Method, system and equipment for constructing and regulating multi-channel printing flow model of array micro-nozzle and storage medium

Abstract

The invention discloses an array micro-nozzle multi-channel printing flow model construction and regulation method, system and device and a storage medium. The model construction method comprises the steps that all micro-nozzles are controlled to print lines in a groove formed by a limiting layer and a printing substrate; printing line width and printing line height data corresponding to each micro nozzle are obtained, and the sectional area of a printing line corresponding to each micro nozzle is calculated based on the obtained printing line width and printing line height data; the printing pressure is adjusted, and the corresponding printing line sectional area value of each micro spray head after each printing pressure adjustment is obtained; function relations between the micro sprayers and the sectional areas of the printing lines under different printing pressures are established for the micro sprayers; and constructing an array micro-nozzle multi-channel printing flow model based on the function relationship. The technical problem that in the prior art, it is difficult to accurately regulate and control the multi-channel printing flow of the array micro spray head at the same time through a simple and convenient calculation method is effectively solved.

Description

Technical Field

[0001] The present invention belongs to the field of printing technology, and in particular relates to a method, system, device and storage medium for constructing and regulating a multi-channel printing flow model of an array micro-sprinkler. Background Art

[0002] According to the additive manufacturing standard ISO / ASTM52900:2015 released by the American Society for Testing and Materials (ASTM), additive manufacturing technology is divided into 7 categories: binder jetting technology, direct energy deposition technology, material extrusion technology, material jetting technology, powder bed melting technology, lamination technology and photopolymerization technology. Direct writing printing belongs to the material extrusion technology in additive manufacturing technology according to its principle. Its principle is to prepare the material to be processed into a slurry or paste-like raw material called "ink" with good printing performance and squeeze the ink out of the nozzle through mechanical force (piston or screw drive) or pneumatic force. Compared with other types of additive technologies, the biggest advantage of direct writing printing is material compatibility, that is, as long as the material can be prepared into a slurry or paste-like ink, it can realize the three-dimensional solid component molding under this technology.

[0003] However, existing direct-write printers usually have the problem of low printing efficiency, so in order to improve printing efficiency, array micro-nozzles are often used for printing. However, existing array micro-nozzle devices still have the problem of difficult control of nozzle aperture tolerance. The difference in aperture size of different micro-nozzles will lead to large differences in nozzle flow rates. In high-precision application fields such as semiconductors, this magnitude of difference is often unacceptable.

[0004] The existing scheme is to adjust the flow rate by independently controlling the extrusion pressure of each channel, but there is a lack of accurate testing methods for simultaneously adjusting the actual flow rates of different micro-sprinklers. It is difficult to accurately and quickly adjust the multi-channel flow rates to be consistent using existing methods; at the same time, the calculation is relatively cumbersome, and it is often necessary to obtain the relevant parameters of several sub-areas to obtain the overall flow data. Therefore, it is urgent to provide a method that can accurately measure the flow rate of each channel of the array micro-sprinkler and simultaneously adjust the flow rate of multiple channels. Summary of the invention

[0005] The main purpose of the present invention is to provide a method, system, device and storage medium for constructing and regulating a multi-channel printing flow model of an array micro-nozzle, so as to solve the technical problem that it is difficult to use a relatively simple calculation method to achieve simultaneous and precise regulation of the multi-channel printing flow of an array micro-nozzle in the prior art.

[0006] In a first aspect, the present invention provides a method for constructing a multi-channel printing flow model of an array micro-nozzle. The construction method involves a printing device in which a printing substrate is provided with a limiting layer having a pattern consistent with the printed product, and the limiting layer forms a groove on the printing substrate consistent with the printed product.

[0007] The method for constructing a multi-channel printing flow model of an array micro-nozzle comprises:

[0008] Controlling each micro-nozzle to print lines in the groove formed by the limiting layer and the printing substrate;

[0009] Acquire the print line width and print line height data corresponding to each micro-sprinkler, and calculate the cross-sectional area of ​​the print line corresponding to each micro-sprinkler based on the acquired print line width and print line height data;

[0010] Adjust the printing pressure and obtain the cross-sectional area value of the printed lines of each micro-nozzle corresponding to each printing pressure adjustment;

[0011] A functional relationship between each micro-nozzle and the cross-sectional area of ​​the printed line at different printing pressures is established;

[0012] A multi-channel printing flow model of an array micro-nozzle is constructed based on the functional relationship.

[0013] Furthermore, the calculation formula for calculating the cross-sectional area of ​​the printing line corresponding to each micro-sprinkler based on the obtained printing line width and printing line height data is:

[0014]

[0015] Where c is the print line width and h is the print line height.

[0016] Further, the obtaining of the print line width and print line height data corresponding to each micro-sprinkler includes:

[0017] By obtaining the width of each groove formed by the limiting layer and the printing substrate as the printing line width, the printing line height data corresponding to each micro-sprinkler is measured by using a displacement sensor.

[0018] Furthermore, under the combined effect of the limiting layer and the glue tension, the upper surface of the cross section of the printed line is a standard arc shape, so the specific value of the line cross-sectional area can be determined according to the line height and the line width data determined by the limiting layer, thereby obtaining an accurate printing flow rate.

[0019] Further, the adjusting the printing pressure includes:

[0020] Adjust the pressure from small to large or from large to small according to the maximum pressure that the printing device can withstand.

[0021] Furthermore, the functional relationship between each micro nozzle and the cross-sectional area of ​​the printed line under different printing pressures is established, including:

[0022] The printing pressure is adjusted for each micro-nozzle respectively, and each micro-nozzle independently calculates the cross-sectional area of ​​the printed line under different printing pressures, and a linear function of the cross-sectional area of ​​the printed line under different pressures is obtained for each micro-nozzle.

[0023] Furthermore, the printing method is direct writing printing, and the printing speed is 10 to 400 mm / s.

[0024] In a second aspect, the present invention provides a method for controlling flow rate of multi-channel printing of an array micro-nozzle, comprising:

[0025] Based on the constructed mathematical model, the printing speed and printing pressure are preliminarily determined according to the product specification requirements;

[0026] Controlling each micro-nozzle to print lines in the groove formed by the limiting layer and the printing substrate;

[0027] Obtain the print line width and print line height data corresponding to each micro-sprinkler;

[0028] Based on the obtained print line width and print line height data corresponding to each micro-sprinkler, the cross-sectional area of ​​the print line corresponding to each micro-sprinkler is calculated to determine the actual flow rate of each channel;

[0029] The printing flow of each micro-nozzle is synchronously regulated by adjusting the printing pressure.

[0030] Furthermore, the synchronously regulating the printing flow of each micro-nozzle by adjusting the printing pressure includes:

[0031] Based on the constructed mathematical model, determine whether the printing flow difference of each channel and the target flow difference meet the product requirements and specifications; if so, complete the multi-channel printing flow consistency correction; if not, adjust the printing pressure of each channel according to the target flow difference and the relationship between the printing flow and printing pressure of each channel. After the adjustment, perform the printing flow consistency verification again to meet the product specifications.

[0032] In a third aspect, the present invention provides a system for constructing a multi-channel printing flow model of an array micro-nozzle, comprising:

[0033] A printing control module controls each micro-sprinkler to print lines in the groove formed by the limiting layer and the printing substrate;

[0034] A data acquisition module is used to acquire the print line width and print line height data corresponding to each micro-sprinkler;

[0035] A data calculation module calculates the cross-sectional area of ​​the printing line corresponding to each micro-sprinkler based on the acquired printing line width and printing line height data;

[0036] The model building module establishes the functional relationship between each micro-nozzle and the cross-sectional area of ​​the printed line under different printing pressures, and builds an array micro-nozzle multi-channel printing flow model based on the functional relationship.

[0037] In a fourth aspect, the present invention provides a computer device, comprising: a memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the array micro-nozzle multi-channel printing flow model construction method as described above by executing the computer instructions.

[0038] In a fifth aspect, the present invention provides a computer-readable storage medium having computer instructions stored thereon, wherein the computer instructions are used to enable a computer to execute the method for constructing a multi-channel printing flow model for an array micro-nozzle as described above.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] (1) The flow rate of multi-channel array micro-sprinklers can be adjusted accurately and quickly to be consistent. The present invention calculates the cross-sectional area values ​​of the printed lines of each micro-sprinkler corresponding to different printing pressures, establishes a functional relationship between each micro-sprinkler and the cross-sectional area of ​​the printed lines under different printing pressures, and constructs a multi-channel printing flow model of the array micro-sprinkler based on the functional relationship. Then, the flow rate of each channel of the micro-sprinkler is accurately regulated according to the flow model, which can effectively achieve the consistency of multi-channel flow rates and meet the requirements of high-precision application scenarios in the semiconductor field;

[0041] (2) The printing flow rate is calculated accurately. The printing flow rate model construction method of the present invention is particularly suitable for the case where a limiting layer is provided on the printing substrate. By measuring the line height and the line width determined by the limiting layer, the cross-sectional area of ​​the printed line can be accurately calculated, and the cross-sectional area data of the printed line can accurately reflect the actual flow rate of each array micro-nozzle. Therefore, it can effectively solve the technical problem that it is difficult to use a relatively simple calculation method to achieve simultaneous and precise control of the multi-channel printing flow of the array micro-nozzle in the prior art;

[0042] (3) The calculation is relatively simple. The printing flow construction method described in the present invention does not require a complex prediction model, nor does it involve complex multivariate function calculation formulas. It also does not need to superimpose calculations on each sub-area to obtain the cross-sectional area. Under the action of the limiting layer, the present invention can accurately calculate the cross-sectional area of ​​the printed line in one step. At the same time, it only needs to construct a mathematical model based on the functional relationship between the printing pressure and the cross-sectional area of ​​the printed line, and use the mathematical model to appropriately adjust the printing pressure to adjust the printing flow of multiple channels, so that the printing flow control process in the actual process is simpler and easier, and the automatic calibration of the multi-channel flow is realized, thereby improving the printing efficiency and improving the printing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a schematic diagram of the structure of the limiting layer on the printed substrate;

[0044] Figure 2 To print the line cross-section diagram;

[0045] Figure 3 A schematic diagram of the process flow of the method for constructing a multi-channel printing flow of an array micro-nozzle provided by the present invention;

[0046] Figure 4 It is a graph of the functional relationship between line height and cross-sectional area of ​​printed lines;

[0047] Figure 5 It is a functional relationship curve diagram of printing pressure and printed line cross-sectional area;

[0048] Figure 6 The uniformity of each channel after the printing flow rate is calibrated in one embodiment of the present invention;

[0049] Figure 7 A structural block diagram of the system for constructing a multi-channel printing flow model of an array micro-nozzle provided by the present invention;

[0050] Figure 8 A schematic diagram of the hardware structure of the computer device provided by the present invention;

[0051] Description of the drawings: 1-printing substrate, 2-limiting layer. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0053] As described in the background technology section of the present invention, existing direct-write printers usually have the problem of low printing efficiency. Therefore, in order to improve printing efficiency, array micro-nozzles are often used for printing. However, the existing array micro-nozzle equipment still has the problem of difficult control of nozzle aperture tolerance. The difference in aperture size of different micro-nozzles will lead to large differences in nozzle flow rates. In high-precision application fields such as semiconductors, this magnitude of difference will lead to poor consistency of printed products and fail to meet high product specifications. At present, there is no model construction and control method for simultaneous multi-channel printing flow of multiple micro-nozzles.

[0054] The first aspect of the present invention provides a method for constructing a multi-channel printing flow model of an array micro-nozzle, wherein the printing device in the construction method is provided with a limiting layer 2 having a pattern consistent with the printed product on a printing substrate 1. The limiting layer 2 forms a groove or a groove array consistent with the printed product on the printing substrate 1, and there is a first mutually repulsive force between the material of the limiting layer 2 and the printed material. On the one hand, the groove positions the printed product; on the other hand, the groove can also assist in accurately positioning the printed material in the groove, so that the shape and size of the printed product are more precise, so as to achieve high printing accuracy. Figure 1 The figure shows a schematic diagram of the structure of the limiting layer 2 on the printed substrate 1. For a detailed description of the limiting layer 2, please refer to patent CN 116728856 A. Figure 2 As shown, under the combined effect of the limiting layer 2 and the glue tension, the upper surface of the cross section of the printed line is a standard arc shape. Therefore, the specific value of the line cross-sectional area can be determined according to the line height and the line width data determined by the limiting layer, thereby obtaining an accurate actual printing flow.

[0055] like Figure 3 As shown, the method for constructing a multi-channel printing flow model of an array micro-nozzle of the present invention includes:

[0056] S101, controlling each micro-nozzle to print lines in the groove formed by the limiting layer and the printing substrate;

[0057] S102, obtaining print line width and print line height data corresponding to each micro-sprinkler, and calculating the cross-sectional area of ​​the print line corresponding to each micro-sprinkler based on the obtained print line width and print line height data;

[0058] S103, adjusting the printing pressure, and obtaining the cross-sectional area value of the printed lines of each micro-nozzle corresponding to each printing pressure adjustment;

[0059] S104, establishing a functional relationship between each micro-nozzle and the cross-sectional area of ​​the printed line under different printing pressures;

[0060] S105, constructing an array micro-nozzle multi-channel printing flow model based on the functional relationship.

[0061] Specifically, in one embodiment of the present invention, the calculation formula for calculating the cross-sectional area of ​​the printing line corresponding to each micro-sprinkler based on the acquired printing line width and printing line height data is:

[0062]

[0063] Where c is the print line width and h is the print line height.

[0064] In one embodiment of the present invention, the above step S101 includes:

[0065] S1011, designing a limiting layer according to the array size of the product to be printed, so that the limiting layer has a groove array consistent with the product;

[0066] S1012, developing a pattern of a limiting layer on the cleaned glass substrate by photolithography technology;

[0067] S1013, loading printing ink into a barrel, installing it on a 3D printing device platform, and installing a printing needle;

[0068] S1014, using the visual device of the 3D printing equipment to grasp and position the edge of the printing substrate, and using the precision motion platform to ensure that the printing needle of the array micro-nozzle is aligned to the middle of the groove, and the material is printed in the groove.

[0069] In one embodiment of the present invention, the step of obtaining the print line width and line height data corresponding to each micro-sprinkler includes:

[0070] The width of each groove formed by the limiting layer and the printing substrate is obtained as the printing line width, and the printing line height data corresponding to each micro-sprinkler is measured by using a displacement sensor.

[0071] In one embodiment of the present invention, adjusting the printing pressure comprises:

[0072] Adjust the pressure from small to large or from large to small in sequence according to the maximum pressure that the printing device can withstand;

[0073] Specifically, the printing pressure can be adjusted in sequence by 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90% of the maximum pressure that the printing device can withstand, or a range value consisting of any two of these values, and the print line cross-sectional area data under the above pressures are recorded respectively to reflect the actual printing flow rate; similarly, the printing pressure can also be adjusted in sequence by 90%, 80%, 70%, 60%, 50%, 40%, 30%, 20%, 10% of the maximum pressure that the printing device can withstand, or a range value consisting of any two of these values, and the print line cross-sectional area data under the above pressures are recorded.

[0074] In one embodiment of the present invention, the functional relationship between each micro nozzle and the cross-sectional area of ​​the printed line under different printing pressures is established, including:

[0075] The printing pressure is adjusted for each micro-nozzle respectively, and each micro-nozzle independently calculates the cross-sectional area of ​​the printed line under different printing pressures, and a linear function of the cross-sectional area of ​​the printed line under different pressures is obtained for each micro-nozzle.

[0076] In one embodiment of the present invention, the printing material involved in the method is ink with a viscosity value below 100,000 cp, and the printing method is direct writing printing.

[0077] Compared with the prior art, the present invention achieves: (1) the multi-channel array micro-nozzle flow can be adjusted accurately and quickly to be consistent. The present invention calculates the cross-sectional area values ​​of the printed lines of each micro-nozzle corresponding to different printing pressures, establishes a functional relationship between the cross-sectional area of ​​the printed lines and each micro-nozzle under different printing pressures, and constructs a multi-channel printing flow model of the array micro-nozzle based on the functional relationship. Then, the flow of each channel of the micro-nozzle is accurately regulated according to the flow model, which can effectively achieve the consistency of multi-channel flow and meet the requirements of high-precision application scenarios in the semiconductor field; (2) the printing flow calculation is accurate. The printing flow model construction method of the present invention is particularly suitable for the case where a limiting layer is provided on the printing substrate. By measuring the line height and the line width determined by the limiting layer, the cross-sectional area of ​​the printed line can be accurately calculated, and the cross-sectional area data of the printed line can be obtained. It accurately reflects the actual flow rate of each array micro-nozzle, thus effectively solving the technical problem that it is difficult to use a relatively simple calculation method in the prior art to achieve simultaneous and precise regulation of the multi-channel printing flow of the array micro-nozzle; (3) The calculation is relatively simple. The printing flow construction method described in the present invention does not require a complex prediction model, nor does it involve complex multivariate function calculation formulas. It also does not need to superimpose calculations on each sub-area to obtain the cross-sectional area. Under the action of the limiting layer, the present invention can accurately calculate the cross-sectional area of ​​the printed line in one step. At the same time, it only needs to construct a mathematical model based on the functional relationship between the printing pressure and the cross-sectional area of ​​the printed line, and use the mathematical model to appropriately adjust the printing pressure to adjust the printing flow of the multiple channels, making the printing flow control process in the actual process more simple and easy, realizing automatic calibration of the multi-channel flow, thereby improving printing efficiency and improving printing quality.

[0078] In a specific embodiment, the method for constructing the printing flow model includes the following steps:

[0079] (1) Designing a limiting layer according to the size of the product array to be printed so that the limiting layer has a groove array consistent with the product;

[0080] (2) developing a pattern of a limiting layer on a clean glass substrate by photolithography technology; the limiting layer adopts LTC 9305 of the LTC9000 series of FUJIFILM Company, and the thickness of the limiting layer is 0.5 μm;

[0081] (3) The printing ink was loaded into a 3 mL barrel and installed on the 3D printing device platform, and a printing needle was installed; an array micro-nozzle with an inner diameter of 70 μm was used, the printing speed was controlled to be 150 mm / s, the ink material was acrylic resin with a viscosity of 3400 cp, and the temperature was controlled to be constant during printing;

[0082] (4) Using the visual device of the 3D printing equipment to grasp and position the edge of the printing substrate, and using the precision motion platform to ensure that the printing needle of the array micro-nozzle is aligned to the middle of the groove, and the material is printed in the groove;

[0083] (5) obtaining print line width and print line height data corresponding to each micro-sprinkler, and calculating the cross-sectional area of ​​the print line corresponding to each micro-sprinkler based on the obtained print line width and print line height data;

[0084] The calculation formula for the cross-sectional area S of the printed line is:

[0085] c is the groove width, h is the line height;

[0086] (6) adjusting the printing pressure, and obtaining the cross-sectional area value of the printed lines of each micro-nozzle corresponding to each printing pressure adjustment;

[0087] (7) The functional relationship between the cross-sectional area of ​​the printed lines and the different printing pressures is established for each micro-nozzle:

[0088] Test line width and line height under different pressures to obtain the corresponding relationship between printing pressure and cross-sectional area "S", see Table 1 and Figure 5 .from Figure 5 It can be seen that there is a good linear relationship between the printing pressure and the cross-sectional area of ​​the printed line, and the two satisfy y = 39.003x-211, R 2 =0.998, which proves that the printing pressure and the cross-sectional area of ​​the printed line can satisfy a linear function relationship.

[0089] In addition, based on the theoretical relationship between the discharge flow rate and the extrusion pressure, the micro-nozzle of direct writing printing can be approximated as a long and thin hole, and the flow calculation formula of the long and thin hole is:

[0090] Where Q is the flow rate, d is the inner diameter of the micro nozzle, μ is the material viscosity, l is the length of the inner hole of the micro nozzle, and ΔP is the pressure difference between the inside and outside of the micro nozzle.

[0091] It can be seen that from a theoretical point of view, for the same micro-nozzle, the discharge flow rate is linearly correlated with the extrusion pressure, and the actual measurement is consistent with the theory, which confirms that the above-mentioned test method of adjusting the printing pressure to adjust the printing flow rate is feasible.

[0092] (8) Constructing a multi-channel printing flow model of an array micro-nozzle based on the functional relationship.

[0093] Table 1

[0094] Air pressure (psi) Line width (μm) Line height average (μm) <![CDATA[Cross-sectional area (μm 2 )]]> 70 136 27.08 2530.96 65 136 24.70 2297.49 60 136 23.78 2207.42 55 136 20.83 1923.09 50 136 18.83 1732.68 45 136 16.73 1534.59 40 136 14.88 1361.49

[0095] The second aspect of the present invention provides a method for controlling flow rate of multi-channel printing of an array micro-nozzle, comprising:

[0096] Based on the constructed mathematical model, the printing speed and printing pressure are preliminarily determined according to the product specification requirements;

[0097] Controlling each micro-nozzle to print lines in the groove formed by the limiting layer and the printing substrate;

[0098] Obtain the print line width and print line height data corresponding to each micro-sprinkler;

[0099] Based on the obtained print line width and print line height data corresponding to each micro-sprinkler, the cross-sectional area of ​​the print line corresponding to each micro-sprinkler is calculated to determine the actual flow rate of each channel;

[0100] The printing flow of each micro-nozzle is synchronously regulated by adjusting the printing pressure.

[0101] In one embodiment of the present invention, the synchronously regulating the printing flow of each micro-nozzle by adjusting the printing pressure includes:

[0102] Based on the constructed mathematical model, determine whether the printing flow difference of each channel and the target flow difference meet the product requirements and specifications; if so, complete the multi-channel printing flow consistency correction; if not, adjust the printing pressure of each channel according to the target flow difference and the relationship between the printing flow and printing pressure of each channel. After the adjustment, perform the printing flow consistency verification again to meet the product specifications.

[0103] In a specific embodiment, Figure 6 The above embodiment uses a 20-channel array micro-nozzle direct writing printing channel uniformity. The line width height h is used as an approximate indicator to characterize the uniformity of the printing flow rate for the following reasons:

[0104] For the printed substrate with the same limiting layer, c is a fixed value, on which a function curve of cross-sectional area "S" and line height "h" is drawn (the curve is drawn based on c = 1), such as Figure 4 As shown in the figure, it can be observed that the line height "h" is approximately linearly related to the cross-sectional area "S" in the range of 0 to 0.5.

[0105] Therefore, for scenarios with low precision requirements, the line height "h" can be used to approximate the cross-sectional area "S" to obtain reference flow data.

[0106] In the figure, every three continuous lines are the height data of the same channel of micro-nozzle printing three times, and the micro-nozzle data of different channels are divided by yellow lines; the blue line in the figure is the actual data measured by the sensor. The reason why the blue line is relatively uneven is that there is a certain height difference between the printed substrates themselves. The green line is the height data after deducting the height change of the printed substrate itself. It can be seen from the figure that the uniformity of the printed product is good after the printing flow is calibrated according to the constructed mathematical model.

[0107] In another embodiment of the present invention, a system for constructing a multi-channel printing flow model of an array micro-nozzle is also provided, and the system is used to implement the above-mentioned embodiments and preferred embodiments, and the descriptions that have been made will not be repeated. As used below, the term "module" can implement a combination of software and / or hardware of a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceived.

[0108] like Figure 7 As shown, the third aspect of the present invention provides an array micro-nozzle multi-channel printing flow model construction system, comprising:

[0109] The printing control module 201 controls each micro-sprinkler to print lines in the groove formed by the limiting layer and the printing substrate;

[0110] The data acquisition module 202 acquires the print line width and print line height data corresponding to each micro-sprinkler;

[0111] The data calculation module 203 calculates the cross-sectional area of ​​the printing line corresponding to each micro-sprinkler based on the acquired printing line width and printing line height data;

[0112] The model building module 204 establishes a functional relationship between each micro-nozzle and the cross-sectional area of ​​the printed line under different printing pressures, and builds a multi-channel printing flow model of the array micro-nozzle based on the functional relationship.

[0113] In one embodiment of the present invention, the printing control module 201 is used to control each micro-nozzle to print lines in the grooves formed by the limiting layer and the printing substrate. Due to the effect of the limiting layer, the width of the printed line is exactly the width of the groove. Therefore, as long as the width data of each groove on the printing substrate is accurately obtained, it can be used as line width data to accurately calculate the cross-sectional area of ​​the printed line.

[0114] In one embodiment of the present invention, the array micro-nozzle multi-channel printing flow model construction system further includes: a flow correction module for determining whether the difference between the printing flow of each channel and the target flow meets the product requirements.

[0115] like Figure 8As shown, a fourth aspect of the present invention provides a computer device, including: one or more processors and memories, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. The various components are connected to each other using different buses for communication, and can be installed on a common motherboard or installed in other ways as needed. The processor can process instructions executed in the computer device, including instructions stored in or on the memory to display graphical information of a GUI on an external input / output device (such as a display device coupled to an interface). In some optional embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Similarly, multiple computer devices can be connected, and each device provides some necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Figure 8 A processor 301 is taken as an example.

[0116] The processor 301 may be a central processing unit, a network processor or a combination thereof. The processor 301 may further include a hardware chip. The hardware chip may be a dedicated integrated circuit, a programmable logic device or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable logic gate array, a general purpose array logic or any combination thereof.

[0117] The memory 302 stores instructions executable by at least one processor 301, so that the at least one processor 301 executes the above-mentioned method for constructing a multi-channel printing flow model for array micro-nozzles.

[0118] The memory 302 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created according to the use of the computer device, etc. In addition, the memory 302 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 optional embodiments, the memory 302 may optionally include a memory remotely arranged relative to the processor 301, and these remote memories may be connected to the computer device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0119] The memory 302 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid state drive; the memory 302 may also include a combination of the above types of memory.

[0120] The computer device further includes a communication interface 303 for the computer device to communicate with other devices or a communication network.

[0121] The fifth aspect of the present invention provides a computer-readable storage medium, on which computer instructions are stored, and the computer instructions are used to enable a computer to execute the array micro-sprinkler multi-channel printing flow model construction method as described above. The method according to the above-mentioned embodiment of the present invention can be implemented in hardware, firmware, or implemented as a computer code that can be recorded in a storage medium, or downloaded through a network and originally stored in a remote storage medium or a non-temporary machine-readable storage medium and will be stored in a local storage medium, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state hard disk, etc.; further, the storage medium can also include a combination of the above-mentioned types of memory. It can be understood that a computer, a processor, a microprocessor controller or programmable hardware includes a storage component that can store or receive software or computer code, and when the software or computer code is accessed and executed by a computer, a processor or hardware, the method shown in the above embodiment is implemented.

[0122] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the present invention.

Claims

1. A method for constructing a multi-channel printing flow model of an array micro-nozzle, characterized in that: The construction method involves a printing substrate in a printing device provided with a limiting layer, and the method comprises: Controlling each micro-nozzle to print lines in the groove formed by the limiting layer and the printing substrate; Acquire the print line width and print line height data corresponding to each micro-sprinkler, and calculate the cross-sectional area of ​​the print line corresponding to each micro-sprinkler based on the acquired print line width and print line height data; Adjust the printing pressure and obtain the cross-sectional area value of the printed lines of each micro-nozzle corresponding to each printing pressure adjustment; A functional relationship between each micro-nozzle and the cross-sectional area of ​​the printed line at different printing pressures is established; A multi-channel printing flow model of an array micro-nozzle is constructed based on the functional relationship.

2. The method for constructing a multi-channel printing flow model of an array micro-nozzle according to claim 1, characterized in that: The calculation formula for calculating the cross-sectional area of ​​the printing line corresponding to each micro-sprinkler based on the obtained printing line width and printing line height data is: Where c is the print line width and h is the print line height.

3. The method for constructing a multi-channel printing flow model of an array micro-nozzle according to claim 1, characterized in that: The step of obtaining the print line width and line height data corresponding to each micro-sprinkler includes: By obtaining the width of each groove formed by the limiting layer and the printing substrate as the printing line width, the printing line height data corresponding to each micro-sprinkler is measured by using a displacement sensor.

4. The method for constructing a multi-channel printing flow model of an array micro-nozzle according to claim 1, characterized in that: The upper surface of the cross section of the printed line is in an arc shape.

5. The method for constructing a multi-channel printing flow model of an array micro-nozzle according to claim 1, characterized in that: The adjusting printing pressure comprises: Adjust the pressure from small to large or from large to small according to the maximum pressure that the printing device can withstand.

6. The method for constructing a multi-channel printing flow model of an array micro-nozzle according to claim 1, characterized in that: The functional relationship between each micro-nozzle and the cross-sectional area of ​​the printed line under different printing pressures is established, including: The printing pressure is adjusted for each micro-nozzle respectively, and each micro-nozzle independently calculates the cross-sectional area of ​​the printed line under different printing pressures, and a linear function of the cross-sectional area of ​​the printed line under different pressures is obtained for each micro-nozzle.

7. The method for constructing a multi-channel printing flow model of an array micro-nozzle according to claim 1, characterized in that: The printing method is direct writing printing.

8. A method for controlling the flow rate of multi-channel printing of an array micro-nozzle, characterized in that: include: Based on the model constructed by the method for constructing a multi-channel printing flow model of an array micro-nozzle according to any one of claims 1 to 7, the printing flow of each micro-nozzle is regulated by adjusting the printing pressure of each micro-nozzle.

9. A system for constructing a multi-channel printing flow model of an array micro-nozzle, characterized in that: include: A printing control module controls each micro-sprinkler to print lines in the groove formed by the limiting layer and the printing substrate; A data acquisition module is used to acquire the print line width and print line height data corresponding to each micro-sprinkler; A data calculation module calculates the cross-sectional area of ​​the printing line corresponding to each micro-sprinkler based on the acquired printing line width and printing line height data; The model building module establishes the functional relationship between each micro-nozzle and the cross-sectional area of ​​the printed line under different printing pressures, and builds an array micro-nozzle multi-channel printing flow model based on the functional relationship.

10. A computer device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the method according to any one of claims 1 to 7 by executing the computer instructions.

11. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a computer to execute the method according to any one of claims 1 to 7.

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