Positioning and material guiding tool for folding filter element and filter element folding machine
By using a multi-layered guide groove and adjustment components in the positioning and guiding tooling, the problem of the membrane belt shifting during the filter element folding process was solved, achieving accurate positioning of the filter layer, the flow guiding layer and the membrane belt, thus improving the welding quality and the overall performance of the filter element.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-20
- Publication Date
- 2026-03-24
AI Technical Summary
In pleated filter cartridges, the narrow width of the membrane belt and the difficulty in accurate manual alignment cause the filter layer, flow guide layer and membrane belt to shift in position before hot-melt welding, affecting the welding quality.
Design a positioning and guiding tooling for filter cartridge folding, comprising multi-layer guide grooves and adjustment components to ensure accurate positioning and alignment of the filter layer, guide layer and membrane belt, and adapt to filter cartridges of different sizes and lengths through sliding adjustment of the guide grooves and limiting plates.
This improved the alignment accuracy of the filter layer, flow guide layer, and membrane tape, ensuring welding quality and enhancing the production quality of the filter element.
Smart Images
Figure CN224028366U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of filter element processing technology, specifically to a positioning and guiding tooling for filter element folding and a filter element folding machine. Background Technology
[0002] Pleated filter cartridges offer advantages such as large filtration area, high dirt-holding capacity, long service life, and high filtration efficiency, meeting the filtration requirements of industries such as food and beverage processing, chemicals, and pharmaceuticals. They are essential components in fluid handling processes. A typical pleated filter cartridge includes a coaxially arranged, porous central rod, a housing, and upper and lower end caps fixed to the housing and both ends of the central rod. A pleated filter medium, distributed around the central rod, is housed within the cavity between the central rod and the housing. This pleated filter medium is typically sealed to the upper and lower end caps via heat fusion welding.
[0003] Pleated filter media typically consist of a filter layer and flow guide layers located upstream and downstream of the filter layer. Depending on the specific requirements, the filter layer and flow guide layers may be made of different materials. For example, in a polytetrafluoroethylene (PTFE) pleated filter cartridge, the flow guide layer is usually made of PP, while the filter layer is made of PTFE. The melting point of the PTFE filter layer is typically above 300℃, while the melting point of the PP flow guide layer is typically between 130℃ and 180℃. Therefore, the melting point of the flow guide layer is significantly lower than that of the filter layer. During hot-melt welding, the temperature needs to reach above 300℃ for the PTFE filter layer to begin melting. By this time, the PP flow guide layer has already melted. Since the molten liquid has a certain degree of fluidity, if the PP flow guide layer melts too early, some of the molten liquid may be lost due to flow, thus compromising the integrity of the welded structure. This results in the flow guide layer failing to form a reliable connection with the end cap, leading to insufficient connection strength.
[0004] To address the aforementioned issues, one method involves placing two thin-film strips between each adjacent filter layer and flow guide layer of the pleated filter media. These thin-film strips are made of the same material as the flow guide layer, which has a lower melting point. Figure 1 As shown, the membrane strip 300 is located at both ends. The filter layer 100, the flow guiding layer 200, and the membrane strip 300 can be folded together into pleats and heat-fused together with the end caps. During heat-fusion welding, the membrane strip can increase the amount of low-melting-point material melted, thereby ensuring the integrity of the weld and improving the weld quality.
[0005] A filter cartridge folding machine is a device used to fold filter membranes into pleats. For the folding process of conventional folded filter cartridges, a certain degree of left and right offset is allowed between the filter layer membrane and the flow guiding layer membrane. This is because the ends can be flushed by cutting the ends first, and then hot-melt welding can be performed. Therefore, conventional folded filter cartridges are only fed by guide rollers, and only need to be roughly aligned manually before loading.
[0006] However, if a folded filter medium with a membrane strip added at both ends is used as described above, some problems will arise. This is because the width of the membrane strip is usually small, and the position of each layer is easily offset by manual alignment. If the size is too large during subsequent cutting, the membrane strip may have too little allowance or be completely cut off. If the size is too small during subsequent cutting, it is impossible to ensure that the ends of each layer are completely flush, thus affecting the welding quality. Utility Model Content
[0007] In order to overcome the shortcomings of the prior art, this utility model provides a positioning and guiding tooling for filter element folding.
[0008] The technical solution adopted by this utility model is as follows: a positioning and guiding tooling for filter element folding, comprising a tooling body, wherein multiple layers of guiding grooves are formed on the tooling body, and the guiding grooves are respectively:
[0009] The first feed channel is used for positioning and guiding the filter membrane;
[0010] The second guide channel, located above and / or below the first guide channel, is used for positioning and guiding the flow layer film.
[0011] The third guide channel is located between the adjacent first guide channel and the second guide channel, and the third guide channel includes positioning guide parts located at the left and right ends respectively, the positioning guide parts being used for positioning and guiding the film strip;
[0012] The ends of the first guide trough, the second guide trough, and the third guide trough are kept aligned.
[0013] Before the filter element is folded, the filter layer membrane is passed through the first guide groove, the flow guiding layer membrane through the second guide groove, and the membrane strip through the positioning guide part of the third guide groove. This effectively separates the filter layer membrane, flow guiding layer membrane, and membrane strip into upper and lower layers, ensuring stable material feeding. At the same time, the positioning guide parts of the first, second, and third guide grooves can accurately position the filter layer membrane, flow guiding layer membrane, and membrane strip to ensure that they are relatively accurately aligned, avoiding excessive offset between the layers, ensuring the effect of subsequent cutting and welding, and improving product quality.
[0014] The tooling body also has a first adjustment component that can adjust the length of the positioning guide section. By adjusting the first adjustment component, the positioning guide section can be adapted to film strips of different widths.
[0015] The tooling body also has a second adjustment component that can simultaneously adjust the length of the multi-layer guide trough. Through the adjustment of the first adjustment component, the guide trough can be adapted to pleated filter elements of different lengths.
[0016] The specific structure of the tooling body includes:
[0017] Two fixed side plates;
[0018] At least one set of guide rods, each end of which is fixedly connected to two fixed side plates. Each set of guide rods includes several guide rods arranged at intervals along the longitudinal direction. The gaps between the guide rods constitute the material guide trough.
[0019] Two first limiting plates are slidably mounted on the guide rod assembly, and the first limiting plates pass through all the guide grooves from top to bottom. By adjusting the position of the first limiting plates, they can be used to simultaneously limit the end positions of all the guide grooves. The two first limiting plates constitute the second adjustment assembly described above.
[0020] Multiple second limiting plates are slidably disposed on two guide rods that constitute the third guide groove. The gap between the second limiting plate and the first limiting plate constitutes the positioning guide part. By adjusting the position of the second limiting plate, it can be used to limit the end position of the positioning guide part. The second limiting plate constitutes the first adjustment component mentioned above.
[0021] The guide rod assembly consists of two sets, which are respectively located at the front and rear ends near the fixed side plate.
[0022] Both the first limiting plate and the second limiting plate are provided with threaded holes, and each threaded hole corresponds to at least one of the guide rods. A locking bolt is provided on the threaded hole, which can conveniently and reliably fix the position of the first limiting plate and the second limiting plate.
[0023] A fixed base plate is also connected between the two fixed side plates. The fixed base plate is provided with a positioning indicator structure. The fixed plate further enhances the overall structure. At the same time, the positioning indicator structure makes it easier to accurately position the first limiting plate and the second limiting plate.
[0024] The tooling structure described above is simple, easy to manufacture and process, and convenient to adjust.
[0025] This utility model also provides a filter element folding machine, which includes the positioning and guiding tooling described above.
[0026] The beneficial effects of this utility model are as follows: By adopting the above solution and setting multiple upper and lower layered material guide grooves, not only can the filter layer film, the flow guide film, and the film belt be effectively layered to ensure stable material guidance, but the left and right positions of the filter layer film, the flow guide film, and the film belt can also be accurately positioned, thereby ensuring that the filter layer film, the flow guide film, and the film belt can maintain relatively accurate alignment, avoiding excessive offset between the layers of materials, ensuring the effect of subsequent cutting and welding, and improving product quality. Attached Figure Description
[0027] Figure 1 This is a schematic diagram of a folded filter medium with a thin film strip.
[0028] Figure 2 This is a front structural diagram of a positioning and guiding tool for filter element folding according to an embodiment of the present invention.
[0029] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.
[0030] Figure 4 This is a schematic diagram of a positioning and guiding tool for filter element folding according to an embodiment of the present invention. Detailed Implementation
[0031] The embodiments of this utility model will be further described below with reference to the accompanying drawings.
[0032] like Figures 2-4 As shown, a positioning and guiding tooling for filter element folding includes a tooling body 1, which includes a fixed side plate 11, a guide rod assembly, a first limiting plate 13, and a second limiting plate 14.
[0033] Two fixed side plates 11 are provided and are located on the left and right sides, which are used for overall support and fixation of the tooling body 1.
[0034] The guide rod assembly is connected to two fixed side plates 11 at both ends. There are two sets of guide rods, each positioned near the front and rear ends of the fixed side plates 11. Each set includes several guide rods 12 spaced apart along the longitudinal direction. The gaps between adjacent guide rods 12 form material guide channels. Therefore, the spaced guide rods can form multiple vertically spaced material guide channels. Each material guide channel can be used for the passage of the filter layer film, the flow guiding layer film, and the film belt, thereby effectively separating the filter layer film, the flow guiding layer film, and the film belt into upper and lower layers during the material guiding process, ensuring stable material guiding.
[0035] In this embodiment, the guide rod assembly includes six guide rods 12, which are arranged at intervals from top to bottom to form a total of five material guiding channels. Among these five material guiding channels, the third material guiding channel from the top is defined as the first material guiding channel 2, which is used for guiding the filter layer membrane; the first and fifth material guiding channels from the top are defined as the second material guiding channel 3, which is used for guiding the flow layer membrane; and the second and fourth material guiding channels from the top are defined as the third material guiding channel 4, which is used for guiding the membrane tape.
[0036] Of course, the guide rod group is not limited to 2 groups, and the number of guide rods 12 in each group is not limited to 6. The number of guide rods 12 needs to be designed according to the actual number of layers of the pleated filter media. Usually, the first guide trough and the second guide trough are arranged alternately, while the third guide trough is located between each adjacent first guide trough and second guide trough.
[0037] Two first limiting plates 13 are provided and slidably disposed on the guide rod assembly. The first limiting plates 13 extend through all the guide grooves from top to bottom. That is to say, the first limiting plates 13 are actually the end positions of all the guide grooves. Therefore, the first limiting plates 13 can be used to simultaneously limit the ends of the filter layer film, the flow guiding film, and the film belt. Thus, during the feeding and guiding process, the ends of the filter layer film, the flow guiding film, and the film belt can be easily kept relatively accurately aligned by the first limiting plates 13.
[0038] The first limiting plate 13 can be slidably set along the guide rod, which allows the first limiting plate 13 to slide and adjust its position along the guide rod according to the actual width of the filter layer film and the flow guiding layer film, thereby adapting to filter layer films and flow guiding layer films of different sizes and specifications, and meeting the production requirements of folded filter elements of different lengths such as 5 inches and 10 inches.
[0039] In addition, the first limiting plate 13 is also provided with a threaded hole, which corresponds to at least one of the guide rods. A locking bolt is provided on the threaded hole. When the position of the first limiting plate 13 is adjusted to the correct position, the locking bolt can easily lock the first limiting plate 13 to prevent it from sliding. The structure is simple and the operation is convenient.
[0040] The second limiting plate 14 is disposed on the guide rod that constitutes the third guide groove. The second limiting plate 14 and the first limiting plate 13 form a positioning guide part 41 at both ends of the third guide groove. The length of the positioning guide part 41 is adapted to the film belt and can be used for positioning and guiding the film belt, further ensuring that the film belt will not deviate during the feeding and guiding process, and ensuring that the film belt and the filter layer film and the flow guiding layer film always maintain relatively accurate alignment.
[0041] The second limiting plate 14 can also slide along the guide rod, which allows the first limiting plate 13 to slide and adjust its position along the guide rod according to the actual width of the film strip, thereby adapting to film strips of different sizes and specifications.
[0042] In addition, the second limiting plate 14 is also provided with threaded holes, and locking bolts are provided on the threaded holes. When the position of the second limiting plate 14 is adjusted to the correct position, it can also be locked and fixed by locking bolts.
[0043] A fixed base plate 15 is also connected between the two fixed side plates 11. The fixed base plate 15 is provided with a positioning indicator structure (not shown in the figure). The positioning indicator structure can be a scale formed on the fixed base plate or a position indicator arrow formed on the fixed base plate. It is used to position the first limiting plate 13 and the second limiting plate 14 at their commonly used positions. For different specifications of flow guide layer, filter layer and film belt, the first limiting plate 13 and the second limiting plate 14 can be quickly adjusted into position according to the positioning indicator structure, thereby improving work efficiency.
[0044] The aforementioned positioning and guiding fixture is typically used in conjunction with a filter cartridge folding machine. The main body of the filter cartridge folding machine utilizes existing conventional technology, while the fixed side plate or fixed base plate of the positioning and guiding fixture is fixedly installed at the front end of the filter cartridge folding machine using bolts, tape, or other methods. Figure 1 The diagram shows a folded pre-feeder for a folded filter medium with a membrane belt.
[0045] During the folding and guiding process, the filter layer film is passed through the first guide groove, the flow guiding layer film through the second guide groove, and the film strip through the positioning guide part of the third guide groove. This effectively separates the filter layer film, flow guiding layer film, and film strip into upper and lower layers, ensuring stable material guidance. At the same time, the positioning guide parts of the first, second, and third guide grooves can accurately position the left and right sides of the filter layer film, flow guiding layer film, and film strip, ensuring that the filter layer film, flow guiding layer film, and film strip maintain relatively accurate alignment. This avoids excessive offset between the layers of material, ensuring the effect of subsequent cutting and welding, and improving product quality.
[0046] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," 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 utility model and simplifying the description. They 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 on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0047] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0048] Please note to all technical personnel: Although this utility model has been described according to the specific embodiments above, the inventive concept of this utility model is not limited to this utility model. Any modification that utilizes the concept of this utility model will be included within the scope of protection of this patent right.
Claims
1. A positioning and guiding tooling for filter element folding, comprising a tooling body (1), characterized in that, The tooling body (1) has multiple layers of guide grooves, the guide grooves being: The first feed groove (2) is used for positioning and feeding the filter membrane; The second guide groove (3) is located above and / or below the first guide groove (2) and is used for positioning and guiding the flow layer film. The third guide groove (4) is located between the adjacent first guide groove (2) and second guide groove (3), and the third guide groove (4) includes positioning guide parts (41) located at the left and right ends respectively. The positioning guide parts (41) are used for positioning and guiding the film strip. The ends of the first guide groove (2), the second guide groove (3), and the third guide groove (4) are kept aligned.
2. The positioning and guiding tooling for filter element folding according to claim 1, characterized in that, The tooling body (1) has a first adjustment component that can adjust the length of the positioning guide part (41).
3. The positioning and guiding tooling for filter element folding according to claim 1, characterized in that, The tooling body (1) has a second adjustment component that can simultaneously adjust the length of the multi-layer guide trough.
4. The positioning and guiding tooling for filter element folding according to claim 1, characterized in that, The tooling body (1) includes: Two fixed side plates (11); At least one set of guide rods, each end of which is fixedly connected to two fixed side plates (11). Each set of guide rods includes several guide rods (12) arranged at intervals along the longitudinal direction. The gaps between the guide rods (12) constitute the material guide trough. Two first limiting plates (13) are slidably disposed on the guide rod assembly, and the first limiting plates (13) extend through all the guide grooves from top to bottom, which can be used to simultaneously limit the end positions of all the guide grooves; Multiple second limiting plates (14) are slidably disposed on two guide rods constituting the third guide groove (4). The gap between the second limiting plate (14) and the first limiting plate (13) constitutes the positioning guide part (41), which can be used to limit the end position of the positioning guide part (41).
5. A positioning and guiding tool for filter element folding according to claim 4, characterized in that, The guide rod assembly consists of two sets, which are respectively located at the front and rear ends near the fixed side plate (11).
6. A positioning and guiding tool for filter element folding according to claim 4, characterized in that, Both the first limiting plate (13) and the second limiting plate (14) are provided with threaded holes, and the threaded holes correspond to at least one of the guide rods. Locking bolts are provided on the threaded holes.
7. A positioning and guiding tool for filter element folding according to claim 4, characterized in that, A fixed base plate (15) is also connected between the two fixed side plates (11), and the fixed base plate (15) is provided with a positioning indicator structure.
8. A filter cartridge folding machine, characterized in that: It includes the positioning and guiding tooling as described in any one of claims 1-7.