Automobile exterior hot stamping film and weather resistance testing device thereof

Abstract

The invention relates to an automobile exterior hot stamping film and a weather resistance testing device thereof, and relates to the technical field of functional decorative films. The automobile exterior hot stamping film comprises a carrier layer, a high-weather-resistance coating, a bottom coating, a decorative layer and a transfer printing bonding layer, the weather resistance testing device for the automobile exterior hot stamping film comprises a portable testing box, a detection opening is formed in one side of the portable testing box, and a clamping device is arranged at the detection opening; a detection module is further arranged in the portable test box, and a cutting knife and an adhesion plate are arranged in the portable test box; the automobile exterior hot stamping film has excellent weather resistance and chemical resistance; the detection module can detect the adhesiveness of the automobile exterior hot stamping film, greatly improves the accuracy of weather resistance detection of the automobile exterior hot stamping film under the guarantee of multiple detection modes, can detect the adhesiveness of the automobile exterior hot stamping film on the surfaces of automobile shells made of different materials and painted surfaces, and improves the detection accuracy of the weather resistance of the automobile exterior hot stamping film. And the applicability of the device is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of functional decorative films, and in particular to an automobile exterior hot stamping film and a weather resistance testing device thereof. Background Art

[0002] Hot stamping film for automobile exterior is a decorative film that is hot stamped on the exterior of the car. This film is generally made of special materials and has the characteristics of high temperature resistance, waterproofness, and sun protection. Through hot stamping technology, various patterns, texts or patterns can be printed on the exterior of the car to beautify the appearance of the car and enhance the personalization and fashion sense of the car. Hot stamping film for automobile exterior is widely used in the fields of automobile decoration, advertising, etc., and has become a popular way of automobile decoration.

[0003] This places high demands on the performance and decorative effect of automotive functional decorative films. Therefore, weather resistance testing is required after the production of automotive exterior hot stamping films to ensure the performance of automotive functional decorative films.

[0004] For example, a Chinese patent with publication number CN219369515U discloses a device for testing the weather resistance of PVC film, which has a reasonable design, a simple and stable structure, and strong practicality. It can simultaneously subject multiple identical PVC films to weather resistance tests under various environmental conditions such as cold and hot, wind, rain, and light, and at the same time ensure the position stability of the PVC film during the test, thereby achieving more accurate detection of the weather resistance of the PVC film, and is suitable for promotion and use.

[0005] However, the above device still has some shortcomings in actual use:

[0006] 1. First, when the existing device detects the adhesion of the automobile exterior hot stamping film, the detection method is relatively complicated, which can easily lead to errors in the detection results; further, the existing device requires excessive manual participation in the steps of fixing the automobile exterior hot stamping film and moving the automobile exterior hot stamping film, which makes its operation more cumbersome and affects the efficiency of automobile exterior hot stamping film detection; and excessive manual participation will cause dust to enter the device, which will affect the detection results of the automobile exterior hot stamping film.

[0007] 2. Secondly, when the existing automobile exterior hot stamping film is tested, it is usually necessary to clamp the automobile exterior hot stamping film. However, the stability of the existing clamping device is poor, which can easily cause the automobile exterior hot stamping film being tested in the clamping device to shift, thereby affecting the accuracy of the detection structure.

[0008] 3. The existing adhesion test for automobile exterior hot stamping films has a relatively single detection method. It is unable to detect the adhesion of automobile exterior hot stamping films on automobile shells of different materials and automobile shells with different paint surfaces, which leads to deviations in the evaluation of the adhesion performance of automobile exterior hot stamping films.

[0009] Therefore, under the above-stated viewpoint, the existing devices still have room for improvement. Summary of the invention

[0010] In order to solve the above problems, the present invention provides an automotive exterior hot stamping film and a weather resistance testing device thereof, which adopts the following technical solutions:

[0011] In a first aspect, a hot stamping film for automobile exterior includes a carrier layer, a high weather resistance coating, a primer layer, a decorative layer, and a transfer adhesive layer.

[0012] The high weather resistance coating is composed of a high weather resistance coating liquid, and its raw materials, measured by weight percentage, include 50% to 85% of fluorocarbon resin, 0.3% to 1% of light stabilizer, 1% to 3% of ultraviolet absorber, 1% to 2% of nano zinc oxide, 0.5% to 3% of anti-hydrolysis stabilizer, 5%-20% of adhesion promoting resin and 5% to 20% of isocyanate; the total amount of the fluorocarbon resin, light stabilizer, ultraviolet absorber, anti-hydrolysis stabilizer, polyacrylate, adhesion promoting resin and isocyanate is 100%.

[0013] In a second aspect, a weather resistance testing device for automobile exterior hot stamping film is provided, which includes a portable testing box, a detection opening for placing the hot stamping film is provided on one side of the portable testing box, and a clamp for clamping the hot stamping film is provided at the detection opening of the portable testing box.

[0014] The portable test box is also provided with a detection module for performing performance testing on the high weather resistance coating. The detection module includes two electric push rods slidably arranged on the inner wall of the portable test box. The portable test box is also provided with a cutting knife and an adhesive plate.

[0015] Preferably, rotating gears are provided on both sides of the length direction of the portable test box, a rotating toothed belt is provided on the two rotating gears, and a plurality of annular test plates are sleeved on the outer side of the rotating toothed belt.

[0016] A rotating motor is arranged on one side of the rotating gear, and the rotating motor is arranged on the outer wall of the portable test box.

[0017] Preferably, a snap-in groove is provided on the annular test plate and the rotating toothed belt, a metal sheet is integrated in the snap-in groove, and a snap-in magnet for connecting the annular test plate and the rotating toothed belt is provided in the snap-in groove.

[0018] Preferably, the clamp comprises four groups of guide plates distributed in the length direction of the portable test box, and the four groups of guide plates are symmetrically distributed in pairs.

[0019] The portable test box is provided with four groups of guide columns symmetrically distributed on both sides in the length direction. The four groups of guide columns are threaded structures, and the four groups of guide columns are respectively screwed with horizontally sliding fixed plates. A telescopic plate is slidably installed on the bottom of the fixed plate, and a telescopic compression spring is connected between the telescopic plate and the fixed plate.

[0020] A linkage column extending toward the guide plate is connected to one side of the telescopic plate close to the guide plate, and a guide arc groove for the linkage column to slide is arranged on the guide plate.

[0021] A clamping plate is provided at one end of the telescopic plate away from the fixed plate.

[0022] One side of the four groups of guide posts is sleeved with a synchronous belt, and the guide posts on one side are connected to a guide motor.

[0023] Preferably, a right-angle trapezoidal linkage plate is connected to one side of the fixed plate, and the inclined surface structure of the right-angle trapezoidal linkage plate is arranged at one end away from the fixed plate.

[0024] The inner wall of the portable test box is also provided with a pressing assembly for pasting the hot stamping film for automobile exterior, and the pressing assembly includes a vertical plate, a right-angle connecting rod and a pressing roller. The vertical plate is symmetrically installed on the inner wall of the portable test box along the length direction of the portable test box, and the middle part of the right-angle connecting rod is hingedly installed on the vertical plate through a torsion spring, and one end of the two right-angle connecting rods is connected to the pressing roller, and the other ends of the two right-angle connecting rods extend downward and correspond to the right-angle trapezoidal linkage plate.

[0025] Preferably, the detection module also includes a detection threaded rod, and a detection threaded rod is provided on the inner wall of the portable test box, and a detection frame No. 1 and a detection frame No. 2 are screwed on the detection threaded rod, and a telescopic frame is provided at the bottom of the detection frame No. 1 and the detection frame No. 2, and a reset spring is provided between the two telescopic frames and the corresponding detection frame No. 1 and the detection frame No. 2, the cutting knife is arranged in the telescopic frame of the detection frame No. 1, and the adhesive plate is arranged in the telescopic frame of the detection frame No. 2.

[0026] Preferably, a detection motor is connected to the outer wall of the portable test box, and an output end of the detection motor is connected to the detection threaded rod.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. The present invention provides a hot stamping film for automobile exterior, which has excellent weather resistance and chemical resistance, can solve the problem of poor weather resistance of existing hot stamping films for automobile exterior, and can cope with the harsh use environment of automobile exterior, so as to achieve the goal of long-term stable outdoor use.

[0029] 2. The detection module of the present invention can detect the adhesion of the weather resistance of the automobile exterior hot stamping film, and under the guarantee of multiple detection methods, it greatly improves the accuracy of the weather resistance detection of the automobile exterior hot stamping film, and can also detect the adhesion performance of the automobile exterior hot stamping film on the surface of the automobile shell made of different materials, greatly improving the applicability of the device.

[0030] 3. The present invention can realize automatic detection of automobile exterior hot stamping film when testing the weather resistance of automobile exterior hot stamping film, reduce manual participation in the detection process, avoid external dust from entering the interior of the device, and reduce the influence of external factors on the weather resistance detection of automobile exterior hot stamping film.

[0031] Fourth, when the present invention performs adhesion testing on automobile exterior hot stamping films, it can perform adhesion testing on different types of paint surfaces of various automobiles, thereby ensuring diversity and high efficiency in testing automobile exterior hot stamping films. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0033] Figure 1 It is a schematic diagram of the main structure of the weather resistance testing device for hot stamping film for automobile exterior decoration of the present invention.

[0034] Figure 2 It is a schematic structural diagram of the automotive exterior hot stamping film of the present invention.

[0035] Figure 3 It is a partial cross-sectional view of a weather resistance testing device for hot stamping films for automobile exteriors of the present invention.

[0036] Figure 4 It is a schematic structural diagram of the clamp of the present invention from a first viewing angle.

[0037] Figure 5 It is a schematic structural diagram of the clamp of the present invention from a second viewing angle.

[0038] Figure 6 It is a schematic structural diagram of the clamp of the present invention from a third viewing angle.

[0039] Figure 7 It is a schematic diagram of the structure among the rotating gear, the rotating toothed belt, the clamping groove, the clamping magnet and the annular test plate of the present invention.

[0040] Figure 8 The present invention Figure 7 A partial enlarged view of point B in FIG.

[0041] Fig. 9 It is a schematic diagram of the structure among the rotating gear, the rotating toothed belt, the clamping groove, the clamping magnet, the annular test plate and the scraper of the present invention.

[0042] Fig.10 It is a schematic diagram of the structure of the detection module of the present invention from a first viewing angle.

[0043] Fig.11 It is a schematic diagram of the structure of the detection module of the present invention from a second viewing angle.

[0044] Fig.12 It is a schematic diagram of the structure between the detection module and the adjustment member of the present invention from a first viewing angle.

[0045] Fig.13 It is a schematic diagram of the structure between the detection module and the adjustment member of the present invention from a second viewing angle.

[0046] Description of the reference numerals: A, automotive exterior hot stamping film; 10, carrier layer; 11, high weather resistance coating; 12, base coating; 13, decorative layer; 14, transfer adhesive layer; 2, portable test box; 20, detection opening; 3, clamp; 4, detection module; 40, electric push rod; 41, cutting knife; 42, bonding plate; 21, rotating gear; 22, rotating toothed belt; 23, snap-on groove; 24, snap-on magnet; 25, annular test plate; 26, rotating motor; 30, guide plate; 31, guide column; 32, fixing plate; 3 3. Telescopic plate; 34. Telescopic compression spring; 35. Linkage column; 36. Guide arc groove; 37. Clamping plate; 38. Synchronous belt; 39. Guide motor; 50. Right-angle trapezoidal linkage plate; 5. Down-pressing assembly; 51. Vertical plate; 52. Right-angle connecting rod; 53. Down-pressing roller; 43. Detection threaded rod; 44. Detection frame No. 1; 45. Detection frame No. 2; 46. Telescopic frame; 47. Reset spring; 48. Detection motor; 6. Shovel; 7. Adjustment member; 70. Adjustment roller; 71. Adjustment belt; 72. Adjustment motor. DETAILED DESCRIPTION

[0047] The following is combined with Figure 1-Figure 13 This application is described in further detail.

[0048] The present application proposes an automobile exterior hot stamping film and a weather resistance testing device thereof, which involves an automobile exterior hot stamping film and a special device for performing weather resistance testing on the automobile exterior hot stamping film A.

[0049] For automotive exterior hot stamping films:

[0050] The material of the carrier layer is release PET. The appearance effect of the side of the release PET in contact with the high weather resistance coating (release side) can be divided into: high gloss, flat gloss, and matte according to the glossiness.

[0051] The base coating has a thickness of 1-2 μm and is an acrylate system coating.

[0052] The material of the decorative layer is ink or metal plating or a laminated combination of the two materials.

[0053] The transfer adhesive layer is one or more of polyurethane, acrylic, polyester, chloroacetic resin, etc., and the thickness is 2-5 μm.

[0054] For high weather resistance coating liquid:

[0055] Fluorocarbon resin, light stabilizer, ultraviolet absorber, nano zinc oxide, anti-hydrolysis stabilizer, adhesion promoting resin and isocyanate are dissolved in an organic solvent to prepare a high-weather-resistant coating liquid, wherein the solid content of the high-weather-resistant coating liquid is 45-65%.

[0056] The fluorocarbon resin is selected from one or a combination of at least two of polyvinylidene fluoride, polyvinyl fluoride, polychlorotrifluoroethylene, polytetrafluoroethylene, or polyhexafluoropropylene.

[0057] The light stabilizer is a hindered amine light stabilizer;

[0058] The ultraviolet absorber is a triazine ultraviolet absorber;

[0059] The particle size of nano zinc oxide is 20nm-60nm;

[0060] The hydrolysis resistance agent is polycarbodiimide;

[0061] The adhesion-promoting resin is a thermoplastic acrylic resin;

[0062] The isocyanate is selected from one or a combination of at least two of toluene diisocyanate trimer or polymer, hexamethylene diisocyanate trimer or polymer, or isophorone diisocyanate trimer or polymer.

[0063] The preparation method of the hot stamping film includes the following steps: (1) coating a highly weather-resistant coating liquid on the release surface of a carrier layer 10, placing it in a circulating oven for curing treatment, and forming a highly weather-resistant coating 11; (2) setting a primer layer 12 on the coating side of the semi-finished product coated with the highly weather-resistant coating; (3) setting a decorative layer 13 on the primer layer 12, wherein the decorative layer material is ink or metal plating or a stacked combination of the two materials; (4) setting a transfer adhesive layer 14 on the decorative layer 13; further, during the first step, the circulating oven drying temperature of the highly weather-resistant coating treatment is 150°C and the time is 2 minutes; further, during the second step, the circulating oven temperature of the primer layer 12 is 80°C and the time is 2 minutes; further, during the fourth step, the circulating oven temperature of the transfer adhesive layer 14 is 80°C and the time is 2 minutes.

[0064] Embodiment 1:

[0065] See also Figure 1 and Figure 2 As shown, firstly, the present application discloses an automobile exterior hot stamping film, which is provided with a carrier layer 10, a high weather resistance coating 11, a primer layer 12, a decorative layer 13 and a transfer adhesive layer 14 in sequence from top to bottom.

[0066] Among them, the high weather resistance coating liquid provided in this embodiment includes:

[0067] 70% polytetrafluoroethylene type fluorocarbon resin, 1% hindered amine light stabilizer, 3% triazine UV absorber, 2% nano zinc oxide, 9% adhesion promoting resin, 15% isocyanate.

[0068] The above raw materials are dispersed in an organic solvent to form a fluorocarbon coating liquid with a solid content of 50%. The organic solvent is butyl acetate and butanone. The thickness of the high weather-resistant coating 11 formed after curing is 20 μm. The performance test results of the prepared high weather-resistant coating 11 are shown in Table 1.

[0069] Embodiment 2:

[0070] The high weather resistance coating liquid provided in this embodiment includes:

[0071] 70% polytetrafluoroethylene type fluorocarbon resin, 1% hindered amine light stabilizer, 3% triazine UV absorber, 2% nano zinc oxide, 9% adhesion promoting resin, 15% isocyanate.

[0072] The above raw materials are dispersed in an organic solvent to form a fluorocarbon coating liquid with a solid content of 40%, and the organic solvent is butyl acetate and butanone; the thickness of the high weather-resistant coating 11 formed after curing is 16 μm. The performance test results of the prepared high weather-resistant coating 11 are shown in Table 1.

[0073] Embodiment three:

[0074] The high weather resistance coating liquid provided in this embodiment includes:

[0075] 70% polyvinylidene fluoride type fluorocarbon resin, 1% hindered amine light stabilizer, 3% triazine UV absorber, 2% nano zinc oxide, 9% adhesion promoting resin, 15% isocyanate.

[0076] The above raw materials are dispersed in an organic solvent to form a fluorocarbon coating liquid with a solid content of 50%, and the organic solvent is butyl acetate and butanone; the thickness of the high weather-resistant coating 11 formed after curing is 20 μm. The performance test results of the prepared high weather-resistant coating 11 are shown in Table 1.

[0077] Embodiment 4:

[0078] The high weather resistance coating liquid provided in this embodiment includes:

[0079] 60% polytetrafluoroethylene type fluorocarbon resin, 1% hindered amine light stabilizer, 3% triazine UV absorber, 2% nano zinc oxide, 16% adhesion promoting resin, 18% isocyanate.

[0080] The above raw materials are dispersed in an organic solvent to form a fluorocarbon coating liquid with a solid content of 50%. The organic solvent is butyl acetate and butanone; the thickness of the high weather-resistant coating 11 formed after curing is 20 μm. The performance test results of the prepared high weather-resistant coating 11 are shown in Table 1.

[0081] Comparative Example 1:

[0082] The high weather resistance coating liquid provided in this embodiment includes:

[0083] 70% polytetrafluoroethylene type fluorocarbon resin, 1% hindered amine light stabilizer, 3% triazine UV absorber, 2% nano zinc oxide, 9% adhesion promoting resin, 15% isocyanate.

[0084] The above raw materials are dispersed in an organic solvent to form a fluorocarbon coating liquid with a solid content of 50%, and the organic solvent is butyl acetate and butanone; the thickness of the high weather-resistant coating 11 formed after curing is 8 μm. The performance test results of the prepared high weather-resistant coating 11 are shown in Table 1.

[0085] Comparative Example 2:

[0086] The high weather resistance coating liquid provided in this embodiment includes:

[0087] 70% polytetrafluoroethylene type fluorocarbon resin, 1% hindered amine light stabilizer, 2% nano zinc oxide, 12% adhesion promoting resin, 15% isocyanate.

[0088] The above raw materials are dispersed in an organic solvent to form a fluorocarbon coating liquid with a solid content of 50%, and the organic solvent is butyl acetate and butanone; the thickness of the high weather-resistant coating 11 formed after curing is 20 μm. The performance test results of the prepared high weather-resistant coating 11 are shown in Table 1.

[0089] Comparative Example 3:

[0090] The high weather resistance coating liquid provided in this embodiment includes:

[0091] 70% polytetrafluoroethylene type fluorocarbon resin, 1% hindered amine light stabilizer, 3% triazine UV absorber, 11% adhesion promoting resin, 15% isocyanate.

[0092] The above raw materials are dispersed in an organic solvent to form a fluorocarbon coating liquid with a solid content of 50%, and the organic solvent is butyl acetate and butanone; the thickness of the high weather-resistant coating 11 formed after curing is 20 μm. The performance test results of the prepared high weather-resistant coating 11 are shown in Table 1.

[0093] Comparative Example 4:

[0094] The high weather resistance coating liquid provided in this embodiment includes:

[0095] 74% polytetrafluoroethylene type fluorocarbon resin, 1% hindered amine light stabilizer, 3% triazine UV absorber, 2% nano zinc oxide, 20% isocyanate.

[0096] The above raw materials are dispersed in an organic solvent to form a fluorocarbon coating liquid with a solid content of 50%, and the organic solvent is butyl acetate and butanone; the thickness of the high weather-resistant coating 11 formed after curing is 20 μm. The performance test results of the prepared high weather-resistant coating 11 are shown in Table 1.

[0097] Performance test results of hot stamping films of Examples 1-4 and Comparative Examples 1-4

[0098] project Adhesion Salt spray test Chemical resistance UV aging High pressure washing Stone impact test Example 1 Level 0 PASS PASS PASS PASS PASS Example 2 Level 0 PASS PASS PASS PASS PASS Example 3 Level 0 PASS PASS PASS PASS PASS Example 4 Level 0 PASS PASS PASS PASS PASS Comparative Example 1 Level 0 NG OK NG NG NG Comparative Example 2 Level 0 OK OK NG OK OK Comparative Example 3 Level 0 OK OK NG OK OK Comparative Example 4 Level 3 NG NG NG NG NG

[0099] Table 1

[0100] It can be seen from the performance test results of the hot stamping film in Examples 1-4 that the hot stamping film suitable for automobile exterior in the present application not only meets the decorative requirements of automobile exterior, but also, because the surface protective layer uses a fluorocarbon high weather resistance material with better comprehensive performance, the hot stamping 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.

[0101] It can be seen from Comparative Example 1 that when the thickness of the high weather-resistant protective layer is too thin, it cannot pass the salt spray test, UV aging test, and stone impact test; it can be seen from Comparative Examples 2 and 3 that not adding UV absorbers and nano zinc oxide to the high weather-resistant coating 11 will greatly weaken the UV aging resistance of the hot stamping film; it can be seen from Comparative Example 4 that not adding adhesion-promoting resin will significantly affect the adhesion between the high weather-resistant coating and the base coating 12, thereby affecting the salt spray test, chemical medium resistance, UV aging test, high-pressure washing and stone impact test.

[0102] In addition, the present application also proposes a special weather resistance testing device for testing the weather resistance of the automotive exterior hot stamping film A.

[0103] See also Figure 1 , Figure 2 and Figure 3 As shown, the weather resistance testing device for the automobile exterior hot stamping film A includes a portable test box 2 provided with a handle for easy movement, a detection opening 20 for placing the hot stamping film is also provided on one side of the portable test box 2, and a clamp 3 for clamping the hot stamping film is provided at the detection opening 20 of the portable test box 2.

[0104] A detection module 4 is also provided in the portable test box 2. The detection module 4 includes a plurality of cutting knives 41 for cutting the automobile exterior hot stamping film A and an electric push rod 40 extending vertically downward. The output end of the electric push rod 40 passes through the portable test box 2 downward.

[0105] It should be noted that the function of the clamp 3 is to clamp the automobile exterior hot stamping film A and control the automobile exterior hot stamping film A to move.

[0106] The detection module 4 mainly performs adhesion detection on the automobile exterior hot stamping film A, and detects the adhesion of the automobile exterior hot stamping film A on the automobile surface.

[0107] During the specific implementation, firstly, a number of blocks of automobile exterior hot stamping films A are randomly intercepted from the produced automobile exterior hot stamping films A, and then they are placed in the detection opening 20 of the portable test box 2. At this time, they are clamped by the clamper 3, and the automobile exterior hot stamping film A is driven into the interior of the portable test box 2. Then the detection module 4 performs adhesion detection on the automobile exterior hot stamping film A entering the portable detection box.

[0108] See also Figure 4 , Figure 5 and Figure 6 As shown, the holder 3 includes four groups of guide plates 30 symmetrically distributed in the length direction of the portable test box 2, and the four groups of guide plates 30 are symmetrically distributed in pairs.

[0109] Four groups of guide columns 31 are symmetrically distributed on both sides of the length direction of the portable test box 2. The four groups of guide columns 31 are threaded structures, and the four groups of guide columns 31 are respectively screwed with horizontally sliding fixed plates 32. A telescopic plate 33 is slidably installed at the bottom of the fixed plate 32, and a telescopic compression spring 34 is connected between the telescopic plate 33 and the fixed plate 32.

[0110] A linkage column 35 extending toward the guide plate 30 is connected to one side of the telescopic plate 33 close to the guide plate 30 , and a guide arc groove 36 for the linkage column 35 to slide is provided on the guide plate 30 .

[0111] A clamping plate 37 is provided at one end of the telescopic plate 33 away from the fixed plate 32 .

[0112] A synchronous belt 38 is sleeved on one side of the four groups of guide posts 31 , and a guide motor 39 is connected to the guide posts 31 on one side.

[0113] In the initial state, the two clamping plates 37 disposed in the portable test box 2 are located at the detection opening 20 of the portable test box 2 , and the clamping plates 37 extend outward from the detection opening 20 of the portable test box 2 .

[0114] It should also be noted that one side of the clamping plate 37 is an arc-shaped structure, and the arc-shaped structures of the two clamping plates 37 correspond to each other.

[0115] When it is necessary to test the automobile exterior hot stamping film A, first place the automobile exterior hot stamping film A between the two clamping plates 37, then press the start button on the portable test box 2, at this time the guide motor 39 is powered on and started, the guide motor 39 drives the guide column 31 to rotate, and then the guide column 31 drives the clamping plate 37 set on the telescopic plate 33 to move synchronously through the fixed plate 32, and they first approach each other during the movement, and clamp the automobile exterior hot stamping film A placed between the two clamping plates 37, after the clamping plate 37 clamps one side of the automobile exterior hot stamping film A, the two clamping plates 37 move synchronously toward the inside of the portable test box 2, until the automobile exterior hot stamping film A enters the inside of the portable test box 2 from the detection opening 20 of the portable test box 2, until the automobile exterior hot stamping film A rests on the annular test plate 25 in the portable test box 2.

[0116] Look again Figure 6 and Figure 7 As shown, a guide arc groove 36 is provided on the guide plate 30, and the linkage column 35 on the side wall of the telescopic plate 33 is inserted into the guide arc groove 36 of the guide plate 30, and the shape of the guide arc groove 36 is a special-shaped structure.

[0117] However, when the clamping plate 37 moves, the guiding arc groove 36 of the guide plate 30 can control the two clamping plates 37 to move synchronously, and the clamping plates 37 are in a separated state in the initial state. When the automobile exterior hot stamping film A is placed between the two clamping plates 37, as the fixed plate 32 and the telescopic plate 33 move, the clamping plates 37 connected to the telescopic plate 33 will gradually change from a separated state to a state close to each other. At this time, the automobile exterior hot stamping film A can be clamped. Then the two clamping plates 37 remain close to each other and move toward the inside of the portable test box 2. After they move to the specified position, the two clamping plates 37 separate again, so that the automobile exterior hot stamping film A is separated from the clamping plates 37, and at the same time, the automobile exterior hot stamping film A is pasted to the annular test plate 25 in the portable test box 2.

[0118] See also Figure 8 , Fig. 9 and Fig.10 As shown, the portable test box 2 in this application is symmetrically provided with rotating gears 21 on both sides in the length direction, and a rotating toothed belt 22 is commonly provided on the two rotating gears 21. The outer side of the rotating toothed belt 22 is provided with a plurality of annular test plates 25 of different materials that are bonded to the automobile exterior hot stamping film A.

[0119] A snap-in groove 23 is formed on the annular test plate 25 and the rotating toothed belt 22 . Metal sheets are evenly distributed in the snap-in groove 23 . A snap-in magnet 24 is placed in the snap-in groove 23 to connect the annular test plate 25 and the rotating toothed belt 22 .

[0120] It should be noted that the annular test plate 25 is mounted on the rotating toothed belt 22 by means of a clamping connection, and the materials of the annular test plate 25 are different. The annular test plate 25 has the following materials: iron sheet material, plastic material and carbon fiber material.

[0121] The annular test plate 25 is a consumable, and when it needs to be replaced, it can be replaced by a quick disassembly and installation method.

[0122] During the specific implementation process, when the annular test plate 25 needs to be replaced, the clamping magnet 24 in the clamping groove 23 is taken out, and the limiting structure between the magnet annular test plate 25 and the rotating toothed belt 22 is lost, so it can be removed from the side. When replacing the new annular test plate 25, first put it on the specified position of the rotating toothed belt 22, align the clamping groove 23 of the annular test plate 25 with the clamping groove 23 on the rotating toothed belt 22, and then place the clamping magnet 24 into the clamping groove 23, so that the clamping magnet 24 is tightly adsorbed in the clamping groove 23, thereby limiting the annular test plate 25 to prevent the annular test plate 25 that is attached to the outer side of the rotating toothed belt 22 from slipping when the rotating toothed belt 22 rotates, thereby ensuring the synchronous rotation between the rotating toothed belt 22 and the annular test plate 25.

[0123] Replay Figure 4 and Figure 5 As shown, when the clamping plate 37 clamps the automobile exterior hot stamping film A and drives it to move toward the inside of the portable test box 2, the automobile exterior hot stamping film A is prepared before the adhesion test, that is, the automobile exterior hot stamping film A is posted.

[0124] A right-angle trapezoidal linkage plate 50 is connected to one side of the fixing plate 32 , and the inclined surface structure of the right-angle trapezoidal linkage plate 50 is arranged at one end away from the fixing plate 32 .

[0125] A pressing assembly 5 for pasting the automobile exterior hot stamping film A is also provided on the inner wall of the portable test box 2. The pressing assembly 5 includes a vertical plate 51, a right-angle connecting rod 52 and a pressing roller 53. The vertical plate 51 is symmetrically installed on the inner wall of the portable test box 2 along the length direction of the portable test box 2. The middle part of the right-angle connecting rod 52 is hingedly installed on the vertical plate 51 through a torsion spring, and one end of the two right-angle connecting rods 52 is connected to the pressing roller 53, and the other ends of the two right-angle connecting rods 52 extend downward and correspond to the right-angle trapezoidal linkage plate 50.

[0126] In the initial state, the lower pressing roller 53 on the right-angle connecting rod 52 tilts upward, so that there is a certain distance between the lower pressing roller 53 and the rotating toothed belt 22, which is convenient for the automobile exterior hot stamping film A to move.

[0127] When the fixed plate 32 on the clamping plate 37 moves a certain distance toward the depth of the portable test box 2, the right-angled trapezoidal linkage plate 50 on the fixed plate 32 will contact the side of the right-angled connecting rod 52 away from the lower pressing roller 53, and then the right-angled trapezoidal linkage plate 50 will squeeze the side of the right-angled connecting rod 52 away from the lower pressing roller 53, and it will bend upward after being subjected to the external squeezing force, and the lower pressing roller 53 provided at the other end of the right-angled connecting rod 52 will move downward around the hinge point until the lower pressing roller 53 squeezes the automobile exterior hot stamping film A and forces it to be pressed on the annular test plate 25 of the rotating toothed belt 22. As the lower pressing roller 53 rotates, the automobile exterior hot stamping film A can fit tightly on the annular test plate 25, and then after standing for a period of time, the automobile exterior hot stamping film A and the annular test plate 25 are bonded.

[0128] The automobile exterior hot stamping film A is pasted on multiple groups of annular test plates 25 of different materials at one time.

[0129] After the automobile exterior hot stamping film A is attached to the annular test plate 25, the purpose of standing for a period of time is to simulate the steps of attaching the automobile exterior hot stamping film A to the outer shell of the car, simulate the actual situation of car film pasting, and ensure the stability of the automobile exterior hot stamping film A.

[0130] See also Fig.10 and Fig.11As shown, after the automobile exterior hot stamping film A completes the laminating step, the automobile exterior hot stamping film A can be tested for adhesion. The detection module 4 also includes a detection threaded rod 43. The detection threaded rod 43 is arranged on the inner wall of the portable test box 2. A detection frame No. 1 44 and a detection frame No. 2 45 are screwed on the detection threaded rod 43. The bottom of the No. 1 detection frame and the No. 2 detection frame 45 are both provided with a telescopic frame 46 that can be telescoped up and down. A reset spring 47 is provided between the two telescopic frames 46 and the corresponding No. 1 detection frame 44 and No. 2 detection frame 45. The cutting knife 41 is arranged in the telescopic frame 46 of the No. 1 detection frame 44, and the adhesion plate 42 is arranged in the telescopic frame 46 of the No. 2 detection frame 45.

[0131] A detection motor 48 is connected to the outer wall of the portable test box 2 , and an output end of the detection motor 48 is connected to the detection threaded rod 43 .

[0132] It should be noted that a telescopic frame 46 is slidably provided on the first detection frame 44 and the second detection frame 45 , and a cutting knife 41 and an adhesive plate 42 are respectively provided at the bottom of the telescopic frame 46 .

[0133] When testing the automobile exterior hot stamping film A, press the test button to start the test motor 48. The test motor 48 controls the No. 1 test frame 44, the corresponding telescopic frame 46 and the cutting knife 41 connected to the bottom of the telescopic frame 46 through the test threaded rod 43 to move to the designated test area inside the portable test box 2. Then the electric push rod 40 moves downward, and the output end of the electric push rod 40 drives the telescopic frame 46 and the cutting knife 41 at the bottom thereof to move downward until the cutting knife 41 cuts the automobile exterior hot stamping film A arranged on the annular test plate 25 directly below, and cuts the automobile exterior hot stamping film A into several small pieces of automobile exterior hot stamping film A of the same size.

[0134] It should be noted that when the cutting blade 41 cuts the automobile exterior hot stamping film A, the automobile exterior hot stamping film A on the multiple annular test plates 25 of different materials are cut into a plurality of small pieces of automobile exterior hot stamping film A of the same size.

[0135] See also Fig.10As shown, after the cutting knife 41 has completed cutting the automotive exterior hot stamping film A, the detection motor 48 is continuously controlled to move the second detection frame 45, its corresponding telescopic frame 46 and the bonding plate 42 to the top of the automotive exterior hot stamping film A that has been cut; then the electric push rod 40 is started again, and the output end of the electric push rod 40 presses down the telescopic frame 46 on the second detection frame 45, so that the bonding plate 42 is bonded to the cut automotive exterior hot stamping film A. After the bonding plate 42 is bonded to the cut automotive exterior hot stamping film A, the electric push rod 40 controls the telescopic frame 46 on the second detection frame 45 to move the bonding plate 42 to the top of the cut automotive exterior hot stamping film A. The corresponding telescopic frame 46 on the shrinking frame 46 frame moves upward until the adhesive plate 42 is separated from the cut automobile exterior hot stamping film A. The falling off of the automobile exterior hot stamping film A cut into small pieces is carefully observed through the observation screen and recorded in detail. Then, the cut automobile exterior hot stamping film A is subjected to multiple adhesive pulling operations at different positions on the same annular test plate 25, and the situation of the automobile exterior hot stamping film A falling off after each adhesive pulling is recorded in detail. It is separated according to the recorded data to obtain the adhesion performance of the automobile exterior hot stamping film A.

[0136] It should be noted that, first, the present application can perform multiple adhesion tests at different positions on the cut automotive exterior hot stamping film A on the annular test plate 25 of the same material, thereby realizing the adhesion performance of the automotive exterior hot stamping film A under products of the same material.

[0137] Secondly: the present application can also perform adhesion testing on multiple annular test plates 25 of different materials at the same position, thereby realizing the detection of adhesion performance of the automotive exterior hot stamping film A on products of different materials.

[0138] Through the above two different detection methods, the applicability and efficiency of the weather resistance detection device in this application can be greatly improved.

[0139] For further information, see Figure 1 As shown, a plurality of powered observation cameras are arranged on the inner wall of the portable test box 2, and an observation screen connected to the observation cameras is arranged at the upper end of the portable test box 2.

[0140] A start button for controlling power on and off is provided at one end of the portable test box 2 connected to the observation screen, and a detection button is also provided at one end of the portable test box 2 connected to the observation screen.

[0141] The observation camera and the observation screen cooperate with each other to monitor the position of the annular test plate 25 in real time, and the monitored image can be transmitted to the observation screen in real time, so that the operator can observe the testing process of the automotive exterior hot stamping film A inside the portable test box 2.

[0142] Example 2: On the basis of Example 1, in order to ensure the continuity of the weather resistance test of the automobile exterior hot stamping film A by the entire device, the present application also proposes a scraper 6, which is used to scrape off the automobile exterior hot stamping film A that has been bonded to the surface of the annular test plate 25 and has completed the test, so as to avoid the used automobile exterior hot stamping film A from remaining on the annular test plate 25, causing the automobile exterior hot stamping film A to affect the performance testing of subsequent products.

[0143] See also Fig. 9 As shown, after the automobile exterior hot stamping film A completes the weather resistance test, the rotating toothed belt 22 controls the annular test plate 25 to rotate together until the portion of the annular test plate 25 to which the automobile exterior hot stamping film A is adhered moves to directly below the rotating toothed belt 22. At this time, the scraper 6 on the portable test box 2 removes the automobile exterior hot stamping film A adhered to the annular test plate 25, so as to facilitate subsequent weather resistance tests of the automobile exterior hot stamping film A in other sessions.

[0144] A scraper 6 is provided at one end of the portable test box 2 close to the rotating toothed belt 22 , and the scraper 6 is attached to the surface of the rotating toothed belt 22 . A discharging port that can be opened and closed is provided at the bottom of the portable test box 2 .

[0145] Example 3: Based on Example 1, in order to further ensure the efficiency and accuracy of the weather resistance test of the automotive exterior hot stamping film A, refer to Fig.11 , Fig.12 and Fig.13 As shown, the present application further proposes an adjusting member 7, which includes two symmetrical adjusting rollers 70 rotatably installed in the No. 1 detection frame 44 and the No. 2 detection frame 45, and an adjusting belt 71 is sleeved on the adjusting roller 70, and a cutting knife 41 and an adhesive plate 42 are respectively adhered to the two adjusting belts 71.

[0146] The size of the cutting blade 41 on one side of the adjusting belt 71 gradually decreases at equal intervals along the moving direction of the corresponding adjusting belt 71 .

[0147] An adjusting motor 72 is installed on the adjusting roller 70, and a replacement groove for replacing the cutting knife 41 and the bonding plate 42 is opened at one side of the portable test box 2 corresponding to the position of the No. 1 detection frame 44 and the No. 2 detection frame 45, and a sealing plate is provided in the replacement groove.

[0148] It should be noted that in the first embodiment, the cutting knife 41 and the adhesive plate 42 are installed on the telescopic frame 46 by means of a snap-on connection, but they are single. Each time after the inspection of the automotive exterior hot stamping film A is completed, the adhesive plate 42 needs to be replaced, and the operation is relatively complicated. In order to reduce the frequency of its replacement, the present application proposes an adjustment part 7.

[0149] During the specific implementation process, an adjusting belt 71 is provided on the telescopic frame 46, and the adhesive plate 42 is pre-connected to the adjusting belt 71 at equal intervals, so that a plurality of adhesive plates 42 are provided on the adjusting belt 71, and the plurality of adhesive plates 42 can be switched in position. When the adhesive plates 42 are used in the first weather resistance test of the automobile exterior hot stamping film A, the adjusting motor 72 is started, and the adjusting motor 72 controls the adjusting belt 71 to rotate, so that the used adhesive plates 42 on the adjusting belt 71 can be switched out, and the new unused adhesive plates 42 are moved to the specified position, which realizes the automatic switching of the adhesive plates 42, can greatly reduce the manual participation in the replacement of the adhesive plates 42, can not only improve the efficiency of the detection of the automobile exterior hot stamping film A, reduce the damage caused by the manual replacement process, but also can greatly reduce the dust from entering the portable test box 2, ensure the cleanliness of the automobile exterior hot stamping film A when it is adhered to the annular test plate 25, and avoid the dust from affecting the detection of the adhesion performance of the automobile exterior hot stamping film A.

[0150] Similarly, the cutting knives 41 are also arranged at equal intervals on another adjusting belt 71, but it should be noted that the cutting knives 41 are durable products, so the sizes of the several cutting knives 41 on the corresponding adjusting belt 71 are different, so that different cutting knives 41 can be adjusted to ensure that after the cutting knives 41 cut the automobile exterior hot stamping film A, small pieces of automobile exterior hot stamping film A of different sizes can be produced.

[0151] Thus, small square-shaped automobile exterior hot stamping films A of different sizes can be obtained, so that the adhesion performance of automobile exterior hot stamping films A of different areas under the same material can be tested.

[0152] During operation: the first step is to randomly select a number of pieces of the automobile exterior hot stamping film A from the produced automobile exterior hot stamping film A to ensure the randomness of the selection of the automobile exterior hot stamping film A.

[0153] Step 2: Then place the automobile exterior hot stamping film A between the two clamping plates 37, and then the clamping plates 37 clamp it, and control the clamped automobile exterior hot stamping film A to move to the depth of the portable test box 2 until it moves to the designated detection area.

[0154] Step 3: After the fixed plate 32 on the clamping plate 37 moves a certain distance into the depth of the portable test box 2, the lower pressure roller 53 will move downward around the hinge point until the lower pressure roller 53 squeezes the automobile exterior hot stamping film A and forces it to be pressed on the annular test plate 25 of the rotating toothed belt 22. As the lower pressure roller 53 rotates and the automobile exterior hot stamping film A moves, the automobile exterior hot stamping film A can fit tightly on the annular test plate 25. After standing for a period of time, the automobile exterior hot stamping film A and the annular test plate 25 are bonded.

[0155] Step 4: Then the output end of the electric push rod 40 drives the telescopic frame 46 and the cutting knife 41 at the bottom thereof to move downward until the cutting knife 41 cuts the automobile exterior hot stamping film A arranged on the annular test plate 25 directly below, and cuts the automobile exterior hot stamping film A into several small pieces of automobile exterior hot stamping film A of the same size.

[0156] Step 5: After the cutting knife 41 has completed cutting the automotive exterior hot stamping film A, the detection motor 48 is continuously controlled to move the No. 2 detection frame 45, its corresponding telescopic frame 46 and the bonding plate 42 to the top of the automotive exterior hot stamping film A that has been cut; then the electric push rod 40 is started again, and the output end of the electric push rod 40 presses down the telescopic frame 46 on the No. 2 detection frame 45, so that the bonding plate 42 is bonded to the cut automotive exterior hot stamping film A. After the bonding plate 42 is bonded to the cut automotive exterior hot stamping film A, the electric push rod 40 controls the No. 2 detection frame 45 to move the No. 2 detection frame 45 to the top of the automotive exterior hot stamping film A. The corresponding telescopic frame 46 on the telescopic frame 46 frame moves upward until the adhesive plate 42 is separated from the cut automobile exterior hot stamping film A. The falling off of the automobile exterior hot stamping film A cut into small pieces is carefully observed through the observation screen and recorded in detail. Then, the cut automobile exterior hot stamping film A is subjected to multiple adhesive pulling operations at different positions on the same annular test plate 25, and the situation of the automobile exterior hot stamping film A falling off after each adhesive pulling is recorded in detail. It is separated according to the recorded data to obtain the adhesion performance of the automobile exterior hot stamping film A.

[0157] Step 6: After the adhesion plate 42 is used, a plurality of adhesion plates 42 are provided on the adjustment belt 71, and the plurality of adhesion plates 42 can be switched in position. The adjustment motor 72 controls the rotation of the adjustment belt 71 so that the used adhesion plates 42 on the adjustment belt 71 can be switched out, and the unused adhesion plates 42 are moved to the designated position, thereby realizing the automatic switching of the adhesion plates 42.

[0158] 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 hot stamping film for automobile exterior, characterized in that: The invention comprises a carrier layer (10), a high weather resistance coating (11), a base coating (12), a decorative layer (13) and a transfer adhesive layer (14).

2. The automotive exterior hot stamping film according to claim 1, characterized in that: The high weather resistance coating (11) is composed of a high weather resistance coating liquid, the raw materials of which, by weight percentage, include 50% to 85% of fluorocarbon resin, 0.3% to 1% of light stabilizer, 1% to 3% of ultraviolet absorber, 1% to 2% of nano zinc oxide, 0.5% to 3% of anti-hydrolysis stabilizer, 5% to 20% of adhesion promoting resin and 5% to 20% of isocyanate; the total amount of the fluorocarbon resin, light stabilizer, ultraviolet absorber, anti-hydrolysis stabilizer, polyacrylate, adhesion promoting resin and isocyanate is 100%.

3. A weather resistance testing device for automobile exterior hot stamping film, using the automobile exterior hot stamping film as claimed in claim 2, characterized in that: The portable test box (2) comprises a portable test box (2), one side of which is provided with a detection opening (20) for placing a hot stamping film, and a clamp (3) for clamping the hot stamping film is provided at the detection opening (20) of the portable test box (2); The portable test box (2) is also provided with a detection module (4) for performing performance detection on the high weather resistance coating (11), the detection module (4) comprising two electric push rods (40) slidably arranged on the inner wall of the portable test box (2), and the portable test box (2) is also provided with a cutting knife (41) and an adhesive plate (42).

4. The weather resistance testing device for automobile exterior hot stamping film according to claim 3, characterized in that: The portable test box (2) is provided with rotating gears (21) on both sides in the length direction, and a rotating toothed belt (22) is provided on the two rotating gears (21), and a plurality of annular test plates (25) are sleeved on the outer side of the rotating toothed belt (22); A rotating motor (26) is provided on one side of the rotating gear (21), and the rotating motor (26) is arranged on the outer wall of the portable test box (2).

5. The weather resistance testing device for automobile exterior hot stamping film according to claim 4, characterized in that: The annular test plate (25) and the rotating toothed belt (22) are both provided with a clamping groove (23), a metal sheet is integrated in the clamping groove (23), and a clamping magnet (24) is provided in the clamping groove (23) for connecting the annular test plate (25) and the rotating toothed belt (22).

6. The weather resistance testing device for automobile exterior hot stamping film according to claim 3, characterized in that: The clamp (3) comprises four groups of guide plates (30) distributed in the length direction of the portable test box (2), and the four groups of guide plates (30) are symmetrically distributed in pairs; The portable test box (2) is provided with four groups of guide columns (31) symmetrically distributed on both sides in the length direction, the four groups of guide columns (31) are threaded structures, and the four groups of guide columns (31) are respectively screwed with a horizontally sliding fixed plate (32), a telescopic plate (33) is slidably installed at the bottom of the fixed plate (32), and a telescopic compression spring (34) is connected between the telescopic plate (33) and the fixed plate (32); A side of the telescopic plate (33) close to the guide plate (30) is connected to a linkage column (35) extending toward the guide plate (30), and a guide arc groove (36) for the linkage column (35) to slide is provided on the guide plate (30); A clamping plate (37) is provided at one end of the telescopic plate (33) away from the fixed plate (32); One side of the four groups of guide posts (31) is sleeved with a synchronous belt (38), and one side of the guide posts (31) is connected to a guide motor (39).

7. The weather resistance testing device for automobile exterior hot stamping film according to claim 6, characterized in that: A right-angled trapezoidal linkage plate (50) is connected to one side of the fixed plate (32), and the inclined surface structure of the right-angled trapezoidal linkage plate (50) is arranged at an end away from the fixed plate (32); The inner wall of the portable test box (2) is also provided with a pressing assembly (5) for pasting the automobile exterior hot stamping film, and the pressing assembly (5) includes a vertical plate (51), a right-angle connecting rod (52) and a pressing roller (53). The vertical plate (51) is symmetrically installed on the inner wall of the portable test box (2) along the length direction of the portable test box (2), and the middle part of the right-angle connecting rod (52) is hingedly installed on the vertical plate (51) through a torsion spring, and one end of the two right-angle connecting rods (52) is connected to the pressing roller (53), and the other end of the two right-angle connecting rods (52) extends downward and corresponds to the right-angle trapezoidal linkage plate (50).

8. The weather resistance testing device for automobile exterior hot stamping film according to claim 3, characterized in that: The detection module (4) further comprises a detection threaded rod (43), the inner wall of the portable test box (2) is provided with a detection threaded rod (43), a first detection frame (44) and a second detection frame (45) are screwed onto the detection threaded rod (43), a telescopic frame (46) is provided at the bottom of the first detection frame and the second detection frame (45), a reset spring (47) is provided between the two telescopic frames (46) and the corresponding first detection frame (44) and second detection frame (45), a cutting knife (41) is provided in the telescopic frame (46) of the first detection frame (44), and an adhesive plate (42) is provided in the telescopic frame (46) of the second detection frame (45).

9. The weather resistance testing device for automobile exterior hot stamping film according to claim 8, characterized in that: A detection motor (48) is connected to the outer wall of the portable test box (2), and the output end of the detection motor (48) is connected to the detection threaded rod (43).

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