A film pasting mechanism

Abstract

The utility model relates to the technical field of film attachment, provide a pasting film mechanism for pasting the protective film on the semi -solid coating function film, pasting film mechanism includes: unwinding unit for releasing the protective film, guide unit is located the downstream of unwinding unit for guiding the stable transmission of protective film, the whole single -unit is located the downstream of guide unit, has the mirror surface support roll and the compression roll of opposite arrangement, and the protective film passes between both, mirror surface support roll built -in heating device, can heat to set temperature to soften the protective film bonding layer, the compression roll exerts the pressure, makes the softened bonding layer realize the flow level and the surface reconstruction under the smooth surface support of mirror surface support roll, eliminates uneven, bubble, orange peel and debonding defects, pasting film unit is located the downstream of whole single -unit for the compound attachment of the protective film after shaping with semi -solid coating function film.

Description

Technical Field

[0001] This utility model belongs to the field of film bonding technology, and specifically relates to a film bonding mechanism. Background Technology

[0002] In the manufacturing of high-end functional films, surface protection of functional films with semi-cured coatings (such as semi-cured silicone, semi-cured epoxy resin, etc.) is a critical process. This process requires timely application of the protective film before the coating is fully cured (usually 50% to 70% cured) to prevent scratches, contamination, or coating damage during subsequent processing (such as cutting and transportation).

[0003] Traditional lamination mechanisms generally employ a "direct lamination" method: the unwound protective film and functional film are simultaneously fed into a lamination roller assembly, where they are laminated under pressure. However, this method has the following significant drawbacks:

[0004] First, the protective film is prone to developing tiny wrinkles, wavy edges, or surface depressions during winding, unwinding, and transport. In particular, when pressure-sensitive adhesive (PSA) or hot melt adhesive is used for the adhesive layer, its initial surface morphology will directly affect the final bonding quality.

[0005] Secondly, under high-speed continuous production conditions, the contact time between the protective film and the functional film between the laminating rollers is extremely short (usually less than 0.1 seconds). Even with high pressure, the adhesive layer still cannot flow sufficiently and fill the micro-uneven areas, resulting in defects such as bubbles, orange peel texture, and local delamination after lamination, which seriously affects the product yield.

[0006] More importantly, if an uneven protective film is pressed directly onto a soft and incompletely cured coating, local stress concentration may cause scratches or deformation of the coating, thereby affecting its thickness uniformity and subsequent processing performance.

[0007] Existing technologies mainly rely on the instantaneous pressure of the laminating roller to achieve "passive flattening," lacking the ability to actively regulate the surface state of the protective film, thus making it difficult to achieve high-precision interface lamination control. Utility Model Content

[0008] To address the aforementioned shortcomings of existing technologies, the technical problem this invention aims to solve is to propose a film-applying mechanism. This mechanism, through the establishment of a shaping unit, incorporates an independent "hot-press shaping" process before the protective film and semi-cured coating functional film are bonded. This process involves independently heating and flattening the protective film. Heated mirror support rollers, in conjunction with pressing rollers, apply heat and pressure to the adhesive layer of the protective film, causing it to soften and actively level at high temperatures. Combined with the smooth surface of the mirror rollers, surface reconstruction is achieved, effectively reducing defects such as bonding bubbles, orange peel texture, and localized delamination caused by uneven film surfaces and uneven adhesive layers. This improves the appearance quality and interface bonding reliability of the composite product.

[0009] The technical solution adopted by this utility model to solve its technical problem is to provide a film-applying mechanism for applying a protective film onto a semi-cured coating functional film, wherein the film-applying mechanism includes:

[0010] An unwinding unit, on which the protective film is wound, is used to release the protective film;

[0011] A guide unit, located on the side of the unwinding unit, is used to guide the protective film for smooth transport.

[0012] A shaping unit is disposed to the side of the guiding unit and has a mirror support roller and a pressing roller. The mirror support roller and the pressing roller are arranged opposite to each other, and the protective film passes between them and contacts their surfaces. The mirror support roller is equipped with a heating device inside to heat the mirror support roller to a set temperature to soften the adhesive layer of the protective film. The pressing roller is used to apply pressure to the protective film to make the adhesive layer adhere to the surface of the mirror support roller.

[0013] A film-applying unit is disposed to the side of the shaping unit and is used to laminate the shaped protective film with the semi-cured coating functional film.

[0014] In one of the above-mentioned film application mechanisms, the shaping unit further includes:

[0015] The first support frame, wherein the mirror support roller and the pressing roller are both rotatably mounted on the first support frame;

[0016] A first driving member is disposed on the first support frame, and the pressing roller is connected to the output end of the first driving member. The first driving member is used to drive the pressing roller to move closer to or away from the mirror support roller.

[0017] In one of the above-mentioned film-applying mechanisms, the mirror support roller comprises a stainless steel substrate.

[0018] In one of the above-mentioned film-applying mechanisms, the outer surface of the stainless steel substrate is provided with a hard chrome plating layer.

[0019] In one of the above-mentioned film-applying mechanisms, the surface of the hard chrome plating is coated with a diamond-like carbon coating.

[0020] In the above-mentioned film application mechanism, the shaping unit further includes a cooling component, which is disposed on the first support frame and located on the traction path of the shaped protective film, for cooling and shaping the protective film after hot pressing.

[0021] In the above-mentioned film application mechanism, the first support frame is further provided with a first guide wheel, which is located between the mirror support roller and the cooling component. The protective film after shaping is wrapped around the surface of the first guide wheel to stabilize the conveying path of the protective film.

[0022] In one of the above-mentioned film application mechanisms, the unwinding unit includes:

[0023] Second support frame;

[0024] An unwinding shaft is rotatably mounted on the second support frame, and the protective film is wound around the unwinding shaft;

[0025] The second driving component is mounted on the second support frame and is connected to the unwinding shaft for driving the unwinding shaft to rotate.

[0026] The second guide wheel is located on the side of the unwinding shaft. The unwound protective film is wrapped around the surface of the second guide wheel to guide the unwound protective film into the guide unit.

[0027] In one of the above-mentioned film application mechanisms, the guiding unit includes:

[0028] Third support frame;

[0029] The tensioning roller is rotatably mounted on the third support frame;

[0030] Two guide rollers are respectively mounted on the third support frame and located on both sides of the tension roller;

[0031] The protective film is sequentially wound around a guide roller on one side, a tension roller, and a guide roller on the other side.

[0032] In one of the above-mentioned film application mechanisms, the film application unit includes:

[0033] A fourth support frame is disposed on the side of the shaping unit;

[0034] The first bonding roller, which is rotatably mounted on the fourth support frame, is used to guide and support the semi-cured coating functional film to be bonded.

[0035] The second bonding roller is rotatably mounted on the fourth support frame and located below the first bonding roller. A bonding gap is formed between the second bonding roller and the first bonding roller. The second bonding roller is used to guide and support the protective film to be bonded.

[0036] The third guide wheel is positioned above the first bonding roller and is used to pull the semi-cured coating functional film into the bonding area.

[0037] The fourth guide wheel is located to the side of the second bonding roller and is used to pull the cooled protective film into the bonding area;

[0038] The third driving member is disposed on the fourth support frame, and the second bonding roller is connected to the output end of the third driving member. The third driving member is used to drive the second bonding roller to move closer to or away from the first bonding roller.

[0039] The protective film and the semi-cured coating functional film are simultaneously inserted into the bonding gap between the first bonding roller and the second bonding roller to complete the bonding.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] (1) By setting up the shaping unit, an independent "hot pressing shaping" process is set up before the protective film and the semi-cured coating functional film are bonded together. The protective film is independently heated and flattened. The heated mirror support roller and the pressing roller are used to apply heat and pressure to the adhesive layer of the protective film, so that it softens and actively flows at high temperature. Combined with the smooth surface of the mirror roller, the surface is reconstructed, which effectively reduces defects such as bonding bubbles, orange peel texture and local debonding caused by unevenness of the protective film surface and unevenness of the adhesive layer, and improves the appearance quality and interface bonding reliability of the composite product.

[0042] (2) The mirror support roller adopts a multi-layer composite structure, including a stainless steel substrate, an outer hard chrome plating layer, and an outermost diamond-like carbon (DLC) coating, forming a gradient structure of "substrate-transition layer-functional layer". This structure has high hardness, low friction, excellent wear resistance and chemical stability, which not only extends the service life of the roller surface, but also reduces the risk of adhesion between the adhesive layer and the roller surface, avoids the "roller sticking" phenomenon, and ensures the process stability in continuous production.

[0043] (3) A guide unit is set between the unwinding unit and the shaping unit. This unit forms a stable film-moving path through the coordinated layout of tension rollers and guide rollers, which can buffer tension fluctuations and prevent the film material from shaking or deviating. At the same time, as a transition module between upstream and downstream sections, it effectively isolates the dynamic interference between unwinding tension and shaping traction, supports tension zone control, and improves the stability and response accuracy of the whole machine operation. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the overall structure of this solution.

[0045] Figure 2 This is a schematic diagram of the shaping unit in this scheme.

[0046] Figure 3 This is a structural diagram of the unwinding unit and the guiding unit in this scheme.

[0047] Figure 4 This is a schematic diagram of the film-applying unit in this solution.

[0048] In the diagram, 100 is the unwinding unit; 110 is the second support frame; 120 is the unwinding shaft; 130 is the second drive component; 140 is the second guide wheel; 200 is the guiding unit; 210 is the third support frame; 220 is the tension roller; 230 is the bearing housing; 240 is the guide roller; 300 is the shaping unit; 310 is the mirror support roller; 320 is the pressing roller; 330 is the first support frame; 340 is the first drive component; 350 is the cooling component; 360 is the first guide wheel; 400 is the film-applying unit; 410 is the fourth support frame; 420 is the first bonding roller; 430 is the second bonding roller; 440 is the third guide wheel; 450 is the fourth guide wheel; and 460 is the third drive component. Detailed Implementation

[0049] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0050] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0051] like Figures 1 to 4 As shown, this solution provides a film-applying mechanism for applying a protective film onto a semi-cured coating functional film. The film-applying mechanism includes: an unwinding unit 100, on which the protective film is wound and released; a guiding unit 200, located to the side of the unwinding unit 100, for guiding the protective film for smooth transport, achieving path alignment and tension buffering; and a shaping unit 300, located to the side of the guiding unit 200, which includes a mirror support roller 310 and a pressing roller 320. Roller 310 and pressing roller 320 are arranged opposite to each other, and the protective film passes between them and contacts their surfaces; wherein, the mirror support roller 310 is equipped with a heating device inside, which is used to heat the mirror support roller 310 to a set temperature to soften the adhesive layer of the protective film; the pressing roller 320 is used to apply pressure to the protective film, so that the adhesive layer adheres to the surface of the mirror support roller 310; the film application unit 400 is arranged to the side of the shaping unit 300, and is used to composite and laminate the shaped protective film with the semi-cured coating functional film.

[0052] During operation, the protective film is pre-wound in roll form onto the unwinding unit 100 and released from the unwinding unit 100 before entering the guiding unit 200. Guided by the guiding unit 200, the released protective film is transported along a predetermined path, achieving precise control of the film's direction and path stability.

[0053] The protective film, after passing through the guide unit 200, is continuously drawn to the shaping unit 300. The shaping unit 300 includes a mirror support roller 310 and a pressing roller 320 arranged opposite each other, forming a narrow shaping gap between them. The mirror support roller 310 is equipped with a heating device. When energized or supplied with a heat medium, this heating device transfers heat to the roller body, causing its surface temperature to gradually rise and stabilize within a set temperature range. This temperature range can be adjusted according to the material properties of the protective film adhesive layer to ensure that the adhesive layer reaches an ideal softening state during subsequent shaping processes.

[0054] When the protective film passes through the shaping gap between the mirror support roller 310 and the pressing roller 320, the side with the adhesive layer comes into close contact with and adheres to the high-temperature surface of the mirror support roller 310. Simultaneously, the pressing roller 320 applies controllable pressure to the protective film, subjecting it to uniform pressing force. Under the combined action of this high temperature and pressure, the adhesive layer softens and enters a highly fluid state. Its surface, constrained by the surface of the mirror support roller 310, achieves full leveling, forcibly filling microscopic depressions, ripples, or uneven areas, thus achieving surface leveling and shaping, resulting in a smooth surface.

[0055] After shaping, the protective film is fed into the lamination unit 400. Simultaneously, the semi-cured coating functional film is also conveyed to the lamination unit 400. The lamination unit 400 completes the lamination of the shaped protective film and the semi-cured coating functional film in a bubble-free and gap-free state. Because the adhesive layer surface of the protective film has been hot-pressed and shaped in the previous process, the contact surface with the functional film is highly matched during the lamination process, significantly reducing the risk of air retention at the interface and avoiding defects such as bubbles, orange peel texture, and localized delamination. Ultimately, a high-quality composite film material with optical uniformity and strong interfacial bonding is obtained.

[0056] The heating device may include a multi-loop spiral heat transfer oil channel, which is uniformly distributed along the axial direction of the mirror support roller 310. The heat transfer medium (such as heat transfer oil) flows through the channel under the drive of a circulating pump, thereby achieving temperature uniformity control of the roller body in both the circumferential and axial directions. Alternatively, the heating device may also employ a built-in electric heating rod, ceramic heating element, or electromagnetic induction heating system to directly heat the mirror support roller 310, which is suitable for rapid start-up and shutdown conditions requiring high response speed.

[0057] In summary, the film-applying mechanism in this solution performs an independent "hot pressing and shaping" process before application, which heats and flattens the protective film independently. The heated mirror support roller 310 works in conjunction with the pressing roller 320 to apply heat and pressure to the adhesive layer of the protective film, causing it to soften and actively level at high temperatures. Combined with the smooth surface of the mirror roller, surface reconstruction is achieved, effectively reducing defects such as bonding bubbles, orange peel texture, and local delamination caused by unevenness of the protective film surface and unevenness of the adhesive layer, thus improving the appearance quality and interface bonding reliability of the composite product.

[0058] More preferably, the shaping unit 300 further includes: a first support frame 330, on which the mirror support roller 310 and the pressing roller 320 are rotatably mounted; and a first driving member 340, which is disposed on the first support frame 330 and whose output end is connected to the pressing roller 320, for driving the pressing roller 320 to move closer to or away from the mirror support roller 310, thereby adjusting the bonding pressure between the two or realizing separation between the rollers, which facilitates the film threading operation.

[0059] By incorporating a first support frame 330 and a first driving member 340 within the shaping unit 300, controllable pressure application and flexible clearance of the pressing roller 320 are achieved, offering the following significant advantages: First, the first driving member 340 can precisely control the pressure applied by the pressing roller 320 to the protective film. By adjusting the output force of the first driving member 340, the bonding requirements of protective films and their adhesive layers of different thicknesses and materials can be adapted, ensuring uniform and stable pressure during the shaping process and preventing localized overpressure leading to film damage or insufficient pressure leading to inadequate leveling.

[0060] Secondly, before starting the equipment or when changing the protective film roll, the first drive unit 340 can drive the pressing roller 320 away from the mirror support roller 310, forming a sufficient gap for film insertion. Operators can easily insert the protective film into the shaping unit 300, avoiding difficulties in insertion or tearing of the film edge due to insufficient gap between rollers. This gap-separation function significantly improves the ease of operation and maintenance efficiency of the equipment. The first drive unit 340 can be a motor, cylinder, or electromagnet.

[0061] More preferably, the mirror support roller 310 comprises a stainless steel substrate, the outer surface of which is sequentially coated with a hard chrome plating layer and a diamond-like carbon (DLC) coating, forming a multi-layer composite functional structure of "substrate-functional transition layer-high-performance surface layer". This structure significantly improves the overall service performance of the mirror support roller 310 in high-speed, continuous production environments through the progressive enhancement of material properties and functional complementarity.

[0062] Specifically, the stainless steel substrate, after precision grinding, provides excellent mechanical strength, dimensional stability, and basic corrosion resistance. An electrodeposited hard chromium plating layer on its surface significantly enhances wear resistance and scratch resistance, and serves as an excellent adhesion transition layer for the diamond-like carbon (DLC) coating, effectively mitigating thermal expansion mismatch between the substrate and the coating and improving interfacial adhesion. The outermost layer of deposited DLC coating further increases surface hardness, giving the mirror support roller 310 an ultra-long service life. Simultaneously, the DLC coating possesses low-friction characteristics similar to graphite, significantly reducing the adhesion between the protective film and adhesive layer and the mirror support roller 310 surface, effectively preventing "roller sticking" and ensuring smooth peeling of the protective film during traction, avoiding stringing, tearing, or surface damage, achieving excellent demolding performance.

[0063] Furthermore, this composite structure achieves an ultra-smooth mirror surface with Ra≤0.03μm, which is resistant to oxidation, scratches, or adsorption of organic residues during long-term operation, continuously ensuring the surface smoothness and optical quality of the protective film. The diamond-like carbon coating also possesses excellent chemical inertness, resisting corrosion from pressure-sensitive adhesive residues, cleaning solvents, and environmental moisture. The synergistic effect of the excellent thermal conductivity of the stainless steel substrate and the diamond-like carbon coating helps to rapidly dissipate locally accumulated heat during hot pressing, preventing hot spot formation, improving temperature field uniformity, and preventing premature cross-linking or rheological instability of the adhesive layer due to local overheating.

[0064] To prevent the adhesive layer from re-adheding or deforming due to residual high temperature after shaping, the shaping unit 300 also includes a cooling component 350, which is mounted on the first support frame 330 and located on the traction path of the shaped protective film. This component cools and shapes the protective film after hot-pressing. The cooling component 350 rapidly cools and shapes the hot-pressed protective film, restoring the adhesive layer to a stable state, maintaining a smooth surface after shaping, and preventing stress relaxation or localized collapse due to residual heat, thus ensuring the surface smoothness is maintained. The cooling component 350 is preferably a cooling air knife.

[0065] To stabilize the transport path of the shaped protective film, a first guide wheel 360 is also provided on the first support frame 330. Located between the mirror support roller 310 and the cooling component 350, the shaped protective film passes over the surface of the first guide wheel 360. The first guide wheel 360 stabilizes the transmission tension of the protective film, effectively preventing wrinkling, stretching, or loosening of the film surface due to tension fluctuations, ensuring the flatness and consistency of the subsequent lamination process. Secondly, since the first guide wheel 360 is located upstream of the cooling component 350, it can establish a stable film surface tension before cooling, preventing vibration, shaking, or localized deformation caused by high-speed airflow impact, thereby ensuring a uniform and controllable cooling process and improving the shaping effect.

[0066] More preferably, the unwinding unit 100 includes a second support frame 110, an unwinding shaft 120, a second drive component 130, and a second guide wheel 140. The unwinding shaft 120 is rotatably mounted on the second support frame 110, and the protective film is wound around the unwinding shaft 120. The second drive component 130 is connected to the unwinding shaft 120 via a synchronous belt to achieve precise speed and torque control. The second guide wheel 140 is located on the downstream side of the unwinding shaft 120. After being unwound, the protective film is covered by the guide wheel and guided to the lower guide unit 200 to guide the film material to run smoothly, achieve orientation of the transmission path, and assist in centering.

[0067] The second drive unit 130 drives the unwinding shaft 120 to rotate and coordinates with the downstream traction system to achieve continuous release and constant tension operation of the membrane material, effectively avoiding tension fluctuations caused by changes in roll diameter and preventing membrane material from loosening, wrinkling, or excessive stretching. The second guide wheel 140, combined with a reasonable wrap angle design, can effectively suppress membrane width vibration and slight deviation, improving the stability of membrane material transmission. The second drive unit 130 can be a motor, hydraulic cylinder, or pneumatic cylinder.

[0068] More preferably, the guiding unit 200 includes a third support frame 210, a tension roller 220, and two guide rollers 240. The tension roller 220 is rotatably mounted on the third support frame 210 via a bearing seat 230, which is adjustablely connected to the third support frame 210 via bolts and can move up and down in the vertical direction. The two guide rollers 240 are respectively fixedly mounted on the third support frame 210 and located on both sides of the tension roller 220. The protective film passes sequentially around the guide roller 240 on one side, the tension roller 220, and the guide roller 240 on the other side, thereby achieving path guidance and tension buffering of the film material.

[0069] By adjusting the position of the bearing seat 230 on the third support frame 210, the height of the tension roller 220 can be flexibly adjusted, thereby changing the wrap angle of the film material on the tension roller 220 or the preset tension to meet the requirements of different film widths, thicknesses, and process tensions. The guide rollers 240 on both sides work together with the tension roller 220 to form a stable film-feeding channel. With a reasonable wrap angle design, it effectively suppresses defects such as film material deviation, shaking, wrinkles, and edge wavy lines, ensuring that the protective film enters the subsequent shaping section in a smooth and centered manner. As a key transition module between the unwinding unit 100 and the shaping unit 300, the guide unit 200 effectively isolates tension interference between upstream and downstream sections, realizes tension zone management, and avoids film surface damage caused by speed fluctuations or start-stop processes.

[0070] More preferably, the laminating unit 400 includes a fourth support frame 410, a first laminating roller 420, a second laminating roller 430, a third guide wheel 440, a fourth guide wheel 450, and a third driving member 460. The fourth support frame 410 is disposed on the side of the shaping unit 300; the first laminating roller 420 and the second laminating roller 430 are rotatably mounted on the fourth support frame 410 and arranged vertically opposite each other, forming an adjustable laminating gap between them; wherein, the first laminating roller 420 is used to guide and support the semi-cured coating functional film, and the second laminating roller 430 is used to guide and support the cooled and shaped protective film; the first laminating roller 420 and the second laminating roller 430 roll against each other under pressure to complete the lamination of the protective film and the semi-cured coating functional film.

[0071] The third guide wheel 440 is positioned above the upstream side of the first bonding roller 420 to guide the semi-cured coating functional film smoothly into the bonding area. The fourth guide wheel 450 is positioned on the upstream side of the second bonding roller 430 to guide the protective film to center itself into the bonding area, ensuring edge alignment and tension matching between the two films before bonding. The third drive unit 460 is mounted on the fourth support frame 410, and its output end is connected to the second bonding roller 430 to drive the second bonding roller 430 closer to or further away from the first bonding roller 420, thereby adjusting the bonding pressure and gap. The third drive unit 460 can be a motor, a cylinder, or an electromagnet.

[0072] During operation, the cooled and shaped protective film is output from the shaping unit 300 and guided by the fourth guide roller 450 into the lamination area; the semi-cured coating functional film is conveyed by an independent feeding system and guided by the third guide roller 440 before being synchronously conveyed to the lamination area. The two films are precisely laminated in the lamination gap between the first lamination roller 420 and the second lamination roller 430 under pressure and traction.

[0073] Downstream of the laminating unit 400, a winding device and a traction system are also provided for winding up the laminated film. The structure and working principle of the winding device and the traction system are well known in the art and can be conventionally configured, so they will not be described in detail here.

[0074] It should be noted that in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly defined. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly defined. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0075] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0076] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A film-applying mechanism for applying a protective film to a semi-cured coating functional film, characterized in that, The film application mechanism includes: An unwinding unit, on which the protective film is wound, is used to release the protective film; A guide unit, located on the side of the unwinding unit, is used to guide the protective film for smooth transport. A shaping unit is disposed to the side of the guiding unit and has a mirror support roller and a pressing roller. The mirror support roller and the pressing roller are arranged opposite to each other, and the protective film passes between them and contacts their surfaces. The mirror support roller is equipped with a heating device inside to heat the mirror support roller to a set temperature to soften the adhesive layer of the protective film. The pressing roller is used to apply pressure to the protective film to make the adhesive layer adhere to the surface of the mirror support roller. A film-applying unit is disposed to the side of the shaping unit and is used to laminate the shaped protective film with the semi-cured coating functional film.

2. The film-applying mechanism as described in claim 1, characterized in that, The shaping unit further includes: The first support frame, wherein the mirror support roller and the pressing roller are both rotatably mounted on the first support frame; A first driving member is disposed on the first support frame, and the pressing roller is connected to the output end of the first driving member. The first driving member is used to drive the pressing roller to move closer to or away from the mirror support roller.

3. The film-applying mechanism as described in claim 1, characterized in that, The mirror support roller comprises a stainless steel base.

4. The film-applying mechanism as described in claim 3, characterized in that, The outer surface of the stainless steel substrate is provided with a hard chrome plating layer.

5. The film-applying mechanism as described in claim 4, characterized in that, The surface of the hard chrome plating is coated with a diamond-like carbon coating.

6. The film-applying mechanism as described in claim 2, characterized in that, The shaping unit also includes a cooling component, which is disposed on the first support frame and located on the traction path of the shaped protective film, for cooling and shaping the protective film after hot pressing.

7. The film-applying mechanism as described in claim 6, characterized in that, The first support frame is also provided with a first guide wheel, which is located between the mirror support roller and the cooling component. The protective film after shaping is wrapped around the surface of the first guide wheel to stabilize the conveying path of the protective film.

8. The film-applying mechanism as described in claim 1, characterized in that, The unwinding unit includes: Second support frame; An unwinding shaft is rotatably mounted on the second support frame, and the protective film is wound around the unwinding shaft; The second driving component is mounted on the second support frame and is connected to the unwinding shaft for driving the unwinding shaft to rotate. The second guide wheel is located on the side of the unwinding shaft. The unwound protective film is wrapped around the surface of the second guide wheel to guide the unwound protective film into the guide unit.

9. The film-applying mechanism as described in claim 1, characterized in that, The guiding unit includes: Third support frame; The tensioning roller is rotatably mounted on the third support frame; Two guide rollers are respectively mounted on the third support frame and located on both sides of the tension roller; The protective film is sequentially wound around a guide roller on one side, a tension roller, and a guide roller on the other side.

10. The film-applying mechanism as described in claim 1, characterized in that, The film application unit includes: A fourth support frame is disposed on the side of the shaping unit; The first bonding roller, which is rotatably mounted on the fourth support frame, is used to guide and support the semi-cured coating functional film to be bonded. The second bonding roller is rotatably mounted on the fourth support frame and located below the first bonding roller. A bonding gap is formed between the second bonding roller and the first bonding roller. The second bonding roller is used to guide and support the protective film to be bonded. The third guide wheel is positioned above the first bonding roller and is used to pull the semi-cured coating functional film into the bonding area. The fourth guide wheel is located to the side of the second bonding roller and is used to pull the cooled protective film into the bonding area; The third driving member is disposed on the fourth support frame, and the second bonding roller is connected to the output end of the third driving member. The third driving member is used to drive the second bonding roller to move closer to or away from the first bonding roller. The protective film and the semi-cured coating functional film are simultaneously inserted into the bonding gap between the first bonding roller and the second bonding roller to complete the bonding.

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