Air-cooled refrigerator front panel as well as preparation method and production equipment thereof

Abstract

The invention discloses an air-cooled refrigerator front panel and a preparation method and production equipment thereof, and relates to the technical field of air-cooled refrigerators.The device comprises a first unwinding assembly used for unwinding a base material plate, a second unwinding assembly used for unwinding a metal texture film and a third unwinding assembly used for unwinding a PET fingerprint-resistant film. The third unwinding assembly is specially used for introducing a PET fingerprint-resistant film, the surface of the PET fingerprint-resistant film is coated with glue through the second gluing assembly, and finally the PET fingerprint-resistant film is firmly compounded on a primary composite board formed by a base material and a metal texture film through the first gluing assembly and the first composite assembly through the second composite assembly. Through the excellent hydrophobic and oleophobic characteristics of the PET fingerprint-resistant film on the outermost layer, the panel is directly endowed with excellent fingerprint resistance and oil stain resistance, stains are very easy to clean, and the appearance is kept clean for a long time.

Description

Technical Field

[0001] This invention relates to the field of air-cooled refrigerator technology, and more specifically, to an air-cooled refrigerator front panel, its preparation method, and production equipment. Background Technology

[0002] As people's living standards improve, frost-free refrigerators are gradually replacing direct-cooling refrigerators as the mainstream due to their advantage of not requiring manual defrosting. The air duct assembly in the center of the back of the refrigerator compartment is key to ensuring the refrigeration function, and its front panel, as a component directly visible to users, significantly impacts the product's perceived quality.

[0003] Early duct front panels were mostly made of plastic, which had a plain appearance and failed to meet high-quality requirements. Therefore, the industry developed metal decorative panels, which are made by processing brushed aluminum alloy or stainless steel sheets into matching shapes and fixing them to the surface of plastic ducts with edge clips. The strong metallic texture enhances the product's grade and has gained market recognition. However, metal decorative panels have problems such as complex production processes and susceptibility to damage and deformation during transportation and assembly. Later, the market developed decorative panels that combine metallic film with plastic sheets. These composite panels do not require clips or molds for assembly, have strong versatility, and are structurally stable and not easily deformed, thus solving the shortcomings of metal decorative panels to some extent.

[0004] Nevertheless, current metallic-textured film-plastic composite decorative panels on the market still have key pain points that urgently need to be addressed: their surface resistance to fingerprints and oil stains is poor, making them prone to fingerprints and oil stains during daily use, and these stains are difficult to clean once they adhere. This problem not only affects the cleanliness of the panel's appearance in the long term, reducing the visual experience during product use, but may also accelerate the aging of the panel surface material due to long-term stain residue, shortening the actual lifespan of the panel, and thus restricting the further promotion and application of this type of composite decorative panel in the mid-to-high-end refrigerator market. Summary of the Invention

[0005] This invention provides a front panel for an air-cooled refrigerator, its preparation method, and production equipment, which can solve the problems of poor fingerprint resistance and oil stain resistance of the panel surface in the prior art, easy to get fingerprint marks or oil stains during daily use, and difficulty in cleaning the stains after they adhere.

[0006] A front panel production device for an air-cooled refrigerator includes a first unwinding assembly for unwinding a substrate board, a second unwinding assembly for unwinding a metallic-textured film, and a third unwinding assembly for unwinding a PET fingerprint-resistant film; a first adhesive coating assembly is disposed downstream of the first unwinding assembly, and a second adhesive coating assembly is disposed downstream of the third unwinding assembly; a first composite assembly is disposed downstream of the first adhesive coating assembly, and a second composite assembly is disposed downstream of the third unwinding assembly; a winding assembly is disposed downstream of the second composite assembly, and a plurality of guide rollers are disposed upstream of the winding assembly.

[0007] The present invention provides a front panel production equipment for air-cooled refrigerators, which, compared with the prior art, has the following beneficial effects, but is not limited to: The air-cooled refrigerator front panel production equipment uses a third unwinding assembly to introduce a PET fingerprint-resistant film, and a second adhesive coating assembly to coat its surface. Finally, a second composite assembly firmly bonds it to a primary composite board formed by a substrate and a metallic film through a first adhesive coating assembly and a first composite assembly. The outermost PET fingerprint-resistant film, with its excellent hydrophobic and oleophobic properties, directly endows the panel with superior fingerprint resistance and oil stain resistance, making stains easy to clean and maintaining a clean appearance for a long time.

[0008] Furthermore, the first coating assembly includes a slit extrusion die and a conveying roller. The slit extrusion die is disposed on one side of the conveying roller, and the conveying roller is disposed downstream of the first unwinding assembly for conveying the unwinding substrate.

[0009] Furthermore, the second coating assembly includes a glue tank, a glue roller, and a pressure roller. The glue roller is disposed inside the glue tank and located below the pressure roller. The pressure roller is disposed downstream of the third unwinding assembly and is used to transport the PET fingerprint-resistant film.

[0010] Furthermore, a glue-splitting roller is provided on one side of the glue-pressing roller, and a recycling tank is provided below the glue-splitting roller.

[0011] Furthermore, the recycling pool is located above the glue pool, and the recycling pool is connected to the glue pool via a guide pipe.

[0012] Furthermore, the first composite component includes a first upper pressure roller and a first lower pressure roller, the first upper pressure roller being disposed downstream of the second unwinding component, and the first lower pressure roller being disposed downstream of the first unwinding component.

[0013] Furthermore, the second composite component includes a second upper pressure roller and a second lower pressure roller, the second upper pressure roller being disposed downstream of the third unwinding component, and the second lower pressure roller being disposed downstream of the first unwinding component.

[0014] A method for manufacturing a front panel of an air-cooled refrigerator includes: S1: The substrate, metallic film and PET fingerprint-resistant film are conveyed by the first unwinding assembly, the second unwinding assembly and the third unwinding assembly respectively; S2: Apply PUR hot melt adhesive to the surface of the substrate using the first adhesive application component; S3: The substrate plate coated with PUR hot melt adhesive is pressed together with the metallic film through the first composite component to complete the first composite and form a primary composite plate. S4. Apply a two-component polyurethane adhesive to the surface of the PET fingerprint-resistant film using the second coating assembly; S5. The PET fingerprint-resistant film coated with a two-component polyurethane adhesive is pressed together with the primary composite board through the second composite component to complete the second composite process, thereby obtaining the front panel of the air-cooled refrigerator, and then wound up by the winding component.

[0015] A front panel for a frost-free refrigerator includes a substrate, a metallic film, and a PET fingerprint-resistant film. The metallic film is disposed between the substrate and the PET fingerprint-resistant film. A PUR hot melt adhesive layer is disposed between the substrate and the metallic film. A two-component polyurethane adhesive layer is disposed between the substrate and the PET fingerprint-resistant film.

[0016] Furthermore, the substrate is a HIPS board, and the metallic film is an aluminum foil. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a front panel production equipment for an air-cooled refrigerator according to an embodiment of the present invention; Figure 2 for Figure 1 Schematic diagram of the structure of the second adhesive coating assembly; Figure 3 This is a flowchart of a method for preparing the front panel of an air-cooled refrigerator according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the front panel of a frost-free refrigerator according to an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures: 1. Substrate board; 2. Metallic film; 3. PET fingerprint-resistant film; 4. First unwinding assembly; 5. Second unwinding assembly; 6. Third unwinding assembly; 7. First adhesive coating assembly; 8. Second adhesive coating assembly; 9. First composite assembly; 10. Second composite assembly; 11. Rewinding assembly; 12. Guide roller; 101. PUR hot melt adhesive layer; 102. Two-component polyurethane adhesive layer; 71. Slit extrusion die; 72. Conveyor roller; 81. Adhesive tank; 82. Adhesive roller; 83. Pressure roller; 84. Spreading roller; 85. Recycling tank; 86. Guide tube; 91. First upper pressure roller; 92. First lower pressure roller; 1001. Second upper pressure roller; 1002. Second lower pressure roller. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings showing multiple embodiments according to this application. It should be understood that the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments described in this application without creative effort will fall within the scope of protection of this application.

[0020] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing specific embodiments only and is not intended to limit this application; the terms "comprising," "including," "having," "containing," etc., in the description, claims, and accompanying drawings of this application are open-ended terms. Therefore, "comprising," "including," or "having" refers to, for example, a method or apparatus having one or more steps or elements, but is not limited to having only these one or more elements. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0021] In the description of this invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] Furthermore, in the attached diagram, the Y-axis represents the horizontal direction, that is, the left and right position, and the positive direction of the Y-axis (that is, the direction the arrow points to) represents the left, and the negative direction of the Y-axis (that is, the direction opposite to the positive direction of the Y-axis) represents the right; in the attached diagram, the Z-axis represents the vertical direction, that is, the up and down position, and the positive direction of the Z-axis (that is, the direction the arrow points to) represents the up, and the negative direction of the Z-axis (that is, the direction opposite to the positive direction of the Z-axis) represents the down.

[0023] It should also be noted that the meanings of the aforementioned Y-axis and Z-axis are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0024] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0025] It should be emphasized that when the term "comprising / including" is used in this specification, it is used to explicitly indicate the presence of the stated feature, integer, step, or component, but does not exclude the presence or addition of one or more other features, integers, steps, parts, or groups of features, integers, steps, or parts.

[0026] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0027] See Figure 1 As shown in the figure, an embodiment of the present invention provides a front panel production equipment for an air-cooled refrigerator, including a first unwinding assembly 4 for unwinding a substrate board 1, a second unwinding assembly 5 for unwinding a metallic textured film 2, and a third unwinding assembly 6 for unwinding a PET fingerprint-resistant film 3; a first adhesive coating assembly 7 is disposed downstream of the first unwinding assembly 4, and a second adhesive coating assembly 8 is disposed downstream of the third unwinding assembly 6; a first composite assembly 9 is disposed downstream of the first adhesive coating assembly 7, and a second composite assembly 10 is disposed downstream of the third unwinding assembly 6; a winding assembly 11 is disposed downstream of the second composite assembly 10, and a plurality of guide rollers 12 are disposed upstream of the winding assembly 11.

[0028] In this embodiment, the equipment uses the first unwinding assembly 4 for unwinding the substrate 1, the second unwinding assembly 5 for unwinding the metallic film 2, and the third unwinding assembly 6 for unwinding the PET fingerprint-resistant film 3 as the material supply starting points, corresponding to the stable delivery of the three core raw materials, ensuring continuous and independently controllable material supply during the production process, and avoiding the impact of a single unwinding assembly failure on the overall production. Simultaneously, the first adhesive coating assembly 7 is positioned downstream of the first unwinding assembly 4, allowing the substrate 1 to directly enter the adhesive coating process after being unwound from the first unwinding assembly 4, reducing the conveying distance and exposure time of the substrate 1, and lowering the risk of surface contamination. The second adhesive coating assembly 8 and the second composite assembly 10 are sequentially positioned downstream of the third unwinding assembly 6, enabling rapid adhesive coating and lamination after the PET fingerprint-resistant film 3 is unwound, shortening the process interval and avoiding the need for adhesive coating... The adhesive undergoes performance changes due to prolonged storage. A third unwinding assembly 6 is used to introduce the PET fingerprint-resistant film 3, which is then coated onto its surface by a second coating assembly 8. Finally, a second composite assembly 10 firmly bonds it to the primary composite board formed by the substrate 1 and the metallic film 2 via the first coating assembly 7 and the first composite assembly 9. The outermost PET fingerprint-resistant film 3, with its excellent hydrophobic and oleophobic properties, directly endows the panel with superior fingerprint and oil resistance, making stains easy to clean and maintaining a clean appearance for a long time. Guide rollers 12 correct the conveying direction and adjust the tension of the finished panel after secondary lamination, ensuring a flat and wrinkle-free panel during winding. The winding assembly 11 enables continuous winding of the finished product, forming a complete closed-loop production process of unwinding, coating, lamination, and winding. The overall structure eliminates the need for material transfer between equipment, reducing material loss and manual intervention in intermediate stages, significantly improving production efficiency. The orderly layout of each component also facilitates daily maintenance and parameter adjustment, adapting to the needs of continuous industrial mass production.

[0029] Specifically, by setting a first coating component 7 downstream of the first unwinding component 4, PUR hot melt adhesive can be precisely applied to the substrate board 1, ensuring that the subsequent metallic film 2 released from the second unwinding component 5 is stably bonded at the first composite component 9 to form a tightly structured primary composite board. Downstream of the third unwinding component 6, a second coating component 8 and a second composite component 10 are sequentially set, enabling the PET fingerprint-resistant film 3 to quickly complete the coating of the two-component polyurethane adhesive and bond with the primary composite board. After curing, the adhesive is colorless and transparent, which does not affect the protective performance of the PET fingerprint-resistant film 3, and the two-component curing characteristics ensure that the PET fingerprint-resistant film 3 is tightly bonded to the primary composite board, allowing the hydrophobic and oleophobic layer of the PET fingerprint-resistant film 3 to continue to function.

[0030] like Figure 1 As shown, the first adhesive coating assembly 7 includes a slit extrusion die 71 and a conveying roller 72. The slit extrusion die 71 is disposed on one side of the conveying roller 72, and the conveying roller 72 is disposed downstream of the first unwinding assembly 4 for conveying the unwound substrate 1.

[0031] In this embodiment, the conveying roller 72 is positioned downstream of the first unwinding assembly 4, directly receiving the substrate board 1 released from the first unwinding assembly 4. This achieves a seamless connection between the substrate board 1 and the adhesive coating process, preventing the substrate board 1 from becoming contaminated with impurities due to prolonged exposure during transport, or from shifting or wrinkling due to an excessively long transport path. This ensures that the substrate board 1 enters the adhesive coating stage in a flat and clean state, laying the foundation for stable lamination with the metallic film 2. The slit extrusion die 71 is positioned on one side of the conveying roller 72. While conveying the substrate board 1, the conveying roller 72 provides stable support for the substrate board 1, keeping the adhesive coating surface of the substrate board 1 flat. The slit extrusion die 71 allows for precise control of the extrusion amount and coating width of the PUR hot melt adhesive. This avoids material waste caused by adhesive overflow in traditional adhesive coating methods and ensures that the adhesive is evenly distributed on the surface of the substrate board 1, preventing problems such as weak interlayer adhesion due to insufficient local adhesive amount when laminating with the metallic film 2.

[0032] like Figure 1 As shown, the second coating assembly 8 includes a glue tank 81, a glue roller 82, and a pressure roller 83. The glue roller 82 is disposed inside the glue tank 81 and located below the pressure roller 83. The pressure roller 83 is disposed downstream of the third unwinding assembly 6 and is used to transport the PET fingerprint-resistant film 3.

[0033] In this embodiment, the pressure roller 83 is positioned downstream of the third unwinding assembly 6, directly receiving the PET fingerprint-resistant film 3 released from the third unwinding assembly 6. This achieves a seamless connection between unwinding and coating of the PET fingerprint-resistant film 3, preventing surface scratches or contamination of the film material due to friction or exposure during transport. This ensures that the PET fingerprint-resistant film 3 enters the coating stage in good condition. The glue roller 82 is positioned inside the glue tank 81 and below the pressure roller 83. The glue tank 81 continuously provides the glue roller 82 with a two-component polyurethane adhesive. When the glue roller 82 rotates, it can evenly absorb the adhesive. Then, through cooperation with the pressure roller 83, the adhesive is stably transferred to the surface of the PET fingerprint-resistant film 3. This dip-and-transfer coating method avoids the problem of adhesive waste in traditional coating and ensures a uniform coating amount. It prevents the light transmittance of the PET fingerprint-resistant film 3 from being affected by excessive local adhesive amount, or the subsequent bonding with the primary composite board from being weak due to insufficient adhesive amount.

[0034] like Figure 1 As shown, a glue-spreading roller 84 is provided on one side of the glue-spreading roller 83, and a recycling tank 85 is provided below the glue-spreading roller 84.

[0035] In this embodiment, the spreading roller 84 is positioned close to the pressure roller 83 to receive the PET fingerprint-resistant film 3 after the initial adhesive application by the pressure roller 83. Through the rolling and adhesion between the spreading roller 84 and the PET fingerprint-resistant film 3, the two-component polyurethane adhesive transferred by the pressure roller 83 is further spread and smoothed, avoiding localized adhesive accumulation or uneven adhesive layer thickness. This not only prevents the light transmittance of the PET fingerprint-resistant film 3 from being affected by uneven adhesive layer thickness, but also ensures that the force is uniform and the adhesion is tight when bonding with the primary composite board. The recycling tank 85 below the spreading roller 84 can accurately collect excess adhesive scraped off during the spreading process, avoiding direct dripping of adhesive that would cause waste or contamination of the equipment. The recycled adhesive can be reused after subsequent processing, significantly improving raw material utilization, reducing production costs, and maintaining a clean working environment for the equipment.

[0036] like Figure 2 As shown, the recycling tank 85 is located above the glue tank 81, and the recycling tank 85 is connected to the glue tank 81 through the guide pipe 86.

[0037] In this embodiment, the recycling tank 85 is located above the adhesive tank 81. Gravity allows excess two-component polyurethane adhesive collected in the recycling tank 85 to naturally flow back into the adhesive tank 81 through the guide pipe 86. This eliminates the need for an additional power unit, simplifying the equipment structure, reducing energy consumption, and preventing recycling interruptions due to power unit failure. Furthermore, this closed-loop design allows the recycled adhesive to directly return to the adhesive tank 81 for subsequent coating processes, eliminating the need for manual transfer and filtration. This not only reduces adhesive loss and pollution risks during transport but also significantly improves raw material utilization, effectively lowers production costs, and avoids the environmental pressure associated with waste adhesive disposal.

[0038] like Figure 1 As shown, the first composite component 9 includes a first upper pressure roller 91 and a first lower pressure roller 92. The first upper pressure roller 91 is located downstream of the second unwinding component 5, and the first lower pressure roller 92 is located downstream of the first unwinding component 4.

[0039] In this embodiment, the first lower pressure roller 92 is located downstream of the first unwinding assembly 4, which can accurately receive the substrate board 1 after it has been coated with glue by the first glue coating assembly 7. The first upper pressure roller 91 is located downstream of the second unwinding assembly 5, which can simultaneously receive the metallic film 2 released from the second unwinding assembly 5. This allows the substrate board 1 (lower) and the metallic film 2 (upper) to be accurately aligned before entering between the two pressure rollers, avoiding the composite misalignment problem caused by material offset, ensuring the appearance regularity of the primary composite board, and reducing the waste material caused by misalignment, thereby improving the utilization rate of raw materials.

[0040] like Figure 1As shown, the second composite component 10 includes a second upper pressure roller 1001 and a second lower pressure roller 1002. The second upper pressure roller 1001 is disposed downstream of the third unwinding component 6, and the second lower pressure roller 1002 is disposed downstream of the first unwinding component 4.

[0041] In this embodiment, the second lower pressure roller 1002 is located downstream of the first unwinding assembly 4 and can accurately receive the primary composite board (substrate board 1 + metallic film 2) made by the first composite assembly 9. The second upper pressure roller 1001 is correspondingly located downstream of the third unwinding assembly 6 and can simultaneously receive the PET fingerprint-resistant film 3 after being coated by the second coating assembly 8. This allows the primary composite board (lower) and the PET fingerprint-resistant film 3 (upper) to be accurately aligned before entering between the two pressure rollers, avoiding incomplete coverage or misalignment of the PET fingerprint-resistant film 3 due to material offset. This ensures the integrity of the metallic texture and stain-resistant protection area of ​​the finished panel, while reducing edge cutting waste caused by misalignment and further improving the utilization rate of raw materials.

[0042] like Figure 3 As shown, a method for preparing the front panel of an air-cooled refrigerator includes: S1: conveying a substrate 1, a metallic film 2, and a PET fingerprint-resistant film 3 through a first unwinding assembly 4, a second unwinding assembly 5, and a third unwinding assembly 6 respectively; S2: applying PUR hot melt adhesive to the surface of the substrate 1 through a first adhesive coating assembly 7; S3: pressing the substrate 1 coated with PUR hot melt adhesive and the metallic film 2 together through a first composite assembly 9 to complete the first composite and form a primary composite panel; S4: applying a two-component polyurethane adhesive to the surface of the PET fingerprint-resistant film 3 through a second adhesive coating assembly 8; S5: pressing the PET fingerprint-resistant film 3 coated with two-component polyurethane adhesive and the primary composite panel together through a second composite assembly 10 to complete the second composite, thereby obtaining the front panel of the air-cooled refrigerator, and then winding it up through a winding assembly 11.

[0043] In this embodiment, the first unwinding assembly 4, the second unwinding assembly 5, and the third unwinding assembly 6 simultaneously transport the substrate 1, the metallic film 2, and the PET fingerprint-resistant film 3, respectively, achieving independent and controllable supply of the three core raw materials. This avoids the impact of a single raw material supply failure on the overall process and lays the foundation for the seamless connection of subsequent processes. The first adhesive coating assembly 7 precisely applies PUR hot melt adhesive to the surface of the substrate 1. Combined with the structural advantages of the assembly itself, this ensures uniform and waste-free adhesive application on the substrate 1, providing a reliable bonding foundation for the first lamination. The first lamination assembly 9 then bonds the adhesive-coated substrate 1 to the metallic film 2. The pressing process involves two pressure rollers working together to ensure a tight bond between the two components, forming a robust primary composite panel. A second adhesive coating assembly 8 applies a two-component polyurethane adhesive to the surface of the PET fingerprint-resistant film 3. The assembly's uniform coating and recycling structure ensure even application and high material utilization, providing a colorless, transparent, and stable adhesive layer for secondary lamination. The second lamination assembly 10 then presses the adhesive-coated PET fingerprint-resistant film 3 to the primary composite panel, achieving secondary lamination. This ensures complete adhesion of the hydrophobic and oleophobic layer of the PET fingerprint-resistant film 3 to address stain resistance issues, while the winding assembly 11 promptly winds up the finished product to prevent panel exposure and damage. The entire process is interconnected, utilizing specialized equipment to achieve a closed-loop "convey-adhesive-lamination-winding" process. This not only improves production efficiency and reduces costs but also ensures stable performance of the finished panel, fundamentally addressing the pain points of existing composite panels.

[0044] like Figure 4 As shown, a front panel of an air-cooled refrigerator includes a substrate 1, a metallic film 2, and a PET fingerprint-resistant film 3. The metallic film 2 is disposed between the substrate 1 and the PET fingerprint-resistant film 3. A PUR hot melt adhesive layer 101 is disposed between the substrate 1 and the metallic film 2. A two-component polyurethane adhesive layer 102 is disposed between the substrate 1 and the PET fingerprint-resistant film 3.

[0045] In this embodiment, the metallic film 2 is sandwiched between the substrate 1 and the PET fingerprint-resistant film 3. This retains the strong texture of the metal material, meeting consumers' demands for a high-end refrigerator product, while the substrate 1 and the PET fingerprint-resistant film 3 on both sides provide double protection, avoiding the problem of traditional metal panels being easily bumped and deformed, thus improving the panel's impact resistance and service life. The PUR hot melt adhesive layer 101 between the substrate 1 and the metallic film 2 has high bonding strength and excellent low-temperature resistance, making it suitable for the refrigerator's refrigeration environment and ensuring a tight fit between the two. The metallic film 2 and the PET... The two-component polyurethane adhesive layer 102 between the fingerprint-resistant films 3 is colorless and odorless after curing and has stable adhesion. It does not affect the transparent texture of the PET fingerprint-resistant film 3, and ensures that the PET fingerprint-resistant film 3 is firmly attached. The hydrophobic and oleophobic properties of the PET fingerprint-resistant film 3 can effectively resist fingerprint stains and oil stains, making it easy to clean. In addition, the two adhesive layers are matched with different material properties to ensure that the structure of each layer is tightly bonded, avoiding delamination and warping during long-term use, improving the overall structural stability of the panel, and allowing the panel to maintain a high-value metallic texture while having the practical performance of being fingerprint-resistant and easy to clean.

[0046] The substrate 1 is a HIPS board, and the metallic film 2 is an aluminum foil. The HIPS board has good toughness and impact resistance. As the bottom support of the panel, it can effectively buffer external impacts during transportation, assembly and use. Combined with the protective function of the outer PET fingerprint-resistant film 3, it can avoid the problem of the intermediate metallic film 2 being easily deformed and scratched due to its high brittleness. It completely solves the defect of traditional metal panels being easily damaged and scrapped. At the same time, the HIPS board has excellent processing performance and can stably adapt to the composite process with aluminum foil. The metallic film 2 is an aluminum foil. The aluminum foil and the PET fingerprint-resistant film 3 are connected by a two-component polyurethane adhesive layer 102. After curing, the adhesive layer is colorless and transparent, which does not cover the metallic texture of the aluminum foil. At the same time, it ensures that the hydrophobic and oleophobic layer of the PET fingerprint-resistant film 3 can play its role. It resists fingerprints and oil stains, solves the stain resistance problem of existing composite panels, and allows the panel to have a longer service life while having both high appearance and strong protection.

[0047] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A production equipment for the front panel of an air-cooled refrigerator, characterized in that, It includes a first unwinding assembly (4) for unwinding a substrate board (1), a second unwinding assembly (5) for unwinding a metallic film (2), and a third unwinding assembly (6) for unwinding a PET fingerprint-resistant film (3). A first coating assembly (7) is provided downstream of the first unwinding assembly (4), and a second coating assembly (8) is provided downstream of the third unwinding assembly (6). A first composite component (9) is provided downstream of the first adhesive coating component (7), and a second composite component (10) is provided downstream of the third unwinding component (6). Downstream of the second composite component (10) is a winding component (11), and upstream of the winding component (11) are multiple guide rollers (12).

2. The air-cooled refrigerator front panel production equipment as described in claim 1, characterized in that, The first coating assembly (7) includes a slit extrusion die (71) and a conveying roller (72). The slit extrusion die (71) is disposed on one side of the conveying roller (72), and the conveying roller (72) is disposed downstream of the first unwinding assembly (4) for conveying the unwinding substrate board (1).

3. The air-cooled refrigerator front panel production equipment as described in claim 1, characterized in that, The second coating assembly (8) includes a glue tank (81), a glue roller (82) and a pressure roller (83). The glue roller (82) is disposed inside the glue tank (81) and below the pressure roller (83). The pressure roller (83) is disposed downstream of the third unwinding assembly (6) and is used to transport the PET fingerprint-resistant film (3).

4. The air-cooled refrigerator front panel production equipment as described in claim 3, characterized in that, A glue-spreading roller (84) is provided on one side of the glue-spreading roller (83), and a recycling tank (85) is provided below the glue-spreading roller (84).

5. The air-cooled refrigerator front panel production equipment as described in claim 4, characterized in that, The recycling pool (85) is located above the glue pool (81), and the recycling pool (85) is connected to the glue pool (81) through a guide pipe (86).

6. The air-cooled refrigerator front panel production equipment as described in claim 1, characterized in that, The first composite component (9) includes a first upper pressure roller (91) and a first lower pressure roller (92). The first upper pressure roller (91) is located downstream of the second unwinding component (5), and the first lower pressure roller (92) is located downstream of the first unwinding component (4).

7. The air-cooled refrigerator front panel production equipment as described in claim 1, characterized in that, The second composite component (10) includes a second upper pressure roller (1001) and a second lower pressure roller (1002). The second upper pressure roller (1001) is disposed downstream of the third unwinding component (6), and the second lower pressure roller (1002) is disposed downstream of the first unwinding component (4).

8. A method for manufacturing a front panel of a frost-free refrigerator, using the frost-free refrigerator front panel manufacturing equipment as described in claim 1, characterized in that, include: S1: The substrate board (1), the metallic film (2) and the PET fingerprint-resistant film (3) are conveyed by the first unwinding assembly (4), the second unwinding assembly (5) and the third unwinding assembly (6) respectively; S2: Apply PUR hot melt adhesive to the surface of the substrate board (1) using the first adhesive application component (7); S3: The substrate board (1) coated with PUR hot melt adhesive is pressed together with the metallic film (2) by the first composite component (9) to complete the first composite and form a primary composite board; S4. Apply a two-component polyurethane adhesive to the surface of the PET fingerprint-resistant film (3) using the second coating assembly (8); S5. The PET fingerprint-resistant film (3) coated with two-component polyurethane adhesive is pressed with the primary composite board through the second composite component (10) to complete the second composite and obtain the front panel of the air-cooled refrigerator. The front panel is then wound up by the winding component (11).

9. A front panel of a wind-cooled refrigerator, prepared by the method described in claim 8, characterized in that, include: The substrate (1), the metallic film (2) and the PET fingerprint-resistant film (3) are provided. The metallic film (2) is disposed between the substrate (1) and the PET fingerprint-resistant film (3). A PUR hot melt adhesive layer (101) is disposed between the substrate (1) and the metallic film (2). A two-component polyurethane adhesive layer (102) is disposed between the substrate (1) and the PET fingerprint-resistant film (3).

10. The front panel of the air-cooled refrigerator as described in claim 9, characterized in that, The substrate (1) is a HIPS board, and the metallic film (2) is an aluminum foil.

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