Plastic packaging bag slitting and shaping device

Abstract

The utility model relates to the technical field of plastic packaging bag production, especially a kind of plastic packaging bag slitting and shaping device, it can be stretched and flattened before the plastic film slitting, reduce the wrinkle of plastic film when slitting, guarantee the size and slitting quality of slitting, it is convenient to use, and reliability and practicality are high;Including support, pay-off roll and belt conveyor, pay-off roll rotation is installed on the upper end of belt conveyor, and belt conveyor is provided with conveying belt;It also includes guide mechanism, drive mechanism, slitting mechanism and stretching shaping mechanism, guide mechanism is located at the left side of support, guide mechanism has the function of guiding, drive mechanism is installed on support, drive mechanism has the function of output driving force, slitting mechanism is located above conveying belt, slitting mechanism has the function of slitting, stretching shaping mechanism is located at the left side of slitting mechanism, and stretching shaping mechanism has the function of stretching.

Description

Technical Field

[0001] This utility model relates to the technical field of plastic packaging bag production, and in particular to a plastic packaging bag cutting and shaping device. Background Technology

[0002] A plastic packaging bag slitting and shaping device is a device used to slit plastic packaging bags. Its main function is to cut rolls of plastic packaging material to a specified length, and it has a wide range of applications in the production process of plastic packaging bags. In the prior art, utility model patent application number 201520859689.3 discloses a plastic packaging bag cutting and shaping device, which mainly consists of a product conveyor belt and a cutting device. When cutting plastic film, the product conveyor belt transports the plastic film and moves the position to be cut on the plastic film to below the cutting device. Then, the cutting device cuts the plastic film to the specified length. However, the following problems exist in its use: when the product conveyor belt transports the plastic film, due to the plastic film's inherent flexibility, the vibration generated by the conveyor belt may cause wrinkles or edge misalignment in the plastic film, making it impossible to keep the film flat at the cutting position. In this case, when the cutting device cuts the wrinkled film, the cutting edges will be uneven, or even the cutting size will be deviated, affecting the production quality of the plastic packaging bags, making it inconvenient to use, and resulting in poor reliability. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a plastic packaging bag cutting and shaping device that can stretch and flatten the plastic film before cutting, reducing wrinkles during cutting, ensuring the cutting size and cutting quality, and is convenient to use, reliable and practical.

[0004] This utility model discloses a plastic packaging bag slitting and shaping device, comprising a support frame, an unwinding roller, and a belt conveyor. The unwinding roller is rotatably mounted on the upper end of the belt conveyor, which is equipped with a conveyor belt. It also includes a guiding mechanism, a driving mechanism, a slitting mechanism, and a stretching and shaping mechanism. The guiding mechanism is located on the left side of the support frame and has a guiding function. The driving mechanism is mounted on the support frame and has a driving force output function. The slitting mechanism is located above the conveyor belt and has a slitting function. The stretching and shaping mechanism is located to the left of the slitting mechanism and has a stretching function. A roll of plastic film is wound on the unwinding roller, and the plastic film is a double-layered film. The surface of the conveyor belt is provided with an anti-cutting layer, which can be made of stainless steel fiber blended fabric, glass fiber cloth, or ultra-high molecular weight polyethylene cloth. When slitting the plastic film into plastic bags, the device ensures that... One end of the plastic film on the support passes through the guide mechanism and enters the drive mechanism. The drive mechanism then conveys the plastic film to the left, causing it to fall onto the upper end of the conveyor belt. The drive mechanism continues to move the plastic film to the left on the upper end of the conveyor belt until the part of the plastic film that needs to be cut is below the slitting mechanism. At this point, the left end of the plastic film is below the stretching and shaping mechanism. Then, the stretching and shaping mechanism stretches the left end of the plastic film to the left, flattening it and preventing wrinkles during slitting. After that, the slitting mechanism cuts the plastic film, and the cut plastic film is conveyed by the belt conveyor to the sealing mechanism on the outside to be sealed to form packaging bags. Before slitting the plastic film, it can stretch and flatten the plastic film, reducing wrinkles during slitting, ensuring the slitting size and quality, and is convenient to use, reliable, and practical.

[0005] Preferably, the guiding mechanism includes a fixed frame and a guide roller. The fixed frame is located on the left side of the support, and the guide roller is rotatably mounted on the upper end of the fixed frame. When conveying the plastic film, the plastic film passes through the upper end of the guide roller before entering the driving mechanism, which facilitates the control of the movement trajectory of the plastic film.

[0006] Preferably, the driving mechanism includes a support frame, a servo motor, a drive roller, and a pressing mechanism. The support frame is fixedly mounted on a bracket, the servo motor is fixedly mounted on the support frame, and the drive roller is rotatably mounted on the support frame. The power output end of the servo motor is connected to the drive roller. The pressing mechanism is located above the drive roller and has a pressing function. The servo motor has an angle self-locking function. When conveying the plastic film, the plastic film moves to the upper end of the drive roller after passing through the guide roller. Then, the pressing mechanism presses the plastic film onto the upper end of the drive roller. Then, the servo motor is turned on to rotate the drive roller. The rotating drive roller drives the plastic film to the left and moves it to the upper end of the conveyor belt until the part of the plastic film that needs to be cut moves below the slitting mechanism. This facilitates the movement of the plastic film.

[0007] Preferably, the pressing mechanism includes a servo cylinder, a lifting rod, a sliding rod, a mounting plate, and a pressure roller. The servo cylinder is fixedly mounted on the upper end of the support frame. The lifting rod and the sliding rod are both slidably mounted on the support frame. The power output end of the servo cylinder is connected to the upper end of the lifting rod. The mounting plate is fixedly mounted on the lower ends of the lifting rod and the sliding rod. The pressure roller is rotatably mounted on the mounting plate and is located above the drive roller. When the plastic film is conveyed to the left by the rotating drive roller, the servo cylinder is activated, causing the lifting rod to drive the mounting plate to descend. This causes the pressure roller on the mounting plate to descend until it contacts the upper end of the plastic film, pressing the plastic film tightly onto the drive roller. This increases the friction between the drive roller and the plastic film, facilitating the conveying of the plastic film by the drive roller.

[0008] Preferably, the slitting mechanism includes a slitting blade and a lifting mechanism. The slitting blade is located above the conveyor belt, and the lifting mechanism is used to raise and lower the slitting blade. Multiple support rollers are mounted on the belt conveyor, and the conveyor belt is supported by these rollers. When the part of the plastic film to be cut moves from the upper end of the conveyor belt to below the slitting blade, the servo motor stops rotating the drive roller. Then, the plastic film is stretched and flattened by the stretching and shaping mechanism. The lifting mechanism is then opened, causing the slitting blade to descend. During its descent, the slitting blade contacts the plastic film, cutting it. This facilitates the slitting of the plastic film.

[0009] Preferably, the lifting mechanism includes a mounting frame, a hydraulic cylinder A, a push rod, and a moving rod. The hydraulic cylinder A is fixedly mounted on the upper end of the mounting frame, and the push rod and the moving rod are both slidably mounted on the upper part of the mounting frame. The power output end of the hydraulic cylinder A is connected to the upper end of the push rod, and the slitting blade is fixedly mounted on the lower end of the push rod and the moving rod. When the slitting blade is raised or lowered, the hydraulic cylinder A is opened, and the hydraulic cylinder A drives the push rod to rise or fall, thereby raising or lowering the slitting blade. This facilitates the raising and lowering of the slitting blade.

[0010] Preferably, the stretching and shaping mechanism includes a lifting frame, a hydraulic cylinder B, a push rod, a guide rod, a mounting frame, a torque motor, and a rotating roller. The lifting frame is located on the left side of the mounting frame. The hydraulic cylinder B is fixedly installed on the upper end of the lifting frame. The push rod and the guide rod are both slidably installed on the lifting frame. The mounting frame is fixedly installed on the lower end of the guide rod and the push rod. The torque motor is fixedly installed on the mounting frame. The rotating roller is rotatably installed on the mounting frame. The power output end of the torque motor is connected to the rotating roller. The lifting frame is fixedly installed on the support frame of the vehicle frame. When the part of the plastic film to be cut moves below the slitting blade, the left part of the plastic film is located below the rotating roller. Then, the hydraulic cylinder B causes the push rod to drive the mounting frame and the rotating roller to descend, so that the rotating roller presses the plastic film tightly onto the conveyor belt. Then, the torque motor is turned on, so that the torque motor outputs an appropriate torque force to rotate the rotating roller, thereby stretching the plastic film to the left and flattening it, avoiding wrinkles on the plastic film. Then, the plastic film is cut by the slitting mechanism. This facilitates the stretching and shaping of the plastic film.

[0011] Compared with the prior art, the advantages of this utility model are: the plastic film can be stretched and flattened before cutting, which reduces the wrinkles of the plastic film during cutting, ensures the cutting size and cutting quality, and is convenient to use, reliable and practical. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the first isometric structure of this utility model; Figure 2 This is a schematic diagram of the second isometric structure of this utility model; Figure 3 This is a schematic diagram of the stretching and shaping mechanism; Figure 4 This is a schematic diagram of the drive mechanism; Figure 5 This is a schematic diagram of the slitting mechanism.

[0013] The following are labels in the attached diagram: 1. Bracket; 2. Unwind roller; 3. Belt conveyor; 4. Conveyor belt; 5. Fixing frame; 6. Guide roller; 7. Support frame; 8. Servo motor; 9. Drive roller; 10. Servo electric cylinder; 11. Lifting rod; 12. Sliding rod; 13. Mounting plate; 14. Pressure roller; 15. Sliding knife; 16. Mounting frame; 17. Hydraulic cylinder A; 18. Push rod; 19. Moving rod; 20. Lifting frame; 21. Hydraulic cylinder B; 22. Push rod; 23. Guide rod; 24. Mounting frame; 25. Torque motor; 26. Rotating roller; 27. Plastic film. Detailed Implementation

[0014] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete. Example

[0015] like Figures 1 to 5 The plastic packaging bag slitting and shaping device of this utility model includes a support 1, an unwinding roller 2, a belt conveyor 3, a guiding mechanism, a driving mechanism, a slitting mechanism, and a stretching and shaping mechanism. The unwinding roller 2 is rotatably mounted on the upper end of the belt conveyor 3, which is equipped with a conveyor belt 4. The guiding mechanism is located on the left side of the support 1 and has a guiding function. The driving mechanism is mounted on the support 1 and has a driving force output function. The slitting mechanism is located above the conveyor belt 4 and has a slitting function. The stretching and shaping mechanism is located on the left side of the slitting mechanism and has a stretching function. A roll of plastic film 27 is wound on the unwinding roller 2, and the plastic film 27 is a double-layer film. The surface of the conveyor belt 4 is provided with an anti-cutting layer, which can be made of stainless steel fiber blended fabric, glass fiber cloth, or ultra-high molecular weight polyethylene cloth. When slitting the plastic film 27 into plastic bags, the plastic film 27 on the support 1... One end of the plastic film 27 passes through the guiding mechanism and enters the driving mechanism. The driving mechanism then conveys the plastic film 27 to the left, causing it to fall onto the upper end of the conveyor belt 4. The driving mechanism continues to move the plastic film 27 to the left on the upper end of the conveyor belt 4 until the part of the plastic film 27 that needs to be cut moves below the slitting mechanism. At this time, the left end of the plastic film 27 is located below the stretching and shaping mechanism. Then, the stretching and shaping mechanism stretches the left end of the plastic film 27 to the left, flattening the plastic film 27 and preventing wrinkles during slitting. After that, the slitting mechanism cuts the plastic film 27. The cut plastic film 27 is then conveyed by the belt conveyor 3 and the conveyor belt 4 to the sealing mechanism on the outside to be sealed to form a packaging bag. Before cutting the plastic film 27, it can stretch and flatten the plastic film 27, reducing wrinkles during slitting, ensuring the size and quality of the cut, and is convenient to use, reliable and practical.

[0016] The guiding mechanism includes a fixed frame 5 and a guide roller 6. The fixed frame 5 is located on the left side of the bracket 1, and the guide roller 6 is rotatably mounted on the upper end of the fixed frame 5. When conveying the plastic film 27, the plastic film 27 passes through the upper end of the guide roller 6 before entering the drive mechanism, which facilitates the control of the movement trajectory of the plastic film 27.

[0017] like Figure 1 and Figure 4The drive mechanism includes a support frame 7, a servo motor 8, a drive roller 9, and a pressing mechanism. The support frame 7 is fixedly mounted on the bracket 1, the servo motor 8 is fixedly mounted on the support frame 7, and the drive roller 9 is rotatably mounted on the support frame 7. The power output end of the servo motor 8 is connected to the drive roller 9. The pressing mechanism is located above the drive roller 9 and has a pressing function. The servo motor 8 has an angle self-locking function. When conveying the plastic film 27, the plastic film 27 moves to the upper end of the drive roller 9 after passing the guide roller 6. Then, the pressing mechanism presses the plastic film 27 onto the upper end of the drive roller 9. Then, the servo motor 8 is turned on, causing the drive roller 9 to rotate. The rotating drive roller 9 drives the plastic film 27 to move to the upper end of the conveyor belt 4 to the left until the part of the plastic film 27 that needs to be cut moves below the slitting mechanism. This facilitates the movement of the plastic film 27.

[0018] like Figure 1 The pressing mechanism includes a servo cylinder 10, a lifting rod 11, a sliding rod 12, a mounting plate 13, and a pressure roller 14. The servo cylinder 10 is fixedly installed on the upper end of the support frame 7. The lifting rod 11 and the sliding rod 12 are both slidably installed on the support frame 7. The power output end of the servo cylinder 10 is connected to the upper end of the lifting rod 11. The mounting plate 13 is fixedly installed on the lower end of the lifting rod 11 and the sliding rod 12. The pressure roller 14 is rotatably installed on the mounting plate 13 and is located at the upper end of the drive roller 9. When the plastic film 27 is conveyed to the left by the rotating drive roller 9, the servo cylinder 10 is opened, causing the lifting rod 11 to drive the mounting plate 13 to descend, thereby causing the pressure roller 14 on the mounting plate 13 to descend to contact the upper end of the plastic film 27, so that the plastic film 27 is pressed tightly on the drive roller 9, which increases the friction between the drive roller 9 and the plastic film 27 and facilitates the conveying of the plastic film 27 by the drive roller 9.

[0019] like Figure 1 and Figure 5 The slitting mechanism includes a slitting blade 15 and a lifting mechanism. The slitting blade 15 is located above the conveyor belt 4, and the lifting mechanism is used to lift the slitting blade 15. Multiple support rollers are provided on the belt conveyor 3, and the conveyor belt 4 is supported by the multiple support rollers. When the part of the plastic film 27 that needs to be cut moves from the upper end of the conveyor belt 4 to below the slitting blade 15, the servo motor 8 stops rotating the drive roller 9. Then, the plastic film 27 is stretched and flattened by the stretching and shaping mechanism. The lifting mechanism is then opened, causing the slitting blade 15 to descend. During the descent, the slitting blade 15 contacts the plastic film 27, and the plastic film 27 is cut by the slitting blade 15. This facilitates the slitting of the plastic film 27.

[0020] The lifting mechanism includes a mounting frame 16, a hydraulic cylinder A17, a push rod 18, and a moving rod 19. The hydraulic cylinder A17 is fixedly mounted on the upper end of the mounting frame 16. The push rod 18 and the moving rod 19 are both slidably mounted on the upper part of the mounting frame 16. The power output end of the hydraulic cylinder A17 is connected to the upper end of the push rod 18. The slitting blade 15 is fixedly mounted on the lower end of the push rod 18 and the moving rod 19. When the slitting blade 15 is raised or lowered, the hydraulic cylinder A17 is opened, and the hydraulic cylinder A17 drives the push rod 18 to rise or fall, thereby raising or lowering the slitting blade 15. This facilitates the raising and lowering of the slitting blade 15.

[0021] The stretching and shaping mechanism includes a lifting frame 20, a hydraulic cylinder B21, a push rod 22, a guide rod 23, a mounting frame 24, a torque motor 25, and a rotating roller 26. The lifting frame 20 is located on the left side of the mounting frame 16. The hydraulic cylinder B21 is fixedly mounted on the upper end of the lifting frame 20. The push rod 22 and the guide rod 23 are both slidably mounted on the lifting frame 20. The mounting frame 24 is fixedly mounted on the lower ends of the guide rod 23 and the push rod 22. The torque motor 25 is fixedly mounted on the mounting frame 24. The rotating roller 26 is rotatably mounted on the mounting frame 24. The power output end of the torque motor 25 is connected to the rotating roller 26. The lifting frame 20 is fixedly mounted on... On the support frame of the vehicle frame; when the part of the plastic film 27 that needs to be cut moves below the slitting blade 15, the left part of the plastic film 27 is located below the rotating roller 26. Then, the hydraulic cylinder B21 causes the push rod 22 to drive the mounting frame 24 and the rotating roller 26 to descend, so that the rotating roller 26 presses the plastic film 27 tightly onto the conveyor belt 4. Then, the torque motor 25 is turned on, so that the torque motor 25 outputs an appropriate torque force to rotate the rotating roller 26, thereby pulling the plastic film 27 to the left and flattening it, avoiding wrinkles on the plastic film 27. Then, the plastic film 27 is cut by the slitting mechanism, which facilitates the stretching and shaping of the plastic film 27. Example

[0022] Based on Example 1, a rubber layer is provided on the surface of the drive roller 9; through the above provision, the scratches on the plastic film 27 by the drive roller 9 are reduced.

[0023] It should be added that: all electrical equipment in this case is connected to an external controller, which coordinates and controls the operation of each piece of electrical equipment.

[0024] The belt conveyor 3, conveyor belt 4, servo motor 8, servo electric cylinder 10, slitting knife 15, hydraulic cylinder B21, torque motor 25 and rotating roller 26 of the plastic packaging bag slitting and shaping device of this utility model are all purchased from the market. Technical personnel in this industry only need to install and operate it according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0025] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A plastic packaging bag slitting and shaping device, comprising a support (1), an unwinding roller (2), and a belt conveyor (3), wherein the unwinding roller (2) is rotatably mounted on the upper end of the belt conveyor (3), and a conveyor belt (4) is provided on the belt conveyor (3); characterized in that, It also includes a guiding mechanism, a driving mechanism, a slitting mechanism and a stretching and shaping mechanism. The guiding mechanism is located on the left side of the support (1) and has the function of guiding. The driving mechanism is installed on the support (1) and has the function of outputting driving force. The slitting mechanism is located above the conveyor belt (4) and has the function of slitting. The stretching and shaping mechanism is located on the left side of the slitting mechanism and has the function of stretching.

2. The plastic packaging bag cutting and shaping device as described in claim 1, characterized in that, The guiding mechanism includes a fixed frame (5) and a guide roller (6). The fixed frame (5) is located on the left side of the bracket (1), and the guide roller (6) is rotatably mounted on the upper end of the fixed frame (5).

3. The plastic packaging bag cutting and shaping device as described in claim 1, characterized in that, The drive mechanism includes a support frame (7), a servo motor (8), a drive roller (9), and a pressing mechanism. The support frame (7) is fixedly mounted on the bracket (1), the servo motor (8) is fixedly mounted on the support frame (7), the drive roller (9) is rotatably mounted on the support frame (7), the power output end of the servo motor (8) is connected to the drive roller (9), and the pressing mechanism is located above the drive roller (9). The pressing mechanism has the function of pressing down.

4. The plastic packaging bag cutting and shaping device as described in claim 3, characterized in that, The pressing mechanism includes a servo cylinder (10), a lifting rod (11), a sliding rod (12), a mounting plate (13), and a pressure roller (14). The servo cylinder (10) is fixedly installed on the upper end of the support frame (7). The lifting rod (11) and the sliding rod (12) are both slidably installed on the support frame (7). The power output end of the servo cylinder (10) is connected to the upper end of the lifting rod (11). The mounting plate (13) is fixedly installed on the lower end of the lifting rod (11) and the sliding rod (12). The pressure roller (14) is rotatably installed on the mounting plate (13). The pressure roller (14) is located at the upper end of the drive roller (9).

5. The plastic packaging bag cutting and shaping device as described in claim 1, characterized in that, The slitting mechanism includes a slitting blade (15) and a lifting mechanism. The slitting blade (15) is located above the conveyor belt (4), and the lifting mechanism is used to lift the slitting blade (15).

6. The plastic packaging bag cutting and shaping device as described in claim 5, characterized in that, The lifting mechanism includes a mounting frame (16), a hydraulic cylinder A (17), a push rod (18), and a moving rod (19). The hydraulic cylinder A (17) is fixedly mounted on the upper end of the mounting frame (16). The push rod (18) and the moving rod (19) are both slidably mounted on the upper part of the mounting frame (16). The power output end of the hydraulic cylinder A (17) is connected to the upper end of the push rod (18). The slitting blade (15) is fixedly mounted on the lower end of the push rod (18) and the moving rod (19).

7. The plastic packaging bag cutting and shaping device as described in claim 1, characterized in that, The stretching and shaping mechanism includes a hoisting frame (20), a hydraulic cylinder B (21), a push rod (22), a guide rod (23), a mounting frame (24), a torque motor (25), and a rotating roller (26). The hoisting frame (20) is located on the left side of the mounting frame (16). The hydraulic cylinder B (21) is fixedly installed on the upper end of the hoisting frame (20). The push rod (22) and the guide rod (23) are both slidably installed on the hoisting frame (20). The mounting frame (24) is fixedly installed on the lower end of the guide rod (23) and the push rod (22). The torque motor (25) is fixedly installed on the mounting frame (24). The rotating roller (26) is rotatably installed on the mounting frame (24). The power output end of the torque motor (25) is connected to the rotating roller (26).

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