Winding and unwinding device for wrapping film

Abstract

The utility model relates to the field of winding film production equipment, and discloses a winding and unwinding device for a winding film, a winding roller (4) is used for receiving the winding film output by an unwinding roller (3) and completing discharging, and a rack (1) comprises a fixed cross beam (2). The fly-cutter guide rail (5) extends in the left-right direction, the fly-cutter guide rail (5) is installed on the fixed cross beam (2), the fly-cutter comprises a cutter nose (51) and a cutter rest (52), the cutter rest (52) is arranged on the fly-cutter guide rail (5) in a sliding mode, the cutter nose (51) is arranged downwards, when the unwinding roller (3) conducts unwinding, the fly-cutter is located on the side edge of a winding film, and when the unwinding roller (3) stops unwinding, the cutter rest (52) is located on the side edge of the winding film. And the tool rest (52) slides to enable the tool nose (51) to pass through the space between the unwinding roller (3) and the winding roller (4). The fly cutter is arranged between the unwinding roller and the winding roller, so that the winding film can be quickly and neatly cut, and film damage possibly caused by physical tearing is avoided.

Description

Technical Field

[0001] The utility model relates to the field of winding film production equipment, in particular to a winding and unwinding device for winding film. Background Art

[0002] In the process of winding and unwinding the wrapping film, accurate and efficient cutting is the key to ensuring product quality and production efficiency. For example, in the Chinese invention patent with publication number CN118083652A, entitled "Automatic winding device for wrapping film production", paragraph 53 of the specification discloses that the cutting assembly 300 includes a first lifting frame 310, a lifting rod 320, a cutter 330 and a first telescopic member 340, the first telescopic member 340 is symmetrically arranged, the bottom of the first lifting frame 310 is fixedly connected to the frame 100, the lifting rod 320 is fixedly connected to one end of the upper part of the first lifting frame 310, the first telescopic member 340 is fixedly connected to the lifting rod 320, the output end of the first telescopic member 340 is fixedly connected to the cutter 330, and the cutter 330 is slidably connected inside the lifting rod 320. Paragraph 57 of the specification discloses that "at the same time, the lifting end of the first lifting frame 310 drives the lifting rod 320 to lift the wrapping film, and the output end of the first telescopic member 340 drives the cutting knife 330 to lift, and the wrapping film on the upper part of the lifting rod 320 is cut, and the adhesion of the wrapping film itself is utilized, and the cut side of the wrapping film will adhere to the outside of the winding drum 280, and the driving wheel 220 is utilized to drive the winding rod 270 and the winding drum 280 to rotate, and the wrapping film is continuously wound." Combined with its Figures 7 and 8, it can be seen that the traditional toothed knife of the automatic winding equipment uses the lifting and lowering of the lifting rod to achieve the cutting of the wrapping film. This method requires the wrapping film to be tightened, the toothed knife bounces up, and then small holes are punched in the wrapping film, and then the wrapping film is torn apart. For a thicker wrapping film, or a wrapping film with different thicknesses on the left and right, the wrapping film is easily not completely broken or torn off, which affects the production efficiency and product quality. Summary of the invention

[0003] The utility model aims at the shortcomings of the prior art and provides a winding and unwinding device for a wrapping film.

[0004] To solve the above technical problems, the utility model is solved by the following technical solutions:

[0005] The winding and unwinding device of the stretch film includes a frame, an unwinding roller, a winding roller, and a flying knife guide rail. The winding roller is used to receive the stretch film output by the unwinding roller and complete the unloading. The frame includes a fixed crossbeam. It also includes a flying knife guide rail and a flying knife, which extend along the left and right directions. The flying knife guide rail is installed on the fixed crossbeam. The flying knife includes a knife tip and a knife holder. The knife holder is slidably arranged on the flying knife guide rail, and the knife tip is arranged downward. When the unwinding roller unwinds the material, the flying knife is located on the side of the stretch film. When the unwinding roller stops unwinding the material, the knife holder slides so that the knife tip passes between the unwinding roller and the winding roller. By arranging the flying knife between the unwinding roller and the winding roller, the stretch film can be cut quickly and cleanly, avoiding the damage to the film material that may be caused by physical tearing.

[0006] Preferably, the knife holder is connected with a slide block, which cooperates with the knife guide rail and slides on the knife guide rail. The knife holder can slide along the knife guide rail so that the knife tip can be accurately positioned between the unwinding roller and the winding roller, thereby improving the accuracy of cutting.

[0007] Preferably, brackets are provided on the wall panels on the left and right sides of the frame, synchronous wheels are installed on the brackets, synchronous belts are provided on the outer sleeves of the synchronous wheels on the left and right sides, at least one of the synchronous wheels is connected to a motor, and the knife holder is fixed to the lower half of the synchronous belt, so that the synchronous wheel rotates to drive the flying knife to move back and forth. Through the cooperation of the synchronous wheel and the synchronous belt, the stable reciprocating motion of the flying knife is realized, which is driven by the motor, and the response speed and control accuracy of the cutting action are improved. The use of the synchronous belt can make the flying knife slide faster and be replaced quickly, and the equipment maintenance cost is low. There is no matching gap like the gear rack when rotating forward and reverse, so the transmission is more stable.

[0008] Preferably, the flying knife holder has a first slot, a second slot and a cover plate, the cover plate is pressed on the top of the first slot, and the synchronous belt passes through the first slot and is engaged in the first slot through the cover plate, thereby ensuring a stable connection between the synchronous belt and the holder and facilitating the positioning and fixing of the holder.

[0009] Preferably, the slider is accommodated in the second slot, which provides additional stability and sliding smoothness, and ensures the smooth movement of the tool holder on the flying knife guide rail.

[0010] Preferably, a horizontally arranged hydraulic cylinder is provided on one side of the bracket, and a piston output end of the hydraulic cylinder is fixedly connected to the tool holder. The hydraulic cylinder can adjust the initial position of the tool holder by electrical control, which is convenient for the operator to operate.

[0011] Preferably, a position sensor is installed on at least one side of the bracket, and the position sensor is connected to the motor through the main control device. The position sensor senses the knife holder or the knife tip of the flying knife. By connecting the position sensor to the main control device, accurate monitoring and control of the flying knife position is achieved, ensuring the accuracy of cutting.

[0012] Preferably, the frame has a winding station and an unwinding station. When the winding roller is located at the winding station, the winding roller winds the wrapping film on the unwinding roller. After the winding roller is transferred to the unwinding station or during the transfer process, the flying knife moves so that the tip of the knife passes between the winding roller and the unwinding roller.

[0013] The utility model has significant technical effects due to the adoption of the above technical solutions:

[0014] The wrapping film winding and unwinding device of the utility model effectively solves the problem that the wrapping film is easily cut incompletely or easily torn in the prior art through an innovative flying knife cutting mechanism. The upper flying knife design allows for fast and precise cutting, which is not affected by the thickness or uniformity of the wrapping film. The drive system of the synchronous wheel and the synchronous belt provides a stable and controllable reciprocating motion of the flying knife, while the application of the hydraulic cylinder enhances the force and speed of the knife holder movement, and cooperates with the sensor to achieve efficient and precise cutting during the winding and unwinding process of the wrapping film, significantly improving the production efficiency and the quality of the cut wrapping film. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] Figure 2 It is a structural schematic diagram of the flying knife and the flying knife guide.

[0017] Figure 3 yes Figure 2 A partial enlarged view of middle A.

[0018] The names of the parts indicated by the numerical labels in the above drawings are as follows: 1. frame; 11. bracket; 12. synchronous wheel; 13. motor; 14. synchronous belt; 15. hydraulic cylinder; 16. position sensor; 2. fixed beam; 3. unwinding roller; 4. winding roller; 5. flying knife guide rail; 51. knife tip; 52. knife holder; 521. first slot; 522. second slot; 523. cover plate; 53. slider. DETAILED DESCRIPTION

[0019] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0020] Example 1

[0021] The winding and unwinding device of the stretch film, such as Figure 1As shown, it includes a frame 1, an unwinding roller 3, a winding roller 4, and a flying knife guide rail 5. The winding roller 4 is used to receive the winding film output by the unwinding roller 3 and complete the unloading. The frame 1 includes a fixed crossbeam 2. It also includes a flying knife guide rail 5 and a flying knife. The flying knife guide rail 5 extends along the left and right directions. The flying knife guide rail 5 is installed on the fixed crossbeam 2. The flying knife includes a knife tip 51 and a knife holder 52. The knife holder 52 is slidably arranged on the flying knife guide rail 5, and the knife tip 51 is arranged downward. When the unwinding roller 3 discharges the material, the flying knife is located on the side of the winding film. When the unwinding roller 3 stops discharging the material, the knife holder 52 slides to make the knife tip 51 pass between the unwinding roller 3 and the winding roller 4.

[0022] The tool holder 52 is connected with a slide block 53 , which cooperates with the flying knife guide rail 5 and slides on the flying knife guide rail 5 .

[0023] like Figure 2 As shown, brackets 11 are provided on the left and right wall panels of the frame 1, and synchronous wheels 12 are installed on the brackets 11. The synchronous wheels 12 on the left and right sides are outerly provided with synchronous belts 14. At least one side of the synchronous wheel 12 is connected to the motor 13, and the tool holder 52 is fixed to the lower half of the synchronous belt 14, so that when the synchronous wheel 12 rotates, it drives the flying knife to move back and forth.

[0024] like Figure 3 As shown, the flying knife holder 52 has a first slot 521 , a second slot 522 and a cover plate 523 . The cover plate 523 is pressed onto the first slot 521 . The synchronous belt 14 passes through the first slot 521 and is engaged in the first slot 521 through the cover plate 523 .

[0025] The slider 53 is received in the second slot 522 .

[0026] The bracket 11 on one side is provided with a horizontally arranged hydraulic cylinder 15 , and the piston output end of the hydraulic cylinder 15 is fixedly connected to the tool holder 52 .

[0027] A position sensor 16 is installed on at least one side of the bracket 11 , and the position sensor 16 is connected to the motor 13 through a main control device.

[0028] The frame 1 has a winding station and an unwinding station. When the winding roller 4 is at the winding station, the winding roller 4 winds up the wrapping film on the unwinding roller 3. After the winding roller 4 is transferred to the unwinding station or during the transfer process, the flying knife moves so that the knife tip 51 passes between the winding roller 4 and the unwinding roller 3.

[0029] Working principle: the transfer device places the empty winding roller 4 on the winding station above the unwinding roller 3 and is pressed, and then the rotating power source of the unwinding roller 3 drives the unwinding roller 3 to release the material and drives the winding roller 4 to reel in the plastic film. When the film is reeled to a preset degree, before the transfer of the winding roller 4 or after the transfer of the winding roller 4 to the unwinding station or after the winding roller 4 is transferred to the unwinding station, the film cutting begins. Before the film cutting begins, the flying knife is located on one side of the position where the winding film is to be cut, and the synchronous wheel 12 on at least one side rotates under the drive of the motor 13, and the synchronous belt sleeved on the synchronous wheel 12 starts to move according to whether the synchronous wheel rotates forward or reversely. The knife holder 52 of the flying knife and the synchronous belt 14 are fixed, so the flying knife also moves with the synchronous belt 14. Since the winding film between the unwinding roller 3 and the winding roller 4 is tensioned, the knife tip 51 of the flying knife passes between the unwinding roller 3 and the winding roller 4 to cut the winding film between them. For thicker wrapping films or wrapping films of varying thicknesses, the wrapping film will be completely cut because the cutter cuts through it from above, using a line-breaking method, thereby improving production efficiency. After the unwinding roller 3 rotates a certain angle, the winding roller 4 reaches the unloading station, and unloading is completed through the swing arms at both ends of the winding roller 4 or other methods. The unloading method is not the focus of the utility model, so its structure and working method are not described in detail here.

[0030] In the description of the present utility model, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0031] In short, the above is only a preferred embodiment of the present utility model, and all equivalent changes and modifications made according to the scope of the patent application of the present utility model should fall within the scope of the present utility model patent.

Claims

1. The winding and unwinding device of the stretch film is characterized in that: include A frame (1), the frame (1) comprising a fixed crossbeam (2); Unwinding roller (3); The winding roller (4) is used to receive the winding film output by the unwinding roller (3) and complete the unloading; The flying knife guide rail (5) extends in the left-right direction, and the flying knife guide rail (5) is installed on the fixed crossbeam (2); The flying knife comprises a knife tip (51) and a knife holder (52). The knife holder (52) is slidably arranged on the flying knife guide rail (5). The knife tip (51) is arranged downward. When the unwinding roller (3) discharges the material, the flying knife is located on the side of the winding film. When the unwinding roller (3) stops discharging the material, the knife holder (52) slides so that the knife tip (51) passes between the unwinding roller (3) and the winding roller (4).

2. The winding and unwinding device of the wrapping film according to claim 1, characterized in that: The tool holder (52) is connected with a slide block (53), and the slide block (53) cooperates with the flying knife guide rail (5) and slides on the flying knife guide rail (5).

3. The winding and unwinding device of the wrapping film according to claim 2, characterized in that: A bracket (11) is arranged on the wall panels on the left and right sides of the frame (1), a synchronous wheel (12) is installed on the bracket (11), and the outer shells of the synchronous wheels (12) on the left and right sides are provided with a synchronous belt (14), at least one of the synchronous wheels (12) is connected to a motor (13), and the knife holder (52) is fixed to the lower half of the synchronous belt (14), so that when the synchronous wheel (12) rotates, it drives the flying knife to perform a reciprocating motion.

4. The winding and unwinding device of the wrapping film according to claim 3, characterized in that: The flying knife holder (52) comprises a first clamping slot (521), a second clamping slot (522) and a cover plate (523); the cover plate (523) is pressed onto the top of the first clamping slot (521); the synchronous belt (14) passes through the first clamping slot (521) and is clamped into the first clamping slot (521) through the cover plate (523).

5. The winding and unwinding device of the wrapping film according to claim 4, characterized in that: The sliding block (53) is accommodated in the second slot (522).

6. The winding and unwinding device of the stretch film according to claim 3, characterized in that: The bracket (11) on one side is provided with a horizontally arranged hydraulic cylinder (15), and a piston output end of the hydraulic cylinder (15) is fixedly connected to the tool holder (52).

7. The winding and unwinding device of the wrapping film according to claim 6, characterized in that: A position sensor (16) is installed on at least one side of the bracket (11), and the position sensor (16) is connected to the motor (13) via a main control device.

8. The winding and unwinding device of the stretch film according to claim 6, characterized in that: The frame (1) is provided with a winding station and an unwinding station. When the winding roller (4) is located at the winding station, the winding roller (4) winds up the wrapping film on the unwinding roller (3). After the winding roller (4) is transferred to the unwinding station or during the transfer process, the flying knife moves so that the knife tip (51) passes between the winding roller (4) and the unwinding roller (3).

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