A die cutting cylinder which can be pressure compensated

Abstract

This utility model discloses a pressure-compensated die-cutting roller, comprising: a roller body, a die-cutting plate mounted on the surface of the roller body, a piezoelectric sensor mounted on the outer side of the die-cutting plate, a central shaft mounted in the middle of the interior of the roller body, a connecting frame fixedly connected to the surface of the central shaft, a base fixedly mounted on the surface of the connecting frame, and a movable seat slidably mounted at the front end of the connecting frame, a hydraulic cylinder mounted between the movable seat and the base, and a pusher fixedly connected to the front end of the movable seat; the piezoelectric sensor mounted on the die-cutting plate on the surface of the roller body is used for pressure sensing. When material passes through the gap between the rollers, the piezoelectric sensor detects the local pressure value. If the pressure in a certain area is lower than a set value, the hydraulic cylinder immediately injects compensating oil pressure, thereby pushing the pusher to move and restore the pressure in that area to the standard value, reducing the scrap rate and extending the die life.

Description

Technical Field

[0001] This utility model relates to the field of die-cutting machine technology, specifically a die-cutting roller capable of pressure compensation. Background Technology

[0002] Die-cutting machines, also known as cutting machines, are post-printing equipment used in paper and plastic packaging and printing. They mainly apply pressure to the printed material through an impression plate, creating scratches that separate the finished product from the waste material. Traditional die-cutting machines consist of a machine body, a paper feeding device, a die-cutting device, and a paper output device arranged sequentially along the machine body. The die-cutting device is a plate-shaped pressing die that can be raised and lowered along the machine body.

[0003] The existing publication CN210758171U discloses a die-cutting mechanism with a pressure regulating device, which monitors the position and status of the die-cutting roller and can then be adjusted. To achieve the above objective, this utility model provides the following technical solution: A die-cutting mechanism with a pressure regulating device, comprising a die-cutting roller, characterized in that: a pressure regulating device is provided axially above the die-cutting roller, the roller contacts the die-cutting roller, and the pressure reading is displayed on a pressure gauge through a pressure sensor, thereby achieving monitoring, and then adjustment is made according to the actual situation.

[0004] The die-cutting machine is equipped with two sets of rollers, which are arranged opposite each other. Pressure die-cutting is achieved by the extrusion force between the two sets of rollers. However, when the pressure is insufficient, the rollers need to be adjusted. The existing method of adjusting the pressure of the die-cutting rollers uses an external pressure component. The external pressure component is pushed forward to reduce the distance between itself and the roller, thereby increasing the pressure. However, the installation of the external pressure component will occupy the usable space around the roller, resulting in a larger die-cutting machine. In addition, the setting of the pressure component will also obstruct the operating view of the roller and cause obstruction during maintenance and inspection.

[0005] Therefore, those skilled in the art have provided a pressure-compensated die-cutting roller to solve the problems mentioned in the background art. Utility Model Content

[0006] The purpose of this invention is to provide a pressure-compensated die-cutting roller to solve the problem mentioned in the background art that when the existing die-cutting roller is pressure-compensated by an external pressure component, the roller's operating view is obstructed, and the internal space of the die-cutting machine is occupied.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A pressure-compensated die-cutting roller includes: a roller body, a die-cutting plate mounted on the surface of the roller body, a piezoelectric sensor mounted on the outer side of the die-cutting plate, a central shaft mounted in the middle of the interior of the roller body, a connecting frame fixedly connected to the surface of the central shaft, a base fixedly mounted on the surface of the connecting frame, and a movable seat slidably mounted at the front end of the connecting frame, a hydraulic cylinder installed between the movable seat and the base, and a push seat fixedly connected to the front end of the movable seat.

[0009] As a further improvement of this utility model: a polyurethane buffer plate is integrally installed on the outer wall of the die-cutting plate, and a die-cutting blade is installed on the surface of the polyurethane buffer plate.

[0010] As a further embodiment of this utility model: the connecting frame is fixedly connected to the central shaft, and the connecting frame is distributed in a ring about the symmetrical center line of the central shaft.

[0011] As a further improvement of this utility model: the connecting frame and the base are fixedly connected, and the connecting frame and the movable seat are slidably connected.

[0012] As a further embodiment of this utility model: a folding rod is rotatably connected between the movable seat and the base, and the middle and both ends of the surface of the folding rod are provided with shaft parts for rotatable connection.

[0013] As a further improvement of this utility model: a connecting spring is provided on the inner side of the folding rod, and the folding rod is distributed in a ring about the symmetrical center line of the connecting frame.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. A piezoelectric sensor is installed on the die-cutting plate on the surface of the roller body. The piezoelectric sensor is used to sense pressure. When the material passes through the gap between the rollers, the piezoelectric sensor detects the local pressure value. If the pressure in a certain area is lower than the set value, the hydraulic cylinder immediately injects compensation oil pressure, which in turn pushes the pusher seat to move, so that the pressure in that area is restored to the standard value, reducing the scrap rate and extending the die life.

[0016] 2. Each set of die-cutting plates corresponds to a set of connecting frames. The hydraulic cylinder will push the movable seat to move outward along the connecting frame. The movable seat and the fixed seat are connected by a folding rod. The hydraulic cylinder pushes the movable seat and pushes the push seat connected to the movable seat outward. When the corresponding die-cutting plate needs pressure compensation, the push seat is pushed outward, thereby compensating the pressure of the die-cutting plate. Pressure compensation is performed from inside the roller, reducing the space occupied by external pressure components on the die-cutting machine. It will not block the space of the roller body, making it convenient for subsequent inspection and maintenance of the roller. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a pressure-compensated die-cutting roller.

[0018] Figure 2 This is a schematic diagram of the central shaft of a pressure-compensated die-cutting roller.

[0019] Figure 3 This is a schematic diagram of the connecting frame in a pressure-compensated die-cutting roller.

[0020] Figure 4 This is a schematic diagram of the structure of a die-cutting plate in a pressure-compensated die-cutting roller.

[0021] In the diagram: 1. Roller body; 2. Die-cutting plate; 3. Piezoelectric sensor; 4. Central shaft; 5. Connecting frame; 6. Base; 7. Folding rod; 8. Hydraulic cylinder; 9. Connecting spring; 10. Movable seat; 11. Pushing seat; 12. Die-cutting blade; 13. Polyurethane buffer plate. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1-4 This utility model provides a pressure-compensated die-cutting roller, including: a roller body 1, a die-cutting plate 2 mounted on the surface of the roller body 1, a piezoelectric sensor 3 mounted on the outer side of the die-cutting plate 2, a polyurethane buffer plate 13 integrally mounted on the outer wall of the die-cutting plate 2, and a die-cutting blade plate 12 mounted on the surface of the polyurethane buffer plate 13.

[0024] Specifically, the surface structure of the die-cutting plate 2 consists of a polyurethane buffer plate 13 and a die-cutting blade 12. The piezoelectric sensor 3 provided on the surface of the die-cutting plate 2 cooperates with the die-cutting blade 12 to sense pressure. The polyurethane buffer plate 13 is elastic and adaptive elastic compensation is achieved.

[0025] A central shaft 4 is installed in the middle of the inside of the roller body 1. A connecting frame 5 is fixedly connected to the surface of the central shaft 4. A base 6 is fixedly installed on the surface of the connecting frame 5. A movable seat 10 is slidably installed at the front end of the connecting frame 5. A hydraulic cylinder 8 is installed between the movable seat 10 and the base 6. A push seat 11 is fixedly connected to the front end of the movable seat 10. The connecting frame 5 and the central shaft 4 are fixedly connected. The connecting frame 5 is arranged in a ring about the symmetrical center line of the central shaft 4. The connecting frame 5 and the base 6 are fixedly connected. The connecting frame 5 and the movable seat 10 are slidably connected. A folding rod 7 is rotatably connected between the movable seat 10 and the base 6. Shaft parts for rotatable connection are provided in the middle and both ends of the surface of the folding rod 7. A connecting spring 9 is provided on the inner side of the folding rod 7. The folding rod 7 is arranged in a ring about the symmetrical center line of the connecting frame 5.

[0026] Specifically, when the material passes between the roller bodies 1, the piezoelectric sensor 3 detects the local pressure value. If the pressure in a certain area is lower than the set value, the hydraulic cylinder 8 immediately injects hydraulic oil to compensate for the oil pressure, thereby pushing the movable seat 10 to move along the connecting frame 5 towards the corresponding die-cutting plate 2. The movable seat 10 is equipped with a push seat 11. The movement of the movable seat 10 will move the push seat 11. When the movable seat 10 slides along the connecting frame 5, it will rotate the folding rod 7. The two ends and the middle of the folding rod 7 are provided with shaft parts, which will fold and extend in coordination with the movement of the movable seat 10. The push seat 11, in coordination with the movement of the movable seat 10, will push the die-cutting plate 2 fitted and installed on the roller body 1 to compensate for the pressure, so that the pressure in that area returns to the standard value.

[0027] The working principle of this utility model is as follows:

[0028] When using this invention, the material to be die-cut is first placed between two roller bodies 1. An external drive device rotates the roller bodies 1 from the ends of the rollers, thereby performing the die-cutting operation. During the die-cutting process, the piezoelectric sensor 3 detects the local pressure value exerted on the material by the die-cutting plate 2 in real time and transmits the detected pressure value to the external controller. If the pressure value of a certain area of ​​the die-cutting plate 2 on the roller body 1 is lower than the preset standard value, the external controller will immediately control the hydraulic cylinder 8 to start. A pressure testing device is disclosed in the existing patent with publication number CN103542962A, which is equipped with a piezoelectric pressure sensor and discloses... The relevant technologies have been studied, and it can be concluded that the piezoelectric sensor 3 is a mature existing technology. Therefore, it is not described in detail. After hydraulic oil is injected into the hydraulic cylinder 8, the hydraulic cylinder 8 extends and retracts, thereby pushing the movable seat 10 to move along the connecting frame 5. The movable seat 10 is equipped with a push seat 11. A set of connecting frames 5 corresponds to a set of die-cutting plates 2. Therefore, the push seat 11, in conjunction with the movement of the movable seat 10, will push the die-cutting plate 2 at the corresponding position to perform pressure compensation, thereby increasing the pressure in that area. At the same time, a polyurethane buffer plate 13 is provided on the surface of the die-cutting plate 2. The polyurethane buffer plate 13 increases the elastic pressure compensation of the die-cutting plate 2 body, which, in conjunction with the push of the hydraulic cylinder 8 on the connecting frame 5, achieves pressure compensation.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A pressure-compensated die-cutting roller, characterized in that, include: A roller body (1) is provided with a die-cutting plate (2) mounted on its surface. A piezoelectric sensor (3) is mounted on the outer side of the die-cutting plate (2). A central shaft (4) is mounted in the middle of the inside of the roller body (1). A connecting frame (5) is fixedly connected to the surface of the central shaft (4). A base (6) is fixedly mounted on the surface of the connecting frame (5). A movable seat (10) is slidably mounted on the front end of the connecting frame (5). A hydraulic cylinder (8) is installed between the movable seat (10) and the base (6). A push seat (11) is fixedly connected to the front end of the movable seat (10).

2. The pressure-compensated die-cutting roller according to claim 1, characterized in that, The outer wall of the die-cutting plate (2) is integrally fitted with a polyurethane buffer plate (13), and a die-cutting blade plate (12) is installed on the surface of the polyurethane buffer plate (13).

3. A pressure-compensated die-cutting roller according to claim 1, characterized in that, The connecting frame (5) is fixedly connected to the central axis (4), and the connecting frame (5) is distributed in a ring about the symmetrical center line of the central axis (4).

4. A pressure-compensated die-cutting roller according to claim 3, characterized in that, The connecting frame (5) is fixedly connected to the base (6), and the connecting frame (5) is slidably connected to the movable seat (10).

5. A pressure-compensated die-cutting roller according to claim 1, characterized in that, A folding rod (7) is rotatably connected between the movable seat (10) and the base (6), and the folding rod (7) has shaft parts for rotatable connection at the middle and both ends of its surface.

6. A pressure-compensated die-cutting roller according to claim 5, characterized in that, A connecting spring (9) is provided on the inner side of the folding rod (7), and the folding rod (7) is distributed in a ring about the symmetrical center line of the connecting frame (5).

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