Winding tension control device for pressure-sensitive adhesive tape

Abstract

The utility model discloses a pressure-sensitive adhesive tape winding tension control device which sequentially comprises an adhesive tape unfolding assembly, input rollers, a first adjusting roller, a second adjusting roller and an adhesive tape winding roller in the moving direction of an adhesive tape, wherein the input rollers are arranged in pairs up and down and used for clamping the adhesive tape and guiding the adhesive tape in, and the first adjusting roller and the second adjusting roller tension the adhesive tape through height position changes. The adhesive tape unfolding assembly comprises a first motor, an unfolding roller driven by the first motor to rotate and a self-adaptive speed adjusting mechanism which is arranged between an output shaft of the first motor and the unfolding roller and rotates in the adhesive tape unfolding direction relative to the output roller of the first motor under the action of adhesive tape tension. The tension of the adhesive tape is released through self-adaptive expansion of the rotating speed of the adhesive tape in the re-winding process of the large roll of adhesive tape, the tension of the adhesive tape is balanced, and winding or split charging of the adhesive tape is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure-sensitive tape production, in particular to a device for controlling the winding tension of a pressure-sensitive tape. Background Technique

[0002] A pressure-sensitive tape is a special type of tape made by applying a special adhesive (pressure-sensitive adhesive) to a strip-shaped substrate. It consists of a pressure-sensitive adhesive, a substrate, a base adhesive, a back treatment agent, etc. The pressure-sensitive adhesive is the most important component of the pressure-sensitive tape, and its function is to make the tape have pressure-sensitive adhesion characteristics.

[0003] As pointed out in a disclosed environmentally friendly pressure-sensitive tape coater and its process with the patent number ZL2023117876549, the drying component in the machine body dries the pressure-sensitive adhesive on the substrate. After the pressure-sensitive adhesive on the substrate is dried, it will pass through the second guiding roller and finally be wound by the rotating winding roller. During the continuous winding process of the pressure-sensitive adhesive, it has a certain deformation along with the temperature change. The large roll of tape after winding also needs to be divided into small rolls of tape. Before division, the tape needs to be rewound, that is, the large roll of tape is rewound. The large roll of tape is usually unrolled by directly pulling the tape through the rotation of the hub. The large roll of tape requires a large pulling force, which is not conducive to the structural change of the tape. Summary of the Invention

[0004] The purpose of the utility model is to provide a device for controlling the winding tension of a pressure-sensitive tape. The utility model releases the tension of the tape by adapting to the rotation speed of the unrolled tape during the process of rewinding the large roll of tape, balances the tape tension, and facilitates the winding or division of the tape.

[0005] To solve this technical problem, the technical solution of the utility model is: a device for controlling the winding tension of a pressure-sensitive tape, which sequentially includes a tape unrolling component, input rollers arranged in pairs up and down to hold and guide the tape, a first adjusting roller and a second adjusting roller for tensioning the tape by changing the height position, and a tape winding roller along the moving direction of the tape;

[0006] The tape unrolling component includes a first motor, an unrolling roller driven by the first motor to rotate, and an adaptive speed regulating mechanism arranged between the output shaft of the first motor and the unrolling roller, which rotates relative to the output roller of the first motor along the tape unrolling direction under the action of the tape tension.

[0007] For further improvement, the adaptive speed regulation mechanism includes a ball bearing sleeved on the output shaft of the first motor and connecting plates fixed to the output shaft on both sides of the ball bearing along the axial direction of the output shaft. The circumferential edge of the connecting plate facing the unwinding roller is provided with a ratchet structure along the unwinding direction of the tape. Correspondingly, the unwinding roller is provided with at least one set of limiting mechanisms facing and along the ratchet structure of the connecting plate. The limiting mechanism includes a spring piece and a claw with one end fixed to the unwinding roller. The spring piece presses the claw into the ratchet structure. In the present utility model, one side of the claw facing the ratchet structure has a certain degree of surface fit with a single gear. The output roller of the first motor drives the connecting plate to rotate. Through the cooperation between the ratchet structure of the connecting plate and the limiting mechanism in the unwinding rotation direction, when the stress required for unwinding the tape is small, that is, the large roll of tape is wound relatively loosely, the first motor, as the power, drives the rotating roller to unwind the tape through the connecting plate and the limiting mechanism, and can meet the rotation speed of the input roller for guiding the tape. The tape passes through the first adjusting roller and the second adjusting roller whose height positions change to tension the tape and then enters the tape winding roller to be wound again; when the tape is wound tightly, the length of the tape unwound by the first motor driving the unwinding roller cannot meet the rotation speed of the input roller. At this time, the input roller pulls the rotating roller to rotate relative to the connecting plate in the unwinding direction of the tape until the unwinding length can meet the rotation of the input roller, so as to achieve adaptive speed regulation, ensure that the tension of the tape entering the input roller is released, and facilitate rewinding.

[0008] Preferably, three sets of the limiting mechanisms are evenly arranged along the circumference of the connecting plate.

[0009] For further improvement, the spring piece has a structure bent towards the ratchet structure. In the present utility model, the stable action on the claw is maintained through the self-structure of the spring piece.

[0010] For further improvement, one end of the claw is hinged to the side wall of the unwinding roller, and the free end of the claw is kept in a trend of being pressed into the ratchet structure under the drive of the spring piece. In the present utility model, through the cooperation between the claw and the ratchet structure, the adaptive speed regulation rotation of the unwinding roller relative to the output shaft in the unwinding rotation direction is ensured. At the same time, it is also ensured that when the external pulling force is not large, that is, the unwinding speed of the first motor can meet the rotation of the input roller, the output shaft can drive the unwinding roller to rotate synchronously.

[0011] For further improvement, the height of the tape winding roller is between the first adjusting roller and the second adjusting roller.

[0012] For further improvement, the height of the first adjusting roller is higher than that of the tape winding roller, and the height of the second adjusting roller is lower than that of the tape winding roller.

[0013] For further improvement, the first adjusting roller cooperates with the second adjusting roller through a height adjustment structure to tension the tape.

[0014] At least one of the input rollers that pair - set and hold the clamping tape in the up - down position and guide the tape is driven to rotate by a second motor for further improvement.

[0015] By adopting the above - mentioned technical solution, the beneficial effects of the utility model are as follows:

[0016] The utility model discloses a pressure - sensitive tape winding tension control device, which sequentially includes a tape unwinding assembly, input rollers that pair - set and hold the clamping tape in the up - down position and guide the tape, a first adjusting roller and a second adjusting roller that tension the tape by changing the height position, and a tape winding roller along the moving direction of the tape; during the process of unwinding and re - winding, when the large - roll tape to be unwound on the unwinding roller is wound relatively loosely, the pulling force on the tape is small, and the first motor drives the unwinding roller actively to realize the unwinding of the tape. The unwound tape enters the first adjusting roller and the second adjusting roller that tension the tape by changing the height position through the input rollers that pair - set and hold the clamping tape in the up - down position, and finally winds the tape onto the winding roller; when the tape on the unwinding roller is wound tightly or the winding radius is small, the rotation speed of the first motor is difficult to meet the rotation speed of the input rollers. At this time, due to the continuous structure of the tape, the input rollers apply a pulling force to the tape on the unwinding roller, and the unwinding roller is driven to rotate relative to the output shaft of the first motor through the adaptive speed - regulating mechanism to release the tape, realizing the unwinding and re - winding of the tape.

[0017] On the premise of realizing the automatic unwinding of the tape, the utility model can also handle the situation where the tape is wound too tightly or the unwinding rate of the tape cannot meet the winding rate due to the reduction of the unwinding radius, effectively realizing the self - adjustment of the unwinding rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic winding state diagram of a pressure - sensitive tape winding tension control device related to the utility model;

[0019] Figure 2 is a three - dimensional view of a pressure - sensitive tape winding tension control device related to the utility model;

[0020] Figure 3 is a three - dimensional structural schematic diagram of the unwinding assembly in the utility model;

[0021] Figure 4 is a three - dimensional structural schematic diagram (hiding the cover plate) of the unwinding assembly in the utility model.

[0022] In the figure:

[0023] Tape unwinding assembly 1; first click 11; unwinding roller 12; adaptive adjustment mechanism 13; ball bearing 14; connecting plate 15; ratchet structure 151; limiting mechanism 16; elastic piece 161; claw 162; input roller 2; first adjusting roller 3; second adjusting roller 4; winding roller 5; second motor 6 。 Detailed implementation mode

[0024] In order to further explain the technical solution of the present invention, the present invention will be elaborated in detail through specific embodiments below.

[0025] The present invention discloses a pressure-sensitive tape winding tension control device, as Figures 1 to 4 shown, sequentially including a tape unwinding assembly 1, an input roller 2 arranged in pairs up and down to hold the tape and guide the tape, a first adjusting roller 3 and a second adjusting roller 4 for tensioning the tape by changing the height position, and a tape winding roller 5 along the moving direction of the tape; the tape unwinding assembly 1 includes a first motor 11, an unwinding roller 12 driven by the first motor 11, and an adaptive speed regulation mechanism 13 arranged between the output shaft of the first motor 11 and the unwinding roller 12, which rotates relative to the output roller of the first motor 11 along the tape unwinding direction under the action of the tape tension.

[0026] In this embodiment, the adaptive speed regulation mechanism 13 includes a ball bearing 14 sleeved on the output shaft of the first motor 11 and connecting plates 15 fixed to the output shaft on both sides of the ball bearing 14 along the axial direction of the output shaft. A ratchet structure 151 is provided on the circumferential edge of the connecting plate 15 facing the unwinding roller 12 along the tape unwinding direction. Correspondingly, at least one set of limiting mechanisms 16 is provided on the unwinding roller 12 facing and along the ratchet structure 151 of the connecting plate 15. The limiting mechanism 16 includes a leaf spring 161 and a pawl 162 with one end fixed to the unwinding roller 12. The leaf spring 161 presses the pawl 162 into the ratchet structure 151. In this embodiment, one side of the pawl 162 facing the ratchet structure 151 has a certain degree of surface contact with a single gear. The output roller of the first motor 11 drives the connecting plate 15 to rotate. Through the cooperation between the ratchet structure 151 of the connecting plate 15 and the limiting mechanism 16 in the unwinding rotation direction, when the stress required for unwinding the tape is small, that is, the large roll of tape is wound relatively loosely, the first motor 11, as the power, drives the rotating roller to unwind the tape through the connecting plate 15 and the limiting mechanism 16, and the rotation speed can meet the rotation speed of the input roller 2 for guiding the tape. The tape passes through the first adjusting roller 3 and the second adjusting roller 4 that change the height position to tension the tape and then enters the tape winding roller 5 to be wound again. When the tape is wound tightly, the length of the tape unwound by the first motor 11 driving the unwinding roller 12 cannot meet the rotation speed of the input roller 2. At this time, the input roller 2 pulls the rotating roller to rotate relative to the connecting plate 15 in the tape unwinding direction until the unwinding length can meet the rotation of the input roller 2, so as to achieve adaptive speed regulation, ensure that the tension of the tape entering the input roller 2 is released, and facilitate rewinding.

[0027] In this embodiment, three sets of the limiting mechanisms 16 are evenly arranged along the circumference of the connecting plate 15.

[0028] In this embodiment, the leaf spring 161 has a structure bent towards the ratchet structure 151. In this embodiment, the stable action on the pawl 162 is maintained through the self-structure of the leaf spring 161.

[0029] In this embodiment, one end of the pawl 162 is hinged to the side wall of the unwinding roller 12, and the free end of the pawl maintains a tendency to be pressed into the ratchet structure 151 under the drive of the leaf spring 161. In this embodiment, through the cooperation between the pawl 162 and the ratchet structure 151, the adaptive speed regulation rotation of the unwinding roller 12 relative to the output shaft in the unwinding rotation direction is ensured. At the same time, it is also ensured that when the external pulling force is not large, that is, the unwinding speed of the first motor 11 can meet the rotation of the input roller 2, the output shaft can drive the unwinding roller 12 to rotate synchronously.

[0030] In this embodiment, the height of the tape winding roller 5 is between the first adjusting roller 3 and the second adjusting roller 4.

[0031] In this embodiment, the height of the first adjusting roller 3 is higher than that of the tape winding roller 5, and the height of the second adjusting roller 4 is lower than that of the tape winding roller 5.

[0032] In this embodiment, the first adjusting roller 3 cooperates with the second adjusting roller 4 through a height adjusting structure to tension the tape.

[0033] In this embodiment, at least one of the input rollers 2 that are arranged in pairs up and down to clamp the tape and guide the tape is driven to rotate by a second motor 6.

[0034] The specific working process of this embodiment is as follows:

[0035] This embodiment discloses a pressure-sensitive tape winding tension control device, which sequentially includes a tape unwinding assembly 1, input rollers 2 that are arranged in pairs up and down to clamp the tape and guide the tape, a first adjusting roller 3 and a second adjusting roller 4 that tension the tape by changing the height position, and a tape winding roller 5 along the moving direction of the tape; during the process of unwinding and rewinding, when the large roll of tape to be unwound on the unwinding roller 12 is wound relatively loosely, the pulling force on the tape is small, and the first motor 11 drives the unwinding roller 12 actively, thus realizing the unwinding of the tape. The unwound tape enters the first adjusting roller 3 and the second adjusting roller 4 that tension the tape by changing the height position through the input rollers 2 that are arranged in pairs up and down to clamp the tape and guide the tape, and finally winds the tape onto the winding roller 5; when the tape on the unwinding roller 12 is wound tightly or the winding radius is small, the rotation speed of the first motor 11 is difficult to meet the rotation speed of the input roller 2. At this time, due to the continuous structure of the tape, the input roller 2 applies a pulling force to the tape on the unwinding roller 12, and drives the unwinding roller 12 to rotate relative to the output shaft of the first motor 11 through the adaptive speed regulating mechanism 13 to release the tape, realizing the unwinding and rewinding of the tape.

[0036] On the premise of realizing the automatic unwinding of the tape, this embodiment can also realize the situation where the tape is wound too tightly or the unwinding rate of the tape cannot meet the winding rate of the tape due to the reduction of the unwinding radius, effectively realizing the self-adjustment of the unwinding rate.

Claims

1. A pressure-sensitive tape winding tension control device, characterized in that: The device includes a tape unwinding assembly, input rollers arranged in pairs at upper and lower positions for clamping and guiding the tape, a first adjustment roller and a second adjustment roller for tensioning the tape by changing the height position, and a tape winding roller. The tape unwinding assembly includes a first motor, an unwinding roller driven to rotate by the first motor, and an adaptive speed regulating mechanism arranged between the first motor output shaft and the unwinding roller and rotating relative to the first motor output roller along the tape unwinding direction under the action of the tape tension.

2. A pressure-sensitive adhesive tape winding tension control device as claimed in claim 1, characterized in that: The adaptive speed regulation mechanism includes a ball bearing sleeved on the output shaft of the first motor and a connecting plate fixed to the output shaft on both sides of the ball bearing along the axial direction of the output shaft. The connecting plate is provided with a ratchet structure along the unfolding direction of the tape on the circumferential edge facing the unfolding roller. Correspondingly, the unfolding roller is provided with at least one set of limiting mechanisms toward and along the ratchet structure of the connecting plate. The limiting mechanism includes a spring sheet and a claw fixed at one end to the unfolding roller, and the spring sheet presses the claw into the ratchet structure.

3. A pressure-sensitive adhesive tape winding tension control device as claimed in claim 2, characterized in that: Three groups of the limiting mechanisms are evenly arranged along the circumference of the connecting plate.

4. A pressure-sensitive adhesive tape winding tension control device as claimed in claim 2, characterized in that: The spring sheet has a structure bent toward the ratchet structure.

5. A pressure-sensitive adhesive tape winding tension control device as claimed in claim 2, characterized in that: One end of the clamping claw is hinged to the side wall of the unfolding roller, and the free end of the clamping claw maintains a tendency to be pressed into the ratchet structure under the drive of the spring sheet.

6. A pressure-sensitive adhesive tape winding tension control device as claimed in claim 1, characterized in that: The height of the adhesive tape winding roller is between the first adjusting roller and the second adjusting roller.

7. A pressure-sensitive adhesive tape winding tension control device as claimed in claim 6, characterized in that: The height of the first adjustment roller is higher than the tape winding roller, and the height of the second adjustment roller is lower than the tape winding roller.

8. A pressure-sensitive adhesive tape winding tension control device as claimed in claim 4, characterized in that: The first adjusting roller cooperates with the second adjusting roller to tension the adhesive belt through a height adjustment structure.

9. A pressure-sensitive adhesive tape winding tension control device as claimed in claim 1, characterized in that: At least one of the input rollers arranged in pairs at upper and lower positions for clamping the adhesive tape and introducing the adhesive tape is driven to rotate by a second motor.

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