Automobile exterior decoration TOM film and salt spray testing device thereof

Abstract

The invention relates to an automobile exterior TOM film and a salt spray testing device thereof, and relates to the technical field of decorative films. The automobile exterior decoration TOM film comprises a surface protection layer, a decoration layer, a bonding layer, a substrate and a back glue layer which are sequentially arranged, the automobile exterior TOM film salt mist testing device comprises a salt mist reaction kettle, a salt mist plate is arranged in the salt mist reaction kettle, and a mist making piece is further arranged in the salt mist reaction kettle; the salt mist plate can rapidly clamp the automobile exterior decoration TOM film, and the clamping stability of the automobile exterior decoration TOM film can be greatly improved while rapid installation is achieved; furthermore, the salt spray test can be carried out on automobile exterior decoration TOM films with different sizes, so that the applicability of the device is greatly improved; the mist making piece can automatically spray salt mist into the salt mist reaction kettle and can also control the concentration of the sprayed salt mist, so that the corrosion resistance of the automobile exterior TOM film in salt mist environments with different concentrations is detected.

Description

Technical Field

[0001] The invention relates to the technical field of decorative films, and in particular to an automobile exterior TOM film and a salt spray testing device thereof. Background Art

[0002] Automotive exterior TOM film is a coating material designed specifically for automotive exteriors. Its main purpose is to enhance the appearance and texture of the car through surface decoration. TOM film is an out-of-mold decoration technology that uses vacuum forming or thermal transfer to tightly fit a film coated with an adhesive onto the surface of an automotive exterior part to achieve a decorative effect.

[0003] After the automotive exterior TOM film is formed, it cannot be directly used for the decoration of the car surface. It needs to be strictly tested for performance to ensure the quality and stability of the automotive exterior TOM film, and to ensure that the automotive exterior TOM film can be used for a long time and maintain its optimal performance.

[0004] For example, a Chinese patent with publication number CN208091881U discloses a salt spray test chamber, including a chamber and a control cabinet connected to the chamber, a first sample rack is provided on two opposite inner walls of the chamber, arc-shaped slots are provided on the first sample rack at equal intervals, the two ends of the sample rod are placed in the slots, a plurality of second sample racks are provided below the first sample rack, a mounting plate is placed on the second sample rack, the mounting plate is placed above the second sample rack, a plurality of parallel and obliquely arranged sample slots are provided on the mounting plate, and sheet samples are placed in the sample slots. Secondly, since a second sample rack is provided and a mounting plate is placed on the second sample rack, thin film samples that need to be placed obliquely can be tested.

[0005] However, the above-mentioned salt spray test chamber still has some shortcomings in actual use:

[0006] 1. The existing device can test oblique film samples during testing, but the oblique angle of the oblique film samples is single, and it is impossible to test the film at different angles, so it has a certain degree of singleness, which indirectly leads to poor detection results.

[0007] 2. Furthermore, in the prior art, when the sample is exposed to a salt spray environment and subjected to a salt spray test, both ends of the sample will be in contact with the salt spray. Therefore, when the sample is perforated in the salt spray environment, it is impossible to accurately determine whether the corrosion resistance of the outermost protective layer of the sample is poor, or whether the corrosion on the innermost side of the sample affects the protective effect of the outermost protective layer of the sample, resulting in it failing to play a corrosion-resistant role.

[0008] 3. Then, in the prior art, when the sample is tested in a salt spray environment, salt spray is continuously sprayed to maintain the salt spray environment, but this will greatly waste resources and cannot adjust the salt spray concentration, resulting in a single function of the device for salt spray testing.

[0009] Therefore, based on the above-stated viewpoints, there is still room for improvement in the existing salt spray test equipment. Summary of the invention

[0010] In order to solve the above problems, the present invention provides a TOM film for automobile exterior and a salt spray test device thereof, which adopts the following technical solutions:

[0011] In a first aspect, the present application provides a TOM film for automobile exterior, comprising a surface protection layer, a decorative layer, an adhesive layer, a substrate and an adhesive layer arranged in sequence from top to bottom.

[0012] In a second aspect, the present application provides a salt spray test device for a TOM film on an automobile exterior, the salt spray test device for a TOM film on an automobile exterior comprising a stationary salt spray reactor, a self-sealing cover being hingedly connected to the salt spray reactor.

[0013] The salt spray reactor is provided with a salt spray plate for testing the surface protection layer and the adhesive layer of the automobile exterior TOM film respectively, and the bottom of the salt spray reactor is also provided with a fogging member for spraying salt spray on the automobile exterior TOM film clamped on the salt spray plate.

[0014] Preferably, a linkage lifting component is further provided between the salt spray reactor and the salt spray plate, the linkage lifting component comprises a lifting bracket of a rectangular structure, the lifting bracket is slidably distributed along the height direction of the salt spray reactor, and the salt spray plate is hinged to the middle part of the lifting bracket.

[0015] A lifting rack is integrated on one side of the lifting bracket, a first gear is meshed on the lifting rack, the first gear rotates on the inner wall of the salt spray reactor, the first gear is connected to a second gear rotatably arranged on the outer wall of the salt spray reactor through a synchronous shaft, the second gear is meshed with a linkage gear arc plate, and one side of the linkage gear arc plate is installed on the side wall of the cover.

[0016] Preferably, an arc groove is provided in the middle of the linkage tooth arc plate, and a limiting arc block is provided at one end of the salt spray reactor close to the linkage tooth arc plate, and the linkage tooth arc plate is slidably arranged on the limiting arc block on the outer wall of the salt spray reactor through the arc groove.

[0017] Preferably, the salt spray plate is also provided with a working area for installing the automobile exterior TOM film and performing salt spray testing. The salt spray plate is also symmetrically provided with strip slide grooves in the height direction. A plurality of clamping plates for clamping the automobile exterior TOM film are slidably installed in the strip slide grooves. Fixed clamping magnets are installed at equal intervals on the clamping plates, and movable magnets are correspondingly installed on the clamping magnets of the clamping plates.

[0018] Preferably, the salt spray plate is also provided with a quick-release portion, which includes movable grooves symmetrically opened on both sides of the length direction of the salt spray plate, a telescopic clamping column is slidably provided in the movable groove of the salt spray plate, a clamping compression spring placed in the movable groove is provided between the clamping column and the salt spray plate, a pressing handle is provided at one end of the clamping column close to the clamping compression spring, the pressing handle is slidably arranged on the salt spray plate, and a pressing groove for the pressing handle to slide is provided on the salt spray plate.

[0019] Preferably, a clamping circular hole is provided on the lifting bracket; and an inclined structure is provided at the bottom of the clamping column.

[0020] Preferably, an angle adjustment component for adjusting the angle of the salt spray plate is provided between the salt spray reactor and the clamping column on the salt spray plate, the angle adjustment component comprises an angle adjustment cylinder rotatably arranged in the clamping circular hole of the lifting bracket, the inner side of the angle adjustment cylinder is a serrated structure, the clamping column is provided with an assembly gear meshing with the angle adjustment cylinder, an angle adjustment worm wheel is installed at one end of the angle adjustment cylinder away from the clamping column, an angle adjustment worm gear is meshed on the angle adjustment worm wheel, and the angle adjustment worm gear and the angle adjustment worm gear are both arranged on the lifting bracket.

[0021] Preferably, two sets of telescopic adjustment plates with adjustable distances are further provided at both ends of the salt spray plate in the height direction, and the telescopic adjustment plates are arranged at equal intervals on the salt spray reactor.

[0022] Preferably, the mist-generating element includes a storage box for storing salt solution, the storage box is arranged on the outer side wall of the salt spray reactor, and the storage box is connected to a spray head for spraying salt mist into the salt spray reactor through a pipe extending outward, and the spray head is arranged inside the closed cylinder, and the closed cylinder is rotatably arranged at the bottom of the inner side of the salt spray reactor.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The salt spray plate of the present invention can quickly clamp the automobile exterior TOM film, and can greatly improve the stability of the automobile exterior TOM film clamping while quickly installing it; further, it can also perform salt spray tests on automobile exterior TOM films of different sizes, greatly improving the applicability of the device.

[0025] 2. The linkage lifting component of the present invention cooperates with the salt spray plate, which can not only facilitate the rapid clamping of the automobile exterior TOM film, but also automatically realize the lifting and lowering of the salt spray plate when opening and closing the cover, which is convenient for people of different heights to adjust the height of the salt spray plate, and improves the convenience of installing the automobile exterior TOM film. At the same time, when the cover is closed, the salt spray plate and the automobile exterior TOM film clamped at its upper end automatically descend to the designated area, which greatly improves the rapid placement of the automobile exterior TOM film and avoids the automobile exterior TOM film from affecting the accuracy of its salt spray test due to position offset.

[0026] 3. The salt spray plate of the present invention can also adjust its angle, and detect the TOM film of automobile exterior by performing salt spray tests at different angles to detect its corrosion resistance.

[0027] 4. The cooperation between the salt spray plate and the telescopic adjustment plate in the present invention can selectively cover the two surfaces of the clamped automobile exterior TOM film, ensuring that when the salt spray test is carried out, the surface protection layer of the automobile exterior TOM film is subjected to the salt spray test alone, and the adhesive layer of the automobile exterior TOM film is covered to avoid affecting the corrosion resistance of the surface protection layer of the automobile exterior TOM film. Similarly, the surface protection layer of the automobile exterior TOM film can also be covered to test whether the adhesive layer of the automobile exterior TOM film will affect the corrosion resistance of the surface protection layer of the automobile exterior TOM film.

[0028] 5. The fog-making element of the present invention can automatically spray salt mist into the salt spray reactor, and can also control the concentration of the sprayed salt mist, so as to detect the corrosion resistance of the automobile exterior TOM film in salt spray environments of different concentrations, which greatly improves the diversity of the schemes of the device for detecting the corrosion resistance of the automobile exterior TOM film, thereby indirectly improving the function of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0030] Figure 1 It is a schematic diagram of the main structure of the automobile exterior TOM film and salt spray testing device of the present invention from the first perspective.

[0031] Figure 2 It is a schematic diagram of the main structure of the automobile exterior TOM film and salt spray testing device of the present invention from a second viewing angle.

[0032] Figure 3 It is a schematic diagram of the structure between the salt spray plate and the linkage lifting component of the present invention from a first perspective.

[0033] Figure 4 It is a second perspective structural schematic diagram of the salt spray plate and the linkage lifting component of the present invention.

[0034] Figure 5It is a schematic diagram of the structure between the salt spray plate and the angle adjustment component of the present invention.

[0035] Figure 6 It is a schematic diagram of the structure between the quick-release part and the salt spray plate of the present invention.

[0036] Figure 7 It is a schematic diagram of the structure among the lifting bracket, the clamping circular hole and the angle adjustment cylinder of the present invention.

[0037] Figure 8 It is a schematic diagram of the structure between the telescopic adjustment plate and the salt spray plate of the present invention.

[0038] Fig. 9 It is a structural schematic diagram of the fog-making element of the present invention.

[0039] Fig.10 It is a first-view structural schematic diagram of the salt spray amount adjustment of the present invention.

[0040] Fig.11 It is a second viewing angle structural schematic diagram of the salt spray amount adjustment of the present invention.

[0041] Fig.12 It is a structural explosion diagram of the salt spray amount adjustment of the present invention.

[0042] Fig.13 It is a schematic diagram of the structure between the linkage ring and the concave-convex linkage groove of the present invention.

[0043] Fig.14 It is a schematic structural diagram of the automobile exterior TOM film of the present invention.

[0044] Description of the accompanying drawings: A, automobile exterior TOM film; 10, surface protection layer; 11, decorative layer; 12, adhesive layer; 13, base material; 14, adhesive layer; 2, salt spray reactor; 20, cover; 4, salt spray plate; 5, fogging member; 3, linkage lifting component; 30, lifting bracket; 31, lifting rack; 32, No. 1 gear; 33, No. 2 gear; 34, linkage gear arc plate; 35, arc groove; 36, limit arc block; 50, storage box; 51, spray head; 52, closing cylinder; 53, driving motor; 54, second gear; 55, first gear; 520, lifting column; 52 1. Cover plate; 523. Reset tension spring; 524. Linkage ring; 525. Concave-convex linkage groove; 526. Linkage block; 527. Linkage rod; 528. Mist volume adjustment rod; 529. Mist volume adjustment block; 40. Working area; 41. Strip slide groove; 42. Clamping plate; 43. Clamping magnet; 44. Movable magnet; 6. Quick release part; 60. Movable groove; 61. Snap-on column; 62. Snap-on compression spring; 63. Pressing handle; 64. Snap-on round hole; 7. Angle adjustment component; 70. Angle adjustment cylinder; 71. Assembly gear; 72. Angle adjustment worm wheel; 73. Angle adjustment worm; 45. Telescopic adjustment plate. DETAILED DESCRIPTION

[0045] The following is combined with Figure 1-Figure 14 This application is described in further detail.

[0046] The embodiments of the present application disclose an automobile exterior TOM film and a salt spray testing device thereof; firstly, it relates to an automobile exterior TOM film, and secondly, it also relates to an automobile exterior TOM film salt spray testing device for the above-mentioned automobile exterior TOM film A.

[0047] With respect to the existing salt spray testing device for automobile exterior TOM film, the existing salt spray testing device for automobile exterior TOM film places automobile exterior TOM film A directly into the salt spray reactor 2 so that both its surface protection layer 10 and the back adhesive layer 14 are exposed to the salt spray. In this way, when the automobile exterior TOM film A is perforated or torn, it will be impossible to determine whether the surface protection layer 10 of the automobile exterior TOM film A is of poor quality and its corrosion resistance can no longer meet the requirements; or whether the back adhesive layer 14 of the automobile exterior TOM film A reacts in the salt spray and has problems, causing its surface protection layer 10 to be affected by a chain reaction and have problems.

[0048] Therefore, the present application can strictly control the only variable, and can perform a salt spray corrosion resistance test on the surface protection layer 10 of the automobile exterior TOM film A alone; it can also perform a salt spray corrosion resistance test on the back adhesive layer 14 of the automobile exterior TOM film A alone, and compare the two to improve the accuracy of the automobile exterior TOM film A detection.

[0049] See also Fig.14 As shown, a TOM film for automobile exterior decoration comprises a surface protection layer 10, a decorative layer 11, an adhesive layer 12, a base material 13 and a backing layer 14 which are arranged in sequence from top to bottom.

[0050] It should be noted that the material of the surface protection layer 10 of the automobile exterior TOM film A is PVDF / PMMA co-extruded film / PMMA co-extruded film. The appearance effects of the PVDF / PMMA co-extruded film / PMMA co-extruded film can be divided into: high gloss, flat gloss, and matte gloss according to the glossiness.

[0051] The material of the decoration layer 11 is ink or metal plating or a laminated combination of the two materials.

[0052] The adhesive layer 12 is a two-component polyurethane system.

[0053] The substrate 13 can be selected from ABS, PC or PVC.

[0054] The material of the backing layer 14 may include polyacrylate, polymethacrylate, polycarbonate, polyurethane, polyester, polyamide, chloroacetic resin, epoxy resin, ethylene-vinyl acetate copolymer, styrene-acrylonitrile-acrylic rubber copolymer, acrylonitrile-styrene copolymer, methyl methacrylate-acrylonitrile-butadiene-styrene copolymer, polystyrene, methyl methacrylate-styrene or thermoplastic elastomer or at least one of the copolymers, mixtures or composites of the above materials.

[0055] The automobile exterior TOM film A is mainly composed of the above materials. The preparation method of the automobile exterior TOM film A is as follows:

[0056] (1) The decorative layer 11 is provided on the surface protection layer 10 PVDF / PMMA co-extruded film by using one or more of the processes such as gravure printing, screen printing, evaporation, sputtering, etc.

[0057] (2) The adhesive layer 12 is provided on the decorative layer 11 by using a micro-concave coating method or the like, and the organic solvent in the adhesive layer 12 is removed by heat drying.

[0058] (3) The base material 13 and the adhesive layer 12 are laminated by a hot laminating roller.

[0059] (4) A back adhesive layer 14 is coated on the back side of the substrate 13 .

[0060] (4) The finished product obtained above is cured, rolled up and cut to obtain the automotive exterior TOM film A.

[0061] The present application discloses a TOM film for automobile exterior, comprising a surface protection layer 10, a decorative layer 11, an adhesive layer 12, a base material 13, and an adhesive layer 14 arranged in order from top to bottom. The automobile exterior TOM film A not only meets the decorative properties of automobile exterior, but also can withstand the harsh automobile exterior use environment because the surface protection layer 10 uses a PVDF / PMMA co-extruded film material with better comprehensive performance.

[0062] Embodiment 1:

[0063] (1) Printing ink on the surface protection layer 10 PVDF / PMMA co-extruded film by gravure printing as the decorative layer 11; wherein the thickness of the PVDF / PMMA co-extruded film is 30 μm.

[0064] (2) An adhesive layer 12 is provided on the decorative layer 11 by using a micro-concave coating method or the like, and the organic solvent in the adhesive layer 12 is removed by heat drying; the adhesive layer 12 after drying has a thickness of 8 μm.

[0065] (3) The base material 13 ABS and the adhesive layer 12 are laminated by a hot laminating roller; wherein the thickness of the ABS is 400 μm.

[0066] (4) A back adhesive layer 14 is provided on the back of the substrate 13 ABS, and the organic solvent in the adhesive layer 12 is removed by heat drying; the adhesive layer 12 after drying has a thickness of 15 μm.

[0067] (5) The finished product obtained above is ripened, rolled up and slit in sequence to obtain the prepared automotive exterior TOM film A.

[0068] Embodiment 2:

[0069] (1) Printing ink on the surface protection layer 10 PVDF / PMMA co-extruded film by gravure printing as the decorative layer 11; wherein the thickness of the PVDF / PMMA co-extruded film is 30 μm.

[0070] (2) An adhesive layer 12 is provided on the decorative layer 11 by using a micro-concave coating method or the like, and the organic solvent in the adhesive layer 12 is removed by heat drying; the adhesive layer 12 after drying has a thickness of 8 μm.

[0071] (3) The base material 13PC and the adhesive layer 12 are laminated by a hot laminating roller; wherein the thickness of PC is 400 μm.

[0072] (4) A back adhesive layer 14 is provided on the back of the substrate 13PC, and the organic solvent in the adhesive layer 12 is removed by heat drying; the adhesive layer 12 after drying has a thickness of 15 μm.

[0073] (5) The finished product obtained above is ripened, rolled up and slit in sequence to obtain the prepared automotive exterior TOM film A.

[0074] Embodiment three:

[0075] (1) Printing ink on the surface protection layer 10 PVDF / PMMA co-extruded film by gravure printing as the decorative layer 11; wherein the thickness of the PVDF / PMMA co-extruded film is 50 μm.

[0076] (2) An adhesive layer 12 is provided on the decorative layer 11 by using a micro-concave coating method or the like, and the organic solvent in the adhesive layer 12 is removed by heat drying; the adhesive layer 12 after drying has a thickness of 8 μm.

[0077] (3) The base material 13 ABS and the adhesive layer 12 are laminated by a hot laminating roller; wherein the thickness of the ABS is 400 μm.

[0078] (4) A back adhesive layer 14 is provided on the back of the substrate 13 ABS, and the organic solvent in the adhesive layer 12 is removed by heat drying; the adhesive layer 12 after drying has a thickness of 15 μm.

[0079] (5) The finished product obtained above is ripened, rolled up and slit in sequence to obtain the prepared automotive exterior TOM film A.

[0080] Embodiment 4:

[0081] (1) Printing ink on the surface protection layer 10 PVDF / PMMA co-extruded film by gravure printing as the decorative layer 11; wherein the thickness of the PVDF / PMMA co-extruded film is 30 μm.

[0082] (2) An adhesive layer 12 is provided on the decorative layer 11 by using a micro-concave coating method or the like, and the organic solvent in the adhesive layer 12 is removed by heat drying; the adhesive layer 12 after drying has a thickness of 12 μm.

[0083] (3) The base material 13 ABS and the adhesive layer 12 are laminated by a hot laminating roller; wherein the thickness of the ABS is 400 μm.

[0084] (4) A back adhesive layer 14 is provided on the back of the substrate 13 ABS, and the organic solvent in the adhesive layer 12 is removed by heat drying; the adhesive layer 12 after drying has a thickness of 15 μm.

[0085] (5) The finished product obtained above is ripened, rolled up and slit in sequence to obtain the prepared automotive exterior TOM film A.

[0086] Embodiment five:

[0087] (1) Printing ink on the surface protection layer 10 PVDF / PMMA co-extruded film by gravure printing as the decorative layer 11; wherein the thickness of the PVDF / PMMA co-extruded film is 30 μm.

[0088] (2) An adhesive layer 12 is provided on the decorative layer 11 by using a micro-concave coating method or the like, and the organic solvent in the adhesive layer 12 is removed by heat drying; the adhesive layer 12 after drying has a thickness of 8 μm.

[0089] (3) The base material 13 ABS and the adhesive layer 12 are laminated by a hot laminating roller; wherein the thickness of the ABS is 300 μm.

[0090] (4) A back adhesive layer 14 is provided on the back of the substrate 13 ABS, and the organic solvent in the adhesive layer 12 is removed by heat drying; the adhesive layer 12 after drying has a thickness of 15 μm.

[0091] (5) The finished product obtained above is ripened, rolled up and slit in sequence to obtain the prepared automotive exterior TOM film A.

[0092] Comparative Example 1:

[0093] (1) Print ink on the surface protection layer 10 PMMA by gravure printing as the decorative layer 11; wherein the PMMA thickness is 75 μm.

[0094] (2) An adhesive layer 12 is provided on the decorative layer 11 by using a micro-concave coating method or the like, and the organic solvent in the adhesive layer 12 is removed by heat drying; the adhesive layer 12 after drying has a thickness of 8 μm.

[0095] (3) The base material 13 ABS and the adhesive layer 12 are laminated by a hot laminating roller; wherein the thickness of the ABS is 400 μm.

[0096] (4) A back adhesive layer 14 is provided on the back of the substrate 13 ABS, and the organic solvent in the adhesive layer 12 is removed by heat drying; the adhesive layer 12 after drying has a thickness of 15 μm.

[0097] (5) The finished product obtained above is ripened, rolled up and slit in sequence to obtain the prepared automotive exterior TOM film A.

[0098] Comparative Example 2:

[0099] (1) Print ink on the surface protection layer 10PC by gravure printing as the decorative layer 11; wherein the thickness of PC is 125 μm.

[0100] (2) An adhesive layer 12 is provided on the decorative layer 11 by using a micro-concave coating method or the like, and the organic solvent in the adhesive layer 12 is removed by heat drying; the adhesive layer 12 after drying has a thickness of 8 μm.

[0101] (3) The base material 13PC and the adhesive layer 12 are laminated by a hot laminating roller; wherein the thickness of PC is 400 μm.

[0102] (4) A back adhesive layer 14 is provided on the back of the substrate 13 ABS, and the organic solvent in the adhesive layer 12 is removed by heat drying; the adhesive layer 12 after drying has a thickness of 15 μm.

[0103] (5) The finished product obtained above is ripened, rolled up and slit in sequence to obtain the prepared automotive exterior TOM film A.

[0104] Comparative Example 3:

[0105] (1) Print ink on the surface protection layer 10PVC by gravure printing as the decorative layer 11; wherein the thickness of the PVC film is 100 μm.

[0106] (2) An adhesive layer 12 is provided on the decorative layer 11 by using a micro-concave coating method or the like, and the organic solvent in the adhesive layer 12 is removed by heat drying; the adhesive layer 12 after drying has a thickness of 8 μm.

[0107] (3) The base material 13 ABS and the adhesive layer 12 are laminated by a hot laminating roller; wherein the thickness of the ABS is 400 μm.

[0108] (4) A back adhesive layer 14 is provided on the back of the substrate 13 ABS, and the organic solvent in the adhesive layer 12 is removed by heat drying; the adhesive layer 12 after drying has a thickness of 15 μm.

[0109] (5) The finished product obtained above is ripened, rolled up and slit in sequence to obtain the prepared automotive exterior TOM film A.

[0110] Comparative Example 4:

[0111] (1) Printing ink on the surface protection layer 10 PVDF / PMMA co-extruded film by gravure printing as the decorative layer 11; wherein the thickness of the PVDF / PMMA co-extruded film is 20 μm.

[0112] (2) An adhesive layer 12 is provided on the decorative layer 11 by using a micro-concave coating method or the like, and the organic solvent in the adhesive layer 12 is removed by heat drying; the adhesive layer 12 after drying has a thickness of 8 μm.

[0113] (3) The base material 13 ABS and the adhesive layer 12 are laminated by a hot laminating roller; wherein the thickness of the ABS is 400 μm.

[0114] (4) A back adhesive layer 14 is provided on the back of the substrate 13 ABS, and the organic solvent in the adhesive layer 12 is removed by heat drying; the adhesive layer 12 after drying has a thickness of 5 μm.

[0115] (5) The finished product obtained above is ripened, rolled up and slit in sequence to obtain the prepared automotive exterior TOM film A.

[0116] Comparative Example 5:

[0117] (1) Printing ink on the surface protection layer 10 PVDF / PMMA co-extruded film by gravure printing as the decorative layer 11; wherein the thickness of the PVDF / PMMA co-extruded film is 20 μm.

[0118] (2) An adhesive layer 12 is provided on the decorative layer 11 by using a micro-concave coating method or the like, and the organic solvent in the adhesive layer 12 is removed by heat drying; the adhesive layer 12 after drying has a thickness of 5 μm.

[0119] (3) The base material 13 ABS and the adhesive layer 12 are laminated by a hot laminating roller; wherein the thickness of the ABS is 400 μm.

[0120] (4) A back adhesive layer 14 is provided on the back of the substrate 13 ABS, and the organic solvent in the adhesive layer 12 is removed by heat drying; the adhesive layer 12 after drying has a thickness of 15 μm.

[0121] (5) The finished product obtained above is ripened, rolled up and slit in sequence to obtain the prepared automotive exterior TOM film A.

[0122] Comparative Example 6:

[0123] (1) Printing ink on the surface protection layer 10 PVDF / PMMA co-extruded film by gravure printing as the decorative layer 11; wherein the thickness of the PVDF / PMMA co-extruded film is 20 μm.

[0124] (2) An adhesive layer 12 is provided on the decorative layer 11 by using a micro-concave coating method or the like, and the organic solvent in the adhesive layer 12 is removed by heat drying; the adhesive layer 12 after drying has a thickness of 8 μm.

[0125] (3) The base material 13 ABS and the adhesive layer 12 are laminated by a hot laminating roller; wherein the thickness of the ABS is 400 μm.

[0126] (4) A back adhesive layer 14 is provided on the back of the substrate 13 ABS, and the organic solvent in the adhesive layer 12 is removed by heat drying; the adhesive layer 12 after drying has a thickness of 15 μm.

[0127] (5) The finished product obtained above is ripened, rolled up and slit in sequence to obtain the prepared automotive exterior TOM film A.

[0128] project Adhesion Salt spray test Chemical resistance UV aging High pressure washing Stone impact test Formability Example 1 PASS PASS PASS PASS PASS PASS good Example 2 PASS PASS PASS PASS PASS PASS good Example 3 PASS PASS PASS PASS PASS PASS good Example 4 PASS PASS PASS PASS PASS PASS good Example 5 PASS PASS PASS PASS PASS PASS good Comparative Example 1 PASS NG NG PASS PASS NG good Comparative Example 2 PASS NG NG NG PASS NG good Comparative Example 3 PASS NG NG NG PASS PASS good Comparative Example 4 NG PASS PASS PASS NG NG good Comparative Example 5 NG PASS PASS PASS NG NG good Comparative Example 6 PASS PASS PASS PASS PASS NG good

[0129] Table 1—TOM membrane performance test results of examples and comparative examples

[0130] It can be seen from the performance test results of the TOM film in Examples 1 to 5 that the TOM film used in the automobile exterior TOM film A not only meets the decorative requirements of the automobile exterior, but also, because the surface protection layer 10 uses a PVDF / PMMA co-extruded film material with better comprehensive performance, the TOM film can withstand the harsh automobile exterior use environment and can pass salt spray tests, chemical medium resistance tests, UV aging tests, high-pressure cleaning tests, stone impact tests and other automobile exterior tests.

[0131] It can be seen from Comparative Examples 1 to 3 that no matter whether the surface protection layer 10 is PMMA, PC or PVC, it cannot pass the salt spray test, chemical medium resistance test, and UV aging test; it can be seen from Comparative Examples 4 and 5 that when the adhesive and the backing layer 14 are too thin, it has a great impact on the adhesion, high-pressure washing and stone impact test; it can be seen from Comparative Example 6 that when the thickness of the surface protection layer 10 PVDF / PMMA co-extruded film is too thin, it cannot pass the stone impact test.

[0132] In addition, in order to further study the specific corrosion resistance effect of the automobile exterior TOM film A in the salt spray test, as well as the limit of its corrosion resistance, the present application also proposes a salt spray test device for the automobile exterior TOM film.

[0133] See also Figure 1 and Figure 2 As shown, the salt spray test device for the TOM film of the automobile exterior comprises a stationary salt spray reactor 2, on which a cover 20 for self-sealing is hinged.

[0134] The salt spray reactor 2 and the cover 20 can be combined into an open and closed whole, and the cover 20 can control the opening and closing thereof.

[0135] A salt spray plate 4 for testing the surface protection layer 10 and the adhesive layer 14 of the automobile exterior TOM film A is provided in the salt spray reactor 2, and a fogging member 5 for spraying salt spray on the automobile exterior TOM film A clamped on the salt spray plate 4 is also provided at the bottom of the salt spray reactor 2.

[0136] The main function of the salt spray plate 4 is to clamp and fix the automobile exterior TOM film A to be subjected to the salt spray test.

[0137] The function of the fogging element 5 is to release the salt fog into the salt fog reactor 2 and also to control the concentration of the salt fog.

[0138] When it is necessary to perform a salt spray test on the automobile exterior TOM film A, first open the cover 20 on the salt spray reactor 2, and then drive the salt spray plate 4 inside the salt spray reactor 2 to lift through the linkage lifting component 3, the purpose of which is to facilitate the installation of the automobile exterior TOM film A on the salt spray plate 4, as shown below.

[0139] See also Figure 2 and Figure 3 As shown, a linkage lifting component 3 is further provided between the salt spray reactor 2 and the salt spray plate 4. The linkage lifting component 3 includes a lifting bracket 30 of a rectangular structure. The lifting bracket 30 is slidably distributed along the height direction of the salt spray reactor 2, and the salt spray plate 4 is hinged to the middle part of the lifting bracket 30.

[0140] It should be noted that, in the initial state, that is, when the cover 20 is closed, the lifting bracket 30 is located inside the salt spray reactor 2 and its height is lower than the height of the salt spray reactor 2 .

[0141] A lifting rack 31 is integrated on one side of the lifting bracket 30, and a first gear 32 is meshed on the lifting rack 31. The first gear 32 rotates on the inner wall of the salt spray reactor 2. The first gear 32 is connected to a second gear 33 that is rotatably arranged on the outer wall of the salt spray reactor 2 through a synchronous shaft. The second gear 33 is meshed with a linkage gear arc plate 34, and one side of the linkage gear arc plate 34 is installed on the side wall of the cover 20.

[0142] The second gear 33 is coaxially arranged with the first gear 32 , and the two rotate synchronously and have the same size.

[0143] During the specific implementation, the cover 20 is lifted upward to rotate around the hinge point, and the cover 20 drives the linkage arc plate 34 to move along a circular trajectory. At this time, the linkage arc plate 34 controls the No. 2 gear 33 on the outer wall of the salt spray reactor 2 to rotate counterclockwise, and the No. 2 gear 33 controls the No. 1 gear 32 to rotate synchronously. Then the No. 1 gear 32 drives the meshing lifting rack 31 thereon and the lifting bracket 30 integrally connected with the lifting rack 31 to move upward synchronously. After the cover 20 on the salt spray reactor 2 rotates to the specified position, the lifting bracket 30 and the salt spray plate 4 arranged on the upper end thereof extend upward from the salt spray reactor 2.

[0144] After the automobile exterior TOM film A is connected to the salt spray plate 4, the cover 20 is closed, and the first gear 32 rotates clockwise, thereby controlling the lifting bracket 30 to move toward the inside of the salt spray reactor 2 until it reaches the test area of ​​the salt spray test.

[0145] The linkage lifting component 3 can not only facilitate the installation and clamping of the automobile exterior TOM film A on the salt spray plate 4, but also control the angles of the salt spray plate 4 and the automobile exterior TOM film A.

[0146] Replay Figure 2 and Figure 3 As shown, when the cover 20 is opened, the linkage gear arc plate 34 will move along a circular trajectory. In order to ensure the stability of its movement and the distance of its movement, the present application also proposes a limiting arc block 36. The limiting arc block 36 can make the movement of the linkage gear arc plate 34 more stable, avoid the linkage gear arc plate 34 from shaking when moving, and can also limit the upper limit position of the lifting bracket 30 to avoid the lifting bracket 30 falling off from the salt spray reactor 2.

[0147] An arc groove 35 is provided in the middle of the linkage tooth arc plate 34 , and a limiting arc block 36 is provided at one end of the salt spray reactor 2 close to the linkage tooth arc plate 34 . The linkage tooth arc plate 34 slides on the limiting arc block 36 on the outer wall of the salt spray reactor 2 through the arc groove 35 .

[0148] An arc groove 35 is provided on the linkage tooth arc plate 34, so that the linkage tooth arc plate 34 can be hollowed out, which can reduce the weight of the linkage tooth arc plate 34, facilitate the opening and closing of the cover 20, and limit the linkage tooth arc plate 34; further, a hydraulic rod is hinged between the cover 20 and the salt spray reactor 2. It should be noted that it is not drawn in the figure, and its purpose is to play a role of assisting when opening and closing the cover 20, thereby reducing the force of manually opening and closing the cover 20.

[0149] See also Figure 4 and Figure 5 The figure shows a schematic diagram of the structure of the TOM film A installed on the exterior of the automobile in the present application.

[0150] The salt spray plate 4 is also provided with a working area 40 for facilitating the installation of the automobile exterior TOM film A and salt spray testing. The salt spray plate 4 is also symmetrically provided with strip slide grooves 41 in the height direction. A plurality of clamping plates 42 for clamping the automobile exterior TOM film A are slidably installed in the strip slide grooves 41. Fixed clamping magnets 43 are installed at equal intervals on the clamping plates 42. Active active magnets 44 are also installed correspondingly on the clamping magnets 43 of the clamping plates 42.

[0151] It should be noted that the clamping plate 42 is slidably disposed in the strip-shaped slide groove 41 of the salt spray plate 4 , and its sliding has a certain damping due to the friction force, thereby ensuring the stability of the clamping plate 42 .

[0152] During the specific implementation, first refer to the size of the automobile exterior TOM film A that needs to be subjected to the salt spray test, adjust the spacing between the clamping plates 42 on the salt spray plate 4 so that the spacing is smaller than the size of the automobile exterior TOM film A, and then place the automobile exterior TOM film A on the clamping plate 42, and then place the active magnet 44 on the clamping magnet 43 on the clamping plate 42, and clamp the automobile exterior TOM film A by the magnetic force of the mutual attraction between the clamping magnet 43 and the active magnet 44. It not only has a fast clamping speed, but also is easy to operate, and can effectively improve the clamping rate of the automobile exterior TOM film A and the stability of the clamping of the automobile exterior TOM film A.

[0153] Furthermore, the present application can perform clamping operations on automobile exterior TOM films A of different sizes.

[0154] In the above, the automobile exterior TOM film A is mainly connected to the salt spray plate 4. However, after the automobile exterior TOM film A is tested for a long time, a large amount of debris will remain in the salt spray reactor 2, so it needs to be inspected and cleaned regularly. However, when the salt spray plate 4 is placed horizontally inside the salt spray reactor 2, it will seriously affect the cleaning of the salt spray reactor 2. Therefore, the present application proposes a quick-release part 6.

[0155] See also Figure 5 , Figure 6 and Figure 7 As shown, the quick-release portion 6 includes movable grooves 60 symmetrically opened on both sides of the length direction of the salt spray plate 4, a telescopic clamping column 61 is slidably provided in the movable groove 60 of the salt spray plate 4, a clamping compression spring 62 placed in the movable groove 60 is provided between the clamping column 61 and the salt spray plate 4, a pressing handle 63 is provided at one end of the clamping column 61 close to the clamping compression spring 62, the pressing handle 63 is slidably arranged on the salt spray plate 4, and a pressing groove for the pressing handle 63 to slide is provided on the salt spray plate 4.

[0156] The lifting bracket 30 on the salt spray reactor 2 is provided with a circular clamping hole 64 for the clamping column 61 to be clamped.

[0157] In the initial state, the two sides of the salt spray plate 4 in the length direction are provided with clamping columns 61 , and the clamping columns 61 can be inserted into the clamping circular holes 64 inside the salt spray reactor 2 .

[0158] It should be noted that the bottom of the clamping post 61 is provided with an inclined structure.

[0159] In specific implementation, when the salt spray plate 4 needs to be removed, the operator presses the pressing handle 63 on the salt spray plate 4 to make the two pressing handles 63 approach each other. At this time, the pressing handle 63 controls the connected clamping column 61 to move synchronously, so that the clamping column 61 retracts into the movable groove 60 opened on the salt spray plate 4, so that the two sides of the salt spray plate 4 in the length direction are in a flush position, and then the salt spray plate 4 is held and removed.

[0160] After the interior of the salt spray reactor 2 is cleaned, the salt spray plate 4 is re-gripped and pressed against the clamping circular hole 64 on the lifting bracket 30, and pressed downward to ensure that the clamping column 61 is passively retracted into the movable groove 60 on the salt spray plate 4 until the clamping column 61 of the salt spray plate 4 is aligned with the clamping circular hole 64 of the lifting bracket 30, and then the clamping column 61 is inserted into the clamping circular hole 64 on the lifting bracket 30 under the action of the clamping compression spring 62, and the rapid installation of the salt spray plate 4 is completed.

[0161] Similarly, after the salt spray plate 4 is mounted on the lifting bracket 30, its angle can also be adjusted, as shown below.

[0162] See also Figure 5 , Figure 6 and Figure 7 As shown, it is a structural schematic diagram of the present application for adjusting the angle of the salt spray plate 4; an angle adjustment component 7 for adjusting the angle of the salt spray plate 4 is also provided between the salt spray reactor 2 and the clamping column 61 on the salt spray plate 4, and the angle adjustment component 7 includes an angle adjustment cylinder 70 rotatably arranged in the clamping circular hole 64 of the lifting bracket 30, and the inner side of the angle adjustment cylinder 70 is a serrated structure, and the clamping column 61 is provided with an assembly gear 71 meshing with the angle adjustment cylinder 70, and an angle adjustment worm wheel 72 is installed at one end of the angle adjustment cylinder 70 away from the clamping column 61, and an angle adjustment worm 73 is meshed on the angle adjustment worm wheel 72, and the angle adjustment worm 73 is arranged on the lifting bracket 30.

[0163] In the initial state, the salt spray plate 4 is in a horizontal state.

[0164] After the clamping column 61 on the salt spray plate 4 is inserted into the clamping circular hole 64 on the lifting bracket 30, the assembly gear 71 on the clamping column 61 is meshed with the angle adjustment cylinder 70 on the lifting bracket 30; when the angle of the salt spray plate 4 needs to be adjusted, the operator rotates the angle adjustment worm 73, and the angle adjustment worm 73 drives the angle adjustment worm wheel 72 to rotate, and the worm wheel controls the angle adjustment cylinder 70 to rotate, and the angle adjustment cylinder 70 further controls the salt spray plate 4 to adjust the angle through the assembly gear 71 and the clamping column 61.

[0165] It should be noted that the angle-adjusting worm 73 and the angle-adjusting worm wheel 72 are unidirectionally driven, and the angle-adjusting worm wheel 72 can be controlled only by rotating the angle-adjusting worm 73 , thereby preventing the salt spray plate 4 from self-rotating.

[0166] After the automobile exterior TOM film A is clamped and the angle is adjusted, the operator can perform a salt spray test on the automobile exterior TOM film A, specifically.

[0167] See also Fig. 9 As shown, the fog-making member 5 includes a storage box 50 for storing salt solution, the storage box 50 is arranged on the outer side wall of the salt spray reactor 2, and the storage box 50 is connected to a spray head 51 for spraying salt mist into the salt spray reactor 2 through a pipe extending outward, and the spray head 51 is arranged inside a closed cylinder 52, and the closed cylinder 52 is rotatably arranged at the bottom of the inner side of the salt spray reactor 2.

[0168] A driving motor 53 is connected to the bottom of the closing cylinder 52, and the driving motor 53 is installed on the outer wall of the salt spray reactor 2 through a motor seat. A first gear 55 is connected to the output end of the driving motor 53, and a second gear 54 is meshed on the first gear 55, and the second gear 54 is connected to the closing cylinder.

[0169] It should be noted that the storage box 50 is a conventionally known structure and is used to store saline solution, which is composed of physiological saline.

[0170] When the automobile exterior TOM film A is clamped and the cover 20 of the salt spray reactor 2 is closed, the existing known water pump inside the storage box 50 starts to extract the salt solution and transports the salt solution to the spray head 51 for spraying the salt spray through a pipeline. Then the spray head 51 evenly sprays a large amount of salt spray to diffuse in the entire closed salt spray reactor 2, ensuring that the salt spray reactor 2 is in a certain liquid concentration; however, it should be noted that a number of known sensors for detecting the internal humidity, temperature and salt spray concentration of the salt spray reactor 2 are arranged inside to ensure that the salt spray reactor 2 is always kept in a reasonable environment.

[0171] See also Figure 8As shown, further, in order to ensure that two sets of telescopic adjustment plates 45 with adjustable distances are provided at both ends of the salt spray plate 4 in the height direction, the telescopic adjustment plates 45 are arranged on the salt spray reactor 2 at equal intervals.

[0172] However, it should be noted that after placing the automobile exterior TOM film A on the salt spray plate 4, both sides of the automobile exterior TOM film A are exposed to the salt spray reactor 2 with salt spray, and the surface protection layer 10 of the automobile exterior TOM film A is exposed to the salt spray environment. Then, after being exposed to the salt spray environment for 24 hours, the condition of the surface protection layer 10 of the automobile exterior TOM film A is observed; if a large amount of corrosion appears on the surface protection layer 10 of the automobile exterior TOM film A, it means that the corrosion resistance of the surface protection layer 10 of the automobile exterior TOM film A is poor.

[0173] However, when the surface protection layer 10 of the automobile exterior TOM film A is exposed to the salt spray environment, the adhesive layer 14 of the automobile exterior TOM film A is also exposed to the salt spray environment. When the adhesive layer 14 of the automobile exterior TOM film A is corroded, the base material 13, the adhesive layer 12 and the decorative layer 11 will be corroded. If the entire automobile exterior TOM film A is perforated due to corrosion, it cannot be determined that the surface protection layer 10 of the automobile exterior TOM film A is of unqualified quality and cannot play a certain anti-corrosion role.

[0174] Therefore, exposing the surface protection layer 10 and the adhesive layer 14 of the automobile exterior TOM film A to a salt spray environment will affect the accuracy of the salt spray test results of the automobile exterior TOM film A, and may easily lead to accidental test results.

[0175] Furthermore, the present application proposes a telescopic adjustment plate 45. When it is necessary to perform a salt spray test on the surface protection layer 10 of the automobile exterior TOM film A, the telescopic adjustment plate 45 corresponding to the adhesive layer 14 of the automobile exterior TOM film A is stretched to cover one end of the adhesive layer 14 of the automobile exterior TOM film A to prevent it from contacting the salt spray in the salt spray reactor 2. In this way, the surface protection layer 10 of the automobile exterior TOM film A can be exposed to the salt spray for corrosion resistance testing.

[0176] Then, when it is necessary to perform a salt spray test on the adhesive layer 14 of the automobile exterior TOM film A, the surface protection layer 10 of the automobile exterior TOM film A is covered, and only the adhesive layer 14 of the automobile exterior TOM film A is exposed to the salt spray environment for corrosion resistance test to detect whether the adhesive layer 14 of the automobile exterior TOM film A and the substrate 13 have a certain corrosion resistance.

[0177] Similarly, the present application proposes an angle adjustment component 7, which can control the angle of the automobile exterior TOM film A when the surface protection layer 10 of the automobile exterior TOM film A is exposed to salt spray, and perform a salt spray test on it in a horizontal state; then, when it is tilted at different angles, perform corresponding multiple salt spray tests, and then control the automobile exterior TOM film A to be in a vertical state and perform a salt spray test on it. In this way, the corrosion resistance of the surface protection layer 10 of the automobile exterior TOM film A can be detected by detecting different angles, which can greatly improve the accuracy of the salt spray test of the automobile exterior TOM film A, avoid the randomness of the detection through multiple test data, and improve the reliability of the detection results.

[0178] Embodiment 2: Based on Embodiment 1, in order to further ensure the accuracy of the detection results of the automobile exterior TOM film A, the present application proposes a structure for adjusting the amount of salt spray sprayed by the spray head 51, as shown below.

[0179] See also Fig. 9 , Fig.10 and Fig.11 As shown, a vertically distributed lifting column 520 is also slidably arranged inside the closing cylinder 52, and a covering plate 521 for covering the spray head 51 is installed on the upper end of the lifting column 520, and a plurality of annular closed rubber caps corresponding to the spray head 51 are arranged on the covering plate 521, and a reset tension spring 523 is arranged between the lifting column 520 and the closing cylinder 52.

[0180] In the initial state, the annular sealing rubber cap covers the multiple spray heads 51 inside the closing cylinder 52 to prevent them from spraying salt mist. When the driving motor 53 is started, the driving motor 53 drives the closing cylinder 52 to rotate, and the concave-convex linkage groove 525 on the closing cylinder 52 rotates synchronously. At this time, the linkage rod 527 abutting against the concave-convex linkage groove 525 will reciprocate up and down along the inner wall of the closing cylinder 52 with the concave-convex linkage groove 525. When the linkage rod 527 moves upward, the linkage rod 527 controls the covering plate 521 to rotate. And the annular sealing rubber cap moves upward, at this time, the spray head 51 continuously and uniformly sprays salt mist outward to ensure that the salt mist enters the salt spray reactor 2, when the linkage rod 527 controls the cover plate 521 to move downward, the cover plate 521 and the annular sealing rubber cap will always be against the spray head 51, so that the spray head 51 is closed and cannot spray salt mist outward, and the intermittent spraying of salt mist outward by the spray head 51 can ensure the salt mist concentration in the salt spray reactor 2, avoiding continuous spraying of salt mist outward and causing a large amount of salt mist waste.

[0181] Read carefully Fig.13 As shown, a plurality of linkage rings 524 are installed at equal intervals from the inside to the outside on the outer wall of the closing tube 52, and a plurality of linkage rings 524 are provided with concave-convex linkage grooves 525, and the sizes of the concave-convex linkage grooves 525 of the plurality of linkage rings 524 gradually decrease from the inside to the outside.

[0182] See also Fig.12 and Fig.13 As shown, a linkage block 526 is slidably provided on the cover plate 521 , a linkage rod 527 is installed at the bottom of the linkage block 526 , and the linkage rod 527 movably rests on a plurality of linkage rings 524 .

[0183] A mist adjustment rod 528 is also rotatably provided on the inner wall of the salt spray reactor 2. One side of the mist adjustment rod 528 is rotatably provided through a bearing to penetrate the inner wall of the salt spray reactor 2 and extend outward. A mist adjustment block 529 is screwed on the mist adjustment rod 528. The mist adjustment block 529 is a telescopic structure. The bottom of the mist adjustment block 529 is connected to the linkage block 526.

[0184] It should be noted that a plurality of linkage rings 524 are provided on the outer side of the closing cylinder 52. Fig.13 As shown, for the convenience of description, they are numbered here, that is, the first linkage ring 524, the second linkage ring 524 and so on.

[0185] Furthermore, the trough distance of the concave-convex linkage groove 525 of the first linkage ring 524 is long, and the crest distance is short.

[0186] The crest distance of the concave-convex linkage groove 525 of the second linkage ring 524 is longer than that of the first linkage ring 524 , while the trough distance is shorter than that of the first linkage ring 524 .

[0187] The distance between the crests of the concave-convex linkage groove 525 of the third linkage ring 524 is longer than that of the second linkage ring 524 , while the distance between the troughs is shorter than that of the second linkage ring 524 .

[0188] In order to increase the concentration inside the salt spray reactor 2, the present application also proposes a mist volume adjustment rod 528. The operator rotates the infinite adjustment rod to make the adjustment block control the linkage block 526 and the linkage rod 527 to move.

[0189] When the linkage rod 527 moves to the first linkage ring 524 close to the closing tube 52, the peak length of the concave-convex linkage groove 525 on the first linkage ring 524 is shorter, so the cover plate 521 is lifted up for a short time, and the amount of salt mist sprayed by the spray head 51 inside the closing tube 52 will be correspondingly reduced. At this time, the concentration of salt mist inside the salt spray reactor 2 is lower.

[0190] When it is necessary to increase the salt mist concentration inside, the linkage rod 527 can be controlled to lean against the concave-convex linkage groove 525 on the second linkage ring 524. The peak length of the concave-convex linkage groove 525 on the second linkage ring 524 is longer than that of the concave-convex linkage groove 525 on the first linkage ring 524. Therefore, at this time, the cover plate 521 is lifted for a longer time, and the cover plate 521 leans against the spray head 51 for a shorter time, so that more salt mist can be sprayed into the salt spray reactor 2, thereby increasing the internal salt mist concentration.

[0191] When it is necessary to further increase the salt mist concentration inside the reactor 2, the linkage rod 527 can be controlled to abut against the concave-convex linkage groove 525 on the third linkage ring 524. At this time, the lifting time of the cover plate 521 is further increased, and the time abutting against the spray head 51 is further shortened, so that the salt mist sprayed into the salt spray reactor 2 can be further increased, thereby increasing the salt mist concentration in the salt spray reactor 2.

[0192] After the automobile exterior TOM film A has completed the salt spray test, it is taken out from the salt spray reactor 2, and the inside thereof is cleaned, and the test results are recorded.

[0193] During operation: First, when it is necessary to perform a salt spray test on the automobile exterior TOM film A, first open the cover 20 on the salt spray reactor 2, and the lifting bracket 30 and the salt spray plate 4 arranged on its upper end extend upward from the salt spray reactor 2.

[0194] Step 2: Then, referring to the size of the automobile exterior TOM film A that needs to be subjected to the salt spray test, adjust the spacing between the clamping plates 42 on the salt spray plate 4 so that the spacing is smaller than the size of the automobile exterior TOM film A, and then place the automobile exterior TOM film A on the clamping plate 42, and then place the active magnet 44 on the clamping magnet 43 on the clamping plate 42, and clamp the automobile exterior TOM film A by the magnetic force of the mutual attraction between the clamping magnet 43 and the active magnet 44.

[0195] Step 3: When the salt spray plate 4 needs to be removed, the operator presses the pressing handle 63 on the salt spray plate 4 to make the two pressing handles 63 approach each other. At this time, the pressing handle 63 controls the connected clamping column 61 to move synchronously, so that the clamping column 61 retracts into the movable groove 60 provided on the salt spray plate 4, so that the two sides of the salt spray plate 4 in the length direction are in a flush position, and then the salt spray plate 4 is held and removed.

[0196] Step 4: After the clamping column 61 on the salt spray plate 4 is inserted into the clamping circular hole 64 on the lifting bracket 30, the angle adjustment worm 73 is rotated, and the angle adjustment worm 73 drives the angle adjustment worm wheel 72 to rotate, and the worm wheel controls the angle adjustment cylinder 70 to rotate. Further, the angle adjustment cylinder 70 controls the salt spray plate 4 to adjust the angle by assembling the gear 71 and the clamping column 61.

[0197] Step 5: After the automobile exterior TOM film A is clamped and the angle is adjusted, the cover 20 of the salt spray reactor 2 is closed, and the existing known water pump inside the storage box 50 starts to extract salt solution, and transports the salt solution to the spray head 51 for spraying salt spray through a pipeline. Then the spray head 51 evenly sprays a large amount of salt spray, so that it diffuses in the entire closed salt spray reactor 2, and the automobile exterior TOM film A inside it is subjected to a salt spray test.

[0198] Step 6: When it is necessary to perform a salt spray test on the surface protection layer 10 of the automobile exterior TOM film A, stretch the telescopic adjustment plate 45 corresponding to the adhesive layer 14 of the automobile exterior TOM film A to cover one end of the adhesive layer 14 of the automobile exterior TOM film A to prevent it from contacting the salt spray in the salt spray reactor 2, so as to ensure that the surface protection layer 10 of the automobile exterior TOM film A is exposed to the salt spray for corrosion resistance testing.

[0199] Step 7: When it is necessary to perform a salt spray test on the adhesive layer 14 of the automobile exterior TOM film A, the surface protection layer 10 of the automobile exterior TOM film A is covered, and only the adhesive layer 14 of the automobile exterior TOM film A is exposed to the salt spray environment for corrosion resistance test to detect whether the adhesive layer 14 of the automobile exterior TOM film A and the substrate 13 have a certain corrosion resistance.

[0200] Step 8: When it is necessary to adjust the salt spray concentration inside the salt spray reactor 2, the position of the linkage rod 527 is controlled to change the amount of salt spray sprayed outward by the spray head 51, so as to adjust the salt spray concentration. Finally, when the automobile exterior TOM film A completes the salt spray test, it can be taken out of the salt spray reactor 2, and the inside thereof is cleaned, and the test results are recorded.

[0201] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A TOM film for automobile exterior, characterized in that: It comprises a surface protection layer (10), a decorative layer (11), an adhesive layer (12), a base material (13) and a back adhesive layer (14) which are arranged in sequence from top to bottom.

2. A salt spray test device for automobile exterior TOM film, using the automobile exterior TOM film according to claim 1, characterized in that: The automobile exterior TOM film salt spray test device comprises a stationary salt spray reactor (2), and a self-sealing cover (20) is hingedly connected to the salt spray reactor (2); The salt spray reactor (2) is provided with a salt spray plate (4) for testing the surface protection layer (10) and the adhesive layer (14) of the automobile exterior TOM film respectively, and the bottom of the salt spray reactor (2) is also provided with a fogging member (5) for spraying salt spray on the automobile exterior TOM film clamped on the salt spray plate (4).

3. A salt spray test device for TOM film of automobile exterior according to claim 2, characterized in that: A linkage lifting component (3) is further provided between the salt spray reactor (2) and the salt spray plate (4), wherein the linkage lifting component (3) comprises a lifting bracket (30) of a rectangular structure, wherein the lifting bracket (30) is slidably distributed along the height direction of the salt spray reactor (2), and the salt spray plate (4) is hinged to the middle part of the lifting bracket (30); A lifting rack (31) is integrally provided on one side of the lifting bracket (30), a first gear (32) is meshed on the lifting rack (31), the first gear (32) rotates on the inner wall of the salt spray reactor (2), the first gear (32) is connected to a second gear (33) rotatably arranged on the outer wall of the salt spray reactor (2) via a synchronous shaft, the second gear (33) is meshed with a linkage gear arc plate (34), and one side of the linkage gear arc plate (34) is mounted on the side wall of the cover (20).

4. A salt spray test device for TOM film of automobile exterior according to claim 3, characterized in that: An arc groove (35) is provided in the middle of the linkage tooth arc plate (34); a limiting arc block (36) is provided at one end of the salt spray reactor (2) close to the linkage tooth arc plate (34); and the linkage tooth arc plate (34) is slidably arranged on the limiting arc block (36) on the outer wall of the salt spray reactor (2) through the arc groove (35).

5. The salt spray test device for TOM film of automobile exterior according to claim 3, characterized in that: The salt spray plate (4) is also provided with a working area (40) for facilitating the installation of a TOM film for automobile exterior decoration and salt spray testing. The salt spray plate (4) is also symmetrically provided with strip-shaped slide grooves (41) in the height direction. A plurality of clamping plates (42) for clamping the TOM film for automobile exterior decoration are slidably installed in the strip-shaped slide grooves (41). Fixed clamping magnets (43) are installed at equal intervals on the clamping plates (42). Active active magnets (44) are also correspondingly installed on the clamping magnets (43) of the clamping plates (42).

6. The salt spray test device for TOM film of automobile exterior according to claim 5, characterized in that: The salt spray plate (4) is also provided with a quick-release portion (6), the quick-release portion (6) comprising movable grooves (60) symmetrically arranged on both sides of the length direction of the salt spray plate (4), a telescopic clamping column (61) is slidably arranged in the movable groove (60) of the salt spray plate (4), a clamping compression spring (62) placed in the movable groove (60) is arranged between the clamping column (61) and the salt spray plate (4), a pressing handle (63) is arranged at one end of the clamping column (61) close to the clamping compression spring (62), the pressing handle (63) is slidably arranged on the salt spray plate (4), and a pressing groove for the pressing handle (63) to slide is arranged on the salt spray plate (4).

7. The salt spray test device for TOM film of automobile exterior according to claim 6, characterized in that: The lifting bracket (30) is provided with a clamping circular hole (64); and the bottom of the clamping column (61) is provided with an inclined structure.

8. The salt spray test device for TOM film of automobile exterior according to claim 7, characterized in that: An angle adjustment component (7) for adjusting the angle of the salt spray plate (4) is also provided between the salt spray reactor (2) and the clamping column (61) on the salt spray plate (4). The angle adjustment component (7) comprises an angle adjustment cylinder (70) rotatably arranged in the clamping circular hole (64) of the lifting bracket (30). The inner side of the angle adjustment cylinder (70) is a sawtooth structure. The clamping column (61) is provided with an assembly gear (71) meshed with the angle adjustment cylinder (70). An angle adjustment worm wheel (72) is installed at one end of the angle adjustment cylinder (70) away from the clamping column (61). An angle adjustment worm screw (73) is meshed on the angle adjustment worm wheel (72). Both the angle adjustment worm wheel (72) and the angle adjustment worm screw (73) are provided on the lifting bracket (30).

9. The salt spray test device for TOM film of automobile exterior according to claim 2, characterized in that: Two sets of telescopic adjustment plates (45) with adjustable distances are also provided at both ends of the salt spray plate (4) in the height direction, and the telescopic adjustment plates (45) are arranged at equal intervals on the salt spray reactor (2).

10. The salt spray test device for TOM film of automobile exterior according to claim 2, characterized in that: The mist-generating element (5) comprises a storage box (50) for storing salt solution, the storage box (50) being arranged on the outer side wall of the salt spray reactor (2), the storage box (50) being connected to a spray head (51) for spraying salt mist into the salt spray reactor (2) through a pipe extending outward, the spray head (51) being arranged inside a closed cylinder (52), and the closed cylinder (52) being rotatably arranged at the bottom of the inner side of the salt spray reactor (2).

Images