Color printing method, color printer, system and medium for circuit board

Abstract

The present invention discloses a color printing method for a circuit board, a color printer, a system, and a medium, relating to the technical field of circuit board printing. The method comprises: setting an avoidance zone based on the positions of the solder pads and high-frequency signal area of ​​the circuit board; designing a printing pattern for the circuit board; applying a print coating to the printed surface of the circuit board; establishing a printing reference table; determining a printing scheme for each pixel point based on the printing reference table to obtain a print file; placing the circuit board on a printing platform of a color printer; providing the circuit board with a print detection area; pre-printing the circuit board in the print detection area, capturing the pre-printed pattern using an image acquisition device, and comparing the pre-printed pattern with a preset pattern; when the comparison result is qualified, dividing the print pattern into multiple print lines, and printing and curing the circuit board line by line according to the print file, forming a print pattern on the print coating of the circuit board. This method is capable of printing a color pattern on a circuit board.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit board printing, and in particular to a color printing method, a color printer, a system and a medium for a circuit board. Background Art

[0002] During the circuit board manufacturing process, text and characters need to be printed on the surface of the circuit board. Currently, these characters and characters are printed in black or white. Therefore, current circuit board printers are only capable of printing black and white patterns. When printing color patterns on circuit boards, current circuit board printers are not capable of printing accordingly. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a color printing method, color printer, system and medium for printing color patterns on a circuit board without affecting the normal function of the circuit board.

[0004] In one aspect, a color printing method for a circuit board according to an embodiment of the present invention is applied to a color printer, wherein the color printer has multiple ink cartridges and multiple nozzles, each ink cartridge is used to store ink of a different color, and each nozzle is connected to a corresponding ink cartridge; the method comprises:

[0005] Set the avoidance zone according to the position of the PCB pads and high-frequency signal areas;

[0006] Designing a printing pattern for the circuit board; wherein the printing pattern avoids the avoidance area;

[0007] Applying a printing coating on the printing surface of the circuit board;

[0008] Establishing a printing reference table; the printing reference table includes a plurality of elements, each element is used to specify a printing scheme corresponding to a corresponding pixel value, the printing scheme including a selected nozzle and an inkjet volume of the nozzle;

[0009] Identifying the pixel value of each pixel of the printing pattern, and determining the printing scheme of each pixel according to the printing reference table to obtain a printing file;

[0010] Placing the circuit board on the printing platform of the color printer; the circuit board is provided with a printing detection area;

[0011] Pre-printing the circuit board in the printing detection area, capturing the pre-printed pattern through an image acquisition device, and comparing the pre-printed pattern with a preset pattern;

[0012] When the comparison result is qualified, the printing pattern is divided into a plurality of printing lines, and the circuit board is printed and cured line by line according to the printing file and the printing lines, so as to form the printing pattern on the printing coating of the circuit board.

[0013] According to some embodiments of the present invention, the color printer includes a printer table, wherein the printing platform and a first drive device for driving the printing platform to move in a first direction are provided on the surface of the printer table; a second drive device and a printing device are provided above the printing platform; the second drive device is used to drive the printing device to move in a second direction, and the first direction and the second direction are perpendicular to each other in a horizontal plane; the printing device is provided with the image acquisition device and the UV irradiation device, and a plurality of the nozzles are provided inside the printing device, each of the nozzles is connected to the corresponding ink cartridge via a pipeline, and each of the pipelines is provided with a peristaltic pump;

[0014] The step of printing and curing the circuit board line by line according to the print file to form the print pattern on the print coating of the circuit board includes:

[0015] Determining the ink jetting amount of each nozzle at each position of the current printing line according to the printing file;

[0016] The printing device is driven to move along the second direction by the second driving device, and during the movement, each of the nozzles ejects a corresponding amount of ink at each position of the current printing line;

[0017] After completing printing of the current printing line, driving the printing device to move in the second direction in the opposite direction by the second driving device, and irradiating and curing the current printing line by the UV irradiation device;

[0018] The printing platform is driven by the first driving device to move along the first direction to the next printing line, and the step of determining the ink jetting amount of each nozzle at each position of the current printing line according to the printing file is returned until the printing and curing of all the printing lines are completed, and the printing pattern is formed on the printing coating of the circuit board.

[0019] According to some embodiments of the present invention, a plurality of liftable fixing members are provided on the periphery of the printing platform, and the circuit board has a foolproof alignment target point; and placing the circuit board on the printing platform of the color printer includes:

[0020] Placing the circuit board on the printing platform of the color printer so that the edge of the circuit board is located below the fixing member;

[0021] driving the fixing member to descend so that the fixing member presses the circuit board tightly to fix the circuit board;

[0022] The image acquisition device is used to identify the foolproof alignment target point and position the circuit board.

[0023] According to some embodiments of the present invention, the printing platform is further provided with a temperature control device; and after placing the circuit board on the printing platform of the color printer, the method further includes:

[0024] determining a pre-curing temperature of the ink;

[0025] The printing platform is heated to the pre-curing temperature by the temperature control device.

[0026] According to some embodiments of the present invention, the color printer further includes a nozzle cleaning device, the nozzle cleaning device being disposed on one side of the printing platform, the nozzle cleaning device comprising a plurality of cleaning slots and ink guide slots spaced apart in sequence, a cleaning liquid and a plurality of suction nozzles being disposed within the cleaning slots, and a lifting assembly for driving the nozzle to be raised and lowered being disposed within the printing device;

[0027] After forming the printed pattern on the printed coating layer of the circuit board, the method further includes:

[0028] driving the printing device to move above the ink guide groove along the second direction by the second driving device;

[0029] Turning off the peristaltic pump and driving each of the nozzles to spray ink toward the ink guide groove for a preset time, so that the residual ink in the nozzle flows into the ink guide groove;

[0030] The second driving device drives the printing device to move along the second direction to above the cleaning tank, and the lifting assembly drives the nozzle to descend into the cleaning tank and immerse it in the cleaning liquid for cleaning;

[0031] The second driving device is driven to drive the printing device to move along the second direction to the suction nozzle, so that each suction nozzle performs negative pressure suction on the corresponding nozzle.

[0032] According to some embodiments of the present invention, applying a printing coating on the printing surface of the circuit board includes:

[0033] Applying white primer on the printing surface of the circuit board;

[0034] The white primer is cured to form the printing coating.

[0035] According to some embodiments of the present invention, after pre-printing the circuit board in the print detection area, capturing the pre-printed pattern by an image acquisition device, and comparing the pre-printed pattern with a preset pattern, the method further includes:

[0036] When the comparison result is unqualified, driving each of the nozzles to spray a preset amount of ink individually;

[0037] Obtaining the actual color and actual amount of ink ejected by each of the nozzles;

[0038] Comparing the actual color with the ink color of the ink cartridge corresponding to the nozzle, and comparing the actual ink amount with the preset amount to obtain a comparison result;

[0039] According to the comparison result, the faulty printhead is determined, and the faulty printhead is replaced or adjusted.

[0040] On the other hand, according to an embodiment of the present invention, the color printer has multiple ink cartridges and multiple nozzles, each ink cartridge is used to store ink of a different color, each nozzle is connected to the corresponding ink cartridge, and the color printer is used to implement the color printing method of the circuit board as described in the above-mentioned embodiment.

[0041] On the other hand, a color printing system for circuit boards according to an embodiment of the present invention includes at least one control processor and a memory for communicating with the at least one control processor; the memory stores instructions that can be executed by the at least one control processor, and the instructions are executed by the at least one control processor to enable the at least one control processor to execute the color printing method for circuit boards described in the above-mentioned embodiment.

[0042] On the other hand, according to a computer-readable storage medium of an embodiment of the present invention, the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the color printing method for a circuit board as described in the above-mentioned embodiment.

[0043] According to the color printing method, color printer, system and medium of the circuit board according to the embodiment of the present invention, there are at least the following beneficial effects: by setting multiple nozzles and multiple ink cartridges, color patterns can be printed on the circuit board; by setting an avoidance area, the printed pattern is made to avoid the avoidance area, which can prevent the printed pattern from affecting the normal function of the circuit board; by applying a printing coating on the printing surface of the circuit board, it can not only protect the circuit of the circuit board, but also make the printed pattern clearer; by establishing a printing reference table, the printing process of the printing device is made faster and more accurate; by setting a printing detection area on the circuit board, the printing effect of the nozzle is ensured to be correct; by printing and curing the circuit board line by line, the printing efficiency is improved and the printing effect is guaranteed.

[0044] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0046] Figure 1 A schematic structural diagram of a color printer according to an embodiment of the present invention;

[0047] Figure 2 A schematic structural diagram of a color printer according to another embodiment of the present invention;

[0048] Figure 3 This is a schematic structural diagram of a foolproof alignment target according to an embodiment of the present invention;

[0049] Figure 4 The figure is a flowchart of the steps of the color printing method of the circuit board according to the embodiment of the present invention. DETAILED DESCRIPTION

[0050] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application. The step numbers in the following embodiments are provided only for the convenience of explanation and do not limit the order of the steps. The order of execution of the steps in the embodiments can be adaptively adjusted according to the understanding of those skilled in the art.

[0051] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0052] The terms "first," "second," "third," and "fourth," etc., in the specification, claims, and accompanying drawings of the present invention are used to distinguish between different items, not to describe a specific order. Furthermore, the terms "including," "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements, but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to the process, method, product, or apparatus.

[0053] References to "embodiments" in this disclosure mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the disclosure. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0054] During the circuit board manufacturing process, text and characters need to be printed on the surface of the circuit board. Currently, these characters and characters are printed in black or white. Therefore, current circuit board printers are only capable of printing black and white patterns. When printing color patterns on circuit boards, current circuit board printers are not capable of printing accordingly.

[0055] To this end, an embodiment of the present invention provides a color printing method, color printer, system and medium for a circuit board. By setting multiple nozzles and multiple ink cartridges, a color pattern can be printed on the circuit board; by setting an avoidance area, the printed pattern is made to avoid the avoidance area, thereby preventing the printed pattern from affecting the normal function of the circuit board; by applying a printing coating on the printing surface of the circuit board, the circuit board circuit can be protected and the printed pattern can be made clearer; by establishing a printing reference table, the printing process of the printing device can be made faster and more accurate; by setting a printing detection area on the circuit board, the printing effect of the nozzle is ensured to be correct; by printing and curing the circuit board line by line, the printing efficiency is improved and the printing effect is guaranteed.

[0056] The color printing method for a circuit board, the color printer, the system, and the medium according to the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0057] On the one hand, if Figure 1 and Figure 2As shown, an embodiment of the present invention provides a color printer, which includes a printer table 100. A printing platform 110 and a first driving device 300 for driving the printing platform 110 to move along a first direction are provided on the surface of the printer table 100. A second driving device 400 and a printing device 500 are provided above the printing platform 110. The second driving device 400 is used to drive the printing device 500 to move along a second direction. The first direction and the second direction are perpendicular to each other in a horizontal plane; the printing device 500 is provided with an image acquisition device and a UV irradiation device, and a plurality of nozzles are provided inside the printing device 500. Each nozzle is connected to a corresponding ink cartridge 800 through a pipeline, and a peristaltic pump is provided on each pipeline.

[0058] Specifically, in this example, Figure 2 As shown, the first direction refers to Figure 2 The front and rear directions shown are Figure 2In the left-right direction shown, the first drive device 300 is used to drive the printing platform 110 to move in the front-to-back direction, and the second drive device 400 is used to drive the printing device 500 to move in the left-to-right direction. When printing a circuit board 200, the circuit board 200 is first placed on the printing platform 110. The first drive device 300 then drives the printing platform 110 to move to the initial printing position. Subsequently, the second drive device 400 drives the printing device 500 to move to the circuit board 200 to print on the circuit board 200. It should be noted that when printing in color on the circuit board 200, the circuit board 200 is printed line by line. That is, after the second drive device 400 drives the printing device 500 to print a line of the circuit board 200 from left to right, the first drive device 300 drives the printing platform 110 to move the next printing line of the circuit board 200 to the printing position of the printing device 500, causing the printing device 500 to print the next line of the circuit board 200. This process is repeated until printing is completed. At the same time, a UV irradiation device is also provided in the printing device 500. When the second driving device 400 drives the printing device 500 to print a line on the circuit board 200 from left to right, the second driving device 400 will drive the printing device 500 to move from right to left, so that the UV irradiation device irradiates and cures the line just printed. This can prevent the ink printed by the printing device 500 from spreading and contaminating other unprinted areas, thereby ensuring the accuracy of the printed pattern. In this application, the color printer has multiple ink cartridges 800, each ink cartridge 800 is used to store ink of a different color. At the same time, the printing device 500 has multiple nozzles, each nozzle is connected to a corresponding ink cartridge 800. In this way, when the color printer prints on the circuit board 200, each nozzle can spray ink of a different color to meet the printing requirements of the color pattern. In addition, the printing device 500 is also provided with an image acquisition device, which can identify the pattern printed by the printing device 500 on the circuit board 200. When the image acquisition device finds that the pattern printed by the printing device 500 on the circuit board 200 does not match the required pattern, it can issue an alarm and stop printing.

[0059] It should be noted that the first driving device 300 can use a linear guide, a screw transmission device, or a gear rack transmission device to drive the printing platform 110 to move; similarly, the second driving device 400 can use a similar structure to drive the printing device 500 to move.

[0060] Furthermore, if Figure 1As shown, in some embodiments of the present application, a plurality of elevating fixtures 600 are provided around the periphery of the printing platform 110. Before the circuit board 200 is placed on the printing platform 110, the fixtures 600 are in an elevated position. After the circuit board 200 is placed on the printing platform 110, the fixtures 600 descend, pressing the circuit board 200 tightly to prevent the circuit board 200 from shifting during printing and to prevent the circuit board 200 from warping, thereby ensuring the normal progress of the printing process. The fixtures 600 serve to position and secure the circuit board 200.

[0061] Furthermore, if Figure 3 As shown, in some embodiments of the present application, the circuit board 200 has foolproof alignment targets 210. These targets 210 enable the image acquisition device to align the circuit board 200 before printing, thereby determining the printing position and ensuring printing accuracy. In this example, foolproof alignment targets 210 are set at all four corners of the circuit board 200, and one of the foolproof alignment targets 210 is offset along the long side of the circuit board 200, further improving alignment accuracy.

[0062] Furthermore, in some embodiments of the present application, a printed coating is provided on the surface of the circuit board 200, which is coated with white ink. The printed coating can protect the circuits on the surface of the circuit board 200 on the one hand, and make the color patterns printed on the circuit board 200 clearer on the other hand.

[0063] According to the color printer of the embodiment of the present application, a color pattern can be printed on the circuit board 200 and the accuracy of the color pattern can be ensured while avoiding the color pattern from affecting the circuits on the circuit board 200, thereby improving the printing effect of the color pattern.

[0064] On the other hand, based on the above-mentioned color printer, the embodiment of the present application also proposes a color printing method for a circuit board, such as Figure 4 As shown, the method includes the following steps:

[0065] Step S100: setting an avoidance zone according to the positions of the pads and the high-frequency signal area of ​​the circuit board 200;

[0066] Step S200: Designing a printing pattern for the circuit board 200; the printing pattern avoids the avoidance area;

[0067] Step S300: applying a printing coating on the printing surface of the circuit board 200;

[0068] Step S400: creating a printing reference table; the printing reference table includes a plurality of elements, each element being used to specify a printing solution corresponding to a corresponding pixel value, the printing solution including a selected nozzle and an inkjet volume of the nozzle;

[0069] Step S500: identifying the pixel value of each pixel of the print pattern, and determining the printing scheme for each pixel according to the print reference table to obtain a print file;

[0070] Step S600: placing the circuit board 200 on the printing platform 110 of the color printer; the circuit board is provided with a printing detection area;

[0071] Step S700: Pre-printing a circuit board in a print detection area, capturing a pre-printed pattern through an image acquisition device, and comparing the pre-printed pattern with a preset pattern;

[0072] Step S800: When the comparison result is qualified, the print pattern is divided into a plurality of print lines, and the circuit board 200 is printed and cured line by line according to the print file to form a print pattern on the print coating of the circuit board.

[0073] Specifically, in this application, in order to print a pattern on circuit board 200, it is first necessary to determine the location of the solder pads and the high-frequency signal area of ​​circuit board 200. The printed pattern needs to avoid the locations of the solder pads and the high-frequency signal area. This prevents the printed pattern from affecting the connection between the solder pads of circuit board 200 and other components, and also prevents the printed pattern from affecting the impedance matching or heat dissipation performance of the high-frequency signal area. Therefore, when designing the printed pattern on circuit board 200, it is necessary to avoid the avoidance area.

[0074] Then, a printing coating needs to be applied to the printed surface of the circuit board 200. The printing coating not only protects the circuits on the surface of the circuit board 200, but also makes the color pattern printed on the circuit board 200 clearer. In this example, to apply the printing coating to the printed surface of the circuit board 200, step S300 includes the following two sub-steps:

[0075] Step S310: applying white primer to the printing surface of the circuit board 200;

[0076] Step S320: solidifying the white primer to form a printing coating.

[0077] Specifically, in this application, a white primer can be applied to the printed surface of the circuit board 200 by screen printing or spraying, and then the white primer is baked and cured to form a printed coating. It should be noted that a window needs to be opened in the printed coating to expose the pads of the circuit board.

[0078] In some embodiments of the present application, each nozzle of the printing device 500 is connected to a corresponding ink cartridge 800, and each nozzle can spray ink of a different color. When it is necessary to print a pattern on the circuit board 200, it is necessary to first determine the color of each position of the pattern in order to determine which nozzle is needed to spray ink at that position. It should be noted that for some patterns with rich color levels, the color of the ink sprayed by a single nozzle may not meet the requirements. In this case, multiple nozzles are required to spray ink at the same position, and the required color is formed by mixing multiple inks. To this end, in this example, a printing reference table is established. The printing reference table contains multiple elements, each element records the printing scheme corresponding to the corresponding pixel value, and the printing scheme includes the selected nozzle and the amount of ink sprayed by the nozzle. In other words, through the printing reference table, you only need to know the pixel value of a certain position to know which nozzles need to be used for inkjet and the amount of ink that each nozzle needs to spray. After establishing a printing reference table, the pixel value of each pixel point of the printing pattern is identified. Therefore, according to the printing reference table, the nozzle and ink amount corresponding to each position of the printing pattern can be known. The printing plans of all pixel points are summarized to form a complete printing file. The printing file is sent to the printing device 500, so that the printing device 500 prints the circuit board 200 according to the printing file to obtain the required printing pattern.

[0079] In some embodiments of the present application, the circuit board 200 is provided with a print detection area, which is located at the edge area of ​​the circuit board 200. Before the printing device 500 prints the circuit board 200 according to the print file, it is necessary to perform pre-printing at the print detection area of ​​the circuit board 200. Pre-printing refers to designing a preset pattern. The printing device 500 performs pre-printing in the print detection area according to the preset pattern and a print reference table. The pre-printed pattern is then captured by an image acquisition device and compared with the preset pattern. If, after comparison, the pre-printed pattern is substantially consistent with the preset pattern, it indicates that all the nozzles are in normal condition. If the pre-printed pattern differs significantly from the preset pattern, it is necessary to check which nozzles have problems and replace or correct the nozzles with problems.

[0080] Specifically, in some embodiments of the present application, after the above-mentioned step S700 of pre-printing the circuit board in the print detection area, capturing the pre-printed pattern by the image acquisition device, and comparing the pre-printed pattern with the preset pattern, the following four steps are further included:

[0081] Step S710: When the comparison result is unqualified, each nozzle is driven to spray a preset amount of ink individually;

[0082] Step S720: obtaining the actual color and actual amount of ink ejected by each nozzle;

[0083] Step S730: Compare the actual color with the ink color of the ink cartridge corresponding to the printhead, and compare the actual ink amount with the preset amount to obtain a comparison result;

[0084] Step S740: Determine the faulty printhead based on the comparison result, and replace or adjust the faulty printhead.

[0085] Specifically, when the pre-printed pattern differs significantly from the preset pattern, the comparison result is unqualified. It is necessary to check which nozzles have problems and replace or correct the nozzles with problems. In order to determine which nozzles have problems, each nozzle is driven to spray a preset amount of ink separately. Then, the image recognition device identifies the actual color of the ink sprayed by the nozzle, and checks whether the actual color of the ink is consistent with the color of the ink pre-stored in the ink cartridge 800. At the same time, the actual amount of ink sprayed by the nozzle is determined by detecting the amount of ink remaining in the ink cartridge 800. It is also determined whether the actual amount of ink is consistent with the preset amount. If the color and ink amount are consistent, it indicates that the nozzle is normal. If the color or ink amount is inconsistent, it indicates that the nozzle is faulty and needs to be replaced or adjusted before printing on the circuit board 200, thereby ensuring the accuracy of the printed pattern.

[0086] In some embodiments of the present application, when the pre-printed pattern is substantially consistent with the preset pattern, the printing device 500 starts printing on the circuit board 200. In the above-mentioned step S800, printing and curing the circuit board 200 line by line according to the print file to form a printed pattern on the printed coating of the circuit board 200 includes the following four sub-steps:

[0087] Step S810: determining the ink jetting amount of each nozzle at each position of the current print line according to the print file;

[0088] Step S820: The second driving device 400 drives the printing device 500 to move in the second direction. During the movement, each nozzle ejects a corresponding amount of ink at each position of the current printing line.

[0089] Step S830: After the printing of the current printing line is completed, the second driving device 400 drives the printing device 500 to move in the second direction in the reverse direction, and the UV irradiation device irradiates and cures the current printing line;

[0090] Step S840: The first driving device 300 drives the printing platform 110 to move to the next printing line along the first direction, and returns to step S810 until the printing and curing of all printing lines are completed, forming a printing pattern on the printing coating of the circuit board 200.

[0091] Specifically, after the circuit board 200 is placed on the printing platform 110, the first drive device 300 drives the printing platform 110 to move to the initial printing position. Subsequently, the second drive device 400 drives the printing device 500 to move to the circuit board 200 to print on the circuit board 200. It should be noted that when printing in color on the circuit board 200, the circuit board 200 is printed line by line. That is, after the second drive device 400 drives the printing device 500 to print a line of the circuit board 200 from left to right, the first drive device 300 drives the printing platform 110 to move so that the next printing line of the circuit board 200 moves to the printing position of the printing device 500. At the same time, a UV irradiation device is also provided in the printing device 500. When the second driving device 400 drives the printing device 500 to print a line on the circuit board 200 from left to right, the second driving device 400 will drive the printing device 500 to move from right to left, so that the UV irradiation device irradiates and cures the line just printed. This can prevent the ink printed by the printing device 500 from spreading, avoid contaminating other unprinted areas, and ensure the accuracy of the printed pattern.

[0092] In some embodiments of the present application, the above-mentioned step S600 of placing the circuit board 200 on the printing platform 110 of the color printer includes the following three sub-steps:

[0093] Step S610: placing the circuit board 200 on the printing platform 110 of the color printer so that the edge of the circuit board 200 is located below the fixing member 600;

[0094] Step S620: driving the fixing member 600 downward so that the fixing member 600 presses the circuit board 200 to fix the circuit board 200;

[0095] Step S630: Identify the foolproof alignment target point through the image acquisition device and position the circuit board 200.

[0096] Specifically, if Figure 1 As shown, in some embodiments of the present application, a plurality of liftable fixing members 600 are provided on the peripheral side of the printing platform 110. Before the circuit board 200 is placed on the printing platform 110, the fixing members 600 are in an ascending state. After the circuit board 200 is placed on the printing platform 110, the fixing members 600 descend and press the circuit board 200 to prevent the circuit board 200 from deflecting during the printing process and to prevent the circuit board 200 from warping, thereby ensuring the normal progress of the printing process. The fixing members 600 play the role of positioning and fixing the circuit board 200. Figure 3As shown, in some embodiments of the present application, the circuit board 200 has foolproof alignment targets 210. These targets 210 enable the image acquisition device to align the circuit board 200 before printing, thereby determining the printing position and ensuring printing accuracy. In this example, foolproof alignment targets 210 are set at all four corners of the circuit board 200, and one of the foolproof alignment targets 210 is offset along the long side of the circuit board 200, further improving alignment accuracy.

[0097] Furthermore, in some embodiments of the present application, the printing platform 110 is further provided with a temperature control device; after the circuit board 200 is placed on the printing platform 110 of the color printer, the following two steps are further included:

[0098] Determine the pre-curing temperature of the ink;

[0099] The printing platform is heated to the pre-curing temperature by the temperature control device.

[0100] Specifically, in this example, the printing platform 110 is heated and insulated by a temperature control device so that the circuit board 200 on the printing platform 110 is maintained at a certain temperature, which is just enough to allow the ink sprayed from the nozzle to pre-solidify quickly, preventing the ink from diffusing to other places and avoiding contamination of other locations.

[0101] Furthermore, in some embodiments of the present application, Figure 1 As shown, the color printer further includes a nozzle cleaning device 700, which is disposed on one side of the printing platform 110. The nozzle cleaning device 700 includes a cleaning tank 710, which is provided with a plurality of ink guide grooves 720 at intervals. The cleaning tank 710 is further provided with a cleaning liquid and a plurality of suction nozzles 730. The printing device 500 is provided with a lifting assembly for driving the nozzle to move up and down. After printing is completed, the following four steps are further included:

[0102] The second driving device 400 drives the printing device 500 to move along the second direction to above the ink guide groove 720;

[0103] Turn off the peristaltic pump and drive each nozzle to spray ink toward the ink guide groove 720 for a preset time, so that the residual ink in the nozzle flows into the ink guide groove 720;

[0104] The second driving device 400 is driven to drive the printing device 500 to move along the second direction to the suction nozzle 730, so that each suction nozzle 730 performs negative pressure suction on the corresponding nozzle;

[0105] The second driving device 400 drives the printing device 500 to move above the cleaning tank 710 along the second direction, and the lifting assembly drives the nozzle to descend into the cleaning tank and be immersed in the cleaning liquid for cleaning.

[0106] Specifically, after printing is completed, the nozzle needs to be cleaned to avoid clogging of the nozzle and ensure the normal progress of the next printing. When cleaning the nozzle, first drive the printing device 500 to move to the top of the ink guide groove 720 through the second drive device 400. At the same time, turn off the peristaltic pump so that the nozzle sprays the remaining ink into the ink guide groove 720; then, move the nozzle to the suction nozzle 730 and perform negative pressure suction on the nozzle to ensure that the residual ink on the nozzle is completely removed; finally, soak the nozzle in the cleaning liquid to clean it and keep it clean. In addition, air holes can be set on the side of the cleaning tank 710 to blow dry the nozzle after cleaning.

[0107] According to the color printing method of the circuit board according to the embodiment of the present invention, by setting multiple nozzles and multiple ink cartridges 800, a color pattern can be printed on the circuit board 200; by setting an avoidance area, the printed pattern is made to avoid the avoidance area, which can prevent the printed pattern from affecting the normal function of the circuit board; by applying a printing coating on the printing surface of the circuit board 200, the circuit of the circuit board 200 can be protected and the printed pattern can be made clearer; by establishing a printing reference table, the printing process of the printing device 500 can be faster and more accurate; by setting a printing detection area on the circuit board 200, the printing effect of the nozzle is ensured to be correct; by printing and curing the circuit board 200 line by line, the printing efficiency is improved and the printing effect is guaranteed.

[0108] On the other hand, an embodiment of the present invention also provides a color printing system for circuit boards, comprising at least one control processor and a memory for communicating with the at least one control processor; the memory stores instructions that can be executed by the at least one control processor, and the instructions are executed by the at least one control processor so that the at least one control processor can execute the above-mentioned color printing method for circuit boards.

[0109] On the other hand, an embodiment of the present invention further provides a storage medium, which is a computer-readable storage medium and stores a computer program. When the computer program is executed by a processor, the color printing method of the circuit board is implemented.

[0110] The memory, as a non-transient computer-readable storage medium, can be used to store non-transient software programs and non-transient computer executable programs. In addition, the memory may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some embodiments, the memory optionally includes a memory remotely located relative to the processor, and these remote memories can be connected to the processor via a network. Examples of the above-mentioned networks include but are not limited to the Internet, an intranet, a local area network, a mobile communication network and a combination thereof. The device embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and are located in one place, or may be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment.

[0111] Although specific embodiments are described herein, those skilled in the art will recognize that many other modifications or alternative embodiments are also within the scope of this disclosure. For example, any of the functions and / or processing capabilities described in conjunction with a particular device or component may be performed by any other device or component. In addition, although various exemplary implementations and architectures have been described in accordance with embodiments of the present disclosure, those skilled in the art will recognize that many other modifications to the exemplary implementations and architectures described herein are also within the scope of this disclosure.

[0112] Some aspects of the present disclosure have been described above with reference to the block diagrams and flow charts of the systems, methods, systems and / or computer program products according to the exemplary embodiments. It should be understood that the combination of one or more blocks in the block diagram and the flow chart and the blocks in the block diagram and the flow chart can be realized by executing computer executable program instructions respectively. Equally, according to some embodiments, some blocks in the block diagram and the flow chart may not need to be executed in the order shown, or may not need to be executed in full. In addition, additional components and / or operations beyond those components and / or operations shown in the blocks in the block diagram and the flow chart may be present in certain embodiments.

[0113] Therefore, the blocks in the block diagrams and flow charts support combinations of means for performing the specified functions, combinations of elements or steps for performing the specified functions, and program instruction means for performing the specified functions. It should also be understood that each block in the block diagrams and flow charts, and combinations of blocks in the block diagrams and flow charts, can be implemented by a dedicated hardware computer system that performs the specific functions, elements, or steps, or a combination of dedicated hardware and computer instructions.

[0114] The program modules, applications, etc. described herein may include one or more software components, including, for example, software objects, methods, data structures, etc. Each such software component may include computer-executable instructions that, in response to execution, cause at least a portion of the functionality described herein (e.g., one or more operations of the illustrative methods described herein) to be performed.

[0115] Software component can be encoded with any one in various programming languages.A kind of exemplary programming language can be low-level programming language, such as the assembly language associated with specific hardware architecture and / or operating system platform.Comprise that the software component of assembly language instruction may need to be converted to executable machine code by assembler before being executed by hardware architecture and / or platform.Another exemplary programming language can be a more advanced programming language, and it can be transplanted across multiple architectures.Comprise that the software component of more advanced programming language may need to be converted to intermediate representation by interpreter or compiler before execution.Other examples of programming language include but are not limited to macro language, shell or command language, job control language, script language, database query or search language or report writing language.In one or more exemplary embodiments, the software component that comprises the instruction of one in the above-mentioned programming language example can be directly executed by operating system or other software component, without first being converted into another form.

[0116] Software components can be stored as files or other data storage structures. Software components of similar types or related functions can be stored together, such as in a specific directory, folder, or library. Software components can be static (e.g., preset or fixed) or dynamic (e.g., created or modified at execution time).

[0117] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the scope of the present invention.

Claims

1. A color printing method for a circuit board, characterized in that: Applicable to a color printer, the color printer has multiple ink cartridges, each of the ink cartridges is used to store ink of a different color, the color printer includes a printer table, the surface of the printer table is provided with a printing platform and a first drive device, a second drive device and a printing device are provided above the printing platform, a plurality of nozzles are provided inside the printing device, the printing device is also provided with an image acquisition device and a UV irradiation device, each of the nozzles is connected to the corresponding ink cartridge through a pipeline, and each pipeline is provided with a peristaltic pump; the method includes: Set the avoidance zone according to the position of the PCB pads and high-frequency signal areas; Designing a printing pattern for the circuit board; wherein the printing pattern avoids the avoidance area; Applying a printing coating on the printing surface of the circuit board; Establishing a printing reference table; the printing reference table includes a plurality of elements, each element is used to specify a printing scheme corresponding to a corresponding pixel value, the printing scheme including a selected nozzle and an inkjet volume of the nozzle; Identifying the pixel value of each pixel of the printing pattern, and determining the printing scheme of each pixel according to the printing reference table to obtain a printing file; Placing the circuit board on the printing platform of the color printer; the circuit board is provided with a printing detection area; Pre-printing the circuit board in the printing detection area, capturing the pre-printed pattern through an image acquisition device, and comparing the pre-printed pattern with a preset pattern; When the comparison result is qualified, the printing pattern is divided into a plurality of printing lines, and the circuit board is printed and cured line by line according to the printing file and the printing lines, so as to form the printing pattern on the printing coating of the circuit board; The step of printing and curing the circuit board line by line according to the print file to form the print pattern on the print coating of the circuit board includes: Determining the ink jetting amount of each nozzle at each position of the current printing line according to the printing file; The printing device is driven to move in a second direction by the second driving device, and during the movement, each of the nozzles ejects a corresponding amount of ink at each position of the current printing line; After the printing of the current printing line is completed, the printing device is driven to move in the second direction in the reverse direction by the second driving device, and the current printing line is irradiated and cured by the UV irradiation device; The printing platform is driven by a first driving device to move along a first direction to the next printing line, and returns to the step of determining the ink jetting amount of each nozzle at each position of the current printing line according to the printing file until the printing and curing of all the printing lines are completed, and the printing pattern is formed on the printing coating of the circuit board; the first direction and the second direction are perpendicular to each other in the horizontal plane.

2. The color printing method of a circuit board according to claim 1, characterized in that: The printing platform is provided with a plurality of liftable fixing members on its periphery, and the circuit board has a foolproof alignment target point; the circuit board is placed on the printing platform of the color printer, including: Placing the circuit board on the printing platform of the color printer so that the edge of the circuit board is located below the fixing member; driving the fixing member to descend so that the fixing member presses the circuit board tightly to fix the circuit board; The image acquisition device is used to identify the foolproof alignment target point and position the circuit board.

3. The color printing method of a circuit board according to claim 1, characterized in that: The printing platform is also provided with a temperature control device; after the circuit board is placed on the printing platform of the color printer, the method further comprises: determining a pre-curing temperature of the ink; The printing platform is heated to the pre-curing temperature by the temperature control device.

4. The color printing method of a circuit board according to claim 1, characterized in that: The color printer also includes a nozzle cleaning device, which is arranged on one side of the printing platform. The nozzle cleaning device includes a plurality of cleaning slots and ink guide slots spaced apart in sequence. The cleaning slots are provided with cleaning liquid and a plurality of suction nozzles. The printing device is provided with a lifting assembly for driving the nozzle to move up and down. After forming the printed pattern on the printed coating layer of the circuit board, the method further includes: driving the printing device to move above the ink guide groove along the second direction by the second driving device; Turning off the peristaltic pump and driving each of the nozzles to spray ink toward the ink guide groove for a preset time, so that the residual ink in the nozzle flows into the ink guide groove; The second driving device drives the printing device to move along the second direction to above the cleaning tank, and the lifting assembly drives the nozzle to descend into the cleaning tank and immerse it in the cleaning liquid for cleaning; The second driving device is driven to drive the printing device to move along the second direction to the suction nozzle, so that each suction nozzle performs negative pressure suction on the corresponding nozzle.

5. The color printing method of a circuit board according to claim 1, characterized in that: Applying a printing coating on the printing surface of the circuit board comprises: Applying white primer on the printing surface of the circuit board; The white primer is cured to form the printing coating.

6. The color printing method for a circuit board according to claim 1, characterized in that: After pre-printing the circuit board in the print detection area, capturing the pre-printed pattern through an image acquisition device, and comparing the pre-printed pattern with a preset pattern, the method further includes: When the comparison result is unqualified, driving each of the nozzles to spray a preset amount of ink individually; Obtaining the actual color and actual amount of ink ejected by each of the nozzles; Comparing the actual color with the ink color of the ink cartridge corresponding to the nozzle, and comparing the actual ink amount with the preset amount to obtain a comparison result; According to the comparison result, the faulty printhead is determined, and the faulty printhead is replaced or adjusted.

7. A color printer, characterized in that: The color printer has multiple ink cartridges and multiple nozzles, each ink cartridge is used to store ink of a different color, each nozzle is connected to the corresponding ink cartridge, and the color printer is used to implement the color printing method of the circuit board as described in any one of claims 1-6.

8. A color printing system for a circuit board, characterized in that: It includes at least one control processor and a memory for communicating with the at least one control processor; the memory stores instructions that can be executed by the at least one control processor, and the instructions are executed by the at least one control processor to enable the at least one control processor to execute the color printing method of the circuit board as described in any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the color printing method for a circuit board according to any one of claims 1 to 6.

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