Arc steel cutting die

Abstract

The utility model discloses an arc steel cutting die, and belongs to the technical field of rotary cutting dies. A notch is formed in the circular knife cylinder, a datum plane is arranged on one side in the notch, an inclined plane is arranged on the other side in the notch, a die-cutting knife set is arranged in the notch and comprises a knife and a pressing block, the side face of one side of the knife is tightly matched with the datum plane, and the pressing block is arranged between the knife and the inclined plane. The pressing block is fixedly connected with the circular cutter cylinder through a fastener, and the two sides of the pressing block can tightly press the cutter and the inclined face. According to the utility model, the notch on the circular cutter cylinder is processed by machinery equipment, the notch precision is high, the high-precision die cutting processing can be finished by adopting a low-cost finished cutter on the market, the finished cutter is convenient to purchase, only the finished cutter needs to be replaced after the cutter is abraded, and the production cost, the use cost and the maintenance cost are reduced. The die cutting machine is mainly used for die cutting of corrugated cartons and paper boxes.

Description

Technical Field

[0001] This utility model belongs to the field of circular die-cutting technology, and more specifically, it relates to a circular arc steel die-cutting mold. Background Technology

[0002] Rotary die-cutting is a die-cutting technology widely used in the packaging and printing industries. It is mainly used to process a variety of products such as self-adhesive labels, trademarks, corrugated boxes, and cartons.

[0003] The commonly used rotary die-cutting molds are as follows:

[0004] The first type is a relatively simple arc-shaped wooden board die, which is often used in the corrugated cardboard box processing industry. Its die is an arc-shaped wooden board with grooves cut into it, and cutting blades and creasing blades are installed in the grooves. The disadvantage is that the die-cutting accuracy is not high.

[0005] The second type is the integral fixed circular cutter, which is an engraving circular cutter made of high-quality mold steel and manufactured using a computer-controlled four-axis high-precision machine tool. This involves directly engraving the cutting edge and pressure lines onto the roller surface. The advantages are high processing accuracy, with a cutter precision of up to 0.01mm and a minimum clearance of 0.3mm. It is widely used in die-cutting electronic adhesive products, self-adhesive labels, and printed packaging materials. The disadvantages are high production costs, long production cycles, and the need to replace the entire circular cutter after the cutting edge wears or is damaged, resulting in high operating costs.

[0006] The third type is the insert-type circular die cutter, such as the patent with publication number CN213890277U. This type features a die-cutting edge engraved on a die block made of high-quality powder metallurgy material ASP-23. The die block is mounted on a reusable shaft, ensuring both cutting quality and lifespan. When the die edge wears or is damaged, only the die block needs to be replaced. The advantage is convenient tool maintenance and reduced repair costs. The disadvantage is the high cost of the powder metallurgy die block, requiring re-engraving after each replacement, resulting in high production costs and hindering widespread adoption. Therefore, this structure is mostly used in large-scale die-cutting equipment in the printing industry for producing high-value-added die-cut products such as paper cups, cigarette packs, and medicine packets, and is not easily adopted in low-value-added industries like corrugated cardboard boxes. Utility Model Content

[0007] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a circular arc steel die, wherein the groove on the circular die barrel is processed by machine equipment, the groove has high precision, and high precision die cutting can be completed by using inexpensive finished cutters on the market. Moreover, finished cutters are easy to purchase, and when the cutter is worn, only the finished cutter needs to be replaced, thereby reducing production costs, usage costs and maintenance costs.

[0008] The aforementioned arc steel die includes a circular die cylinder with a slot. A reference surface is provided on one side of the slot, and an inclined surface is provided on the other side of the slot. A die-cutting blade assembly is provided in the slot, including a blade and a pressure block. One side of the blade is tightly fitted with the reference surface. The pressure block is positioned between the blade and the inclined surface and is fixedly connected to the circular die cylinder by fasteners. Both sides of the pressure block can press the blade and the inclined surface together.

[0009] Preferably, the inclined plane forms an angle α with the reference plane, and the angle α is 10-45°.

[0010] Preferably, the cross-section in the width direction of the slot is a right-angled trapezoidal structure, with the reference plane and the inclined plane being the waist of the right-angled trapezoidal structure, and the reference plane being the axial cross-section of the circular cutter barrel.

[0011] Preferably, the cross-section of the pressure block is a right-angled trapezoidal structure, and the side of the pressure block near the inclined surface is provided with an inclination that matches the inclined surface, and the height of the pressure block is less than the depth of the groove.

[0012] Preferably, the side of the pressure block closest to the inclined plane has the same slope as the inclined plane.

[0013] Preferably, the circular knife cylinder has an assembly hole one that communicates with the slot, and the pressure block has an assembly hole two that corresponds to the assembly hole one.

[0014] Preferably, the circular cutter barrel is made of steel plate.

[0015] Preferably, the cutting tool is a blade or a pressure line.

[0016] Preferably, it further includes a die-cutting base roller, which is sleeved in the central hole of the circular cutter cylinder. The die-cutting base roller and the circular cutter cylinder are coaxially arranged, and the circular cutter cylinder and the die-cutting base roller are fixedly connected.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. In the manufacturing process of this utility model, the groove on the circular cutter barrel is processed by machine equipment, and the groove has high precision. This enables high-precision die-cutting processing to be completed using inexpensive pre-made cutters available on the market. Moreover, pre-made cutters are easy to purchase, and when the cutter wears out, only the pre-made cutter needs to be replaced, which reduces production costs and saves on usage and maintenance costs.

[0019] 2. The die-cutting blade assembly uses a beveled pressure block to engage with the slot and the blade. When the pressure block is tightened, it moves downward and gradually makes an interference fit with the slot and the blade, thereby clamping the blade and enhancing its stability. This makes the blade more firmly fixed in the slot during operation. At the same time, if the blade edge is worn or damaged, the pressure block can be quickly loosened by the fasteners, allowing the blade to be removed and replaced with a new one, making it more convenient to use.

[0020] 3. The circular cutter cylinder is installed on the die-cutting base roller. When changing the product to be processed, simply remove the circular cutter cylinder from the die-cutting base roller and replace it with a new one. This saves changeover time and improves processing efficiency. Attached Figure Description

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

[0022] Figure 2 This is the front view of the present invention;

[0023] Figure 3 This is a schematic diagram of the side structure of the circular cutter barrel;

[0024] Figure 4 This is a schematic diagram of the cross-section of the groove in the circular cutter barrel;

[0025] Figure 5 This is a schematic diagram of the assembly of the slot and the die-cutting blade assembly.

[0026] In the figure, 1 is the die-cutting base roller; 2 is the circular knife cylinder; 201 is the assembly hole one; 3 is the slot; 301 is the reference surface; 302 is the inclined surface; 4 is the die-cutting knife set; 401 is the knife; 402 is the pressure block; 403 is the assembly hole two; and 404 is the fastener. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings:

[0028] The directional terms used in the detailed description paragraphs are only for the convenience of those skilled in the art to understand the technical solutions described in this application based on the visual orientation shown in the accompanying drawings. Unless otherwise expressly specified and limited, the terms "setting," "installation," "connection," etc., should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] Example 1:

[0030] like Figures 1 to 5 As shown, the arc steel die is mainly used for die-cutting of corrugated cardboard boxes. It includes a circular die cylinder 2, which is made of steel plate rolled into a cylindrical structure. This structure has good strength and durability and can withstand the pressure and friction required in the die-cutting process, ensuring the stability and reliability of the die-cutting die set 4 in long-term use.

[0031] A slot 3 is provided on the circular cutter barrel 2. The slot 3 can be machined using existing machines according to the requirements of the actual product, and the slot 3 can be made into any shape. The slot 3 is used to install the die-cutting blade assembly 4 and ensure the firmness of the die-cutting blade assembly 4. Specifically, the cross-section of the slot 3 in the width direction is a right-angled trapezoidal structure. The upper base of the right-angled trapezoid is set near the center of the circular cutter barrel 2. That is, a reference surface 301 is provided on one side of the slot 3, and an inclined surface 302 is provided on the other side of the slot 3. The reference surface 301 and the inclined surface 302 are the legs of the right-angled trapezoidal structure, and the reference surface 301 is preferably the axial section of the circular cutter barrel 2. The inclined surface 302 and the reference surface 301 form an angle α, which is controlled within the range of 10-45°. Through this specific angle setting, the structure inside the slot 3 can better adapt to the installation and working requirements of the die-cutting blade assembly 4.

[0032] like Figure 5 As shown, a die-cutting blade assembly 4 is provided within the slot 3. The die-cutting blade assembly 4 is the core component of the arc-shaped steel die-cutting mold, enabling die-cutting. The die-cutting blade assembly 4 includes a blade 401 and a pressure block 402. Depending on the die-cutting requirements, the blade 401 can be a commonly used blade for cutting corrugated cartons; or it can be a commonly used crease line (without a cutting edge) for processing creases and folds on cartons. One side of the blade 401 is tightly fitted with the reference surface 301. This tight fit ensures the positional accuracy of the blade 401 during the die-cutting process, preventing wobbling or offset, thus guaranteeing the quality and precision of the die-cutting.

[0033] A pressure block 402 is positioned between the cutter 401 and the inclined surface 302. Its cross-section is a right-angled trapezoid, with the upper base of the trapezoid corresponding to the upper base of the groove 3. One side of the pressure block 402 has an angle that matches the inclined surface 302; preferably, the angle of the side of the pressure block 402 is the same as that of the inclined surface 302. The other side of the pressure block 402 is in contact with the side of the cutter 401, and the height of the pressure block 402 is less than the depth of the groove 3. During installation, the pressure block 402 is fixedly connected to the circular cutter cylinder 2 by fasteners 404. As the fasteners 404 are tightened, the pressure block 402 descends, gradually achieving an interference fit with the inclined surface 302 and the cutter 401. This interference fit further enhances the stability of the cutter 401, making it more firmly fixed within the groove 3 during operation.

[0034] By clamping the cutter 401 and the inclined surface 302 on both sides of the pressure block 402, the pressure block 402 can effectively fix the cutter 401 in a suitable position and keep the cutter 401 stable during the die-cutting process. After the blade of the cutter 401 is worn or damaged, the pressure block 402 can be quickly loosened by the fastener 404, so as to facilitate the removal of the cutter 401 and the replacement with a new cutter 401.

[0035] To facilitate the installation and fixing of the pressure block 402, the circular cutter cylinder 2 has an assembly hole 201 communicating with the slot 3, and the pressure block 402 has an assembly hole 403 corresponding to the assembly hole 201. The assembly holes 201 and 403 are threaded holes. By installing fasteners 404, preferably screws, in these two corresponding assembly holes, the pressure block 402 can be quickly and easily fixed on the circular cutter cylinder 2, improving the assembly efficiency and convenience of the die-cutting mold.

[0036] Example 2:

[0037] The aforementioned arc-shaped steel die also includes a die-cutting base roller 1, which is fitted inside the central hole of the circular die cylinder 2. The die-cutting base roller 1 and the circular die cylinder 2 are coaxially arranged, and the circular die cylinder 2 and the die-cutting base roller 1 are fixedly connected. The die-cutting base roller 1 provides stable support and a rotation axis for the circular die cylinder 2, ensuring that the circular die cylinder 2 can rotate smoothly and accurately during the die-cutting process, thereby achieving precise die-cutting of corrugated cardboard boxes; otherwise, it is the same as in Embodiment 1.

[0038] When changing the product to be processed, simply remove the circular cutter barrel 2 and replace it with a new one, saving changeover time.

[0039] In the manufacturing process of this utility model, the groove 3 is processed by machine equipment, resulting in high groove precision. At the same time, it can be matched with inexpensive cutting tools available on the market to complete high-precision die-cutting processing.

[0040] During installation, the finished cutting tool 401 is placed close to the reference surface 301, and then the inclined pressure block 402 is placed into the slot 3. The pressure block 402 is fixed to the round cutting tool cylinder 2 with fasteners 404. As the thread pressure increases, the inclined pressure block 402 descends. The inclined surface on the pressure block 402 cooperates with the inclined surface 302 on the slot 3 to press the cutting tool 401 tightly into the slot 3, thereby completing the installation of the cutting tool 401.

[0041] When changing the product to be processed, simply remove the circular cutter cylinder 2 from the die-cutting base roller 1 and replace it with a new circular cutter cylinder 2, saving changeover time.

[0042] Finally, although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A circular arc steel die, comprising a circular die cylinder (2), characterized in that: The circular cutter tube (2) has a slot (3) with a reference surface (301) on one side and an inclined surface (302) on the other side. The slot (3) has a die-cutting knife assembly (4) with a cutter (401) and a pressure block (402). The side of the cutter (401) is in close contact with the reference surface (301). The pressure block (402) is located between the cutter (401) and the inclined surface (302). The pressure block (402) is fixedly connected to the circular cutter tube (2) by fasteners (404), and the two sides of the pressure block (402) can press the cutter (401) and the inclined surface (302).

2. The arc-shaped steel die according to claim 1, characterized in that: The inclined plane (302) forms an angle α with the reference plane (301), and the angle α is 10-45°.

3. The arc-shaped steel die according to claim 1, characterized in that: The cross-section of the slot (3) in the width direction is a right trapezoidal structure. The reference surface (301) and the inclined surface (302) are the waist of the right trapezoidal structure. The reference surface (301) is the axial section of the circular cutter barrel (2).

4. The arc-shaped steel die according to claim 3, characterized in that: The cross section of the pressure block (402) is a right-angled trapezoidal structure, and the side of the pressure block (402) near the inclined surface (302) is provided with an inclination that matches the inclined surface (302). The height of the pressure block (402) is less than the depth of the groove (3).

5. The arc-shaped steel die according to claim 4, characterized in that: The side of the pressure block (402) closest to the inclined plane (302) has the same slope as the inclined plane (302).

6. The arc-shaped steel die according to claim 4, characterized in that: The circular cutter tube (2) has an assembly hole 1 (201) that communicates with the slot (3), and the pressure block (402) has an assembly hole 2 (403) that corresponds to the assembly hole 1 (201).

7. The arc-shaped steel die according to claim 1, characterized in that: The circular cutter barrel (2) is made of steel plate.

8. The arc-shaped steel die according to claim 1, characterized in that: The cutting tool (401) is a blade or a pressure line.

9. The arc-shaped steel die according to any one of claims 1 to 8, characterized in that: It also includes a die-cutting base roller (1), which is sleeved in the center hole of the circular knife cylinder (2). The die-cutting base roller (1) and the circular knife cylinder (2) are coaxially arranged, and the circular knife cylinder (2) and the die-cutting base roller (1) are fixedly connected.

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