A knife die structure for preventing knife sticking

Abstract

The utility model relates to a knife die related technical field especially, relates to a kind of knife die structure of anti-sticking knife, including round cutter, air intake component is rotatably sleeved in the outer periphery of round cutter, the surface of round cutter is equipped with multiple air outlet grooves, the inner side of round cutter is equipped with two groups of spiral flow guide rib, the inside of air intake component is equipped with air passage, the inner ring of air intake component is equipped with two groups of annular clamping groove, the inside of air outlet groove is equipped with air equalizing cover, the inside of annular clamping groove is embedded with elastic sealing ring, multiple air equalizing holes are formed in air equalizing cover.The utility model is inelastic nest by the elasticity of elastic sealing ring, cooperate annular clamping groove and round cutter annular protrusion to realize axial and radial limit, simplify structure while intensifying gas path sealing property, then by spiral flow guide rib forced airflow circumferential motion, porous air equalizing cover cooperation air equalizing hole secondary dispersion, finally form planar uniform air film on the surface of blade, substantially reduce sticking phenomenon.

Description

Technical Field

[0001] This utility model relates to the technical field of die-cutting molds, and in particular to a die-cutting mold structure that prevents the die from sticking. Background Technology

[0002] In many industrial production fields, cutting is a key process. As a common cutting tool, the circular cutter has always faced the problem of blade sticking during operation, which has been a major challenge affecting production efficiency, product quality, and equipment stability. Therefore, a blade die structure that prevents blade sticking is particularly needed.

[0003] A circular die-cutting machine with anti-sticking function, authorized by announcement number CN222003686U, includes a frame, a mounting bracket fixedly mounted on the frame, a circular cutter rotatably mounted on the mounting bracket, an air inlet mechanism rotatably mounted on the circular cutter, a quick-connect air inlet fixedly mounted on the air inlet mechanism, and a venting groove formed on the air inlet mechanism; an air-containing cavity formed on the circular cutter, and multiple venting holes formed on the air-containing cavity; a blade fixedly mounted on the circular cutter, and multiple air outlets formed on the air-containing cavity. By adding a high-pressure air source to the circular cutter and blowing air on both sides of the cutter, the cut film is blown away by the air blowing, preventing the film from sticking to the cutter and causing product misalignment on the production line. This utility model has the advantage of good product production quality. However, in the above-mentioned device, the air intake mechanism and the circular cutter are prone to gaps due to vibration and uneven force, which affects the stability of airflow and causes the airflow to be concentrated and discharged, resulting in uneven airflow on both sides of the blade.

[0004] To address the aforementioned issues, a die-cutting structure that prevents the die from sticking to the die is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a die-cutting structure for preventing knife sticking, thereby solving the problem of the existing die-cutting structures for preventing knife sticking mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a die-cutting structure for preventing sticking, comprising a circular cutter, an air intake assembly rotatably sleeved on the outer circumference of the circular cutter, multiple sets of air outlet grooves formed on the surface of the circular cutter, two sets of spiral guide ribs provided on the inner side of the circular cutter, an air vent groove formed inside the air intake assembly, two sets of annular slots formed on the inner ring of the air intake assembly, an air distribution hood installed inside the air outlet groove, an elastic sealing ring embedded inside the annular slot, and multiple air distribution holes formed on the air distribution hood.

[0007] Preferably, the circular cutter is provided with a blade, which is adapted to the surface of the circular cutter for material cutting operations.

[0008] Preferably, the air intake assembly is provided with a quick-connect air intake port, which is connected to the ventilation slot for quickly connecting to an air source and delivering gas into the air intake assembly.

[0009] Preferably, a thrust bearing is provided between the air intake assembly and the circular cutter. The thrust bearing is used to support the rotation of the circular cutter and at the same time ensure the airtightness of the relative rotation between the air intake assembly and the circular cutter.

[0010] Preferably, the intake assembly is provided with a shaft end retaining ring at its end, which cooperates with a clamping block to limit the assembly position of the intake assembly and the circular cutter, and prevent relative axial movement.

[0011] Preferably, the circular cutter is installed and positioned by a support rod, and the circular cutter is provided with an air cavity and a vent hole, which cooperate with the air inlet assembly and the air outlet groove to form an air passage.

[0012] Preferably, a sealing block is provided on the inner side of the circular cutter. The sealing block is adapted to the spiral guide rib and the inner wall of the circular cutter to separate the cavity, ensure the air passage sealing, and assist the airflow to flow in a directional manner along the spiral guide rib.

[0013] Preferably, the circular cutter is provided with a counterweight, which is adapted to the rotational center of gravity of the circular cutter to balance the rotational inertia of the circular cutter and improve rotational stability.

[0014] Compared with the prior art, the beneficial effects of this utility model are: 1. Compared with traditional thrust bearings and simple sealing structures, the elastic nesting of the elastic sealing ring achieves axial and radial limiting through annular grooves and circular cutter annular protrusions, replacing some functions of the thrust bearing. While simplifying the structure, it enhances the air circuit sealing performance and reduces the risk of air leakage caused by structural redundancy. 2. The air pressure is stabilized by the elastic nested seal, and the airflow is forced to move in a circular motion by the spiral guide rib. The multi-hole air distribution cover and air distribution holes disperse the air for a second time, and finally a uniform air film is formed on the blade surface. This can effectively isolate the material from the blade, greatly reduce the sticking phenomenon, and allow the material to be smoothly removed after cutting, thus improving the product yield. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 This is a schematic diagram of the air intake assembly of this utility model; Figure 4This is a schematic diagram of the structure of the gas equalization hood of this utility model; Figure 5 This utility model Figure 4 A magnified structural diagram of point A in the middle.

[0016] In the diagram: 1. Circular cutter; 2. Air inlet assembly; 3. Air outlet groove; 4. Spiral guide rib; 5. Ventilation groove; 6. Annular groove; 7. Air distribution cover; 8. Elastic sealing ring; 9. Air distribution hole; 10. Blade; 11. Quick-connect air inlet; 12. Thrust bearing; 13. Shaft end retaining ring; 14. Clamping block; 15. Support rod; 16. Air chamber; 17. Ventilation hole; 18. Sealing block; 19. Counterweight. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0018] Example like Figure 1 , 2 As shown in Figures 4 and 5, the device includes a circular cutter 1, an air intake assembly 2 rotatably mounted on the outer circumference of the circular cutter 1, multiple sets of air outlet grooves 3 on the surface of the circular cutter 1, two sets of spiral guide ribs 4 on the inner side of the circular cutter 1, an air vent 5 inside the air intake assembly 2, two sets of annular grooves 6 on the inner ring of the air intake assembly 2, an air distribution hood 7 installed inside the air outlet grooves 3, an elastic sealing ring 8 embedded inside the annular grooves 6, multiple air distribution holes 9 on the air distribution hood 7, and a blade 10 on the circular cutter 1. The blade 10 is adapted to the surface of the circular cutter 1 for material cutting operations. The air intake assembly 2 is equipped with a fast... The air inlet 11 is connected to the ventilation groove 5. A thrust bearing 12 is provided between the air intake assembly 2 and the circular cutter 1. The end of the air intake assembly 2 is provided with a shaft end retaining ring 13, which is matched with the abutment block 14. The circular cutter 1 is installed and positioned by the support rod 15. The circular cutter 1 is provided with an air chamber 16 and a ventilation hole 17, which cooperate with the air intake assembly 2 and the air outlet groove 3 to form an air passage. The inner side of the circular cutter 1 is provided with a sealing block 18, which is matched with the spiral guide rib 4 and the inner wall of the circular cutter 1. The circular cutter 1 is provided with a counterweight 19, which is matched with the rotation center of gravity of the circular cutter 1.

[0019] It should be noted that in this embodiment, an external air source is connected through the quick-connect air inlet 11 on the air intake assembly 2. The gas enters the ventilation groove 5 inside the air intake assembly 2 through the quick-connect air inlet 11, providing a basis for subsequent airflow distribution. The air-containing cavity 16 and ventilation hole 17 inside the circular cutter 1 cooperate with the ventilation groove 5 of the air intake assembly 2 and the air outlet groove 3 on the surface of the circular cutter 1 to construct a complete air path, allowing the gas to flow directionally within the system. The gas entering the inside of the circular cutter 1 flows along a set path under the guidance of two sets of spiral guide ribs 4. At the same time, the sealing block 18 cooperates to separate the cavity, ensuring that the airflow is directionally transmitted along the spiral guide ribs 4, avoiding leakage and confusion. After the airflow reaches the air outlet groove 3, it is evenly dispersed and sprayed out through multiple air distribution holes 9 on the internal air distribution cover 7, making the airflow coverage more comprehensive and providing stable and uniform air source support for the anti-sticking function. The airflow sprayed out from the air distribution holes 9 acts on the circular cutter 1. A gas isolation layer is formed on the surface and cutting area to reduce the adhesion between the material and the die, making it easier for the cut material to detach from the die, thus improving cutting quality and efficiency. The blade 10 on the circular cutter 1 rotates with the circular cutter 1 to cut the material. The counterweight 19 balances the rotational inertia of the circular cutter 1, the thrust bearing 12 supports the rotation and ensures airtightness, and the shaft end retaining ring 13 and the clamping block 14 limit the movement and prevent slippage, together ensuring the stable and smooth rotation of the circular cutter 1.

[0020] like Figure 3 As shown, the quick-connect air inlet 11 is located on the side of the air intake assembly 2 and has a tubular interface structure. One end is quickly connected to the external air source pipeline, and the other end is connected to the ventilation groove 5 inside the air intake assembly 2. The air intake assembly 2 is an annular sleeve and is one of the fixed base components of the device. The inner ring rotates with the outer circumference of the circular cutter 1. The internal ventilation groove 5 and annular slot 6 are integrated and serve as the carrier for air distribution and sealing structure. It not only undertakes the function of airflow transfer, but also achieves dynamic sealing through cooperation with the elastic sealing ring 8 and the circular cutter 1. The ventilation groove 5 is opened inside the air intake assembly 2 and is an annular groove or channel. One end is connected to the quick-connect air inlet 11, and the other end delivers gas to the air chamber 16 or ventilation hole 17 of the circular cutter 1 through the gap between the air intake assembly 2 and the circular cutter 1. It serves as a temporary storage and distribution channel for airflow in the air intake assembly 2. Its annular design can ensure that the airflow is evenly distributed along the circumference.

[0021] It should be noted that in this embodiment, the annular groove 6 is formed on the inner ring of the intake assembly 2, and has an annular groove structure, providing a precise installation position for the elastic sealing ring 8. The elastic sealing ring 8 is made of shape memory alloy wire braided skeleton and is tightly embedded in the annular groove 6. Through the circumferential limiting effect of the annular groove 6, it is ensured that the sealing ring will not be displaced or fall off with the relative rotation of the circular cutter 1 and the intake assembly 2. The outer diameter of the elastic sealing ring 8 is slightly larger than the groove depth of the annular groove 6. When the circular cutter 1 and the intake assembly 2 are assembled, the elastic sealing ring 8 is in close contact with the outer circumferential surface of the circular cutter 1. Utilizing the elastic deformation of the sealing ring itself, its surface will adhere to the rotating contact surface of the circular cutter 1, forming a circumferential sealing strip, blocking the channel for gas leakage from the gap between the two in the air passage.

[0022] Working principle of this utility model: Refer to the instruction manual appendix Figure 1-5 External gas enters through the air intake component 2 channel. Due to the combination of the annular groove 6 and the outer circumferential protrusion nesting structure of the circular cutter 1 with the elastic sealing ring 8, gas leakage is prevented. When the circular cutter 1 rotates, the displacement caused by vibration and uneven force is absorbed by the elastic sealing ring 8 and continuously maintains the air passage seal between the air intake component 2 and the circular cutter 1, ensuring ventilation stability. After the airflow enters the air chamber 16, it is forcibly guided by the spiral guide rib 4 and moves in a circular spiral motion along the cavity wall, breaking the concentrated path of the direct outlet and realizing the uniform distribution of airflow in the air chamber 16. The spirally dispersed airflow is cut into multiple fine airflows as it passes through the porous air distribution shroud 7. Finally, it is discharged from the air distribution holes 9 in a uniform, planar spray pattern, ensuring that the air pressure and flow rate are consistent on both sides of the blade 10. The uniformly sprayed airflow forms a gas isolation film on the surface of the blade 10, physically preventing the material from contacting the blade 10, avoiding adhesion after cutting, and ensuring that the material can be smoothly removed.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A die-cutting structure for preventing sticking, comprising a circular cutter (1), characterized in that: The circular cutter (1) is rotatably fitted with an air intake assembly (2). The surface of the circular cutter (1) has multiple sets of air outlet grooves (3). The inner side of the circular cutter (1) is provided with two sets of spiral guide ribs (4). The air intake assembly (2) has an air passage groove (5) inside. The inner ring of the air intake assembly (2) has two sets of annular slots (6). The air outlet groove (3) is equipped with an air equalization hood (7). The annular slot (6) is embedded with an elastic sealing ring (8). The air equalization hood (7) has multiple air equalization holes (9).

2. The die-cutting structure for preventing sticking to the blade according to claim 1, characterized in that: The circular cutter (1) is provided with a blade (10), which is adapted to the surface of the circular cutter (1) for material cutting operations.

3. The die-cutting structure for preventing blade sticking according to claim 1, characterized in that: The air intake assembly (2) is provided with a quick-connect air intake port (11), which is connected to the ventilation slot (5) for quickly connecting to the air source and delivering gas into the air intake assembly (2).

4. The die-cutting structure for preventing sticking to the blade according to claim 1, characterized in that: A thrust bearing (12) is provided between the air intake assembly (2) and the circular cutter (1). The thrust bearing (12) is used to support the rotation of the circular cutter (1) and at the same time ensure the airtightness of the relative rotation between the air intake assembly (2) and the circular cutter (1).

5. The die-cutting structure for preventing sticking to the blade according to claim 1, characterized in that: The intake assembly (2) is provided with a shaft end retaining ring (13) at the end. The shaft end retaining ring (13) cooperates with the abutment block (14) to limit the assembly position of the intake assembly (2) and the circular cutter (1) to prevent relative axial movement.

6. The die-cutting structure for preventing sticking to the blade according to claim 1, characterized in that: The circular cutter (1) is installed and positioned by a support rod (15). The circular cutter (1) has an air chamber (16) and a vent (17) inside, which cooperate with the air intake assembly (2) and the air outlet groove (3) to form an air passage.

7. The die-cutting structure for preventing sticking to the blade according to claim 1, characterized in that: The inner side of the circular cutter (1) is provided with a sealing block (18). The sealing block (18) is adapted to the spiral guide rib (4) and the inner wall of the circular cutter (1) to separate the cavity, ensure the air passage sealing, and assist the airflow to flow in a directional manner along the spiral guide rib (4).

8. The die-cutting structure for preventing sticking to the blade according to claim 1, characterized in that: The circular cutter (1) is equipped with a counterweight (19), which is adapted to the rotation center of gravity of the circular cutter (1) to balance the rotational inertia of the circular cutter (1) and improve rotational stability.

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