A feeding structure and a packaging bag printing machine

Abstract

The utility model discloses a kind of feeding structure and packaging bag printing machine, including the feeding assembly of being installed in the feeding side of rack, the feeding assembly includes: unwinding roller and connecting assembly, the unwinding roller is rotatably installed on rack by connecting assembly;The connecting assembly includes rotatably installed in the support shaft of both sides of rack;Corner bar is fixedly equipped on the support shaft of both sides, and one end between two groups of corner bar is rotatably installed with tension roller, and the other end of corner bar is provided with sliding slot, and hydraulic rod is fixedly installed on the rack, and the free end of hydraulic rod is rotatably installed with the sliding block of sliding cooperation with sliding slot.In the utility model, by introducing tension adjusting mechanism of hydraulic rod, corner bar, sliding block composition, combined with the feedback control mechanism of guide roller group and pressure sensor, realize the dynamic regulation of the tension of packaging bag in unwinding process, to improve printing quality and equipment automation level.

Description

Technical Field

[0001] This utility model relates to the field of printing press technology, and in particular to a feeding structure and a packaging bag printing machine. Background Technology

[0002] A printing press is a machine for printing text and images. The text and images to be printed are made into a printing plate, which is then mounted on the printing press. The printing press then applies ink to the areas on the printing plate containing the text and images, and the ink is then transferred directly or indirectly to paper or other printing substrates, thereby producing a printed product identical to the printing plate.

[0003] A Chinese utility model patent with publication number CN219667718U discloses "a printing machine for packaging bags, including a printing machine housing; a transmission roller, a heating element, and a printing roller are installed inside the printing machine housing; the printing machine housing is mounted on the side of a frame via a tripod; a connecting rod is installed above the frame; four connecting rods are provided; a worktable is formed by the four connecting rods; and a rotating roller is provided inside the worktable." However, this printing machine has a problem: its feeding roller is responsible for both unwinding and tensioning operations, and both are located on the same axis, making it difficult to precisely control the tension. Specifically, at the beginning of unwinding, due to the large diameter and weight of the material roll, the tension on the packaging bag is correspondingly increased. As the material roll is gradually consumed, the diameter decreases, and the tension on the packaging bag weakens accordingly. If this tension change exceeds the preset range, it will significantly affect the printing accuracy and increase the scrap rate. Utility Model Content

[0004] The purpose of this utility model is to solve the technical problem of unstable tension caused by the sharing of a single shaft for unwinding and tension control in existing printing presses, which affects printing accuracy and yield. Therefore, this utility model proposes a feeding structure and a packaging bag printing machine.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A feeding structure includes a feeding assembly installed on the feed side of a frame, the feeding assembly comprising:

[0007] An unwinding roller and a connecting assembly, wherein the unwinding roller is rotatably mounted on a frame via the connecting assembly;

[0008] The connecting assembly includes support shafts rotatably mounted on both sides of the frame;

[0009] Angle rods are fixedly sleeved on the support shafts on both sides. Tension rollers are rotatably installed between one end of the two sets of angle rods. A sliding groove is opened at the other end of the angle rod. A hydraulic rod is fixedly installed on the frame. A slider that slides in cooperation with the sliding groove is rotatably installed at the free end of the hydraulic rod.

[0010] A drive motor that is connected to the support shaft is fixedly mounted on the frame.

[0011] As a further description of the above technical solution:

[0012] The connecting assembly also includes a sleeve and bolts. The sleeve is axially guided and sleeved on the free end of the support shaft and the unwinding roller. The sleeve and the unwinding roller are fixedly connected by bolts.

[0013] As a further description of the above technical solution:

[0014] Multiple sets of guide blocks are fixedly connected to the inner walls of both ends of the sleeve. The unwinding roller and the support shaft are respectively provided with a first guide groove and a second guide groove that slide in cooperation with the guide blocks at both ends of the sleeve. The second guide groove is closed at both ends.

[0015] As a further description of the above technical solution:

[0016] It also includes a material guiding assembly that works in conjunction with the feeding assembly. The material guiding assembly includes a first guide roller. The top of the frame has two oblong holes on both sides to accommodate the first guide roller. A pressure sensor that is tangent to the free end of the first guide roller is fixedly installed on the oblong hole. The pressure sensor acts on a hydraulic rod.

[0017] As a further description of the above technical solution:

[0018] The first guide roller is fixedly fitted with limiting plates located on both sides of the frame at both ends.

[0019] As a further description of the above technical solution:

[0020] The material guiding assembly also includes a second guide roller, a third guide roller, and a fourth guide roller. The second guide roller is rotatably mounted on the frame at a position symmetrical to the first guide roller, and the third and fourth guide rollers are rotatably mounted on symmetrical positions on both sides of the upper part of the frame.

[0021] As a further description of the above technical solution:

[0022] A packaging bag printing machine includes the feeding structure described above;

[0023] The frame is sequentially equipped with a feeding assembly, a printing assembly, a guiding assembly, and a discharging assembly along the discharge direction. The fourth guide roller cooperates with the printing assembly. The discharging assembly includes a take-up roller, which is rotatably mounted on the discharge side of the frame via a connecting assembly.

[0024] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0025] 1. In this utility model, the pressure sensor detects the pressure applied to the first guide roller by the material in real time. If the material tension is too high (such as the initial roll diameter is large), the pressure value detected by the pressure sensor increases, the control system responds, drives the hydraulic rod to extend, pushes the slider to slide along the slide groove, the corner rod swings, and drives the tension roller to move downward to reduce the material tension. Conversely, if the tension is too low (such as the roll becomes smaller), the sensor signal weakens, the hydraulic rod retracts, the tension roller rises, and the tension increases. Through this closed-loop feedback mechanism, dynamic tension control is achieved to ensure that the tension is stable throughout the unwinding process.

[0026] 2. In this utility model, the packaging bag roll is installed on the unwinding roller, the tension roller is in the initial position and controlled by the hydraulic rod. The material passes through the first guide roller, the tension roller, the printing component, the fourth guide roller, the second guide roller, the third guide roller, and the take-up roller in sequence. The drive motor starts and drives the unwinding roller to rotate, releasing the material. The material is guided by the guide component through the printing component. After printing is completed, the material continues to be conveyed forward to the unloading component. The take-up roller starts to work and rolls up the printed material into a roll, completing the entire process. Attached Figure Description

[0027] Figure 1 A three-dimensional structural diagram of a feeding structure and a packaging bag printing machine according to an embodiment of the present utility model is shown;

[0028] Figure 2 A three-dimensional structural schematic diagram of the feeding assembly provided according to an embodiment of the present utility model is shown;

[0029] Figure 3 An exploded view of the connecting assembly provided according to an embodiment of the present invention is shown;

[0030] Figure 4 The present invention provides an embodiment of the present invention. Figure 1 A magnified structural diagram of point A in the middle.

[0031] Legend:

[0032] 1. Frame; 101. Waist-shaped hole; 2. Feeding assembly; 21. Unwinding roller; 2101. First guide groove; 22. Connecting assembly; 221. Sleeve; 222. Guide block; 223. Bolt; 224. Support shaft; 22401. Second guide groove; 23. Tension roller; 24. Drive motor; 25. Angle bar; 2501. Slide groove; 26. Slider; 27. Hydraulic rod; 3. Printing assembly; 4. First guide roller; 5. Second guide roller; 6. Third guide roller; 7. Unloading assembly; 8. Fourth guide roller; 9. Limiting plate; 10. Pressure sensor. Detailed Implementation

[0033] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0034] Example 1

[0035] Please see Figure 1-4 This utility model provides a technical solution: a feeding structure, including a feeding assembly 2 installed on the feeding side of a frame 1. The feeding assembly 2 includes an unwinding roller 21 and a connecting assembly 22. The unwinding roller 21 is rotatably mounted on the frame 1 via the connecting assembly 22, and is used to carry and release the packaging bag to be printed. The connecting assembly 22 includes support shafts 224 rotatably mounted on both sides of the frame 1. Angle rods 25 are fixedly sleeved on the support shafts 224 on both sides. A tension roller 23 is rotatably mounted between one end of the two sets of angle rods 25, serving as a tension adjustment actuator. By adjusting... The position of the tension roller 23 changes the curvature of the material path, thereby adjusting the tension. The other end of the angle rod 25 is provided with a slide groove 2501. A hydraulic rod 27 is fixedly installed on the frame 1. The free end of the hydraulic rod 27 is rotatably mounted with a slider 26 that slides in the slide groove 2501. The slider 26 slides in the slide groove 2501 as the hydraulic rod extends and retracts, thereby pushing the angle rod 25 to swing around the support shaft 224, which drives the tension roller 23 to move up and down. A drive motor 24 that is connected to the support shaft 224 is fixedly installed on the frame 1, which drives the unwinding roller 21 to rotate and unwind the material.

[0036] Specifically, such as Figure 3 As shown, the connecting assembly 22 also includes a sleeve 221 and bolts 223. The sleeve 221 is sleeved on the free ends of the support shaft 224 and the unwinding roller 21. Multiple sets of guide blocks 222 are fixedly connected to the inner walls of both ends of the sleeve 221. The unwinding roller 21 and the support shaft 224 are respectively provided with a first guide groove 2101 and a second guide groove 22401 that slide in cooperation with the guide blocks 222 at both ends of the sleeve 221. The second guide groove 22401 is closed at both ends to achieve adjustable axial positioning and synchronous rotation. The sleeve 221 and the unwinding roller 21 are fixedly connected by bolts 223, which facilitates disassembly and replacement of the material roll.

[0037] Specifically, such as Figure 1 and Figure 4As shown, it also includes a material guiding assembly that cooperates with the feeding assembly 2. The material guiding assembly includes a first guide roller 4. The top of the frame 1 has waist-shaped holes 101 on both sides to accommodate the first guide roller 4. The two ends of the first guide roller 4 are respectively fixedly fitted with limiting plates 9 located on both sides of the frame 1. A pressure sensor 10 tangent to the free end of the first guide roller 4 is fixedly installed on the waist-shaped hole 101. The first guide roller 4 acts on the pressure sensor 10 to detect the material tension and feed it back to the hydraulic rod control system.

[0038] Specifically, such as Figure 1 As shown, the material guiding assembly also includes a second guide roller 5, a third guide roller 6, and a fourth guide roller 8. The second guide roller 5 is rotatably mounted on the frame 1 at a position symmetrical to the first guide roller 4. The third guide roller 6 and the fourth guide roller 8 are rotatably mounted on symmetrical positions on both sides of the upper part of the frame 1, respectively arranged in different parts of the frame 1 to guide the material direction.

[0039] Example 2

[0040] Specifically, such as Figure 1 As shown, a packaging bag printing machine includes a feeding structure as in Embodiment 1. A feeding component 2, a printing component 3, a guiding component, and a discharging component 7 are sequentially installed on the frame 1 along the discharge direction. A fourth guide roller 8 cooperates with the printing component 3 to guide the material before it enters the printing area. The discharging component 7 includes a take-up roller, which is rotatably mounted on the discharge side of the frame 1 through a connecting component 22 to realize the recycling of materials after printing.

[0041] Working principle: During use, the packaging bag roll is installed on the unwinding roller 21, and the tension roller 23 is in the initial position and controlled by the hydraulic rod 27. The material passes through the first guide roller 4, tension roller 23, printing component 3, fourth guide roller 8, second guide roller 5, third guide roller 6, and take-up roller in sequence. The drive motor 24 starts and drives the unwinding roller 21 to rotate, releasing the material. The material is guided by the guide component through the printing component 3. After printing is completed, the material continues to be conveyed forward to the unloading component 7. The take-up roller starts to work and rolls up the printed material into a roll, completing the entire process.

[0042] The pressure sensor 10 detects the pressure applied to the first guide roller 4 by the material in real time. If the material tension is too high (e.g., the initial roll diameter is large), the pressure value detected by the pressure sensor 10 increases. The control system responds by driving the hydraulic rod 27 to extend, pushing the slider 26 to slide along the slide groove 2501, and the angle rod 25 to swing, causing the tension roller 23 to move downward to reduce the material tension. Conversely, if the tension is too low (e.g., the roll becomes smaller), the sensor signal weakens, the hydraulic rod retracts, and the tension roller rises to increase the tension. Through this closed-loop feedback mechanism, dynamic tension control is achieved to ensure that the tension is stable throughout the unwinding process.

[0043] 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 feeding structure, comprising a feeding assembly (2) mounted on the feeding side of a frame (1), characterized in that, The feeding assembly (2) includes: An unwinding roller (21) and a connecting assembly (22), wherein the unwinding roller (21) is rotatably mounted on the frame (1) via the connecting assembly (22); The connecting assembly (22) includes support shafts (224) rotatably mounted on both sides of the frame (1). Angle rods (25) are fixedly sleeved on the support shafts (224) on both sides. Tension rollers (23) are rotatably installed between one end of the two sets of angle rods (25). A sliding groove (2501) is opened at the other end of the angle rods (25). A hydraulic rod (27) is fixedly installed on the frame (1). A slider (26) that slides in cooperation with the sliding groove (2501) is rotatably installed at the free end of the hydraulic rod (27). A drive motor (24) that is connected to the support shaft (224) is fixedly installed on the frame (1).

2. The feeding structure according to claim 1, characterized in that, The connecting assembly (22) further includes a sleeve (221) and a bolt (223). The sleeve (221) is axially guided and sleeved on the free end of the support shaft (224) and the unwinding roller (21). The sleeve (221) and the unwinding roller (21) are fixedly connected by the bolt (223).

3. The feeding structure according to claim 2, characterized in that, Multiple sets of guide blocks (222) are fixedly connected to the inner walls of both ends of the sleeve (221). The unwinding roller (21) and the support shaft (224) are respectively provided with a first guide groove (2101) and a second guide groove (22401) that slide with the guide blocks (222) at both ends of the sleeve (221). The second guide groove (22401) is closed at both ends.

4. The feeding structure according to claim 3, characterized in that, It also includes a material guiding assembly that works in conjunction with the feeding assembly (2). The material guiding assembly includes a first guide roller (4). The top two sides of the frame (1) are provided with waist-shaped holes (101) for accommodating the first guide roller (4). A pressure sensor (10) that is tangent to the free end of the first guide roller (4) is fixedly installed on the waist-shaped hole (101). The pressure sensor (10) acts on the hydraulic rod (27).

5. The feeding structure according to claim 4, characterized in that, The first guide roller (4) is fixedly fitted with limiting plates (9) located on both sides of the frame (1) at both ends.

6. The feeding structure according to claim 5, characterized in that, The material guiding assembly also includes a second guide roller (5), a third guide roller (6) and a fourth guide roller (8). The second guide roller (5) is rotatably mounted on the frame (1) at a position symmetrical to the first guide roller (4). The third guide roller (6) and the fourth guide roller (8) are rotatably mounted on the upper two sides of the frame (1).

7. A packaging bag printing machine, characterized in that, Includes the feeding structure as described in any one of claims 1-6; The frame (1) is sequentially equipped with a feeding assembly (2), a printing assembly (3), a guiding assembly and a discharging assembly (7) along the discharge direction. The fourth guide roller (8) cooperates with the printing assembly (3). The discharging assembly (7) includes a take-up roller, which is rotatably mounted on the discharge side of the frame (1) through a connecting assembly (22).

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