Paint spraying processing technology after wire drawing

Abstract

The invention relates to the technical field of profile processing, in particular to a paint spraying processing technology after wiredrawing, which comprises the following processing steps: taking an aluminum material, wiredrawing the aluminum material through wiredrawing equipment, and removing part of an operation layer to obtain a base material with a wiredrawing layer on the surface; carrying out polishing treatment on the base material; carrying out pretreatment and passivation treatment on the base material; automatically spraying paint on the base material; carrying out curing treatment on the base material subjected to paint spraying treatment; attaching a protective film to the surface of the base material to obtain a wiredrawing finished product; according to the paint spraying processing technology after wiredrawing, the production steps can be simplified, the production process is more environmentally friendly, and the quality of the obtained wiredrawing finished product is better.

Description

Technical Field

[0001] The present application relates to the technical field of profile processing, and in particular to a post-wire drawing and painting processing technology. Background Art

[0002] Industrial aluminum has been widely used in the industrial field due to its excellent corrosion resistance, non-magneticity, processing convenience and good formability. In the production process of aluminum, the aluminum surface is often brushed to improve its corrosion resistance and appearance.

[0003] In the traditional aluminum wire drawing process, sandpaper is used to repeatedly rub the aluminum to scrape out part of the working layer, and each fine wire mark is clearly visible, so that a wire drawing layer is formed on the surface of the aluminum. After the wire drawing process, the aluminum will undergo a pickling process, chromization treatment and varnishing treatment in sequence, so that a dense chromate film is formed on the surface of the aluminum, and then a paint film is formed to obtain the finished product.

[0004] However, in actual application, the above-mentioned wire drawing process will cause the following situations: 1. As aluminum has a complex cross-sectional profile structure, operators need to use sandpaper or grinding tools to perform wire drawing on each outer wall and each groove surface one by one. The operation is cumbersome and the process is time-consuming, which is not conducive to improving the overall efficiency of aluminum processing; 2. Chromization of aluminum materials will be toxic to a certain extent, which will pose a health threat to production personnel and is not environmentally friendly; 3. The aluminum is dipped in paint. The uniformity of the paint on the aluminum is poor, which will affect the clarity of the brushed texture. Summary of the invention

[0005] In order to solve the problems existing in the prior art in the above-mentioned background technology, the present application provides a post-wire drawing painting processing technology, which can simplify the production steps, make the production process more environmentally friendly, and obtain a better quality of the finished wire drawing product.

[0006] The present application provides a post-drawing painting process, which adopts the following technical solutions: A post-drawing painting process includes the following processing steps: S1: taking an aluminum material, performing a wire drawing process on the aluminum material through a wire drawing device, removing part of the working layer, and obtaining a substrate having a wire drawing layer on the surface; S2: grinding the substrate; S3: performing pre-treatment and passivation treatment on the substrate; S4: Automatically spray-painting the substrate; S5: curing the substrate after the painting process; S6: attaching a protective film to the surface of the substrate to obtain a finished wire drawing product.

[0007] By adopting the above technical scheme, combined with multiple steps such as wire drawing, grinding, pretreatment, passivation, painting, curing and attaching protective film, the high quality and aesthetics of the aluminum surface are ensured. The steps are interconnected and work together to improve the final quality of the product. Compared with the prior art, the present application uses specific wire drawing equipment to perform wire drawing on the working layer, replacing the manual operation of the operator with a grinding tool, which can effectively improve the processing efficiency and better meet the production needs; compared with the prior art, the present application performs pretreatment and passivation on the substrate, which can remove oil and impurities on the surface of the substrate, and then re-form a dense layer. Oxide layer, this process does not involve the involvement of chromium salts, which detoxifies the production process and makes it more environmentally friendly, thus not posing a health threat to production personnel and better meeting production needs; the present application replaces the dipping paint treatment with a spray paint treatment, which can not only better control the distribution of the paint, thereby forming a more uniform, smooth, and thin coating on the surface of the substrate, making the brushed texture clearer and maintaining the texture effect of the brushed layer, but also better control the amount of paint sprayed, thereby saving costs, and at the same time enabling the paint particles to better adhere to the surface of the substrate, thereby enhancing the adhesion of the coating, which helps to improve the quality of the finished brushed product.

[0008] Preferably, in the processing step S2, the grinding process includes a first grinding and a second grinding, wherein the first grinding is used to smooth out the burrs on the upper surface of the substrate protruding from the surface of the brushed layer; the second grinding is used to grind the burrs at the junction of the upper surface of the substrate and the brushed layer.

[0009] By adopting the above technical solution, the first grinding can effectively remove the burrs on the upper surface of the substrate protruding from the surface of the brushed layer, thereby improving the surface flatness; the second grinding further processes the burrs at the junction of the upper surface of the substrate and the brushed layer to ensure a smooth transition at the junction. Through the refined treatment of the two grindings, the appearance quality of the substrate is greatly improved, providing a more ideal substrate surface for the subsequent painting step, thereby enhancing the bonding strength between the coating and the substrate, and reducing the risk of production personnel being scratched by burrs.

[0010] Preferably, after the processing step S3 and before the processing step S4, the upper surface and the wire drawing layer of the substrate are subjected to a third grinding treatment and air blowing to remove impurities, and the quality of the substrate is checked at the same time.

[0011] By adopting the above technical solution, the third grinding further refines the surface of the substrate, and the air blowing and impurity removal can ensure the surface cleanliness of the substrate before painting, providing good conditions for subsequent painting. In addition, through the quality inspection link, potential problems of the substrate can be discovered and dealt with in time to ensure the overall qualification rate of the product.

[0012] Preferably, in the processing step S3, the pretreatment includes: first removing dust on the surface of the substrate by clean water or an alkaline detergent, removing oil and an oxide layer on the surface of the substrate by a low-acid detergent, and then washing, neutralizing and drying the substrate after the acidification treatment.

[0013] By adopting the above-mentioned technical scheme, dust on the surface of the substrate is removed with the help of clean water or alkaline detergent to ensure the cleanliness of the substrate, providing a good foundation for subsequent processing. At the same time, oil stains and oxide layers are removed with the help of low-acid cleaning agents, which can further improve the surface quality of the substrate. In addition, the present application maintains the acid-base balance and dry state of the surface of the substrate through water washing, neutralization and drying after the acidification treatment, which is conducive to the subsequent painting treatment of the substrate.

[0014] Preferably, in the processing step S3, the passivation treatment is: immersing the substrate in a passivation solution containing an oxidant to form an oxide film on the surface of the substrate, and then washing and drying the substrate.

[0015] By adopting the above-mentioned technical scheme, the substrate is immersed in a passivation solution containing an oxidant to form an oxide film on its surface, which can effectively improve the corrosion resistance and wear resistance of the substrate. The subsequent washing and drying treatments ensure the purity and stability of the passivation film. The present application forms a protective layer on the surface of the substrate through passivation treatment, which can not only enhance the durability of the finished wire drawing product, but also provide a more stable base for subsequent painting treatment.

[0016] Compared with the chromium treatment of the prior art, both can improve the structural strength of the substrate itself, but the passivation treatment process of the present application does not involve the involvement of chromium salts, making the production process detoxified and more environmentally friendly, thus not posing a health threat to production personnel and better meeting production needs.

[0017] Preferably, in the processing step S4, a layer of primer is first sprayed on the substrate, and then a layer of topcoat is wet sprayed.

[0018] By adopting the above technical scheme, the primer is sprayed first, and the tiny bumps on the surface of the substrate can be filled first, which plays a role in improving the adhesion and flatness of the paint film. The wet spray topcoat further enhances the gloss and aesthetics of the paint film. At the same time, it can protect the primer layer from erosion by the external environment. The combination of primer and topcoat can improve the appearance quality of the product and enhance the protective performance of the product.

[0019] Preferably, in the processing step S5, the substrate is heated and cured by a curing furnace, wherein the curing treatment includes a first low-temperature curing zone, a high-temperature curing zone and a second low-temperature curing zone, and the substrate that has completed the painting treatment passes through the first low-temperature curing zone, the high-temperature curing zone and the second low-temperature curing zone in sequence.

[0020] By adopting the above technical scheme, the first low-temperature curing zone, the high-temperature curing zone and the second low-temperature curing zone together constitute a temperature gradient. The present application uses the temperature gradient to perform curing treatments at different temperatures on the substrate that has been spray-painted in sequence, so that the paint film can be efficiently cured. At the same time, problems such as cracking or deformation of the paint film caused by sudden temperature changes can be avoided, which helps to improve the curing quality of the paint film.

[0021] Preferably, in the processing step S6, the protective film is a PVC film.

[0022] By adopting the above technical scheme, the PVC protective film can provide protection for aluminum during transportation, installation and use, avoiding physical damage such as scratches and bumps, keeping its surface intact and more beautiful. At the same time, the PVC protective film has certain weather resistance and corrosion resistance, and can resist the erosion of environmental factors such as ultraviolet rays and acid rain, thereby helping to extend the service life of aluminum. At the same time, the PVC protective film also has the characteristics of easy tearing and no residual glue, so that users can easily remove it during use without causing secondary damage to the aluminum surface.

[0023] Preferably, in the processing step of S1, the wire drawing equipment includes a machine base, a transmission mechanism, a limiting mechanism, a first wire drawing mechanism and a second wire drawing mechanism. The transmission mechanism is arranged along the length direction of the machine base, and the aluminum material is placed on the transmission mechanism. The transmission mechanism is used to automatically transmit the aluminum material. The limiting mechanism, the first wire drawing mechanism and the second wire drawing mechanism are all arranged on the machine base, and the limiting mechanism is distributed on the top of the transmission mechanism. The limiting mechanism is used to limit the aluminum material arranged on the transmission mechanism. The first wire drawing mechanism is distributed on the top of the transmission mechanism. The first wire drawing mechanism is used to perform wire drawing on the front side of the aluminum material. The second wire drawing mechanisms are distributed on the outside of the transmission mechanism. The second wire drawing mechanism is used to perform wire drawing on the two opposite long side walls of the aluminum material.

[0024] By adopting the above technical solution, the transmission mechanism is set along the length direction of the machine base, which can realize the automatic transmission of aluminum materials, help improve the continuous operation capacity of the production line, reduce the time of manual handling and positioning, and thus improve the overall processing efficiency. With the cooperation of the limiting mechanism, the aluminum materials set on the transmission mechanism can be limited to prevent the aluminum materials from moving or deflecting during the processing, thereby improving the stability of aluminum processing. The first wire drawing mechanism is located on the top of the transmission mechanism, focusing on the wire drawing processing of the front side of the aluminum material, while the second wire drawing mechanism is distributed outside the transmission mechanism, responsible for drawing the two relatively long side walls of the aluminum material, so that multiple surfaces of the aluminum material can obtain uniform and high-quality wire drawing effects.

[0025] Preferably, the first wire drawing mechanism includes a fixed frame, a first wire drawing roller and a distance adjusting assembly, the fixed frame is fixed to the top surface of the machine base, and the fixed frame spans the transmission mechanism, the distance adjusting assembly is installed on the fixed frame, the first wire drawing roller is rotatably installed at the bottom of the distance adjusting assembly, and the distance adjusting assembly is used to adjust the distance between the first wire drawing roller and the top surface of the transmission mechanism.

[0026] By adopting the above technical solution, the fixed frame firmly mounts the first wire drawing mechanism on the top surface of the machine base, and the fixed frame spans the transmission mechanism, which helps to ensure structural stability during the wire drawing process, reduce vibration and deviation, and thus improve processing accuracy. The introduction of the distance adjustment component makes the distance between the first wire drawing roller and the top surface of the transmission mechanism adjustable, so as to adapt to the processing requirements of aluminum materials of different thicknesses, thereby enhancing the versatility and flexibility of the equipment. The first wire drawing roller is rotatably installed to make it in uniform contact with the surface of the aluminum material, and the precise adjustment of the distance adjustment component can achieve high-quality wire drawing effects, thereby improving the appearance and performance of the product.

[0027] In summary, the present application includes at least one of the following beneficial technical effects: 1. This application uses a specific wire drawing device to draw the working layer, replacing the manual work of operators using grinding tools, which can effectively improve the processing efficiency and better meet the production needs; 2. The present application performs pre-treatment and passivation treatment on the substrate, which can remove oil and impurities on the surface of the substrate and then re-form a dense oxide layer. This process does not involve the participation of chromium salts, making the production process detoxified and more environmentally friendly, thus not posing a health threat to production personnel and more in line with production needs; 3. This application uses spray painting instead of dipping paint to better control the distribution of paint, thereby forming a more uniform, smooth, and thin coating on the surface of the substrate, making the brushed texture clearer and maintaining the texture effect of the brushed layer. It can also better control the amount of paint sprayed, thereby saving costs. At the same time, the paint particles can better adhere to the surface of the substrate, thereby enhancing the adhesion of the coating and helping to improve the quality of the finished brushed product. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the wire drawing equipment in the embodiment of the present application.

[0029] Figure 2 It is a schematic diagram of the structure of the limiting mechanism in the embodiment of the present application.

[0030] Figure 3 It is a structural schematic diagram of the second wire drawing mechanism in the embodiment of the present application.

[0031] Figure 4 yes Figure 3 Exploded diagram.

[0032] Description of reference numerals: 1. wire drawing equipment; 2. machine base; 3. transmission mechanism; 31. transmission belt; 32. transmission roller; 4. limiting mechanism; 41. support frame; 42. auxiliary guide member; 421. telescopic rod; 4211. main rod; 4212. extension rod; 422. fixing plate; 423. connecting frame; 4231. connecting rod; 4232. frame; 424. buffer spring; 425. guide roller; 43. vertical limiting column; 5 , the first wire drawing mechanism; 51, the fixed frame; 52, the first wire drawing roller; 53, the distance adjustment component; 6, the second wire drawing mechanism; 61, the stepping drive component; 610, the driving motor; 611, the fixed seat; 612, the driving wheel; 613, the eccentric wheel; 614, the U-shaped rocker; 615, the ratchet; 616, the pawl; 617, the rotating shaft; 618, the first bevel gear; 619, the second bevel gear; 62, the second wire drawing roller; 7, the substrate. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-4 This application is described in further detail.

[0034] The embodiment of the present application discloses a post-wire drawing painting process.

[0035] Reference Figure 1 , a wire drawing and then painting process, comprising the following processing steps: S1: Take an aluminum material, perform wire drawing on the aluminum material through a wire drawing device, remove part of the working layer, and obtain a substrate 7 having a wire drawing layer on the surface.

[0036] In the processing step of S1, refer to Figure 1 and Figure 2The wire drawing equipment 1 includes a machine base 2, a transmission mechanism 3, a limiting mechanism 4, a first wire drawing mechanism 5 and a second wire drawing mechanism 6. The transmission mechanism 3 is arranged along the length direction of the machine base 2, and the aluminum material is placed on the transmission mechanism 3. The transmission mechanism 3 is used to automatically transmit the aluminum material, which helps to improve the continuous operation capacity of the production line and reduce the time of manual handling and positioning, thereby improving the overall processing efficiency. The limiting mechanism 4, the first wire drawing mechanism 5, and the second wire drawing mechanism 6 are all arranged on the machine base 2, and the limiting mechanism 4 is distributed on the top of the transmission mechanism 3, which can limit the aluminum material set on the transmission mechanism 3 to prevent the aluminum material from moving or deflecting during the processing process, thereby improving the stability of the aluminum material during processing. The first wire drawing mechanism 5 is distributed on the top of the transmission mechanism 3. The first wire drawing mechanism 5 is used to perform wire drawing on the front of the aluminum material. The second wire drawing mechanism 6 is distributed on the outside of the transmission mechanism 3. The second wire drawing mechanism 6 is used to perform wire drawing on the two opposite long side walls of the aluminum material, so that multiple surfaces of the aluminum material can obtain uniform and high-quality wire drawing effects.

[0037] Specifically, the present application does not specifically limit the specific structure of the transmission mechanism 3, but only requires that it has an automatic transmission function. In the present application, a preferred transmission mechanism 3 is provided, which is a mechanism that uses a motor as a power source and cooperates with a transmission belt 31 and a transmission roller 32. The transmission belt 31 is arranged along the length direction of the machine base 2, and the aluminum material is placed on the transmission belt 31. When the motor is started, the aluminum material can be automatically transmitted from the input end to the output end of the transmission belt 31.

[0038] In order to reduce the deviation of aluminum during transmission or drawing, refer to Figure 1 and Figure 2 The limiting mechanism 4 includes a support frame 41 and an auxiliary guide member 42. The support frame 41 is fixed on the machine base 2. The auxiliary guide member 42 includes a telescopic rod 421, a fixing plate 422, a connecting frame 423, a buffer spring 424 and a guide roller 425. The telescopic rod 421 includes a main rod 4211, an extension rod 4212 and a locking member. The main rod 4211 is vertically fixed on the support frame 41. The extension rod 4212 is slidably sleeved on the middle part of the bottom end of the main rod 4211. The locking member can be a locking screw. By adjusting the assembly length between the extension rod 4212 and the main rod 4211, the overall length of the telescopic rod 421 can be adjusted. Then, by tightening the locking screw, the extension rod 4212 and the main rod 4211 are fixedly connected.

[0039] The fixed plate 422 is fixed to the bottom end of the extension rod 4212 by welding. There are two connecting frames 423, which are respectively arranged at the two ends of the bottom surface of the fixed plate 422. The connecting frame 423 includes a connecting rod 4231 and a frame body 4232. The buffer spring 424 is sleeved on the outer wall of the connecting rod 4231. The bottom end of the connecting rod 4231 is fixed to the frame body 4232, and the top end is slidingly connected to the fixed plate 422. The two ends of the guide roller 425 are respectively rotationally connected to the frame body 4232 close to it. The rotating surface of the guide roller 425 abuts against the top surface of the aluminum material placed on the transmission mechanism 3, and the central axis of the guide roller 425 is perpendicular to the conveying direction of the aluminum material.

[0040] Furthermore, the limiting mechanism 4 also includes a vertical limiting column 43, which is a rubber column. The vertical limiting column 43 is fixed to the support frame 41 by bolt connection. The present application does not limit the number of vertical limiting columns 43. In the present application, four vertical limiting columns 43 can be provided, so that they are respectively arranged at the four corners of the fixed plate 422. At the same time, the distance between the bottom end of the vertical limiting column 43 and the conveyor belt 31 is slightly larger than the distance between the bottom end of the guide roller 425 and the conveyor belt 31.

[0041] When the transmission mechanism 3 is used to transport aluminum, the combination of the support frame 41 and the auxiliary guide member 42 constitutes a complete limiting mechanism 4, which can provide comprehensive limiting and guiding for the aluminum during the wire drawing process. Among them, the telescopic rod 421, the fixed plate 422, the connecting frame 423, the buffer spring 424 and the guide roller 425 in the auxiliary guide member 42 work together to not only provide the necessary buffering effect, but also ensure the accuracy of the guidance, thereby effectively reducing the vibration and deviation of the aluminum during the processing. Under the rotation of the guide roller 425, it can adapt to the slight changes in the surface of the aluminum material and always maintain a close contact with the top surface of the aluminum material, thereby ensuring the continuity and stability of the limiting effect. Under the action of the vertical limiting column 43, the maximum jumping wave of the aluminum material can be limited to ensure the stability and accuracy of the aluminum material during the processing.

[0042] In the present application, the aluminum material referred to is a plate structure having three processing surfaces, such as a rectangular plate, a rectangular cover plate, a rectangular cover plate with a groove on the side wall, or a rectangular plate with a groove on the side wall.

[0043] Reference Figure 1 The first wire drawing mechanism 5 includes a fixed frame 51, a first wire drawing roller 52 and a distance adjusting assembly 53. The fixed frame 51 is fixed on the top surface of the machine base 2, and the fixed frame 51 spans the transmission mechanism 3. The distance adjusting assembly 53 is installed on the fixed frame 51. The first wire drawing roller 52 is rotatably installed at the bottom of the distance adjusting assembly 53. The distance adjusting assembly 53 is used to adjust the distance between the first wire drawing roller 52 and the top surface of the transmission mechanism 3.

[0044] Among them, the distance adjusting component 53 can adopt the same structure as the auxiliary guide member 42 in the limiting mechanism 4, and the first wire drawing roller 52 replaces the guide roller 425, and the first wire drawing roller 52 is rotatably connected to the middle part of the fixed frame 51, and the central axis of the first wire drawing roller 52 is arranged parallel to the central axis of the guide roller 425. In addition, in order to realize the active energy wire drawing function of the first wire drawing roller 52 on the upper surface of the aluminum material, a rotating motor is also arranged on the side wall of the fixed frame 51, and the output end of the rotating motor is assembled with the end of the first wire drawing roller 52.

[0045] When in use, the fixing frame 51 firmly mounts the first wire drawing roller 52 on the top surface of the machine base 2, and the fixing frame 51 spans the transmission mechanism 3. The introduction of the distance adjusting component 53 makes the distance between the first wire drawing roller 52 and the top surface of the conveyor belt 31 adjustable, so as to adapt to the processing requirements of aluminum materials of different thicknesses, enhance the versatility and flexibility of the equipment, help to ensure the structural stability during the wire drawing process, reduce vibration and deviation, and thus improve the processing accuracy. The first wire drawing roller 52 is rotatably installed to make it in uniform contact with the surface of the aluminum material, and the precise adjustment of the distance adjusting component 53 can achieve high-quality wire drawing effects and enhance the appearance and performance of the product.

[0046] In the present application, the specific number of the first wire drawing mechanism 5 and the limiting mechanism 4 is not specifically limited. A preferred method is provided herein. The first wire drawing mechanism 5 and the limiting mechanism 4 are arranged at intervals along the length direction of the machine base 2. This can provide good processing stability for the aluminum material and effectively improve the processing efficiency of the upper surface of the substrate 7.

[0047] Reference Figure 3 and Figure 4 The second wire drawing mechanism 6 includes a stepping drive assembly 61 and a second wire drawing roller 62 , the output end of the stepping drive assembly 61 is assembled with the second wire drawing roller 62 , and the rotating surface of the second wire drawing roller 62 abuts against the side wall groove of the aluminum material placed on the transmission mechanism 3 .

[0048] Specifically, the stepping drive assembly 61 includes a fixed seat 611, a driving wheel 612, an eccentric wheel 613, a U-shaped rocker 614, a ratchet 615, a pawl 616, a rotating shaft 617, a first bevel gear 618, a second bevel gear 619 and a driving motor 610, wherein the fixed seat 611 is installed on the machine base 2, the driving motor 610 is arranged on the top surface of the fixed seat 611, the output end of the driving motor 610 is assembled with the driving wheel 612, the eccentric wheel 613 is fixed to the driving wheel 612 by bolt connection, and the ratchet 615 is rotatably connected to the fixed seat 611 on one side close to the conveyor belt 31 through the rotating shaft 617, and the U-shaped The rocker arm 614 is also fixed on the outer wall of the rotating shaft 617, so that the eccentric wheel 613 is movably connected to the middle part of the U-shaped rocker arm 614, and the pawl 616 is rotatably connected to the side wall of the U-shaped rocker arm 614. The pawl 616 is meshed with the teeth on the ratchet wheel 615. The first bevel gear 618 is assembled on the end of the rotating shaft 617 away from the U-shaped rocker arm 614, and the second bevel gear 619 is installed on the fixed seat 611 by an axial connection, so that the first bevel gear 618 is meshed with the second bevel gear 619. At the same time, the second drawing roller 62 is assembled on the same axis as the second bevel gear 619, and the rotating surface of the second drawing roller 62 is in contact with the side wall groove of the aluminum material placed on the transmission mechanism 3.

[0049] When in use, start the drive motor 610, the active wheel 612 can rotate, and at the same time drive the eccentric wheel 613 to rotate in the U-shaped rocker arm 614, the U-shaped rocker arm 614 drives the rotating shaft 617, the ratchet 615, the pawl 616, and the first bevel gear 618 to rotate simultaneously, synchronously, every time the eccentric wheel 613 rotates one circle in the U-shaped rocker arm 614, the pawl 616 transitions one tooth of the ratchet wheel 615, the first bevel gear 618 rotates one circle, and the second bevel gear 619 rotates one circle, which drives the second drawing roller 62 to complete a drawing action in the side wall groove of the aluminum material. During this process, the drive motor 610 can provide a stable and accurate driving force to ensure that the second wire drawing roller 62 rotates at a predetermined speed and trajectory, thereby improving the accuracy and efficiency of the wire drawing process. The rotating surface of the second wire drawing roller 62 abuts against the side wall groove of the aluminum material, so that the second wire drawing mechanism 6 can adapt to aluminum materials of different specifications and shapes. The precise wire drawing process of the side wall groove of the aluminum material by the second wire drawing mechanism 6 ensures the comprehensiveness and consistency of the wire drawing process, which can effectively improve the quality and aesthetics of the aluminum material.

[0050] Compared with the prior art, the present application uses the first wire drawing mechanism 5 and the second wire drawing mechanism 6 to perform wire drawing processing on each surface of the aluminum material, which has a higher degree of automation and avoids repeated manual wiping of the aluminum material with scouring pads, sandpaper and other grinding tools, which can effectively save manpower and material resources, reduce labor intensity, and improve production efficiency. The friction frequency and friction trajectory of the second wire drawing roller 62 can also be controlled by means of the stepping drive component 61, thereby effectively improving the wire drawing effect in the groove on the side wall of the substrate 7.

[0051] The present application provides a preferred second wire drawing roller 62 of a columnar structure, and the second wire drawing roller 62 is fixed on the same axis as the second bevel gear 619, and the rotating surface of the second wire drawing roller 62 abuts against the side wall groove of the aluminum material placed on the transmission mechanism 3. When used, the second bevel gear 619 rotates, driving the shaft inside it to rotate, thereby driving the second wire drawing roller 62 to rotate, and the second wire drawing roller 62 rubs in the groove to obtain wire drawing; the present application provides another preferred second wire drawing roller 62 of a spherical structure, and the second wire drawing roller 62 is rotatably connected to the same axis as the second bevel gear 619, and the rotating surface of the second wire drawing roller 62 abuts against the side wall groove of the aluminum material placed on the transmission mechanism 3. When used, the second bevel gear 619 rotates, driving the shaft inside it to rotate, thereby driving the second wire drawing roller 62 to rotate, and the second wire drawing roller 62 rubs in the groove to obtain wire drawing. Compared with the two, the second wire drawing roller 62 of the latter is more flexible and adaptable.

[0052] Compared with the prior art, the present application uses specific wire drawing equipment to perform wire drawing on the working layer, replacing the manual operation of operators using grinding tools, which can effectively improve processing efficiency and better meet production needs.

[0053] S2: performing a grinding process on the substrate 7.

[0054] In the processing step S2, the grinding treatment includes the first grinding and the second grinding, wherein the first grinding is used to smooth the burrs on the upper surface of the substrate 7 protruding from the surface of the brushed layer to improve its surface flatness; the second grinding is used to grind the burrs at the junction of the upper surface of the substrate 7 and the brushed layer to ensure a smooth transition at the junction. Through the refined treatment of the two grindings, the risk of production personnel being scratched by burrs can be reduced, and at the same time, the appearance quality of the substrate 7 can be greatly improved, providing a more ideal substrate 7 surface for the subsequent painting step, thereby enhancing the bonding between the coating and the substrate 7.

[0055] In the present application, the tool used for grinding the substrate 7 is not specifically limited, but the fineness of the second grinding is required to be greater than that of the first grinding, so as to ensure that the burrs on the surface of the substrate 7 are basically cleaned and the structure of the substrate 7 itself is not damaged. Here, an automatic grinder can be selected to grind the substrate 7 for the first time, which can achieve the purpose of rapid grinding and improve production efficiency; a manual grinder or sandpaper and other tools can be selected to grind the substrate 7 for the second time, which can achieve the purpose of saving costs and a wider grinding range, and improve production quality.

[0056] S3: performing pre-treatment and passivation treatment on the substrate 7.

[0057] In the present application, the pre-treatment steps referred to include: first removing dust on the surface of the substrate 7 by clean water or alkaline detergent, then removing oil and oxide layer on the surface of the substrate 7 by low-acid cleaning agents such as oxalic acid, and then washing, neutralizing and drying the acidified substrate 7.

[0058] Specifically, dust on the surface of the substrate 7 is removed with the help of clean water or alkaline detergent to ensure the cleanliness of the substrate 7 and provide a good foundation for subsequent processing. At the same time, oil stains and oxide layers are removed with the help of low-acid cleaning agents, which can further improve the surface quality of the substrate 7. In addition, the present application maintains the acid-base balance and dry state of the surface of the substrate 7 through water washing, neutralization and drying after the acidification treatment, which is beneficial to the subsequent painting treatment of the substrate 7.

[0059] Compared with the prior art of using high-acid cleaners to clean aluminum, the present application uses low-acid cleaners to remove oil and oxide layers attached to the surface of the aluminum, thereby reducing corrosion to the aluminum and thus reducing damage to the aluminum body; at the same time, the low-acid cleaner produces less irritating odor and harmful gases during use, is less harmful to operators and the environment, is safer to use, and meets environmental protection requirements; at the same time, although the reaction speed of the low-acid cleaner may be slightly slower than that of the high-acid cleaner, the low-acid cleaner can also achieve efficient and thorough cleaning effects, and the low-acid cleaner has better wettability and permeability, thereby being able to more deeply remove dirt and oxides on the surface of the aluminum.

[0060] In the present application, the passivation treatment steps are: immersing the substrate 7 in a passivation solution containing an oxidant to form an oxide film on the surface of the substrate 7, followed by water washing and drying.

[0061] Immersing the substrate 7 in a passivation solution containing an oxidant to form an oxide film on its surface can effectively improve the corrosion resistance and wear resistance of the substrate 7. The subsequent washing and drying treatments ensure the purity and stability of the passivation film. The present application forms a protective layer on the surface of the substrate 7 through passivation treatment, which can not only enhance the durability of the finished wire drawing product, but also provide a more stable base for subsequent painting treatment.

[0062] The passivation treatment of the present application is an oxidation treatment for removing chromium. Compared with the chromium treatment of the prior art, both can achieve the goal of improving the structural strength of the substrate 7 itself, but the passivation treatment process of the present application does not involve the involvement of chromium salts, thereby detoxifying the production process and making it more environmentally friendly, thereby not posing a health threat to production personnel and better meeting production needs.

[0063] After the processing step S3 and before the processing step S4, the upper surface and the brushed layer of the substrate 7 are subjected to a third grinding treatment and air blowing to remove impurities. The third grinding further refines the surface of the substrate 7, and air blowing to remove impurities can ensure the surface cleanliness of the substrate 7 before painting, providing good conditions for subsequent painting. At the same time, the quality of the substrate 7 is checked, and potential problems of the substrate 7 can be discovered and dealt with in time, ensuring the overall qualified rate of the product.

[0064] S4: Automatically spray-painting the substrate 7.

[0065] In the processing step S4, a layer of primer is first sprayed on the substrate 7, and then a layer of topcoat is wet sprayed. In this process, the tool for spraying the substrate 7 is not specifically limited, but it is necessary to ensure that the paint forms an atomized state when sprayed, has a certain fluidity and does not agglomerate, and ensure that the paint maintains a uniform speed during the entire spraying process, so that the paint forms a paint film of approximately the same thickness in various areas on the surface of the substrate 7.

[0066] In the present application, by spraying the primer first, the tiny bumps on the surface of the substrate 7 can be filled first, which can improve the adhesion and flatness of the paint film. The wet spray topcoat can further enhance the gloss and aesthetics of the paint film and protect the primer layer from erosion by the external environment.

[0067] The present application uses spray painting to replace the dipping process, which can not only better control the distribution of paint, thereby forming a more uniform, smooth, and thin coating on the surface of the substrate 7, making the brushed texture clearer and maintaining the texture effect of the brushed layer, but also better control the amount of paint sprayed, which plays a role in saving costs, and at the same time enables the paint particles to better adhere to the surface of the substrate 7, thereby enhancing the adhesion of the coating and helping to improve the quality of the finished brushed product. S5: Curing the painted substrate 7.

[0068] In the processing step S5, the substrate 7 is heated and cured by a curing furnace, wherein the curing treatment includes a first low-temperature curing zone, a high-temperature curing zone and a second low-temperature curing zone, and the substrate 7 that has completed the painting treatment passes through the first low-temperature curing zone, the high-temperature curing zone and the second low-temperature curing zone in sequence.

[0069] In the embodiment of the present application, a preferred curing method is listed to cure the substrate 7 that has been spray-painted. Specifically, the first low-temperature curing zone first preheats the substrate 7 that has just entered the curing furnace at 100°C-150°C for 8-12 minutes; the high-temperature curing zone heats and cures the substrate 7 that has completed the preheating treatment at 200°C-205°C for 10-15 minutes; the second low-temperature curing zone cools the substrate 7 that has completed the heating and curing treatment at 100°C-150°C for 8-12 minutes. The first low-temperature curing zone, the high-temperature curing zone, and the second low-temperature curing zone together constitute a temperature gradient. The present application uses a temperature gradient to sequentially cure the substrate 7 that has completed the spray-painting treatment at different temperatures, so that the paint film can be efficiently cured. At the same time, problems such as cracking or deformation of the paint film caused by sudden temperature changes can be avoided, which helps to improve the curing quality of the paint film.

[0070] S6: A protective film is attached to the surface of the substrate 7 to obtain a finished wire drawing product.

[0071] Specifically, the protective film is a PVC film. The PVC protective film can provide protection for aluminum during transportation, installation and use, preventing it from physical damage such as scratches and bumps, keeping its surface intact and more beautiful. At the same time, the PVC protective film has certain weather resistance and corrosion resistance, and can resist the erosion of environmental factors such as ultraviolet rays and acid rain, thereby helping to extend the service life of aluminum. At the same time, the PVC protective film also has the characteristics of easy tearing and no residual glue, so that users can easily remove it during use without causing secondary damage to the aluminum surface.

[0072] In this application, multiple steps such as wire drawing, grinding, pretreatment, passivation, painting, curing and attaching a protective film are combined to ensure the high quality and aesthetics of the aluminum surface. The steps are interconnected and work together to improve the final quality of the product.

[0073] The above are all preferred embodiments of the present application. The embodiments are only explanations of the present application and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A wire drawing and then painting process, characterized in that: The processing steps include: S1: taking an aluminum material, and performing a wire drawing process on the aluminum material through a wire drawing device (1), removing part of the working layer, and obtaining a substrate (7) having a wire drawing layer on the surface; S2: performing a grinding process on the substrate (7); S3: performing pre-treatment and passivation treatment on the substrate (7); S4: automatically spray-painting the substrate (7); S5: performing a curing treatment on the substrate (7) after the painting treatment; S6: attaching a protective film to the surface of the substrate (7) to obtain a finished wire drawing product.

2. A wire drawing and then painting process according to claim 1, characterized in that: In the processing step S2, the grinding process includes a first grinding and a second grinding, wherein the first grinding is used to smooth out the burrs on the upper surface of the substrate (7) protruding from the surface of the brushed layer; and the second grinding is used to grind the burrs at the junction of the upper surface of the substrate (7) and the brushed layer.

3. The post-painting process according to claim 1, characterized in that: After the processing step S3 and before the processing step S4, the upper surface and the wire drawing layer of the substrate (7) are subjected to a third grinding treatment and air blowing to remove impurities, and the quality of the substrate (7) is checked at the same time.

4. The post-painting process according to claim 1, characterized in that: In the processing step S3, the pretreatment includes: firstly removing dust from the surface of the substrate (7) by using clean water or an alkaline detergent, removing oil stains and an oxide layer on the surface of the substrate (7) by using a low-acid cleaning agent, and then washing, neutralizing, and drying the substrate (7) after the acidification treatment.

5. A post-painting process according to any one of claims 1-4, characterized in that: In the processing step S3, the passivation treatment is: immersing the substrate (7) in a passivation solution containing an oxidant to form an oxide film on the surface of the substrate (7), followed by water washing and drying.

6. A post-painting process according to claim 5, characterized in that: In the processing step S4, a layer of primer is first sprayed on the substrate (7), and then a layer of topcoat is wet sprayed.

7. The post-painting process according to claim 5, characterized in that: In the processing step S5, the substrate (7) is heated and cured by a curing furnace, wherein the curing treatment includes a first low-temperature curing zone, a high-temperature curing zone, and a second low-temperature curing zone, and the substrate (7) that has completed the painting treatment passes through the first low-temperature curing zone, the high-temperature curing zone, and the second low-temperature curing zone in sequence.

8. The post-painting process according to claim 5, characterized in that: In the processing step S6, the protective film is a PVC film.

9. The post-painting process according to claim 1, characterized in that: In the processing step S1, the wire drawing equipment (1) comprises a machine base (2), a transmission mechanism (3), a limiting mechanism (4), a first wire drawing mechanism (5) and a second wire drawing mechanism (6); the transmission mechanism (3) is arranged along the length direction of the machine base (2); the aluminum material is placed on the transmission mechanism (3); the transmission mechanism (3) is used to automatically transmit the aluminum material; the limiting mechanism (4), the first wire drawing mechanism (5) and the second wire drawing mechanism (6) are all arranged on the machine base (2); and the limiting mechanism (4) is distributed on the top of the transmission mechanism (3); the limiting mechanism (4) is used to limit the aluminum material arranged on the transmission mechanism (3); the first wire drawing mechanism (5) is distributed on the top of the transmission mechanism (3); the first wire drawing mechanism (5) is used to perform wire drawing on the front side of the aluminum material; the second wire drawing mechanism (6) is distributed on the outside of the transmission mechanism (3); and the second wire drawing mechanism (6) is used to perform wire drawing on the two opposite long side walls of the aluminum material.

10. A post-drawing painting process according to claim 9, characterized in that: The first wire drawing mechanism (5) comprises a fixed frame (51), a first wire drawing roller (52) and a distance adjusting component (53); the fixed frame (51) is fixed on the top surface of the machine base (2), and the fixed frame (51) spans the transmission mechanism (3); the distance adjusting component (53) is installed on the fixed frame (51); the first wire drawing roller (52) is rotatably installed at the bottom of the distance adjusting component (53); and the distance adjusting component (53) is used to adjust the distance between the first wire drawing roller (52) and the top surface of the transmission mechanism (3).

Images