An edge tearing tool for a paper sheet

Abstract

The utility model discloses a paper sheet edge tearing cutter for solving the problem of high labor intensity and low efficiency caused by manual waste edge removal in die cutting process. The cutter comprises a connecting rod, the two ends of which are connected with a handle and a cutter head respectively, the outer peripheral edge of the cutter head is configured as a cutting edge, the cutting edge has a blade angle inclined surface of 25-45 DEG and an arc-shaped smooth transition at the end. The preferred scheme includes: a weight reduction hole is arranged in the middle of the cutting edge to reduce the weight; the handle is a T-shaped handle with a curved surface holding part, and an anti-slip pattern is arranged on the surface; the connecting rod is detachably connected with the cutter head through a crank and double bolts, and the surface of the cutter head is adapted with a counterbore to ensure the stability.

Description

Technical Field

[0001] This utility model relates to the technical field of paper product manufacturing equipment, specifically to a paper sheet tearing edge cutter. Background Technology

[0002] In the modern packaging printing and paper product processing industry, die-cutting, as a core technology for achieving precise forming, is widely used in the production of various irregularly shaped labels, greeting cards, puzzles, and cardboard packaging. By using specially designed steel die-cutting molds to crimp and cut paper, it is possible to efficiently produce target graphics with complex contours. However, because actual production requires balancing material positioning stability and processing reliability, tiny adhesion structures, commonly known as "connecting points" or "rough edges," are usually set between the target graphic and the surrounding waste area. This is to prevent the target graphic from shifting or warping due to mechanical vibration during the cutting process, ensuring the smooth implementation of the die-cutting process.

[0003] While existing technologies can improve accuracy by adjusting the tool angle or adding positioning pins, manual processing is still required to remove the waste edges between adjacent shapes when handling irregular shapes, long and thin structures, or densely arranged patterns. This results in high labor intensity and low production efficiency. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a paper sheet tearing tool.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0006] A paper sheet tearing tool includes a connecting rod, with a handle and a blade head respectively provided at both ends of the connecting rod. The outer peripheral edge of the blade head is configured as a cutting edge, and the cutting edge has a cutting angle bevel of 25°-45°. The end of the cutting angle bevel away from the connecting rod has an arc-shaped smooth transition.

[0007] As a preferred technical solution, the blade is an annular structure with a weight-reducing hole in the middle.

[0008] As a preferred technical solution, the handle is a T-shaped handle, and the connecting rod is vertically connected to the middle section of the T-shaped handle.

[0009] As a preferred technical solution, the T-shaped handle is provided with a curved grip portion adapted to the fingers.

[0010] As a preferred technical solution, the surface of the curved grip portion is provided with anti-slip texture.

[0011] As a preferred technical solution, the connecting rod is constructed as a prism, and the T-shaped handle is provided with a polygonal blind hole adapted to the prism, and the prism is welded into the polygonal blind hole.

[0012] As a preferred technical solution, the connecting rod is connected to the cutter head via a crank located on the rear side of the cutter head, and bolts are provided passing through the cutter head and the crank in sequence.

[0013] As a preferred technical solution, the surface of the cutting head is provided with a countersunk hole adapted to the bolt.

[0014] As a preferred technical solution, two bolts are provided along the axial direction of the connecting rod.

[0015] As a preferred technical solution, the side edge of the T-shaped handle is located on the side of the plane containing the radial direction of the cutter head, closer to the crank.

[0016] The advantages and beneficial effects of this utility model are as follows:

[0017] The blade is directly applied to remove waste edges after die-cutting, replacing traditional manual operation. It can stack multiple identical die-cut paper sheets and cut off the waste edges of about 20-30 paper sheets at once from top to bottom. The back-and-forth movement can achieve the function of fast edge cutting.

[0018] The blade is designed with a 25°-45° bevel angle, and the bevel angle has a smooth arc transition. This reduces cutting resistance and increases tearing speed, thereby shortening the production cycle.

[0019] The handle features a T-shaped design, with the connecting rod vertically connected to the middle section of the T-shaped handle. The curved grip enhances grip comfort and prevents slippage during operation.

[0020] The cutter head and connecting rod are connected via a crank, allowing the operator to precisely control the cutting angle and force, making it suitable for tearing edges of complex patterns. The side edge of the T-handle is located on the side of the plane where the cutter head is radial, closer to the crank, enabling continuous operation of paper sheets stacked at a height of at least 1 meter without noticeable jamming. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] Figure label:

[0023] 1-Connecting rod, 2-T-shaped handle, 3-Cut head, 4-Cut blade, 5-Curved grip, 6-Pyramid, 7-Crank, 8-Bolt, 9-Counterhole. Detailed Implementation

[0024] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, it should be noted that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, not the entire structure. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0025] The terms “comprising” and “having”, and any variations thereof, used in this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0026] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly or implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0027] Please refer to the appendix for the present invention. Figure 1 This paper sheet tearing cutter mainly consists of a connecting rod 1, a T-shaped handle 2, and a cutter head 3. The connecting rod 1 adopts a prism structure 6, with one end vertically fixed to a polygonal blind hole in the center of the T-shaped handle 2 via welding, ensuring stable force transmission; the other end is connected to the cutter head 3 via a crank 7 located on the rear side of the cutter head 3. The outer periphery of the cutter head 3 is constructed as a blade 4, designed with a 25°-45° bevel angle and a smooth, rounded end to reduce cutting resistance and prevent uneven paper tearing. To reduce overall weight and improve maneuverability, a weight-reducing hole is provided in the center of the blade 4, forming a ring structure. The T-shaped handle 2 is designed with a curved grip 5 adapted to the fingers, with a surface covered with anti-slip texture to enhance comfort and anti-slip properties during operation. The detachable connection between the connecting rod 1 and the cutter head 3 is achieved through double bolts 8, which are arranged axially along the connecting rod, passing sequentially through the cutter head 3 and the crank 7, and have matching countersunk holes 9 on the surface of the cutter head 3, ensuring a secure connection and easy maintenance. The side edge of the T-handle 2 is located on the side of the plane where the cutter head is radial, closer to the crank. This layout allows the cutter to work continuously on paper sheets stacked up to 1 meter high without jamming.

[0028] In practical applications, this tool replaces manual edge-tearing in the die-cutting process. During use, the operator holds the curved grip 5 of the T-handle 2 and places the blade head 3 into the waste edge area of ​​the die-cut paper sheet. Applying downward pressure through the handle, the beveled edge and curved end of the blade 4 easily cut into the paper, reducing cutting resistance. The operator then moves back and forth along the waste edge trajectory to cut away the waste edge of 20-30 stacked paper sheets at once. This process is suitable for edge-tearing tasks involving complex patterns such as irregularly shaped labels, puzzles, or long, thin strips. The connecting rod 1 and the blade head 3 are connected via a crank 7, allowing the operator to precisely adjust the cutting angle and force, for example, fine-tuning the blade head direction to avoid damaging the target graphic when dealing with densely packed patterns. After edge-tearing, the blade head 3 can be cleaned or replaced by removing the bolt 8, making maintenance simple.

[0029] The working principle of this tool is as follows: First, the 25°-45° cutting angle design of the blade 4, combined with a smooth arc transition, significantly reduces cutting resistance, increasing tearing speed compared to manual operation and shortening the production cycle. Second, the curved grip 5 and anti-slip texture design of the T-shaped handle 2 reduce hand fatigue during long-term operation, improving operating comfort and safety. Furthermore, the weight-reducing hole design makes the blade head 3 lightweight, facilitating rapid movement, while the cooperation of the double bolts 8 and countersunk holes 9 ensures structural stability under high loads. In terms of application scenarios, the tool is not only suitable for standard die-cutting paper products such as greeting cards and cardboard packaging, but also for handling irregular shapes or high-density materials. For example, in packaging and printing plants, operators can stack multiple sheets of paper and complete the tearing in one go, greatly reducing manual intervention. Compared with traditional methods, this tool significantly reduces labor intensity while maintaining tearing accuracy and avoiding defective products caused by waste edges.

[0030] It should be noted that during use, the side of the crank 7 is located on the waste side, and the other side of the crank 7 is on the same side as the target material to be cut. Therefore, when facing a high stack of paper sheets, the T-handle 2 or bolt 8 will not rub against the material that has already been torn, leaving working space.

[0031] In routine maintenance, users need to periodically check the wear of the blade edge 4, and the bevel can be repaired by grinding. Lubricant should be applied to the connection between bolt 8 and countersunk hole 9 to prevent corrosion and ensure smooth disassembly. Extended applications of the tool include customizing different sized blade heads 3 to adapt to various die-cutting molds. For example, a smaller blade angle can be used when processing ultra-thin paper, while increasing the number of bolts strengthens the connection in thick cardboard applications. Overall, this paper sheet tearing tool, through structural optimization and modular design, solves the pain points of high labor intensity and low efficiency in traditional tearing processes, making it suitable for mass production environments in industries such as packaging and printing.

[0032] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A paper sheet tearing blade, characterized in that, It includes a connecting rod (1), with a handle and a blade (3) respectively provided at both ends of the connecting rod (1). The outer peripheral edge of the blade (3) is constructed into a blade (4), and the blade (4) has a blade angle slope of 25°-45°. The end of the blade angle slope away from the connecting rod (1) has an arc-shaped smooth transition.

2. The paper sheet tearing tool according to claim 1, characterized in that, The blade (4) is an annular structure with a weight-reducing hole in the middle.

3. The paper sheet tearing tool according to claim 1, characterized in that, The handle is a T-shaped handle (2), and the connecting rod (1) is vertically connected to the middle section of the T-shaped handle (2).

4. The paper sheet tearing tool according to claim 3, characterized in that, The T-shaped handle (2) is provided with a curved grip portion (5) adapted to the fingers.

5. The paper sheet tearing tool according to claim 4, characterized in that, The surface of the curved grip part (5) is provided with anti-slip texture.

6. The paper sheet tearing tool according to claim 3, characterized in that, The connecting rod (1) is constructed as a prism (6), and the T-shaped handle (2) is provided with a polygonal blind hole adapted to the prism (6), and the prism (6) is welded into the polygonal blind hole.

7. The paper sheet tearing tool according to claim 1, characterized in that, The connecting rod (1) is connected to the cutter head (3) by a crank (7) located on the rear side of the cutter head (3), and bolts (8) are provided passing through the cutter head (3) and the crank (7) in sequence.

8. The paper sheet tearing tool according to claim 7, characterized in that, The surface of the cutting head (3) is provided with a countersunk hole (9) adapted to the bolt (8).

9. The paper sheet tearing tool according to claim 7, characterized in that, Two bolts (8) are provided along the axial direction of the connecting rod (1).

10. The paper sheet tearing tool according to claim 3, characterized in that, The edge of the side of the T-shaped handle (2) is located on the side of the plane where the cutter head (3) is radially located, close to the crank (7).

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