Corrugated paper cutting knife for carton production

Abstract

This utility model provides a corrugated paper cutting knife for carton production, belonging to the field of corrugated paper carton production technology. The corrugated paper cutting knife includes a blade body with a cutting edge for cutting corrugated paper and a mounting hole for fixing the blade body to a cutting device. The cutting edge includes a first cutting edge and a second cutting edge connected in sequence. The first cutting edge is used for initial cutting of the corrugated paper, and the second cutting edge is used for final cutting. A chip removal groove is provided on at least one side of the blade body for discharging paper scraps generated during the cutting process. A groove is provided on the side wall of the blade body to reduce resistance during cutting and reduce tool wear. This invention solves the problems of existing corrugated paper cutting knives that easily generate a large amount of paper dust and lint during cutting, resulting in rough cutting edges, rapid tool wear, and short tool life, which affect the production quality and efficiency of cartons.

Description

Technical Field

[0001] This utility model belongs to the field of corrugated cardboard box production technology, specifically, it relates to a corrugated paper cutting knife for cardboard box production. Background Technology

[0002] In the modern packaging industry, cardboard boxes are the primary transport packaging containers, and their production process is highly automated. Corrugated cardboard, as the basic material for manufacturing cardboard boxes, requires a series of processes such as printing, slotting, and die-cutting. Among these, the precise and high-speed cutting of large-format corrugated cardboard into specified sizes is a crucial step. Currently, high-speed cutting machines are commonly used on cardboard box production lines, and their core component is the cutting blade. Traditional corrugated cardboard cutting blades are typically single-edged, with blades made of ordinary tool steel or high-speed steel, using a sharp edge to shear or cut the high-speed moving corrugated cardboard. However, this traditional cutting method has inherent drawbacks. Because corrugated cardboard is composed of a linerboard, inner linerboard, and a corrugated core paper, its structure is relatively loose. Under high-speed impact, traditional single-edged blades largely rely on violently "splitting" or "tearing" the paper fibers to complete the cut, resulting in a large amount of paper dust and fine paper fibers at the cut. These paper dust particles not only pollute the production environment, but more seriously, they adhere to the surface of the cardboard, affecting the clarity and ink adhesion of subsequent printing. They can even accumulate on the machine's transmission components and sensors, causing equipment malfunctions and increasing maintenance costs. Furthermore, paper fibers are highly abrasive, and the cutting edges of traditional blades wear down quickly under high-speed friction, leading to dulling of the blades, increased burrs on the cut, and the need for frequent machine shutdowns to replace the blades. This severely impacts the continuity and overall efficiency of the production line. In other words, existing technologies suffer from the technical problems of corrugated paper cutting blades generating dust, producing poor cut quality, wearing out quickly, and having a short lifespan. Utility Model Content

[0003] In view of this, the present invention provides a corrugated paper cutting knife for carton production, which can solve the problems of existing corrugated paper cutting knives that easily generate a large amount of paper dust and paper lint during the cutting process, resulting in rough cutting edges, and the knife wears out quickly and has a short lifespan, which affects the production quality and efficiency of cartons.

[0004] This utility model is implemented as follows:

[0005] This utility model provides a corrugated paper cutting knife for carton production, including a knife body with a blade for cutting corrugated paper and a mounting hole for fixing the knife body to a cutting device. The blade includes a first cutting edge and a second cutting edge connected in sequence. The first cutting edge is used for initial cutting of the corrugated paper, and the second cutting edge is used for final cutting of the corrugated paper. A chip discharge groove is provided on at least one side of the knife body for discharging paper scraps generated during the cutting process. A groove is provided on the side wall of the knife body to reduce resistance during cutting and reduce tool wear.

[0006] The technical advantages of the corrugated paper cutting knife for carton production provided by this utility model are as follows: By setting a first cutting edge and a second cutting edge to divide the cutting function, and in conjunction with a chip removal groove, high-quality cutting of corrugated paper is achieved. The first cutting edge pre-cuts, the second cutting edge completely cuts through, and the chip removal groove ensures timely discharge of chips. The synergistic effect of these three elements constitutes the basic technical solution for achieving excellent cutting results in this utility model.

[0007] Based on the above technical solution, the corrugated paper cutting knife for carton production of this utility model can be further improved as follows:

[0008] The angle between the cutting edge forming the second cutting edge and the side surface of the blade body is greater than the angle between the cutting edge forming the first cutting edge and the side surface of the blade body, so that the second cutting edge plays a scraping role during cutting to reduce paper dust.

[0009] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by setting the second cutting edge to have a larger cutting angle than the first cutting edge, the second cutting edge cuts the remaining paper fibers more in a "scraping" rather than "chopping" manner. This method can smoothly cut the fibers instead of tearing them, thereby fundamentally reducing the generation of paper dust and burrs and improving the smoothness of the cut edge.

[0010] Furthermore, the chip removal groove is an arc-shaped groove extending along the blade direction. The chip removal groove is disposed on the side of the blade body adjacent to the second cutting edge, and is used to smoothly discharge the paper chips generated by the second cutting edge.

[0011] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the chip removal groove is designed as an arc-shaped groove close to the second cutting edge. Its smooth inner wall and the direction along the blade edge help to smoothly guide and discharge the fine paper scraps generated during cutting into the cutting area, avoiding the accumulation and friction of paper scraps between the blade body and the corrugated paper cutting edge, thereby protecting the cleanliness of the cut and reducing cutting resistance.

[0012] Furthermore, the blade body is integrally formed with reinforcing ribs, which are located on the side of the blade body away from the cutting edge, in order to improve the structural rigidity and vibration resistance of the blade body when subjected to cutting force.

[0013] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the addition of reinforcing ribs significantly improves the overall structural strength and rigidity of the blade. During high-speed cutting, the blade is subjected to enormous impact and reaction forces from the corrugated paper. The reinforcing ribs can effectively resist the bending deformation and vibration caused by these forces, ensuring the stability of the blade during cutting, thereby ensuring the consistency of cutting accuracy and depth.

[0014] Furthermore, a wear-resistant coating is applied to the surface of the blade to reduce the coefficient of friction during cutting and to increase the hardness and service life of the blade.

[0015] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the wear-resistant coating, such as a diamond-like carbon coating, has extremely high hardness and an extremely low coefficient of friction. It directly covers the blade edge, which is most prone to wear, greatly slowing down the wear process of the blade and extending the service life of the cutting tool; on the other hand, it reduces the friction between the blade and the paper, making the cutting process smoother and reducing energy consumption and heat generation.

[0016] Furthermore, it also includes a blade holder for mounting the blade body, the blade body being detachably connected to the blade holder by fastening bolts passing through mounting holes thereon, the blade holder being used to fix the cutting blade as a whole to the production equipment.

[0017] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: A standardized and quickly replaceable mounting structure is provided through the cooperation of the tool holder and the fastening bolts. When the tool body wears down and needs replacement or maintenance, the operator only needs to unscrew the fastening bolts to disassemble the tool body, install the new tool body, and then retighten it. This greatly reduces equipment downtime for maintenance and improves the overall operating efficiency of the production line.

[0018] Furthermore, a shock-absorbing pad is provided between the contact surfaces of the blade body and the blade holder. The shock-absorbing pad is made of elastic material and is used to absorb high-frequency vibrations generated during the cutting process.

[0019] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: The introduction of the damping pad forms a buffer layer between the blade body and the rigid blade holder. This buffer layer can effectively absorb and attenuate the subtle high-frequency vibrations generated during high-speed reciprocating or rotary cutting, preventing the vibration from being transmitted to the entire equipment. This not only further ensures the stability of cutting, but also reduces the noise and fatigue damage caused by vibration.

[0020] Furthermore, the first cutting edge is provided with a continuously arranged micro-serration structure, which is used to increase the biting force on the corrugated paper surface in the initial stage of cutting and prevent slippage.

[0021] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the micro-serrated structure changes the contact method of the traditional straight blade. These tiny serrations can "bite" into the surface of the paper like teeth the moment the blade contacts the corrugated paper. Especially for smooth corrugated paper with a film or wax coating, it can effectively prevent the blade from slipping on the paper surface, ensure the accuracy of the entry point, and make the cutting trajectory more precise and controllable.

[0022] Furthermore, the blade body has a closed cooling channel inside, which has a coolant inlet and a coolant outlet, used to circulate coolant to remove heat during high-speed cutting.

[0023] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the built-in cooling channel provides an active cooling method for the cutting blade. During long-term, high-speed continuous cutting operations, friction generates a large amount of heat, leading to a decline in blade performance or even permanent damage. By circulating coolant, this heat can be forcibly carried away, keeping the blade at a suitable working temperature, thereby ensuring its performance and lifespan under extreme working conditions.

[0024] Furthermore, the blade body is made of cemented carbide or cobalt-based high-speed steel to ensure that the blade body has sufficient hardness and toughness to meet the requirements of long-term, high-intensity cutting operations.

[0025] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: using high-performance materials such as cemented carbide or cobalt-based high-speed steel as the base material of the blade body is the foundation for ensuring the overall performance of the cutting blade. These materials themselves possess excellent red hardness, wear resistance, and sufficient impact toughness, enabling them to withstand high-intensity cutting loads and friction, ensuring that the blade body can maintain effective use for a long time even after the coating wears off.

[0026] Compared with existing technologies, the beneficial effects of the corrugated paper cutting knife for carton production provided by this utility model are as follows: This corrugated paper cutting knife for carton production, by adopting a double-cutting-edge structure and optimizing the angle of the second cutting edge, enables the cutting process to be completed by scraping, significantly reducing the generation of paper dust and burrs from the source, resulting in a smooth and even cutting edge. Combined with the chip removal groove design, it effectively avoids paper dust accumulation. Furthermore, by selecting high-performance materials, adding a wear-resistant coating, reinforcing ribs, and a shock-absorbing structure, the durability, stability, and service life of the knife are greatly improved, reducing replacement frequency and equipment downtime. For special working conditions, internal cooling and a micro-serrated structure can also be used to address these issues, comprehensively improving the quality, efficiency, and economy of corrugated paper cutting. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 for;

[0029] The attached diagram lists the components represented by each number as follows:

[0030] 1. Tool body; 2. Cutting edge; 21. First cutting edge; 22. Second cutting edge; 3. Chip removal groove; 4. Mounting hole; 5. Reinforcing rib. Detailed Implementation

[0031] 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.

[0032] like Figure 1 The image shows a first embodiment of a corrugated paper cutting knife for carton production provided by this utility model. In this embodiment, it includes a knife body 1, a blade 2 for cutting corrugated paper, and a mounting hole 4 for fixing the knife body to a cutting device. The blade includes a first cutting edge 21 and a second cutting edge 22 connected in sequence. The first cutting edge is used for initial cutting of the corrugated paper, and the second cutting edge is used for final cutting of the corrugated paper. A chip discharge groove 3 is provided on at least one side of the knife body for discharging paper scraps generated during the cutting process. A groove is provided on the side wall of the knife body to reduce resistance during cutting and reduce tool wear.

[0033] In the above technical solution, the angle between the cutting edge of the second cutting edge and the side of the blade body is greater than the angle between the cutting edge of the first cutting edge and the side of the blade body, so that the second cutting edge plays a scraping role during cutting to reduce paper dust.

[0034] Furthermore, in the above technical solution, the chip removal groove is an arc-shaped groove extending along the blade direction. The chip removal groove is set on the side of the blade body adjacent to the second cutting edge, and is used to smoothly discharge the paper chips generated by the second cutting edge.

[0035] Furthermore, in the above technical solution, a reinforcing rib 5 is integrally formed on the blade body. The reinforcing rib is located on the side of the blade body away from the blade edge, which is used to improve the structural rigidity and vibration resistance of the blade body when subjected to cutting force.

[0036] Furthermore, in the above technical solution, a wear-resistant coating is applied to the surface of the blade. The wear-resistant coating is used to reduce the cutting friction coefficient and improve the hardness and service life of the blade.

[0037] Furthermore, the above technical solution also includes a tool holder for mounting the blade body. The blade body is detachably connected to the tool holder by fastening bolts passing through mounting holes thereon. The tool holder is used to fix the cutting blade as a whole to the production equipment.

[0038] Furthermore, in the above technical solution, a shock-absorbing pad is provided between the contact surface of the blade body and the blade holder. The shock-absorbing pad is made of elastic material and is used to absorb the high-frequency vibration generated during the cutting process.

[0039] Furthermore, in the above technical solution, the first cutting edge is provided with a continuously arranged micro-serration structure. The micro-serration structure is used to increase the biting force on the corrugated paper surface in the initial stage of cutting to prevent slippage.

[0040] Furthermore, in the above technical solution, a closed cooling channel is provided inside the blade body. The cooling channel has a coolant inlet and a coolant outlet, which is used to circulate coolant to remove heat under high-speed cutting conditions.

[0041] Furthermore, in the above technical solution, the blade body is made of cemented carbide or cobalt-based high-speed steel to ensure that the blade body has sufficient hardness and toughness to meet the requirements of long-term, high-intensity cutting operations.

[0042] Specifically, the principle of this invention is as follows: The core principle of this solution lies in decomposing the single cutting process into two stages. The first cutting edge easily cuts into the surface of the corrugated paper with a small cutting angle, serving to position and initially separate the fibers, requiring relatively little cutting force. The second cutting edge, which follows closely behind, has a larger cutting angle. Its main function is not to split, but to cleanly scrape and shear the fibers that the first cutting edge failed to completely cut. This "cut-scrape" combination mode, compared to the violent chopping or tearing of traditional single-edge cutting, can separate paper fibers with less force and in a smoother manner, resulting in a neat cut and a significant reduction in dust particles. The chip removal groove utilizes the principle of fluid dynamics to provide a low-resistance discharge channel for these small amounts of paper chips. The reinforcing ribs, high-performance materials, wear-resistant coatings, and vibration-damping pads provide a guarantee for the stable realization of the above-mentioned core cutting principle from multiple dimensions such as mechanical strength, materials science, and vibration control, ensuring that the tool can work reliably for a long time in high-speed, high-intensity industrial production environments.

Claims

1. A corrugated paper cutting knife for carton production, comprising a knife body, a knife edge for cutting corrugated paper and a mounting hole for fixing the knife body to a cutting device, characterized in that, The blade includes a first cutting edge and a second cutting edge connected in sequence; the first cutting edge is used for initial cutting of corrugated paper, and the second cutting edge is used for final cutting of corrugated paper; a chip discharge groove is provided on at least one side of the blade body for discharging paper scraps generated during the cutting process; a groove is provided on the side wall of the blade body to reduce resistance during cutting and reduce tool wear.

2. The corrugated paper cutting knife for carton production according to claim 1, characterized in that, The angle between the cutting edge forming the second cutting edge and the side of the blade body is greater than the angle between the cutting edge forming the first cutting edge and the side of the blade body, so that the second cutting edge plays a scraping role during cutting to reduce paper dust.

3. The corrugated paper cutting knife for carton production according to claim 2, characterized in that, The chip removal groove is an arc-shaped groove extending along the blade direction. The chip removal groove is disposed on the side of the blade body adjacent to the second cutting edge, and is used to smoothly discharge the paper chips generated by the second cutting edge.

4. The corrugated paper cutting knife for carton production according to claim 3, characterized in that, The blade body is also integrally formed with reinforcing ribs, which are located on the side of the blade body away from the cutting edge, and are used to improve the structural rigidity and vibration resistance of the blade body when subjected to cutting force.

5. The corrugated paper cutting knife for carton production according to claim 4, characterized in that, A wear-resistant coating is applied to the surface of the blade to reduce the coefficient of friction during cutting and to increase the hardness and service life of the blade.

6. The corrugated paper cutting knife for carton production according to claim 5, characterized in that, It also includes a blade holder for mounting the blade body, the blade body being detachably connected to the blade holder by fastening bolts passing through mounting holes thereon, the blade holder being used to fix the cutting blade as a whole to the production equipment.

7. The corrugated paper cutting knife for a carton production according to claim 6, characterized by, A shock-absorbing pad is provided between the contact surfaces of the blade body and the blade holder. The shock-absorbing pad is made of elastic material and is used to absorb high-frequency vibrations generated during the cutting process.

8. The corrugated paper cutting knife for carton production according to claim 7, characterized in that, The first cutting edge is provided with a continuously arranged micro-serration structure. The micro-serration structure is used to increase the biting force on the corrugated paper surface in the initial stage of cutting to prevent slippage.

9. The corrugated paper cutting knife for a carton production according to claim 8, characterized by, The blade body has a closed cooling channel inside, which has a coolant inlet and a coolant outlet, used to circulate coolant to remove heat during high-speed cutting.

10. The corrugated paper cutting knife for a carton production according to claim 9, characterized by, The blade body is made of cemented carbide or cobalt-based high-speed steel to ensure that it has sufficient hardness and toughness to meet the requirements of long-term, high-intensity cutting operations.

Images