Process for the production of water-resistant electrochemical aluminum

Abstract

The application discloses a water-resistant electrochemical aluminum production process and relates to the technical field of electrochemical aluminum production. The water-resistant electrochemical aluminum production process comprises a coating box, left and right end side walls of which are respectively provided with inlets and outlets; two partitions are fixedly connected in the coating box, and the partitions divide the coating box into a coating chamber, a first drying chamber and a second drying chamber; two coating rollers are arranged in the coating chamber; two coating boxes are arranged on the side walls of the two coating rollers in the coating chamber, and the side walls of the coating rollers penetrate through coating ports and extend into the coating boxes; two pressing rollers are arranged above the two coating rollers in a lifting mode; and four drying assemblies are arranged in the first drying chamber, the second drying chamber and a third drying chamber, and the two drying assemblies of the third drying chamber are respectively arranged on the right sides of the two coating rollers. The water-resistant electrochemical aluminum production process has the advantages of convenient use, improved drying effect and efficiency during coating and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrochemical aluminum production, and in particular to a water-resistant electrochemical aluminum production process. BACKGROUND

[0002] In the production and processing of water-resistant electrochemical aluminum, a full-water release coating is applied to the substrate layer to improve the water resistance of the electrochemical aluminum. The full-water release coating is mainly coated by a screen coater. After the screen roller coating is completed, drying is required. The existing coating machine can only achieve single-temperature drying. If the temperature is too high, it can easily cause the full-water release coating to dry too much, affecting the water resistance of the full-water release coating. If the temperature is too low, it can easily cause the full-water release coating to dry for a long time, resulting in low efficiency.

[0003] For example, patent application number CN201910474330.7 discloses a full-water release coating for electrochemical aluminum stamping foil and a preparation method thereof. In this patent, the full-water release coating is coated on the surface of a polyester film at a humidity of 50-70% by a 280-mesh screen roller at an oven temperature of 80-120-135-100°C, a coating machine speed of 100-120 m / min, and a wet coating amount of 4.5-5.0 g / m. Then, a color layer, an aluminum plating layer, and a glue layer are sequentially added to the coating surface. Finally, after stamping, each coating layer quickly separates from the polyester film and is transferred and bonded to the surface of the printing substrate.

[0004] The screen coater used in the prior art requires a stepwise drying temperature. The substrate layer coated with the full-water release coating needs to be guided out of the coating machine for drying, which can easily cause dust to stick to the full-water release coating and can also easily cause the full-water release coating to be uneven during movement due to vibration. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a water-resistant electrochemical aluminum production process to solve the problem of the lack of a stepwise drying function in the coating machine in the prior art described in the background.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solution: a water-resistant electrochemical aluminum production device, comprising

[0007] A coating box has inlet and outlet on the left and right end side walls;

[0008] Two partitions are fixedly connected in the coating box. The partitions divide the coating box into a coating chamber, a first drying chamber, and a second drying chamber. The partitions have through holes corresponding to the positions of the inlets and outlets;

[0009] Two coating rollers are arranged in the coating chamber. The outer circumferential wall of the coating roller has a screen layer. The two coating rollers are used for layered coating of the coating material;

[0010] Two paint boxes are arranged on the side wall of the two coating rollers respectively, and the side wall of the paint box is provided with a paint port, and the side wall of the coating roller penetrates the paint port and extends into the paint box;

[0011] Two pressing rollers are arranged above the two coating rollers respectively;

[0012] Two scrapers are arranged in the coating box, and the two scrapers are used to scrape the excess paint on the mesh layer;

[0013] Four drying assemblies are arranged in the first drying chamber, one is arranged in the second drying chamber, and two are arranged in the third drying chamber, and the two drying assemblies of the third drying chamber are located on the right side of the two coating rollers respectively.

[0014] Among them, the four drying assemblies are used to provide different drying temperatures respectively.

[0015] Preferably, the bottom of the coating chamber is fixedly connected with a receiving pool, and the receiving pool is located below the two coating rollers.

[0016] Preferably, the upper end wall of the coating chamber is fixedly connected with a lifting cylinder corresponding to the position of the pressing roller, the output end of the lifting cylinder is fixedly connected with a lifting plate, and the pressing roller is rotatably connected with the lifting plate.

[0017] Preferably, the drying assembly comprises a first drying assembly,

[0018] The first drying assembly comprises:

[0019] A first drying box is fixedly connected to the inner side wall of the coating box, and the left and right end side walls of the first drying box are respectively provided with first moving holes;

[0020] An air inlet box is fixedly connected to the lower end wall of the first drying box and penetrates the lower end wall, and one end of the air inlet box extending into the first drying box is provided with an air inlet hole;

[0021] An air suction box is fixedly connected to the upper end wall of the first drying box and penetrates the upper end wall, and one end of the air suction box extending into the first drying box is provided with an air suction hole.

[0022] Preferably, the front and rear side walls of the first drying box are respectively fixedly connected with positioning pipes penetrating the side walls, and the two ends of the positioning pipes extending into the first drying box are rotatably connected with the two ports of a rotating sleeve, one of the positioning pipes is communicated with the air inlet box through a first connecting pipe, and the rotating sleeve is in contact with the surface of the polyester film to transfer heat.

[0023] Preferably, two outer walls of the first drying box are respectively fixedly connected with first air suction pipes, the first air suction pipes are provided with first air suction holes corresponding to the first moving holes, and the first air suction pipes are respectively communicated with the air suction box through the air pipes.

[0024] Preferably, the drying assembly comprises a second drying assembly,

[0025] The second drying assembly comprises:

[0026] A second drying box is fixedly connected to the inner side wall of the coating box, and the left and right end side walls of the second drying box are respectively provided with second moving holes;

[0027] A conveying belt is arranged in the second drying box, and the second moving holes are located between the upper end conveying surface and the lower end conveying surface of the conveying belt;

[0028] A plurality of moving boxes are respectively fixedly connected to the opposite surfaces of the upper end conveying surface and the lower end conveying surface of the conveying belt, one side of the moving box opposite to the conveying belt is provided with a plurality of air outlet holes, and the adjacent moving boxes are communicated through the second connecting pipes;

[0029] The moving box in the upper end conveying surface and the moving box in the lower end conveying surface of the conveying belt are respectively provided with air guide pipes, the air guide pipes penetrate through the second drying box, and the air guide pipes are metal hoses.

[0030] Preferably, the second drying assembly further comprises:

[0031] A plurality of second air suction pipes penetrate through the left and right end side walls of the second drying box and are fixedly connected with the second drying box, and the second air suction pipes are provided with second air suction holes corresponding to the positions of the polyester film in the second drying box.

[0032] A production process based on the production equipment of the water-resistant anodized aluminum, and the specific steps are as follows:

[0033] The polyester film passes through the inlet and outlet and the through hole, then the coating roller rotates to enable the mesh layer to take out the paint in the paint box and then scrape off the excess paint by the scraper, so that the paint in the mesh layer can be applied to the lower surface of the polyester film, and the pressure roller can enable the polyester film to tightly adhere to the coating roller, the first coating roller applies one-half layer of full water-based release coating on the polyester film, then passes through an drying assembly to perform drying treatment at a temperature of 80 degrees Celsius, the second coating roller applies another one-half layer of full water-based release coating on the polyester film, then passes through an drying assembly to perform drying treatment at a temperature of 120 degrees Celsius, then the drying assembly in the first drying chamber performs drying treatment at a temperature of 135 degrees Celsius, and the drying assembly in the second drying chamber performs drying treatment at a temperature of 100 degrees Celsius.

[0034] The steps for using the first drying component as the drying component are as follows: hot air first flows into the rotating sleeve through a positioning tube, and then through another positioning tube and the first connecting pipe to the air inlet box. After absorbing heat energy, the rotating sleeve can transfer the heat energy to the polyester film. Hot air flows from the air inlet hole on the air inlet box into the first drying box to dry the all-water-based release coating on the polyester film that has passed through the first moving hole. The air inlet on the suction box can suck away the dried air in the first drying box to achieve air pressure balance. The first air inlet on the first suction pipe can suck away the air flowing out of the first moving hole. At the same time, the first suction pipe and the suction box are connected through a vent pipe.

[0035] The steps for using the second drying component as the drying component are as follows: the conveyor belt drives the moving box to move back and forth, so that the air outlet on the moving box blows hot air onto both sides of the polyester film, thereby drying the all-water-based release coating on the polyester film that passes through the second moving hole. The second connecting pipe connects the moving boxes to each other. The hot air that bounces off the polyester film after drying is sucked away through the second air outlet on the second air outlet, reducing the heat absorption and outflow from the second air outlet.

[0036] The beneficial effects of adopting the above technical solutions are:

[0037] The process of applying the all-water-based release coating of the release layer onto the polyester film in the production process of water-resistant electroplated aluminum in this application improves the drying effect by applying the coating in layers. At the same time, the subsequent drying process can be carried out in stages by applying the coating at different temperatures, which can effectively improve the drying efficiency and effect. Compared with the coating method in the prior art, it is faster and more stable. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of a water-resistant electroplated aluminum production equipment according to the present invention.

[0039] Figure 2 This is a cross-sectional view of a water-resistant electroplated aluminum production device with a first drying component according to the present invention.

[0040] Figure 3 This is a schematic diagram of the first drying component of the present invention.

[0041] Figure 4 This is a cross-sectional view of the first drying component of the present invention.

[0042] Figure 5 This is a side sectional view of the first drying component of the present invention.

[0043] Figure 6 This is a cross-sectional view of a water-resistant electroplated aluminum production device with a second drying component according to the present invention.

[0044] Figure 7is a schematic view of the second drying assembly of the present application.

[0045] Figure 8 is a sectional view of the second drying assembly of the present application.

[0046] Figure 9 is a lateral sectional view of the second drying assembly of the present application.

[0047] Wherein: the coating box 100, the support plate 110, the inlet and outlet 200, the partition plate 300, the through hole 310, the coating chamber 400, the first drying chamber 410, the second drying chamber 420, the clamp pin 430, the coating roller 500, the mesh layer 510, the paint box 520, the paint port 530, the scraper 540, the receiving pool 550, the compression roller 600, the lifting plate 610, the lifting cylinder 620, the first drying assembly 700, the first drying box 710, the first moving hole 720, the air inlet box 730, the air inlet hole 731, the rotating sleeve 732, the positioning pipe 733, the first connecting pipe 734, the air suction box 740, the air suction hole 741, the air passage pipe 750, the first air suction pipe 760, the first air suction hole 761, the second drying assembly 800, the second drying box 810, the second moving hole 820, the conveying belt 830, the moving box 840, the air outlet hole 841, the second connecting pipe 842, the air guide pipe 843, the second air suction pipe 850, the second air suction hole 851. DETAILED DESCRIPTION

[0048] The embodiments of the present application will be described in detail below with reference to the drawings.

[0049] As Figures 1-9 In the present embodiment, a water-resistant electrochemical aluminum production device comprises

[0050] The coating box 100 is provided with an inlet and outlet 200 on the left and right end side walls respectively.

[0051] Two partition plates 300 are fixedly connected in the coating box 100, and the partition plates 300 divide the coating box 100 into a coating chamber 400, a first drying chamber 410, and a second drying chamber 420. The partition plates 300 are provided with through holes 310 corresponding to the positions of the inlet and outlet 200.

[0052] Two coating rollers 500 are arranged in the coating chamber 400, and the outer circumferential walls of the coating rollers 500 are provided with mesh layers 510. The two coating rollers 500 are used for layered coating of paint.

[0053] Two paint boxes 520 are arranged on the side walls of the two coating rollers 500 in the coating chamber 400 respectively. The side walls of the paint boxes 520 are provided with paint ports 530, and the side walls of the coating rollers 500 extend into the paint boxes 520 through the paint ports 530.

[0054] Two pressing rollers 600 are respectively arranged above the two coating rollers 500 in a lifting manner;

[0055] Two scrapers 540 are arranged in the coating box 400, and the two scrapers 540 are used for scraping the excess coating on the mesh layer 510.

[0056] Four drying assemblies are arranged in the first drying chamber 400, one is arranged in the second drying chamber 410, and two are arranged in the third drying chamber 420. The two drying assemblies of the third drying chamber 420 are respectively located on the right side of the two coating rollers 500.

[0057] Among them, the four drying assemblies are used to provide different drying temperatures respectively.

[0058] The embodiment is implemented as follows:

[0059] In use, the polyester film is passed through the inlet and outlet 200 and the through hole 310, and then the coating roller 500 rotates to enable the mesh layer 510 to take out the coating in the coating box 520 and then scrape the excess coating by the scraper 540, so that the coating in the mesh layer 510 can be applied to the lower surface of the polyester film. The pressing roller 600 can make the polyester film adhere to the coating roller 500. The first coating roller 500 applies one-half layer of full water-based release coating on the polyester film, and then a drying assembly is used for drying treatment at a temperature of 80 degrees Celsius. The second coating roller 500 applies another one-half layer of full water-based release coating on the polyester film, and then a drying assembly is used for drying treatment at a temperature of 120 degrees Celsius. Then the drying assembly in the first drying chamber 410 is used for drying treatment at a temperature of 135 degrees Celsius, and the drying assembly in the second drying chamber 420 is used for drying treatment at a temperature of 100 degrees Celsius.

[0060] The application first applies one-half layer of full water-based release coating on the polyester film, removes part of the water after drying, and then applies another one-half layer of full water-based release coating, and then performs drying in stages, which can improve the drying effect and efficiency.

[0061] Compared with the prior art, the application has the advantages that the application can realize layered coating and drying in stages.

[0062] Please refer to Figure 2 , 6 The bottom of the coating chamber 400 is fixedly connected with a receiving pool 550, which is located directly below the two coating rollers 500. The receiving pool 550 can receive the coating dripping from the coating roller 500.

[0063] Please refer to Figure 1 , 2The upper end wall of the coating chamber 400 is fixedly connected with a lifting cylinder 620 corresponding to the position of the pressing roller 600. The output end of the lifting cylinder 620 is fixedly connected with a lifting plate 610. The pressing roller 600 is rotatably connected with the lifting plate 610. The lifting plate 610 is vertically moved by the lifting cylinder 620, and the pressing roller 600 is vertically moved by the lifting plate 610.

[0064] Please refer to Figure 2 、 3 , 4, 5, the drying assembly comprises a first drying assembly 700,

[0065] The first drying assembly 700 comprises:

[0066] A first drying box 710 is fixedly connected to the inner side wall of the coating box 100. The left and right end side walls of the first drying box 710 are respectively provided with first moving holes 720.

[0067] An air inlet box 730 is fixedly connected to the lower end wall of the first drying box 710 and penetrates the lower end wall. The end of the air inlet box 730 extending into the first drying box 710 is provided with an air inlet hole 731.

[0068] An air suction box 740 is fixedly connected to the upper end wall of the first drying box 710 and penetrates the upper end wall. The end of the air suction box 740 extending into the first drying box 710 is provided with an air suction hole 741.

[0069] By introducing hot air into the air inlet box 730, the hot air flows from the air inlet hole 731 on the air inlet box 730 into the first drying box 710 to dry the water-based release coating on the polyester film passing through the first moving hole 720. The air suction hole 741 on the air suction box 740 can suck away the dry air in the first drying box 710, achieving air pressure balance.

[0070] Please refer to Figure 2 、 3 , 4, 5, the front and rear side walls of the first drying box 710 are respectively fixedly connected with positioning pipes 733 penetrating the side walls. The ends of the two positioning pipes 733 extending into the first drying box 710 are rotatably connected with the two ports of a rotating sleeve 732. The positioning pipe 733 is in communication with the air inlet box 730 through a first connecting pipe 734. The rotating sleeve 732 is in contact with the surface of the polyester film to transfer heat.

[0071] The hot air can first flow into the rotating sleeve 732 through one positioning pipe 733, and then be sent to the air inlet box 730 through the other positioning pipe 733 and the first connecting pipe 734. After absorbing heat energy, the rotating sleeve 732 can transfer the heat energy to the polyester film, improving the drying effect.

[0072] Please refer to Figure 2 、 3, 4, 5, the first dry box 710 two sides of the outer wall is respectively fixedly connected with the first suction pipe 760, the first suction pipe 760 on the position corresponding to the first moving hole 720 has the first suction hole 761, the first suction pipe 760 is communicated with the suction box 740 through the air pipe 750 respectively;

[0073] In order to prevent the hot gas from the first moving hole 720 on the first dry box 710 out of the influence of the temperature in the coating box 100, through the first suction hole 761 on the first suction pipe 760 can suck the air out of the first moving hole 720, while the first suction pipe 760 is communicated with the suction box 740 through the air pipe 750;

[0074] In order to improve the suction effect, the number of the first suction pipe 760 can be multiple, which can be arranged on the upper and lower sides of the first moving hole 720.

[0075] Please refer to Figure 6 、 7 , 8, 9, the drying assembly comprises a second drying assembly 800,

[0076] The second drying assembly 800 comprises:

[0077] The second dry box 810 is fixedly connected to the inner side wall of the coating box 100, and the left and right end walls of the second dry box 810 are respectively provided with second moving holes 820;

[0078] The conveying belt 830 is arranged in the second dry box 810, and the second moving hole 820 is located between the upper end conveying surface and the lower end conveying surface of the conveying belt 830;

[0079] A plurality of moving boxes 840 are respectively fixedly connected to the opposite surfaces of the upper end conveying surface and the lower end conveying surface of the conveying belt 830, one side of the moving box 840 opposite to the conveying belt 830 is provided with a plurality of air outlet holes 841, and the adjacent moving boxes 840 are communicated through the second connecting pipe 842;

[0080] Among them, one of the moving boxes 840 in the upper end conveying surface of the conveying belt 830 and one of the moving boxes 840 in the lower end conveying surface are respectively provided with air guide pipes 843, the air guide pipes 843 penetrate through the second dry box 810, and are metal hoses.

[0081] It should be noted that the conveying belt of the conveying belt 830 of the present application is a high-temperature-resistant metal mesh;

[0082] The conveying belt 830 can drive the moving box 840 to reciprocate, so that the air outlet hole 841 on the moving box 840 can blow hot air on both sides of the polyester film, thereby realizing drying of the full-water release coating on the polyester film passing through the second moving hole 820, and the drying effect can be improved. The air guide pipe 843 in the application is a metal hose, which can adapt to the reciprocating movement of the moving box 840, and the second connecting pipe 842 can communicate the moving boxes 840 with each other.

[0083] Please refer to Figure 6 、 7 , 8, 9, the second drying assembly 800 further comprises:

[0084] A plurality of second air suction pipes 850 respectively penetrate the left and right end side walls of the second drying box 810 and are fixedly connected with the second drying box 810, the second air suction pipe 850 has a second air suction hole 851 extending into the second drying box 810 corresponding to the position of the polyester film;

[0085] In order to avoid a large amount of hot air flowing out from the second moving hole 820, the hot air rebounding on the polyester film after drying can be sucked away through the second air suction hole 851 on the second air suction pipe 850, thereby reducing the heat absorption flowing out from the second air suction hole 851 and affecting the temperature in the coating box 100.

[0086] A production process based on the production equipment of the water-resistant anodized aluminum, the specific steps are as follows:

[0087] The polyester film passes through the inlet and outlet 200 and the through hole 310, and then the coating roller 500 rotates to enable the mesh layer 510 to take out the paint in the paint box 520 and then scrape off the excess paint through the scraper 540, so that the paint in the mesh layer 510 can be applied to the lower surface of the polyester film, and the pressure roller 600 can enable the polyester film to tightly adhere to the coating roller 500. The first coating roller 500 coats one-half layer of full-water release coating on the polyester film, and then passes through an drying assembly to dry at a temperature of 80 degrees Celsius. The second coating roller 500 applies another one-half layer of full-water release coating on the polyester film, and then passes through a drying assembly to dry at a temperature of 120 degrees Celsius. Then the drying assembly in the first drying chamber 410 performs drying treatment at a temperature of 135 degrees Celsius, and the drying assembly in the second drying chamber 420 performs drying treatment at a temperature of 100 degrees Celsius.

[0088] The difference between the production process of the anodized aluminum in the application and the prior art is mainly the difference in the full-water release coating process, and the other steps are the same as the existing anodized aluminum production process.

[0089] The above merely is the preferred embodiment of the present application, it should be pointed out that, for ordinary skilled in the art, without departing from the inventive concept, can also make several variations and improvements, these all belong to the protection scope of the present application.

Claims

1. A water-resistant electroplated aluminum production equipment, characterized in that, include The coating box has inlets and outlets on its left and right side walls, respectively. Two partitions are fixedly connected inside the coating box. The partitions divide the coating box into a coating chamber, a first drying chamber, and a second drying chamber. The partitions have through holes at the positions of the inlet and outlet. Two coating rollers are arranged in the coating chamber. The outer circumferential wall of the coating roller has a textured layer. The two coating rollers are used to apply the coating in layers. Two paint boxes are respectively set on one side wall of two coating rollers in the coating chamber. The side wall of the paint box has a paint inlet, and the side wall of the coating roller extends into the paint box through the paint inlet. Two pressure rollers are positioned directly above the two coating rollers, and each roller can be raised or lowered. Two scrapers are placed inside the coating box; these two scrapers are used to scrape off excess paint from the textured layer. Four drying components are provided: one in the first drying chamber, one in the second drying chamber, and two in the third drying chamber. The two drying components in the third drying chamber are located to the right of the two coating rollers, respectively. The four drying components are used to provide different drying temperatures respectively; The drying assembly includes a first drying component. The first drying component includes: The first drying box is fixedly connected to the inner wall of the coating box, and the left and right side walls of the first drying box are respectively provided with first moving holes; An air inlet box is fixedly connected to and penetrates the lower end wall of the first drying box, and the end of the air inlet box that extends into the first drying box has an air inlet hole. An air intake box is fixedly connected to and penetrates the upper wall of the first drying box, and the end of the air intake box that extends into the first drying box has an air intake hole. Positioning tubes are fixedly connected to the front and rear side walls of the first drying box, respectively. One end of each positioning tube extends into the first drying box and is rotatably connected to the two ends of the rotating sleeve. One of the positioning tubes is connected to the air inlet box through the first connecting pipe. The rotating sleeve is in contact with the surface of the polyester film.

2. The water-resistant electroplated aluminum production equipment according to claim 1, characterized in that, The bottom of the coating chamber is fixedly connected to a receiving pool, which is located directly below the two coating rollers.

3. The water-resistant electroplated aluminum production equipment according to claim 2, characterized in that, A lifting cylinder is fixedly connected to the upper wall of the coating chamber at the position corresponding to the pressure roller. A lifting plate is fixedly connected to the output end of the lifting cylinder, and the pressure roller is rotatably connected to the lifting plate.

4. The water-resistant electroplated aluminum production equipment according to claim 3, characterized in that, The first air suction pipe is fixedly connected to the outer walls of both sides of the first drying box. The first air suction pipe has a first air suction hole at the position corresponding to the first moving hole. The first air suction pipe is connected to the air suction box through the air vent pipe.

5. A production process based on the water-resistant electroplated aluminum production equipment according to claim 4, characterized in that, The specific steps are as follows: The polyester film is passed through the inlet / outlet and through-hole. The coating roller rotates, allowing the textured layer to carry the paint out of the paint box. Excess paint is then scraped off by a scraper, allowing the paint in the textured layer to be applied to the lower surface of the polyester film. The pressure roller keeps the polyester film in close contact with the coating roller. The first coating roller applies half a layer of all-water-based release paint to the polyester film, which is then dried at 80 degrees Celsius by a drying unit. The second coating roller applies the other half layer of all-water-based release paint to the polyester film, which is then dried at 120 degrees Celsius by a drying unit. The drying unit in the first drying chamber dries the film at 135 degrees Celsius, and the drying unit in the second drying chamber dries the film at 100 degrees Celsius. The steps for using the first drying component as the drying component are as follows: hot air first flows into the rotating sleeve through a positioning tube, and then through another positioning tube and the first connecting pipe to the air inlet box. After absorbing heat energy, the rotating sleeve can transfer the heat energy to the polyester film. Hot air flows from the air inlet hole on the air inlet box into the first drying box to dry the all-water-based release coating on the polyester film that has passed through the first moving hole. The air inlet on the air suction box can suck away the dried air in the first drying box to achieve air pressure balance. The first air inlet on the first air suction pipe can suck away the air flowing out of the first moving hole. At the same time, the first air suction pipe and the air suction box are connected by a vent pipe.

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