A mylar sheet self-adaptive blanking device

Abstract

The utility model provides a kind of mylar sheet self-adapting blanking equipment, including rotatable downstream mylar sheet blanking material roller;Constantly pressurized counterweight roller group is applied to mylar sheet material band by its gravity, including parallel to the rotation shaft of the material roller setting and rotating around its axial rotation and with rotation shaft center axis as rotation axis and two free ends are connected to the U-shaped swing arm of rotation shaft;And, angle sensor is connected to the one end of the rotation shaft length direction and speed reducer is connected to the one end of the material roller length direction.The application, the consumption speed and blanking speed of material band are reflected by the change of tension on material band, then it is converted into the specific rotation angle of rotation shaft by U-shaped swing arm, finally, according to angle sensor, mechanical angle change is accurately converted into electric signal, and it is cooperated between speed reducer, the rotation speed of material roller is controlled, and closed-loop control mechanism to the blanking speed of material roller is formed.

Description

Technical Field

[0001] This utility model relates to the technical field of mylar tablet production and preparation, and in particular to a mylar tablet adaptive feeding device. Background Technology

[0002] Mylar film (PET polyester film) is produced by heating dimethyl terephthalate and ethylene glycol with the aid of a catalyst, followed by transesterification and vacuum polycondensation, and then biaxial stretching. In the industrial production of Mylar film, feeding is a crucial step connecting with subsequent processing steps such as cutting and laminating. The stability and adaptability of the feeding equipment directly affect overall production efficiency and product quality. Too slow a feeding speed will result in excessive tension on the Mylar film, keeping it constantly taut, potentially leading to breakage or internal tearing. Conversely, too fast a feeding speed will cause the material to accumulate on the ground, resulting in contamination, or cause lateral shifting and wrinkling on downstream processing equipment. Both scenarios will increase the defect rate of the Mylar film in subsequent processing.

[0003] For example, Chinese utility model patent with publication number "CN218621261U" discloses an adjustable feeding device for a ribbon weaving machine. This device includes a base frame, a mounting frame fixedly connected to one side of the top of the base frame, a ribbon weaving machine body fixedly connected to the base frame on one side of the mounting frame, a fixed plate fixedly connected to one side of the ribbon weaving machine body, a sliding plate slidably connected to one side of the fixed plate, a movable rack fixedly connected to one side of the sliding plate, a rotating gear meshing at the bottom of the movable rack, a third motor fixedly connected to one side of the rotating gear, a motor base fixedly connected to the bottom of the third motor and fixedly connected to the base frame, a fixed block fixedly connected to the top of the movable rack, a first motor fixedly connected to the top of the fixed block, a cutting tool fixedly connected to one side of the first motor, and several telescopic rods fixedly connected to the base frame mounted on one side of the motor base. The drawback of this technical solution is that the feeding assembly lacks a closed-loop control structure, making it impossible to adjust the feeding speed based on the real-time raw material usage efficiency of downstream equipment.

[0004] Therefore, this application provides a Mylar film adaptive feeding device that can adaptively adjust the feeding speed and stabilize the belt tension according to the downstream equipment operating conditions and the condition of the material roll. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a Mylar sheet adaptive feeding device, which has the characteristics of adaptively adjusting the feeding speed and stabilizing the tension of the material belt according to the working conditions of downstream equipment and the state of the material roll.

[0006] To achieve the above and other related objectives, this utility model provides the following technical solution: An adaptive feeding device for Mylar flakes includes a rotatable feeding roller that feeds Mylar flakes downstream; A counterweight roller assembly that applies a constant downward pressure to Mylar sheet material belt by its own weight includes a rotating shaft that is parallel to the material roller and rotates about its own axis, and a U-shaped swing arm that has the central axis of the rotating shaft as the axis of rotation and its two free ends connected to the rotating shaft. In addition, an angle sensor is driven to one end of the rotation shaft along its length, and a reducer is driven to one end of the material roller along its length.

[0007] To achieve the above technical solution, the change in tension on the material belt reflects the consumption rate and feeding speed of the material belt. Then, the U-shaped swing arm converts this into a specific rotation angle of the rotating shaft. Finally, the angle sensor accurately converts the mechanical angle change into an electrical signal, which works in conjunction with the reducer to control the rotation speed of the material roller, forming a closed-loop control mechanism for the feeding speed of the material roller.

[0008] Furthermore, it also includes a frame for receiving the material rollers and counterweight rollers; the material rollers and the rotating shaft are arranged transversely across the frame along its length and are rotatably mounted on the frame.

[0009] To achieve the above technical solution, the frame provides a stable installation reference for the material roller and the counterweight roller group, ensuring the relative positional accuracy of the material roller and the counterweight roller group, and avoiding the impact of component misalignment on the material feeding stability.

[0010] Furthermore, the frame includes a guide roller arranged parallel to the material roller to receive the Mylar sheet material strip. The guide roller is positioned at a height higher than the rotation shaft to increase the wrap angle between the U-shaped swing arm and the Mylar sheet material strip.

[0011] To achieve the above technical solution, the wrap angle between the Mylar sheet and the U-shaped swing arm is increased by setting the guide roller. On the one hand, this increases the contact area between the material strip and the U-shaped swing arm, making the downward pressure of the U-shaped swing arm on the material strip more evenly distributed. On the other hand, it enhances the sensitivity of tension detection. The larger wrap angle allows the change in material strip tension to drive the U-shaped swing arm to swing more quickly and obviously, thereby making the signal feedback of the angle sensor more timely.

[0012] Furthermore, the frame also includes a connecting rod extending along its length and a flipping assembly that drives the material roller to rotate axially around the connecting rod. The connecting rod is rotatably mounted on the frame and is connected to the material roller by a pair of support rods.

[0013] The above technical solution achieves the goal of lifting and installing the material roller connected to the support rod onto the frame or removing it from the frame through the synergistic effect between the connecting rod and the support rod. This facilitates the installation of the unloading roller with a full load of material rolls by technicians and improves the safety of the operation.

[0014] Furthermore, the flipping assembly includes a pair of drive cylinders mounted on both sides of the frame. The piston rods of the drive cylinders are hinged to connecting plates via floating joints, and the other end of the connecting plates is sleeved on both ends of the connecting rods along their length.

[0015] To achieve the above technical solution, the design of dual symmetrical cylinders ensures that the connecting rod is subjected to uniform force, making the flipping action smoother and improving the reliability of equipment operation. On the other hand, the cylinder drive automates the flipping operation, eliminating the need for technicians to manually flip and load / unload the rollers, further reducing labor costs and improving production continuity.

[0016] Furthermore, it also includes a PLC control unit connected to the angle sensor and the reducer via electrical signals, used to receive angle change signals from the angle sensor and transmit electrical signals indicating speed changes to the reducer.

[0017] To achieve the above technical solution, the PLC control unit is configured to implement closed-loop control of the feeding speed throughout the entire feeding process, adaptively adjusting the material supply to match the material belt utilization rate of downstream equipment. Simultaneously, the PLC control unit can store multiple sets of control parameters to adapt to different specifications of Mylar sheet material belts, improving the equipment's versatility.

[0018] As described above, the adaptive feeding device for Mylar flakes of this invention has the following beneficial effects: 1. In this application, the change in tension on the conveyor belt reflects the consumption rate and feeding speed of the conveyor belt. Then, the U-shaped swing arm converts it into a specific rotation angle of the rotating shaft. Finally, the angle sensor accurately converts the mechanical angle change into an electrical signal, which works in coordination with the reducer to control the rotation speed of the conveyor roller, forming a closed-loop control mechanism for the feeding speed of the conveyor roller.

[0019] 2. In this application, closed-loop control of the feeding speed is achieved throughout the entire feeding process through the setting of the PLC control unit, adaptively adjusting the material supply to match the material belt utilization rate of downstream equipment. Simultaneously, the PLC control unit can store multiple sets of control parameters to adapt to different specifications of Mylar sheet material belts, improving the equipment's versatility. Attached Figure Description

[0020] Figure 1 The diagram shown is a structural schematic of a Mylar flake adaptive feeding device according to this utility model.

[0021] Figure 2 The diagram shown is a structural schematic from another perspective of a mylar flake adaptive feeding device according to this utility model.

[0022] Among them, 1. Material roller; 2. Counterweight roller group; 21. Rotating shaft; 22. U-shaped swing arm; 3. Angle sensor; 4. Reducer; 5. Frame; 51. Guide roller; 52. Connecting rod; 53. Tilting assembly; 531. Drive cylinder; 532. Piston rod; 533. Connecting plate; 54. Support rod; 541. Opening. Detailed Implementation

[0023] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0024] Please see Figure 1-2 It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0025] Please see Figure 1 and Figure 2 This invention provides an adaptive feeding device for mylar sheets, including a rotatable feeding roller 1 that feeds mylar sheets downstream, a counterweight roller group 2 that applies a constant downward pressure on the mylar sheet strip by its own weight, and a reducer 4 that is connected to one end of the feeding roller 1 along its length. The feeding roller 1 rotates along its own axial direction to continuously feed the mylar sheet strip downstream, and the reducer 4 is used to control the rotational speed of the feeding roller 1, i.e., the feeding speed of the mylar sheets.

[0026] Specifically, the counterweight roller assembly 2 includes a rotating shaft 21 parallel to the material roller 1 and rotating about its own axis, and a U-shaped swing arm 22 with the central axis of the rotating shaft 21 as its rotation axis and its two free ends connected to the rotating shaft 21. The U-shaped swing arm 22 can respond to changes in the material belt tension without additional power, typically due to changes in the material belt utilization rate of downstream equipment or changes in the diameter of the upstream material roller 1. In some other embodiments, a counterweight can be detachably installed at the bottom of the U-shaped swing arm 22. The weight of the counterweight can be adjusted according to the material and thickness of the Mylar sheet to achieve precise control of constant downward pressure.

[0027] An angle sensor 3 is connected to one end of the rotating shaft 21 along its length to monitor the angle change of the rotating shaft 21 in real time. In a specific embodiment, when the U-shaped swing arm 22 is in equilibrium, the angle with the horizontal plane is 45°. If the angle data transmitted by the angle sensor 3 is greater than 45°, it indicates that the tension on the material belt is decreasing, the utilization rate of the material belt by downstream equipment is decreasing, and the rotation speed of the material roller 1 should be reduced. If the angle data transmitted by the angle sensor 3 is less than 45°, it indicates that the tension on the material belt is increasing, the utilization rate of the material belt by downstream equipment is increasing, or the diameter of the material belt is decreasing after use, and the rotation speed of the material roller 1 should be increased.

[0028] In this application, the change in tension on the conveyor belt reflects the consumption rate and feeding speed of the conveyor belt. Then, the U-shaped swing arm 22 converts it into a specific rotation angle of the rotating shaft 21. Finally, the angle sensor 3 accurately converts the mechanical angle change into an electrical signal, which works in coordination with the reducer 4 to control the rotation speed of the roller 1, forming a closed-loop control mechanism for the feeding speed of the roller 1.

[0029] Please continue reading 1 and... Figure 2 It also includes a frame 5 for receiving the material roller 1 and the counterweight roller group 2.

[0030] The frame 5 is made of welded steel plate and has an overall frame structure. The material roller 1 and the rotating shaft 21 are arranged across the length of the frame 5 and are rotatably mounted on the frame 5 through bearings.

[0031] The frame 5 is used to ensure the accuracy of the relative position of the material roller 1 and the counterweight roller group 2, and to avoid the stability of material feeding being affected by component misalignment.

[0032] In one specific embodiment, the frame 5 further includes a guide roller 51 arranged parallel to the material roller 1 to receive the Mylar sheet material strip. The guide roller 51 is made of 45# steel and milled on a lathe. Its roller surface is polished to reduce the friction between it and the material strip. Furthermore, the height of the guide roller 51 is higher than the height of the rotating shaft 21, so that the Mylar sheet material strip forms a larger contact wrap angle with the U-shaped swing arm 22 after passing over the guide roller 51. On the one hand, this increases the contact area between the material strip and the U-shaped swing arm 22, making the downward pressure distribution of the U-shaped swing arm 22 on the material strip more uniform. On the other hand, it enhances the sensitivity of tension detection. The larger wrap angle allows the change in material strip tension to drive the U-shaped swing arm 22 to swing more quickly and obviously, thereby making the signal feedback from the angle sensor 3 more timely.

[0033] Please continue reading. Figure 1 and Figure 2The frame 5 also includes a connecting rod 52 extending along its length and a flipping assembly 53 that drives the material roller 1 to rotate axially around the connecting rod 52. The connecting rod 52 is rotatably mounted on the frame 5 and is connected to the material roller 1 by a pair of support rods 54.

[0034] The connecting rod 52 is located directly below the feed roller 1 and is parallel to it. When it rotates counterclockwise or clockwise around its own axis, it drives the symmetrically arranged support rods 54 to rotate together. This allows the feed roller 1 connected to the support rods 54 to be lifted and installed on or removed from the frame 5, facilitating the installation of the feed roller 1 when it is fully loaded with material and improving operational safety. Preferably, the support plate has an opening 541. When the feed roller 1 needs to be wound, both ends of the feed roller 1 are engaged with the opening 541, and then the connecting rod 52 rotates to flip the feed roller 1. Finally, the feed roller 1 is fed into its corresponding support part on the frame 5.

[0035] In one specific embodiment, the flipping assembly 53 includes a pair of drive cylinders 531 mounted on both sides of the frame 5. The piston rod 532 at its output end is hinged to a connecting plate 533 via a floating joint. The other end of the connecting plate 533 is sleeved on both ends of the connecting rod 52 along its length. This application adopts a double symmetrical cylinder design. On the one hand, this makes the connecting rod 52 subjected to uniform force, resulting in a smoother flipping action and improved equipment reliability. On the other hand, the cylinder drive automates the flipping operation, eliminating the need for manual flipping and loading / unloading of the material rollers 1 by technicians, further reducing labor costs and improving production continuity.

[0036] In addition, it should be noted that this application also includes a PLC control unit connected to the angle sensor 3 and the deceleration electrical signal and the drive cylinder 531. The PLC control unit receives the electrical signal of the angle change of the rotating shaft 21 transmitted by the angle sensor 3 in real time. After analyzing and processing the electrical signal, it transmits the electrical signal of speed adjustment to the reducer 4 to control the output speed of the reducer 4, thereby changing the feeding speed of the material roller 1.

[0037] By configuring the PLC control unit, closed-loop control of the feeding speed is achieved throughout the entire feeding process, adaptively adjusting the tape supply to match the tape utilization rate of downstream equipment. Simultaneously, the PLC control unit can store multiple sets of control parameters to adapt to different specifications of Mylar sheet tape, improving the equipment's versatility.

[0038] The implementation principle of the adaptive feeding device for sheet material in this utility model is as follows: Technicians place both ends of the material roller 1 along its length into the openings 541 on the support rod 54. Then, the PLC control unit sends an electrical signal to the drive cylinder 531, which starts, causing the piston rod 532 to retract and rotate the connecting rod 52. Simultaneously, the material roller 1 rotates with the connecting rod 52 and is mounted onto the frame 5. Next, the technicians pass the Mylar sheet material strip on the material roller 1 around the guide roller 51 and the U-shaped swing arm 22, and then feed it into downstream processing equipment such as laminating or cutting. Subsequently, under its own weight, the U-shaped swing arm 22 applies a constant downward pressure to the Mylar sheet material strip, ensuring that the tension on both ends of the strip remains consistent. Then, when the downstream processing equipment starts, it continuously pulls the Mylar sheet. As the consumption rate of the Mylar sheet by the processing equipment changes... The U-shaped swing arm 22, which is pressed down on the material belt, swings around the rotating shaft 21. Subsequently, the angle sensor 3 monitors the angle change of the rotating shaft 21 in real time. When the swing angle exceeds the preset range, the electrical signal of the angle change is transmitted to the PLC control unit. The PLC control unit analyzes and judges the angle change signal transmitted from the angle sensor 3. When the angle is greater than the preset upper limit, it means that the U-shaped swing arm 22 is falling and the tension of the material belt is too small. The feeding speed needs to be reduced, and a speed reduction signal is sent to the reducer 4. When the angle is less than the preset upper limit, it means that the U-shaped swing arm 22 is rising and the tension on the material belt is too large. The feeding speed needs to be increased, and a speed increase signal is sent to the reducer 4. When the angle returns to the preset range, the PLC control unit sends an electrical signal to the reducer 4 to maintain the speed. When the downstream equipment stops or the material roller 1 needs to be replaced, the PLC sends an electrical signal to the reducer 4 to stop running.

[0039] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A self-adaptive feeding device for Mylar flakes, characterized in that, include: Rotatable feed roller (1) facing downstream to feed Mylar flakes; The counterweight roller group (2) that applies constant downward pressure to the Mylar sheet material belt by its own gravity includes a rotating shaft (21) that is set parallel to the material roller (1) and rotates about its own axis, and a U-shaped swing arm (22) with the central axis of the rotating shaft (21) as the line of the rotating shaft (21) and its two free ends connected to the rotating shaft (21). In addition, an angle sensor (3) is driven to one end of the rotation shaft (21) in the length direction and a reducer (4) is driven to one end of the material roller (1) in the length direction.

2. The adaptive feeding device for Mylar flakes according to claim 1, characterized in that, It also includes a frame (5) for receiving the material roller (1) and the counterweight roller group (2); the material roller (1) and the rotating shaft (21) are arranged across the length of the frame (5) and are rotatably mounted on the frame (5).

3. The adaptive feeding device for Mylar flakes according to claim 2, characterized in that, The frame (5) includes a guide roller (51) arranged parallel to the material roller (1) to receive the Mylar sheet material strip. The height of the guide roller (51) is higher than the height of the rotating shaft (21) to increase the wrap angle between the U-shaped swing arm (22) and the Mylar sheet material strip.

4. The adaptive feeding device for Mylar flakes according to claim 2, characterized in that, The frame (5) also includes a connecting rod (52) extending along its length and a flipping assembly (53) that drives the material roller (1) to rotate axially around the connecting rod (52). The connecting rod (52) is rotatably mounted on the frame (5) and is connected to the material roller (1) by a pair of support rods (54).

5. The adaptive feeding device for Mylar flakes according to claim 4, characterized in that, The flipping assembly (53) includes a pair of drive cylinders (531) mounted on both sides of the frame (5). The piston rod (532) of the drive cylinder (531) is hinged to a connecting plate (533) via a floating joint. The other end of the connecting plate (533) is sleeved on both ends of the connecting rod (52) in the length direction.

6. The Mylar flake adaptive feeding device according to claim 1, characterized in that, It also includes a PLC control unit that is electrically connected to the angle sensor (3) and the reducer (4), for receiving the angle change signal from the angle sensor (3) and transmitting the speed change signal to the reducer (4).

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