Ink loading device for inkjet processing of mobile phone back plate and loading method thereof

Abstract

The application discloses a mobile phone back plate inkjet processing ink feeding device and a feeding method thereof, which comprises a storage tank, the bottom end of the storage tank is fixedly connected with a discharge port, the upper portion of the inner cavity of the storage tank is provided with a feeding assembly, the left and right sides of the top end of the feeding assembly are both provided with extension ear plates, the extension ear plates are connected between the feeding assembly and an external rack, the bottom end of the feeding assembly is fixedly connected with a discharging assembly, the bottom end of the discharging assembly is provided with a self-cleaning assembly, the inner side of the storage tank is movably sleeved with a rubber ring, the bottom end of the rubber ring is fixedly connected with a scraping ring, the rubber ring is displaced up and down relative to the storage tank, the outer side of the scraping ring is in close contact with the inner side of the storage tank, the inner side of the rubber ring is provided with an annular groove, the other end of the self-cleaning assembly is movably connected with the annular groove, and the self-cleaning assembly is rotated relative to the annular groove. The application can avoid ink stratification and significantly improve the inkjet quality.

Description

Technical Field

[0001] This invention belongs to the field of inkjet processing technology, specifically an ink feeding device and method for inkjet processing of mobile phone back panels. Background Technology

[0002] With the continuous development of smartphones, more and more manufacturers are adding various patterns to the back panels of their phones. Most of these patterns are manufactured using inkjet printing. Inkjet technology for phone back panels primarily utilizes UV inkjet printing to coat one or more layers of ink onto the phone's glass panel or cover, creating an optical shielding layer or other decorative effects. UV inkjet printing uses UV light (ultraviolet light) to simultaneously print and cure the ink instantly, eliminating the need for additional drying time and achieving a "print and dry" effect. Throughout the inkjet process, ink needs to be added to the ink tank, requiring an ink feeding device.

[0003] Conventional ink feeding devices mainly consist of a fixed ink tank and a discharge port at the bottom. In use, ink is injected into the ink tank through the feed pipe, and the discharge port at the bottom is opened to spray the ink out when needed. Although this feeding method is relatively simple, this type of ink feeding device relies solely on the flow of ink at the feed pipe to feed the ink. At this time, most of the ink is in a static state. Since the resin, solvent, pigment, and additives in UV ink have different specific gravities, prolonged static standing will cause the components in the ink to separate, which will seriously affect the quality of inkjet printing.

[0004] Because the patterns on the back of mobile phones are quite complex, existing technologies typically require different inks to be used after inkjet printing with one type of ink. Since inks have a certain degree of adhesion, and to prevent inks from mixing, the ink tank needs to be cleaned before the next ink loading. This is usually done using a high-pressure water gun combined with brushing, which takes a long time, is inefficient, and requires a large amount of water. Improvements are urgently needed. Summary of the Invention

[0005] One object of the present invention is to solve at least the above-mentioned problems and to provide at least the advantages that will be described later.

[0006] Another objective of this invention is to provide an ink feeding device and method for inkjet processing of mobile phone back panels, which improves inkjet quality, cleaning efficiency, and water conservation.

[0007] To achieve the above objectives and some other objectives, the present invention adopts the following technical solution:

[0008] A device and method for feeding ink for inkjet printing on mobile phone back panels includes: a storage tank, the bottom of which is fixedly connected to an outlet; a feeding assembly is provided above the inner cavity of the storage tank; extension ear plates are installed on both the left and right sides of the top of the feeding assembly; the extension ear plates are connected to an external frame; a discharge assembly is fixedly connected to the bottom of the feeding assembly; a self-cleaning assembly is installed at the bottom of the discharge assembly; a rubber ring is movably fitted onto the inner side of the storage tank; a scraper ring is fixedly connected to the bottom of the rubber ring; the rubber ring moves vertically relative to the storage tank; the outer side of the scraper ring is in close contact with the inner side of the storage tank; an annular groove is formed on the inner side of the rubber ring; the other end of the self-cleaning assembly is movably engaged with the annular groove; and the self-cleaning assembly rotates relative to the annular groove.

[0009] The feeding assembly includes a fixed tank, the left and right sides of the top of the fixed tank are connected to the extension ear plate, the bottom of the fixed tank is fixedly connected to the extension tank, the bottom of the extension tank is movably sleeved with a movable tank, the movable tank rotates relative to the extension tank, the extension tank and the movable tank are internally connected, the left end of the fixed tank is fixedly connected to the feeding pipe, and the feeding pipe is connected to the external conveying pipe.

[0010] The discharge assembly includes an adjusting pipe, the top end of which is fixedly connected to the bottom end of the movable tank. The top end of the adjusting pipe has a through hole and is connected to the bottom end of the movable tank. A discharge valve is fixedly connected to the right side of the adjusting pipe near the top end, and a drain valve is fixedly connected to the left side of the adjusting pipe near the bottom end.

[0011] The self-cleaning component includes a guide block that is movably engaged with an annular groove and rotates relative to the annular groove. The self-cleaning component also includes a movable plate located in the middle of the storage tank. The middle part of the top of the movable plate is connected to the bottom end of the discharge component, and a sealing plug is fixedly connected to the bottom end of the movable plate.

[0012] When in use, the discharge port should correspond to the inkjet head during inkjet processing, and the storage tank should be fixed to the external frame. At the same time, the corresponding UV ink and clean water should be prepared and selectively connected to the feed pipe through the external feed pipe, and ensure that the incoming ink or clean water has a certain pressure. If the pressure is insufficient, the pressure can be increased through the pressure booster valve to complete the preparation before feeding.

[0013] Preferably, the right side of the fixed tank is fixedly connected to a curved pipe symmetrical to the feed pipe, and the other end of the curved pipe is connected to the right side of the extension tank. The front and rear sides of the movable tank near the bottom are fixedly connected to feed troughs, and the feed troughs are connected to the regulating pipe.

[0014] Preferably, the bottom end of the main shaft passes through the bottom end of the fixed tank and is connected to the bottom end of the inner cavity of the movable tank. The movable tank rotates with the main shaft, and an impeller located inside the fixed tank is fixedly sleeved on the outer side of the main shaft.

[0015] When ink needs to be filled, the external feed pipe and the feed pipe can be connected, and ink can be injected into the fixed tank at the same time. At this time, the ink can enter the extended tank through the bent pipe at the right end of the fixed tank and then enter the movable tank. It can also enter the regulating pipe through the feed chute. After entering the regulating pipe, it can be discharged through the discharge valve on the side, thus completing the ink filling process.

[0016] Simultaneously, when ink enters the fixed tank, it drives the impeller to rotate. The impeller rotates and drives the main shaft to rotate, causing the movable tank to rotate relative to the extended tank and drive the adjustment tube at the bottom to rotate. When the adjustment tube rotates, it can synchronously drive the movable rod to rotate. At this time, the discharge valve can evenly inject ink into the storage tank while rotating. At the same time, the movable rod can drive the self-cleaning component to rotate relative to the annular groove, thereby agitating the ink inside the storage tank and preventing it from settling and separating.

[0017] By utilizing the flow of ink during the ink injection process, the rapid flow of ink causes the discharge valve to rotate, allowing it to change the injection position and achieve uniform ink injection. At the same time, the rotation of the self-cleaning component agitates the ink injected into the storage tank. This effectively avoids the problem of ink stratification caused by the fixed injection position in traditional devices, which affects the inkjet effect. It can significantly reduce the possibility of ink stratification, and the entire process is completed automatically, significantly improving inkjet quality.

[0018] Preferably, a limiting groove is provided on both the front and rear sides of the inner cavity of the regulating tube, a limiting plate is movably sleeved inside the regulating tube, the outer side of the limiting plate is movably engaged with the limiting groove, and a movable rod is fixedly connected to the bottom end of the limiting plate. The bottom end of the movable rod passes through the bottom end of the regulating tube and is connected to the top end of the movable plate.

[0019] Preferably, when the limiting spring is in its initial state, the top end of the limiting plate is located below the output end of the discharge valve. When the limiting spring is in its ultimate tension state, that is, when the bottom end of the limiting plate is in contact with the bottom end of the inner cavity of the regulating pipe, the top end of the limiting plate is located below the output end of the drain valve.

[0020] Before injecting different inks after a single ink injection, clean water can be injected into the feed tube. The clean water can also drive the spindle to rotate and the regulating tube to rotate. While injecting clean water, the discharge valve can be kept closed. Due to the pressure of the clean water and the continuous injection of clean water, the limit spring is stretched, and the limit plate moves down under pressure, which in turn moves the bottom movable rod down. When the limit spring is stretched to its limit position, the bottom end of the limit plate contacts the bottom end of the regulating tube cavity, and the clean water is then discharged through the drain valve and enters the interior of the storage tank to assist in cleaning the interior of the storage tank.

[0021] Preferably, a first fixed seat is fixedly connected to the end of the guide block away from the annular groove, and a second fixed seat is fixedly connected to the top of the movable plate near the outer side. A connecting rod is movably connected between the first fixed seat and the second fixed seat through a rotating shaft.

[0022] Preferably, a cleaning brush is fixedly installed at the bottom end of the connecting rod, a limiting inclined plate is fixedly connected to the bottom end of the first fixed seat, and the diameter of the sealing plug is adapted to the inner diameter of the discharge port.

[0023] Preferably, when the bottom end of the cleaning brush contacts the bottom end of the inner cavity of the storage tank, the bottom end of the connecting rod contacts the top end of the limiting inclined plate, and the sealing plug is movably sleeved with the discharge port and completely blocks the bottom end of the discharge port.

[0024] When water is injected, the movable rod moves downward, causing the movable plate to move downward. The movable plate then moves downward relative to the first fixed seat, and the connecting rod deflects diagonally downward until the bottom end of the connecting rod contacts the top end of the limiting inclined plate. At this point, the deflection of the connecting rod is limited. As the movable rod continues to move downward, the rubber ring is pushed downward, causing the scraper ring at the bottom end to move downward. The scraper ring then rubs against the inner wall of the storage tank and scrapes away the inner wall. The scraped residue mixed with water can be discharged through the outlet.

[0025] As the scraper ring descends to the bottom of the storage tank, its displacement is restricted. At this point, the cleaning brush comes into contact with the bottom of the storage tank. Since the water also drives the self-cleaning component to rotate, the cleaning brush rotates relative to the ring groove, thus assisting in scraping and cleaning the bottom of the storage tank.

[0026] By selectively injecting clean water or ink, the self-cleaning component automatically rotates during cleaning, and the scraper ring moves downward to scrape the inner wall of the storage tank. At the same time, the cleaning brush is deflected, making it fit tightly against the bottom of the storage tank. Combined with the rotation of the self-cleaning component, the cleaning process of the inner wall of the storage tank is automatically completed, avoiding the cumbersome brushing process of traditional devices. Only clean water needs to be injected to automatically complete the brushing process, significantly improving cleaning efficiency.

[0027] Meanwhile, during the cleaning process, before the scraper ring descends to its lowest point, the sealing plug is not in contact with the outlet. The scraped ink mixes with the clean water and is discharged directly through the outlet. However, when the cleaning brush is pressed tightly against the bottom of the storage tank, the sealing plug completely blocks the outlet. At this point, the rotation of the connecting rod and the cleaning brush can mix the scraped ink with the clean water. The sealing plug prevents water from being discharged, and the rotation of the connecting rod can quickly agitate the water flow, assisting in completing the cleaning process.

[0028] By reusing the pressure of the injected water, the cleaning brush can prevent water from flowing out when cleaning the bottom of the storage tank, thus avoiding the waste of water during large-scale rinsing. Instead, it uses water agitation to assist in the cleaning process, minimizing water waste and reducing cleaning time, thereby shortening the overall loading time.

[0029] The ink feeding method for an ink feeding device used in inkjet printing of mobile phone back panels includes the following steps:

[0030] S1: When feeding ink, ink can be fed into the feed pipe through the external feed pipe. At this time, the ink will enter the extended tank and the movable tank through the fixed tank and the bend pipe, and be introduced into the regulating pipe through the feed trough. Finally, it will be discharged through the discharge valve and injected into the storage tank.

[0031] S2: When ink enters the fixed tank, it drives the impeller to rotate and drives the main shaft to rotate. At this time, the movable tank and the regulating tube rotate accordingly, which can also drive the self-cleaning component at the bottom to rotate. The self-cleaning component rotates relative to the annular groove to stir the ink inside the storage tank and prevent stratification.

[0032] S3: When the ink injection is completed and a second ink injection is required, clean water can be injected into the fixed tank through the external water supply pipe while keeping the discharge valve closed. At this time, the clean water enters the regulating pipe and drives the limit plate to move down until the limit spring is stretched to its limit. Then the clean water can be discharged from the drain valve and enter the storage tank.

[0033] S4: When the movable rod moves down, the movable plate moves down accordingly, and the connecting rod deflects until it reaches its limit position. The continued downward movement of the movable rod can drive the scraper ring to move down, which can then scrape the inner wall of the storage tank until the cleaning brush contacts the bottom of the inner cavity of the storage tank. At this time, the rotation of the self-cleaning component can scrape the bottom of the inner cavity of the storage tank. At the same time, the sealing plug can temporarily block the output of the outlet until the cleaning of the inside of the storage tank is completed and all the water is drained, so that the secondary ink loading process can begin.

[0034] The present invention has at least the following beneficial effects:

[0035] 1. Compared with existing ink feeding devices and methods for inkjet printing of mobile phone back panels, this ink feeding device and method utilizes the flow of ink during injection. The rapid flow of ink causes the discharge valve to rotate, allowing it to change the injection position and achieve uniform injection. Simultaneously, the rotation of the self-cleaning component agitates the ink injected into the storage tank. This effectively avoids the problem of ink stratification caused by the fixed injection position in traditional devices, which affects the inkjet printing effect. It significantly reduces the possibility of ink stratification, and the entire process is completed automatically, significantly improving inkjet printing quality.

[0036] 2. Compared with existing ink feeding devices and methods for inkjet printing of mobile phone back panels, this ink feeding device and method selectively injects water or ink. During cleaning, the injection of ink causes the self-cleaning component to rotate automatically, and the scraper ring moves downward to scrape the inner wall of the storage tank. At the same time, the cleaning brush can be deflected to fit against the bottom of the storage tank. Combined with the rotation of the self-cleaning component, the cleaning process of the inner wall of the storage tank can be automatically completed. This avoids the cumbersome brushing process of traditional devices. Only water needs to be injected to automatically complete the brushing process, which significantly improves the cleaning efficiency.

[0037] 3. Compared with existing ink feeding devices and methods for inkjet printing of mobile phone back panels, this type of ink feeding device and method for mobile phone back panel inkjet printing uses the pressure of water injection to prevent water from flowing out when the cleaning brush cleans the bottom of the storage tank, thus avoiding the waste of water during large-scale rinsing. Instead, it uses water agitation to assist in the cleaning process, minimizing water waste and reducing cleaning time, thereby shortening the overall feeding time.

[0038] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0040] Figure 2 This is a cross-sectional schematic diagram of the internal structure of the storage tank of the present invention;

[0041] Figure 3 This is a schematic diagram of the hidden storage tank state of the present invention;

[0042] Figure 4 This is a schematic diagram showing the fit between the feeding assembly and the extended ear plate structure of the present invention;

[0043] Figure 5 This is a separate cross-sectional schematic diagram of the feeding assembly of the present invention;

[0044] Figure 6 This is a partial structural schematic diagram of the feeding assembly of the present invention;

[0045] Figure 7 This is a separate cross-sectional schematic diagram of the material discharge assembly of the present invention;

[0046] Figure 8 This is a partial structural schematic diagram of the material discharge assembly of the present invention;

[0047] Figure 9 This is an exploded view of the structure of the annular groove and self-cleaning component of the present invention;

[0048] Figure 10 This is a separate schematic diagram of the self-cleaning component structure of the present invention;

[0049] Figure 11 This is an exploded view of the structure of the self-cleaning component of the present invention;

[0050] Figure 12 for Figure 11 An enlarged schematic diagram of the structure at point A in the middle. Detailed Implementation

[0051] The present invention will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can implement it after consulting this specification.

[0052] like Figures 1 to 12As shown, the ink feeding device for inkjet processing of mobile phone back panel includes: a storage tank 1, an outlet 2 fixedly connected to the bottom end of the storage tank 1, a feeding component 3 provided above the inner cavity of the storage tank 1, extension ear plates 4 installed on the left and right sides of the top of the feeding component 3, the extension ear plates 4 being connected to the external frame, a discharge component 5 fixedly connected to the bottom end of the feeding component 3, a self-cleaning component 9 installed at the bottom end of the discharge component 5, a rubber ring 6 movably sleeved on the inner side of the storage tank 1, a scraper ring 7 fixedly connected to the bottom end of the rubber ring 6, the rubber ring 6 moving up and down relative to the storage tank 1, the outer side of the scraper ring 7 in close contact with the inner side of the storage tank 1, an annular groove 8 opened on the inner side of the rubber ring 6, the other end of the self-cleaning component 9 being movably engaged with the annular groove 8, and the self-cleaning component 9 rotating relative to the annular groove 8;

[0053] The feeding assembly 3 includes a fixed tank 31, the left and right sides of the top of the fixed tank 31 are connected to the extension ear plate 4, the bottom of the fixed tank 31 is fixedly connected to the extension tank 32, the bottom of the extension tank 32 is movably sleeved with a movable tank 33, the movable tank 33 rotates relative to the extension tank 32, the extension tank 32 and the movable tank 33 are internally connected, the left end of the fixed tank 31 is fixedly connected to the feeding pipe 35, and the feeding pipe 35 is connected to the external conveying pipe;

[0054] The discharge assembly 5 includes an adjusting pipe 51. The top end of the adjusting pipe 51 is fixedly connected to the bottom end of the movable tank 33. The top end of the adjusting pipe 51 is provided with a through hole and is connected to the bottom end of the movable tank 33. A discharge valve 52 is fixedly connected to the right side of the adjusting pipe 51 near the top end, and a drain valve 57 is fixedly connected to the left side of the adjusting pipe 51 near the bottom end.

[0055] The self-cleaning component 9 includes a guide block 91, which is movably engaged with the annular groove 8. The guide block 91 rotates relative to the annular groove 8. The self-cleaning component 9 also includes a movable plate 93 located in the middle of the storage tank 1. The middle part of the top of the movable plate 93 is connected to the bottom end of the discharge component 5. A sealing plug 94 is fixedly connected to the bottom end of the movable plate 93.

[0056] In the above scheme, the discharge port 2 should correspond to the inkjet head during inkjet processing, and the storage tank 1 should be fixed to the external frame. At the same time, the corresponding UV ink and clean water need to be prepared and selectively connected to the feed pipe 35 through the external feed pipe. It is also necessary to ensure that the incoming ink or clean water has a certain pressure. If the pressure is insufficient, the pressure can be increased through the pressure boosting valve to complete the preparation before feeding.

[0057] In a preferred embodiment, a bent pipe 36 symmetrical to the feed pipe 35 is fixedly connected to the right side of the fixed tank 31. The other end of the bent pipe 36 is connected to the right side of the extension tank 32. Feed troughs 34 are fixedly connected to both the front and rear sides of the movable tank 33 near the bottom. The feed troughs 34 are connected to the regulating pipe 51. A main shaft 38 is movably connected to the middle of the fixed tank 31. The bottom end of the main shaft 38 passes through the bottom end of the fixed tank 31 and is connected to the bottom end of the inner cavity of the movable tank 33. The movable tank 33 rotates with the main shaft 38. An impeller 37 located inside the fixed tank 31 is fixedly sleeved on the outer side of the main shaft 38.

[0058] In the above scheme, when ink needs to be filled, the external feed pipe can be connected to the feed pipe 35, and ink can be injected into the fixed tank 31 at the same time. At this time, the ink can enter the extended tank 32 through the bent pipe 36 at the right end of the fixed tank 31 and enter the movable tank 33. It can also enter the regulating pipe 51 through the feed trough 34. After entering the regulating pipe 51, it can be discharged through the discharge valve 52 on the side, thus completing the ink filling process.

[0059] Simultaneously, when ink enters the fixed tank 31, it can drive the impeller 37 to rotate. At this time, the impeller 37 rotates and drives the main shaft 38 to rotate. At this time, the movable tank 33 rotates relative to the extended tank 32 and drives the adjustment tube 51 at the bottom to rotate. When the adjustment tube 51 rotates, it can synchronously drive the movable rod 56 to rotate. At this time, the discharge valve 52 can evenly inject ink into the storage tank 1 while rotating. At the same time, the movable rod 56 can drive the self-cleaning component 9 to rotate relative to the annular groove 8, thereby agitating the ink inside the storage tank 1 and preventing it from settling and separating.

[0060] By utilizing the flow during ink injection, the rapid flow of ink causes the discharge valve 52 to rotate, allowing it to change the injection position and achieve uniform injection. At the same time, the self-cleaning component 9 can rotate, thereby agitating the ink injected into the storage tank 1. This effectively avoids the problem of ink stratification caused by the fixed injection position in traditional devices, which affects the inkjet effect. It can significantly reduce the possibility of ink stratification, and the whole process is completed automatically, significantly improving the inkjet quality.

[0061] In a preferred embodiment, limiting grooves 53 are provided on both the front and rear sides of the inner cavity of the regulating pipe 51. A limiting plate 54 is movably sleeved inside the regulating pipe 51. The outer side of the limiting plate 54 is movably engaged with the limiting groove 53. A movable rod 56 is fixedly connected to the bottom end of the limiting plate 54. The bottom end of the movable rod 56 passes through the bottom end of the regulating pipe 51 and is connected to the top end of the movable plate 93. When the limiting spring 55 is in the initial state, the top end of the limiting plate 54 is located below the output end of the discharge valve 52. When the limiting spring 55 is in the ultimate tension state, that is, when the bottom end of the limiting plate 54 contacts the bottom end of the inner cavity of the regulating pipe 51, the top end of the limiting plate 54 is located below the output end of the drain valve 57.

[0062] In the above scheme, when a single ink injection is completed and different inks need to be injected, clean water can be injected into the feed pipe 35. At this time, the clean water can also drive the main shaft 38 to rotate and realize the rotation of the regulating pipe 51. When injecting clean water, the discharge valve 52 can be kept in the closed state. At this time, due to the pressure of the clean water and the continuous injection of clean water, the limit spring 55 is stretched, and the limit plate 54 is subjected to pressure and moves down accordingly, and drives the bottom movable rod 56 to move down. When the limit spring 55 is stretched to the limit position, the bottom end of the limit plate 54 contacts the bottom end of the inner cavity of the regulating pipe 51, and the clean water is then discharged through the drain valve 57 and enters the interior of the storage tank 1 to assist in cleaning the interior of the storage tank 1.

[0063] In a preferred embodiment, a first fixed seat 92 is fixedly connected to the end of the guide block 91 away from the annular groove 8, and a second fixed seat 96 is fixedly connected to the top of the movable plate 93 near the outer side. A connecting rod 97 is movably connected between the first fixed seat 92 and the second fixed seat 96 via a rotating shaft. A cleaning brush 98 is fixedly installed at the bottom end of the connecting rod 97. A limiting inclined plate 95 is fixedly connected to the bottom end of the first fixed seat 92. The diameter of the sealing plug 94 is adapted to the inner diameter of the discharge port 2. When the bottom end of the cleaning brush 98 contacts the bottom end of the inner cavity of the storage tank 1, the bottom end of the connecting rod 97 contacts the top end of the limiting inclined plate 95, and the sealing plug 94 is movably sleeved with the discharge port 2 and completely blocks the bottom end of the discharge port 2.

[0064] In the above scheme, when water is injected, the movable rod 56 moves down and drives the movable plate 93 to move downward. At this time, the movable plate 93 moves down relative to the first fixed seat 92, and the connecting rod 97 deflects downward until the bottom end of the connecting rod 97 contacts the top end of the limiting inclined plate 95. At this time, the deflection of the connecting rod 97 is limited. As the movable rod 56 continues to move down, the rubber ring 6 is pushed downward and drives the scraper ring 7 at the bottom end to move downward. At this time, the scraper ring 7 can rub against the inner wall of the storage tank 1 and scrape the inner wall of the storage tank 1. The scraped residue mixed with water can be discharged through the discharge port 2.

[0065] At the same time, as the scraper ring 7 descends to the bottom of the storage tank 1, the displacement of the scraper ring 7 is restricted. At this time, the cleaning brush 98 comes into contact with the bottom of the storage tank 1. Since the water also drives the self-cleaning component 9 to rotate, the cleaning brush 98 rotates relative to the ring groove 8, which can assist in scraping and cleaning the bottom of the storage tank 1.

[0066] By selectively injecting clean water or ink, the self-cleaning component 9 automatically rotates during cleaning, and the scraper ring 7 moves downward to scrape the inner wall of the storage tank 1. At the same time, the cleaning brush 98 is deflected, making it fit tightly against the bottom of the storage tank 1. Combined with the rotation of the self-cleaning component 9, the cleaning process of the inner wall of the storage tank 1 is automatically completed, avoiding the cumbersome brushing process of traditional devices. Only clean water needs to be injected to automatically complete the brushing process, which significantly improves the cleaning efficiency.

[0067] Meanwhile, during the cleaning process, when the scraper ring 7 has not descended to its lowest point, the sealing plug 94 is not in contact with the discharge port 2. The scraped ink mixes with the clean water and is discharged directly through the discharge port 2. When the cleaning brush 98 is pressed tightly against the bottom of the storage tank 1, the sealing plug 94 can completely block the discharge port 2. At this time, the rotation of the connecting rod 97 and the cleaning brush 98 can mix the scraped ink with the clean water. At the same time, the sealing plug 94 can prevent the water from being discharged, and the rotation of the connecting rod 97 can quickly agitate the water flow, assisting in completing the cleaning process.

[0068] By reusing the pressure of the water injection, the cleaning brush 98 can prevent the water from flowing out when cleaning the bottom of the storage tank 1, thus avoiding the waste of water during large-scale rinsing. Instead, it uses the agitation of the water flow to assist in the cleaning process, minimizing water waste and reducing cleaning time, thereby shortening the overall loading time.

[0069] The ink feeding method for an ink feeding device used in inkjet printing of mobile phone back panels includes the following steps:

[0070] S1: When feeding ink, ink can be fed into the feed pipe 35 through the external feed pipe. At this time, the ink enters the extension tank 32 and the movable tank 33 through the fixed tank 31 and the bend pipe 36, and is introduced into the regulating pipe 51 through the feed trough 34. Finally, it is discharged through the discharge valve 52 and injected into the storage tank 1.

[0071] S2: When ink enters the fixed tank 31, it drives the impeller 37 to rotate and drives the main shaft 38 to rotate. At this time, the movable tank 33 and the regulating tube 51 rotate accordingly, which can drive the self-cleaning component 9 at the bottom to rotate. At this time, the self-cleaning component 9 rotates relative to the annular groove 8 to stir the ink inside the storage tank 1 to avoid separation.

[0072] S3: When the ink injection is completed and a second ink injection is required, clean water can be injected into the fixed tank 31 through the external water supply pipe, while keeping the discharge valve 52 in the closed state. At this time, the clean water enters the regulating pipe 51 and drives the limit plate 54 to move down until the limit spring 55 is stretched to the limit state. Then the clean water can be discharged from the drain valve 57 and enter the storage tank 1.

[0073] S4: When the movable rod 56 moves down, the movable plate 93 moves down accordingly, and the connecting rod 97 deflects until it reaches its limit position. The continued downward movement of the movable rod 56 can drive the scraper ring 7 to move down, which can then scrape the inner wall of the storage tank 1 until the cleaning brush 98 contacts the bottom of the inner cavity of the storage tank 1. At this time, the rotation of the self-cleaning component 9 can scrape the bottom of the inner cavity of the storage tank 1. At the same time, the sealing plug 94 can briefly block the output of the discharge port 2 until the cleaning of the inside of the storage tank 1 is completed and all the water flow is drained, so that the secondary ink feeding process can begin.

[0074] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. An ink feeding device for inkjet printing of mobile phone back panels, wherein, The device includes a storage tank with a discharge port fixedly connected to its bottom end. A feeding assembly is located above the inner cavity of the storage tank. Extension lugs are installed on both the left and right sides of the top of the feeding assembly, and these extension lugs are connected to an external frame. A discharge assembly is fixedly connected to the bottom end of the feeding assembly, and a self-cleaning assembly is installed at the bottom end of the discharge assembly. A rubber ring is movably fitted onto the inner surface of the storage tank, and a scraper ring is fixedly connected to the bottom end of the rubber ring. The rubber ring moves vertically relative to the storage tank, and the outer surface of the scraper ring is in close contact with the inner surface of the storage tank. An annular groove is formed on the inner surface of the rubber ring, and one end of the self-cleaning assembly is movably engaged with the annular groove, allowing the self-cleaning assembly to rotate relative to the annular groove. The feeding assembly includes a fixed tank, the left and right sides of the top of the fixed tank are connected to the extension ear plate, the bottom of the fixed tank is fixedly connected to the extension tank, the bottom of the extension tank is movably sleeved with a movable tank, the movable tank rotates relative to the extension tank, the extension tank and the movable tank are internally connected, the left end of the fixed tank is fixedly connected to the feeding pipe, and the feeding pipe is connected to the external conveying pipe. The discharge assembly includes an adjusting pipe, the top end of which is fixedly connected to the bottom end of the movable tank. The top end of the adjusting pipe has a through hole and is connected to the bottom end of the movable tank. A discharge valve is fixedly connected to the right side of the top end of the adjusting pipe, and a drain valve is fixedly connected to the left side of the bottom end of the adjusting pipe. The self-cleaning component includes a guide block that is movably engaged with an annular groove and rotates relative to the annular groove. The self-cleaning component also includes a movable plate located in the middle of the storage tank. The middle part of the top of the movable plate is connected to the bottom end of the discharge component, and a sealing plug is fixedly connected to the bottom end of the movable plate. A main shaft is movably connected to the middle of the fixed tank. The bottom end of the main shaft passes through the bottom end of the fixed tank and connects to the bottom end of the inner cavity of the movable tank. The movable tank rotates with the main shaft. An impeller located inside the fixed tank is fixedly sleeved on the outer side of the main shaft. Limit grooves are opened on both the front and rear sides of the inner cavity of the regulating tube. A limit plate is movably sleeved inside the regulating tube. The outer side of the limit plate is movably engaged with the limit groove. A movable rod is fixedly connected to the bottom end of the limit plate. The bottom end of the movable rod passes through the bottom end of the regulating tube and connects to the top end of the movable plate.

2. The ink feeding device for inkjet processing of mobile phone back panels as described in claim 1, wherein, The right side of the fixed tank is fixedly connected to a curved pipe symmetrical to the feed pipe. One end of the curved pipe is connected to the right side of the extension tank. The front and rear sides of the bottom of the movable tank are fixedly connected to feed troughs, which are connected to the regulating pipe.

3. The ink feeding device for inkjet processing of mobile phone back panels as described in claim 2, wherein, The regulating tube is equipped with a limiting spring inside. When the limiting spring is in the initial state, the top of the limiting plate is located below the output end of the discharge valve. When the limiting spring is in the ultimate tension state, the bottom end of the limiting plate is in contact with the bottom end of the inner cavity of the regulating tube, and the top of the limiting plate is located below the output end of the drain valve.

4. The ink feeding device for inkjet processing of mobile phone back panels as described in claim 3, wherein, The guide block is fixedly connected to a first fixed seat at the end away from the annular groove, and the top of the movable plate is fixedly connected to a second fixed seat. The first fixed seat and the second fixed seat are movably connected by a connecting rod through a rotating shaft.

5. The ink feeding device for inkjet processing of mobile phone back panels as described in claim 4, wherein, A cleaning brush is fixedly installed at the bottom end of the connecting rod, a limiting inclined plate is fixedly connected to the bottom end of the first fixed seat, and the diameter of the sealing plug is adapted to the inner diameter of the discharge port.

6. The ink feeding device for inkjet processing of mobile phone back panels as described in claim 5, wherein, When the bottom end of the cleaning brush contacts the bottom end of the inner cavity of the storage tank, the bottom end of the connecting rod contacts the top end of the limiting inclined plate, and the sealing plug is movably sleeved with the discharge port and completely blocks the bottom end of the discharge port.

7. The feeding method of the ink feeding device for inkjet processing of mobile phone back panels as described in claim 6, wherein, Includes the following steps: S1: When feeding ink, ink is fed into the feed pipe through the external feed pipe. The ink then enters the extended tank and the movable tank through the fixed tank and the bend pipe, and is introduced into the regulating pipe through the feed trough. Finally, it is discharged through the discharge valve and injected into the storage tank. S2: When ink enters the fixed tank, it drives the impeller to rotate and the main shaft to rotate. The movable tank and the regulating tube rotate accordingly, which in turn drives the self-cleaning component at the bottom to rotate. The self-cleaning component rotates relative to the annular groove to stir the ink inside the storage tank and prevent stratification. S3: After the ink injection is completed, before the second ink injection is required, clean water is injected into the fixed tank through the external water supply pipe, while keeping the discharge valve closed. The clean water then enters the regulating pipe and drives the limit plate to move down until the limit spring is stretched to its limit. The clean water is then discharged from the drain valve and enters the storage tank. S4: When the movable rod moves down, the movable plate moves down accordingly, and the connecting rod deflects until it reaches its limit position. The continued downward movement of the movable rod drives the scraper ring to move down, scraping the inner wall of the storage tank until the cleaning brush contacts the bottom of the inner cavity of the storage tank. At the same time, the rotation of the self-cleaning component scrapes the bottom of the inner cavity of the storage tank. Simultaneously, the sealing plug briefly blocks the output of the discharge port until the cleaning of the inside of the storage tank is completed, and all water is drained for the secondary ink loading process.

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