Electrodeposition of aluminum with low energy consumption for color layer heating and dehumidification coating device

Abstract

The utility model discloses a kind of electrochemical aluminum low-energy consumption color layer heating dehumidification coating devices, including unwinding shaft, color layer coating device, drying oven, winding shaft and heating dehumidification mechanism.The heating dehumidification mechanism includes lamp tube fixed plate, reflecting plate, side reflecting film, insulating plate and heating, a pair of lamp tube fixed plate is fixed on rack by support and connecting piece parallel, lamp tube fixed plate inclination angle is consistent with the inclination angle of electrochemical aluminum film paper, so that the working surface of several heating pipes installed on lamp tube fixed plate is parallel with electrochemical aluminum film paper direction.The setting of heating dehumidification mechanism avoids the direct convection of electrochemical aluminum film coating color layer and air, improves the air temperature of ambient environment of electrochemical aluminum film after coating before entering drying channel, reduces the temperature difference between electrochemical aluminum film and ambient air, simultaneously makes the water vapor volatilization around electrochemical aluminum film after coating color layer, reduces the probability of water mist blooming on figure and text, improves the quality of electrochemical aluminum.

Description

Technical Field

[0001] This utility model relates to the technical field of electroplated aluminum coating machines, specifically to an electroplated aluminum low-energy color layer heating and dehumidification coating device. Background Technology

[0002] Electroplated aluminum hot stamping foil uses heating and pressure to transfer patterns or text onto the surface of the substrate. The hot stamping layer has bright and vibrant colors and a strong metallic texture, creating a striking contrast with the substrate and highlighting the visual effect of advertising and decoration, providing aesthetic enjoyment and a strong visual impact.

[0003] Electroplated aluminum hot stamping foil generally consists of a BOPET film layer, a release layer, a coloring layer, an aluminum plating layer, and a hot melt adhesive layer. The coloring layer is the main component forming the colored electroplated aluminum foil. It is usually made of heat-resistant transparent synthetic resin and dye, dissolved in an organic solvent and directly coated onto the surface of the release layer. In the production of electroplated aluminum hot stamping foil, except for the aluminum plating layer which uses a vacuum aluminum plating process, the release layer, coloring layer, and adhesive backing layer all use a coating process. Coating is the most important production process for electroplated aluminum hot stamping foil. A gravure coating roller transfers the coating solution onto the BOPET film, which is then placed in an oven where the solvent in the coating solution evaporates under high temperature and exhaust ventilation.

[0004] Currently, the coating liquid for coloring layers is mainly solvent-based. After coating, the solvent evaporates, and water vapor is generated around it. If the humidity in the production workshop is too high at this time, the low temperature and water vapor before entering the drying oven will create a large contrast with the temperature of the drying tunnel, resulting in a hazy water mist when entering the drying tunnel, commonly known as "blooming". Summary of the Invention

[0005] To address the problem of excessive temperature difference between the inside and outside of the drying oven, which can easily cause moisture to form on the electroplated aluminum film, this invention provides a low-energy-consumption heating and dehumidification coating device for electroplated aluminum coating. This device can improve the surface condition of the coating layer, thereby enhancing the quality of the electroplated aluminum.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a low-energy-consumption color layer heating and dehumidification coating device for electroplated aluminum, comprising an unwinding shaft 1, a color layer coating device, a drying oven 2 and a rewinding shaft, and further comprising a heating and dehumidification mechanism 3.

[0007] The unwinding shaft 1 is located in front of the color coating device and is used for unwinding. The color coating device includes a frame 4, on which a plurality of conveying rollers and paper guide rollers for conveying the electroplated aluminum film 5, a coating roller 7 and a pressure roller 8 for printing and coating the electroplated aluminum film 5, and a paper output guide roller 9 are rotatably mounted. The dye tray 6 is mounted on the frame 4 and located below the coating roller 7.

[0008] The heating and dehumidifying mechanism 3 is positioned downstream of the coating roller 7 along the movement direction of the electroplated aluminum film 5, and is located between the pressure roller 8 and the paper guide roller 9. The heating and dehumidifying mechanism 3 includes a lamp fixing plate 10, a reflector plate 11, a side reflective film 12, an insulating plate 13, and a heating tube 14. A pair of lamp fixing plates 10 are parallelly fixed to the frame 4 between the pressure roller 8 and the paper guide roller 9 by a bracket 15 and a connector. The lamp fixing plate 10 has a downward angle, which is consistent with the tilt angle of the electroplated aluminum film 5 paper output, so that the lamp fixing plates 10 are installed on the heat exchanger. The working surfaces of several quartz tubes 14 are parallel to the paper output direction of the electroplated aluminum film 5. An insulating plate 13 is fixed on each of the outer sides of the lamp tube fixing plate 10. A side reflective film 12 is provided on the inner sides of both sides of the lamp tube fixing plate 10. Several heating tubes 14 are installed on the lamp tube fixing plate 10, which are arranged in parallel and spaced apart and parallel to the electroplated aluminum film 5. The heating tubes 14 are fixed by the lamp tube fixing plate 10 after passing through the square holes of the side reflective film 12. The reflective plate 11 is inserted behind the lamp tube fixing plate 10 on the side away from the electroplated aluminum film 5 and has an arc-shaped structure with the arc-shaped surface facing the side of the heating tube 14.

[0009] Preferably, a power cord for supplying power to the heating tube 14 is provided between the lamp tube fixing plate 10 and the insulating plate 13, and a protective layer 16 is tightly wrapped around the outside of the lamp tube fixing plate 10 and the insulating plate 13. The frame 4 is provided with a power interface for connecting the power cord and a power switch for controlling the on and off of the control circuit.

[0010] The drying chamber 2 is positioned downstream of the paper guide roller 9 along the direction of movement of the electroplated aluminum film 5, and is used to rapidly evaporate the coating material located in the color layer.

[0011] Furthermore, the dye tray 6 is disposed below the bottom end face of the coating roller 7, and the dye tray 6 is filled with a color coating layer that covers part of the outer wall surface of the coating roller 7.

[0012] Beneficial effects: ① By setting up a heating and dehumidification mechanism, direct convection between the electroplated aluminum film coated with the color layer and the air is avoided, which increases the air temperature of the surrounding environment after the electroplated aluminum film is coated with the color layer and before it enters the drying tunnel, reduces the temperature difference between the electroplated aluminum film and the surrounding air, and at the same time allows the water vapor around the electroplated aluminum film after the color layer is coated to evaporate, reducing the probability of water mist and mottled patterns on the graphics, thereby improving the quality of the electroplated aluminum.

[0013] ② Because a side-reflecting film is added inside the lamp tube fixing plate, the heating tube is fixed by the lamp tube fixing plate after passing through the square hole of the side-reflecting film. The side-reflecting film and the reflector plate reflect the heat emitted by the heating tube together, which improves the efficiency of the heating tube, greatly saves costs, and saves space. The number of heating tubes that can be turned on can be selected according to the humidity and temperature data of the production environment, so that water vapor will not be generated around the electroplated aluminum film entering the drying box, and the electroplated aluminum film will not produce a hazy fog. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the heating and dehumidification mechanism of this utility model.

[0016] Figure 3 This is a schematic diagram of the main structure of the heating and dehumidification mechanism of this utility model.

[0017] In the diagram: 1. Unwinding shaft; 2. Drying oven; 3. Heating and dehumidifying mechanism; 4. Frame; 5. Electroplated aluminum film; 6. Dye tray; 7. Coating roller; 8. Pressure roller; 9. Paper guide roller; 10. Lamp fixing plate; 11. Reflector plate; 12. Side reflective film; 13. Insulating plate; 14. Heating tube; 15. Support; 16. Protective layer. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] like Figure 1-3 As shown, this embodiment discloses a low-energy-consumption color layer heating and dehumidification coating device for electroplated aluminum, including an unwinding shaft 1, a color layer coating device, a drying box 2, and a rewinding shaft. The unwinding shaft 1 is located in front of the color layer coating device and is used for unwinding. The color layer coating device includes a frame 4, on which a plurality of conveying rollers and paper guide rollers for conveying electroplated aluminum film 5 are rotatably mounted, along with a coating roller 7, a pressure roller 8, and a paper output guide roller 9 for printing and coating the electroplated aluminum film 5. A dye tray 6 is mounted on the frame 4 and located below the coating roller 7. The dye tray 6 is located below the bottom end face of the coating roller 7, and the dye tray 6 contains a portion of the color layer coating material covering the outer wall surface of the coating roller 7. The device also includes a heating and dehumidification mechanism 3.

[0020] The heating and dehumidifying mechanism 3 is positioned downstream of the coating roller 7 along the movement direction of the electroplated aluminum film 5, and is located between the pressure roller 8 and the paper guide roller 9. The heating and dehumidifying mechanism 3 includes a lamp fixing plate 10, a reflector plate 11, a side reflective film 12, an insulating plate 13, and quartz tubes 14. A pair of lamp fixing plates 10 are parallelly fixed to the frame 4 between the pressure roller 8 and the paper guide roller 9 by a bracket 15 and a connector. The lamp fixing plate 10 has a downward angle, which is consistent with the tilt angle of the electroplated aluminum film 5, so that the working surfaces of the four quartz tubes 14 installed on the lamp fixing plate 10 are in contact with the electroplated aluminum film 5. The aluminum film 5 is parallel to the paper output direction. An insulating plate 13 is fixed on each of the two outer sides of the lamp tube fixing plate 10. The distance between the insulating plate 13 and the lamp tube fixing plate 10 on the same side is three times the length of the end of the quartz tube 14. A side reflective film 12 is provided on the inner side of both sides of the lamp tube fixing plate 10. Four parallel and spaced quartz tubes 14 are installed on the lamp tube fixing plate 10 and are parallel to the electroplated aluminum film 5. The quartz tubes 14 are fixed by the lamp tube fixing plate 10 after passing through the square hole of the side reflective film 12. The reflective plate 11 is inserted behind the lamp tube fixing plate 10 on the side away from the electroplated aluminum film 5 and has an arc structure with the arc surface facing the side of the quartz tube 14.

[0021] A power cable for supplying power to the quartz tube 14 is provided between the lamp fixing plate 10 and the insulating plate 13, and a protective layer 16 is tightly wrapped around the outside of the lamp fixing plate 10 and the insulating plate 13. The frame 4 is provided with a power interface for connecting the power cable and a power switch for controlling the on and off of the control circuit. The drying box 2 is located downstream of the paper guide roller 9 along the movement direction of the electroplated aluminum film 5, and is used to quickly evaporate the coating located in the color layer.

[0022] During the coating operation, the coating roller 7 is partially immersed in the dye tray 6, which transfers the coating agent in the dye tray 6 to the coating roller 7 to complete the coating operation. Before entering the drying chamber 2 via the paper guide roller 9, the coated aluminum film 5 passes through the heating and dehumidification mechanism 3, which avoids direct convection with the air and increases the ambient air temperature of the aluminum film 5 after the color coating is applied and before entering the drying chamber 2. This effectively improves production efficiency and economic benefits and ensures product quality.

Claims

1. An electrochemical aluminum low-energy consumption color layer heating and dehumidifying coating device, comprising a unwinding shaft (1), a color layer coating device, a drying box (2) and a winding shaft, the unwinding shaft (1) is located at the front side of the color layer coating device for unwinding, the color layer coating device comprises a rack (4), a plurality of conveying rollers for conveying the electrochemical aluminum film (5) are rotatably installed on the rack (4), a coating roller (7) for printing and coating the electrochemical aluminum film (5), a pressing roller (8) and a paper outlet guide roller (9), a dye disc (6) is installed on the rack (4) and located below the coating roller (7); characterized in that: It also includes a heating and dehumidification mechanism (3). The heating and dehumidifying mechanism (3) is located downstream of the coating roller (7) along the movement direction of the electroplated aluminum film (5) and between the pressure roller (8) and the paper guide roller (9). The heating and dehumidifying mechanism (3) includes a lamp fixing plate (10), a reflector plate (11), a side reflector film (12), an insulating plate (13), and a heating tube (14). A pair of lamp fixing plates (10) are fixed in parallel on the frame (4) between the pressure roller (8) and the paper guide roller (9) by a bracket (15) and a connector. The lamp fixing plate (10) has a downward angle, and the tilt angle is consistent with the tilt angle of the electroplated aluminum film (5) paper output, so that the lamps installed on the lamps The working surfaces of several heating tubes (14) on the fixing plate (10) are parallel to the paper output direction of the electroplated aluminum film (5). An insulating plate (13) is fixed on the outer sides of the lamp tube fixing plate (10) respectively. A side reflective film (12) is provided on the inner sides of the lamp tube fixing plate (10). Several parallel and spaced heating tubes (14) are installed on the lamp tube fixing plate (10). The heating tubes (14) are fixed by the lamp tube fixing plate (10) after passing through the square hole of the side reflective film (12). The reflective plate (11) is inserted behind the two lamp tube fixing plates (10) on the side away from the electroplated aluminum film (5) and has an arc structure with the arc surface facing the heating tube (14).

2. The low-energy-consumption color layer heating and dehumidification coating device for electroplated aluminum according to claim 1, characterized in that: A power supply line for powering the heating tube (14) is provided between the lamp tube fixing plate (10) and the insulating plate (13), and a protective layer (16) is tightly wrapped around the outside of the lamp tube fixing plate (10) and the insulating plate (13). The frame (4) is provided with a power interface for connecting the power supply line and a power switch for controlling the on and off of the circuit.

3. The low-energy-consumption color layer heating and dehumidification coating device for electroplated aluminum according to claim 1, characterized in that: The distance between the insulating plate (13) and the lamp tube fixing plate (10) on the same side is 2-5 times the length of the heating tube (14) end.

4. The low-energy-consumption color layer heating and dehumidification coating device for electroplated aluminum according to claim 2, characterized in that: The distance between the insulating plate (13) and the lamp tube fixing plate (10) on the same side is 2-5 times the length of the heating tube (14) end.

5. The low-energy-consumption color layer heating and dehumidification coating device for electroplated aluminum according to any one of claims 1-4, characterized in that: The heating element (14) is a quartz tube or an infrared tube.

6. The low-energy-consumption color layer heating and dehumidification coating device for electroplated aluminum according to any one of claims 1-4, characterized in that: The drying box (2) is positioned downstream of the paper output guide roller (9) along the direction of movement of the electroplated aluminum film (5).

7. The low-energy-consumption color layer heating and dehumidification coating device for electroplated aluminum according to any one of claims 1-4, characterized in that: The dye tray (6) is located below the bottom end of the coating roller (7), and the dye tray (6) contains a color coating layer that covers part of the outer wall of the coating roller (7).

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