CN105584225B - Liquid supply system for inkjet printing equipment and inkjet printing equipment - Google Patents

Abstract

The invention discloses a liquid supply system of an ink-jet printing device and the ink-jet printing device. The liquid supply system of the inkjet printing equipment includes an ink refrigeration device, an ink adjustment device, a nozzle and a temperature adjustment device, wherein: the ink refrigeration device, the ink adjustment device and the nozzle are connected in sequence through pipelines; the ink adjustment device is used for degassing the ink And adjust the volume of ink droplets; the temperature adjustment device is used to adjust the temperature of the ink ejected from the nozzle. Compared with the prior art, the solution can guarantee the temperature parameters of the ink during the inkjet printing process and improve the quality of the display product.

Description

Liquid supply system for inkjet printing equipment and inkjet printing equipment

technical field

The invention relates to the technical field of inkjet printing, in particular to a liquid supply system of an inkjet printing equipment and the inkjet printing equipment.

Background technique

The organic light-emitting diode (Organic Light-Emitting Diode, OLED) display product is produced by inkjet printing equipment, which has the advantages of high material utilization rate and short production cycle. When printing, in order to ensure the quality of the display product, it is necessary to consider the possible impact of the relevant properties of the ink on the printing effect. Some inks need to be stored at low temperature and used at room temperature to ensure a good printing effect. Since the temperature of the ink will directly affect the surface tension and other characteristics of the ink, it is necessary to strictly control the temperature parameters in the entire production process during the printing process.

At present, the ink of an inkjet printing device is usually stored at a low temperature, and the temperature is raised by heat exchange with the surrounding environment under normal temperature conditions. This method can be realized in the laboratory stage, but in the process of mass production of display products, due to the unsteady nature of the ink, there will be batch differences, which will affect the quality of display products.

Contents of the invention

Embodiments of the present invention provide a liquid supply system of an inkjet printing device and the inkjet printing device, so as to ensure the temperature parameters of the ink during the inkjet printing process and improve the quality of display products.

The embodiment of the present invention discloses a liquid supply system for inkjet printing equipment, which includes an ink refrigeration device, an ink adjustment device, a nozzle and a temperature adjustment device, wherein: the ink refrigeration device, the ink adjustment device and the nozzle are connected in sequence through pipelines ; The ink adjustment device is used to degas the ink and adjust the volume of ink droplets; the temperature adjustment device is used to adjust the temperature of the ink ejected from the nozzle.

In the technical solution of the embodiment of the present invention, the liquid supply system of the inkjet printing device can meet the requirement of ink storage in a low-temperature environment, and can keep the temperature of the ink ejected from the nozzle constant, thereby ensuring the stability of the ink properties. Compared with the prior art, the technical solution can guarantee the temperature parameters of the ink during the inkjet printing process and improve the quality of the display product.

Preferably, the liquid supply system of the inkjet printing device further includes an ink temporary storage device arranged on the pipeline between the ink refrigeration device and the ink adjustment device. After the ink flows from the ink refrigeration device into the ink temporary storage device, the low-temperature ink conducts heat exchange with the surrounding environment to initially heat up. Foam treatment to improve print quality.

Preferably, the liquid supply system of the inkjet printing device further includes a first valve arranged on the pipeline between the ink refrigeration device and the ink temporary storage device; and/or, arranged between the ink temporary storage device and the ink adjustment device Second valve on line. The ink volume in the ink temporary storage device can be controlled by setting the first valve, and the ink volume in the ink regulating device can be controlled by setting the second valve, so as to ensure smooth flow of ink.

Further, the liquid supply system of the inkjet printing device further includes a first liquid level detection device disposed in the tank of the ink temporary storage device; and/or a second liquid level detection device disposed in the tank of the ink adjustment device . By setting the liquid level detection device, the liquid level position of the ink can be detected in real time, so as to replenish the ink in the ink temporary storage device and the ink adjustment device, so that the amount of ink in the ink temporary storage device and the ink adjustment device can meet the working needs.

Preferably, the top of the tank of the ink regulating device has an air suction hole. The air in the box of the ink regulating device can be sucked out through the air hole, so that the box of the ink regulating device can be kept in a state of slight vacuum.

Preferably, the ink refrigeration device is a semiconductor refrigerator. The refrigerated temperature of the semiconductor refrigerator meets the needs of ink storage. At the same time, because of its small size and light weight, there is no disturbance of air flow during operation, so the overall performance of inkjet printing equipment can be improved.

Preferably, the temperature regulating device heats the ink in the liquid inlet pipeline of the nozzle and the ink in the spray cavity of the nozzle. In this way, the temperature regulating device can heat a larger volume of ink, so that the temperature of the ink ejected from the nozzle can be kept constant.

Preferably, the temperature adjustment device is an infrared wave temperature adjustment device. The infrared wave temperature adjustment device can quickly heat up the ink through thermal radiation, so that the temperature of the ink ejected from the nozzle remains constant, further ensuring the temperature parameters of the ink during the inkjet printing process, and improving the quality of the display product.

Optionally, the temperature adjustment device is an electric water tank temperature adjustment device. Using the temperature adjustment device of the electric water tank, the heat can be evenly transferred to the ink through the hot water, so that the temperature of the ink ejected from the nozzle can be kept constant, which further ensures the temperature parameters of the ink during the inkjet printing process and improves the quality of the display product.

Preferably, the liquid supply system of the inkjet printing device further includes a liquid outlet pipeline communicated with the spray chamber of the spray head. The waste ink in the liquid supply system of the printing equipment can be replaced by using the liquid outlet pipeline, and at the same time, the air bubbles in the liquid supply system of the printing equipment can be discharged to ensure the stability of the ink properties and improve the printing quality.

An embodiment of the present invention also provides an inkjet printing device, including the liquid supply system of the inkjet printing device described in any one of the foregoing technical solutions. The inkjet printing device can guarantee the temperature parameters of the ink during the inkjet printing process, and improve the quality of display products.

Description of drawings

1 is a schematic structural view of a liquid supply system of an inkjet printing device according to an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of a liquid supply system of an inkjet printing device according to another embodiment of the present invention.

Reference signs:

10-Ink refrigeration device 20-Ink adjustment device 30-Nozzle

40-temperature regulating device 50-ink temporary storage device 51-first valve

21-Second valve 52-First liquid level detection device 22-Second liquid level detection device

60-inlet pipe 70-outlet pipe

detailed description

In order to ensure the temperature parameters of the ink during the inkjet printing process and improve the quality of the displayed product, the embodiment of the present invention provides a liquid supply system for the inkjet printing equipment and the inkjet printing equipment. In order to make the purpose, technical solution and advantages of the present invention clearer, the following examples are given to further describe the present invention in detail.

The liquid supply system of the inkjet printing equipment provided by the embodiments of the present invention and the specific application range of the inkjet printing equipment are not limited, for example, it can be used to make OLED display products, quantum dot light-emitting diode (Quantum Dot Light-EmittingDiode, QLED) display products Wait.

As shown in Figure 1, the liquid supply system of the inkjet printing equipment provided by an embodiment of the present invention includes an ink refrigeration device 10, an ink adjustment device 20, a nozzle 30 and a temperature adjustment device 40, wherein: the ink refrigeration device 10, the ink adjustment device The device 20 and the nozzle 30 are sequentially connected through pipelines; the ink adjustment device 20 is used to degas the ink and adjust the volume of ink droplets; the temperature adjustment device 40 is used to adjust the temperature of the ink ejected from the nozzle 30 .

In the technical solution of the embodiment of the present invention, the ink refrigeration device 10 can meet the needs of ink storage in a low-temperature environment, the ink adjustment device 20 can degas the ink and adjust the volume of ink droplets, and the temperature adjustment device 40 can make the nozzle 30 spray The temperature of the outgoing ink is kept constant, thus ensuring the stability of the ink properties. Compared with the prior art, the technical solution can guarantee the temperature parameters of the ink during the inkjet printing process and improve the quality of the display product.

As shown in FIG. 2 , in a preferred embodiment of the present invention, the liquid supply system of the inkjet printing device further includes an ink temporary storage device 50 disposed on the pipeline between the ink refrigeration device 10 and the ink adjustment device 20 . After the ink flows into the ink temporary storage device 50 from the ink refrigeration device 10, the low-temperature ink conducts heat exchange with the surrounding environment to initially heat up. Perform defoaming treatment to improve printing quality.

In a preferred embodiment of the present invention, the liquid supply system of the inkjet printing equipment also includes a first valve 51 arranged on the pipeline between the ink refrigeration device 10 and the ink temporary storage device 50; The second valve 21 on the pipeline between the device 50 and the ink regulating device 20. The amount of ink in the ink temporary storage device can be controlled by setting the first valve 51, and the ink amount in the ink regulating device can be controlled by setting the second valve 21, so that between the ink refrigeration device 10 and the ink temporary storage device 50, the ink temporary The pressure difference between the storage device 50 and the ink regulating device 20 is kept constant to avoid clogging of the nozzle and to regulate the volume of ink droplets to ensure smooth flow of ink.

It is worth mentioning that the specific types of the first valve and the second valve are not limited, for example, they may be gate valves, stop valves, or solenoid valves.

Further, the liquid supply system of the inkjet printing equipment also includes a first liquid level detection device 52 disposed in the tank of the ink temporary storage device 50; and/or, a second liquid level detection device disposed in the tank of the ink adjustment device 20 device 22. By setting the liquid level detection device, the liquid level position of the ink can be detected in real time, so as to replenish the ink in the ink temporary storage device 50 and the ink adjustment device 20, and ensure that the amount of ink in the ink temporary storage device 50 and the ink adjustment device 20 meets the requirements. Work required.

In a preferred embodiment of the present invention, the top of the tank of the ink regulating device 20 has an air suction hole. The air in the box of the ink regulating device 20 can be sucked out through the air hole, so that the box of the ink regulating device 20 can maintain a slight vacuum state. According to the principle of vacuum defoaming, the pressure decreases, and the solubility of gas in the liquid also decreases accordingly, so that the free gas and dissolved gas in the liquid are released, so as to achieve the purpose of defoaming.

In a preferred embodiment of the present invention, the ink refrigeration device 10 is a semiconductor refrigerator. The refrigerated temperature of the semiconductor refrigerator meets the needs of ink storage. At the same time, because of its small size and light weight, there is no disturbance of air flow during operation, so the overall performance of inkjet printing equipment can be improved.

As shown in FIGS. 1 and 2 , in a preferred embodiment of the present invention, the temperature regulating device 40 heats the ink in the liquid inlet pipeline 60 of the nozzle 30 and the ink in the spray cavity of the nozzle 30 . In this way, the temperature regulating device can heat a larger volume of ink, so that the temperature of the ink ejected from the nozzle 30 can be kept constant.

The specific type of the temperature adjustment device 40 is not limited, and in an embodiment of the present invention, the temperature adjustment device 40 is preferably an infrared wave temperature adjustment device. The infrared wave temperature adjustment device irradiates the infrared rays on the liquid inlet pipeline 60 and the spray chamber of the nozzle 30, so that the ink in the liquid inlet pipeline 60 and the ink in the nozzle chamber of the nozzle 30 can be heated rapidly, so that the nozzle 30 can eject The temperature of the ink is kept constant, which further guarantees the temperature parameters of the ink during the inkjet printing process and improves the quality of the display product.

In another embodiment of the present invention, the temperature regulating device 40 is a temperature regulating device for an electric water tank. An electric heating rod is arranged in the water tank of the electric hot water tank temperature regulating device, and the electric heating rod can heat the water in the water tank to a set temperature. The water in the electric heating water tank passes through the coating liquid inlet pipeline 60 and the spray chamber of the nozzle 30, and transfers heat evenly to the ink in the liquid inlet pipeline 60 and the ink in the nozzle cavity of the nozzle 30, so that the nozzle 30 sprays The temperature of the printed ink is kept constant, which further ensures the temperature parameters of the ink during the inkjet printing process and improves the quality of the display product.

In a preferred embodiment of the present invention, the liquid supply system of the inkjet printing device further includes a liquid outlet pipeline 70 communicating with the spray chamber of the spray head 30 . The waste ink in the liquid supply system of the printing device can be replaced by using the liquid outlet pipeline 70, and the air bubbles in the liquid supply system of the printing device can also be discharged to ensure the stability of the ink properties and improve the printing quality.

To sum up, by adopting the technical solution of the embodiment of the present invention, the temperature parameter of the ink during the inkjet printing process can be guaranteed, and the quality of the display product can be improved.

An embodiment of the present invention also provides an inkjet printing device, including the liquid supply system of the inkjet printing device of any one of the foregoing technical solutions. The inkjet printing device can guarantee the temperature parameters of the ink during the inkjet printing process, and improve the quality of display products.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and equivalent technologies thereof, the present invention also intends to include these modifications and variations.

Claims (9)

1. a kind of liquid-supplying system of ink jet printing device, it is characterised in that including ink cold storage plant, ink adjusting device, spray Head and temperature-adjusting device, and it is arranged at the temporary dress of ink between ink cold storage plant and ink adjusting device on pipeline Put, wherein：The ink cold storage plant, ink adjusting device and shower nozzle are linked in sequence by pipeline；The ink adjusting device For carrying out deaeration and regulation droplet volume to ink；The temperature-adjusting device is used for the temperature that adjusting shower nozzle sprays ink.

2. the liquid-supplying system of ink jet printing device as claimed in claim 1, it is characterised in that also include：It is arranged at ink cold Hide the first valve on pipeline between device and ink apparatus for temporary storage；And/or, it is arranged at ink apparatus for temporary storage and ink regulation dress The second valve between putting on pipeline.

3. the liquid-supplying system of ink jet printing device as claimed in claim 1, it is characterised in that also include：

It is arranged at the first liquid level detection device in the casing of ink apparatus for temporary storage；And/or, it is arranged at the case of ink adjusting device The second internal liquid level detection device.

4. the liquid-supplying system of ink jet printing device as claimed in claim 1, it is characterised in that the case of the ink adjusting device There is aspirating hole at the top of body.

5. the liquid-supplying system of ink jet printing device as claimed in claim 1, it is characterised in that the ink cold storage plant is half Conductor refrigerator.

6. the liquid-supplying system of ink jet printing device as claimed in claim 1, it is characterised in that the temperature-adjusting device is to spray Ink in head water influent pipeline and the ink in the spray chamber of shower nozzle are heated.

7. the liquid-supplying system of ink jet printing device as claimed in claim 1, it is characterised in that the temperature-adjusting device is red External wave temperature-adjusting device；Or, the temperature-adjusting device is electric heat water tank temperature-adjusting device.

8. the liquid-supplying system of the ink jet printing device as described in any one of claim 1~7, it is characterised in that also including with spray The drain pipe road of the spray chamber connection of head.

9. a kind of ink jet printing device, it is characterised in that including the ink jet printing device as described in any one of claim 1~8 Liquid-supplying system.