阅读说明：本技术 一种自动清洗喷墨打印喷头装置 (Automatic wash inkjet printing shower nozzle device ) 是由 叶芸 秦新智 郭太良 段燕宇 陈恩果 徐胜 于 2021-07-02 设计创作，主要内容包括：本发明涉及一种自动清洗喷墨打印喷头装置。包括蓄液池、清洗池、离心泵、激光发生器、光接收器、缓冲检测区、废液池、计算机。激光发生器发射激光照射缓冲检测区检测墨水,经过墨水的反射折射及吸收后被安置于缓冲检测区下端的光接收器接收,转换变为电信号,然后经过A/D转换反馈到计算机进行数据的处理分析,得到电压幅值与时间的曲线,当电压幅值与多种清洗液所对应的设定阈值之间的误差在±10%以外时,自动打开离心泵的控制开关,将喷头中残留的墨水进行清洗,并排到废液池中。本发明能够精确检测墨水的存在,自动清洗喷头并排出废液,且通过耦合清洗装置,使得喷头稳定性提高,减少喷头堵塞,减少喷嘴器械磨损,缩短打印周期,节约生产成本。(The invention relates to a device for automatically cleaning an ink-jet printing nozzle. The device comprises a liquid storage tank, a cleaning tank, a centrifugal pump, a laser generator, a light receiver, a buffer detection area, a waste liquid tank and a computer. Laser generator transmission laser shines buffering detection zone and detects ink, settle the photoreceiver in buffering detection zone lower extreme after the reflection refraction and the absorption of ink and receive, the conversion becomes the signal of telecommunication, then carry out the processing analysis of data through AD conversion feedback to the computer, obtain the curve of voltage amplitude and time, when the error between the settlement threshold value that voltage amplitude and multiple washing liquid correspond is when outside 10%, the control switch of automatic turn-on centrifugal pump, wash remaining ink in the shower nozzle, arrange the waste liquid pond in. The invention can accurately detect the existence of ink, automatically clean the spray head and discharge waste liquid, and improve the stability of the spray head, reduce the blockage of the spray head, reduce the abrasion of a nozzle instrument, shorten the printing period and save the production cost by a coupling cleaning device.)

1. An automatic cleaning ink-jet printing nozzle device is characterized by comprising a liquid storage tank, a cleaning tank, a centrifugal pump, a laser generator, a light receiver, a buffer detection area, a waste liquid tank and a computer; wash the pond and be connected with the buffering detection zone through the centrifugal pump, make the mixed liquid of ink in the washing pond flow in the buffering detection zone, laser generator transmission laser shines buffering detection zone and detects the mixed liquid of ink, the reflection of ink in the mixed liquid of ink is passed through to laser, receive by light receiver after refraction and absorption, and convert to the signal of telecommunication, then transmit and handle the analysis for the computer, obtain the curve of amplitude of voltage and time, when the error between the settlement threshold value that amplitude of voltage and washing liquid correspond is when + -10% beyond, the control switch of automatic open centrifugal pump, wash remaining ink in the shower nozzle, discharge to the waste liquid pond in side by side.

2. An apparatus according to claim 1, wherein the reservoir is adapted to store cleaning fluid and is connected to the cleaning reservoir via a cleaning reservoir valve.

3. An apparatus as claimed in claim 2, wherein said reservoir is located at the inlet of the apparatus, and the valve of the reservoir is controlled by the computer to supply different types of cleaning liquid to the reservoir, and the cleaning liquid in the reservoir is kept relatively full by the reservoir since the cleaning liquid in the reservoir will be continuously subjected to the nozzle cleaning during the automatic cleaning process.

4. A self-cleaning inkjet print head apparatus as recited in claim 2 wherein said cleaning fluid comprises: polar solvents are selected for water-soluble ink, and non-polar solvents are selected for fat-soluble ink.

5. An apparatus for automatically cleaning inkjet print heads according to claim 1 wherein said waste reservoir is connected to the cleaning reservoir by a centrifugal pump for discharging ink remaining in the heads cleaned by the cleaning reservoir.

6. An automatic cleaning ink jet printing head device according to claim 5, wherein said centrifugal pump is composed of an impeller and a pump shaft rotating at high speed, the suction port of the centrifugal pump is connected with the cleaning tank, and the discharge port of the centrifugal pump is connected with the waste liquid tank; the computer controls the centrifugal pump to start and then drives the impeller to rotate at a high speed, the mixed liquid in the centrifugal pump moves radially from inside to outside, the ink mixed liquid in the cleaning pool obtains energy, the flow rate is increased, the ink remained in the nozzle is sucked into the cleaning pool and cleaned, and the ink is discharged into the buffer detection area and the waste liquid pool through the center of the impeller.

7. The apparatus according to claim 1, wherein the laser generator is installed at an upper end of the buffer detection area, and the laser generator generates laser to irradiate the ink mixed liquid in the buffer detection area without dead angles, and when the ink exists in the ink mixed liquid, the laser is attenuated during transmission due to reflection, refraction and absorption of the laser by the ink.

8. The apparatus of claim 1, wherein the optical receiver is installed at a lower end of the buffer detection area, receives and records laser light reflected, refracted and absorbed by the ink in the ink mixture, converts the optical signal into an electrical signal through photoelectric conversion, and feeds the electrical signal back to the computer through a/D conversion for processing and analysis, so as to obtain a voltage amplitude-time curve, and when an error between the voltage amplitude and a set threshold corresponding to the cleaning liquid is within ± 10%, the computer automatically controls the valve of the cleaning tank to open and the centrifugal pump to start cleaning the nozzle in the cleaning tank and discharge the ink mixture.

9. The apparatus of claim 1, wherein the housing of the buffer detection area is transparent and connected to a centrifugal pump, and is used for buffering the high speed ink mixture, reducing the mechanical loss of the ink mixture to the impeller, and the ink mixture in the buffer detection area is also used for detecting and feeding back information to the computer.

10. The apparatus according to claim 5 or 6, wherein the waste tank is connected to the outlet of the centrifugal pump, the waste liquid of the ink mixture is stored in the waste tank for a short time without contaminating the cleaning tank and the centrifugal pump, and the waste tank is disassembled and the waste liquid of the ink mixture is discharged after the automatic cleaning apparatus stops operating.

Technical Field

The invention belongs to the technical field of printing devices, and relates to a device for automatically cleaning an ink-jet printing nozzle.

Background

Ink-jet printing is the mainstream technology for manufacturing OLED display panels in enterprises and colleges nowadays, and from the first global ink-jet printer and the emergence of piezoelectric ink control technology in 1976, the first 55-inch 4K AMQLED display screen is developed in Jingdong in 2021 by adopting ink-jet printing quantum dot display technology. As short as 45 years, the ink-jet printing technology stands out from a plurality of manufacturing processes by virtue of the advantages of high flexibility, high precision and high quality, and the ink-jet printing technology shows great development potential. Although the ink-jet printing technology has already occupied the leading position of the market, the technology initiation and development in China are relatively laggard and are in the primary stage of the ink-jet printing technology, and if the structure and the material composition of an ink-jet printing device and a nozzle in foreign countries can be overcome, the ink-jet printing device and the nozzle can better adapt to the revolution and development of the times. The ink-jet printing technology is promoted towards informatization and artificial intelligence, so that the printing speed and the pattern quality can be better improved.

When the sprayer is placed for a long time, the evaporation rate difference between the ink inside the nozzle and the ink on the gas-liquid interface is generated, so that the ink solute generates crystallization near the fine nozzle gas-liquid interface, the sprayer cannot stably spray, and the blockage phenomenon further occurs. The nozzle is usually cleaned by a soaking method, a distilled water cleaning method, an ultrasonic instrument cleaning method, a manual wiping method, and a knife-hanging wiping method. However, the soaking method requires a long time, and cannot solve the emergency problem, while the ultrasonic instrument is high in maintenance cost during cleaning, and frequent use easily causes unrepairable mechanical damage to the nozzle, and the manual wiping method has complicated processes, so that the printing efficiency is reduced.

Disclosure of Invention

The invention aims to solve the process problems of the existing ink-jet printing and provides a device for automatically cleaning an ink-jet printing nozzle.

In order to achieve the purpose, the technical scheme of the invention is as follows: an automatic cleaning ink-jet printing nozzle device comprises a liquid storage tank, a cleaning tank, a centrifugal pump, a laser generator, a light receiver, a buffer detection area, a waste liquid tank and a computer; wash the pond and be connected with the buffering detection zone through the centrifugal pump, make the mixed liquid of ink in the washing pond flow in the buffering detection zone, laser generator transmission laser shines buffering detection zone and detects the mixed liquid of ink, the reflection of ink in the mixed liquid of ink is passed through to laser, receive by light receiver after refraction and absorption, and convert to the signal of telecommunication, then transmit and handle the analysis for the computer, obtain the curve of amplitude of voltage and time, when the error between the settlement threshold value that amplitude of voltage and washing liquid correspond is when + -10% beyond, the control switch of automatic open centrifugal pump, wash remaining ink in the shower nozzle, discharge to the waste liquid pond in side by side.

In an embodiment of the present invention, the liquid storage tank is used for storing the cleaning liquid, and the liquid storage tank is connected to the cleaning tank through a cleaning tank valve.

In one embodiment of the invention, the liquid storage tank is positioned at the inlet of the device, the valve of the cleaning tank can be controlled by a computer to provide different types of cleaning liquid for the cleaning tank, and the cleaning liquid in the liquid storage tank can be combined with the liquid storage tank to keep the cleaning liquid in the cleaning tank relatively sufficient because the cleaning liquid in the liquid storage tank can be continuously cleaned by the spray head in the automatic cleaning process.

In an embodiment of the present invention, the cleaning solution includes: polar solvents (such as PEDOT: PSS ink, water is used as a cleaning liquid) are selected for water-soluble ink, and non-polar solvents (such as carbon tetrachloride is used as a cleaning liquid) are selected for fat-soluble ink.

In an embodiment of the invention, the waste liquid tank is connected with the cleaning tank through a centrifugal pump and is used for discharging ink remained in the nozzle cleaned by the cleaning tank.

In one embodiment of the invention, the centrifugal pump consists of an impeller and a pump shaft which rotate at a high speed, a suction inlet of the centrifugal pump is connected with the cleaning pool, and a discharge outlet of the centrifugal pump is connected with the waste liquid pool; the computer controls the centrifugal pump to start and then drives the impeller to rotate at a high speed, the mixed liquid in the centrifugal pump moves radially from inside to outside, the ink mixed liquid in the cleaning pool obtains energy, the flow rate is increased, the ink remained in the nozzle is sucked into the cleaning pool and cleaned, and the ink is discharged into the buffer detection area and the waste liquid pool through the center of the impeller.

In an embodiment of the invention, the laser generator is installed at the upper end of the buffer detection area, laser generated by the laser generator irradiates the ink mixed liquid in the buffer detection area without dead angles, and when ink exists in the ink mixed liquid, the laser attenuates in the transmission process due to the reflection, refraction and absorption of the ink to the laser.

In an embodiment of the invention, the optical receiver is installed at the lower end of the buffer detection area, receives and records laser light reflected, refracted and absorbed by ink in the ink mixed liquid, converts an optical signal into an electrical signal through photoelectric conversion, and feeds back the electrical signal to a computer for processing and analysis through A/D conversion to obtain a curve of voltage amplitude and time, and when an error between the voltage amplitude and a set threshold corresponding to a cleaning liquid is beyond +/-10%, the computer automatically controls the opening of a valve of the cleaning pool and the starting of a centrifugal pump to clean a nozzle in the cleaning pool and discharge ink mixed liquid.

In an embodiment of the present invention, the casing of the buffer detection area is transparent and is connected to the centrifugal pump, so as to buffer the high-speed ink mixture, reduce the mechanical loss of the ink mixture to the impeller, and the ink mixture in the buffer detection area is also used for detecting and feeding back information to the computer.

In an embodiment of the present invention, the waste liquid tank is connected to the discharge port of the centrifugal pump, the waste liquid of the ink mixture is temporarily stored in the waste liquid tank, and the waste liquid tank does not contaminate the cleaning tank and the centrifugal pump.

Compared with the prior art, the invention has the following beneficial effects: the device has the function of automatically cleaning residual ink in the ink-jet printing nozzle, and can reduce the nozzle blockage, improve the stability of the nozzle and the ink, improve the printing efficiency, shorten the printing period and save the production cost by coupling the ink-jet printer with the automatic cleaning device according to the receiving and sending of the information of the computer, the ink detection of the laser generator and the light receiving in the buffer detection area and the extraction and cleaning of the ink of the nozzle by the centrifugal pump.

Drawings

Fig. 1 is a schematic view of the entire automatic cleaning inkjet printing head apparatus.

In the figure: the device comprises an ink chamber 1, an ink pipeline 2, an ink channel 3, an ink storage chamber 4, a cleaning tank 5, a liquid storage tank 6, a cleaning tank valve 7, ink 8, a centrifugal pump valve 9, a laser generator 10, an optical receiver 11, a buffer detection area 12, a centrifugal pump 13 and a waste liquid tank 14.

FIG. 2 is a schematic diagram of a computer control system.

Fig. 3 is a schematic view of the working process of the automatic cleaning device.

Detailed Description

The technical scheme of the invention is specifically explained below with reference to the accompanying drawings.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

As shown in fig. 1 to 3, the automatic cleaning inkjet printing head device of the present embodiment mainly includes a liquid storage tank 6, a cleaning tank 5, a centrifugal pump 13, a laser generator 10, a light receiver 11, a buffer detection area 12, a waste liquid tank 14, and a computer, and the head mainly includes an ink chamber 1, an ink pipe 2, an ink channel 3, and an ink storage chamber 4.

The liquid storage tank is positioned at the inlet of the device, the cleaning tank valve 7 can be controlled by a computer to provide different types of cleaning liquid for the cleaning tank, polar solvent (such as PEDOT: PSS ink) is selected as the cleaning liquid for water-soluble ink, and nonpolar solvent (such as carbon tetrachloride) is selected as the cleaning liquid for fat-soluble ink, and the cleaning liquid in the liquid storage tank can be kept relatively sufficient by combining the liquid storage tank because the cleaning liquid in the liquid storage tank can be continuously cleaned by a sprayer in the automatic cleaning process;

the cleaning pool is connected to the outlet end of the liquid storage pool, and the valve of the cleaning pool can control the opening and closing of the cleaning pool to adjust the amount of cleaning liquid in the cleaning pool;

the centrifugal pump consists of an impeller and a pump shaft which rotate at a high speed, a centrifugal pump valve is arranged at a suction inlet of the centrifugal pump and is connected with a cleaning pool provided with a regulating valve, and a discharge outlet of the centrifugal pump is connected with a waste liquid pool. The computer controls the centrifugal pump to start and then drives the impeller to rotate at a high speed, the solution in the pump moves radially from inside to outside, the ink mixed liquid in the cleaning pool obtains energy, the flow rate is increased, the ink remained in the nozzle is sucked into the cleaning pool and cleans the nozzle, and the ink is discharged into the buffer detection area and the waste liquid pool through the center of the impeller;

the laser generator is arranged at the upper end of the buffer detection area, laser generated by the laser generator irradiates ink mixed liquid in the detection area without dead angles, and when ink 8 exists in the ink mixed liquid, the laser attenuates in the transmission process due to the reflection, refraction and absorption of the ink to the laser;

the optical receiver is arranged at the lower end of the buffer detection area, receives and records attenuated laser, converts an optical signal into an electrical signal through photoelectric conversion, and feeds back the electrical signal to a computer through A/D conversion for data processing and analysis, so that a curve of voltage amplitude and time is obtained, and when the error between the voltage amplitude and a set threshold corresponding to various cleaning liquids is beyond +/-10%, the computer automatically controls the opening of a valve and the starting of a centrifugal pump to clean a spray head in a cleaning pool and discharge ink mixed liquid;

the shell of the buffer detection area is transparent and is connected with the centrifugal pump, so that the buffer detection area has a buffer effect on high-speed waste liquid, the mechanical loss of mixed liquid to the impeller is reduced, and the liquid in the area is also used for detecting and feeding back information to the computer;

the waste liquid pool is connected with the discharge port of the centrifugal pump, the ink waste liquid is stored in the waste liquid pool for a short time, the waste liquid pool and the centrifugal pump cannot be polluted, and after the automatic cleaning device stops running, the waste liquid pool is disassembled and the ink waste liquid is discharged.

The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.