A printing speed intelligent control method, device and system

Abstract

The present invention relates to the technical field of screen printing, and specifically discloses an intelligent control method for printing speed, including: obtaining the current operating state of a machine; when the current operating state of the machine is a stop printing state, controlling a timer to start and begin timing; during the timing process of the timer, when the current operating state of the machine is restored to a printing state, controlling the timer to stop timing; obtaining the timing duration from the start of the timer to the stop of the timer, wherein the timing duration is the downtime duration of the machine; and controlling the printing speed of the machine after resuming printing according to the downtime duration of the machine. The present invention also discloses an intelligent control device for printing speed and an intelligent control system for printing speed. The intelligent control method for printing speed provided by the present invention does not require manual adjustment of parameters and manual squeezing; the machine printing speed control is determined based on the downtime, so as to solve the problem of line breakage after the machine is restarted after the downtime, and reduce the number of defective line breaks.

Description

Technical Field

[0001] The present invention relates to the technical field of screen printing, and in particular to an intelligent printing speed control method, an intelligent printing speed control device, and an intelligent printing speed control system including the intelligent printing speed control device. Background Art

[0002] The screen printing process in solar energy manufacturing is mainly printing and sintering. The quality of printing directly affects the appearance and conversion efficiency of the solar cell. The basic principle of screen printing is to use the basic principle that the mesh of the graphic part of the screen is permeable to the slurry, and the mesh of the non-graphic part is not slurry. When printing, pour the slurry on one end of the screen, use a scraper to apply a certain pressure on the slurry part on the screen, and move toward the other end of the screen at the same time. The slurry is squeezed from the mesh of the graphic part to the silicon wafer by the scraper during movement. After printing, the scraper is lifted, and the ink return knife is lowered. The ink return knife scrapes the slurry back to the starting point and spreads it on the screen surface.

[0003] like Figure 1-2 As shown, taking the topcon product as an example, it needs to go through four printing steps, and the printing process is: ① Print the main grid lines on the back → dry → ② Print the secondary grid lines on the back → dry → flip (180°) → ③ Print the main grid lines on the front → dry → ④ Print the secondary grid lines on the front.

[0004] In the actual production process, machine failure or some debugging may cause the printing of other versions to stop. If the machine stops for a long time, the slurry in the mesh will dry up, resulting in mesh blockage during printing and broken lines in appearance.

[0005] With the increase of production capacity, the printing speed is constantly increasing, from the previous 300mm / s to the current 400mm / s-500mm / s, and the ink return speed is 1200mm / s-1500mm / s. Under the background of high-speed printing, the impact of screen blockage after restarting after shutdown is greater. Usually, restarting printing after shutdown requires manual squeezing of the screen, wiping of the screen, manual adjustment of printing parameters, and reducing the printing speed. After normal printing, the normal printing speed can be restored. Summary of the invention

[0006] In view of the defects and shortcomings in the prior art, the present invention provides an intelligent control method for printing speed, an intelligent control device for printing speed and an intelligent control system for printing speed including the intelligent control device for printing speed, so as to solve the problem in the prior art that printing again after shutdown usually requires manual squeezing of the screen, wiping of the screen, manual adjustment of printing parameters, reduction of printing speed, and restoration of normal printing speed after normal printing.

[0007] As a first aspect of the present invention, there is provided an intelligent control method for printing speed, the intelligent control method for printing speed comprising:

[0008] Step S1: Obtain the current operating status of the machine;

[0009] Step S2: When the current operation state of the machine is the printing stop state, the control timer is started and starts timing;

[0010] Step S3: During the timing process of the timer, when the current operating state of the machine returns to the printing state, controlling the timer to stop timing;

[0011] Step S4: obtaining the time duration between when the timer starts to count and when it stops counting, wherein the time duration between when the timer starts to count and when it stops counting is the downtime of the machine;

[0012] Step S5: According to the downtime of the machine, the printing speed of the machine after resuming printing is controlled.

[0013] Furthermore, the controlling of the printing speed of the machine after the machine resumes printing according to the downtime of the machine also includes:

[0014] Determining whether the downtime of the machine is less than or equal to a preset downtime threshold;

[0015] If yes, controlling the printing speed of the machine to be the first speed value after resuming printing, and returning the timer to zero;

[0016] If not, the printing speed of the machine after resuming printing is controlled to be a second speed value, wherein, when the number of printed sheets printed by the machine at the second speed value reaches a set sheet value, the timer is reset to zero, and the printing speed of the machine is controlled to resume to the first speed value.

[0017] As another aspect of the present invention, there is provided an intelligent control device for printing speed, the intelligent control device for printing speed comprising:

[0018] The first acquisition module is used to obtain the current operating status of the machine;

[0019] A first control module is used to control the timer to start and start timing when the current operating state of the machine is a printing stop state;

[0020] A second control module is used to control the timer to stop timing when the current operating state of the machine returns to the printing state during the timing of the timer;

[0021] A second acquisition module is used to acquire the timing duration between the start and stop of the timer, wherein the timing duration between the start and stop of the timer is the downtime duration of the machine;

[0022] The third control module is used to control the printing speed of the machine after the machine resumes printing according to the downtime of the machine.

[0023] As another aspect of the present invention, an intelligent control system for printing speed is provided, comprising a PLC controller and a photoelectric sensor, a printing head translation motor and a timer respectively connected to the PLC controller, wherein the PLC controller comprises the intelligent control device for printing speed as described above, wherein:

[0024] The photoelectric sensor is installed at a fixed position at each feeding end, and is used to detect whether there is material at each feeding end, and send the detection result of each feeding end to the PLC controller;

[0025] The PLC controller is used to control the operation of the printing head translation motor according to the detection results of each feeding end; wherein, when there is material at each feeding end, the printing head translation motor starts to work, and the current operation state of the machine is the printing state; when there is no material at each feeding end, the printing head translation motor stops working, and the current operation state of the machine is the stop printing state;

[0026] The timer is used to start and begin timing when the PLC controller determines that the current operating state of the machine is a printing stop state; and during the timing process, when the PLC controller determines that the current operating state of the machine is restored to a printing state, stop timing; and use the timing duration from the start of timing to the stop of timing as the downtime of the machine and send it to the PLC controller;

[0027] The PLC controller can control the printing speed of the machine after it resumes printing according to the downtime of the machine.

[0028] Further, the PLC controller determines whether the downtime of the machine is less than or equal to a preset downtime threshold;

[0029] If yes, controlling the printing speed of the machine to be the first speed value after resuming printing, and returning the timer to zero;

[0030] If not, the printing speed of the machine after resuming printing is controlled to be a second speed value, wherein, when the number of printed sheets printed by the machine at the second speed value reaches a set sheet value, the timer is reset to zero, and the printing speed of the machine is controlled to resume to the first speed value.

[0031] Furthermore, it also includes a start button and a stop button respectively connected to the PLC controller. When the stop button is pressed, the PLC controller controls the printing head translation motor to stop working regardless of whether there is material at each feeding end. The PLC controller can control the printing head translation motor to work again only after the start button is pressed.

[0032] Furthermore, it also includes an alarm connected to the PLC controller. When the alarm sounds, regardless of whether there is material at each feeding end, the PLC controller controls the printing head translation motor to stop working. The PLC controller can control the printing head translation motor to work again only after resetting and eliminating the alarm.

[0033] The intelligent control method of printing speed provided by the present invention has the following advantages: printing parameters can be set according to demand without manual adjustment of parameters and manual squeezing; the printing speed control of the machine is determined based on the downtime, which solves the problem of line breakage after restarting the machine after downtime and reduces the number of defective line breaks. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation of the present invention.

[0035] Figure 1 This is a conventional printed flow chart.

[0036] Figure 2 This is a schematic diagram of a conventional printed graphic.

[0037] Figure 3 The present invention is a flowchart of the intelligent printing speed control method provided by the present invention.

[0038] Figure 4 This is a structural block diagram of the intelligent control system for printing speed provided by the present invention.

[0039] Figure 5 The present invention provides a flowchart of the timer. DETAILED DESCRIPTION

[0040] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0041] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the present invention.

[0042] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so as to describe the embodiments of the present invention described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0043] In this embodiment, an intelligent control method for printing speed is provided. Figure 3 The flow chart of the intelligent control method of printing speed provided by the present invention is as follows: Figure 3 As shown, the intelligent control method of printing speed includes:

[0044] Step S1: Obtain the current operating status of the machine;

[0045] Step S2: When the current operation state of the machine is the printing stop state, the control timer is started and starts timing;

[0046] Step S3: During the timing process of the timer, when the current operating state of the machine returns to the printing state, controlling the timer to stop timing;

[0047] Step S4: obtaining the time duration between when the timer starts to count and when it stops counting, wherein the time duration between when the timer starts to count and when it stops counting is the downtime of the machine;

[0048] Step S5: According to the downtime of the machine, the printing speed of the machine after resuming printing is controlled.

[0049] The invention provides an intelligent control method for printing speed, which is applicable to the screen printing process in the process of manufacturing crystalline silicon solar cells in the photovoltaic industry.

[0050] Preferably, the controlling of the printing speed of the machine after the machine resumes printing according to the downtime of the machine also includes:

[0051] Determine whether the downtime of the machine is less than or equal to a preset downtime threshold;

[0052] If yes, controlling the printing speed of the machine to be the first speed value after resuming printing, and returning the timer to zero;

[0053] If not, the printing speed of the machine after resuming printing is controlled to be a second speed value, wherein, when the number of printed sheets printed by the machine at the second speed value reaches a set sheet value, the timer is reset to zero, and the printing speed of the machine is controlled to resume to the first speed value.

[0054] As another embodiment of the present invention, an intelligent control device for printing speed is provided, wherein the intelligent control device for printing speed comprises:

[0055] The first acquisition module is used to obtain the current operating status of the machine;

[0056] A first control module is used to control the timer to start and start timing when the current operating state of the machine is a printing stop state;

[0057] A second control module is used to control the timer to stop timing when the current operating state of the machine returns to the printing state during the timing of the timer;

[0058] A second acquisition module is used to acquire the timing duration between the start and stop of the timer, wherein the timing duration between the start and stop of the timer is the downtime duration of the machine;

[0059] The third control module is used to control the printing speed of the machine after the machine resumes printing according to the downtime of the machine.

[0060] As another embodiment of the present invention, an intelligent control system for printing speed is provided, such as Figure 4 As shown, the intelligent control system of printing speed includes a PLC controller and a photoelectric sensor, a printing head translation motor and a timer respectively connected to the PLC controller, and the PLC controller includes the intelligent control device of printing speed described above, wherein:

[0061] The photoelectric sensor is installed at a fixed position at each feeding end, and is used to detect whether there is material (sheet) at each feeding end, and send the detection result of each feeding end to the PLC controller;

[0062] The PLC controller is used to control the operation of the printing head translation motor according to the detection results of each feeding end; wherein, when there is material (sheet) at each feeding end, the printing head translation motor starts to work, and the current operation state of the machine is the printing state; when there is no material (sheet) at each feeding end, the printing head translation motor stops working, and the current operation state of the machine is the stop printing state;

[0063] The timer is used to start and begin timing when the PLC controller determines that the current operating state of the machine is a printing stop state; and during the timing process, when the PLC controller determines that the current operating state of the machine is restored to a printing state, stop timing; and use the timing duration from the start of timing to the stop of timing as the downtime of the machine and send it to the PLC controller;

[0064] The PLC controller can control the printing speed of the machine after it resumes printing according to the downtime of the machine.

[0065] It should be understood that the control method of the print head translation motor is: by installing a photoelectric sensor at a fixed position at each feeding end, it detects whether there is material (silicon wafer) at each feeding end. If there is material (silicon wafer), the print head translation motor starts to work; if there is no material (silicon wafer), the print head translation motor stops working. Whether the machine is in printing state is determined by whether the print head translation motor is working.

[0066] It should be noted that there are usually three situations in which the machine stops printing:

[0067] The first type: the machine stops printing due to a fault or the stop button is pressed;

[0068] The second type: the machine stops printing because of a failure of an upstream machine, resulting in a lack of incoming materials. This is known as the waiting state.

[0069] The third type: The machine is blocked due to a failure of a downstream machine, and the machine stops printing, which is the so-called blocking state.

[0070] For example: When the third-stage machine stops printing due to a malfunction, the fourth-stage machine stops printing due to waiting for materials. At this time, printing can only continue after the third-stage machine is restored.

[0071] In this embodiment, if Figure 5 As shown, the working logic of the timer is as follows: no matter which version, as long as the machine is in a non-printing state, the PLC controller triggers the timer to start, and when the machine resumes printing, the timer stops, and the interval between the start and stop of the timer is the downtime of the machine;

[0072] Set the downtime threshold to X min. The downtime threshold can be modified and set according to the situation.

[0073] (1) If the machine downtime is ≤Xmin, the printing speed mode is high speed, the printing speed is Y1 mm / s (Y1 can be modified and set according to the situation), and the timer is reset to zero;

[0074] (2) If the machine downtime is greater than Xmin, the printing speed mode is low speed, the printing speed is Y2 mm / s (Y2 can be modified and set according to the situation), and the number of sheets is set to A sheets (the number of sheets threshold A can be modified and set according to the situation). When the number of sheets printed in the low speed mode reaches A sheets, the timer is reset to zero and the high speed mode is restored.

[0075] Case Description:

[0076] Assume X=5, Y1=500, Y2=300, A=20;

[0077] (1) When the machine stops printing, the timer is enabled. When the machine starts printing next time, the timer stops. The timing time is 3 minutes. Since 3 minutes is less than 5 minutes, the printing speed of the machine is 500 mm / s, and the timer is reset to zero.

[0078] (2) When the machine stops printing, the timer is started. When the machine starts printing next time, the timer stops and the timing is 10 minutes. Since 10 minutes > 5 minutes, the printing speed of the machine is 300 mm / s. The first 20 sheets are printed at 300 mm / s. After printing 20 sheets, the timer is reset to zero and the printing speed of the machine is restored to 500 mm / s.

[0079] Preferably, the PLC controller determines whether the downtime of the machine is less than or equal to a preset downtime threshold;

[0080] If yes, controlling the printing speed of the machine to be the first speed value after resuming printing, and returning the timer to zero;

[0081] If not, the printing speed of the machine after resuming printing is controlled to be a second speed value, wherein, when the number of printed sheets printed by the machine at the second speed value reaches a set sheet value, the timer is reset to zero, and the printing speed of the machine is controlled to resume to the first speed value.

[0082] Preferably, it also includes a start button and a stop button respectively connected to the PLC controller. When the stop button is pressed, the PLC controller controls the printing head translation motor to stop working regardless of whether there is material at each feeding end. The PLC controller can control the printing head translation motor to work again only after the start button is pressed.

[0083] Preferably, it also includes an alarm connected to the PLC controller. When the alarm sounds, regardless of whether there is material at each feeding end, the PLC controller controls the printing head translation motor to stop working. The PLC controller can control the printing head translation motor to work again only after resetting and eliminating the alarm.

[0084] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. An intelligent control method for printing speed, characterized in that: The intelligent control method of printing speed includes: Step S1: Obtain the current operating status of the machine; Step S2: When the current operation state of the machine is the printing stop state, the control timer is started and starts timing; Step S3: During the timing process of the timer, when the current operating state of the machine returns to the printing state, controlling the timer to stop timing; Step S4: obtaining the time duration between when the timer starts to count and when it stops counting, wherein the time duration between when the timer starts to count and when it stops counting is the downtime of the machine; Step S5: controlling the printing speed of the machine after it resumes printing according to the downtime of the machine; The controlling of the printing speed of the machine after the machine resumes printing according to the downtime of the machine includes: Determining whether the downtime of the machine is less than or equal to a preset downtime threshold; If yes, controlling the printing speed of the machine to be the first speed value after resuming printing, and returning the timer to zero; If not, the printing speed of the machine after resuming printing is controlled to be a second speed value, wherein, when the number of printed sheets printed by the machine at the second speed value reaches a set number of printed sheets, the timer is reset to zero, and the printing speed of the machine is controlled to be restored to the first speed value; wherein, the second speed value is less than the first speed value.

2. An intelligent control device for printing speed, characterized in that: The intelligent control device for printing speed comprises: The first acquisition module is used to obtain the current operating status of the machine; A first control module is used to control the timer to start and start timing when the current operating state of the machine is a printing stop state; A second control module is used to control the timer to stop timing when the current operating state of the machine returns to the printing state during the timing of the timer; A second acquisition module is used to acquire the timing duration between the start and stop of the timer, wherein the timing duration between the start and stop of the timer is the downtime duration of the machine; A third control module is used to control the printing speed of the machine after the machine resumes printing according to the downtime of the machine; The controlling of the printing speed of the machine after the machine resumes printing according to the downtime of the machine includes: Determining whether the downtime of the machine is less than or equal to a preset downtime threshold; If yes, controlling the printing speed of the machine to be the first speed value after resuming printing, and returning the timer to zero; If not, the printing speed of the machine after resuming printing is controlled to be a second speed value, wherein, when the number of printed sheets printed by the machine at the second speed value reaches a set number of printed sheets, the timer is reset to zero, and the printing speed of the machine is controlled to be restored to the first speed value; wherein, the second speed value is less than the first speed value.

3. An intelligent control system for printing speed, characterized in that: It comprises a PLC controller and a photoelectric sensor, a printing head translation motor and a timer respectively connected to the PLC controller, and the PLC controller comprises the intelligent control device for printing speed according to claim 2, wherein: The photoelectric sensor is installed at a fixed position at each feeding end, and is used to detect whether there is material at each feeding end, and send the detection result of each feeding end to the PLC controller; The PLC controller is used to control the operation of the printing head translation motor according to the detection results of each feeding end; wherein, when there is material at each feeding end, the printing head translation motor starts to work, and the current operation state of the machine is the printing state; when there is no material at each feeding end, the printing head translation motor stops working, and the current operation state of the machine is the stop printing state; The timer is used to start and begin timing when the PLC controller determines that the current operating state of the machine is a printing stop state; and during the timing process, when the PLC controller determines that the current operating state of the machine is restored to a printing state, stop timing; and use the timing duration from the start of timing to the stop of timing as the downtime of the machine and send it to the PLC controller; The PLC controller can control the printing speed of the machine after it resumes printing according to the downtime of the machine.

4. The intelligent control system for printing speed according to claim 3 is characterized in that: The PLC controller determines whether the downtime of the machine is less than or equal to a preset downtime threshold; If yes, controlling the printing speed of the machine to be the first speed value after resuming printing, and returning the timer to zero; If not, the printing speed of the machine after resuming printing is controlled to be a second speed value, wherein, when the number of printed sheets printed by the machine at the second speed value reaches a set sheet value, the timer is reset to zero, and the printing speed of the machine is controlled to resume to the first speed value.

5. The intelligent control system for printing speed according to claim 3 is characterized in that: It also includes a start button and a stop button respectively connected to the PLC controller. When the stop button is pressed, the PLC controller controls the printing head translation motor to stop working regardless of whether there is material at each feeding end. The PLC controller can control the printing head translation motor to work again only after the start button is pressed.

6. The intelligent control system for printing speed according to claim 3, characterized in that: It also includes an alarm connected to the PLC controller. When the alarm sounds, the PLC controller controls the printing head translation motor to stop working regardless of whether there is material at each feeding end. The PLC controller can control the printing head translation motor to work again only after resetting and eliminating the alarm.

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