OMD surface decoration process and production equipment

Abstract

The invention discloses an OMD surface decoration process and special equipment thereof, and aims to solve the problems of low film laminating precision, bubble residue, poor bonding firmness and the like in the prior art. The process comprises the following six steps: preparing a texture membrane, drying the membrane, spraying primer, performing vacuum lamination, reinforcing an oven and tearing off the membrane. Wherein the texture membrane is made of a multi-layer laminated structure, and the laminated structure comprises an embossing layer, a toning ink layer, a binder layer and the like. The special laminating equipment adopts a vacuum bin and high-pressure bin integrated structure, and comprises a bin body base, a bin body cover plate, a hydraulic press and a movable column. A vacuum machine is arranged in the bin body base, so that a high-vacuum environment is formed to eliminate bubbles in the laminating process; an infrared LED lamp is used for precise irradiation, a film texture layer and a binding agent are softened, meanwhile, high-pressure gas of the upper mold is used for forward blowing profiling, and a hydraulic press drives a profiling silica gel mold to be pressed. By means of the temperature control design of the low temperature of the upper mold and the constant temperature of the lower mold, high-precision fitting of the texture membrane and the 3D product is finally achieved in the mode that high-pressure gas and 3D profiling silica gel are synchronously shaped.

Description

Technical Field

[0001] The present invention belongs to the technical field of comprehensive process expansion for 3D surface decoration of fiber materials or metals, etc., and specifically relates to an OMD surface decoration process and production equipment. Background Art

[0002] With the development trend of consumer electronics products such as 3C electronic products and laptop computers, the market's demand for the appearance effect of products is increasing day by day. It not only requires products to have unique visual effects and high-quality decorative performance, but also puts forward higher requirements for production efficiency and manufacturing cost. Facing the rapidly updated 3C industry, low-cost and high-efficiency production processes have become the core demands of the industry. However, while meeting these demands, as a key fiber material, its surface decoration technology still has certain technical bottlenecks in terms of process adaptability, visual expressiveness, and expansion of application scenarios. To address this issue and solve the limitations of existing surface decoration processes while meeting diverse market demands, an OMD surface decoration process and supporting production equipment are proposed. This process combines advanced multi-layer film processing technology, precise lamination technology, and intelligent production processes, aiming to meet the needs of the 3C industry with higher process adaptability, lower cost investment, and better decorative effects, comprehensively improving the application scope and technical level of fiber material surface decoration, and helping the industry achieve new breakthroughs.

[0003] After retrieval, as disclosed in a Chinese patent document, a method for high-pressure lamination of a two-color injection molded cup holder roller blind based on the OMD process [Application No.: 202410430765.2, Publication No.: CN118181798A], in the TOM process, the TOM film is directly laminated on the cup holder roller blind, and in the OMR process, the ink of the OMR film is transferred to the outer surface of the soft glue layer. After tearing off the OMR film, the transferred product is cured, and the cup holder roller blind after transfer is obtained after curing. Although this invention can achieve the OMD decorative effect, the steps are complex and the structure is very single. It not only fails to achieve the decorative effect of the present invention but also does not have the characteristics of batch production of the present invention. Summary of the Invention

[0004] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide an OMD surface decoration process and production equipment.

[0005] An OMD surface decoration process and production equipment, characterized in that: It includes the following steps: Step 1: Prepare an OMD texture film. Its laminated distribution from top to bottom is as follows: an ABS base film, an embossed A glue release layer, an embossed B glue texture layer, a screen-printed logo, a screen-printed color-adjusting ink layer, a coated bottom ink layer, and a screen-printed adhesive layer, obtaining a laminate one; Step 2: Dry Layer 1, with the drying temperature set at 70°C; Step 3: Spray a primer on the surface of the 3D product to obtain Layer 2; Step 4: Place Layer 1 and Layer 2 into the OMD special bonding cavity in sequence. Under vacuum conditions, soften Layer 1 through an infrared LED lamp, and use the form of combining a profiling silicone mold and positive pressure to attach Layer 1 to the product surface. After the binder is initially activated and cured to form effective adhesion, open the cavity and take out Product 1; Step 5: Tear off the ABS film from the initially activated product and put it into an oven for reinforcement to finally activate and cure the binder. The oven reinforcement temperature is 80°C and the time is 30 min; Step 6: Take out the product from the oven after reinforcement and transfer it to the next process.

[0006] Preferably, the OMD texture film processing method includes paint spraying processes such as screen printing, roll embossing, sheet embossing, and coating processes.

[0007] Through the above technical solutions, precise fitting of the OMD texture film on the surface of complex 3D products and high-quality decorative effects can be achieved, while ensuring the high efficiency of the production process and the consistency of the product appearance. The organic combination of different processing methods enables the texture film to not only meet the decorative needs of flat products but also adapt to the surfaces of products with multiple curved surfaces or special shapes. In addition, the optimized screen printing and embossing processes can significantly enhance the texture detail expression of the film, and the coating and spraying processes further enhance the functionality and aesthetics of the film. This technology has greatly expanded the application scenarios of the OMD texture film, which is not only applicable to 3C electronic products and laptop fields but also covers various industries such as automotive interiors, household appliances, and high-end furniture, providing a new solution for the wide application of fiber-based raw materials in the surface decoration field.

[0008] Preferably, the primer material is a PU treatment agent.

[0009] Through the above technical solutions, the PU primer can also maintain stable performance during subsequent drying and fitting processes, without sagging or delaminating due to temperature changes, ensuring the efficient fitting of subsequent Layer 1 and Layer 2. At the same time, the flat layer formed by the PU primer on the product surface can significantly improve the fitting accuracy of the OMD texture film, reducing decorative defects caused by surface unevenness. In addition, selecting the PU treatment agent as the primer material can also adapt to various types of 3D product surface materials, including plastics, metals, and composite materials, further expanding the application scope of the OMD surface decoration process. Through the selection and optimization of the varnish, the entire process not only improves the decorative effect but also effectively reduces the rework rate and material loss, thereby achieving double optimization of production capacity and cost.

[0010] Preferably, the upper mold in the fitting cavity is made of profiling silica gel, and its shape matches the surface of the 3D product.

[0011] Through the above technical solution, the flexibility of the profiling silica gel upper mold not only ensures the surface integrity of the product during the fitting process, but also can further optimize the fitting effect of the OMD texture film by adjusting the pressure and temperature conditions of the upper mold. In addition, the upper mold can maintain a stable shape during long-term production use, avoiding deformation caused by multiple uses, thereby ensuring the consistency of the fitting quality. The preferred profiling silica gel upper mold can also be modularly designed according to the needs of different products, and adapt to the production requirements of multiple varieties by quickly replacing upper molds with different shapes. This flexibility further enhances the adaptability of the OMD surface decoration process, meets the needs of rapid iteration in the modern manufacturing industry, and provides a more efficient and reliable solution for complex surface decoration.

[0012] Preferably, when the upper mold temperature is maintained in a low-temperature fitting state to ensure the rigidity of the film, the lower mold is heated at a constant temperature to activate the adhesive, so as to ensure the appearance effect; The conditions for the upper mold to maintain a low-temperature fitting state are as follows: 1. The substrate of the texture film uses ABS material, which can ensure profiling fitting at a temperature of 80 °C; 2. The upper mold uses soft silica gel material to ensure the stability of the fitting state; 3. The infrared LED lamp for heating the upper mold maintains the temperature of the upper mold including silica gel by controlling the wavelength of the light irradiation. The conditions for the lower mold to be heated at a constant temperature for fitting are as follows: 1. To ensure the appearance conditions, a thermosetting low-temperature fitting adhesive needs to be used; 2. When applied to current fiberglass products, considering that the fiberglass softens after being heated at high temperature and affects the appearance effect, the heating temperature should be controlled within 85 °C.

[0013] Through the above technical solution, the temperature control of the upper mold and the lower mold realizes the double guarantee of the appearance effect and the bonding performance during the film fitting process. Keeping the upper mold in a low-temperature state can effectively prevent the film from losing rigidity due to overheating during the fitting process, ensuring the integrity of the texture structure and the flatness of the product surface; at the same time, the constant-temperature heating of the lower mold can accurately activate the adhesive, forming a stable adhesion force between the film and the product surface, and ensuring the long-term stability of the decoration effect. By controlling the wavelength of the infrared LED light of the upper mold, the temperature of the upper mold can be accurately adjusted, avoiding the fitting defects caused by uneven temperature in the traditional heating method. The temperature of the lower mold is limited within 85 °C, which not only meets the activation requirements of the adhesive, but also effectively avoids the problem of softening and deformation of the fiberglass material due to high-temperature heating, thereby improving the process adaptability and the finished product rate. In addition, this temperature control scheme can also adapt to the surface fitting needs of products with different materials. By flexibly adjusting the temperature parameters, it further broadens the application range of the OMD surface decoration process and provides more reliable technical support for the surface decoration of high-complexity 3D products.

[0014] Preferably, the wavelength of the infrared LED lamp is set to 800nm - 1200nm to precisely control the temperature of the upper mold, ensuring the softening of the surface of the texture film while avoiding excessive thermal deformation.

[0015] Through the above technical solution, the wavelength of the infrared LED lamp is controlled within the range of 800nm - 1200nm, enabling precise regulation of the temperature of the upper mold, achieving the best softening state of the texture film during the lamination process, and avoiding film thermal deformation or texture damage caused by overheating. This precise temperature control ensures the stability of the lamination process, improves the decorative effect and quality consistency of the product surface. Through the optimization of the wavelength range, not only can the efficiency of film softening and product surface lamination be improved, but also process defects such as bubbles and edge warping caused by excessive temperature can be effectively reduced. In addition, reasonable wavelength control can also reduce energy consumption, enhancing the environmental friendliness and economic efficiency of the production process. This solution further strengthens the application ability of the OMD surface decoration process in high-precision and high-demand products, providing strong technical support for achieving high-quality decoration of complex curved surface products.

[0016] Preferably, the binder in the oven reinforcement step is a two-component epoxy thermosetting binder, and its pencil hardness is about 3H after final curing.

[0017] Through the above technical solution, by using a two-component epoxy thermosetting binder and completing the volatilization of the diluent before lamination, not only the emission of harmful gases is reduced in the oven reinforcement step, meeting the requirements of environmentally friendly production, but also a hardness of 3H can be provided after final curing, ensuring the firm bonding of the texture film to the product surface, thus significantly improving the durability and appearance quality of the product. The high adhesion strength of the binder after final curing can also meet the requirements of surface decoration of different materials, with stronger adaptability, especially suitable for products with complex 3D surfaces and high performance requirements.

[0018] Preferably, the OMD special lamination equipment is equipped with a vacuum system, and the vacuum degree can reach the range of -0.09MPa to -0.1MPa.

[0019] Through the above technical solution, the vacuum system built in the OMD special laminating equipment can be flexibly adjusted within the vacuum range, thus effectively eliminating the bubble problems that may occur during the laminating process, ensuring the perfect lamination of the texture film and the product surface, and improving the uniformity and quality stability of lamination. The adjustable range of the vacuum degree provides more flexible process adaptability for product surfaces of different materials and complexities. Laminating in a vacuum environment can also reduce the influence of external environmental factors on the lamination effect, thus significantly enhancing the visual expressiveness of the product surface and the restoration degree of texture details. At the same time, the vacuum system can adapt to a variety of product types, including 3D surfaces or multi-curved surface products with high complexity, further expanding the application scenarios of the OMD surface decoration process.

[0020] Preferably, the special laminating cavity includes a vacuum chamber base, a vacuum chamber cover plate, a hydraulic device and a movable column. A window is provided on the side of the vacuum chamber base, a vacuum machine is provided at the bottom of the vacuum chamber base, a bottom cavity is provided inside the vacuum chamber base, the vacuum chamber cover plate is arranged directly above the vacuum chamber base, and the vacuum chamber cover plate and the vacuum chamber base can form a sealed space. A top cavity is provided at the bottom of the vacuum chamber cover plate, the hydraulic device is arranged on the top of the vacuum chamber cover plate, the hydraulic device can drive the vacuum chamber cover plate to move, and the vacuum chamber cover plate is movably installed on the movable column.

[0021] Through the above technical solution, the special laminating cavity combines the vacuum machine with the sealed structure of the vacuum chamber base and the vacuum chamber cover plate to create a high-vacuum environment. The achievable vacuum degree ranges from -0.09 MPa to -0.1 MPa, effectively removing air and bubble residues and ensuring a high-quality and flawless effect when the texture film is laminated to the product surface. At the same time, the window is used to introduce infrared LED light irradiation to uniformly soften the texture layer of the film and fully activate the adhesive through precise wavelength control, avoiding excessive thermal deformation and ensuring tight lamination. The hydraulic device is arranged on the top of the vacuum chamber cover plate and can drive the vacuum chamber cover plate to move up and down to achieve uniform pressure distribution during the dynamic lamination process. The design of the top cavity and the bottom cavity can accommodate the profiling silicone mold. Through the temperature control cooperation of the upper and lower molds, the upper mold maintains the rigid state of the texture film at a low temperature, and the lower mold activates the adhesive at a constant temperature to meet the high-precision lamination requirements of complex 3D surfaces or irregular shapes. In addition, the hydraulic drive and modular design of the laminating cavity greatly improve the adaptability and operation efficiency of the equipment, can flexibly adapt to products of various materials and shapes, ensure high efficiency and stability in batch production, and provide high-reliability and precision equipment support for the OMD decoration process.

[0022] Compared with the prior art, the present invention has the following advantages: 1. The OMD surface decoration process and production equipment simplify the lamination steps between the texture film and the product surface by optimizing the OMD special lamination equipment and infrared LED temperature control technology, reducing the complex multiple processes in the traditional process. The temperature control technology of the upper and lower molds makes the lamination process more efficient and accurate. At the same time, the integrated design of the oven reinforcement and the vacuum system further improves the production efficiency. Through the integrated process flow, the dependence on labor and complex equipment is reduced, making large-scale mass production possible and effectively reducing the production cost.

[0023] 2. The OMD surface decoration process ensures the uniformity of the film thickness by optimizing the processing technology and lamination process of the texture film, making the laminated texture layer smoother and more beautiful. Especially the adoption of low-temperature lamination and thermosetting environmental protection adhesive process eliminates the need for multiple UV ultraviolet lamp curing, avoiding the aging problems caused by high temperature or ultraviolet light curing in the traditional process and improving the durability of the product.

[0024] 3. The combination of the profiling silicone upper mold and the infrared LED temperature control technology in the OMD surface decoration process ensures that the OMD texture film can adapt to a variety of complex 3D surface morphologies. The introduction of the vacuum system further improves the accuracy of the lamination process, enabling high-quality lamination on substrates such as glass fiber, metal, and plastic. Especially in the fields of 3C electronic products, automotive interiors, etc., in the face of diverse curved surface modeling requirements, the process optimization of the present invention makes it possible to achieve high-precision decoration of complex shapes, broadening the practical application scope of OMD surface decoration. Brief Description of the Drawings

[0025] Figure 1 is the schematic flow chart of the present invention; Figure 2 is the three-dimensional view of the special lamination cavity of the present invention; Figure 3 is the front view of the special lamination cavity of the present invention; Figure 4 is the schematic working process diagram of the special lamination cavity of the present invention.

[0026] In the figure: 101, vacuum chamber base; 102, vacuum chamber cover; 103, hydraulic device; 104, movable column; 105, window; 106, vacuum machine; 201, bottom cavity; 202, top cavity. Detailed Description of the Embodiment

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] Please refer to Figures 1 to 4 , the present invention provides a technical solution: a large-diameter electric melting ring and its application method; Specifically: Example 1: OMD surface decoration process for 3D plastic housing Step 1: Preparation of OMD texture film Through screen printing technology, a laminate is sequentially formed on the ABS base film: an embossed A glue release layer, an embossed B glue texture layer, a screen-printed Logo layer, a screen-printed color-matching ink layer, a coated bottom ink layer, and a screen-printed adhesive layer to obtain Laminate 1. The texture layer of the film is processed with a flexible material to adapt to the surface fitting requirements of the 3D plastic housing.

[0029] Step 2: Drying of the texture film Put Laminate 1 into a drying device, set the temperature to 70 °C and the time to 20 minutes to ensure that the laminate is dry and has good flexibility, suitable for fitting complex 3D curved surfaces.

[0030] Step 3: Primer spraying Evenly spray PU primer on the surface of the 3D plastic housing to form Laminate 2. After spraying, it is oven-reinforced until completely dry to ensure that the surface of the primer is flat and has strong adhesion, capable of supporting the high-precision fitting of the film.

[0031] Step 4: Fitting in the OMD special fitting cavity Put Laminate 1 and Laminate 2 into the OMD special fitting cavity in sequence for fitting. The detailed steps are as follows: Vacuum environment formation: By starting the vacuum machine 106, adjust the vacuum degree to more than -0.98 MPa to ensure that a sealed vacuum space is formed in the fitting cavity.

[0032] Infrared LED lamp irradiation for softening: Infrared light irradiates into the cavity through the window 105, introduce infrared light with a wavelength of 900 nm, uniformly heat the texture film, soften the texture layer and activate the adhesive. For the plastic housing, the infrared wavelength and heating intensity are optimized to avoid material deformation due to high temperature.

[0033] Fitting operation: The hydraulic device 103 drives the vacuum chamber cover plate 102 to descend, and the profiling silicone mold in the top cavity 202 is completely fitted with the surface of the 3D plastic housing. The silicone mold has good flexibility, ensuring that the film can adapt to complex curved surfaces. At the same time, through the uniform action of the positive pressure, the precise fitting of the texture layer and the primer surface is realized.

[0034] Taking out the product: After the adhesive is initially cured, the hydraulic device 103 controls the vacuum chamber cover plate 102 to lift and take out Product 1.

[0035] Step 5: Oven reinforcement After removing the film from the product, place it in an oven. Set the heating temperature to 80 °C and the time to 30 minutes. During the oven strengthening process, the binder is completely cured, enhancing the adhesion strength between the texture layer and the plastic shell, thereby obtaining a 3D plastic shell with clear surface texture and perfect curved surface fitting.

[0036] Example 2: OMD surface decoration process for fiberglass products Step 1: Preparation of the OMD texture film Using screen printing technology, sequentially form a stack on the ABS base film: an embossed A glue release layer, an embossed B glue texture layer, a silk-screened Logo layer, a silk-screened color-matching ink layer, a coated bottom ink layer, and a silk-screened binder layer to obtain Stack 1. The texture film uses high-temperature resistant inks and binders to meet the higher heating requirements of fiberglass materials.

[0037] Step 2: Drying of the texture film Place Stack 1 in a drying device, set the temperature to 70 °C, and the time to 25 minutes to ensure that each layer of the film is dry and maintains physical stability.

[0038] Step 3: Primer spraying Evenly spray PU primer on the surface of the fiberglass product to form Stack 2. After spraying, strengthen in the oven until completely dry to ensure that the primer adheres evenly, providing a stable foundation for film lamination.

[0039] Step 4: Lamination in the OMD special lamination chamber Place Stack 1 and Stack 2 into the OMD special lamination chamber for lamination in sequence. The detailed steps are as follows: Formation of a vacuum environment: By starting the vacuum machine 106, adjust the vacuum degree to above -0.98 MPa to ensure that a high-vacuum environment is formed inside the lamination chamber, effectively removing air bubbles and preventing defects from occurring between the lamination layers.

[0040] Softening by infrared LED lamp irradiation: Infrared light irradiates into the chamber through window 105, introducing infrared light with a wavelength of 1000 nm to heat and soften the texture film, and at the same time activate the binder layer. The high-temperature resistance characteristics of the fiberglass product require slightly higher heating parameters to ensure that the film fits smoothly.

[0041] Lamination operation: The hydraulic device 103 drives the vacuum chamber cover plate 102 to descend, and the profiling silicone mold in the top cavity 202 fits completely with the fiberglass surface. The lower mold is heated at a constant temperature, with the temperature controlled within 90 °C, further activating the binder, and at the same time preventing the fiberglass product from softening and deforming due to overheating. The hardness of the profiling silicone mold is slightly higher than that of the plastic shell lamination mold to meet the strength requirements of the fiberglass surface.

[0042] Taking out the product: After the binder is initially cured, the hydraulic device 103 controls the vacuum chamber cover plate 102 to rise and takes out Product 1.

[0043] Step Five: Oven Reinforcement After removing the film from the product, place it in the oven. Set the heating temperature to 80 °C and the time to 30 minutes. During the oven reinforcement process, the binder is completely cured, enhancing the adhesion strength between the texture layer and the plastic shell, thereby obtaining a fiberglass product with a delicate surface texture and strong adhesion.

[0044] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0045] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0046] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An OMD surface decoration process and production equipment, characterized in that: The steps include: Step 1: prepare an OMD texture film, the stacking distribution of which is from top to bottom: base film layer, A glue release layer, B glue outer texture layer, C glue inner texture layer, logo layer, color matching ink layer, bottom cover ink layer, adhesive layer, to obtain stacking layer 1; Step 2: spray primer on the surface of the 3D product to obtain layer 2; Step 3: Soften the laminate 1 under vacuum conditions with an infrared LED lamp, attach the laminate 1 to the product surface using a contoured silicone mold combined with high-pressure gas pressure, and after the adhesive is initially activated and cured to form effective adhesion, open the cavity and take out the product 1; Step 4: Tear off the membrane of the initially activated product; Step 5: Place the product in an oven for final activation and curing of the adhesive. The oven temperature is 80°C for 30 minutes.

2. The OMD surface decoration process according to claim 1, characterized in that: The OMD texture film processing method includes screen printing, coil embossing, sheet embossing, coating process and other paint spraying processes.

3. The OMD surface decoration process according to claim 1, characterized in that: The primer material is PU treatment agent.

4. The OMD surface decoration process according to claim 1, characterized in that: The upper mold in the fitting cavity is made of contoured silicone, and the shape is matched with the surface of the 3D product after the shrinkage rate is reserved.

5. The OMD surface decoration process according to claim 1, characterized in that: The upper mold temperature is kept at a low temperature to ensure the rigidity of the diaphragm, while the lower mold is heated at a constant temperature to activate the adhesive to ensure the appearance effect; The conditions for the upper mold to maintain a low-temperature bonding state are as follows:

1. The textured diaphragm substrate is made of ABS material, which can ensure contour bonding at a temperature of 80°C; 2. The upper mold uses 3D contour silicone to ensure the stability of the bonding state; 3. The upper mold heating controls the irradiation of LED lights of a specific wavelength to ensure that the silicone is in a constant low-temperature state while achieving the effect of heating and softening the diaphragm; The conditions for the constant temperature heating and bonding state of the lower mold are as follows:

1. To ensure the appearance conditions, the adhesive must use a thermosetting low-temperature bonding adhesive; 2. When applied to current glass fiber products, considering that the glass fiber will soften at high temperatures and affect the appearance, the heating temperature should be controlled within 80°C.

6. The OMD surface decoration process according to claim 1, characterized in that: The wavelength of the infrared LED lamp is set to 930nm-940nm to accurately control the upper mold temperature, ensuring the softening of the textured diaphragm surface while avoiding excessive thermal deformation of the silicone.

7. The OMD surface decoration process according to claim 1, characterized in that: The adhesive in the oven reinforcement step is a two-component epoxy thermosetting adhesive, and its pencil hardness after final curing is about 3H.

8. The OMD surface decoration process according to claim 1, characterized in that: The OMD dedicated bonding equipment has a built-in vacuum system, and the vacuum degree can range from -0.09MPa to -0.1MPa.

9. The OMD surface decoration process according to claim 1, characterized in that: The special laminating chamber comprises a vacuum chamber base (101), a vacuum chamber cover plate (102), a hydraulic press (103) and a movable column (104); a window (105) is provided on the side of the vacuum chamber base (101); a vacuum machine (106) is provided at the bottom of the vacuum chamber base (101); a bottom cavity (201) is provided inside the vacuum chamber base (101); the vacuum chamber cover plate (102) is arranged directly above the vacuum chamber base (101); the vacuum chamber cover plate (102) and the vacuum chamber base (101) can form a closed space; a top cavity (202) is provided at the bottom of the vacuum chamber cover plate (102); the hydraulic press (103) is arranged on the top of the vacuum chamber cover plate (102); the hydraulic press (103) can drive the vacuum chamber cover plate (102) to move; and the vacuum chamber cover plate (102) is movably mounted on the movable column (104).

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