Upper knife and lower knife structure for cutting single piece

Abstract

The utility model relates to an upper cutter and lower cutter structure for cutting a single sheet, which belongs to the technical field of digital printing machines and comprises an upper cutter component and a lower cutter component, the upper cutter component moves up and down along a machine body, the lower cutter component is connected with the machine body and is matched with the upper cutter component, and an angle is formed between the upper cutter component and the lower cutter component. According to the paper cutting device, the upper cutter assembly is made to conduct progressive continuous cutting along the lower cutter assembly, paper cutting is completed through cooperation of the upper cutter assembly and the lower cutter assembly and up-and-down reciprocating motion of the upper cutter assembly, meanwhile, an angle is formed between the upper cutter assembly and the lower cutter assembly, the upper cutter assembly conducts progressive continuous cutting along the lower cutter assembly, and the cutting load is reduced through the angle; the paper cutting device solves the problems that due to the negative load of the paper, the phenomenon of non-uniformity at the cutting position is easily caused, when the high-quality paper printed by the digital printing machine is cut, the phenomenon of non-uniformity at the cutting position can cause that the cut paper cannot be used, and finally waste is caused, and the cutting quality is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of digital printing machines, and in particular relates to an upper knife and a lower knife structure for cutting a single sheet. Background Art

[0002] Paper cutters are traditional products used to handle the paper cutting needs of digital printing machines in the later stages. They have evolved from mechanical paper cutters to tape-controlled paper cutters, and then to microcomputer-controlled, color display, full-image operation-guided visual processing, and computer-aided cutting systems with external programming and editing of production data, making production preparation time shorter, cutting more accurate, labor-intensive, and safer to operate.

[0003] The upper and lower knives of the current paper cutter for cutting single sheets are usually fixed on the body of the paper cutter, and the upper knife set up tilted repeatedly moves up and down to cut the paper. However, the upper and lower knife structures of the current paper cutter for cutting single sheets are easy to cause uneven cutting due to the load of the paper when cutting a single sheet. When cutting high-quality paper printed by a digital printing machine, the uneven cutting will make the cut paper unusable, resulting in waste. In this regard, an upper and lower knife structure that can cut single sheets with high precision is proposed. Utility Model Content

[0004] The utility model provides an upper knife and a lower knife structure for cutting single sheets, which solves the problem that the upper knife and the lower knife structure in the prior art, when cutting single sheets, due to the load of the paper, it is easy to cause discontinuity in the cutting position. When cutting high-quality paper printed by a digital printing machine, the discontinuity in the cutting position will make the cut paper unusable, resulting in waste.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a single-sheet cutting upper and lower knife structure, including an upper knife assembly moving up and down along a machine body and a lower knife assembly connected to the machine body, the upper knife assembly cooperates with the lower knife assembly, and an angle is formed between the upper knife assembly and the lower knife assembly, so that the upper knife assembly can cut progressively and continuously along the lower knife assembly.

[0006] Preferably, the upper knife assembly comprises an upper knife blade and an upper knife edge provided on the upper knife blade, and the upper knife edge is obliquely arranged on the upper knife blade.

[0007] Preferably, the inclination angle of the blade of the upper knife blade is 25° to 35°.

[0008] Preferably, the lower knife assembly comprises a lower knife blade and a lower cutting edge provided on the lower knife blade, and an angle of 0.25° is formed between the lower knife blade and the upper knife blade.

[0009] Preferably, flat grooves are provided on both sides of the upper knife blade, and protrusions matching with the flat grooves are provided on the machine body.

[0010] Preferably, the upper blade is detachably connected to the machine body via a limiting member.

[0011] Preferably, a clamping block is provided on the lower blade, a clamping slot is provided on the machine body, and the clamping block is engaged and connected with the clamping slot.

[0012] The beneficial effects of the utility model are:

[0013] The upper knife assembly cooperates with the lower knife assembly, at which time the upper knife assembly is connected to the machine body, and the lower knife assembly is fixedly connected to the machine body. The paper cutting is completed by the up and down reciprocating movement of the upper knife assembly. At the same time, an angle is formed between the upper knife assembly and the lower knife assembly, so that the upper knife assembly can cut progressively and continuously along the lower knife assembly. This angle is used to reduce the cutting load, and solves the problem of uneven cutting due to the load of the paper. When cutting high-quality paper printed by a digital printing machine, uneven cutting will make the cut paper unusable, ultimately causing waste, thereby improving the cutting quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 A schematic diagram of the angle between the upper blade and the lower blade of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the upper knife assembly of the utility model;

[0018] Figure 4 It is a schematic diagram of the structure of the lower knife assembly of the utility model.

[0019] Description of main component symbols:

[0020] In the figure: 1. upper knife assembly; 11. upper knife blade; 12. upper knife edge; 2. lower knife assembly; 21. lower knife blade; 22. lower knife edge; 3. flat groove. DETAILED DESCRIPTION

[0021] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0022] See also Figure 1-4 , a single-sheet cutting upper and lower knife structure, including an upper knife assembly 1 that moves up and down along a machine body and a lower knife assembly 2 connected to the machine body, the upper knife assembly 1 cooperates with the lower knife assembly 2, the blade of the upper knife assembly 1 here is inclined, because the inclination here can reduce the cutting load, and the upper knife assembly 1 and the lower knife assembly 2 form an angle, so that the upper knife assembly 1 can cut progressively and continuously along the lower knife assembly 2, and the upper knife assembly 1 and the lower knife assembly 2 here form two inclinations front and back, which can better reduce the cutting load, make the cutting continuous and uniform, and avoid waste.

[0023] Paper cutters are traditional products used to handle the paper cutting needs of digital printing machines in the later stage. The upper and lower knives of current paper cutters for cutting single sheets, whether electric or manual, are usually fixed on the body of the paper cutter, and the upper knife set at an angle moves up and down repeatedly to complete the paper cutting. However, the structure of the upper and lower knives of current paper cutters for cutting single sheets can easily lead to uneven cutting due to the load of the paper when cutting single sheets. When cutting high-quality paper printed by a digital printing machine, uneven cutting will make the cut paper unusable, resulting in waste.

[0024] In order to solve the above problems, in this embodiment, the upper knife assembly 1 is matched with the lower knife assembly 2. At this time, the upper knife assembly 1 is connected to the machine body, and the lower knife assembly 2 is fixedly connected to the machine body. The upper knife assembly 1 is moved up and down to complete the paper cutting. At the same time, an angle is formed between the upper knife assembly 1 and the lower knife assembly 2, so that the upper knife assembly 1 is progressively and continuously cut along the lower knife assembly 2. This angle is used to reduce the cutting load, and solves the problem that the uneven cutting position is easily caused by the load of the paper. When cutting high-quality paper printed by a digital printing machine, the uneven cutting position will make the cut paper unusable, which will eventually cause waste and improve the cutting quality.

[0025] In order to enable the upper knife assembly 1 to move up and down repeatedly to cut paper better, and also to ensure that the cutting of ordinary paper can be completed relatively evenly, in one embodiment, the upper knife assembly 1 includes an upper knife blade 11 and an upper blade 12 provided on the upper knife blade 11, and the upper blade 12 is obliquely arranged on the upper knife blade 11. By obliquely arranging the upper blade 12 on the upper knife blade 11, the cutting load can be reduced, so that continuous and even cutting can be achieved when cutting ordinary paper.

[0026] Because the upper knife blade 11 needs to be used repeatedly when cutting paper, in order to avoid the passivation of the upper knife blade 11, in one embodiment, the blade inclination angle of the upper knife blade 11 is 25°~35°. In fact, the blade inclination angle of the upper knife blade 11 should be determined according to the paper to be cut. For thin, loose and soft paper, the blade angle is small, generally 25~30°. For thick, solid and hard paper, the blade inclination angle of the upper knife blade 11 is generally 30~35°. Otherwise, the upper and lower knife phenomena are prone to occur, and the blade passivation is accelerated. The blade inclination angle of the upper knife blade 11 provided here is 25°~35°, and it can be specifically determined according to actual needs that 25~30° or 30~35° is adopted, and the upper knife blade 11 with blade inclination angles of 25°, 30° and 35° can be selected by the user.

[0027] It is worth mentioning that only relying on the inclination of the blade of the upper knife blade 11 can only reduce part of the load during cutting. However, when high-quality cutting is performed on the paper printed by the digital printing press, the original cutting method cannot meet the high-quality requirements. Uneven cutting is prone to occur, which will cause the cut paper to be unusable, resulting in waste. In order to solve this problem, in one embodiment, the lower knife assembly 2 includes a lower knife blade 21 and a lower blade 22 provided on the lower knife blade 21. The lower knife blade 21 and the upper knife blade 11 form an angle of 0.25°. The angle design of 0.25° here is designed by the present application according to the paper faced by the digital printing press. The angle of 0.25° can be adapted to high-quality paper under normal circumstances. By forming an angle of 0.25° between the lower knife blade 21 and the upper knife blade 11, the cutting load can be better reduced, and the cutting can be continuous and uniform to avoid waste.

[0028] In addition, when the upper knife blade 11 moves up and down, due to multiple movements and various factors such as vibration, the upper knife blade 11 will inevitably tilt. Once tilted, it will cause damage to the blade or poor quality of cut paper. In order to solve this problem, in one embodiment, flat grooves 3 are provided on both sides of the upper knife blade 11, and a protrusion matching the flat grooves 3 is provided on the machine body. Through the cooperation between the flat grooves 3 and the protrusions, when the upper knife blade 11 moves, the protrusion is actually stationary, and the flat grooves 3 on both sides of the upper knife blade 11 move up and down, and the protrusions move relatively in the flat grooves 3, thereby preventing the upper knife blade 11 from tilting. In addition, in order to facilitate replacement or maintenance of the upper knife blade 11, the upper knife blade 11 and the machine body are detachably connected through a limit member, and the limit member here can be a bolt.

[0029] Although the lower blade 21 does not move when cutting paper, after cutting paper for a long time, the lower blade 21 will also be worn to a certain extent and needs regular maintenance or replacement. Therefore, in order to facilitate the replacement of the lower blade 21, in one embodiment, a card block is provided on the lower blade 21, and a card slot is provided on the machine body, and the card block is connected with the card slot. The structure here is not seen in the figure because the card block on the lower blade 21 is smaller and located at the bottom, and is blocked by the lower blade 21. However, according to the description here, it is easy to know how the card block set on the lower blade 21 is connected to the card slot on the machine body.

[0030] The working principle and use process of this utility model:

[0031] When in use, the upper knife blade 11 is repeatedly moved up and down, cooperating with the lower knife blade 21 fixed on the machine body, so as to complete the cutting of paper. At the same time, the upper knife assembly 1 and the lower knife assembly 2 form an angle, so that the upper knife assembly 1 can cut continuously along the lower knife assembly 2. The upper knife assembly 1 and the lower knife assembly 2 form two inclinations front and back, which can better reduce the cutting load, make the cutting continuous and uniform, and avoid waste.

[0032] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A structure for cutting upper and lower knives for single sheets, characterized in that: It includes an upper knife assembly moving up and down along the machine body and a lower knife assembly connected to the machine body. The upper knife assembly cooperates with the lower knife assembly and forms an angle between the upper knife assembly and the lower knife assembly so that the upper knife assembly can cut continuously along the lower knife assembly.

2. The upper and lower blade structures for cutting single sheets according to claim 1, characterized in that: The upper knife assembly comprises an upper knife blade and an upper knife edge arranged on the upper knife blade, and the upper knife edge is arranged obliquely on the upper knife blade.

3. The upper and lower blade structures for cutting single sheets according to claim 2, characterized in that: The inclination angle of the blade of the upper knife blade is 25° to 35°.

4. The upper and lower blade structures for cutting single sheets according to claim 1, characterized in that: The lower knife assembly comprises a lower knife blade and a lower knife edge arranged on the lower knife blade, and an angle of 0.25° is formed between the lower knife blade and the upper knife blade.

5. The upper and lower blade structures for cutting single sheets according to claim 2, characterized in that: Flat grooves are arranged on both sides of the upper knife blade, and protrusions matching with the flat grooves are arranged on the machine body.

6. The upper and lower blade structures for cutting single sheets according to claim 2, characterized in that: The upper blade is detachably connected to the machine body via a limiting member.

7. The upper and lower blade structures for cutting single sheets according to claim 4, characterized in that: The lower blade is provided with a clamping block, the machine body is provided with a clamping slot, and the clamping block is clamped and connected with the clamping slot.

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