Efficient waste paper crushing blade

Abstract

The utility model provides an efficient waste paper crushing blade, and belongs to the technical field of industrial cutters. According to the structure, the upper portion of a blade body is fan-shaped, the lower portion of the blade body is rectangular, the front side, the middle portion and the rear side of the top end of the blade body are respectively provided with a blade tooth, a concave tooth root portion is arranged between every two adjacent blade teeth, the front ends of the three blade teeth are respectively provided with a first front angle, a second front angle and a third front angle, and the back portion of the blade tooth located on the front side is provided with a tooth back. The tooth back portion located on the rear side is provided with a tooth back protruding portion. The waste paper crushing and breaking device is suitable for crushing and breaking waste paper in the waste paper dry-method manufacturing process, and the function of efficiently and rapidly crushing the waste paper is achieved. Based on the self structure, various waste paper can be effectively crushed, and the production efficiency is improved; moreover, the blade can be produced by directly cutting a plate through laser, the hardness of the blade also meets the requirement of processing waste paper, and the material cost of the blade is low.

Description

Technical Field

[0001] This utility model relates to the field of industrial cutting tool technology, specifically a high-efficiency waste paper shredder blade. Background Technology

[0002] Traditional crusher blades are mostly rectangular. Rectangular blades are easy to manufacture and rely on the potential energy of rotation to strike the raw material during operation. Therefore, the advantage of rectangular blades is that they are more effective at crushing blocky materials with a certain degree of hardness, such as feed pellets and wood blocks. This also places certain requirements on the hardness of the blade itself. Currently, these blades are usually made of medium carbon steel. To increase their wear resistance, a tungsten carbide wear-resistant layer is usually welded onto the surface to extend their service life. This results in a relatively high material cost.

[0003] Currently, most waste paper shredding on the market still uses the aforementioned rectangular blades. However, for waste paper shredding, due to the low hardness of the raw material and the presence of coatings on its surface, rectangular blades cannot fully utilize their advantages, and their efficiency and capacity do not meet customer needs. Summary of the Invention

[0004] The first technical problem that this invention aims to solve is that conventional rectangular blades are inefficient at shredding waste paper.

[0005] The second technical problem that this invention aims to solve is that conventional blades have high material costs.

[0006] To achieve the above technical objectives, the present invention adopts the following technical solution:

[0007] A high-efficiency waste paper shredder blade includes a blade body with mounting holes. The upper part of the blade body is fan-shaped and the lower part is rectangular. It also includes teeth, tooth roots, a first front angle, a second front angle, a third front angle, a tooth back, and a tooth back protrusion. Each tooth has a tooth on the front, middle, and rear sides of the top of the blade body. There is a concave tooth root between adjacent teeth. The front ends of the three teeth have a first front angle, a second front angle, and a third front angle, respectively. The back of the tooth on the front side has a tooth back, and the back of the tooth on the rear side has a tooth back protrusion.

[0008] Preferably, the first front angle is 25°~35°, and the tail width of the first front angle is 12~14mm.

[0009] Preferably, the second front angle is 55°~65°.

[0010] Preferably, the third anterior angle is 55°~65°.

[0011] Preferably, the hardness of the waste paper shredder blade is between HRC54 and HRC58.

[0012] Preferably, the thickness of the waste paper shredder blade is 8~12mm.

[0013] Preferably, the included angle between the front and rear sides of the fan shape is 35°~45°.

[0014] Preferably, the front side of the sector forms a 166° angle with the front side of the rectangle, and the rear side of the sector forms a 160° angle with the rear side of the rectangle.

[0015] Preferably, the base length of the rectangle is 50mm.

[0016] Preferably, the tooth height of the cutting tooth is 1.8 to 2.2 times its tooth width.

[0017] This invention relates to a high-efficiency and durable blade specifically designed for waste paper. The blade's first front angle is sharp, with a tip angle between 25-35° and a tail width of 12-14mm. This ensures both sharpness and strength of the front angle. When the blade tip contacts the waste paper, the front angle quickly penetrates the paper, damaging the surface layer, especially common coated paper and fruit bag paper on the market. Due to the thin plastic film on their surface, conventional rectangular blades struggle to break down this film, resulting in poor shredding and low efficiency. Because the first front angle of this blade is sharp, the contact area with the waste paper is small, allowing for immediate damage to the plastic film. The second and third sharp angles of the blade are approximately 60°, ensuring that after the first front angle penetrates the paper surface, the damage point created by the first sharp angle is quickly and effectively widened, further guaranteeing the shredding effect. Even after all the blade teeth have worn down, the rotor can be flipped, utilizing the protrusion on the back of the last blade tooth to continue shredding the waste paper. Furthermore, this specialized blade is designed with a serrated shape at the point of contact with waste paper. Multiple serrations can individually interact with the waste paper, improving work efficiency. It also reduces excessive friction and pulverization of the waste paper, resulting in more uniform waste paper production.

[0018] Secondly, the blades are made of a material with an overall hardness of HRC54-HRC58, whose hardness and toughness meet the requirements for waste paper shredding. This makes them easy to process and cost-effective.

[0019] The blade thickness is between 8-12mm, which reduces the contact area between the blade and the paper, resulting in excellent energy consumption control.

[0020] The blade has a fan-shaped tip and a rectangular root. The angle between the root and the bottom is between 35 and 40 degrees, with a rounded transition corner in the middle to prevent stress concentration.

[0021] The overall hardness of the knife is between HRC54 and HRC58, which ensures both hardness and toughness, meeting production needs.

[0022] The blade tip, in contact with the waste paper, is designed with a toothed shape, typically three teeth. The first front angle is located at the very front of the fan-shaped blade, with the tooth tip pointing forward. The middle and rear teeth align with the front teeth, and the teeth are spaced a certain distance apart, approximately equal to the width of the tooth. The root of each tooth is rounded, and the back of the tooth is also rounded, with the rounded back and root rounded by a straight line. The back of the last tooth is a prominent sharp angle. All the aforementioned teeth are as follows... Figures 1-3 The sharp angle shown is used to reduce the contact area with the paper surface, allowing the potential energy of the entire rotating blade to act on the paper surface through the blade tip, thereby quickly changing the shape of the paper and ensuring that the waste paper is shredded.

[0023] The tooth tips are arranged in the direction of blade movement. The tooth height is generally about twice the tooth width.

[0024] The other end of the blade has a round hole for mounting the blade on the rotor's cutter shaft.

[0025] During operation, a high-speed rotating rotor driven by a motor causes the blades to move in a circular motion, rapidly impacting the waste paper and dispersing and breaking it up. After the first blade wears down, subsequent blades take over, continuing to disperse and break up the waste paper until all blades are worn. At the end, the rotor can be flipped, utilizing the protrusion on the back of the last blade to continue breaking up the waste paper. This design significantly improves blade utilization and work efficiency.

[0026] This invention is applicable to the dry processing of waste paper, enabling it to be crushed and dispersed, achieving efficient and rapid shredding of waste paper. As a highly efficient and durable blade specifically designed for waste paper shredding, this invention, based on its own structure, can effectively shred various types of waste paper, improving production efficiency; moreover, this blade can be directly manufactured using laser cutting of sheet metal, and its hardness meets the requirements for processing waste paper, resulting in low material costs. Attached Figure Description

[0027] Figure 1 This is the front view of this utility model;

[0028] Figure 2 This is the first perspective view of this utility model;

[0029] Figure 3 This is the second perspective view of this utility model;

[0030] Figure 4 This is the first usage state diagram of this utility model;

[0031] Figure 5 This is the second usage state diagram of this utility model;

[0032] In the picture:

[0033] Detailed Implementation

[0034] The specific embodiments of this utility model will be described in detail below. To avoid excessive and unnecessary details, well-known structures or functions will not be described in detail in the following embodiments. The approximate language used in the following embodiments can be used for quantitative descriptions, indicating that a certain degree of variation in quantity is permissible without changing the basic function. Unless otherwise defined, the technical and scientific terms used in the following embodiments have the same meaning as commonly understood by those skilled in the art to which this utility model pertains.

[0035] Example 1

[0036] A high-efficiency waste paper shredder blade, such as Figures 1-3 As shown, the blade body 1 includes a mounting hole 2. The upper part of the blade body 1 is fan-shaped and the lower part is rectangular. It also includes a tooth 3, a tooth root 4, a first rake angle 5, a second rake angle 6, a third rake angle 7, a tooth back 8, and a tooth back protrusion 9. The blade body 1 has a tooth 3 on the front, middle, and rear sides of the top end. There is a concave tooth root 4 between adjacent teeth 3. The front ends of the three teeth 3 have a first rake angle 5, a second rake angle 6, and a third rake angle 7, respectively. The back of the tooth 3 on the front side has a tooth back 8, and the back of the tooth 3 on the rear side has a tooth back protrusion 9.

[0037] Example 2

[0038] A high-efficiency waste paper shredder blade, such as Figures 1-3As shown, the blade includes a blade body 1 with mounting holes 2. The upper part of the blade body 1 is fan-shaped and the lower part is rectangular. It also includes blade teeth 3, tooth roots 4, a first rake angle 5, a second rake angle 6, a third rake angle 7, a tooth back 8, and a tooth back protrusion 9. Each blade body 1 has one blade tooth 3 on its front, middle, and rear sides at the top. A concave tooth root 4 is located between adjacent blade teeth 3. The front ends of the three blade teeth 3 have a first rake angle 5, a second rake angle 6, and a third rake angle 7, respectively. The back of the front blade tooth 3 has a tooth back 8, and the back of the rear blade tooth 3 has a tooth back protrusion 9. The first rake angle 5 is 25°~35°, and the tail width of the first rake angle 5 is 12~14mm. The second rake angle 6 is 55°~65°. The third rake angle 7 is 55°~65°. The hardness of this waste paper shredding blade is between HRC54 and HRC58. The thickness of the waste paper shredder blade is 8-12mm. The included angle between the front and rear sides of the fan-shaped blade is 35°-45°. The front side of the fan-shaped blade forms a 166° angle with the front side of the rectangle, and the rear side of the fan-shaped blade forms a 160° angle with the rear side of the rectangle. The base length of the rectangle is 50mm. The tooth height of the blade tooth 3 is 1.8-2.2 times its tooth width.

[0039] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and is not intended to limit this utility model. Any modifications, equivalent substitutions, and improvements made within the scope of this utility model application should be included within the protection scope of this utility model.

Claims

1. A high-efficiency waste paper shredder blade, comprising a blade body (1) having mounting holes (2) on the blade body (1); characterized in that, The upper part of the blade body (1) is fan-shaped and the lower part is rectangular. It also includes a tooth (3), a tooth root (4), a first front angle (5), a second front angle (6), a third front angle (7), a tooth back (8), and a tooth back protrusion (9). There is a tooth (3) on the front, middle and rear sides of the top of the blade body (1). There is a concave tooth root (4) between adjacent teeth (3). The front ends of the three teeth (3) are respectively equipped with a first front angle (5), a second front angle (6) and a third front angle (7). There is a tooth back (8) on the back of the tooth (3) located on the front side and a tooth back protrusion (9) on the back of the tooth (3) located on the rear side.

2. The high-efficiency waste paper shredder blade according to claim 1, characterized in that, The first front angle (5) is 25°~35°, and the tail width of the first front angle (5) is 12~14mm.

3. The high-efficiency waste paper shredder blade according to claim 1, characterized in that, The second front angle (6) is 55°~65°.

4. The high-efficiency waste paper shredder blade according to claim 1, characterized in that, The third front angle (7) is 55°~65°.

5. The high-efficiency waste paper shredder blade according to claim 1, characterized in that, The hardness of this waste paper shredder blade is between HRC54 and HRC58.

6. The high-efficiency waste paper shredder blade according to claim 1, characterized in that, The thickness of the waste paper shredder blade is 8~12mm.

7. The high-efficiency waste paper shredder blade according to claim 1, characterized in that, The included angle between the front and rear sides of the fan-shaped structure is 35°~45°.

8. The high-efficiency waste paper shredder blade according to claim 1, characterized in that, The front side of the sector forms a 166° angle with the front side of the rectangle, and the rear side of the sector forms a 160° angle with the rear side of the rectangle.

9. The high-efficiency waste paper shredder blade according to claim 1, characterized in that, The base length of the rectangle is 50mm.

10. A high-efficiency waste paper shredder blade according to claim 1, characterized in that, The tooth height of the cutting tooth (3) is 1.8 to 2.2 times its tooth width.

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