forming roller (1) is provided with a connecting part (6), and the connecting part (6) is provided with the heating opening and the cooling opening.

8. The pleat pack of claim 7 wherein, The portion of the heating wire located at the connection part (6) is covered with an insulating layer (7), and the insulating layer (7) has a reserved opening at the position corresponding to the heating opening so that the heating wire can contact the heating control component.

9. The pleat pack of claim 7 wherein, The cooling control assembly includes at least one seal surrounding the connection portion (6), and a connector on the seal communicating with the cooling channel for supplying a cooling medium into the cooling channel.

10. A filter material manufacturing apparatus characterized by comprising: Includes the pleating device as described in any one of claims 1-9.

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