Automatic roll changing mechanism of a film blowing machine

Abstract

The utility model relates to the technical field of film blowing machine, especially a kind of automatic roll changing mechanism of film blowing machine, transmission device includes the fixed frame of the rack located the winding roll one side setting, the fixed frame is fixedly installed with U-shaped moving frame, the U-shaped moving frame both sides are equipped with moving cylinder, truss for the installation of grabbing device is equipped between the moving cylinder, the truss and grabbing device between still be equipped with the guiding structure that the grabbing device is limited and guided, the grabbing device axial movement is driven by the moving cylinder of U-shaped moving frame both sides, so that grabbing device can accurately reach predetermined position in the axial movement process, guiding structure can limit the shaking of grabbing device, prevent winding roll from falling, greatly improve the security and stability of transport process.

Description

Technical Field

[0001] This utility model relates to the field of blown film machine technology, and specifically to an automatic roll changing mechanism for a blown film machine. Background Technology

[0002] A blown film machine heats and melts plastic particles and then blows them into a thin bubble film. The cylindrical bubble film is cooled, folded, printed, sealed, and punched to form a packaging bag. Because the cylindrical bubble film extruded from the die of the blow molding machine has uneven thickness at each point, it produces thickness deviation. The upper rotating mechanism can ensure that the thickness of the film roll after winding is uniform, thus improving the winding quality.

[0003] Patent application CN117303062A discloses a fully automatic film winding machine. This machine uses multiple support cylinders and supports to automatically transfer the winding roller after winding, facilitating unloading and handling. It also uses a conveying device and a gripping device to automatically switch between the winding roller and a spare winding roller. However, this technology uses synchronous pulleys for transmission, which makes it difficult to precisely control the position of the robotic arm. Furthermore, the lifting cylinder lacks a guide device, making it prone to deviation during the robotic arm's gripping process, leading to positional shifts. Additionally, the winding roller may shake during transport, potentially falling off. Therefore, this technology still has room for improvement. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide an automatic roll changing mechanism for a blown film machine, which is convenient for film feeding and easy to adjust to adapt to cylindrical bubble films of different sizes, in order to address the shortcomings of the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an automatic roll-changing mechanism for a blown film machine, comprising a mounting frame, wherein a pressing roller assembly and a roller are sequentially arranged along the film conveying direction on the frame, a take-up roller is provided on one side of the roller on the frame, a gripping device capable of gripping the take-up roller is provided above the take-up roller on the frame, and a transmission device for driving the gripping device to move axially, characterized in that: the transmission device includes a fixed frame provided on one side of the take-up roller on the frame, a U-shaped movable frame is fixedly installed on the fixed frame, movable cylinders are provided on both sides of the U-shaped movable frame, a truss for mounting the gripping device is provided between the movable cylinders, and a guide structure for limiting and guiding the gripping device is also provided between the truss and the gripping device.

[0006] The present invention, possessing the above-mentioned features, uses movable cylinders on both sides of the U-shaped moving frame to drive the gripping device to move axially. These movable cylinders precisely control the moving speed, distance, and position of the gripping device, ensuring it accurately reaches the predetermined position during axial movement. This effectively avoids positional deviations in the robotic arm caused by inaccurate transmission, improving the accuracy and reliability of the roll-changing operation. The guide structure between the truss and the gripping device provides excellent limiting and guiding for the gripping device. During the robotic arm's gripping of the take-up roll, the guide structure ensures the gripping device's vertical and stable lifting and lowering, preventing deviation. Furthermore, during the transport of the take-up roll, the guide structure limits the gripping device's swaying, preventing the take-up roll from falling, greatly improving the safety and stability of the transport process.

[0007] A further feature of this invention is that the gripping device includes several gripping cylinders vertically installed at the bottom of the truss. Each gripping cylinder includes a cylinder body and a telescopic rod connected to the cylinder body. The end of the telescopic rod is provided with a mechanical claw capable of gripping.

[0008] The present invention, which has the above-mentioned features, consists of a gripping cylinder and a mechanical claw vertically installed at the bottom of the truss. The gripping device is driven to move axially by the moving cylinders on both sides of the U-shaped moving frame, so that the mechanical claw can accurately replace the winding roller.

[0009] A further feature of this invention is that the guide structure includes several U-shaped mounting plates vertically installed at the bottom of the truss. A mounting cavity for the fixed installation of the cylinder body is provided between the U-shaped mounting plates. The telescopic rod passes through the mounting cavity and is fixedly connected to the mechanical claw. A guide rail is provided on one side of each U-shaped mounting plate, and a sliding block is slidably mounted on the guide rail. An L-shaped mounting plate for the mechanical claw is fixedly installed on one side of the sliding block. The sliding block is located on the vertical surface of the L-shaped mounting plate, and the mechanical claw is fixedly installed on the horizontal surface of the L-shaped mounting plate.

[0010] The present invention, which has the above features, provides a stable mounting space for the cylinder body by forming a mounting cavity with a U-shaped mounting plate. The telescopic rod passes through the mounting cavity and is connected to the mechanical claw, which further enhances the stability of the mechanical claw's gripping action, enabling the mechanical claw to accurately grip the take-up roller. The slide rail provides a sliding path for the sliding block, allowing the mechanical claw to move along a fixed trajectory during up and down movement, effectively preventing deviation and shaking.

[0011] A further feature of this invention is that the mechanical gripper includes a gripper cylinder fixedly mounted to the horizontal plane of the L-shaped mounting plate. The bottom of the gripper cylinder is provided with a gripper connecting plate. Both sides of the gripper connecting plate are provided with hinge cavities for the gripper to hinge. The gripper includes a gripping part for gripping the take-up roller and a hinge part that is hinged to the hinge cavity. The gripping part is fixedly mounted on one side of the hinge part. Both the hinge part and the hinge part are provided with hinge holes, and a hinge shaft passes through the hinge holes.

[0012] The present invention, which has the above features, has the following features: the gripper cylinder is fixedly installed on the horizontal plane of the L-shaped mounting plate to ensure the stability of the mechanical gripper during operation; the gripper connecting plate at the bottom of the gripper cylinder provides a connection base for the installation of the gripper; the hinge cavities opened on both sides of the gripper connecting plate, together with the hinge part and hinge shaft of the gripper, enable the gripper to open and close when gripping the take-up roller.

[0013] A further feature of this invention is that a lifting assembly is provided between the take-up roller and the frame.

[0014] The present invention, which has the above features, has a lifting assembly between the take-up roller and the frame. The lifting assembly allows the take-up roller to be flexibly adjusted in height as needed. During the roll changing process, the take-up roller can be precisely moved to a suitable position, which facilitates the gripping device to accurately grip the take-up roller.

[0015] A further feature of this invention is that the lifting assembly includes two lifting cylinders installed in the frame and a hook component disposed at the output end of the lifting cylinders. The output end of the lifting cylinders is positioned upwards. One end of the hook component is fixedly connected to the lifting cylinders, and the other end extends toward the roller to form a hook portion for placing a spare take-up shaft.

[0016] The present invention having the above features: two lifting cylinders installed in the frame with their output ends facing upwards provide drive for the entire lifting assembly; the other end of the hook extends toward the roller to form a hook portion, which is specifically used to hold a spare take-up shaft.

[0017] A further feature of this invention is that the movable cylinder is a rodless cylinder.

[0018] The present invention, which has the above-mentioned features, has a rodless cylinder with higher positioning accuracy compared with ordinary cylinders, ensuring that the mechanical claw accurately grasps the take-up roller, avoiding the situation where the take-up roller falls or is not firmly grasped due to inaccurate positioning, and improving the reliability and stability of the roll changing operation.

[0019] The beneficial effects of this utility model are as follows: the gripping device is driven to move axially by the moving cylinders on both sides of the U-shaped moving frame, so that the gripping device can accurately reach the predetermined position during the axial movement. The guide structure can limit the shaking of the gripping device and prevent the winding roller from falling off, which greatly improves the safety and stability of the transportation process.

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0022] Figure 2 This is a schematic diagram of the transmission device according to an embodiment of the present invention.

[0023] Figure 3 This is a schematic diagram of the gripping device according to an embodiment of the present invention.

[0024] Figure 4 This is a schematic diagram of the mechanical claw in an embodiment of the present invention.

[0025] Figure 5 This is a schematic diagram of the lifting assembly in an embodiment of the present invention.

[0026] Labeling notes: 1-Frame, 2-Pressure roller assembly, 3-Roller, 4-Take-up roller, 5-Gripping device, 6-Transmission device, 7-Fixed frame, 8-U-shaped moving frame, 9-Moving cylinder, 10-Truss, 11-Guide structure, 12-Gripping cylinder, 13-Cylinder body, 14-Telescopic rod, 15-Mechanical claw, 16-U-shaped mounting plate, 17-Hook, 18-Mounting cavity, 19-Guide rail, 20-Sliding block, 21-L-shaped mounting plate, 22-Gripper cylinder, 23-Gripper connecting plate, 24-Gripper, 25-Hinge cavity, 26-Clamping part, 27-Hinge part, 28-Hinge hole, 29-Hinge shaft, 30-Lifting assembly, 31-Lifting cylinder, 32-Hook component. Detailed Implementation

[0027] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0028] like Figure 1-4The present invention provides the following technical solution: an automatic roll-changing mechanism for a blown film machine, including a mounting frame, a frame 1 having a pressing roller assembly 2 and a roller 3 arranged sequentially along the film conveying direction, a take-up roller 4 located on one side of the roller 3 on the frame 1, a gripping device 5 capable of gripping the take-up roller 4 located above the take-up roller 4 on the frame 1, and a transmission device 6 for driving the gripping device 5 to move axially. The transmission device 6 includes a fixed frame 7 located on one side of the take-up roller on the frame 1, a U-shaped moving frame 8 fixedly mounted on the fixed frame 7, moving cylinders 9 on both sides of the U-shaped moving frame 8, a truss 10 for mounting the gripping device 5 between the moving cylinders 9, and a guide structure 11 for limiting and guiding the gripping device 5 between the truss 10 and the gripping device 5. The gripping device 5 is driven to move axially by the moving cylinders 9 on both sides of the U-shaped moving frame 8. The moving cylinders 9 can precisely control the moving speed, distance, and position of the gripping device 5, so that the gripping device 5 moves axially. During the process, it can accurately reach the predetermined position, effectively avoiding the position deviation problem of the robot arm caused by inaccurate transmission, and improving the accuracy and reliability of the roll changing operation. The guide structure 11 set between the truss 10 and the gripping device 5 provides a good limiting and guiding function for the gripping device 5. During the process of the robot arm gripping the take-up roller 4, the guide structure 11 can ensure that the gripping device 5 rises and falls vertically and stably, avoiding deviation. Moreover, when transporting the take-up roller 4, the guide structure 11 can limit the shaking of the gripping device 5 and prevent the take-up roller 4 from falling, which greatly improves the safety and stability of the transportation process. The gripping device 5 includes several gripping cylinders 12 vertically installed at the bottom of the truss 10. The gripping cylinder 12 includes a cylinder body 13 and a telescopic rod 14 connected to the cylinder body 13. The end of the telescopic rod 14 is provided with a mechanical claw 15 capable of gripping. The gripping device 5 is composed of gripping cylinders 12 and mechanical claws 15 vertically installed at the bottom of the truss 10. The moving cylinders 9 on both sides of the movable frame drive the gripping device 5 to move axially, enabling the mechanical claw 15 to accurately replace the take-up roller 4. The guide structure 11 includes several U-shaped mounting plates 16 vertically installed at the bottom of the truss 10. Mounting cavities 18 are provided between the U-shaped mounting plates 16 for the fixed installation of the cylinder body 13. The telescopic rod 14 passes through the mounting cavity 18 and is fixedly connected to the mechanical claw 15. A guide rail 19 is provided on one side of the U-shaped mounting plate 16, and a sliding block 20 is slidably mounted on the guide rail 19. A mounting bracket for the mechanical claw 15 is fixedly installed on one side of the sliding block 20. The L-shaped mounting plate 21 has a sliding block 20 positioned on its vertical surface. The mechanical gripper 15 is fixedly mounted on the horizontal surface of the L-shaped mounting plate 21. The mounting cavity 18 formed by the U-shaped mounting plate 16 provides a stable mounting space for the cylinder body 13. The telescopic rod 14 passes through the mounting cavity 18 and connects to the mechanical gripper 15, further enhancing the stability of the mechanical gripper 15's gripping action and enabling it to accurately grasp the take-up roller 4. The slide rail provides a sliding path for the sliding block 20, allowing the mechanical gripper 15 to move along a fixed trajectory during its up-and-down movement.Effectively preventing deviation and wobbling, the mechanical gripper 15 includes a gripper 24 cylinder 22 fixedly mounted to the horizontal plane of the L-shaped mounting plate 21. A gripper 24 connecting plate 23 is provided at the bottom of the gripper 24 cylinder 22. Both sides of the gripper 24 connecting plate 23 have hinge cavities 25 for the gripper 24 to hinge. The gripper 24 includes a gripping part 26 for gripping the take-up roller 4 and a hinge part 27 hinged to the hinge cavity 25. The gripping part 26 is fixedly mounted on one side of the hinge part 27. Both the hinge part 27 and the hinge part 27 have hinge holes 28, and a hinge shaft 29 passes through the hinge hole 28. The gripper 24 cylinder 22 and the L-shaped mounting plate 21... The mounting plate is fixed horizontally to ensure the stability of the mechanical gripper 15 during operation. The gripper 24 connecting plate 23 at the bottom of the cylinder 22 provides a connection base for the gripper 24. The hinge cavities 25 on both sides of the connecting plate 23, in conjunction with the hinge portion 27 and hinge shaft 29 of the gripper 24, enable the gripper 24 to open and close when gripping the take-up roller 4.

[0029] like Figure 1-5 The present invention provides the following technical solution: an automatic roll changing mechanism for a blown film machine. A lifting assembly 30 is provided between the take-up roller 4 and the frame 1. The lifting assembly 30 allows the take-up roller 4 to flexibly adjust its height position as needed. During the roll changing process, the take-up roller 4 can be precisely moved to a suitable position, facilitating accurate gripping of the take-up roller 4 by the gripping device 5. The lifting assembly 30 includes two lifting cylinders 31 installed in the frame 1 and a hook 32 disposed at the output end of the lifting cylinders 31. The output end of the lifting cylinders 31 is upward, and one end of the hook 32 is connected to the lifting cylinder. The cylinder 31 is fixedly connected, and the other end extends toward the roller 3 to form a hook 17 for placing the spare take-up shaft. The output ends of the two lifting cylinders 31 installed in the frame 1 are set upwards to provide drive for the entire lifting assembly 30. The hook 17 formed by the other end of the hook 32 extending toward the roller 3 is specifically used to place the spare take-up shaft. The moving cylinder 9 is a rodless cylinder. Compared with ordinary cylinders, rodless cylinders have higher positioning accuracy, ensuring that the mechanical claw 15 accurately grasps the take-up roller 4, avoiding the situation where the take-up roller 4 falls or is not firmly grasped due to inaccurate positioning, thus improving the reliability and stability of the roll changing operation.

[0030] The beneficial effects of this utility model are as follows: the gripping device 5 is driven to move axially by the moving cylinders 9 on both sides of the U-shaped moving frame 8, so that the gripping device 5 can accurately reach the predetermined position during the axial movement. The guide structure 11 can limit the shaking of the gripping device 5 and prevent the winding roller 4 from falling off, which greatly improves the safety and stability of the transportation process.

Claims

1. An automatic roll-changing mechanism for a blown film machine, comprising a frame, wherein a pressing roller assembly and a roller are sequentially arranged along the film conveying direction on the frame, a take-up roller is arranged on one side of the roller on the frame, a gripping device capable of gripping the take-up roller is arranged above the take-up roller on the frame, and a transmission device for driving the gripping device to move axially, characterized in that: The transmission device includes a fixed frame located on one side of the winding head, a U-shaped movable frame fixedly installed on the fixed frame, movable cylinders on both sides of the U-shaped movable frame, a truss for mounting the gripping device between the movable cylinders, and a guide structure for limiting and guiding the gripping device between the truss and the gripping device.

2. The automatic roll changing mechanism of a blown film machine according to claim 1, characterized in that: The gripping device includes several gripping cylinders vertically installed at the bottom of the truss. Each gripping cylinder includes a cylinder body and a telescopic rod connected to the cylinder body. The end of the telescopic rod is provided with a mechanical claw capable of gripping.

3. The automatic roll changing mechanism of a blown film machine according to claim 2, characterized in that: The guide structure includes several U-shaped mounting plates vertically installed at the bottom of the truss. The U-shaped mounting plates are provided with mounting cavities for the fixed installation of the cylinder body. The telescopic rod passes through the mounting cavity and is fixedly connected to the mechanical claw. A guide rail is provided on one side of the U-shaped mounting plate. A sliding block is slidably provided on the guide rail. An L-shaped mounting plate for the mechanical claw is fixedly installed on one side of the sliding block. The sliding block is located on the vertical surface of the L-shaped mounting plate. The mechanical claw is fixedly installed on the horizontal surface of the L-shaped mounting plate.

4. The automatic roll changing mechanism of a blown film machine according to claim 2, characterized in that: The mechanical gripper includes a gripper cylinder fixedly mounted to the horizontal plane of the L-shaped mounting plate. The bottom of the gripper cylinder is provided with a gripper connecting plate. Both sides of the gripper connecting plate are provided with hinge cavities for the gripper to hinge. The gripper includes a gripping part for gripping the take-up roller and a hinge part that is hinged to the hinge cavity. The gripping part is fixedly mounted on one side of the hinge part. Both the hinge part and the hinge part are provided with hinge holes, and a hinge shaft passes through the hinge holes.

5. The automatic roll changing mechanism of a blown film machine according to claim 4, characterized in that: A lifting assembly is provided between the take-up roller and the frame.

6. The automatic roll changing mechanism of a blown film machine according to claim 5, characterized in that: The lifting assembly includes two lifting cylinders installed in the frame and a hook component disposed at the output end of the lifting cylinders. The output end of the lifting cylinder is arranged facing upward. One end of the hook component is fixedly connected to the lifting cylinder, and the other end extends towards the roller to form a hook portion for placing a spare take-up shaft.

7. An automatic roll-changing mechanism for a blown film machine according to any one of claims 1-3, characterized in that: The movable cylinder is a rodless cylinder.

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