A high-precision winding process for a double-adhesive-layer electronic protective film

Abstract

The present invention provides a high-precision winding process for a double-adhesive-layer electronic protection film, belonging to the technical field of electronic protection film production. The process includes the following steps: A. The core layer is located between the inner adhesive layer and the outer adhesive layer. When the core layer, the outer adhesive layer, and the inner adhesive layer are compounded, they are staggered in a stepped manner, and the staggering width between adjacent layers is controlled between 2 mm and 10 mm; B. During winding, vacuum pumping is performed between the inner side surface of the electronic protection film and the peripheral surface of the coil; C. Before finished product packaging, the corner materials on both sides of the coil are cut, and the cutting width is greater than the staggering width between adjacent layers. The present invention has the advantages of high winding precision and good product quality.

Description

Technical Field

[0001] The present invention belongs to the technical field of electronic protective film production, and relates to a high-precision winding process for a double-adhesive-layer electronic protective film. Background Art

[0002] The electronic protective film has a multi-layer structure. If the functional layer and the base layer are regarded as the core layer, in some finished or semi-finished products of electronic protective films, both outer layers are self-adhesive layers (or there is glue coating to paste the core layer). In this case, it is very difficult to control the precision during winding. The main reasons are as follows: due to the extrusion of the protective film on the side, the glue is easy to overflow or the glue residues are extruded. The asymmetry of the overflowed glue or the randomness of the glue residues cause changes in the traction speeds on both sides of the protective film, thus causing deviation; furthermore, due to the adhesive property caused by the side overflow of the glue, during the winding process, the two sides of the protective film will adhere to the inner protective film before the middle part, which will cause the accumulation of air in the middle part. Then, when winding, the air will be wrapped between the layers of the protective film. As is well known, when there is air hidden between the layers, it will cause a serious decline in the winding quality, and of course, it also includes the influence on the winding precision (such as deviation, wrinkles, bulging of the protective film, etc.); thirdly, when winding a wide-width electronic film, if the winding speed is too fast, even if the two sides are not affected by the overflow of the glue, there is still a situation where some air is difficult to be discharged in time, thus affecting the winding quality and precision. Summary of the Invention

[0003] The purpose of the present invention is to provide a high-precision winding process for a double-adhesive-layer electronic protective film in view of the above problems existing in the prior art. The technical problem to be solved by the present invention is how to improve the winding precision and product quality of the electronic protective film.

[0004] The purpose of the present invention can be achieved by the following technical solutions: a high-precision winding process for a double-adhesive-layer electronic protective film, which is characterized by including the following steps; A. The core layer is located between the inner mucous layer and the outer mucous layer. When the core layer, the outer mucous layer, and the inner mucous layer are compounded, the three are in a stepped dislocation state, and the dislocation width between adjacent layers is controlled between 2 mm and 10 mm; B. During winding, a vacuum pumping treatment is carried out between the inner side of the electronic protective film and the peripheral surface of the coil; C. Before the finished product is packaged, the corner materials on both sides of the coil are cut, and the cutting width is greater than the dislocation width between adjacent layers.

[0005] Further, the winding device adopted in step B includes a mounting frame, a winding roller rotatably connected to the mounting frame, a pressing cylinder arranged on the mounting frame, and a vacuum pumping mechanism. The cylinder body of the pressing cylinder is arranged on the mounting frame, and a pressing roller is rotatably connected to the push rod of the pressing cylinder. The electronic protective film is wound on the winding roller after being pressed by the pressing roller and the winding roller; the width of the air inlet of the vacuum pumping mechanism is smaller than the width of the electronic protective film, and the air inlet of the vacuum pumping mechanism is centrally distributed on the inner side of the electronic protective film.

[0006] Further, the vacuum pumping mechanism includes a mounting arm fixed on the push rod of the pressing cylinder. A film guiding roller, an intermediate shaft and a driving shaft are rotatably connected to the mounting arm. The film guiding roller and the intermediate shaft are connected by a belt. Two spiral guide plates are fixedly arranged on the driving shaft. An air duct sleeving the driving shaft is fixedly arranged on the mounting arm. A notch is formed in the middle of the air duct. An air inlet nozzle is fixedly arranged on the air duct. The air inlet nozzle has a throat near one end of the air duct. The two spiral guide plates are respectively located on both sides of the throat. Transmission gears that mesh with each other are respectively arranged on the driving shaft and the intermediate shaft.

[0007] Further, the air inlet nozzle is flat. From the throat to the inlet, the width of the air inlet nozzle gradually increases, and the height of the air inlet nozzle gradually decreases.

[0008] Before being wound up, the electronic protective film passes through the film guiding roller, so that the winding of the electronic protective film can drive the film guiding roller to rotate. The purpose of arranging the belt, the intermediate shaft and the transmission gears is to make the driving shaft rotate faster, and at the same time ensure that the rotation of the driving shaft can generate negative pressure in the air inlet nozzle.

[0009] The generation of negative pressure can not only timely discharge the air before the electronic protective film is wound and adhered, so that the interlayer gap is smaller after winding and the adhesion degree is better. From the perspective of the coil, the whole diameter of the coil can be reduced, the transportation cost is reduced, and the product quality is improved.

[0010] Since the three-layer film structure is compounded in a stepped and staggered manner, on the one hand, it can improve that the electronic protective film is not easy to generate relative sliding with other rollers when passing through other rollers, and reduce the probability of dislocation and deviation. On the other hand, when being wound into a roll, adjacent layers can be adhered to each other, and combined with the vacuum pumping method, the interlayer gap can be reduced. In addition, in the traditional overlapping compounding method, it is impossible to completely overlap, and there is a situation where the edges of the product are not completely aligned, resulting in a decline in product quality. However, in this solution, there is dislocation during compounding, and then the cut-off waste materials are processed before packaging, improving the product quality.

[0011] The vacuum pumping device can also be an externally driven structure. For example, a vacuum pumping device is directly used, and the air inlet channel is aligned with the area corresponding to the lower side of the electronic protective film. However, this can not only not control the vacuum pumping intensity according to the winding speed, but also it is difficult to properly cooperate with the traction of the electronic protective film in terms of starting and stopping. Description of the Drawings

[0012] Figure 1 is a schematic structural diagram of the winding device.

[0013] Figure 2 is a schematic structural diagram of the vacuum pumping device.

[0014] Figure 3 It is a cross-sectional view of a vacuum pumping device.

[0015] Figure 4 It is a schematic diagram of the three-layer composite state of an electronic protective film.

[0016] Figure 5 It is a schematic diagram showing that the electronic protective film is misaligned and compounded to form two pasting parts.

[0017] Figure 6 It is a schematic diagram of the principle that the electronic protective film is misaligned and compounded to form two pasting parts.

[0018] In the figure, 11 is the core layer; 12 is the inner mucous membrane layer; 13 is the outer mucous membrane layer; 21 is the mounting frame; 22 is the winding roller; 23 is the pressing roller; 24 is the mounting arm; 25 is the film guiding roller; 26 is the pressing cylinder; 3 is the vacuum pumping mechanism; 31 is the intermediate shaft; 32 is the driving shaft; 33 is the spiral guide plate; 34 is the throat; 35 is the transmission gear; 36 is the air inlet nozzle; 37 is the air duct. Specific implementation mode

[0019] The following are specific embodiments of the present invention and in combination with the attached drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0020] The high-precision winding process of the double-adhesive layer electronic protective film includes the following steps; A. The core layer 11 is located between the inner mucous membrane layer 12 and the outer mucous membrane layer 13. When the core layer 11, the outer mucous membrane and the inner mucous membrane are compounded, the three are misaligned in a stepped manner, and the misalignment width between adjacent layers is controlled between 2 mm and 10 mm, as Figure 5 and Figure 6 shown; B. During winding, vacuum pumping treatment is carried out between the inner side surface of the electronic protective film and the peripheral surface of the coil; C. Before finished product packaging, the corner materials on both sides of the coil are cut, and the cutting width is greater than the misalignment width between adjacent layers.

[0021] As Figure 1 , Figure 2 and Figure 3 shown, the winding device adopted in step B includes a mounting frame 21, a winding roller 22 rotatably connected to the mounting frame 21, a pressing cylinder 26 arranged on the mounting frame 21 and a vacuum pumping mechanism 3. The cylinder body of the pressing cylinder 26 is arranged on the mounting frame 21, and a pressing roller 23 is rotatably connected to the push rod of the pressing cylinder 26. The electronic protective film is wound on the winding roller 22 after being pressed by the pressing roller 23 and the winding roller 22; the air inlet width of the vacuum pumping mechanism 3 is smaller than the width of the electronic protective film, and the air inlet of the vacuum pumping mechanism 3 is centrally distributed on the inner side of the electronic protective film.

[0022] The vacuum pumping mechanism 3 includes a mounting arm 24 fixed to the push rod of the pressing cylinder 26. A film guiding roller 25, an intermediate shaft 31, and a driving shaft 32 are rotatably connected to the mounting arm 24. A belt is connected between the film guiding roller 25 and the intermediate shaft 31. Two spiral guide plates 33 are fixedly arranged on the driving shaft 32. An air duct 37 sleeving the driving shaft 32 is fixedly arranged on the mounting arm 24. A notch is provided in the middle of the air duct 37. An air inlet guiding nozzle 36 is fixedly arranged on the air duct 37. The air inlet guiding nozzle 36 has a throat 34 near one end of the air duct 37. The two spiral guide plates 33 are respectively located on both sides of the throat 34. Transmission gears 35 that mesh with each other are respectively arranged on the driving shaft 32 and the intermediate shaft 31.

[0023] The air inlet guiding nozzle 36 is flat. From the throat 34 to the inlet, the width of the air inlet guiding nozzle 36 gradually increases, and the height of the air inlet guiding nozzle 36 gradually decreases.

[0024] Before being wound up, the electronic protective film passes through the film guiding roller 25, so that the winding of the electronic protective film can drive the film guiding roller 25 to rotate. The purpose of arranging the belt, the intermediate shaft 31, and the transmission gears 35 is to make the driving shaft 32 rotate faster, and at the same time ensure that the rotation of the driving shaft 32 can generate negative pressure in the air inlet guiding nozzle 36.

[0025] The generation of negative pressure can not only timely discharge the air before the electronic protective film is wound and attached, making the interlayer gap smaller after winding and the adhesion degree better. From the perspective of the coil, it can make the entire diameter of the coil smaller, reduce the transportation cost, and improve the product quality.

[0026] Since the three-layer film structure is compounded in a stepped dislocation manner, on the one hand, it can improve that the electronic protective film is not easy to generate relative sliding with the roller when passing through other rollers, reducing the probability of dislocation and deviation. On the other hand, when in a roll, adjacent layers can be adhered to each other, and in cooperation with the vacuum pumping method, the interlayer gap can be reduced. In addition, in the traditional overlapping compounding method, it is impossible to completely overlap, and there is an incomplete alignment at the edges of the product, resulting in a decline in product quality. However, in this solution, it is misaligned during compounding, and then the corner materials are cut before packaging, improving the product quality.

[0027] The vacuum pumping device can also be an externally driven structure, such as directly using a vacuum pumping device and aligning the air inlet channel with the corresponding area on the lower side of the electronic protective film. However, this not only cannot control the vacuum pumping intensity according to the winding speed, but also it is difficult to properly cooperate with the traction of the electronic protective film in terms of starting and stopping.

[0028] Figure 4As shown, if vacuum pumping is not performed on the area of the electronic protective film that is about to be wound up, since both sides of the electronic protective film will be adhered to the winding roller 22, when the winding speed is relatively fast or the tension is not large enough, the air in the middle of the electronic protective film cannot be discharged in time, causing the two side edges to move inward under the action of air pressure, resulting in winding misalignment, wrinkles and bulges of the film.

[0029] As Figure 6 shown, for the three-layer stepped misaligned composite electronic protective film, when being wound up, a pasting part is formed on each side respectively, and the part that is about to be wound up can be pasted with the already wound electronic protective film. With the cooperation of vacuum pumping treatment, the winding fitting degree and the edge neatness of the film are greatly improved.

[0030] It should be noted that: the air inlet nozzle 36 does not contact the inner side surface of the electronic protective film, there is a certain negative pressure in the pressing cylinder to ensure that the pressing roller presses the winding roller, and the electronic protective film is tangent to both the pressing roller and the tightening roller at the same time. The cylinder body of the pressing cylinder can be fixed on the mounting frame 21 or hinged at the axis of the winding roller. By adjusting the angle of the pressing cylinder to adapt to the traction path of the electronic protective film, during the process of the increase of the diameter of the winding roller, the vacuum pumping device moves synchronously with it, and basically maintains a relatively constant vacuum pumping position.

[0031] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A high-precision winding process for a double-adhesive-layer electronic protection film, characterized in that, It includes the following steps: A. The core layer (11) is located between the inner mucosal layer (12) and the outer mucosal layer (13). When the core layer (11), the outer mucosal layer (13) and the inner mucosal layer (12) are compounded, they are staggered in a stepped manner, and the staggering width between adjacent layers is controlled between 2 mm and 10 mm; B. During winding, vacuum pumping is performed between the inner side of the electronic protective film and the circumferential surface of the coil; C. Before finished product packaging, the waste materials at both sides of the coil are cut, and the cutting width is greater than the staggering width between adjacent layers. The winding device used in step B includes a mounting frame (21), a winding roller (22) rotatably connected to the mounting frame (21), a pressing cylinder (26) provided on the mounting frame (21), and a vacuum pumping mechanism (3). The cylinder body of the pressing cylinder (26) is provided on the mounting frame (21), and a pressing roller (23) is rotatably connected to the push rod of the pressing cylinder (26). The electronic protective film is wound on the winding roller (22) after being pressed by the pressing roller (23) and the winding roller (22); the inlet width of the vacuum pumping mechanism (3) is smaller than the width of the electronic protective film, and the inlet of the vacuum pumping mechanism (3) is centrally distributed on the inner side of the electronic protective film.

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