Color-changeable transfer printing film for automotive trim and preparation method of color-changeable transfer printing film

Abstract

The invention relates to an automobile interior color-changeable transfer film and a preparation method thereof, and relates to the technical field of automobile interior material manufacturing. The interior color-changeable transfer printing film preparation device comprises a cutting workbench, a tool changing unit is arranged on the cutting workbench and comprises a tool changing chain and guide frames arranged on the tool changing chain at equal intervals, and tools different in size and shape are arranged on the multiple guide frames correspondingly. The transfer printing film cutting device can solve the following problems in the prior art: firstly, when a transfer printing film is cut in the prior art, replacement of a cutter required by cutting is tedious due to the fact that a large number of screws and nuts need to be disassembled, and when the cutter is replaced, the cutter is contaminated by a large number of impurities, so that the cutting efficiency is improved; the cutting surface of the transfer printing film can be polluted in the subsequent cutting process of the cutter; and secondly, in the prior art, the stability of cutter installation is poor, and the cutter inclines or falls off during cutting.

Description

Technical Field

[0001] The present invention relates to the technical field of manufacturing automotive interior materials, and particularly relates to a color-changing transfer film for automotive interiors and a preparation method thereof. Background Art

[0002] A color-changing transfer film for automotive interiors is an automotive interior decoration material that achieves color change through specific technologies. This film can print different patterns or colors on the film through transfer technology and then apply it to the surface of automotive interiors, thereby achieving color change of the interiors. This film usually has good abrasion resistance and weather resistance, can maintain long-term color stability, and is easy to clean and maintain. The color-changing transfer film for automotive interiors can provide more personalized choices for car owners, making the interior of the car more unique and fashionable.

[0003] For example, a Chinese patent with the publication number CN112390064A discloses a film cutting device, which includes a bottom plate and a material pressing mechanism, a cutting mechanism, and a power mechanism arranged on the bottom plate. The material pressing mechanism is used to position the film, the cutting mechanism is movably arranged on the bottom plate for cutting the film, and the power mechanism is used to drive the cutting mechanism to move. The material pressing mechanism can position the film to be cut, thus avoiding the displacement of the film during the cutting process; the cutting mechanism is different from the traditional guillotine-type opening and closing cutting method, but uses mobile cutting. By moving the position of the cutting mechanism, the film where the cutting mechanism arrives can be accurately cut. Therefore, the size of the cutting mechanism is not limited by the width of the film, which can not only improve the cutting accuracy but also reduce the volume of the overall device, making the device lightweight, easy to move and use, and reducing production costs.

[0004] However, there are still some deficiencies in the above cutting device during actual use:

[0005] 1. First, in the prior art, when cutting the transfer film, there is only one set of cutting tools on the device. Replacing the cutting tools required for cutting is relatively cumbersome because a large number of screws and nuts need to be disassembled. Moreover, when replacing the cutting tools, a large amount of impurities will be contaminated on the cutting tools, and the cutting surface of the transfer film will be contaminated during the subsequent cutting process, thus affecting the quality of the prepared transfer film.

[0006] 2. Second, in the prior art, the stability of the cutting tool installation is poor. After the cutting tool cuts for a period of time, the cutting tool becomes loose due to external force, and the cutting tool tilts or falls off during subsequent cutting.

[0007] Therefore, under the viewpoints stated above, there is still room for improvement in the existing cutting device. Summary of the Invention

[0008] To solve the above problems, the present invention provides a color-changing transfer film for automotive interiors and a preparation method thereof, adopting the following technical solutions:

[0009] In the first aspect, the present application provides a color-changing transfer film for automotive interiors, comprising a transfer substrate, a transfer structure layer, a color-changing layer containing liquid crystal microcapsules, a protective layer, and a peelable adhesive layer, which are arranged in sequence from bottom to top.

[0010] The color-changing layer containing liquid crystal microcapsules consists of two parts, a wall material and a core material, and the core material is a liquid crystal material.

[0011] In the second aspect, the present application provides a preparation method for a color-changing transfer film for automotive interiors. The preparation method for a color-changing transfer film for automotive interiors is as follows:

[0012] S1. Preparation operation: First, prepare the materials for preparing the color-changing transfer film and select the required adhesives.

[0013] S2. Adhesion operation: Coat the adhesive on the transfer substrate and sequentially adhere the transfer structure layer, the color-changing layer containing liquid crystal microcapsules, the protective layer, and the peelable adhesive layer together.

[0014] S3. Drying and hot pressing: Place the coated transfer substrate in a ventilated and dry place to allow it to dry thoroughly, and perform hot pressing on the dried product.

[0015] S4. Cutting operation: Lay the hot-pressed transfer substrate flat on the cutting workbench, and perform equidistant cutting on it with a cutter. Subsequently, collect the color-changing transfer films of different shapes presented after cutting in the same package.

[0016] In the third aspect, regarding the preparation method for a color-changing transfer film for automotive interiors, the present application also relates to a preparation device for a color-changing transfer film for automotive interiors. The preparation device for a color-changing transfer film for automotive interiors includes a cutting workbench and a vertical and horizontal movement system arranged on the cutting workbench, and an installation bracket is provided on the vertical and horizontal movement system.

[0017] A tool changing unit is provided on the cutting workbench. The tool changing unit includes a tool changing chain, and guide frames are equidistantly arranged on the tool changing chain. A plurality of guide frames are respectively provided with tools of different sizes and shapes.

[0018] A tool changing box is installed on the cutting workbench to protect the tool changing chain, the guide frames, and the tools through the tool changing box.

[0019] Preferably, the tool changing unit further includes a lifting plate slidably installed along the height direction on the guide frame. A fixed magnetic attraction block is installed on one side of the lifting plate, and a passive magnetic attraction block is adsorbed on the fixed magnetic attraction block. The passive magnetic attraction block is installed on a horizontal plate, and the bottom of the horizontal plate is connected to the tool.

[0020] A reset tension spring is provided between the lifting plate and the guide frame.

[0021] Preferably, a switching electric push rod is installed on the tool changing box. The output end of the switching electric push rod penetrates downward through the tool changing box and abuts against the top end of the lifting plate. A material discharging opening for discharging tools is formed at the bottom of the tool changing box.

[0022] Preferably, a support plate for supporting the tool is connected to the mounting bracket. Two groups of symmetric limiting columns are connected to the support plate. Limiting holes for inserting and mounting the limiting columns are formed on the tool horizontal plate.

[0023] A limiting plate is also slidably mounted on the mounting bracket. A limiting card slot for limiting the limiting columns is formed on the limiting plate.

[0024] Preferably, a vertical plate is further installed on the cutting table. A control member for controlling the expansion and contraction of the limiting plate is provided on the vertical plate. The control member includes a control rack installed on the vertical plate. Two control gears are rotatably connected in the height direction of the mounting bracket. A synchronous gear is also provided on the mounting bracket. A synchronous belt is provided between the control gear near the bottom of the mounting bracket and the synchronous gear. An intermediate slot is formed in the middle of the limiting plate for the control gear to rotate. The synchronous gear is movably meshed with the control rack.

[0025] Preferably, a guiding member is further provided on the vertical plate. The guiding member includes a U-shaped frame slidably penetrating through the vertical plate, and a U-shaped groove for the U-shaped frame to penetrate through is formed on the vertical plate.

[0026] A first linkage rack is installed on the U-shaped frame. A linkage gear rotatably mounted on the vertical plate through a bracket is meshed with the first linkage rack. A second linkage rack slidably penetrating through the vertical plate and abutting against the mounting bracket is meshed with the linkage gear. A linkage compression spring is installed between the first linkage rack and the vertical plate.

[0027] Preferably, a cleaning member is further provided on the vertical plate. The cleaning member includes a cleaning frame hinged on the vertical plate. An activity slot for the cleaning frame to open and close is further formed on the vertical plate. A cleaning rack is horizontally slidable on the vertical plate. A plurality of cleaning brushes are rotatably arranged on the cleaning rack.

[0028] Preferably, a V-shaped connecting rod is further installed at the hinge of the cleaning frame.

[0029] Preferably, an opening and closing gear is further provided at the hinge of the cleaning frame. An opening and closing plate is installed on the lifting plate. A partial sawtooth structure is provided on the opening and closing plate. The sawtooth structure on the opening and closing plate is movably meshed with the opening and closing gear.

[0030] In summary, the present application includes at least one of the following beneficial technical effects:

[0031] 1. The present invention initially limits the horizontal plate through a limit post, and then the horizontal plate can be clamped through the cooperation of the support plate and the limit plate, which greatly improves the connection stability of the horizontal plate, the tool, and the mounting bracket, ensuring that the tool will not shake in the left - right and up - down directions during subsequent cutting. Thus, the tool is not prone to shaking during the moving cutting process, guaranteeing the accuracy and stability of cutting.

[0032] 2. The tool - changing unit of the present invention can realize the automatic switching of tools, greatly improving the efficiency of tool switching. It cannot be manually replaced, and during the automatic switching of tools in this application, the tool - changing unit can also guide the tool, ensuring the stability and safety of the tool and avoiding damage to the tool during the tool - changing process.

[0033] 3. The cleaning component of the present invention can clean the tool during the automatic switching of the tool, ensuring the cleanliness of the tool. When the tool cuts the color - changeable transfer film for automotive interiors, it can prevent the cut of the color - changeable transfer film for automotive interiors from being contaminated, thus affecting the connection stability between the color - changeable transfer film for automotive interiors and the automotive interior. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The present invention will be further described below in conjunction with the drawings and embodiments.

[0035] Figure 1 It is a schematic diagram of the main structure of the present invention.

[0036] Figure 2 It is a schematic diagram of the structure of the color - changeable transfer film for automotive interiors of the present invention.

[0037] Figure 3 It is a schematic diagram of the structure between the tool - changing unit and the control part of the present invention.

[0038] Figure 4 It is a schematic diagram of the first - perspective structure of the tool - changing unit of the present invention.

[0039] Figure 5 It is a schematic diagram of the second - perspective structure of the tool - changing unit of the present invention.

[0040] Figure 6 It is a schematic diagram of the structure between the limit post, the limit plate, the passive magnetic - attracting block, and the tool of the present invention.

[0041] Figure 7 It is a schematic diagram of the structure of the control part of the present invention.

[0042] Figure 8 It is a schematic diagram of the first - perspective structure of the guiding component of the present invention.

[0043] Figure 9It is a schematic structural diagram of the second perspective of the guiding component of the present invention.

[0044] Figure 10 It is a schematic structural diagram of the cleaning component of the present invention.

[0045] Figure 11 It is a schematic structural diagram between the cleaning component and the tool changing unit of the present invention.

[0046] Figure 12 It is a flowchart of the preparation method of the color - changeable transfer film for automobile interior of the present invention.

[0047] Explanation of reference numerals: 1. Color - changeable transfer film for automobile interior; 10. Transfer substrate; 11. Transfer structure layer; 12. Color - changeable layer containing liquid crystal microcapsules; 13. Protective layer; 14. Peelable adhesive layer; 2. Cutting workbench; 20. Horizontal and vertical movement system; 4. Mounting bracket; 6. Tool changing unit; 60. Tool changing chain; 61. Guide frame; 62. Tool; 63. Tool changing box; 64. Lifting plate; 65. Fixed magnetic attraction block; 66. Passive magnetic attraction block; 67. Horizontal plate; 68. Reset tension spring; 7. Switching electric push rod; 70. Material discharging port; 40. Support plate; 41. Limit post; 42. Limit hole; 43. Limit plate; 44. Limit card slot; 5. Vertical plate; 8. Control part; 80. Control rack; 81. Control gear; 82. Intermediate groove; 83. Synchronous gear; 84. Synchronous belt; 9. Guiding component; 90. C - shaped frame; 91. C - shaped groove; 92. First linkage rack; 93. Linkage gear; 94. Second linkage rack; 95. Linkage compression spring; 3. Cleaning component; 30. Cleaning frame; 31. Activity groove; 32. Cleaning rack; 33. Cleaning brush; 34. V - shaped connecting rod; 35. Opening and closing plate; 36. Opening and closing gear. Detailed implementation manners

[0048] The following is a further detailed description in conjunction with Figures 1 - 12 This application.

[0049] The embodiments of this application disclose a color - changeable transfer film for automobile interior and a preparation method. It is mainly applied in the preparation process of the color - changeable transfer film 1 for automobile interior. First, in the prior art, when the transfer film is cut, there is only a set of tools 62 on the device. When replacing the tools 62 required for cutting, a large number of screws and nuts need to be disassembled, resulting in a relatively cumbersome replacement. Moreover, when replacing the tools 62, a large amount of impurities will adhere to the tools 62, and during the subsequent cutting process of the tools 62, the cut surface of the transfer film will be contaminated, thereby affecting the quality of the prepared transfer film.

[0050] Secondly, in the prior art, the stability of the installation of the tools 62 is poor. After the tools 62 are cut for a period of time, the tools 62 will become loose due to external forces, and subsequent tilting or falling off of the tools 62 will occur during cutting.

[0051] Example 1:

[0052] Referring to Figure 2 as shown, this application proposes a color - changeable transfer film for automotive interiors, which includes a transfer substrate 10, a transfer structure layer 11, a color - change layer 12 containing liquid - crystal microcapsules, a protective layer 13, and a peelable adhesive layer 14 arranged in sequence from bottom to top.

[0053] The color - change layer 12 containing liquid - crystal microcapsules consists of two parts: a wall material and a core material, and the core material is a liquid - crystal material.

[0054] The transfer substrate 10 is usually made of high - performance polymer materials such as PET, PC, or PMMA, and needs to have high light transmittance, high temperature resistance, and flexibility to support subsequent processing.

[0055] The transfer structure layer 11 includes an ink - printed layer or a conductive layer (such as an ITO conductive layer), which is used for pattern design or electrical signal transmission to achieve dynamic control of the color - change layer.

[0056] Core material: Liquid - crystal materials (such as nematic and cholesteric liquid crystals) change the molecular arrangement through electric - field or temperature changes, thereby regulating the light transmittance or reflection color. For example, cholesteric liquid crystals can present a rainbow - color effect when the temperature changes, while nematic liquid crystals achieve a fast response through an electric field.

[0057] Wall material: Common materials include melamine resin, epoxy resin, or PMMA. Melamine resin is suitable for the high - temperature environment of automobiles due to its high temperature resistance and high mechanical strength; epoxy resin has excellent chemical corrosion resistance.

[0058] Transfer substrate 10: A transparent PET film with a thickness of 50μm (light transmittance ≥ 90%, temperature resistance 150°C).

[0059] Transfer structure layer 11: Gravure - printed ink containing an ITO conductive layer (sheet resistance ≤ 50Ω / sq, thickness 5μm).

[0060] Liquid - crystal microcapsule color - change layer:

[0061] Core material: Thermochromic cholesteric liquid crystal (Merck, model LC - 1000, temperature - sensitive range 25°C - 50°C, color gradient from blue → green → red).

[0062] Wall material: Melamine resin prepolymer (melamine - formaldehyde solution, solid content 40%).

[0063] Protective layer 13: UV - curable polyurethane acrylate coating (hardness ≥ 3H, scratch - resistant).

[0064] Peelable adhesive layer 14: Water - based acrylate pressure - sensitive adhesive (peeling force 0.5 - 1.0N / 25mm).

[0065] Preparation process

[0066] Step 1: Preparation of liquid crystal microcapsules (in-situ polymerization method)

[0067] Mix cholesteric liquid crystal (20 g) with Span-80 emulsifier (1 g), add deionized water (100 mL), and shear emulsify at 5000 rpm for 15 minutes to form a liquid crystal emulsion (droplet size 5 - 10 μm).

[0068] Heat up to 55 °C, add melamine resin prepolymer (30 g), adjust the pH to 4.5, and react for 3 hours to form microcapsules with a wall thickness of 0.5 μm.

[0069] After centrifugal cleaning, disperse in an acrylic resin solution (solid content 25%) to make a liquid crystal microcapsule slurry.

[0070] Step 2: Transfer film lamination process

[0071] Pretreatment of transfer substrate 10: The PET film is plasma cleaned (power 200 W, time 30 s) to improve surface adhesion.

[0072] Coating of transfer structure layer 11: Print ITO ink onto the substrate surface using a gravure printing press and cure it by baking at 80 °C for 10 minutes.

[0073] Coating of color-changing layer: Coat the liquid crystal microcapsule slurry onto the ITO layer using a slot coating process, with a wet film thickness of 50 μm, and form a 20-μm color-changing layer after drying at 60 °C.

[0074] Coating of protective layer 13: Roll coat a UV-curable coating with a thickness of 10 μm and cure it through a mercury lamp (energy 800 mJ / cm 2 )

[0075] Coating of peelable adhesive layer 14: Coat a water-based acrylic adhesive using a doctor blade coater with a thickness of 15 μm, and wind it up after drying at 80 °C.

[0076] Apply an adhesive on the transfer substrate 10, and sequentially bond the transfer structure layer 11, the color-changing layer 12 containing liquid crystal microcapsules, the protective layer 13, and the peelable adhesive layer 14 together.

[0077] Refer to Figure 12 As shown, it is a flowchart of a method for preparing a color-changing transfer film for automotive interiors. The method for preparing a color-changing transfer film for automotive interiors is as follows:

[0078] S1. Preparation operation: First, prepare the materials for preparing the color-changing transfer film and select the required adhesive.

[0079] S2. Adhesion operation: Apply an adhesive on the transfer substrate 10, and sequentially adhere the transfer structure layer 11, the color-changing layer 12 containing liquid crystal microcapsules, the protective layer 13, and the peelable adhesive layer 14 together.

[0080] S3. Drying and hot pressing: Place the coated substrate in a well-ventilated and dry place to allow it to dry thoroughly, and then perform hot pressing on the dried product.

[0081] S4. Cutting operation: The preliminarily transferred film after hot pressing is laid flat on the cutting workbench 2, and it is cut at equal intervals by a cutting mechanism. Subsequently, the differently shaped color-changing transfer films after cutting are collected in the same package.

[0082] In addition, the method for preparing the color-changing transfer film for automobile interior also involves a device for preparing the color-changing transfer film for automobile interior. Refer to Figure 1 As shown, the device 1 for preparing the color-changing transfer film for automobile interior includes a cutting workbench 2 and a longitudinal and transverse movement system 20 arranged on the cutting workbench 2. An installation bracket 4 is provided on the longitudinal and transverse movement system 20.

[0083] Refer to Figure 3 As shown, a tool changing unit 6 is provided on the cutting workbench 2. The tool changing unit 6 includes a tool changing chain 60, and guide frames 61 are arranged at equal intervals on the tool changing chain 60. Different-sized and differently shaped cutting tools 62 are respectively arranged on several guide frames 61.

[0084] A tool changing box 63 is installed on the cutting workbench 2 to protect the tool changing chain 60, the guide frames 61, and the cutting tools 62 through the tool changing box 63.

[0085] During specific implementation, the cutting workbench 2 of the device 1 for preparing the color-changing transfer film for automobile interior in this application is mainly used for placing the color-changing transfer film 1 for automobile interior. Just lay the color-changing transfer film 1 for automobile interior flat on the cutting workbench 2.

[0086] The longitudinal and transverse movement system 20 is a known structure. The longitudinal and transverse movement system 20 can control the installation bracket 4 to move along the length and width directions of the cutting workbench 2, and can also control the installation bracket 4 to move in the height direction, so that the cutting tool 62 on the installation bracket 4 cuts the color-changing transfer film 1 for automobile interior laid flat on the cutting workbench 2, and divides it from a whole piece into multiple small-piece products.

[0087] It should be noted that the color-changing transfer film 1 for automobile interiors is mainly applied to the attachment of automobile interiors. However, the shapes and sizes of each interior block of the automobile interior are different. The existing cutting device only has a set of cutting tools 62 at its upper end, and a set of cutting tools 62 can only cut the color-changing transfer film 1 for automobile interiors with a single shape and size. Therefore, in order to improve the cutting efficiency of the color-changing transfer film 1 for automobile interiors, the present application proposes a tool-changing unit 6, and the tool-changing unit 6 can quickly realize the switching of the cutting tools 62 on the mounting bracket 4 through automation.

[0088] Refer to Figure 3 、 Figure 4 and Figure 5 As shown, specifically, the tool-changing unit 6 further includes a lifting plate 64 slidably mounted along the height direction on the guide frame 61. One side of the lifting plate 64 is provided with a fixed magnetic suction block 65, and a passive magnetic suction block 66 is adsorbed on the fixed magnetic suction block 65. The passive magnetic suction block 66 is mounted on a horizontal plate 67, and the bottom of the horizontal plate 67 is connected to the cutting tool 62.

[0089] A return spring 68 is provided between the lifting plate 64 and the guide frame 61.

[0090] In the initial state, the fixed magnetic suction block 65 and the passive magnetic suction block 66 are adsorbed together, and an energized coil for generating magnetism when energized is provided on the fixed magnetic suction block 65 and the passive magnetic suction block 66. When the two are de-energized, the two lose magnetism and cannot be adsorbed, which can facilitate the adsorption of the horizontal plate 67 and the cutting tool 62 at the bottom of the horizontal plate 67.

[0091] In the initial state, the lifting plate 64 is arranged at the top of the guide frame 61 through the return spring 68, and the cutting tool 62 is adsorbed on the fixed magnetic suction block 65 on the lifting plate 64.

[0092] A number of groups of guide frames 61 are equidistantly arranged on the tool-changing chain 60 in the tool-changing box 63, and a plurality of cutting tools 62 with different sizes and shapes are adsorbed on the lifting plates 64 of the plurality of guide frames 61.

[0093] When the cutting tool 62 needs to be replaced, the motor is started, and the motor drives the tool-changing chain 60 to rotate until the required cutting tool 62 on the tool-changing chain 60 moves to the specified position, and the required cutting tool 62 is located at the blanking port 70 of the tool-changing box 63 at this time.

[0094] Refer to Figure 6 and Figure 7 As shown, a support plate 40 for supporting the cutting tool 62 is connected to the mounting bracket 4, and two groups of symmetric limiting posts 41 are connected to the support plate 40. A limiting hole 42 for inserting and mounting the limiting posts 41 is provided on the horizontal plate 67 of the cutting tool 62.

[0095] A limiting plate 43 is also horizontally slidably mounted on the mounting bracket 4, and a limiting slot 44 for abutting and limiting the limiting post 41 is formed on the limiting plate 43.

[0096] The tool 62 is mounted at the bottom of the horizontal plate 67 by a clamping method; it should be noted that the limiting hole 42 and the limiting post 41 cooperate with each other, and a chamfer is provided on one side of the limiting hole 42 close to the limiting post 41, so that the limiting post 41 can be quickly inserted into the limiting hole 42 of the horizontal plate 67 after a certain range.

[0097] Look back Figure 3 and Figure 4 As shown, it is a schematic diagram of the main structure for controlling the switching of the tool 62 in this application; a switching electric push rod 7 is mounted on the tool changing box 63, and the output end of the switching electric push rod 7 passes through the tool changing box 63 downward and abuts against the top end of the lifting plate 64 movably, and a blanking port 70 for blanking the tool 62 is opened at the bottom of the tool changing box 63.

[0098] During specific implementation, the motor on the tool changing chain 60 is started, so that the guide frame 61 of the specified tool 62 on the tool changing chain 60 moves to directly above the blanking port 70 in the tool changing box 63. At this time, the switching electric push rod 7 is started, and the output end of the switching electric push rod 7 starts to move downward. At this time, the output end of the switching electric push rod 7 extends downward, and the output end of the switching electric push rod 7 presses down on the lifting plate 64, and the lifting plate 64 moves downward along the guide frame 61. At this time, the lifting plate 64 and the tool 62 at the bottom will pass through the tool changing box 63 and approach the mounting bracket 4.

[0099] After the limiting hole 42 on the horizontal plate 67 of the tool 62 is inserted onto the limiting post 41 on the support plate 40, the tool 62 and the horizontal plate 67 stop moving. Next, the passive magnetic attraction block 66 and the fixed magnetic attraction block 65 are powered off and lose the magnetic attraction force, and then the switching electric push rod 7 contracts to the initial state.

[0100] Meanwhile, after the switching electric push rod 7 contracts to the initial state, the lifting plate 64 on the guide frame 61 automatically moves to the topmost end of the guide frame 61 under the action of the reset tension spring 68, and the tool 62 is inserted into the limiting post 41 on the support plate 40.

[0101] When the horizontal plate 67 of the tool 62 is inserted into the limiting post 41, the tool 62 completes the preliminary positioning. However, at this time, the stability of the tool 62 is still poor. Therefore, in order to ensure the stability of the tool 62, further positioning and fixing of the tool 62 are required, as shown below.

[0102] Refer to Figure 7As shown in the figure, specifically, a vertical plate 5 is further installed on the cutting workbench 2. A control member 8 for controlling the telescoping of the support plate 40 is provided on the vertical plate 5. The control member 8 includes a control rack 80 installed on the vertical plate 5. Two symmetrical control gears 81 are rotatably connected to the mounting bracket 4. A synchronous gear 83 is also provided on the mounting bracket 4. A synchronous belt 84 is provided between the control gear 81 near the bottom of the mounting bracket 4 and the synchronous gear 83. An intermediate slot 82 is opened in the middle of the limiting plate 43 for the control gear 81 to rotate. The synchronous gear 83 is movably engaged with the control rack 80.

[0103] When the mounting bracket 4 approaches the tool changing box 63, the synchronous gear 83 on the mounting bracket 4 meshes with the control rack 80. After the mounting bracket 4 moves away from the tool changing box 63, the synchronous gear 83 on the mounting bracket 4 separates from the control rack 80.

[0104] During specific implementation, when the switched tool 62 is inserted into the limit post 41 on the support plate 40 through the limit hole 42 on the horizontal plate 67, the vertical and horizontal movement system 20 is started, and the vertical and horizontal movement system 20 drives the mounting bracket 4 and the tool 62 that has completed the switching on the mounting bracket 4 to move away from the tool changing box 63. At this time, the control gear 81 rotates clockwise, and the limiting plate 43 on the mounting bracket 4 will approach the horizontal plate 67 until the limiting card slot 44 on the limiting plate 43 can abut against the limit post 41, and the limiting plate 43 is located above the horizontal plate 67, so that the horizontal plate 67 is located between the support plate 40 and the limiting plate 43.

[0105] First, the horizontal plate 67 is initially limited by the limit post 41, and then the horizontal plate 67 can be clamped through the cooperation of the support plate 40 and the limiting plate 43. This greatly improves the connection stability of the horizontal plate 67, the tool 62 and the mounting bracket 4, and ensures that the tool 62 will not shake in the left - right and up - down directions during subsequent cutting.

[0106] When a tool change is required, the mounting bracket 4 is controlled to move towards the tool changing box 63. During this process, the rotating control gear 81 on the mounting bracket 4 will mesh with the control rack 80. At this time, the control rack 80 will drive the control gear 81 to rotate. When the control gear 81 rotates, it will drive the limiting plate 43 to move into the mounting bracket 4 until the limiting card slot 44 of the limiting plate 43 separates from the limit post 41, and at this time the limiting plate 43 no longer abuts against the horizontal plate 67, and the horizontal plate 67 and the tool 62 installed on the limit post 41 can be separated.

[0107] Refer to Figure 8 and Figure 9As shown, it should be noted that the lifting plate 64 moves along the guide frame 61, so the stability of the movement of the lifting plate 64 is relatively good. However, the horizontal plate 67 and the cutting tool 62 connected to the lifting plate 64 through the fixed magnetic attraction block 65 and the passive magnetic attraction block 66 cannot guarantee stability. When the horizontal plate 67 moves up and down with the lifting plate 64, it will rotate. Therefore, in order to ensure the stability of the horizontal plate 67 during the lifting process, the present application proposes a guiding component 9. The guiding component 9 is also provided on the vertical plate 5. The guiding component 9 includes a U-shaped frame 90 slidably penetrating through the vertical plate 5, and a U-shaped groove 91 for the U-shaped frame 90 to penetrate is opened on the vertical plate 5.

[0108] A first linkage rack 92 is installed on the U-shaped frame 90. A linkage gear 93 that rotates on the vertical plate 5 through a bracket is engaged with the first linkage rack 92. A second linkage rack 94 that slidably penetrates through the vertical plate 5 and abuts against the mounting bracket 4 is engaged with the linkage gear 93. A linkage compression spring 95 is installed between the first linkage rack 92 and the vertical plate 5.

[0109] During specific implementation, when the vertical and horizontal movement system 20 moves towards the vertical plate 5, the mounting bracket 4 on the vertical and horizontal movement system 20 squeezes the second linkage rack 94. After the second linkage rack 94 is subjected to pressure, it controls the second linkage rack 94 to move outwards. When the second linkage rack 94 moves, it controls the first linkage rack 92 to drive the U-shaped frame 90 to move inwards through the linkage gear 93 until a part of the U-shaped frame 90 passes through the vertical plate 5, forming a channel for the horizontal plate 67 to move, ensuring that the horizontal plate 67 moves up and down along the channel formed by the protrusion of the U-shaped frame 90, thereby effectively avoiding the deviation of the horizontal plate 67 during the lifting process.

[0110] Embodiment 2: On the basis of Embodiment 1, in order to further ensure the quality and integrity of the cutting of the automotive interior color-changing transfer film 1, the present application proposes a cleaning component 3. Refer to Figure 10 and Figure 11 As shown, the cleaning component 3 includes a cleaning frame 30 hinged on the vertical plate 5. An activity groove 31 for the cleaning frame 30 to open and close is also opened on the vertical plate 5. A cleaning frame 32 is also horizontally slidable on the vertical plate 5. A number of cleaning brushes 33 are rotatably arranged on the cleaning frame 32.

[0111] A V-shaped link 34 is also installed at the hinge of the cleaning frame 30.

[0112] In the initial state, the cleaning frame 30 is inclined, and the cleaning frame 32 expands towards the side of the vertical plate 5 close to the tool changing frame.

[0113] During specific implementation, the cutting electric push rod drives the lifting plate 64 and the cutting tool 62 magnetically attracted to its lower end to move downward. After the cutting tool 62 moves to the upper end of the cleaning frame 32, the cleaning brush 33 is activated. The cleaning brush 33 cleans the cutting end at the bottom of the cutting tool 62, removing the adhered impurities on the cutting end. The removed impurities then fall into the cleaning box 30 and slide to the outside along the inclined surface of the cleaning box 30.

[0114] During operation: In the first step, first lay the automotive interior color-changing transfer film 1 flat on the cutting workbench 2 and make it in a flat state. Then start the longitudinal and transverse movement system 20. The longitudinal and transverse movement system 20 controls the mounting bracket 4 at its upper end and the cutting tool 62 on the mounting bracket 4 to move above the automotive interior color-changing transfer film 1. After the cutting tool 62 moves to the designated position, the cutting tool 62 presses down and cuts the automotive interior color-changing transfer film 1.

[0115] In the second step: When it is necessary to replace the cutting tool 62 with a different shape after the first cutting tool 62 cuts, the longitudinal and transverse movement system 20 drives the mounting bracket 4 and the cutting tool 62 at its upper end to move to one side of the vertical plate 5 until the longitudinal and transverse movement system 20 moves directly below the tool changing box 63. Subsequently, the switching electric push rod 7 is activated, driving the lifting plate 64 downward to adsorb the first cutting tool 62 and retracting it into the switching box.

[0116] In the third step: Then start the motor on the tool changing chain 60. The tool changing chain 60 rotates until the required cutting tool 62 on the tool changing chain 60 moves directly above the material discharge port 70 of the tool changing box 63.

[0117] In the fourth step: The switching electric push rod 7 is activated. The output end of the switching electric push rod 7 starts to move downward. At this time, the output end of the switching electric push rod 7 extends downward. The output end of the switching electric push rod 7 presses down on the lifting plate 64, and the lifting plate 64 moves downward along the guiding frame 61. At this time, the lifting plate 64 and the cutting tool 62 at the bottom will pass through the tool changing box 63 and approach the mounting bracket 4.

[0118] In the fifth step: During this process, the output end of the switching electric push rod 7 pauses for a moment, and the cleaning brush 33 is activated. The cleaning brush 33 cleans the cutting end at the bottom of the cutting tool 62, removing the adhered impurities on the cutting end. The removed impurities then fall into the cleaning box 30 and slide to the outside along the inclined surface of the cleaning box 30.

[0119] In the sixth step: Subsequently, the output end of the switching electric push rod 7 continues to move downward until the new cutting tool 62 is inserted onto the limiting post 41 on the support plate 40. Then the limiting plate 43 abuts against the top of the limiting post 41, and the horizontal plate 67 on the cutting tool 62 is limited by the limiting plate 43 and the support plate 40, finally completing the replacement of the cutting tool 62.

[0120] Step 7: Subsequently, repeat the above operations to cut the color-changeable transfer film 1 for automotive interiors.

[0121] The embodiments of this specific implementation manner are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A color-changing transfer film for automotive interiors, characterized in that: It includes a transfer substrate (10), a transfer structure layer (11), a color-changing layer (12) containing liquid crystal microcapsules, a protective layer (13), and a peelable adhesive layer (14) arranged successively from bottom to top; The color-changing layer (12) containing liquid crystal microcapsules is composed of two parts: a wall material and a core material, and the core material is a liquid crystal material.

2. A preparation method of a color-changeable transfer film for automobile interior trim, using the color-changeable transfer film for automobile interior trim described in Claim 1, characterized in that: A method for preparing a color-changing transfer film for automobile interior is as follows: S1. Preparation operation: First, prepare the materials for preparing the color-changing transfer film and select the required adhesive; S2. Adhesion operation: Coat the adhesive on the transfer substrate (10), and successively adhere the transfer structure layer (11), the color-changing layer (12) containing liquid crystal microcapsules, the protective layer (13), and the peelable adhesive layer (14) together; S3. Drying and hot pressing: Place the coated transfer substrate (10) in a ventilated and dry place to make it fully dry, and perform hot pressing on the dried product; S4. Cutting operation: The hot-pressed transfer substrate (10) is laid flat on the cutting workbench (2), and it is cut at equal intervals by a cutter (62), and then the color-changing transfer films of different shapes presented after cutting are collected in the same package; In addition, the method for preparing a color-changing transfer film for automobile interior also relates to a device for preparing a color-changing transfer film for automobile interior. The device for preparing a color-changing transfer film for automobile interior includes a cutting workbench (2) and a vertical and horizontal movement system (20) arranged on the cutting workbench (2), and an installation bracket (4) is provided on the vertical and horizontal movement system (20); A tool changing unit (6) is provided on the cutting workbench (2). The tool changing unit (6) includes a tool changing chain (60), and guide frames (61) are arranged at equal intervals on the tool changing chain (60), and cutters (62) with different sizes and shapes are respectively arranged on several guide frames (61); A tool changing box (63) is installed on the cutting workbench (2), and the tool changing chain, the guide frame (61), and the cutter (62) are protected by the tool changing box (63).

3. A method for preparing a color-changing transfer film for automobile interior according to claim 2, characterized in that: The tool changing unit (6) further includes a lifting plate (64) slidably installed along the height direction on the guide frame (61). A fixed magnetic attraction block (65) is installed on one side of the lifting plate (64), and a passive magnetic attraction block (66) is adsorbed on the fixed magnetic attraction block (65). The passive magnetic attraction block (66) is installed on a horizontal plate (67), and the bottom of the horizontal plate (67) is connected to the cutter (62); A reset tension spring (68) is provided between the lifting plate (64) and the guide frame (61).

4. A method for preparing a color-changeable transfer film for automobile interior according to claim 2, characterized in that: A switching electric push rod (7) is installed on the tool changing box (63). The output end of the switching electric push rod (7) passes through the tool changing box (63) downward and abuts against the top end of the lifting plate (64). A material discharging port (70) for discharging the cutter (62) is opened at the bottom of the tool changing box (63).

5. A method for preparing a color-changeable transfer film for automotive interior, according to claim 2, characterized in that: A support plate (40) for supporting the cutter (62) is connected to the installation bracket (4). Two groups of symmetric limiting columns (41) are connected to the support plate (40), and limiting holes (42) for inserting and installing the limiting columns (41) are opened on the horizontal plate (67) of the cutter (62); A limiting plate (43) is also slidably mounted on the mounting bracket (4), and a limiting slot (44) for limiting the limiting column (41) is formed on the limiting plate (43).

6. A method for preparing a color-changing transfer film for automobile interior according to claim 2, characterized in that: A vertical plate (5) is also mounted on the cutting workbench (2). A control member (8) for controlling the expansion and contraction of the limiting plate (43) is provided on the vertical plate (5). The control member (8) includes a control rack (80) mounted on the vertical plate (5). Two control gears (81) are rotatably connected in the height direction of the mounting bracket (4). A synchronous gear (83) is also provided on the mounting bracket (4). A synchronous belt (84) is provided between the control gear (81) near the bottom of the mounting bracket (4) and the synchronous gear (83). An intermediate slot (82) is formed in the middle of the limiting plate (43) for the control gear (81) to rotate. The synchronous gear (83) is movably engaged with the control rack (80).

7. A method for preparing a color-changing transfer film for automotive interiors according to claim 6, characterized in that: A guiding member (9) is also provided on the vertical plate (5). The guiding member (9) includes a U-shaped frame (90) slidably penetrating through the vertical plate (5), and a U-shaped groove (91) for the U-shaped frame (90) to penetrate through is formed on the vertical plate (5). A first linkage rack (92) is mounted on the U-shaped frame (90). A linkage gear (93) rotatably mounted on the vertical plate (5) through a bracket is engaged with the first linkage rack (92). A second linkage rack (94) slidably penetrating through the vertical plate (5) and abutting against the mounting bracket (4) is engaged with the linkage gear (93). A linkage compression spring (95) is mounted between the first linkage rack (92) and the vertical plate (5).

8. A method for preparing a color-changing transfer film for automotive interior, according to claim 6, characterized in that: A cleaning member (3) is also arranged on the vertical plate (5). The cleaning member (3) includes a cleaning frame (30) hinged on the vertical plate (5). An activity slot (31) for the cleaning frame (30) to open and close is also formed on the vertical plate (5). A cleaning rack (32) horizontally slides on the vertical plate (5). A plurality of cleaning brushes (33) are rotatably arranged on the cleaning rack (32).

9. A method for preparing a color-changeable transfer film for automotive interior, according to claim 8, characterized in that: A V-shaped connecting rod (34) is also mounted at the hinge of the cleaning frame (30).

10. A method for preparing a color-changing transfer film for automobile interiors according to claim 8, characterized in that: An opening and closing gear (36) is also provided at the hinge of the cleaning frame (30). An opening and closing plate (35) is mounted on the lifting plate (64). Part of a sawtooth structure is provided on the opening and closing plate (35). The sawtooth structure on the opening and closing plate (35) is movably engaged with the opening and closing gear (36).

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