Automatic roll changing mechanism of film blowing machine

Abstract

The invention relates to the technical field of film blowing machines, in particular to an automatic roll changing mechanism of a film blowing machine, a transmission device comprises a fixed frame arranged on the rolling side of a machine frame, a U-shaped movable frame is fixedly installed on the fixed frame, movable air cylinders are arranged on the two sides of the U-shaped movable frame, a truss for installing a grabbing device is arranged between the movable air cylinders, and the grabbing device is arranged on the truss. A guide structure for limiting and guiding the grabbing device is further arranged between the truss and the grabbing device, the grabbing device is driven by moving air cylinders on the two sides of the U-shaped moving frame to move in the axial direction, the grabbing device can accurately reach the preset position in the axial moving process, the guide structure can limit shaking of the grabbing device, and therefore the grabbing effect is improved. And the wind-up roller is prevented from falling off, and the safety and stability in the transportation process are greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of film blowing machines, and in particular to an automatic roll changing mechanism of a film blowing machine. Background Art

[0002] The film blowing machine heats and melts plastic particles and then blows them into bubble film. The cylindrical bubble film is cooled, folded, printed, plastic-sealed, and punched to form packaging bags. Since the thickness of the cylindrical bubble film extruded from the blow molding machine die is uneven at each point, thickness deviation occurs. The upper rotating mechanism can ensure the uniform thickness of the film roll after winding, thereby improving the winding quality.

[0003] The patent document with patent application number CN117303062A discloses a fully automatic film winder, which realizes automatic transmission of the winding roller after winding is completed by setting multiple support cylinders and supports, which is convenient for unloading and transportation. The winding roller and the spare winding roller are automatically switched by the set transmission device and grasping device. However, the roll changing device of this technology adopts synchronous wheels for transmission, and the position of the manipulator cannot be accurately controlled by using synchronous wheels for transmission. At the same time, the lifting cylinder of this technology has no guide device, and it is easy to offset during the grasping process of the manipulator, resulting in the offset of the grasping position. At the same time, the winding roller will shake during the transportation of the manipulator, and it will fall during transportation. Therefore, this technology still has a certain room for modification. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an automatic roll changing mechanism for a film blowing machine in view of the above-mentioned deficiencies in the prior art, which is convenient for film threading and adjustment to adapt to cylindrical bubble films of different sizes.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an automatic roll-changing mechanism of a film blowing machine, comprising a mounting frame, the frame being provided with a die roller assembly and a roller in sequence along the film conveying direction, the frame being provided with a winding roller on one side of the roller, the frame being provided with a gripping device capable of gripping the winding roller above the winding roller, and a transmission device driving the gripping device to move axially, characterized in that: the transmission device comprises a fixed frame provided on one side of the winding frame, the fixed frame being fixedly provided with a U-shaped movable frame, movable cylinders being provided on both sides of the U-shaped movable frame, a truss for mounting the gripping device being provided between the movable cylinders, and a guide structure for limiting and guiding the gripping device being provided between the truss and the gripping device.

[0006] The present invention with the above-mentioned characteristics: the axial movement of the grabbing device is driven by the moving cylinders on both sides of the U-shaped moving frame, and the moving cylinders can accurately control the moving speed, distance and position of the grabbing device, so that the grabbing device can accurately reach the predetermined position during the axial movement, effectively avoiding the problem of manipulator position deviation caused by inaccurate transmission, and improving the accuracy and reliability of the roll changing operation. The guide structure arranged between the truss and the grabbing device provides a good limiting and guiding effect for the grabbing device. In the process of the manipulator grabbing the winding roller, the guide structure can ensure that the grabbing device is lifted and lowered vertically and stably to avoid offset, and when transporting the winding roller, the guide structure can limit the shaking of the grabbing device to prevent the winding roller from falling, greatly improving the safety and stability of the transportation process.

[0007] A further configuration of the present invention is that the grasping device includes a plurality of grasping cylinders vertically installed at the bottom of the truss, the grasping cylinders include a cylinder body and a telescopic rod connected to the cylinder body, and the end of the telescopic rod is provided with a mechanical claw capable of grasping.

[0008] The present invention has the above characteristics: the grabbing device is composed of a grabbing cylinder and a mechanical claw vertically installed at the bottom of the truss. The grabbing device is driven 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 arrangement of the present invention is: the guide structure includes several U-shaped mounting plates vertically installed at the bottom of the truss, and an installation cavity for fixed installation of the cylinder body is provided between the U-shaped mounting plates, the telescopic rod is passed through the installation cavity and fixedly connected to the mechanical claw, a guide rail is provided on one side of the U-shaped mounting plate, and a sliding block is slidingly provided on the guide rail, and an L-shaped mounting plate for installation of the mechanical claw is fixedly installed on one side of the sliding block, the sliding block is provided 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 has the above-mentioned characteristics: the installation cavity formed by the U-shaped mounting plate provides a stable installation space for the cylinder body, and the telescopic rod passes through the installation cavity and is connected to the mechanical claw, further enhancing the stability of the mechanical claw's grasping action, so that the mechanical claw can accurately grasp the winding roller, and the slide rail provides a sliding path for the sliding block, so that the mechanical claw can move along a fixed track during the up and down movement, effectively preventing deviation and shaking.

[0011] A further configuration of the present invention is: the mechanical claw includes a claw cylinder fixedly installed on the horizontal plane of the L-shaped mounting plate, a claw connecting plate is provided at the bottom of the claw cylinder, and both sides of the claw connecting plate are provided with hinge cavities for the claw to be hinged, the claw includes a clamping part for clamping the winding roller and a hinge part hinged to the hinge cavity, the clamping part is fixedly installed on one side of the hinge part, the hinge part and the hinge part are both provided with hinge holes, and a hinge shaft is passed through the hinge hole.

[0012] The present invention has the above-mentioned characteristics: 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 arranged at the bottom of the gripper cylinder provides a connection basis for the installation of the gripper; the hinged cavities opened on both sides of the gripper connecting plate cooperate with the hinged part and the hinged shaft of the gripper, so that the gripper can realize the opening and closing action when clamping the winding roller.

[0013] A further configuration of the present invention is that a lifting assembly is provided between the winding roller and the frame.

[0014] The present invention has the above-mentioned characteristics: a lifting component is arranged between the winding roller and the frame, and the lifting component can enable the winding roller to flexibly adjust the height position according to needs. During the roll changing process, the winding roller can be accurately moved to the appropriate position, making it convenient for the grabbing device to accurately grab the winding roller.

[0015] A further configuration of the present invention is that the lifting assembly includes two lifting cylinders installed in the frame and a hook member arranged at the output end of the lifting cylinder. The output end of the lifting cylinder is arranged upward, one end of the hook member is fixedly connected to the lifting cylinder, and the other end extends toward the direction of the roller to form a hook portion for placing the spare winding shaft.

[0016] The present invention has the above characteristics: the output ends of the two lifting cylinders installed in the frame are set upward to provide drive for the entire lifting assembly, and the hook portion formed by the other end of the hook member extending toward the drum is specifically used for placing the spare winding shaft.

[0017] A further configuration of the present invention is that the movable cylinder is a rodless cylinder.

[0018] The present invention with the above characteristics: the rodless cylinder has higher positioning accuracy than the ordinary cylinder, ensuring that the mechanical claw accurately grasps the winding roller, avoiding the winding roller falling or loose grasping due to inaccurate positioning, and improving the reliability and stability of the roll changing operation.

[0019] The beneficial effects of the present invention are as follows: the moving cylinders on both sides of the U-shaped moving frame are used to drive the grabbing device to move axially, so that the grabbing device can accurately reach the predetermined position during the axial movement process. The guide structure can limit the shaking of the grabbing device and prevent the winding roller from falling, thereby greatly improving the safety and stability of the transportation process.

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the structure of an embodiment of the present invention.

[0022] Figure 2 Schematic diagram of the structure of a transmission device according to an embodiment of the present invention.

[0023] Figure 3 Schematic diagram of the structure of the grabbing device according to an embodiment of the present invention.

[0024] Figure 4 Schematic diagram of the structure of the mechanical claw according to an embodiment of the present invention.

[0025] Figure 5 Schematic diagram of the structure of the lifting assembly according to an embodiment of the present invention.

[0026] Label notes: 1-frame, 2-die roller assembly, 3-roller, 4-winding roller, 5-grabbing device, 6-transmission device, 7-fixed frame, 8-U-shaped movable frame, 9-moving cylinder, 10-truss, 11-guide structure, 12-grabbing 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-clamping cylinder, 23-clamping claw connecting plate, 24-clamping claw, 25-hinge cavity, 26-clamping part, 27-hinge part, 28-hinge hole, 29-hinge shaft, 30-lifting assembly, 31-lifting cylinder, 32-hook piece. DETAILED DESCRIPTION

[0027] This specific embodiment is merely an explanation of the present invention and is not intended to limit the present invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed. However, as long as such modifications are within the scope of the claims of the present invention, 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 film blowing machine, comprising a mounting frame, a frame 1 provided with a die roller assembly 2 and a roller 3 in sequence along the film conveying direction, a winding roller 4 provided on one side of the roller 3 of the frame 1, a gripping device 5 capable of gripping the winding roller 4 provided above the winding roller 4, and a transmission device 6 for driving the gripping device 5 to move axially, the transmission device 6 comprising a fixed frame 7 provided on one side of the winding side of the frame 1, a U-shaped movable frame 8 fixedly installed on the fixed frame 7, movable cylinders 9 provided on both sides of the U-shaped movable frame 8, a truss 10 for mounting the gripping device 5 provided between the movable cylinders 9, a guide structure 11 for limiting and guiding the gripping device 5 is further provided between the truss 10 and the gripping device 5, the gripping device 5 is driven to move axially by the movable cylinders 9 on both sides of the U-shaped movable frame 8, the movable cylinders 9 can accurately control the moving speed, distance and position of the gripping device 5, so that the gripping device 5 can move axially. The guide structure 11 is provided between the truss 10 and the gripping device 5, which provides a good limiting and guiding effect for the gripping device 5. In the process of the manipulator grabbing the winding roller 4, the guide structure 11 can ensure that the gripping device 5 is lifted and lowered vertically and stably to avoid deviation. Moreover, when transporting the winding roller 4, the guide structure 11 can limit the shaking of the gripping device 5 and prevent the winding roller 4 from falling, which greatly improves the safety and stability of the transportation process. The gripping device 5 includes a plurality of 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 that can be used for gripping. The gripping device 5 is composed of the gripping cylinder 12 and the mechanical claw 15 vertically installed at the bottom of the truss 10. The mobile cylinders 9 on both sides of the U-shaped mobile frame drive the grasping device 5 to move axially, so that the mechanical claw 15 can accurately replace the winding roller 4. The guide structure 11 includes a plurality of U-shaped mounting plates 16 vertically installed at the bottom of the truss 10. A mounting cavity 18 for fixing the cylinder body 13 is provided between the U-shaped mounting plates 16. The telescopic rod 14 is passed 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. The guide rail 19 is slidably provided with a sliding block 20. A sliding block 20 is fixedly installed on one side of the sliding block 20 for the mechanical claw 15 to be installed. The L-shaped mounting plate 21 and the sliding block 20 are arranged on the vertical surface of the L-shaped mounting plate 21. The mechanical claw 15 is fixedly installed 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 installation space for the cylinder body 13. The telescopic rod 14 passes through the mounting cavity 18 and is connected to the mechanical claw 15, further enhancing the stability of the grasping action of the mechanical claw 15, so that the mechanical claw 15 can accurately grasp the winding roller 4. The slide rail provides a sliding path for the sliding block 20, so that the mechanical claw 15 can move along a fixed track during the up and down movement.Effectively prevents deviation and shaking, the mechanical claw 15 includes a clamping claw 24 cylinder 22 fixedly installed on the horizontal plane of the L-shaped mounting plate 21, a clamping claw 24 connecting plate 23 is provided at the bottom of the clamping claw 24 cylinder 22, and both sides of the clamping claw 24 connecting plate 23 are provided with an articulation cavity 25 for the clamping claw 24 to be hinged, the clamping claw 24 includes a clamping portion 26 for clamping the winding roller 4 and an articulation portion 27 articulated with the articulation cavity 25, the clamping portion 26 is fixedly installed on one side of the articulation portion 27, the articulation portion 27 and the articulation portion 27 are both provided with an articulation hole 28, and an articulation shaft 29 is passed through the articulation hole 28, the clamping claw 24 cylinder 22 and the L The shaped mounting plate is fixed to the horizontal surface to ensure the stability of the mechanical claw 15 during operation. The claw 24 connecting plate 23 provided at the bottom of the claw 24 cylinder 22 provides a connection base for the installation of the claw 24. The hinge chambers 25 opened on both sides of the claw 24 connecting plate 23 cooperate with the hinge part 27 and hinge shaft 29 of the claw 24 to enable the claw 24 to open and close when clamping the winding roller 4.

[0029] like Figure 1-5 The present invention provides the following technical solutions: an automatic roll-changing mechanism for a film blowing machine; a lifting assembly 30 is provided between the winding roller 4 and the frame 1; a lifting assembly 30 is provided between the winding roller 4 and the frame 1; the lifting assembly 30 enables the winding roller 4 to flexibly adjust its height position as needed; during the roll-changing process, the winding roller 4 can be accurately moved to a suitable position, so that the grabbing device 5 can accurately grab the winding roller 4; the lifting assembly 30 includes two lifting cylinders 31 installed in the frame 1 and a hook member 32 provided at the output end of the lifting cylinder 31; the output end of the lifting cylinder 31 is arranged upward, and one end of the hook member 32 is connected to the lifting cylinder 31; The cylinder 31 is fixedly connected, and the other end extends toward the drum 3 to form a hook 17 for placing a spare winding shaft. The output ends of the two lifting cylinders 31 installed in the frame 1 are set upward, providing drive for the entire lifting assembly 30. The hook 17 formed by the other end of the hook member 32 extends toward the drum 3, which is specifically used to place the spare winding shaft. The mobile cylinder 9 is a rodless cylinder. Compared with ordinary cylinders, the rodless cylinder has higher positioning accuracy, ensuring that the mechanical claw 15 accurately grasps the winding roller 4, avoiding the winding roller 4 from falling or loosely grasping due to inaccurate positioning, thereby improving the reliability and stability of the roll changing operation.

[0030] The beneficial effects of the present invention are as follows: the moving cylinders 9 on both sides of the U-shaped moving frame 8 are used to drive the grabbing device 5 to move axially, so that the grabbing device 5 can accurately reach the predetermined position during the axial movement process, and the guide structure 11 can limit the shaking of the grabbing device 5 and prevent the winding roller 4 from falling, thereby greatly improving the safety and stability of the transportation process.

Claims

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

2. The automatic roll-changing mechanism of the film blowing machine according to claim 2, characterized in that: The grabbing device includes a plurality of grabbing cylinders vertically installed at the bottom of the truss. The grabbing cylinders include 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 grabbing.

3. The automatic roll-changing mechanism of the film blowing machine according to claim 3, characterized in that: The guide structure includes several U-shaped mounting plates vertically installed at the bottom of the truss, and a mounting cavity for fixedly installing the cylinder body is provided between the U-shaped mounting plates. The telescopic rod is passed through the mounting cavity and fixedly connected to the mechanical claw. A guide rail is provided on one side of the U-shaped mounting plate, and a sliding block is slidingly provided on the guide rail. An L-shaped mounting plate for installing the mechanical claw is fixedly installed on one side of the sliding block. The sliding block is provided 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.

4. The automatic roll-changing mechanism of a film blowing machine according to any one of claims 1 to 3, characterized in that: The mechanical claw includes a claw cylinder fixedly installed on the horizontal plane of the L-shaped mounting plate, a claw connecting plate is provided at the bottom of the claw cylinder, and hinge cavities for the claw to be hinged are provided on both sides of the claw connecting plate. The claw includes a clamping part for clamping the winding roller and a hinge part hinged to the hinge cavity, the clamping part is fixedly installed on one side of the hinge part, and the hinge part and the hinge part are both provided with hinge holes, and a hinge shaft is passed through the hinge hole.

5. The automatic roll-changing mechanism of the film blowing machine according to claim 4, characterized in that: A lifting component is provided between the winding roller and the frame.

6. The automatic roll-changing mechanism of the film blowing machine according to claim 5, characterized in that: The lifting assembly includes two lifting cylinders installed in the frame and a hook member arranged at the output end of the lifting cylinder. The output end of the lifting cylinder is set upward. One end of the hook member is fixedly connected to the lifting cylinder, and the other end extends toward the drum to form a hook for placing the spare winding shaft.

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

Images