A winding device

Abstract

This utility model discloses a winding device, including a U-shaped frame. Electric telescopic rods are fixed to both sides of the U-shaped frame. The telescopic ends of the two electric telescopic rods are located inside the U-shaped frame and are each fixed with an anti-winding component. A horizontal shaft is rotatably connected to one side of the U-shaped frame via a bearing. A detachable winding roller is fixed to the surface of the horizontal shaft. The surface of the winding roller has a groove for engaging a plastic bag. This utility model includes a U-shaped frame, electric telescopic rods, two sets of anti-winding components, a horizontal shaft, a winding roller, and a motor. Before the winding roller winds the plastic bag, the two sets of anti-winding components squeeze the sides of the plastic bag to prevent it from curling. The anti-winding components consist of a U-shaped plate, a pressure plate, and a spring. The spring squeezes the pressure plate into contact with the plastic bag, flexibly adapting to plastic bags of different thicknesses. The roller shaft also reduces the friction between the pressure plate and the plastic bag, making the movement resistance of the plastic bag smaller.

Description

Technical Field

[0001] This utility model relates to the field of plastic bag processing technology, and in particular to a winding device. Background Technology

[0002] The winding process is a crucial step in plastic bag manufacturing, directly impacting product quality and production efficiency. It typically occurs after blown or cast film production, using a winding machine to evenly and smoothly wind the plastic film into a roll, providing raw material for subsequent bag-making processes. Tension control is paramount during winding; excessive tension can cause film stretching and deformation, while insufficient tension may result in a loose roll. Therefore, modern winding equipment often employs automatic tension control systems to ensure consistent tension across the inner and outer layers of the roll.

[0003] A search revealed that patent CN215438989U discloses a plastic bag winding device. This device uses an anti-rolling mechanism, where bolts are unscrewed from the mounting block, separating two arc-shaped plates. This allows the locking rod to move out of the slot in the extension rod, which in turn moves the pressure plate upwards or downwards, facilitating the passage of plastic bags of varying thicknesses through the U-shaped frame. This ensures that the sides of the plastic bag are flattened during winding, preventing curling. However, this device requires frequent adjustment of the pressure plate position for winding plastic bags of different thicknesses, lacking adaptability. Furthermore, the high friction between the pressure plate and the plastic bag results in significant resistance to movement, making the bag prone to tearing. Additionally, the device cannot quickly fix the free end of the plastic bag to the surface of the winding roller during roll changes, leading to long roll-changing times. Therefore, further improvements are needed. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a winding device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a winding device, including a U-shaped frame, with electric telescopic rods fixed on both sides of the U-shaped frame. The telescopic ends of the two electric telescopic rods are located inside the U-shaped frame and are each fixed with an anti-winding component. A horizontal shaft is rotatably connected to one side of the U-shaped frame via a bearing. A detachable winding roller is fixed to the surface of the horizontal shaft. A strip groove for inserting a plastic bag is opened on the surface of the winding roller. A pressure strip is inserted inside the strip groove. A motor for driving the horizontal shaft to rotate is installed outside the U-shaped frame.

[0006] Furthermore, the U-shaped frame is rotatably connected to the first guide roller and the second guide roller on both sides of the anti-rolling assembly.

[0007] Furthermore, the anti-rolling assembly includes a U-shaped plate fixed to the telescopic end of the electric telescopic rod. The U-shaped plate has two pressure plates inside, and the sides of the two pressure plates that are far apart from each other are fixedly connected to the inner wall of the U-shaped plate with springs.

[0008] Furthermore, multiple grooves are provided on adjacent sides of the two pressure plates, and rollers are rotatably connected inside the grooves.

[0009] Furthermore, the end of the horizontal shaft near the motor is fixedly connected to the motor output end, and a baffle is fixedly attached to the surface of the horizontal shaft near the motor. The take-up roller is slidably sleeved on the surface of the horizontal shaft. The surface of the horizontal shaft away from the baffle is provided with an external thread, and an internal thread cap is threadedly connected to the surface of the external thread. The internal thread cap and the baffle press and fix the take-up roller.

[0010] Furthermore, the length of the pressure strip is greater than the length of the take-up roller, and rubber sleeves are fixed to the surface of the pressure strip and the inner sidewall of the strip groove.

[0011] Furthermore, the U-shaped frame has a notch on its side wall near the internal thread cap.

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

[0013] 1. In use, this utility model is a winding device equipped with a U-shaped frame, an electric telescopic rod, two sets of anti-winding components, a horizontal shaft, a winding roller, and a motor. Before the winding roller winds the plastic bag, the two sets of anti-winding components squeeze the sides of the plastic bag to prevent the sides of the plastic bag from curling. The anti-winding components are composed of a U-shaped plate, a pressure plate, and a spring. The spring squeezes the pressure plate into contact with the plastic bag, flexibly adapting to plastic bags of different thicknesses. The roller shaft can also reduce the friction between the pressure plate and the plastic bag, making the movement resistance of the plastic bag smaller and preventing damage to the plastic bag.

[0014] 2. When in use, this utility model is a winding device equipped with a motor, a horizontal shaft and a winding roller. The surface of the winding roller has a strip groove. When fixing a plastic bag, the plastic bag is inserted into the strip groove, and then a pressure strip is inserted into the strip groove to fix the plastic bag by friction, making it faster and more convenient to fix the plastic bag during roll changing. Attached Figure Description

[0015] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 : Overall perspective view of this utility model;

[0017] Figure 2 : Overall top view of this utility model;

[0018] Figure 3 : Overall side sectional view of this utility model;

[0019] Figure 4 The present utility model Figure 3 Enlarged view of point A in the middle;

[0020] Figure 5 : A three-dimensional view of the winding roller of this utility model.

[0021] The attached figures are labeled as follows:

[0022] 1. U-shaped frame; 2. Electric telescopic rod; 3. Anti-roll assembly; 31. U-shaped plate; 32. Pressure plate; 33. Groove; 34. Roller shaft; 35. Spring; 4. First guide roller; 5. Second guide roller; 6. Horizontal shaft; 61. Internal threaded cap; 7. Rewinding roller; 71. Strip groove; 72. Pressure strip; 8. Motor. Detailed Implementation

[0023] 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.

[0024] like Figures 1-5 As shown, a winding device is disclosed, including a U-shaped frame 1. Electric telescopic rods 2 are fixed on both sides of the U-shaped frame 1. The telescopic ends of the two electric telescopic rods 2 are located inside the U-shaped frame 1 and are fixed with anti-winding components 3. A horizontal shaft 6 is rotatably connected to one side of the U-shaped frame 1 through a bearing. A detachable winding roller 7 is fixed on the surface of the horizontal shaft 6. A strip groove 71 for inserting a plastic bag is opened on the surface of the winding roller 7. A pressure strip 72 is inserted inside the strip groove 71. A motor 8 for driving the horizontal shaft 6 to rotate is installed outside the U-shaped frame 1.

[0025] Inside the U-shaped frame 1, on both sides of the anti-rolling assembly 3, are rotatably connected a first guide roller 4 and a second guide roller 5.

[0026] In this embodiment, the first guide roller 4 and the second guide roller 5 can guide the movement of the plastic bag, ensuring that the plastic bag can pass through the interior of the two anti-rolling components 3.

[0027] The anti-rolling assembly 3 includes a U-shaped plate 31 fixed to the telescopic end of the electric telescopic rod 2. Two pressure plates 32 are provided inside the U-shaped plate 31. The sides of the two pressure plates 32 that are far apart from each other are fixedly connected to the inner wall of the U-shaped plate 31 with springs 35.

[0028] When the side of the plastic bag passes between the two pressure plates 32 of each anti-roll assembly 3, the spring 35 squeezes the pressure plate 32 into contact with the plastic bag, thereby pressing the side of the plastic bag to prevent the side of the plastic bag from curling. Under the squeezing action of the spring 35, the anti-roll assembly 3 can adapt to plastic bags of different thicknesses.

[0029] Multiple grooves 33 are provided on the adjacent sides of the two pressure plates 32, and rollers 34 are rotatably connected inside the grooves 33.

[0030] When the plastic bag passes between the two pressure plates 32, the roller 34 replaces the pressure plates 32 and contacts the plastic bag. During the movement of the plastic bag, the roller 34 is driven to rotate, thereby reducing the resistance to the movement of the plastic bag.

[0031] The end of the horizontal shaft 6 near the motor 8 is fixedly connected to the output end of the motor 8. A baffle is fixed on the surface of the horizontal shaft 6 near the motor 8. The take-up roller 7 is slidably sleeved on the surface of the horizontal shaft 6. The surface of the horizontal shaft 6 away from the baffle is provided with an external thread, and an internal thread cap 61 is threadedly connected to the external thread surface. The internal thread cap 61 and the baffle press and fix the take-up roller 7.

[0032] When replacing the take-up roller 7, first unscrew the inner thread cap 61 from the surface of the horizontal shaft 6, then pull the take-up roller 7 off the surface of the horizontal shaft 6, then put another take-up roller 7 on the surface of the horizontal shaft 6, and then screw the inner thread cap 61 back on the surface of the horizontal shaft 6. Use the inner thread cap 61 and the baffle to press and fix the take-up roller 7.

[0033] The length of the pressure strip 72 is greater than the length of the take-up roller 7, and rubber sleeves are fixed on the surface of the pressure strip 72 and the inner wall of the strip groove 71.

[0034] After replacing the take-up roller 7, insert the free end of the plastic bag into the strip groove 71 on the surface of the take-up roller 7. Then insert the pressure strip 72 into the strip groove 71. The pressure strip 72 is used to squeeze the free end of the plastic bag into the strip groove 71. The rubber sleeve can increase the friction and ensure the stability of the pressure strip 72 in squeezing the plastic bag. As the plastic bag is wrapped around the surface of the take-up roller 7, the pressure strip 72 is located inside the plastic bag.

[0035] A notch is provided on the side wall of the U-shaped frame 1, near the inner thread cap 61. This facilitates the disassembly, replacement, and installation of the take-up roller 7 at the notch.

[0036] Working principle: During normal winding, the motor 8 drives the horizontal shaft 6 and the winding roller 7 to grip the plastic bag. The winding roller 7 is used to wind up the plastic bag. The two sides of the plastic bag are squeezed by the roller shaft 34 of the anti-winding component 3 to prevent curling and deformation. After winding is completed, the motor 8 is turned off and the plastic bag is cut. Then the wound winding roller 7 is disassembled, a new winding roller 7 is replaced and fitted onto the surface of the horizontal shaft 6, and winding can continue.

[0037] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A winding device comprising a U-shaped frame (1), characterized in that: Electric telescopic rods (2) are fixed on both sides of the U-shaped frame (1). The telescopic ends of the two electric telescopic rods (2) are located inside the U-shaped frame (1) and are fixed with anti-rolling components (3). A horizontal shaft (6) is rotatably connected to one side of the U-shaped frame (1) through a bearing. A detachable take-up roller (7) is fixed on the surface of the horizontal shaft (6). A strip groove (71) for inserting a plastic bag is opened on the surface of the take-up roller (7). A pressure strip (72) is inserted inside the strip groove (71). A motor (8) for driving the horizontal shaft (6) to rotate is installed outside the U-shaped frame (1).

2. A winding device according to claim 1, characterized in that The first guide roller (4) and the second guide roller (5) are rotatably connected inside the U-shaped frame (1) and on both sides of the anti-rolling assembly (3).

3. A winding device according to claim 1, characterized in that: The anti-rolling assembly (3) includes a U-shaped plate (31) fixed to the telescopic end of the electric telescopic rod (2). The U-shaped plate (31) has two pressure plates (32) inside. The two pressure plates (32) are fixedly connected to the inner wall of the U-shaped plate (31) on the side that is far away from each other. Springs (35) are fixedly connected to the inner wall of the U-shaped plate (31).

4. A winding device according to claim 3, characterized in that: Multiple grooves (33) are provided on adjacent sides of the two pressure plates (32), and rollers (34) are rotatably connected inside the grooves (33).

5. A winding device according to claim 1, characterized in that: The horizontal shaft (6) is fixedly connected to the output end of the motor (8) at one end. A baffle is fixed on the surface of the horizontal shaft (6) at one end near the motor (8). The take-up roller (7) is slidably sleeved on the surface of the horizontal shaft (6). The surface of the horizontal shaft (6) away from the baffle is provided with an external thread, and an internal thread cap (61) is threadedly connected to the external thread surface. The internal thread cap (61) and the baffle press and fix the take-up roller (7).

6. A winding device according to claim 1, characterized in that: The length of the pressure strip (72) is greater than the length of the take-up roller (7), and rubber sleeves are fixed on the surface of the pressure strip (72) and the inner sidewall of the strip groove (71).

7. A winding device according to claim 5, characterized in that: The U-shaped frame (1) has a notch on its side wall near the internal thread cap (61).

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