Filter paper cutting device of filter

Abstract

The invention discloses a filter paper cutting device of a filter, and relates to the technical field of filter production, the filter paper cutting device comprises a rack, the upper end part of the rack is provided with a filter paper supporting plate, the upper end face of the filter paper supporting plate is provided with a protruding part matched with a filter paper crease, the two sides of the protruding part in the transverse direction are both provided with cutting knives, and the two cutting knives are oppositely arranged; the rack is provided with a moving part used for driving the cutting knife to reciprocate in the length direction of the filter paper supporting plate, the moving range of the cutting knife is larger than the width of filter paper, the filter paper supporting plate is provided with receding grooves corresponding to the cutting knife in the length direction, and the cutting knife is inserted into the corresponding receding grooves. The two cutting knives are matched to cut tooth tips of creases of the filter paper, so that a notch for containing a splicing object is formed in the end of the filter paper, the notch is directly formed in the end of the filter paper in the filter paper cutting process, and the processing convenience of the filter paper is improved.

Description

Technical Field

[0001] This invention relates to the field of filter manufacturing technology, and in particular to a filter paper cutting device for filters. Background Technology

[0002] Filters are key components widely used in automobiles, industrial equipment, and other fields. Their core function is to filter impurities from fluids using filter paper. To improve filtration efficiency, the filter paper is typically designed with a corrugated shape to increase the filtration area. During filter manufacturing, filter paper of a certain length is cut from a roll and wound into a ring before being installed in the filter to further increase the filtration area.

[0003] Related technology can be found in Chinese Patent No. CN114572752B, which discloses an automated filter element processing and shearing machine. The machine includes a frame, with one end for feeding and the other for discharging. Feeding rollers and transition rollers are installed at the feeding end of the frame. It also includes a horizontal transition mechanism for filter paper material, an anti-wrinkle and flattening mechanism for filter paper material edges, a vertical shearing mechanism for filter paper material, a bidirectional downward pressure stabilizing mechanism for filter paper material, and an automatic discharging mechanism. This automated filter element processing and shearing machine utilizes two sets of horizontal transition mechanisms to ensure horizontal conveying of the filter paper material. Simultaneously, the anti-wrinkle and flattening mechanism prevents wrinkles from forming at the edges of the filter paper material. The bidirectional downward pressure stabilizing mechanism presses down on the filter paper material to ensure its stability. The automatic discharging mechanism enables automatic discharging.

[0004] Regarding the aforementioned technologies, after the filter paper is cut, the cut ends of the filter paper need to be assembled and spliced ​​to ensure the sealing and service life of the filter paper. In the industry, when splicing the cut filter paper, clamping strips or glue are often used for fixing. However, for ease of measurement, the filter paper is usually cut along the peak or trough of the fold. Therefore, the fold height of the cut parts of the spliced ​​filter paper is also consistent, which can easily cause the clamping strip or glue to be higher than the filter paper's filter layer. This makes it difficult to install the filter paper in the end cap of the filter when assembling the filter, and the concentricity and performance of the filter paper after installation will also be affected. Summary of the Invention

[0005] To address the aforementioned problems, this application provides a filter paper cutting device for a filter.

[0006] This application provides a filter paper cutting device for a filter, which adopts the following technical solution: A filter paper cutting device for a filter includes a frame, a filter paper support plate at the upper end of the frame, a protrusion on the upper surface of the filter paper support plate adapted to the creases of the filter paper, and cutting blades on both sides of the protrusion along the transverse direction. The two sets of cutting blades are arranged opposite each other, and the frame is provided with a moving part for driving the cutting blades to reciprocate along the length direction of the filter paper support plate. The moving range of the cutting blades is greater than the width of the filter paper. The filter paper support plate has clearance grooves corresponding to the cutting blades along the length direction. The cutting blades are inserted into the corresponding clearance grooves. The two cutting blades cooperate to cut the tips of the creases of the filter paper, so that the end of the filter paper forms a notch for accommodating spliced ​​materials.

[0007] By adopting the above technical solution, the frame supports the filter paper support plate. When cutting the filter paper, the part of the filter paper to be cut is placed on the filter paper support plate, and the lower end face of the filter paper is placed against the protrusion. In the initial state, the cutting blade is located at one end of the filter paper support plate. When cutting the filter paper, the moving part drives the two sets of cutting blades to move along the corresponding clearance groove. Under the support of the filter paper support plate, the two sets of cutting blades work together to cut off the tip of the filter paper crest, so that notches for accommodating the clamping strip or glue are pre-formed at both ends of the filter paper, so that after splicing, the splice at the splice is level with the crest or trough of other wavy parts of the filter paper, which is beneficial to improving the installation convenience and filtration performance of the filter paper.

[0008] Optionally, it also includes: a pressing frame, located above the filter paper support plate and slidably connected to the frame in the vertical direction; the frame is provided with a positioning component for fixing the pressing frame; the lower end of the pressing frame is provided with two sets of pressing rollers parallel to the filter paper support plate; the two sets of pressing rollers are respectively located on both sides of the protrusion; the two cutting blades are located between the two pressing rollers; the pressing frame is vertically hinged with a support part; the pressing rollers are rotatably connected to the support part around their own axis; an elastic element is provided between the support part and the pressing frame; in the natural state of the elastic element, the pressing rollers are away from the pressing frame.

[0009] By adopting the above technical solution, in the initial state, the clamping frame is located away from the filter paper support plate. At this time, a gap is formed between the clamping roller and the filter paper support plate for the filter paper to pass through. Pressing down the clamping frame causes the clamping frame to drive the clamping roller closer to the upper surface of the filter paper through the support arm. After the clamping roller contacts the filter paper, it pushes the filter paper to contact the filter paper support plate. The clamping frame continues to move, causing the clamping roller to move along the protrusion, thereby making the filter paper adhere to the filter paper support plate. At this time, the elastic element deforms to apply a downward force to the clamping roller. After the clamping frame is positioned by the positioning element, the filter paper can be cut with a cutting knife, which helps to improve the cutting accuracy of the filter paper.

[0010] Optionally, the positioning component includes an elastic element two and a stop ring. The elastic element two is located between the pressing frame and the machine frame. In its natural state, it pushes the pressing frame away from the filter paper support plate. The stop ring is located above the pressing frame and is rotatably connected to the machine frame in the lateral direction. A stop rod is fixedly connected to the outer circle of the stop ring along the axial direction. When the lower end of the stop rod abuts against the upper end face of the pressing frame, the pressing roller approaches the pressing frame, and the elastic element one is in a deformed state.

[0011] By adopting the above technical solution, in the initial state, the stop rod and the pressing frame are staggered. When the pressing frame drives the pressing roller to press and position the filter paper, the elastic element deforms and supports the pressing frame. Rotating the stop ring moves the stop rod above the pressing frame. At this time, the stop rod prevents the pressing frame from resetting, so that the pressing frame remains in position.

[0012] Optionally, a pressing plate is provided at the lower end of the pressing frame. The pressing plate is located directly above the protrusion and between the two sets of cutting blades. An elastic element three is provided between the pressing frame and the pressing plate. In its natural state, the elastic element three pushes the pressing plate away from the pressing frame. The lower end surface of the pressing plate is provided with a groove that matches the protrusion.

[0013] By adopting the above technical solution, after the pressing frame presses the filter paper onto the filter paper support plate through the pressing roller, the pressing frame continues to press down, so that the pressing plate contacts the upper surface of the filter paper. During the cutting process, the pressing plate presses and positions the part of the filter paper that is cut off through the inner wall of the groove, thereby reducing the probability of deformation under elastic action that affects the cutting effect. The pressing plate and the pressing frame are movably connected, and the pressing frame is supported by the three elastic elements of the pressing plate.

[0014] Optionally, the pressing plate has an air inlet groove communicating with the groove along its length. The filter paper is located between the pressing plate and the filter paper support plate. When the pressing plate and the filter paper support plate cooperate to press the filter paper, the inner wall of the air inlet groove and the upper surface of the filter paper form an air inlet channel.

[0015] By adopting the above technical solution, when the clamping frame drives the clamping plate to move up and reset, external gas can enter between the clamping plate and the cut waste material along the air inlet channel, so that the waste material can be removed from under the clamping plate.

[0016] Optionally, the clamping plate has several openings along the vertical direction, and the openings are arranged along the length of the clamping plate. A top plate is provided in each opening. The top plate is slidably connected to the clamping frame along the vertical direction. The clamping frame is provided with an elastic element four for pushing the top plate away. When both elastic element three and elastic element four are in their natural state, the height of the lower end face of the top plate is lower than the lower end face of the clamping plate.

[0017] By adopting the above technical solution, the pressing frame is supported and positioned by the four elastic elements on the top plate. When the pressing frame moves down, the top plate first contacts the filter paper. When the pressing frame drives the pressing plate to reset, the pressing plate moves first. At this time, the top plate maintains the pressing of the filter paper under the action of the four elastic elements, which further facilitates the filter paper to detach from the pressing plate.

[0018] Optionally, the frame is provided with two sets of limiting members along its length. During the filter paper cutting process, the filter paper passes between the two sets of limiting members. The two limiting members cooperate to restrict the offset of the filter paper along its width, and the distance between the two sets of limiting members can be adjusted.

[0019] By adopting the above technical solution, when placing the filter paper, the two sets of limiting members restrict the offset of the filter paper in the width direction, thereby improving the convenience of placing the filter paper.

[0020] Optionally, the frame is detachably connected to an adhesive plate, which is located directly below the filter paper support plate, and the upper surface of the adhesive plate is coated with adhesive. The projection of the clearance groove on the horizontal plane is located on the upper surface of the adhesive plate.

[0021] By adopting the above technical solution, the debris generated during the cutting process passes through the clearance groove and falls onto the adhesive plate. The adhesive coated on the adhesive plate is used to stick and fix the debris, which helps to maintain the cleanliness of the working environment.

[0022] Optionally, the filter paper support plate has an clearance opening at its top, which is located between two clearance slots.

[0023] By adopting the above technical solution, when handling waste materials, operators can pinch the filter paper waste along the clearance opening, which makes it easier to remove the filter paper from the filter paper support plate.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. The frame supports the filter paper support plate. When cutting the filter paper, the part of the filter paper to be cut is placed on the filter paper support plate, and the lower end of the filter paper is placed against the protrusion. In the initial state, the cutting blade is located at one end of the filter paper support plate. When cutting the filter paper, the moving part drives the two sets of cutting blades to move along the corresponding clearance groove. Under the support of the filter paper support plate, the two sets of cutting blades work together to cut off the tip of the filter paper crest, so that notches for accommodating the clamping strip or glue are pre-formed at both ends of the filter paper, so that after splicing, the splice at the splice is level with the crest or trough of other wavy parts of the filter paper, which is beneficial to improving the installation convenience and filtration performance of the filter paper. 2. In the initial state, the clamping frame is located away from the filter paper support plate. At this time, a gap is formed between the clamping roller and the filter paper support plate for the filter paper to pass through. Pressing down the clamping frame causes the clamping frame to drive the clamping roller closer to the upper surface of the filter paper through the support arm. After the clamping roller contacts the filter paper, it pushes the filter paper to contact the filter paper support plate. The clamping frame continues to move, causing the clamping roller to move along the protrusion, thereby making the filter paper adhere to the filter paper support plate. At this time, the elastic element deforms and applies a downward force to the clamping roller. After the clamping frame is positioned by the positioning element, the filter paper can be cut with a cutting knife, which helps to improve the cutting accuracy of the filter paper. 3. After the pressing frame presses the filter paper onto the filter paper support plate by the pressing roller, the pressing frame continues to press down, so that the pressing plate contacts the upper surface of the filter paper. During the cutting process, the pressing plate presses and positions the part of the filter paper that is cut off through the inner wall of the groove, thereby reducing the probability of deformation under elastic action that affects the cutting effect. The pressing plate and the pressing frame are movably connected, and the pressing frame is supported by the three elastic elements of the pressing plate. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the embodiment.

[0026] Figure 2 This is a schematic diagram designed to highlight the structure of the clamping frame.

[0027] Figure 3 This is a schematic diagram designed to highlight the structure of the filter paper support plate.

[0028] Explanation of reference numerals in the attached drawings: 1. Frame; 11. Moving part; 111. Moving frame; 112. Mounting arm; 2. Filter paper support plate; 21. Clearance groove; 22. Clearance opening; 3. Cutting knife; 4. Pressing frame; 41. Pressing roller; 42. Support part; 43. Elastic element one; 5. Positioning element; 51. Elastic element two; 52. Stop ring; 521. Stop rod; 6. Pressing plate; 61. Elastic element three; 62. Air inlet groove; 63. Through port; 64. Top plate; 641. Elastic element four; 7. Limiting element; 71. Moving seat; 72. Limiting plate; 8. Adhesive plate. Detailed Implementation

[0029] The present application will be further described in detail below with reference to all the accompanying drawings.

[0030] This application discloses a filter paper cutting device for a filter.

[0031] Example: Refer to Figure 1 and Figure 2A filter paper cutting device for a filter includes a frame 1. A filter paper support plate 2 is mounted on the upper end of the frame 1. The middle area of ​​the filter paper support plate 2 protrudes upward to form a protrusion, so that two planes with an included angle are formed on both sides of the filter paper support plate 2 along the width direction. The included angle between the two planes is adapted to the crease of the filter paper. An adhesive plate 8 is also provided between the frame 1 and the filter paper support plate 2. The adhesive plate 8 is snapped into the frame 1 and can be separated from the frame 1 in the transverse direction. An installation gap adapted to the adhesive plate 8 is left between the filter paper support plate 2 and the frame 1.

[0032] Reference Figure 1 and Figure 2 The width of the adhesive plate 8 is not less than the width of the filter paper support plate 2. The projection of the filter paper support plate 2 onto the upper surface of the adhesive plate 8 falls on the upper surface of the adhesive plate 8. The upper surface of the adhesive plate 8 is coated with a cleanable adhesive, such as water-based PVA white glue. Two sets of cutting blades 3 are slidably connected to the frame 1 along the length of the filter paper support plate 2. The two sets of cutting blades 3 correspond to two planes respectively, and the cutting blades 3 are set perpendicular to the planes.

[0033] Reference Figure 1 and Figure 3 The filter paper support plate 2 has a clearance groove 21 along its length that is adapted to the cutting blade 3. The outer edge of the cutting blade 3 is inserted into the clearance groove 21, which extends through the filter paper support plate 2, so that the filter paper debris generated during the cutting process can pass through the clearance groove 21 and fall onto the adhesive plate 8. The frame 1 is provided with a moving part 11 for driving the cutting blade 3. Specifically, the moving part 11 includes a moving frame 111 and a mounting arm 112. The moving frame 111 is located above the filter paper support plate 2 and is slidably connected to the frame 1 along its length. The frame 1 is equipped with a sliding rod for supporting the movement of the moving frame 111. The mounting arm 112 is fixed to the lower end of the moving frame 111 and corresponds one-to-one with the cutting blade 3. The cutting blade 3 is mounted on the lower end of the mounting arm 112 and moves synchronously with the mounting arm 112. Furthermore, the frame 1 can also be equipped with a power component, such as a motor screw mechanism or a cylinder, to drive the moving frame 111 to move on its own.

[0034] Reference Figure 1 and Figure 2 A clamping frame 4 is vertically slidably connected to the frame 1. The clamping frame 4 is located above the filter paper support plate 2. Two mounting arms 112 pass through the middle of the clamping frame 4. Two sets of clamping rollers 41 are provided at the lower end of the clamping frame 4, and the two sets of clamping rollers 41 are located on the sides of the clamping frame 4 along the width direction. A support part 42 is vertically hinged to the lower end of the clamping frame 4. The clamping rollers 41 are arranged parallel to the filter paper support plate 2 and are rotatably connected to the support part 42 around their own axis. When the clamping frame 4 moves, the clamping rollers 41 move synchronously through the support part 42.

[0035] Reference Figure 1 and Figure 2An elastic element 43 is provided between the support part 42 and the pressing frame 4. The elastic element 43 is a torsion spring. One end of the torsion spring is fixedly connected to the support part 42 and the other end is fixedly connected to the pressing frame 4. In the natural state of the elastic element 43, the support part 42 is in a vertical state and the pressing roller 41 is in a state away from the pressing frame 4.

[0036] Reference Figure 1 and Figure 2 The frame 1 is also provided with a positioning element 5 corresponding to the pressing frame 4. The positioning element 5 includes an elastic element 51 and a stop ring 52. A vertical rod is fixedly connected to the frame 1 along the vertical direction. The vertical rod passes through the pressing frame 4 and is slidably connected to the pressing frame 4. The elastic element 51 is a spring. The spring is sleeved on the outside of the vertical rod, and one end of the spring is fixedly connected to the frame 1 and the other end is fixedly connected to the pressing frame 4. In its natural state, the elastic element 51 pushes the pressing frame 4 away from the filter paper support plate 2.

[0037] Reference Figure 1 and Figure 2 The stop ring 52 is located at the upper end of the vertical rod and is rotatably connected to the vertical plate in the horizontal direction. A stop rod 521 is fixed to the outside of the stop ring 52 and extends vertically downward. In the natural state of the elastic element 51, the stop rod 521 and the clamping frame 4 are staggered, and the clamping frame 4 is close to the stop ring 52. When cutting the filter paper, the filter paper is passed between the clamping roller 41 and the filter paper support plate 2. When the part of the filter paper to be cut is directly opposite the filter paper support plate 2, the clamping frame 4 is pressed down, so that the clamping frame 4 drives the clamping roller 41 to approach the filter paper through the support part 42. When the clamping roller 41 contacts the filter paper, it pushes the filter paper to contact the plane of the filter paper support plate 2, thereby making the filter paper stick to the filter paper support plate 2. At this time, the teeth of the filter paper are directly opposite the top of the protrusion.

[0038] Reference Figure 1 and Figure 2 The frame 1 has two sets of limiting members 7 along its length. Each limiting member 7 includes a movable seat 71 and a limiting plate 72. The movable seat 71 is slidably connected to the frame 1 along its length. The limiting plate 72 is positioned above the movable seat 71 and moves synchronously with it. The movable seat 71 is threadedly connected to a positioning bolt, which passes through the movable seat 71 and abuts against the frame 1. When the positioning bolt is tightened, it locks the movable seat 71 onto the frame 1, thus positioning the limiting member 7. When placing filter paper, the filter paper is positioned between the two limiting plates 72. The two limiting plates 72 cooperate to restrict the displacement of the filter paper along its width, thereby improving the stability of the filter paper placement.

[0039] Reference Figure 2 and Figure 3When the filter paper initially contacts the filter paper support plate 2, the pressing frame 4 continues to press down. At this time, the pressing roller 41 rolls downward along the plane, thus pressing the filter paper flat on the filter paper support plate 2. During the pressing process, the support part 42 rotates vertically, causing the elastic element 43 to gradually deform. A pressing plate 6 is also provided at the lower end of the pressing frame 4. The pressing plate 6 is located between the two mounting arms 112 and is arranged along the length of the filter paper support plate 2. The pressing plate 6 is slidably connected to the pressing frame 4 vertically, and an elastic element 61 is also provided between the pressing frame 4 and the pressing plate 6. The elastic element 61 is also made of spring. One end of the spring is fixedly connected to the pressing frame 4, and the other end is fixedly connected to the pressing plate 6. In the natural state of the elastic element 61, the pressing plate 6 is away from the pressing frame 4.

[0040] Reference Figure 2 and Figure 3 The clamping plate 6 is located between the two cutting blades 3, and the lower end of the clamping plate 6 has a groove that matches the top of the protrusion. After the pressure roller presses the filter paper onto the filter paper support plate 2, the clamping plate 6 contacts the upper surface of the filter paper, and then cooperates with the protrusion of the filter paper support plate 2 to clamp and position the filter paper.

[0041] Reference Figure 1 and Figure 2 After the pressing plate 6 presses the filter paper, the stop ring 52 is rotated, which causes the stop ring 52 to drive the stop rod 521 to move, thereby moving the stop rod 521 above the pressing frame 4. At this time, the stop ring 52 positions the pressing frame 4 through the stop rod 521.

[0042] Reference Figure 2 and Figure 3 The cutting blade 3 has a moving range greater than the width of the filter paper. The cutting blade 3 is moved by the moving part 11. When the cutting blade 3 moves along the relief groove 21, it cuts the filter paper and cuts the tooth tip of the filter paper, so that the end of the filter paper forms a notch for accommodating the splice. When splicing the filter paper later, the clamping strip or glue is placed at the notch so that the splice at the splice is level with the other peaks or valleys of the filter paper after splicing, which helps to improve the installation convenience and filtration performance of the filter paper.

[0043] Reference Figure 1 and Figure 2 After the cutting is completed, the positioning of the clamping frame 4 is released, so that the clamping frame 4 is reset under the action of the elastic element 51. The lower end of the clamping plate 6 is provided with an air inlet groove 62 that communicates with the groove along the length direction. When the clamping frame 4 drives the clamping plate 6 to separate from the waste material cut off by the filter paper, an air inlet channel is formed between the inner wall of the air inlet groove 62 of the clamping plate 6 and the upper end face of the filter paper, so that external gas can enter between the clamping plate 6 and the waste material, and the waste material can be easily removed from the clamping plate 6.

[0044] Reference Figure 1 and Figure 2Furthermore, the clamping plate 6 has multiple vertical openings 63 arranged along its length. Each opening 63 contains a top plate 64, which is slidably connected to the clamping frame 4 vertically. An elastic element 641, also a spring, is positioned between the clamping frame 4 and the top plate 64. One end of the spring is fixedly connected to the clamping frame 4, and the other end is fixedly connected to the top plate 64. In its natural state, the height of the top plate 64 is lower than the height of the clamping plate 6.

[0045] Reference Figure 1 and Figure 2 When the pressing plate 6 presses the filter paper, the top plate 64 is also in contact with the filter paper. The elastic element 641 is in a deformed state. After the cutting is completed, the pressing frame 4 drives the pressing plate 6 to separate from the cut waste material first. At this time, the top plate 64 is still in contact with the waste material under the action of the elastic element 641 until the waste material is completely separated from the pressing plate 6. The pressing frame 4 continues to move upward, thereby driving the top plate 64 to separate from the waste material.

[0046] Reference Figure 1 and Figure 2 The contact area between the top plate 64 and the waste is much smaller than that between the pressing plate 6 and the waste. This helps reduce the probability of the pressing plate 6 carrying away the waste during movement, making the waste easier to collect and process, and improving the cleanliness of the work site. The top of the protrusion of the filter paper support plate 2 has multiple clearance openings 22, located between two clearance grooves 21. After the top plate 64 separates from the waste, the operator can squeeze the filter paper waste at the clearance openings 22, making it easy to pick up and recycle the waste from the filter paper support plate 2.

[0047] The implementation principle of the filter paper cutting device for a filter according to an embodiment of this application is as follows: the filter paper is pressed onto the filter paper support plate 2 by the cooperation of the pressure roller 41 and the pressure plate 6. Then, two opposing cutting blades 3 are used to cut the filter paper, thereby dividing the filter paper into sections according to a preset length and leaving a notch at the end of the filter paper to accommodate the splicing material. When splicing the filter paper, the splicing material is located within the notch, so that the splicing point of the filter paper ring is level with the peaks or troughs of other positions, which helps to ensure the uniformity of the filter paper ring and improves the installation convenience and working performance of the filter paper.

[0048] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A filter paper cutting device for a filter, comprising a frame (1), characterized in that: The upper end of the frame (1) is provided with a filter paper support plate (2). The upper surface of the filter paper support plate (2) is provided with a protrusion adapted to the crease of the filter paper. Both sides of the protrusion are provided with cutting blades (3). The two sets of cutting blades (3) are arranged opposite each other. The frame (1) is provided with a moving part (11) for driving the cutting blades (3) to move back and forth along the length of the filter paper support plate (2). The moving range of the cutting blades (3) is greater than the width of the filter paper. The filter paper support plate (2) is provided with a relief groove (21) corresponding to the cutting blades (3) along the length. The cutting blades (3) are inserted into the corresponding relief grooves (21). The two cutting blades (3) work together to cut the teeth of the crease of the filter paper, so that the end of the filter paper forms a notch for accommodating the spliced ​​material.

2. The filter paper cutting device for a filter according to claim 1, characterized in that, Also includes: The pressing frame (4) is located above the filter paper support plate (2) and is slidably connected to the frame (1) in the vertical direction. The frame (1) is provided with a positioning part (5) for fixing the pressing frame (4). The lower end of the pressing frame (4) is provided with two sets of pressing rollers (41) parallel to the filter paper support plate (2). The two sets of pressing rollers (41) are located on both sides of the protrusion. The two cutting blades (3) are located between the two pressing rollers (41). The pressing frame (4) is hinged with a support part (42) in the vertical direction. The pressing roller (41) is rotatably connected to the support part (42) around its own axis. An elastic element (43) is provided between the support part (42) and the pressing frame (4). In the natural state of the elastic element (43), the pressing roller (41) is away from the pressing frame (4).

3. The filter paper cutting device for a filter according to claim 2, characterized in that: The positioning component (5) includes an elastic element two (51) and a stop ring (52). The elastic element two (51) is located between the pressing frame (4) and the frame (1). In its natural state, it pushes the pressing frame (4) away from the filter paper support plate (2). The stop ring (52) is located above the pressing frame (4) and is rotatably connected to the frame (1) in the transverse direction. The outer circle of the stop ring (52) is fixedly connected with a stop rod (521) in the axial direction. When the lower end of the stop rod (521) abuts against the upper end face of the pressing frame (4), the pressing roller (41) approaches the pressing frame (4), and the elastic element one (43) is in a deformed state.

4. The filter paper cutting device for a filter according to claim 2, characterized in that: The lower end of the clamping frame (4) is provided with a clamping plate (6), which is located directly above the protrusion and between the two sets of cutting blades (3). An elastic element (61) is provided between the clamping frame (4) and the clamping plate (6). In its natural state, the elastic element (61) pushes the clamping plate (6) away from the clamping frame (4). The lower end face of the clamping plate (6) is provided with a groove that matches the protrusion.

5. The filter paper cutting device for a filter according to claim 4, characterized in that: The pressing plate (6) has an air inlet groove (62) that communicates with the groove along its length. The filter paper is located between the pressing plate (6) and the filter paper support plate (2). When the pressing plate (6) and the filter paper support plate (2) work together to press the filter paper, the inner wall of the air inlet groove (62) and the upper surface of the filter paper form an air inlet channel.

6. The filter paper cutting device for a filter according to claim 4, characterized in that: The pressing plate (6) has several openings (63) in the vertical direction. The openings (63) are arranged along the length of the pressing plate (6). A top plate (64) is provided in each opening (63). The top plate (64) is slidably connected to the pressing frame (4) in the vertical direction. The pressing frame (4) is provided with an elastic element four (641) for pushing the top plate (64) away. When both the elastic element three (61) and the elastic element four (641) are in their natural state, the height of the lower end face of the top plate (64) is lower than the lower end face of the pressing plate (6).

7. The filter paper cutting device for a filter according to claim 1, characterized in that: The frame (1) is provided with two sets of limiting members (7) along the length direction. During the filter paper cutting process, it passes between the two sets of limiting members (7). The two limiting members (7) cooperate to limit the offset of the filter paper along the width direction, and the distance between the two sets of limiting members (7) can be adjusted.

8. The filter paper cutting device for a filter according to claim 1, characterized in that: The frame (1) is detachably connected to a sticking plate (8), which is located directly below the filter paper support plate (2). The upper surface of the sticking plate (8) is coated with adhesive, and the projection of the clearance groove (21) on the horizontal plane is located on the upper surface of the sticking plate (8).

9. The filter paper cutting device for a filter according to claim 1, characterized in that: The filter paper support plate (2) has an opening (22) at its top, which is located between two clearance grooves (21).

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