A low-loss, high-efficiency circular die-cutting machine

Abstract

This utility model relates to the field of circular die-cutting machines, specifically to a low-loss, high-efficiency circular die-cutting machine. Its technical solution includes a collection box, a fixed frame, a pressure roller, and a die-cutting roller. The collection box is installed on one side of the lower end of the fixed frame. The pressure roller and the die-cutting roller are rotatably connected in the middle of the fixed frame. The pressure roller is located above the die-cutting roller. Drive rollers are fixedly installed at both ends of the die-cutting roller. A transmission roller is installed on one side of the fixed frame. An air supply assembly is provided on one side of the outer end of the fixed frame. The beneficial effects of this utility model are: the die-cutting roller is designed as a fully enclosed hollow cavity, and spray holes are opened on the surface of each cut groove. High-pressure air is directly introduced into the cavity through a guide pipe and the internal channel of the drive roller. When the die-cutting roller rotates at high speed, the airflow is instantly blown out from the inside of the cut groove, forming a peeling air blade consistent with the material's movement direction. Before electrostatic adsorption occurs at the cut, the material being cut is blown away from the blade wall, eliminating the phenomenon of waste material at the cut.

Description

Technical Field

[0001] This utility model relates to the field of circular die-cutting machines, specifically to a low-loss, high-efficiency circular die-cutting machine. Background Technology

[0002] Circular die-cutting, as the mainstream process for continuous roll cutting, is widely used in fields such as electronic shielding materials, lithium battery copper foil, medical adhesive tape, and packaging labels. With the increasing trend towards thinner and more irregularly shaped end products, die-cutting precision and material utilization have become the focus of industry competition. Currently, circular die-cutting machines consist of two rollers: an upper pressure roller and a lower die-cutting roller. The die-cutting roller has grooves on its surface, allowing it to be die-cut into the desired shape. When the circular die-cutting machine starts, the pressure roller and the die-cutting roller rotate in opposite directions. The material to be die-cut (such as adhesive materials like film) passes between the pressure roller and the die-cutting roller. The pressure roller applies pressure above the material, ensuring it adheres tightly to the die-cutting roller surface for die-cutting. The die-cut material continues to be conveyed forward, and a collection box is placed below the material. Finally, the die-cut portion of the material falls into the collection box for collection.

[0003] However, in existing circular die-cutting machines, because the inner cavity of the die groove is a solid structure, the cut part is very likely to stick back to the die groove or die surface after the material is die-cut, making it impossible for the cut part to fall down. At this time, the die groove or die needs to be cleaned manually every time the machine stops, which results in low work efficiency. In addition, after some materials are cut, the cut part cannot be effectively separated from the material body, resulting in ineffective cutting.

[0004] Therefore, it is necessary to invent a low-loss, high-efficiency circular die-cutting machine. Utility Model Content

[0005] The purpose of this invention is to solve the problems mentioned in the background section.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a low-loss, high-efficiency circular die-cutting machine, comprising a collection box, a fixed frame, a pressure roller, and a die-cutting roller. The collection box is installed on one side of the lower end of the fixed frame. The pressure roller and the die-cutting roller are rotatably connected in the middle of the fixed frame. The pressure roller is located above the die-cutting roller. Transmission rollers are fixedly installed at both ends of the die-cutting roller. A transfer roller is installed on one side of the fixed frame. The collection box is located between the fixed frame and the transfer roller. An air supply assembly is provided on one side of the outer end of the fixed frame.

[0007] Based on the above characteristics, an integrated arrangement of pressing, air supply, and collection is formed, providing the foundation for the installation and airflow channels for subsequent anti-sticking and quick-release functions.

[0008] Preferably, a bearing seat is installed on one side surface of the fixed frame, a drive box is installed on one side of the outer end of the fixed frame, a drive gear is provided on the side of the fixed frame away from the drive box, and a sleeve is fixedly installed on one side of the outer wall of the fixed frame.

[0009] Based on the above features, a compact layout with single-sided drive and cantilever support is achieved, facilitating online maintenance.

[0010] Preferably, the inner cavity of the die-cutting roller is a hollow structure, and the surface of the die-cutting roller is provided with a cutting groove, with spray holes spaced apart in the middle of the cutting groove.

[0011] Based on the above features: the inner cavity forms a high-pressure air chamber, and the nozzles form a directional stripping airflow, solving the problem of chip re-adhesion.

[0012] Preferably, the transmission roller is a tubular structure with openings at both ends, a driven gear is fixedly installed at the outer end of the transmission roller, limit blocks are symmetrically installed on the inner wall of the transmission roller, and ball bearings are movably embedded on the surface of the limit blocks.

[0013] Based on the above features: the symmetrical limiting blocks on the inner wall are embedded with ball bearings, providing a rotating slide rail and low-friction support for the subsequent insertion of the guide tube.

[0014] Preferably, the air supply assembly includes a fan and an exhaust pipe connected to the output end of the fan. A three-way ball valve is installed at the other end of the exhaust pipe. A guide pipe is connected to the end of the three-way ball valve away from the exhaust pipe, and a branch pipe is installed on one side of the three-way ball valve.

[0015] Based on the above features: the main path is connected to the guide pipe to supply air to the inner cavity of the die roller; the branch path is connected to the branch pipe to provide secondary stripping air to the collection area; thus, the machine achieves synchronous anti-sticking under two pressures, improving the reliability of material falling.

[0016] Preferably, a check valve is installed on the side of the guide tube near the three-way ball valve, and guide slots are symmetrically formed on the surface of the guide tube away from the three-way ball valve. An annular groove is formed on one side of the guide slot, and the annular groove is formed on the surface of the guide tube. A sealing element is provided on the surface of the guide tube near the annular groove.

[0017] Based on the above features: the one-way valve prevents high pressure reverse leakage; the guide slot and the annular groove form an "insert, rotate and lock" quick-change structure.

[0018] Preferably, a nozzle is provided at the lower end of the branch pipe on the side away from the three-way ball valve, and the nozzle is located above the collection box.

[0019] Based on the above characteristics: a secondary wind-shearing impact is applied to the slices about to fall to completely destroy the residual adhesive, complete the final separation, and reduce the frequency of manual waste removal.

[0020] The beneficial effects of this utility model are:

[0021] 1. This utility model designs the die roller as a fully enclosed hollow cavity and opens spray holes on the surface of each dies. High-pressure air is directly introduced into the cavity through the guide tube and the internal channel of the transmission roller. When the die roller rotates at high speed, the airflow is blown out from the inside of the dies instantly, forming a peeling air blade in the same direction as the material movement. Before the cut is electrostatically attracted, the material to be cut is blown away from the dies wall, eliminating the phenomenon of waste material at the cut.

[0022] The three-way ball valve splits the airflow into a second path, which passes through a branch pipe and a nozzle. Before the material enters the collection box, it is subjected to secondary air cutting, which completely breaks the material that is still attached to the parent material, thus improving the product qualification rate. Since the waste removal process is completed simultaneously with the die cutting, the equipment does not need to be stopped for manual cleaning, avoiding damage to the equipment caused by repeated shutdowns and restarts, and improving work efficiency.

[0023] 2. The guide tube and the drive roller adopt a quick-release structure with slots, annular grooves, and balls. During installation, simply align the guide slot with the limit block and push it in. Then push the guide tube so that the limit block slides into the annular groove. Under the action of the balls, the guide tube remains stationary and automatically centers, while the drive roller can rotate normally. When disassembly is required, simply align the guide slot on the surface of the guide tube with the limit block, then pull the guide tube outward. Finally, the guide slot and the limit block slide back together to separate the guide tube and the drive roller. No bolts or wrenches are needed throughout the process. Attached Figure Description

[0024] Figure 1 A schematic diagram of the overall structure of a low-loss, high-efficiency circular die-cutting machine provided by this utility model;

[0025] Figure 2 This utility model provides a low-loss, high-efficiency circular die-cutting machine. Figure 1 A magnified view of the structure at point A in the middle;

[0026] Figure 3 A cross-sectional view of the transmission roller and air supply component of a low-loss, high-efficiency circular die-cutting machine provided by this utility model;

[0027] Figure 4 Another cross-sectional view of the transmission roller of a low-loss and high-efficiency circular die-cutting machine provided by this utility model;

[0028] Figure 5 A cross-sectional view of the guide tube of a low-loss, high-efficiency circular die-cutting machine provided by this utility model.

[0029] In the diagram: 1. Collection box; 2. Fixing frame; 21. Bearing seat; 22. Drive box; 23. Drive gear; 24. Sleeve; 3. Pressure roller; 4. Die roller; 41. Cutting groove; 42. Spray hole; 5. Transmission roller; 51. Driven gear; 52. Limit block; 53. Ball bearing; 6. Transfer roller; 7. Air supply assembly; 71. Fan; 72. Exhaust pipe; 73. Three-way ball valve; 74. Guide pipe; 741. Check valve; 742. Guide slot; 743. Annular groove; 744. Seal; 75. Branch pipe; 751. Nozzle. Detailed Implementation

[0030] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0031] See attached document Figure 1-5 This utility model provides a low-loss, high-efficiency circular die-cutting machine, comprising a collection box 1, a fixed frame 2, a pressure roller 3, and a die-cutting roller 4. The collection box 1 is installed on one side of the lower end of the fixed frame 2. The pressure roller 3 and the die-cutting roller 4 are rotatably connected in the middle of the fixed frame 2. The die-cutting roller 4 is integrally forged from 42CrMo alloy steel with a tempered hardness of HRC28-32. After precision machining, the inner cavity is chrome-plated (0.03mm thick) to prevent rust and reduce wind resistance. The pressure roller 3 is located above the die-cutting roller 4, and material can pass through between the pressure roller 3 and the die-cutting roller 4. The inner cavity of the die-cutting roller 4 is hollow. The structure facilitates the flow of gas within the die-cutting roller 4. The die-cutting roller 4 has a groove 41 on its surface for die-cutting materials. Spray holes 42 are spaced apart in the middle of the groove 41, allowing the gas introduced into the die-cutting roller 4 to be sprayed out through the spray holes 42. The pressure roller 3 can press the material above it, making the material adhere tightly to the die-cutting roller 4 for die-cutting. Drive rollers 5 are fixedly installed at both ends of the die-cutting roller 4. A transfer roller 6 is installed on one side of the fixed frame 2 to facilitate the material transport. The collection box 1 is located between the fixed frame 2 and the transfer roller 6. An air supply assembly 7 is provided on one side of the outer end of the fixed frame 2.

[0032] A bearing seat 21 is installed on one side surface of the fixed frame 2. The bearing seat 21 is drilled and reamed with the fixed frame 2. A positioning pin is used to prevent loosening. A drive box 22 is installed on one side of the outer end of the fixed frame 2. A drive gear 23 is set on the side of the fixed frame 2 away from the drive box 22. The drive box 22 has a built-in servo motor and planetary reducer. It is connected to the drive gear 23 through a rotating shaft (the rotating shaft and the transmission roller 5 can pass through the middle of the bearing seat 21).

[0033] The transmission roller 5 is a tubular structure with openings at both ends. A driven gear 51 is fixedly installed at the outer end of the transmission roller 5. The driving gear 23 and the driven gear 51 are meshed and connected, which facilitates the driving of the transmission roller 5 to rotate through the driven gear 51 (the pressure roller 3 is also driven to rotate by the driving gear 23 and the driven gear 51).

[0034] The air supply assembly 7 includes a fan 71 and an exhaust pipe 72 connected to the output end of the fan 71. The exhaust pipe 72 is a PU steel wire spiral pipe, and all joints are 316 stainless steel quick-connect fittings to ensure quick disassembly and assembly. A three-way ball valve 73 is installed at the other end of the exhaust pipe 72. A guide pipe 74 is connected to the end of the three-way ball valve 73 away from the exhaust pipe 72. The guide pipe 74 is made of 6061-T6 aluminum pipe. The guide pipe 74 can be inserted into one end of the transmission roller 5, which facilitates the introduction of gas into the die roller 4 through the guide pipe 74 and the transmission roller 5. Finally, the gas can be sprayed out through the spray hole 42 to prevent the cut material from adhering to the cutter groove 41.

[0035] A branch pipe 75 is installed on one side of the three-way ball valve 73, and a sleeve 24 is fixedly installed on one side of the outer wall of the fixing bracket 2. The branch pipe 75 can pass through the inside of the sleeve 24, which facilitates the support and fixation of the branch pipe 75 by the sleeve 24, so that the branch pipe 75 is located above the material and the collection box 1. A nozzle 751 is provided at the lower end of the side of the branch pipe 75 away from the three-way ball valve 73. The nozzle 751 is located above the collection box 1. The cut material can pass through the collection box 1 and the nozzle 751. The nozzle 751 is located above the material and the two do not contact each other. When the air source is sprayed out through the branch pipe 75 and the nozzle 751, the sprayed gas can impact the cut position and prevent some cut parts from sticking to the original material surface.

[0036] Limiting blocks 52 are symmetrically installed on the inner wall of the drive roller 5. Ball bearings 53 are movably embedded on the surface of the limiting blocks 52. A one-way valve 741 is installed on the side of the guide tube 74 near the three-way ball valve 73 to prevent backflow of the introduced gas. Guide slots 742 are symmetrically formed on the side of the guide tube 74 away from the three-way ball valve 73. An annular groove 743 is formed on one side of the guide slot 742. The annular groove 743 is formed on the surface of the guide tube 74. The guide slot 742 at one end of the guide tube 74 is aligned with the limiting block 52 on the inner wall of the drive roller 5. Then, the guide tube 74 is pushed into place. At this point, the guide slot 742 and the limiting block... 52 linear sliding connection, when the limiting block 52 passes through the guide slot 742 and reaches the inner side of the annular groove 743, the transmission roller 5 can rotate normally, while the guide tube 74 will remain stationary and will not rotate. The limiting block 52 rolls and rubs against the guide slot 742 and the inner wall of the annular groove 743 through the ball 53 to avoid wear and improve the sliding effect. When disassembly is required, simply align the guide slot 742 on the surface of the guide tube 74 with the limiting block 52, then pull the guide tube 74 outward, and finally the guide slot 742 and the limiting block 52 slide and connect again, so that the guide tube 74 and the transmission roller 5 are separated.

[0037] A sealing element 744 is provided on the side surface of the guide tube 74 near the annular groove 743. When the limiting block 52 is located inside the annular groove 743, the sealing element 744 on the surface of the guide tube 74 will be located between the guide tube 74 and the transmission roller 5 for sealing and protection.

[0038] The usage process of this utility model is as follows: When the machine is working, the material will pass through the pressure roller 3 and the die roller 4. At this time, the pressure roller 3 and the die roller 4 rotate in opposite directions, and the pressure roller 3 presses on the material, so that the cutting groove 41 on the surface of the die roller 4 rolls and cuts a continuous pattern on the surface of the material (the specific pattern can be set as needed). The inner cavity of the die-cutting roller 4 is hollow, and one end can be inserted into the stationary guide tube 74. After the blower 71 is started, high-pressure air is introduced into the inner cavity of the die-cutting roller 4 through the exhaust pipe 72, the three-way ball valve 73, the guide tube 74, and the transmission roller 5. Finally, it is blown out at high speed from the nozzle 42 to prevent the cut material from sticking back to the slit 41 or the surface of the die-cutting roller 4. At the same time, another airflow from the three-way ball valve 73 is sprayed downward from the nozzle 751 through the branch pipe 75 to perform secondary air cutting on the material that is about to fall into the collection box 1. When the guide tube 74 is inserted between the transmission rollers 5, the guide slot 742 and the limiting block 52 slide in a straight line. After reaching the bottom, the transmission roller 5 is rotated so that the limiting block 52 slides into the annular groove 743. At this time, the ball 53 changes the relative motion into rolling friction, and the guide tube 74 remains stationary. When it is necessary to change the die or perform maintenance, it can be pulled out by rotating in the opposite direction.

[0039] The above description is merely a preferred embodiment of this utility model. Any person skilled in the art may modify this utility model or modify it into an equivalent technical solution using the technical solutions described above. Therefore, any simple modifications or equivalent substitutions made based on the technical solutions of this utility model are within the scope of protection claimed by this utility model.

Claims

1. A low-loss high-efficiency round knife die-cutting machine, comprising a collecting box (1), a fixed frame (2), a press roller (3) and a die roller (4), the collecting box (1) is installed on one side of the lower end of the fixed frame (2), the press roller (3) and the die roller (4) are rotatably connected in the middle of the fixed frame (2), and the press roller (3) is located above the die roller (4), characterized in that: The die-cutting roller (4) is fixedly installed with transmission rollers (5) at both ends, and a transmission roller (6) is installed on one side of the fixed frame (2). The collection box (1) is located between the fixed frame (2) and the transmission roller (6). An air supply assembly (7) is provided on one side of the outer end of the fixed frame (2). ​ 2. A low loss high efficiency circular knife die cutter as claimed in claim 1 characterized in that: A bearing seat (21) is installed on one side of the fixed frame (2), a drive box (22) is installed on one side of the outer end of the fixed frame (2), a drive gear (23) is provided on the side of the fixed frame (2) away from the drive box (22), and a sleeve (24) is fixedly installed on one side of the outer wall of the fixed frame (2).

3. A low loss high efficiency circular knife die cutter as claimed in claim 1 characterized in that: The inner cavity of the die roller (4) is hollow, and the surface of the die roller (4) is provided with a slit (41), and the slit (41) is provided with spray holes (42) spaced apart in the middle.

4. A low loss high efficiency circular knife die cutter as claimed in claim 1 characterized in that: The transmission roller (5) is a tubular structure with open ends. A driven gear (51) is fixedly installed at the outer end of the transmission roller (5). Limiting blocks (52) are symmetrically installed on the inner wall of the transmission roller (5). Balls (53) are movably embedded on the surface of the limiting blocks (52).

5. A low loss high efficiency circular knife die cutter as claimed in claim 1 characterized in that: The air supply assembly (7) includes a fan (71) and an exhaust pipe (72) connected to the output end of the fan (71). A three-way ball valve (73) is installed at the other end of the exhaust pipe (72). A guide pipe (74) is connected to the end of the three-way ball valve (73) away from the exhaust pipe (72). A branch pipe (75) is installed on one side of the three-way ball valve (73).

6. A low loss high efficiency circular knife die cutter as claimed in claim 5 wherein: A one-way valve (741) is installed on the side of the guide tube (74) near the three-way ball valve (73). A guide slot (742) is symmetrically opened on the side of the guide tube (74) away from the three-way ball valve (73). An annular groove (743) is opened on one side of the guide slot (742). The annular groove (743) is opened on the surface of the guide tube (74). A sealing element (744) is provided on the side of the guide tube (74) near the annular groove (743).

7. A low loss high efficiency circular knife die cutter as claimed in claim 5 wherein: A nozzle (751) is provided at the lower end of the side of the branch pipe (75) away from the three-way ball valve (73), and the nozzle (751) is located above the collection box (1).

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