A light-shielding tape flexible edge wrapping device and method

Abstract

The present invention discloses a flexible edge wrapping device and method for a light-shielding tape. The device includes a device platform, on which a guide plate and a plurality of rollers are arranged in sequence along the product feeding direction, and the plurality of rollers have different inclination angles respectively; the guide plate is used for pressing down a suspended part of the light-shielding tape by an angle when a product with a light-shielding tape attached to the front is fed; the plurality of rollers include a plurality of guide rollers and a pair of edge wrapping rollers arranged in sequence along the product feeding direction, the guide rollers are used for guiding the suspended part of the light-shielding tape to be gradually bent downward, and the edge wrapping rollers are used for tightly pressing the light-shielding tape on the side and back of the product; among the plurality of rollers, at least the edge wrapping rollers have an elastic surface. The device of the present invention guides and bends the light-shielding tape through a plurality of rollers with different inclination angles, and ensures the edge wrapping quality by setting at least the edge wrapping rollers to have an elastic surface, thereby improving the production efficiency and yield of the edge wrapping of the light-shielding tape.

Description

Technical Field

[0001] The present invention relates to the technical field of tape edge wrapping, and particularly to a flexible edge wrapping device and method for light-shielding tape. Background Art

[0002] In the current display panel assembly scenario, there is a process of wrapping a black light-shielding tape around the four sides of the display panel product. The functions of this light-shielding tape are, firstly, to prevent light leakage at the edges of the display panel, and secondly, to reinforce the connection between the display panel and the backlight panel, making their combination more firm.

[0003] Currently, for this process, the vast majority of factories rely on manual labor to complete the edge wrapping of this light-shielding tape. The one-time qualification rate of manual operation is 70 - 90%, and the qualification rate is restricted by the proficiency of workers, and the efficiency is relatively low, about 1 piece / minute / person, and it is impossible to form a stable and continuous output. There are also very few display module manufacturers that use equipment for attachment, but there are problems such as high equipment cost and low yield.

[0004] The existing edge wrapping equipment, such as Figure 1 and Figure 2 shown, is provided with paired edge wrapping rollers 11. It mainly relies on the downward pressure of the rollers 11 to bend the light-shielding tape 12, and then feeds the light-shielding tape 12 towards the center of the product 13 through the rollers 11 to complete the edge wrapping process of the light-shielding tape 12. However, once the position of the product 13 is skewed, it will cause poor attachment or directly damage the product 13 during the downward pressure process of the rollers 11. Summary of the Invention

[0005] The purpose of the present invention is to provide a flexible edge wrapping device and method for light-shielding tape, so as to improve the production efficiency and yield of the edge wrapping of the light-shielding tape.

[0006] To achieve the above-mentioned invention purpose, the technical solution adopted by the present invention is as follows:

[0007] In the first aspect, a flexible edge wrapping device for light-shielding tape is provided, including a device platform. On the device platform, a guide plate and a plurality of rollers are arranged in sequence along the product feeding direction. The plurality of rollers respectively have different inclination angles, and the inclination angle refers to the angle between the axial direction of the roller and the plane where the product is located; the guide plate is used for pressing down a part of the suspended light-shielding tape by an angle when the product with the light-shielding tape attached to the front surface is fed; the plurality of rollers include a plurality of guide rollers and a pair of edge wrapping rollers arranged in sequence along the product feeding direction. The guide rollers are used for guiding the suspended part of the light-shielding tape to be gradually bent downward, and the edge wrapping rollers are used for tightly pressing the light-shielding tape on the side and back of the product; among the plurality of rollers, at least the edge wrapping rollers have an elastic surface.

[0008] In the first possible implementation, the multiple guiding rollers include a horizontal roller, multiple upper inclined rollers, a vertical roller, and multiple lower inclined rollers arranged in sequence along the product feeding direction. The edge-wrapping roller is composed of a pair of upper and lower rollers. The gap between the upper roller and the lower roller is slightly smaller than the product thickness. The axes of the multiple rollers are all perpendicular to the product feeding direction. The inclination angle of the horizontal roller is 0, which is used to flatten the part of the light-shielding tape attached to the front of the product. The inclination angle of the upper inclined roller is positive, which is used to bend the suspended part of the light-shielding tape downward to be close to the side of the product. The inclination angle of the vertical roller is 90 degrees, which is used to tightly press and attach the suspended part of the light-shielding tape to the side of the product. The inclination angle of the lower inclined roller is negative, which is used to continue to bend the current suspended part of the light-shielding tape toward the back of the product to be close to the back of the product. The inclination angle of the pair of edge-wrapping rollers is 0, which is used to tightly press the light-shielding tape from both sides of the product, so that the light-shielding tape is attached to the front and back of the product.

[0009] In combination with the first possible implementation, further, the multiple upper inclined rollers include two rollers with inclination angles of 30 degrees and 60 degrees respectively, and the multiple lower inclined rollers include two rollers with inclination angles of -60 degrees and -30 degrees respectively.

[0010] In combination with the first possible implementation, further, the device platform includes a movable platform that can move horizontally and a liftable sliding table arranged on the movable platform. The guiding plate, the horizontal roller, the multiple upper inclined rollers, and the vertical roller are arranged on the liftable sliding table, and the multiple lower inclined rollers and the pair of edge-wrapping rollers are arranged on the movable platform; or, the guiding plate, the horizontal roller, the multiple upper inclined rollers, and the vertical roller are arranged on the movable platform, and the multiple lower inclined rollers and the pair of edge-wrapping rollers are arranged on the liftable sliding table.

[0011] In the second possible implementation manner, the multiple guiding rollers include multiple upper inclined rollers and vertical rollers arranged in sequence along the product feeding direction. The edge wrapping roller is composed of a pair of upper rollers and lower rollers, and the gap between the upper roller and the lower roller is slightly smaller than the product thickness. The inclination angles of the multiple upper inclined rollers are positive, and are used to bend the suspended part of the light-shielding tape downward to be close to the side of the product. The inclination angle of the vertical roller is 90 degrees and is connected to the first cylinder, and can move back and forth perpendicular to the product feeding direction, and is used to tightly press and attach the suspended part of the light-shielding tape to the side of the product. The inclination angle of the edge wrapping roller is 0 and is connected to the second cylinder, and can move back and forth perpendicular to the product feeding direction, and is used to tightly press the light-shielding tape from both sides of the product to make the light-shielding tape attach to the front and back of the product. Among them, the axial directions of the upper inclined rollers and the vertical rollers are both perpendicular to the product feeding direction, the axial direction of the edge wrapping roller is parallel to the product feeding direction, and the length of the edge wrapping roller is equivalent to the length of the product.

[0012] In combination with the second possible implementation manner, further, the multiple upper inclined rollers include two rollers with inclination angles of 30 degrees and 60 degrees respectively.

[0013] In combination with the second possible implementation manner, further, the device platform includes a movable platform that can move horizontally and a liftable sliding table arranged on the movable platform. The guiding plate, the multiple upper inclined rollers and the vertical rollers are arranged on the liftable sliding table, and the edge wrapping roller is arranged on the movable platform.

[0014] In combination with the second possible implementation manner, further, the two edge wrapping rollers are connected with a spring device, and this spring device is used to apply pressure to automatically tighten the two edge wrapping rollers.

[0015] In the second aspect, an application method of the light-shielding tape flexible edge wrapping device is provided. The device is the device as described in the first aspect. The method includes: S1. Provide a product with a light-shielding tape attached, wherein a part of the light-shielding tape is attached to the front of the product, and the other part is suspended outside the edge of the product. S2. Feed the product into the device, and gradually bend the suspended part of the light-shielding tape downward through the guiding plate and multiple guiding rollers of the device, and then tightly press the light-shielding tape on the side and back of the product through the edge wrapping roller of the device.

[0016] Further, the device is specifically the device described in the first possible implementation manner of the first aspect. The step S2 may specifically include: feeding the product into the device, and bending the suspended part of the light-shielding tape downward to be close to the side of the product through the guide plate and multiple upwardly inclined rollers of the device; controlling the product to continue feeding, and tightly pressing and attaching the suspended part of the light-shielding tape to the side of the product through the vertical roller of the device; controlling the product to continue feeding, and bending the suspended part of the light-shielding tape toward the back of the product to be close to the back of the product through the multiple downwardly inclined rollers of the device; controlling the product to continue feeding, and pressing the current suspended part of the light-shielding tape against the back of the product through the edge-wrapping roller of the device, so that the light-shielding tape is tightly attached to the front, side, and back of the product under the action of the edge-wrapping roller.

[0017] Further, the device is specifically the device described in the second possible implementation manner of the first aspect. The step S2 specifically includes: feeding the product into the device, and bending the suspended part of the light-shielding tape downward to be close to the side of the product through the guide plate and multiple upwardly inclined rollers of the device; after feeding the product to a preset distance beyond the vertical roller of the device, controlling the vertical roller to move toward the product to tightly press and attach the suspended part of the light-shielding tape to the side of the product. During this process, control the product to move toward the guide plate first until the light-shielding tape at the starting part of the product is tightly pressed and attached to the side of the product by the vertical roller, then control the product to continue feeding until the product completely passes through the position where the vertical roller is located, and the suspended part of the light-shielding tape is tightly pressed and attached to the side of the product by the vertical roller, and then control the vertical roller to retract; control the product to continue feeding to the position where the edge-wrapping roller is located, and control the edge-wrapping roller to move toward the product to press the current suspended part of the light-shielding tape against the back of the product, so that the light-shielding tape is tightly attached to the front, side, and back of the product under the action of the edge-wrapping roller.

[0018] By adopting the above technical solutions, the present invention has achieved the following technical effects:

[0019] In order to improve the production efficiency and yield of the edge-wrapping of the light-shielding tape, meet the market demand, the present invention has made technical improvements to the bending and edge-wrapping processes of the light-shielding tape, and provides a new flexible edge-wrapping device for the light-shielding tape.

[0020] The device guides the light-shielding tape to be gradually bent and attached to the side and back of the product through multiple rollers with different inclination angles, completes the entire coating work, improves the edge-wrapping quality, and enhances the production efficiency and yield of the edge-wrapping of the light-shielding tape.

[0021] Furthermore, the outer surfaces of all or part of the rollers of the device are provided with materials with high resilience, such as polyurethane glue. The elastic surface of the roller has the following functions: First, the deformation of the elastic surface of the roller can tightly press the light-shielding tape on the product; Second, the elastic deformation generated by the elastic surface of the roller can absorb the impact on the product and protect the product. For example, when the product enters with a slight skew, the elastic surface of the roller can generate deformation to absorb the impact on the product; Third, even if the product entering the device has a slight skew, etc., it can be corrected by the elastic roller during the wrapping process without affecting the edge wrapping quality of the light-shielding tape, and the light-shielding tape can still be well wrapped on the product without being affected, achieving low cost, high efficiency, and at the same time effectively improving the production yield.

[0022] Furthermore, the device can also adjust the positions of the rollers by adjusting its liftable slide and movable slide to adapt to the edge wrapping of products with different sizes and thicknesses, which is convenient and fast to debug and has strong compatibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments and the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0024] Figure 1 is a side view of an existing edge wrapping device;

[0025] Figure 2 is a top view of an existing edge wrapping device;

[0026] Figure 3 is a perspective view of a light-shielding tape flexible edge wrapping device provided in Embodiment 1 of the present invention;

[0027] Figure 4 is a partial enlarged view of the device provided in Embodiment 1 of the present invention;

[0028] Figure 5 is a schematic diagram of the device provided in Embodiment 1 of the present invention for performing edge wrapping operations;

[0029] Figure 6 is a schematic diagram of the light-shielding tape after the action of the vertical roller in Embodiment 1 of the present invention;

[0030] Figure 7 is a perspective view of a light-shielding tape flexible edge wrapping device provided in Embodiment 2 of the present invention;

[0031] Figure 8 is a schematic diagram of the device provided in Embodiment 2 of the present invention for performing edge wrapping operations;

[0032] Figure 9 It is a top view of the device provided in the second embodiment of the present invention for performing hemming operations;

[0033] Figure 10 It is a schematic diagram of the process of the product passing through multiple rollers of the device in the second embodiment of the present invention;

[0034] Figure 11 It is a schematic diagram of the starting part of the product passing over the third roller of the device in the second embodiment of the present invention;

[0035] Figure 12 It is a schematic diagram of the third roller of the device in the second embodiment of the present invention pressing the light-shielding tape tightly against the side of the product;

[0036] Figure 13 It is a schematic diagram of the light-shielding tape after the action of the vertical roller in the second embodiment of the present invention;

[0037] Figure 14 It is a schematic diagram of the light-shielding tape after completing the hemming in the second embodiment of the present invention;

[0038] Figure 15 It is a schematic diagram of the spring device of the device provided in the second embodiment of the present invention;

[0039] Figure 16 It is a schematic flow chart of an application method of a light-shielding tape flexible hemming device provided in an embodiment of the present invention. Detailed implementation manners

[0040] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0041] The terms "first", "second", "third", etc. in the specification, claims and above-mentioned drawings of the present invention are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or devices.

[0042] The following will be described in detail through specific embodiments respectively.

[0043] In view of the production defects of existing equipment, the present invention provides a novel flexible edge wrapping device for light-shielding tape, which is used to wrap the light-shielding tape around the edge of a product. The product can be various display panels, such as different types of liquid crystal display panels like TN (Twisted Nematic), IPS (In-Plane Switching), VA (Vertical Alignment), OLED (Organic Light-Emitting Diode), etc. Of course, it can also be other plate-like products.

[0044] The device includes a device platform, on which a guide plate and a plurality of rollers are arranged in sequence along the product feeding direction, and the plurality of rollers have different inclination angles respectively. The inclination angle refers to the angle between the axial direction (i.e., the central axis direction) of the roller and the plane where the product is located. When the product is placed horizontally, the plane where the product is located is the horizontal plane. When a product with a light-shielding tape attached to its front (upper surface) is fed, the device first presses down the suspended part of the light-shielding tape by an angle through its guide plate, and then guides the suspended part of the light-shielding tape to be gradually bent downward through a plurality of rollers with different inclination angles, and then tightly presses and adheres it to the side and back (lower surface) of the product to complete the entire edge wrapping (or covering) work.

[0045] The plurality of rollers include several guiding rollers for guiding the suspended part of the light-shielding tape to be gradually bent downward, and a pair of edge wrapping rollers (or called pressing rollers) for tightly pressing and adhering the light-shielding tape to the side and back of the product. The several guiding rollers are arranged between the guide plate and the edge wrapping rollers, and the inclination angles of the several guiding rollers are different and gradually change.

[0046] All or part of the plurality of rollers, such as at least the edge wrapping rollers, have an elastic surface. In a specific implementation, the elastic surface of the roller can be achieved by covering the outer surface of the roller with a polyurethane glue with high resilience or other materials with high elastic properties. High resilience materials such as polyurethane glue can also deform under a small external force and automatically return to their original state when the external force is removed. In addition to the guiding function, each roller also utilizes the deformation of the elastic surface of the roller, especially the deformation of the elastic surface of the edge wrapping roller, to tightly press the light-shielding tape on the product, and makes it possible that even if the product has a slight skew when it enters, it can be corrected by the roller with an elastic surface during the product covering process without affecting the edge wrapping quality of the light-shielding tape.

[0047] In this embodiment, multiple rollers with gradually changing inclination angles are used to gradually bend and wrap the suspended part of the light-shielding tape. In specific implementation, the number of multiple rollers, the setting of the inclination angles, the shape of the rollers, etc. can have different implementation manners. Two different embodiments are provided below in this article. However, it should be understood that the following two embodiments are only preferred examples and do not limit the technical solution of the present invention.

[0048]

Embodiment 1

[0049] Please refer to Figures 3 to 6 , the light-shielding tape flexible edge wrapping device of this embodiment includes a device platform 20. On the device platform 20, a guide plate 201 and multiple rollers 30 with different inclination angles are arranged in sequence along the product feeding direction. The multiple rollers include a guide roller and a pair of edge wrapping rollers 307. The guide roller includes a horizontal roller 301, multiple upper inclined rollers, a vertical roller 304, and multiple lower inclined rollers arranged in sequence along the product feeding direction; the edge wrapping rollers 307 are composed of a pair of upper rollers and lower rollers, and are also called pressing rollers.

[0050] Wherein, the gap between the upper roller and the lower roller is slightly smaller than the product thickness. The axes of the multiple rollers 30 are all perpendicular to the product feeding direction. Among the multiple rollers 30, at least the edge wrapping rollers 307 have an elastic surface.

[0051] The inclination angle of the horizontal roller 301 is 0, which is used to press and smooth the part of the light-shielding tape attached to the front surface of the product; the inclination angle of the upper inclined rollers is positive, which is used to bend the suspended part of the light-shielding tape downward to be close to the side surface of the product; the inclination angle of the vertical roller 304 is 90 degrees, which is used to continue to bend the suspended part of the light-shielding tape downward and then tightly press and attach it to the side surface of the product; the inclination angle of the lower inclined rollers is negative, which is used to continue to bend the current suspended part of the light-shielding tape toward the back surface of the product to be close to the back surface of the product; the inclination angle of the pair of pressing rollers 307 is 0, which is used to tightly press the light-shielding tape from both sides of the product, so that the light-shielding tape is attached to the front and back surfaces of the product.

[0052] Further, the multiple upper inclined rollers include two rollers, namely a roller 302 with an inclination angle of 30 degrees and a roller 303 with an inclination angle of 60 degrees. The multiple lower inclined rollers include two rollers, namely a roller 305 with an inclination angle of -60 degrees and a roller 306 with an inclination angle of -30 degrees. At this time, the multiple rollers include a total of 7 groups. The guide rollers of the first 6 groups are all single, and the last group of pressing rollers is composed of two rollers arranged up and down.

[0053] Further, the device platform 20 includes a movable platform 21 that can move horizontally and a liftable slide 22 disposed on the movable platform 21. The guide plate 201, the horizontal roller 301, the plurality of upper inclined rollers 302, 303 and the vertical roller 304 are arranged on the liftable slide 22, and the plurality of lower inclined rollers 305, 306 and the pair of edge pressing rollers 307 are arranged on the movable platform 21; alternatively, the guide plate 201, the horizontal roller 301, the plurality of upper inclined rollers 302, 303 and the vertical roller 304 are arranged on the movable platform 21, and the plurality of lower inclined rollers 305, 306 and the pair of edge pressing rollers 307 are arranged on the liftable slide 22.

[0054] The working process of the device in this embodiment is as follows:

[0055] (1) When the product with the light-shielding tape on the front enters the edge wrapping device, the suspended part of the light-shielding tape will first be pressed downward by an angle by the guide plate in front of the roller. This angle can be, for example, between 5 - 15°. This guide plate does not contact the edge of the product, but only contacts the middle part of the light-shielding tape. This can effectively avoid the poor wrapping caused by the warping of the corners at the starting position of the light-shielding tape, and at the same time, it also avoids the wrinkling of the corners at the starting part of the tape caused by the resistance when the tape directly enters the roller;

[0056] (2) After passing through the guide plate, the light-shielding tape will reach the first roller, that is, the horizontal roller. The axis of the first roller is horizontal, and the inclination angle is 0. Its function is to tightly press the light-shielding tape on the front to achieve reinforcement attachment and smoothing;

[0057] (3) The product continues to advance forward, bringing the light-shielding tape to the second roller. The axis of the second roller forms an angle of +30° with the horizontal line. When the light-shielding tape passes through this roller, it will be restricted by the outer contour of the roller to form a state of being bent downward by 30°; similarly, the product continues to advance forward and contacts the third roller together with the light-shielding tape. The axis of the third roller forms an angle of +60° with the horizontal line. After passing through the third roller, the light-shielding tape will be further bent downward to an angle of about 60°; the second and third rollers are upper inclined rollers;

[0058] (4) Next, the product will bring the light-shielding tape to the fourth roller, that is, the vertical roller (also known as the hemming roller). Here, the axis of the fourth roller is in a vertical state of 90° with the horizontal line. After being guided by the previous rollers, the light-shielding tape has formed an inclined state of being bent along the boundary of the product. At this time, when passing through this roller, the light-shielding tape will be pressed tightly and thus attached to the side of the product. After passing through this roller, the tape presents a bent state similar to the shape of "7", as Figure 6 shown;

[0059] (5) The product continues to move forward and contacts the fifth and sixth rollers. The fifth and sixth rollers are downward-inclined rollers. Among them, the axial direction of the fifth roller forms an angle of -60° with the horizontal line, and the axial direction of the sixth roller forms an angle of -30° with the horizontal line. Similarly, the light-shielding tape of the remaining suspended part that is not attached to the product will gradually approach the back surface of the product after passing through these two guiding rollers;

[0060] (6) Finally, driven by the device platform, it passes through the last set of rollers, that is, the edge-pressing rollers. The edge-pressing rollers are composed of an upper roller and a lower roller. The product passes through the middle of the upper roller and the lower roller. The gap between the upper and lower rollers is slightly smaller than the thickness of the product. For example, the width of the gap is 85%-95% of the product thickness. In this way, when the product passes through, the upper and lower rollers have a slight pressing effect on the light-shielding tape on the product, enabling the light-shielding tape to tightly adhere to the upper and lower surfaces of the product;

[0061] Subsequently, the product is taken away by the manipulator of the next process, and the edge-wrapping process enters the next cycle.

[0062] Optionally, the device in this embodiment can use the three rollers in the second half as the height reference, fix the heights of the last three rollers, and install the first four rollers on a liftable sliding table, which is convenient for adjusting the heights of the first four rollers to be compatible with products of different thicknesses; the alternative solution can also be that the heights of the first four rollers are fixed as the reference, and the last three rollers are installed on the liftable sliding table, which is a structure with adjustable height. All the rollers and the liftable sliding table are installed on a horizontally movable platform, and different-sized products can be compatible by adjusting the screw.

[0063] The key points of the technical solution in this embodiment include: 1. Using multiple rollers with different inclination angles to guide and bend the light-shielding tape. The number of rollers can be 7 groups, or 5 groups, 9 groups, etc.; 2. The guide plate presses down the light-shielding tape before the rollers to form a bending angle; 3. For products with different sizes and thicknesses, the positions of the rollers can be adjusted up, down, front, and back through the device platform to adapt to the product, reflecting the characteristics of convenient debugging and strong compatibility.

[0064]

Embodiment Two

[0065] Please refer to Figures 7 to 15 , the light-shielding tape flexible edge-wrapping device in this embodiment includes a device platform 40. On the device platform 40, a guide plate 401 and multiple rollers 50 with different inclination angles are arranged in sequence along the product feeding direction. The multiple rollers 50 include guiding rollers and a pair of edge-wrapping rollers 504. The guiding rollers include multiple upward-inclined rollers and a vertical roller 503 arranged in sequence along the product feeding direction. The edge-wrapping rollers 504 are composed of a pair of upper rollers and lower rollers.

[0066] Among them, the gap between the upper roller and the lower roller is slightly smaller than the thickness of the product. The axes of the upper inclined roller and the vertical roller 503 are both perpendicular to the product feeding direction, the axis of the edge wrapping roller 504 is parallel to the product feeding direction, and the length of the edge wrapping roller 504 is comparable to the length of the product. Among the multiple rollers 50, at least the edge wrapping roller has an elastic surface.

[0067] The inclination angles of the multiple upper inclined rollers are positive, and are used to bend the suspended part of the light-shielding tape downward to be close to the side of the product; the inclination angle of the vertical roller 503 is 90 degrees, and it is connected to the first cylinder and can move back and forth perpendicular to the product feeding direction, and is used to continue to bend the suspended part of the light-shielding tape downward and then tightly press and attach it to the side of the product; the inclination angle of the edge wrapping roller 504 is 0, and it is connected to the second cylinder and can move back and forth perpendicular to the product feeding direction, and is used to tightly press the light-shielding tape from both sides of the product to make the light-shielding tape adhere to the front and back of the product.

[0068] Further, the multiple upper inclined rollers include two rollers, namely a roller 501 with an inclination angle of 30 degrees and a roller 502 with an inclination angle of 60 degrees.

[0069] Further, the device platform 40 includes a movable platform 41 that can move horizontally and a liftable slide 42 arranged on the movable platform 41; the guide plate 501, the multiple upper inclined rollers 501, 502 and the vertical roller 503 are arranged on the liftable slide 42, and the edge wrapping roller is arranged on the movable platform 41.

[0070] Further, two edge wrapping rollers 504 are connected with a spring device 505, and the spring device 505 is used to apply pressure to automatically tighten the two edge wrapping rollers 504.

[0071] The working process of the device in this embodiment is as follows:

[0072] (1) When a product with the light-shielding tape attached to its front enters the device, the suspended part of the light-shielding tape will first be pressed downward by an angle by the guide plate in front of the roller. This angle can be, for example, between 5 - 15°. The guide plate does not contact the edge of the product and only contacts the middle part of the light-shielding tape. This can effectively avoid poor wrapping caused by the corners of the starting position of the light-shielding tape warping, and at the same time avoid wrinkles at the corner position of the starting part of the tape caused by resistance when the tape directly enters the roller.

[0073] (2) After passing through the guide plate, the light-shielding tape reaches the first roller. The axis of the first roller forms an angle of +30° with the horizontal line. When the light-shielding tape passes through this roller, it will be restricted by the outer contour of the roller and form a state of being bent downward by 30°. Similarly, as the product continues to move forward, it comes into contact with the second roller together with the light-shielding tape. The axis of the second roller forms an angle of +60° with the horizontal line. After passing through the second roller, the light-shielding tape will be further bent downward to approximately 60°, as shown in Figure 10 ; The first and second rollers are upward-inclined rollers;

[0074] (3) Next, the product will run with the light-shielding tape until it stops after moving a certain distance beyond the third roller. The third roller is a vertical roller, also known as a hemming roller, which is installed on the first cylinder. After the product stops, the first cylinder drives the roller to move towards the product direction, attaching the inclined light-shielding tape to the side of the product, as shown in Figure 12 ; At this time, the product will be driven by the device platform to move towards the guide plate side first until the third roller presses and attaches the light-shielding tape at the starting part of the product to the side of the product. Then the product moves towards the hemming roller side until it completely passes through the vertical roller; At this time, the cylinder driving the third roller retracts, completing the process of attaching the light-shielding tape to the side of the product;

[0075] (4) Next, the product will move to the hemming position. At this time, the tape presents a bent state similar to the shape of "7", as shown in Figure 13 ; The two hemming rollers on both sides will move towards the product direction respectively under the drive of the second cylinder. After completing the hemming action, the second cylinder retracts, driving the hemming rollers to withdraw from the movement range of the product, completing the entire hemming work of the light-shielding tape. At this time, the tape is completely attached to the front, side, and back of the product, as shown in Figure 14 ;

[0076] Subsequently, the product is taken away by the manipulator of the next process, and the hemming process enters the next cycle.

[0077] Optionally, spring devices are provided on both the upper and lower sides of the hemming rollers, as shown in Figure 15 . During the hemming process of the product, they automatically open and close. When opening, they can provide a stable and continuous pressure on the upper and lower surfaces of the product, ensuring that the light-shielding tape can be tightly attached to the product smoothly.

[0078] Optionally, the three rollers and the guide plate are all installed on a liftable sliding table, which is convenient for adjusting the height of the three rollers to accommodate products of different thicknesses; All the rollers and the liftable sliding table are installed on a horizontally movable platform. By adjusting the screw, products of different sizes can be accommodated.

[0079] The key points of the technical solution of this embodiment include: 1. Using multiple rollers with different inclination angles to guide and bend the light-shielding tape; 2. The guide plate presses down on the light-shielding tape before the rollers to form a bending angle; 3. For products with different sizes and thicknesses, the position of the rollers can be adjusted up, down, front, and back through the device platform to adapt to the product, reflecting the characteristics of convenient debugging and strong compatibility; 4. The vertical roller on the side (the third roller) adopts an attachment method that moves from the middle of the light-shielding tape to both ends of the tape in sequence; 5. The edge-wrapping roller uses a rubber-coated mechanism that automatically applies pressure on both the upper and lower sides with a spring structure.

[0080] Above, the light-shielding tape flexible edge-wrapping device provided by the present invention is described through two embodiments. Next, corresponding methods are also provided.

[0081] Please refer to Figure 16 , an embodiment of the present invention provides an application method of a light-shielding tape flexible edge-wrapping device, where the device is the device described above, and the method includes the following steps:

[0082] S1. Provide a product with a light-shielding tape attached, where a part of the light-shielding tape is attached to the front of the product, and the other part is suspended outside the edge of the product;

[0083] S2. Feed the product into the device, and gradually bend the suspended part of the light-shielding tape downward through the guide plate and multiple guide rollers of the device, and then press the light-shielding tape tightly against the side and back of the product through the edge-wrapping roller of the device.

[0084] In one implementation manner, the device is specifically the device described in Embodiment 1 above, and the step S2 may specifically include:

[0085] Feed the product into the device, and bend the suspended part of the light-shielding tape downward to be close to the side of the product through the guide plate and multiple upward-inclined rollers of the device;

[0086] Control the product to continue feeding, and tightly press and attach the suspended part of the light-shielding tape to the side of the product through the vertical roller of the device;

[0087] Control the product to continue feeding, and bend the suspended part of the light-shielding tape toward the back of the product to be close to the back of the product through the multiple downward-inclined rollers of the device;

[0088] Control the product to continue feeding, and press the current suspended part of the light-shielding tape tightly against the back of the product through a pair of edge-wrapping rollers of the device, so that the light-shielding tape tightly adheres to the front, side, and back of the product under the action of the edge-wrapping rollers.

[0089] In one implementation manner, the device is specifically the device described in Embodiment 2 above, and the step S2 may specifically include:

[0090] Feed the product into the device, and bend the suspended part of the light-shielding tape downward to be close to the side of the product through the guide plate and multiple upward-inclined rollers of the device.

[0091] After feeding the product to a preset distance beyond the vertical roller of the device, control the vertical roller to move towards the product, and tightly press and attach the suspended part of the light-shielding tape to the side of the product. During this process, control the product to move towards the guide plate first (i.e., move in the direction opposite to the product feeding direction) until the light-shielding tape at the starting part of the product is tightly pressed and attached to the side of the product by the vertical roller, and then control the product to continue feeding until the product completely passes through the position where the vertical roller is located. The suspended part of the light-shielding tape is tightly pressed and attached to the side of the product by the vertical roller, and then control the vertical roller to retreat.

[0092] Control the product to continue feeding to the position where the edge-wrapping roller is located, control the edge-wrapping roller to move towards the product, and press the current suspended part of the light-shielding tape against the back of the product, so that the light-shielding tape is tightly attached to the front, side and back of the product under the action of the edge-wrapping roller.

[0093] In summary, the embodiment of the present invention discloses a flexible edge-wrapping device and method for a light-shielding tape. It can be seen from the above technical solutions that the embodiment of the present invention has achieved the following technical effects:

[0094] In order to improve the production efficiency and yield of the edge-wrapping of the light-shielding tape and meet the market demand, the present invention has made technical improvements to the bending and edge-wrapping processes of the light-shielding tape, and provides a new flexible edge-wrapping device for the light-shielding tape. The device guides the light-shielding tape to be gradually bent and attached to the side and back of the product through multiple rollers with different inclination angles, completes the entire covering work, improves the edge-wrapping quality, and improves the production efficiency and yield of the edge-wrapping of the light-shielding tape.

[0095] Furthermore, the outer surfaces of all or part of the rollers of the device are provided with materials with high resilience, such as polyurethane glue. The elastic surface of the roller has the following functions: First, the deformation of the elastic surface of the roller can tightly press the light-shielding tape on the product; Second, the elastic deformation generated by the elastic surface of the roller can absorb the impact on the product and protect the product. For example, when the product enters with a slight skew, the elastic surface of the roller can generate deformation to absorb the impact on the product; Third, even if the product entering the device has a slight skew, etc., it can be corrected by the elastic roller during the covering process without affecting the edge-wrapping quality of the light-shielding tape, and still can well cover the light-shielding tape on the product without being affected, achieving low cost and high efficiency while effectively improving the production yield.

[0096] Furthermore, the device can also adjust the positions of the rollers by adjusting its liftable slide table and movable platform, so as to adapt to the edge wrapping of products with different sizes and thicknesses, which is convenient and fast for debugging and has strong compatibility.

[0097] In the above embodiments, the descriptions of the respective embodiments have their own emphases. For parts not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0098] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the above embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A flexible edge wrapping device for a light-shielding tape, comprising a device platform, characterized in that, The device platform is provided with a guide plate and a plurality of rollers arranged in sequence along the product feeding direction. The plurality of rollers have different inclination angles respectively, and the inclination angle refers to the angle between the axial direction of the roller and the plane where the product is located; The guide plate is used to press down a suspended part of the light-shielding tape by an angle when the product with the light-shielding tape attached to the front is fed; The plurality of rollers include a plurality of guide rollers and a pair of edge-sealing rollers arranged in sequence along the product feeding direction. The guide rollers are used to guide the suspended part of the light-shielding tape to be gradually bent downward, and the edge-sealing rollers are used to tightly press the light-shielding tape on the side and back of the product; Among the plurality of rollers, at least the edge-sealing rollers have an elastic surface; The plurality of guide rollers include a horizontal roller, a plurality of upward-inclined rollers, a vertical roller, and a plurality of downward-inclined rollers arranged in sequence along the product feeding direction. The edge-sealing rollers are composed of a pair of upper rollers and lower rollers. The gap between the upper roller and the lower roller is slightly smaller than the thickness of the product. The axial directions of the plurality of rollers are all perpendicular to the product feeding direction; The inclination angle of the horizontal roller is 0, and it is used to flatten the part of the light-shielding tape attached to the front of the product; The inclination angle of the upward-inclined rollers is positive, and it is used to bend the suspended part of the light-shielding tape downward to be close to the side of the product; The inclination angle of the vertical roller is 90 degrees, and it is used to tightly press and attach the suspended part of the light-shielding tape to the side of the product; The inclination angle of the downward-inclined rollers is negative, and it is used to continue to bend the current suspended part of the light-shielding tape toward the back of the product to be close to the back of the product; The inclination angle of the pair of edge-sealing rollers is 0, and it is used to tightly press the light-shielding tape from both sides of the product, so that the light-shielding tape is attached to the front and back of the product; The device platform includes a movable platform that can move horizontally and a liftable sliding table arranged on the movable platform; the guide plate, the horizontal roller, the plurality of upward-inclined rollers, and the vertical roller are arranged on the liftable sliding table, and the plurality of downward-inclined rollers and the pair of edge-sealing rollers are arranged on the movable platform; or, the guide plate, the horizontal roller, the plurality of upward-inclined rollers, and the vertical roller are arranged on the movable platform, and the plurality of downward-inclined rollers and the pair of edge-sealing rollers are arranged on the liftable sliding table; by adjusting the liftable sliding table and the movable platform, the positions of the rollers are adjusted to adapt to the edge-sealing of products with different sizes and thicknesses.

2. The device according to claim 1, characterized in that, The plurality of upward-inclined rollers include two rollers with inclination angles of 30 degrees and 60 degrees respectively, and the plurality of downward-inclined rollers include two rollers with inclination angles of -60 degrees and -30 degrees respectively.

3. The device according to claim 1, characterized in that The plurality of guide rollers include a plurality of upward-inclined rollers and a vertical roller arranged in sequence along the product feeding direction. The edge-sealing rollers are composed of a pair of upper rollers and lower rollers. The gap between the upper roller and the lower roller is slightly smaller than the thickness of the product; The inclination angle of the plurality of upward-inclined rollers is positive, and it is used to bend the suspended part of the light-shielding tape downward to be close to the side of the product; The inclination angle of the vertical roller is 90 degrees and it is connected to the first cylinder. It can move back and forth perpendicular to the product feeding direction and is used to tightly press and attach the suspended part of the light-shielding tape to the side of the product. The inclination angle of the edge-wrapping roller is 0 and it is connected to the second cylinder. It can move back and forth perpendicular to the product feeding direction and is used to tightly press the light-shielding tape from both sides of the product so that the light-shielding tape is attached to the front and back of the product. Among them, the axial directions of the upper inclined roller and the vertical roller are both perpendicular to the product feeding direction, the axial direction of the edge-wrapping roller is parallel to the product feeding direction, and the length of the edge-wrapping roller is comparable to the length of the product.

4. The device according to claim 3, characterized in that, The multiple upper inclined rollers include two rollers with inclination angles of 30 degrees and 60 degrees respectively.

5. The device according to claim 3, characterized in that, The device platform includes a movable platform that can move horizontally and a liftable slide table arranged on the movable platform; the guide plate, the multiple upper inclined rollers and the vertical roller are arranged on the liftable slide table, and the edge-wrapping roller is arranged on the movable platform.

6. The device according to claim 3, wherein, The two edge-wrapping rollers are connected with a spring device, and this spring device is used to apply pressure to automatically tighten the two edge-wrapping rollers.

7. A method for applying a light-shielding tape flexible edge wrapping device, characterized in that, The device is the device as described in claim 1, and the method includes: S1. Provide a product with a light-shielding tape attached, wherein a part of the light-shielding tape is attached to the front of the product and the other part is suspended outside the product edge. S2. Feed the product into the device, gradually bend the suspended part of the light-shielding tape downward through the guide plate and multiple guide rollers of the device, and then tightly press the light-shielding tape on the side and back of the product through the edge-wrapping roller of the device.

8. The method according to claim 7, wherein The device is specifically the device as described in claim 3, and step S2 specifically includes: Feed the product into the device, and bend the suspended part of the light-shielding tape downward to be close to the side of the product through the guide plate and multiple upper inclined rollers of the device. After feeding the product to a preset distance beyond the vertical roller of the device, control the vertical roller to move towards the product to tightly press and attach the suspended part of the light-shielding tape to the side of the product. During this process, control the product to move towards the guide plate first until the light-shielding tape at the starting part of the product is tightly pressed and attached to the side of the product by the vertical roller, then control the product to continue feeding until the product completely passes through the position where the vertical roller is located, and the suspended part of the light-shielding tape is tightly pressed and attached to the side of the product by the vertical roller, and then control the vertical roller to retreat. Control the product to continue feeding to the position where the edge-wrapping roller is located, control the edge-wrapping roller to move towards the product, and tightly press the current suspended part of the light-shielding tape on the back of the product, so that the light-shielding tape is tightly attached to the front, side and back of the product under the action of the edge-wrapping roller.

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