UV printing platform ink supply system

Abstract

The invention discloses an ink supply system for a UV printing platform. The ink supply system comprises a negative pressure air tank, an air bottle, a secondary ink box, an ink pump, a filter and a primary ink box which are distributed at intervals. The monitoring and reminding device comprises a PLC (Programmable Logic Controller) mounted on the front surface of the negative pressure gas tank, a bottom box for protecting the filter, and a communication opening formed in the top of the bottom box; the filter has the beneficial effects that by arranging the monitoring reminding device, the pressure difference between the liquid inlet and the liquid outlet of the filter can be monitored in real time; when the filtering performance of the filter is reduced, the filter element in the filter is gradually blocked, so that the pressure difference between the liquid inlet and the liquid outlet is increased; when the pressure difference exceeds a preset threshold value, the alarm can send out an alarm signal in time to remind a worker to replace the filter element; the filter can be guaranteed to keep good filtering performance all the time, the quality of printing ink entering follow-up components is guaranteed, stable operation of an ink supply system is maintained, and then the printing quality and efficiency of a UV printing platform are guaranteed.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of UV printing platform, and particularly relates to a UV printing platform ink supply system. BACKGROUND

[0002] The UV printing platform is a printing device or system based on UV curing technology, which realizes high-efficiency and high-quality printing effect by rapidly curing ink through an ultraviolet light source.

[0003] The UV printing platform ink supply system with the publication number CN214514229U comprises a primary stirring ink storage box, a first filter in communication with a liquid inlet and a liquid outlet of the primary stirring ink storage box, an ink pump in communication with the liquid inlet and a liquid outlet of the first filter, a secondary ink storage box in communication with the liquid inlet and a liquid outlet of the ink pump, and a negative pressure air supply device in communication with an air inlet of the secondary ink storage box.

[0004] However, in the above prior art, when the filtering performance of the filter decreases, it is not conducive to timely reminding the staff to replace the filter element, which will affect the use performance of the ink supply system, and thus may lead to a decrease in printing quality, failing to meet the efficient and high-quality printing requirements. SUMMARY

[0005] The purpose of the present application is to provide a UV printing platform ink supply system to solve the problem that the existing UV printing platform ink supply system cannot timely remind the staff to replace the filter element when the filtering performance of the filter decreases, affecting the use performance.

[0006] To achieve the above purpose, the present application provides the following technical scheme: a UV printing platform ink supply system comprising a negative pressure air tank, an air bottle, a secondary ink storage box, an ink pump, a filter, and a primary ink storage box distributed at intervals; further comprising a monitoring and reminding device, the monitoring and reminding device comprising a PLC programmable controller installed on the front surface of the negative pressure air tank, a bottom box for protecting the filter, a communication port opened on the top of the bottom box, a fixed cover detachably connected with the bottom box, a filter element detachably arranged in the filter, a pull plate arranged on the top of the filter element, a sealing gasket arranged on the bottom of the pull plate and outside the filter element, a negative pressure air tank installed on one side of the support seat, and a sensor installed in the filter, wherein the sensor and the alarm are electrically connected with the PLC programmable controller.

[0007] As a preferred technical scheme of the present application, it further comprises a plug plate arranged on the bottom of the fixed cover, a plug slot opened on the top of the bottom box for the plug plate to be inserted, a limiting groove opened on the side surface of the plug plate, and a limiting rod rotatably arranged in the limiting groove on the bottom box.

[0008] As a preferred technical scheme of the present application, the baffle is arranged on the inner side of the slot and can abut against the plugboard.

[0009] As a preferred technical scheme of the present application, the servo motor is arranged on the primary ink box, and the output end of the servo motor extends into the primary ink box and is connected with the stirring rod.

[0010] As a preferred technical scheme of the present application, the stirring rod is provided with a connecting cylinder, and the connecting cylinder is provided with a scraper.

[0011] As a preferred technical scheme of the present application, the liquid inlet of the filter is connected with the liquid outlet of the primary ink box through a pipeline, the liquid outlet of the filter is connected with the liquid inlet of the ink pump through a pipeline, the liquid outlet of the ink pump is connected with the liquid inlet of the secondary ink box through a pipeline, the liquid outlet of the secondary ink box is connected with the nozzle of the UV flatbed printer through a pipeline, and the gas inlet of the secondary ink box is connected with the negative pressure gas tank through a pipeline.

[0012] As a preferred technical scheme of the present application, the first liquid level sensor is arranged in the primary ink box, and the second liquid level sensor is arranged in the secondary ink box.

[0013] As a preferred technical scheme of the present application, the support seat supporting the negative pressure gas tank is further provided, and the PLC programmable controller is provided with a processing unit.

[0014] Compared with the prior art, the present application has the following beneficial effects:

[0015] By arranging the monitoring and reminding device, the pressure difference between the liquid inlet and the liquid outlet of the filter can be monitored in real time. When the filtering performance of the filter decreases, the filter element inside the filter will be gradually blocked, resulting in an increase in the pressure difference between the liquid inlet and the liquid outlet. When the pressure difference exceeds the preset threshold value, the alarm will timely send an alarm signal to remind the staff to replace the filter element. The filter can always maintain good filtering performance, ensuring the quality of the ink entering the subsequent components and maintaining the stable operation of the ink supply system, thereby ensuring the printing quality and efficiency of the UV printing platform, and solving the problem that the filter cannot be timely replaced when the filtering performance decreases in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The figure is a structural schematic diagram of the present application.

[0017] Figure 2 The figure is a front view of the present application.

[0018] Figure 3 The figure is a schematic diagram of the fixed cover and the bottom box splicing structure of the present application.

[0019] Figure 4The schematic structural diagram of the system part of the present application is shown in the figure.

[0020] In the figure: 1, support seat; 11, negative pressure air tank; 12, alarm; 2, PLC programmable controller; 3, air bottle; 4, secondary ink box; 5, ink pump; 61, bottom box; 610, communication port; 6101, slot; 62, fixed cover; 620, plugboard; 6201, limiting groove; 63, filter; 64, pull plate; 65, filter element; 650, gasket; 7, primary ink box; 71, servo motor; 710, connecting cylinder; 7101, scraper; 8, limiting rod; 9, baffle. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0022] Embodiment 1

[0023] Please refer to Figures 1-4 For the first embodiment of the present application, the embodiment provides a UV printing platform ink supply system, which comprises negative pressure air tanks 11, air bottles 3, secondary ink boxes 4, ink pumps 5, filters 63, and primary ink boxes 7, which are distributed at intervals. The system further comprises a monitoring and reminding device. The monitoring and reminding device is provided to realize real-time monitoring and reminding functions of the system. The monitoring and reminding device comprises a PLC programmable controller 2 installed on the front surface of the negative pressure air tank 11. The PLC programmable controller 2 serves as a control core, can receive sensor signals and control the alarm 12 to work, and protects the filter 63. The bottom box 61 of the filter 63 plays a protective role for the filter 63. The communication port 610 is opened on the top of the bottom box 61. The fixed cover 62 is detachably connected with the bottom box 61. The detachable connection of the fixed cover 62 with the bottom box 61 facilitates maintenance of the filter 63 through the communication port 610. The filter element 65 is detachably arranged in the filter 63. The pull plate 64 is arranged on the top of the filter element 65. The gasket 650 is arranged on the bottom of the pull plate 64 and outside the filter element 65. The detachable arrangement of the filter element 65 facilitates replacement. The pull plate 64 facilitates extraction of the filter element 65. The gasket 650 enhances the sealing performance of the filter element 65 after installation, preventing ink leakage. The negative pressure air tank 11 is installed on one side of the support seat 1. The sensor is installed in the filter 63. The sensor and the alarm 12 are electrically connected with the PLC programmable controller 2. The sensor can monitor the state of the filter 63 in real time, ensuring stable operation of the system.

[0024] In the embodiment, preferably, the fixing cover 62 further comprises an insertion plate 620 arranged at the bottom of the fixing cover 62, an insertion slot 6101 arranged at the top of the bottom box 61 and configured to receive the insertion plate 620, a limiting groove 6201 arranged at the side surface of the insertion plate 620, and a limiting rod 8 arranged on the bottom box 61 and configured to be screwed into the limiting groove 6201. The connection structure of the fixing cover 62 and the bottom box 61 is further refined. The insertion plate 620 is inserted into the insertion slot 6101 to achieve preliminary positioning, and the limiting rod 8 is screwed into the limiting groove 6201 to fix the insertion plate 620. This connection mode not only makes the disassembly and assembly of the fixing cover 62 and the bottom box 61 more convenient, but also ensures the stability and firmness of the connection, facilitating the maintenance of the filter 63 and the replacement of the filter element 65.

[0025] In the embodiment, preferably, the fixing cover 62 further comprises an insertion plate 620 arranged at the bottom of the fixing cover 62, an insertion slot 6101 arranged at the top of the bottom box 61 and configured to receive the insertion plate 620, a limiting groove 6201 arranged at the side surface of the insertion plate 620, and a limiting rod 8 arranged on the bottom box 61 and configured to be screwed into the limiting groove 6201. The connection structure of the fixing cover 62 and the bottom box 61 is further refined. The insertion plate 620 is inserted into the insertion slot 6101 to achieve preliminary positioning, and the limiting rod 8 is screwed into the limiting groove 6201 to fix the insertion plate 620. This connection mode not only makes the disassembly and assembly of the fixing cover 62 and the bottom box 61 more convenient, but also ensures the stability and firmness of the connection, facilitating the maintenance of the filter 63 and the replacement of the filter element 65.

[0026] In the embodiment, preferably, the fixing cover 62 further comprises an insertion plate 620 arranged at the bottom of the fixing cover 62, an insertion slot 6101 arranged at the top of the bottom box 61 and configured to receive the insertion plate 620, a limiting groove 6201 arranged at the side surface of the insertion plate 620, and a limiting rod 8 arranged on the bottom box 61 and configured to be screwed into the limiting groove 6201. The connection structure of the fixing cover 62 and the bottom box 61 is further refined. The insertion plate 620 is inserted into the insertion slot 6101 to achieve preliminary positioning, and the limiting rod 8 is screwed into the limiting groove 6201 to fix the insertion plate 620. This connection mode not only makes the disassembly and assembly of the fixing cover 62 and the bottom box 61 more convenient, but also ensures the stability and firmness of the connection, facilitating the maintenance of the filter 63 and the replacement of the filter element 65.

[0027] In the embodiment, preferably, the inlet of the filter 63 is connected to the outlet of the primary ink box 7 through a pipeline, the outlet of the filter 63 is connected to the inlet of the ink pump 5 through a pipeline, the outlet of the ink pump 5 is connected to the inlet of the secondary ink box 4 through a pipeline, the outlet of the secondary ink box 4 is connected to the nozzle of the UV flatbed printer through a pipeline, and the gas inlet of the secondary ink box 4 is connected to the negative pressure air tank 11 through a pipeline. The negative pressure air tank 11 provides negative pressure for the secondary ink box 4, ensuring the stability and continuity of ink output.

[0028] In the embodiment, preferably, the first liquid level sensor is arranged in the primary ink box 7, and the second liquid level sensor is arranged in the secondary ink box 4. The first liquid level sensor and the second liquid level sensor can respectively monitor the liquid level of the ink in the primary ink box 7 and the secondary ink box 4 in real time. When the liquid level is lower or higher than the preset value, a signal can be sent in time to remind the staff to add or process the ink, avoiding the abnormal liquid level affecting the normal printing work and improving the automation and reliability of the system.

[0029] In this embodiment, preferably, it also includes a support seat 1 supporting the negative pressure gas tank 11, the support seat 1 provides stable support for the negative pressure gas tank 11, prevents the negative pressure gas tank 11 from toppling over, ensures the safety of the equipment, and the PLC programmable controller 2 is internally provided with a processing unit capable of analyzing and processing signals transmitted by sensors and controlling the work of the alarm 12 and other components according to the processing result, ensuring the normal operation of the monitoring and reminding device and improving the intelligent level of the system.

[0030] The processing unit is based on modular programming and mainly includes the following functional modules.

[0031] An initialization module: when the system starts, the microprocessor, signal acquisition module, control output module and storage module are initialized and configured, the sampling frequency of the sensor is set, the initial value of the preset threshold is set, and whether each hardware component is working normally is detected;

[0032] A data acquisition and preprocessing module: the digital signals of each sensor are read at the set sampling frequency, the data are filtered (such as using the moving average method to remove high-frequency noise), and abnormal values (such as signals exceeding the reasonable range) are eliminated, to obtain stable real-time monitoring data (such as filter inlet / outlet pressure values, primary / secondary ink cartridge liquid level values);

[0033] A threshold judgment module: the real-time data after preprocessing are compared with the preset threshold in the storage module.

[0034] For the filter 63, the pressure difference between the inlet and outlet is calculated, and if the difference exceeds the preset threshold, it is determined that the filter element 65 is blocked, triggering the alarm condition;

[0035] For the primary ink cartridge 7 and the secondary ink cartridge 4, if the liquid level value is lower than the preset lower limit or higher than the preset upper limit, it is determined that the liquid level is abnormal, triggering the alarm condition;

[0036] A control execution module: when the threshold judgment module triggers the alarm condition, the microprocessor sends a start signal to the alarm 12 through the control output module, and stores the alarm information (such as alarm type, triggering time, real-time data value) into the Flash memory for subsequent query; if the alarm condition is removed (such as the pressure difference returns to normal after replacing the filter element, the liquid level returns to the normal range after supplementing the ink), a stop signal is sent to turn off the alarm 12;

[0037] A real-time monitoring stage: the processing unit cyclically executes data acquisition and preprocessing at a fixed period (such as 100 ms / time) to continuously update the real-time monitoring data;

[0038] A dynamic judgment stage: after collecting data each time, the threshold judgment is immediately executed, and if the alarm condition is met, the control execution module is triggered within 10 ms to start the alarm 12;

[0039] Data interaction stage: support the communication interface (such as RS485, EtherNet / IP) with host computer (such as factory monitoring system) through PLC, upload real-time monitoring data, alarm information and system status, and can receive the threshold modification instruction issued by the host computer, realize remote configuration.

[0040] Embodiment 2

[0041] Please refer to Figures 1-4 , the second embodiment of the application, which is based on the last embodiment, the difference is:

[0042] The stirring rod is provided with a connecting barrel 710, and a scraper 7101 is installed on the connecting barrel 710. When the scraper 7101 rotates with the stirring rod, it can scrape the inner wall of the first ink box 7, avoid the ink remaining in the inner wall of the first ink box 7, reduce the waste of ink, and ensure the cleanliness of the inside of the first ink box 7, which is beneficial to prolong the service life of the equipment.

[0043] The working principle and use process of the application: check whether the connection of each part is normal, ensure that there is sufficient ink in the first ink box 7; place the support seat 1 in a stable position, ensure that the negative pressure gas tank 11 is stably installed on one side of the support seat 1; turn on the system through the PLC programmable controller 2, at this time the processing unit starts initialization, the sensor, alarm 12 and other equipment enter standby state;

[0044] The servo motor 71 on the first ink box 7 starts, and its output end drives the stirring rod to rotate; the connecting barrel 710 on the stirring rod rotates at the same time, and the scraper 7101 on the connecting barrel 710 scrapes the inner wall of the first ink box 7, while the stirring rod fully stirs the ink to prevent the ink from precipitating and stratifying, and ensures the uniformity of the ink;

[0045] The ink in the first ink box 7 is transported to the inlet of the filter 63 through the pipeline; after the ink enters the filter 63, it is filtered by the filter element 65 inside, and the impurities are removed; the filtered ink enters the inlet of the ink pump 5 from the outlet of the filter 63 through the pipeline, and under the action of the ink pump 5, the ink is pumped into the inlet of the second ink box 4;

[0046] The negative pressure gas tank 11 is communicated with the gas inlet of the second ink box 4 through the pipeline, and provides a negative pressure environment for the second ink box 4, to ensure the stability and continuity of the ink output;

[0047] The ink in the second ink box 4 is transported to the nozzle of the UV flatbed printer through the pipeline, and the nozzle sprays the ink onto the printing material to complete the printing work;

[0048] The sensor inside the filter 63 monitors its state in real time and transmits signals to the PLC programmable controller 2; when the filter 63 is abnormal, the PLC programmable controller 2 controls the alarm 12 to issue an alarm signal;

[0049] The first liquid level sensor in the primary ink cartridge 7 and the second liquid level sensor in the secondary ink cartridge 4 monitor the ink level in real time, and when the liquid level is lower or higher than the preset value, signals are transmitted to the PLC programmable controller 2, and the PLC programmable controller 2 controls the alarm 12 to issue an alarm signal to remind the staff to take corresponding measures;

[0050] When the filter 63 needs to be maintained or the filter element 65 needs to be replaced, the limiting rod 8 on the bottom box 61 is unscrewed, the limiting rod 8 is separated from the limiting groove 6201 on the side surface of the plug-in plate 620, and then the fixed cover 62 is removed from the bottom box 61; the filter element 65 is taken out from the inside of the filter 63 through the pull plate 64, and after replacing the new filter element 65, it is put back into the filter 63, and the sealing gasket 650 ensures the sealing performance after the installation of the filter element 65; then the plug-in plate 620 at the bottom of the fixed cover 62 is inserted into the insertion slot 6101 at the top of the bottom box 61, the baffle 9 on the inner side of the insertion slot 6101 abuts against the plug-in plate 620, ensuring that the plug-in plate 620 is installed in place, and finally the limiting rod 8 is screwed in to fix the plug-in plate 620.

[0051] Although the embodiments of the present application have been shown and described in detail, as described above, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A UV printing platform ink supply system, characterized by: The invention comprises a negative pressure gas tank (11), an air bottle (3), a secondary ink cartridge (4), an ink pump (5), a filter (63), and a primary ink cartridge (7) which are arranged at intervals; and a monitoring and reminding device, wherein the monitoring and reminding device comprises a PLC programmable controller (2) installed on the front surface of the negative pressure gas tank (11), a bottom box (61) for protecting the filter (63), a communication port (610) opened on the top of the bottom box (61), a fixed cover (62) detachably connected to the bottom box (61), a filter element (65) detachably arranged inside the filter (63), a pull plate (64) arranged on the top of the filter element (65), a sealing gasket (650) arranged at the bottom of the pull plate (64) and located outside the filter element (65), a negative pressure gas tank (11) installed on one side of the support seat (1), and a sensor installed inside the filter (63), wherein the sensor and the alarm (12) are both electrically connected to the PLC programmable controller (2).

2. The UV printing platform ink supply system according to claim 1, characterized in that: The invention also includes an inserting plate (620) arranged at the bottom of the fixed cover (62), a slot (6101) provided on the top of the bottom box (61) for inserting the inserting plate (620), a limiting groove (6201) provided on the side surface of the inserting plate (620), and a limiting rod (8) provided on the bottom box (61) and capable of being screwed into the limiting groove (6201).

3. The UV printing platform ink supply system according to claim 2, characterized in that: It also includes a baffle (9) which is arranged on the inner side of the slot (6101) and can be pressed against the inserting plate (620).

4. The UV printing platform ink supply system according to claim 1, characterized in that: It also includes a servo motor (71) mounted on the first-level ink cartridge (7), and the output end of the servo motor (71) extends to the interior of the first-level ink cartridge (7) and is connected to a stirring rod.

5. The UV printing platform ink supply system according to claim 4, characterized in that: A connecting cylinder (710) is installed on the stirring rod, and a scraper (7101) is installed on the connecting cylinder (710).

6. The UV printing platform ink supply system according to claim 1, characterized in that: The liquid inlet of the filter (63) is connected to the liquid outlet of the primary ink cartridge (7) via a pipeline, the liquid outlet of the filter (63) is connected to the liquid inlet of the ink pump (5) via a pipeline, the liquid outlet of the ink pump (5) is connected to the liquid inlet of the secondary ink cartridge (4) via a pipeline, the liquid outlet of the secondary ink cartridge (4) is connected to the nozzle of the UV flatbed printer via a pipeline, and the air inlet of the secondary ink cartridge (4) is connected to the negative pressure gas tank (11) via a pipeline.

7. The UV printing platform ink supply system according to claim 1, characterized in that: A first liquid level sensor is installed inside the primary ink cartridge (7), and a second liquid level sensor is installed inside the secondary ink cartridge (4).

8. The UV printing platform ink supply system according to claim 1, characterized in that: It also includes a support base (1) for supporting the negative pressure gas tank (11), and a processing unit is provided inside the PLC programmable controller (2).

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