A filter paperboard punching mechanism

Abstract

This utility model discloses a filter paperboard punching mechanism, relating to the field of filter paperboard processing technology. It includes a hydraulic punching main unit, with a punching worktable on the front side of the main unit. A lower punching die is fixedly connected to the upper front end of the worktable. A hydraulic telescopic rod is fixedly connected to the upper end of the main unit via a cantilever, positioned directly above the lower punching die. Through the use of elastic heating support pads and elastic pressure pads, the loose fiber structure of the filter paperboard is effectively prevented from being compacted, ensuring the air permeability and filtration efficiency of the filter paperboard. Simultaneously, the elastic heating support pads heat the filter paperboard when in contact with it, softening the fibers and preventing brittle breakage, thus improving the quality of the punching process. Furthermore, the elastic pressure pads further reduce the direct impact of the punching blade on the paperboard, resulting in a smoother punching edge, reducing burrs and fiber damage, and improving the overall quality of the product.

Description

Technical Field

[0001] This utility model relates to the field of filter paperboard processing technology, specifically to a filter paperboard punching mechanism. Background Technology

[0002] Filter paperboard, also known as filter cartridge paperboard, is used to press and manufacture gaskets or frames for filters, specifically for filtering engine oil in automobiles, tractors, and other applications. The paper is loose and thick, offering good air permeability and filtration efficiency. It is typically made entirely from bleached cotton pulp, which is beaten with free long fibers. Melamine wet-strength resin is added to the pulp, and after papermaking, the paper surface is treated with phenolic resin and silicone to give it certain water and moisture resistance.

[0003] Most filter paperboard punching equipment uses a rigid flat worktable combined with a mechanical pressing device. Rigid pressing reduces the air permeability of the paperboard. Furthermore, the die blade is designed with a single-angle straight-cut structure, and the peak pressure during punching exceeds the material's compressive strength, causing damage to the fiber structure. To address this, we propose a filter paperboard punching mechanism. Utility Model Content

[0004] The purpose of this invention is to address the problem that most filter paperboard punching equipment uses a rigid flat worktable combined with a mechanical pressing device, which leads to a decrease in the air permeability of the paperboard due to rigid pressing. Furthermore, the die blade is designed with a single-angle straight-cut structure, causing the peak pressure during punching to exceed the material's compressive strength, resulting in damage to the fiber structure. This invention provides a filter paperboard punching mechanism.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0006] A filter paperboard punching mechanism includes a hydraulic punching main unit. A punching worktable is provided on the front side of the hydraulic punching main unit, and a lower punching die is fixedly connected to the upper front end of the punching worktable. A hydraulic telescopic rod is fixedly connected to the upper end of the hydraulic punching main unit via a cantilever, and the hydraulic telescopic rod is located directly above the lower punching die. A punching pressure seat is fixedly connected downwards to the movable inner rod of the hydraulic telescopic rod. An upper punching die is provided on the lower side of the punching pressure seat. A butt cutting frame is fixedly connected to the upper side of the lower punching die corresponding to the outer edge cutting position of the filter paperboard, and an elastic heating support pad is fixedly connected to the center of the butt cutting frame. A punching cutting edge is fixedly connected to the bottom of the upper punching die, and the cutting edge of the punching cutting edge is located corresponding to the outer edge of the butt cutting frame. An elastic pressure pad is fixedly connected to the center of the punching cutting edge.

[0007] Furthermore, the elastic heating support pad is a silicone pad with an embedded nickel-chromium alloy heating wire, and a driving power supply is provided at the bottom of the elastic heating support pad corresponding to the nickel-chromium alloy heating wire.

[0008] Furthermore, the bottom cutting edge of the punching edge is divided into three sections: the upper section is a 30° chamfered transition zone with a height of 2mm, the middle section is a 5° progressive compression zone with a height of 1.5mm, and the lower section is a sharp cutting zone with a height of 0.5mm.

[0009] Furthermore, a rotary cutting and transfer mechanism is provided at the upper end of the punching worktable. Multiple upper punching dies are installed on the rotary cutting mechanism. The moving paths of the multiple upper punching dies correspond to the bottom of the punching pressure seat and the upper side of the lower punching die. The rotary cutting and transfer mechanism includes a spring telescopic support rod. The movable inner rod of the spring telescopic support rod is fixedly connected to a rotary indexer facing upward. The outer wall of the rotary indexer is fixedly connected to an upper die fixing turntable. The multiple upper punching dies are fixed to the outer wall of the upper die fixing turntable by bolts at equal intervals.

[0010] Furthermore, the fixed end of the rotary indexer is fixedly connected to the upper mold fixed turntable, and the rotating end of the rotary indexer is fixedly connected to the upper center of the spring telescopic support rod through a key connection.

[0011] Furthermore, an annular baffle is fixedly connected to the outer edge of the upper end of the movable inner rod of the spring telescopic support rod, and a plane bearing is provided at the position where the upper end of the annular baffle contacts the bottom surface of the upper mold fixed turntable.

[0012] Furthermore, the rotary cutting and transfer mechanism also includes a spring telescopic cylinder. Multiple spring telescopic cylinders are fixedly connected to the outer centers of multiple upper punching dies, and the movable inner rod of the spring telescopic cylinder protrudes downward from the bottom surface of the upper punching die. A receiving bucket is placed on the front side of the punching worktable corresponding to the bottom of the upper punching die. A protruding docking platform is provided on the rear center of the lower punching die and the outer side of the receiving bucket corresponding to the movable inner rod of the spring telescopic cylinder. A communicating cavity is fixedly provided on the inner side of the elastic pressure pad at the bottom center of the upper punching die, and multiple communicating suction holes are opened on the bottom surface of the communicating cavity corresponding to the elastic pressure pad.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. In this utility model, the raw material paperboard is placed on the lower die by a conveying mechanism or manually. The area to be cut is aligned with the cutting frame. A hydraulic punching host is installed, and the upper end of the hydraulic punching host is connected to a hydraulic telescopic rod. The hydraulic telescopic rod drives the punching pressure seat to press down, pressing the upper die and the upper end of the lower die together. The punching blade on the bottom of the upper die and the cutting frame on the upper end of the lower die cooperate to cut the filter paperboard, thus completing the punching of the filter paperboard. The shape and size of the cutting frame and the punching blade can be selected according to the size requirements of the finished product, and different specifications can be selected to suit different filter paperboard punching processes. The elastic heating support pad and elastic pressure pad can reduce the vertical pressure on the central area of ​​the punched filter paperboard, effectively preventing the loose fiber structure of the filter paperboard from being compacted, ensuring the air permeability and filtration efficiency of the filter paperboard. At the same time, when the elastic heating support pad comes into contact with the filter paperboard, it can heat the filter paperboard, soften the fibers and prevent brittle breakage, thus improving the quality of the punching process. Meanwhile, the elastic pressure pad further reduces the direct impact of the cutting edge on the cardboard, making the cutting edge smoother, reducing burrs and fiber damage, and improving the overall quality of the product.

[0015] 2. This utility model, through the setting of nickel-chromium alloy heating wire and silicone pad, can ensure that the raw paperboard in contact with the elastic support is heated at the same time, thereby improving the flexibility and extensibility of the paperboard, reducing the pressure peak at the moment of punching, preventing damage to the fiber structure, and softening the paperboard by heating, making it easier for the punching blade to enter, reducing punching resistance, and improving punching efficiency.

[0016] 3. This utility model reduces the peak pressure at the cutting position during the punching of filter paperboard by setting a three-section cutting edge, which greatly reduces the fiber breakage rate. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present invention;

[0018] Figure 2 This is a side sectional view of the present invention;

[0019] Figure 3 This is a utility model Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 This is a utility model Figure 2 Enlarged view of point B in the middle;

[0021] Figure 5 This is a cross-sectional structural diagram of the punching cutting edge of this utility model.

[0022] Reference numerals in the attached drawings: 1. Hydraulic punching main unit; 2. Punching worktable; 3. Hydraulic telescopic rod; 4. Punching pressure seat; 5. Lower punching die; 6. Butt cutting frame; 7. Elastic heating support pad; 8. Spring telescopic support rod; 9. Rotary indexer; 10. Upper die fixing turntable; 11. Upper punching die; 12. Punching cutting edge; 13. Elastic pressure pad; 14. Spring telescopic cylinder; 15. Connecting cavity; 16. Receiving bucket. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0024] Please see Figures 1-5 This utility model provides a filter paperboard punching mechanism, including a hydraulic punching host 1. A punching worktable 2 is provided on the front side of the hydraulic punching host 1, and a lower punching die 5 is fixedly connected to the upper front side of the punching worktable 2. A hydraulic telescopic rod 3 is fixedly connected to the upper end of the hydraulic punching host 1 via a cantilever, and the hydraulic telescopic rod 3 is located directly above the lower punching die 5. A punching pressure seat 4 is fixedly connected downwards to the movable inner rod of the hydraulic telescopic rod 3. An upper punching die 11 is provided on the lower side of the punching pressure seat 4. A butt cutting frame 6 is fixedly connected to the upper side of the lower punching die 5 corresponding to the outer edge cutting position of the filter paperboard, and an elastic heating support pad 7 is fixedly connected to the center of the butt cutting frame 6. A punching blade 12 is fixedly connected to the bottom of the upper punching die 11, and the blade edge of the punching blade 12 is located corresponding to the outer edge of the butt cutting frame 6. An elastic pressure pad 13 is fixedly connected to the center of the punching blade 12.

[0025] In this embodiment, preferably, the elastic heating support pad 7 is a silicone pad with an embedded nickel-chromium alloy heating wire, and a driving power supply is provided at the bottom of the elastic heating support pad 7 corresponding to the nickel-chromium alloy heating wire; by setting the nickel-chromium alloy heating wire and silicone pad, it is possible to ensure that the elastic support is in contact while heating the raw paperboard at the contact position with the elastic heating support pad 7, thereby improving the flexibility and extensibility of the paperboard, reducing the pressure peak at the moment of punching, preventing the fiber structure from being damaged, and at the same time, heating can soften the paperboard, making it easier for the punching blade 12 to cut in, reducing punching resistance, and improving punching efficiency.

[0026] In this embodiment, preferably, the bottom cutting edge of the punching blade 12 is divided into three sections: the upper section is a 30° chamfered transition zone with a height of 2mm, the middle section is a 5° progressive compression zone with a height of 1.5mm, and the lower section is a sharp cutting zone with a height of 0.5mm. By setting the three-section cutting edge, the peak pressure at the cutting position during the punching of the filter paperboard is reduced, which greatly reduces the fiber breakage rate.

[0027] In this embodiment, preferably, a rotary cutting and transfer mechanism is provided at the upper end of the punching workbench 2. A plurality of upper punching dies 11 are installed on the rotary cutting mechanism. The moving paths of the plurality of upper punching dies 11 are arranged corresponding to the bottom of the punching pressure seat 4 and the upper side of the lower punching die 5. The rotary cutting and transfer mechanism includes a spring telescopic support rod 8. The movable inner rod of the spring telescopic support rod 8 is fixedly connected to a rotary indexer 9 facing upward, and the outer wall of the rotary indexer 9 is fixedly connected to an upper die fixing turntable 10. The plurality of upper punching dies 11 are fixed to the outer wall of the upper die fixing turntable 10 by bolts at equal intervals. Through the provided spring telescopic support rod 8, the spring telescopic support rod 8 can retract when the upper punching die 11 is pushed down by the punching pressure seat 4, which facilitates the lower movement of the upper punching die 11 for punching, and at the same time provides buffering and guidance for the punching of the upper punching die 11.

[0028] In this embodiment, preferably, the fixed end of the rotary indexer 9 is fixedly connected to the upper mold fixed turntable 10, and the rotating end of the rotary indexer 9 is fixedly connected to the upper center of the spring telescopic support rod 8 by a key connection; the rotary indexer 9 can drive the upper mold fixed turntable 10 to rotate, so that multiple punching upper molds 11 move sequentially to the bottom of the punching pressure seat 4 to perform punching operations, thereby improving punching efficiency and enabling the cut filter paperboard to be transferred out.

[0029] In this embodiment, preferably, an annular baffle is fixedly connected to the outer edge of the upper end of the movable inner rod of the spring telescopic support rod 8, and a plane bearing is provided at the contact position between the upper end of the annular baffle and the bottom surface of the upper mold fixing turntable 10. The annular baffle and the plane bearing can improve the support effect at the contact position between the spring telescopic support rod 8 and the bottom surface of the upper mold fixing turntable 10, so that the impact force of the upper mold fixing turntable 10 subjected to the rear punching upper mold 11 can be evenly distributed on the annular baffle, reducing the lateral stress on the working section of the rotary indexer 9, improving the stability of the cooperative structure of the spring telescopic support rod 8 and the upper mold fixing turntable 10, and at the same time improving the service life of the rotary indexer 9.

[0030] In this embodiment, preferably, the rotary cutting and transfer mechanism further includes a spring telescopic cylinder 14. Multiple spring telescopic cylinders 14 are fixedly connected to the outer centers of multiple upper punching dies 11, with the movable inner rod of the spring telescopic cylinder 14 protruding downwards from the bottom surface of the upper punching die 11. A receiving bucket 16 is placed on the front side of the punching worktable 2, corresponding to the bottom of the upper punching die 11. The rear center of the lower punching die 5 and the outer side of the receiving bucket 16 correspond to the movable inner rod of the spring telescopic cylinder 14. The moving inner rod is provided with a protruding docking platform. A connecting cavity 15 is fixedly provided at the bottom center of the upper punching die 11 corresponding to the inner side of the elastic pressure pad 13. The elastic pressure pad 13 has multiple connecting suction holes on its bottom surface corresponding to the connecting cavity 15. A spring-loaded telescopic cylinder 14 is compressed when the upper punching die 11 approaches the lower punching die 5, causing air inside the spring-loaded telescopic cylinder 14 to be squeezed out through the connecting cavity 15 from the connecting suction holes at the center of the elastic pressure pad 13. After punching, the elastic pressure pad... The central connecting hole of 13 is in close contact with the surface of the filter paperboard. When the upper punching die 11 moves upward, a negative pressure is generated in the sleeve of the spring telescopic cylinder 14, so that the connecting cavity 15 is also in a negative pressure state. Since the high air permeability of the filter paperboard is based on the large pressure difference between the two sides, the negative pressure generated by the return spring in the spring telescopic cylinder 14 at the connecting cavity 15 can temporarily adsorb and fix the filter paperboard after punching. When the filter paperboard is transferred to the upper side of the receiving bucket 16 by the upper die fixing turntable 10, the upper die fixing turntable 10 is pushed down by the punching of the upper punching die 11, so that the spring telescopic cylinder 14 on the front punching die 11 can contact the receiving bucket 16, squeeze and release the filter paperboard, so that the filter paperboard falls into the receiving bucket 16 under the action of gravity and is collected. Through the structure of the spring telescopic cylinder 14 and the connecting cavity 15, the filter paperboard can be temporarily adsorbed and fixed during the punching process, effectively preventing the punched paperboard from scattering or shifting, and improving the accuracy and efficiency of punching. Meanwhile, the design of this structure can also ensure the stability of cardboard during transportation and collection, reduce the tediousness of manual operation, and improve the overall level of automation.

[0031] The working principle and usage process of this utility model are as follows: During use, the raw material cardboard is placed on the lower die 5 via a conveying mechanism or manually. The area to be cut is aligned with the cutting frame 6. A hydraulic punching host 1, with a hydraulic telescopic rod 3 at its upper end, drives the punching pressure seat 4 to press down, pressing the upper die 11 and the upper surface of the lower die 5 together. The cardboard is cut by the cooperation of the punching edge 12 on the bottom surface of the upper die 11 and the cutting frame 6 at the upper end of the lower die 5. The shape and size of the cutting edge 12 can be selected according to the finished product size requirements, making it suitable for different filter paperboard cutting processes. The elastic heating support pad 7 and elastic pressure pad 13 reduce the vertical pressure on the central area of ​​the filter paperboard during cutting, effectively preventing the compaction of the loose fiber structure and ensuring the air permeability and filtration efficiency of the filter paperboard. Simultaneously, the elastic heating support pad 7 heats the filter paperboard when in contact, softening the fibers and preventing brittle breakage, thus improving the quality of the cutting process. Furthermore, the elastic pressure pad 13 further reduces the direct impact of the cutting edge 12 on the paperboard, resulting in a smoother cutting edge, reducing burrs and fiber damage, and improving the overall product quality.

[0032] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. 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 the present invention. Therefore, the present invention 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 disclosed herein.

Claims

1. A filter paperboard punching mechanism, characterized in that: The device includes a hydraulic punching host (1), a punching workbench (2) is provided on the front side of the hydraulic punching host (1), and a punching lower die (5) is fixedly connected to the upper front side of the punching workbench (2). A hydraulic telescopic rod (3) is fixedly connected to the upper end of the hydraulic punching host (1) via a cantilever, and the hydraulic telescopic rod (3) is located directly above the punching lower die (5). A punching pressure seat (4) is fixedly connected to the movable inner rod of the hydraulic telescopic rod (3) facing downward. A punching upper die (11) is provided on the lower side of the punching pressure seat (4). A butt cutting frame (6) is fixedly connected to the upper side of the punching lower die (5) corresponding to the outer edge cutting position of the filter paperboard. An elastic heating support pad (7) is fixedly connected to the center of the butt cutting frame (6). A punching cutting edge (12) is fixedly connected to the bottom of the punching upper die (11), and the cutting edge of the punching cutting edge (12) is set to the outer edge of the butt cutting frame (6). An elastic pressure pad (13) is fixedly connected to the center of the punching cutting edge (12).

2. The filter paperboard punching mechanism according to claim 1, characterized in that: The elastic heating support pad (7) is a silicone pad with an embedded nickel-chromium alloy heating wire, and a driving power supply is provided at the bottom of the elastic heating support pad (7) corresponding to the nickel-chromium alloy heating wire.

3. The filter paper board punching mechanism according to claim 1, wherein: The bottom cutting edge (12) of the punching edge is divided into three sections: the upper section is a 30° chamfered transition zone with a height of 2mm, the middle section is a 5° progressive compression zone with a height of 1.5mm, and the lower section is a sharp cutting zone with a height of 0.5mm.

4. The filter paper board punching mechanism according to claim 1, wherein: The upper end of the punching workbench (2) is provided with a rotary cutting transfer mechanism. Multiple punching upper dies (11) are installed on the rotary cutting transfer mechanism. The moving paths of the multiple punching upper dies (11) are set at the bottom of the punching pressure seat (4) and the upper side of the punching lower die (5). The rotary cutting transfer mechanism includes a spring telescopic support rod (8). The movable inner rod of the spring telescopic support rod (8) is fixedly connected to a rotary indexer (9) facing upward. The outer wall of the rotary indexer (9) is fixedly connected to an upper die fixing turntable (10). The multiple punching upper dies (11) are fixed to the outer wall of the upper die fixing turntable (10) by bolts at equal intervals.

5. The filter paper board punching mechanism according to claim 4, wherein: The fixed end of the rotary indexer (9) is fixedly connected to the upper mold fixed turntable (10), and the rotating end of the rotary indexer (9) is fixedly connected to the upper center of the spring telescopic support rod (8) by a key.

6. The filter paper board punching mechanism according to claim 5, wherein: The upper edge of the movable inner rod of the spring telescopic support rod (8) is fixedly connected to a ring baffle, and a plane bearing is provided at the position where the upper end of the ring baffle meets the bottom of the upper mold fixed turntable (10).

7. The filter paper board punching mechanism according to claim 4, wherein: The rotary cutting and transfer mechanism also includes a spring telescopic cylinder (14). The spring telescopic cylinder (14) is fixedly connected to the outer center of the multiple upper punching dies (11) one by one. The movable inner rod of the spring telescopic cylinder (14) protrudes downward from the bottom surface of the upper punching die (11). A receiving bucket (16) is placed on the front side of the punching workbench (2) corresponding to the bottom of the upper punching die (11). A protruding docking platform is provided on the rear center of the lower punching die (5) and the outer side of the receiving bucket (16) corresponding to the movable inner rod of the spring telescopic cylinder (14). A connecting cavity (15) is fixedly provided on the inner side of the elastic pressure pad (13) corresponding to the bottom center of the upper punching die (11). The elastic pressure pad (13) is provided with multiple connecting adsorption holes on the bottom surface of the connecting cavity (15).

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