WO2019127688A1

WO2019127688A1 - High-viscosity liquid supply and discharge device

Info

Publication number: WO2019127688A1
Application number: PCT/CN2018/072860
Authority: WO
Inventors: 孙超
Original assignee: 武汉华星光电半导体显示技术有限公司
Priority date: 2017-12-26
Filing date: 2018-01-16
Publication date: 2019-07-04
Also published as: CN107999334B; CN107999334A

Abstract

Disclosed is a high-viscosity liquid supply and discharge device (10), comprising a nozzle (1), liquid supply pipes (21, 22) and a bubble discharge pipe (3), wherein the bottom of the nozzle (1) is provided with a liquid outlet end (11), the liquid supply pipes (21, 22) are respectively connected to opposite side walls of the nozzle (1) near the liquid outlet end (11), and each of the liquid supply pipes (21, 22) has one end thereof extending into a cavity of the nozzle (1); the liquid supply pipes (21, 22) are further provided with bubble sensors (23, 24); the bubble discharge pipe (3) is arranged at the top of the nozzle (1), and the bubble discharge pipe (3) is provided with bubble discharge valves (310, 320, 330); and the bubble discharge valves (310, 320, 330) are configured to be opened to discharge bubbles when the bubble sensors (23, 24) detect that bubbles exist in the liquid supply pipes (21, 22) and/or the nozzle (1). In the supply and discharge device (10), a high-viscosity liquid flows into the nozzle (1) from the liquid supply pipes (21, 22) at the two sides of the nozzle (1), and by means of the bubble sensors (23, 24) on the liquid supply pipes (21, 22) and the bubble discharge pipe (3) connected to the nozzle (1), the high-viscosity liquid without bubbles can be discharged via the liquid outlet end (11) at the bottom of the nozzle (1).

Description

High viscosity liquid supply and discharge device

The present application claims priority to Chinese Patent Application No. 201711442725.6, entitled "A High Viscosity Liquid Supply and Discharge Device" on December 26, 2017, the contents of which are incorporated herein by reference. The way is incorporated into this text.

Technical field

The invention relates to the field of flat panel display technology, in particular to a high viscosity liquid supply and discharge device.

Background technique

In the field of flat panel display, for example, in the fabrication of flexible substrates in flexible organic electroluminescent devices, and in the fabrication of liquid crystal alignment films or sealants in liquid crystal displays, coating of highly viscous materials (such as polyimide) is generally used. PI). Usually, the liquid of the high-viscosity material is sent to the slit nozzle (Slit Nozzle) after the defoaming, and then sprayed and coated. Generally, the liquid supply line is disposed above the slit nozzle. When a high-viscosity material is injected from above the nozzle, a part of the air bubbles will be generated in the pipeline, and some of the bubbles will not be discharged in the high-viscosity liquid material remaining in the nozzle, and then solidified after coating the high-viscosity material, and the bubble residue may be affected. The quality of the coating, which in turn causes defects in the display device.

Summary of the invention

In view of the above, the present invention provides a high-viscosity liquid supply and discharge device for solving the problem that the high-viscosity liquid after defoaming in the prior art is easy to generate bubbles in the liquid supply line and the nozzle, and the high-viscosity liquid material is lowered. The number of bubbles after curing increases the coating quality.

Specifically, the present invention provides a high viscosity liquid supply and discharge device comprising a nozzle, a liquid supply pipe, a discharge pipe, the liquid supply pipe being supplied with a high viscosity liquid; the nozzle having a cavity a bottom of the nozzle is provided with a liquid discharge end, and a liquid supply pipe is respectively connected to opposite side walls of the nozzle near the liquid discharge end, and one end of the liquid supply pipe extends into the nozzle a bubble sensor is disposed on the liquid supply pipe; the bubble discharge pipe is disposed at a top of the nozzle, and the exhaust pipe is disposed on the discharge pipe; the exhaust valve is used in the The bubble sensor detects opening of the liquid supply tube and/or the presence of air bubbles in the nozzle to discharge the air bubbles.

Wherein, the liquid supply pipe is further provided with a flow regulating valve for adjusting the flow rate of the high viscosity liquid in the liquid supply pipe.

Wherein, the exhaust valve and the bubble sensor are electrically connected to the control module; when the bubble sensor detects the presence of a bubble, the control module controls the exhaust valve to open to perform air bubbles.

Wherein, the number of the bubble discharging tubes is two or more.

Wherein, the height of the liquid supply pipe from the junction of the nozzle and the liquid discharge end is 100-200 mm.

Wherein, the size of the liquid discharge end gradually decreases along the vertical direction from the top to the bottom of the nozzle.

Further, the minimum size of the liquid discharge end is 0.1-0.2 mm.

Wherein, the inner diameter of the liquid supply pipe is 10-20 mm.

Wherein, the inner diameter of the bubble discharging tube is 5-8 mm.

Wherein the supply and discharge device further comprises a liquid reservoir, and the high viscosity liquid material in the liquid storage device is supplied into the liquid supply pipe.

The high viscosity liquid supply and discharge device provided by the invention comprises a nozzle, a liquid supply pipe and a discharge pipe, wherein the bottom of the nozzle is provided with a liquid discharge end, and is provided at two side walls of the nozzle near the liquid discharge end. Two liquid supply pipes communicating with the cavity of the nozzle, the high viscosity liquid flowing into the nozzle from the liquid supply pipe on both sides of the nozzle, so that less bubbles are generated as the liquid flows. At the same time, a bubble sensor is further disposed on the liquid supply pipe; the top of the nozzle is provided with the bubble discharge pipe, and the discharge pipe is provided with an exhaust valve; even when the bubble sensor detects the liquid supply pipe And/or when there is a bubble in the nozzle, the exhaust valve on the bubble discharge tube is opened, the bubble floats and is discharged from the bubble discharge tube above the nozzle, and the bubble is not carried into the high viscosity liquid flowing from both sides of the nozzle. In this way, the high-viscosity liquid with no bubble inclusions is discharged from the liquid discharge end of the bottom of the nozzle, and then after coating and curing, a smooth and smooth film layer can be formed, and the coating quality of the high-viscosity liquid material is improved.

DRAWINGS

1 is a schematic view showing the structure of a high viscosity liquid supply and discharge device according to an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described in the following with reference to the accompanying drawings. It is apparent that the described embodiments are part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of the present invention.

As shown in FIG. 1 , an embodiment of the present invention provides a high-viscosity liquid supply and discharge device 10 , which includes a nozzle 1 , a liquid supply pipe, and a bubble discharge pipe 3 . The nozzle 1 has a cavity, and the bottom of the nozzle 1 is provided with a liquid discharge end 11 . Two liquid supply pipes 21 are connected to opposite side walls of the nozzle 1 near the liquid discharge end 11 . And 22 (which may be referred to as a first liquid supply pipe 21 and a second liquid supply pipe 22, respectively), and one end of the two liquid supply pipes extends into the cavity of the nozzle 1 to communicate with the cavity of the nozzle 1. . That is, the first liquid supply tube 21 and the second liquid supply tube 22 pass through the opposite side walls of the nozzle 1 and extend into the cavity of the nozzle 1 to communicate with the cavity of the nozzle 1 and first The liquid supply pipe 21 and the second liquid supply pipe 22 are adjacent to the liquid discharge end. The two supply pipes are supplied with a high-viscosity liquid such that the high-viscosity liquid flows into the cavity of the nozzle 1 from the liquid supply pipe on both sides of the nozzle 1, and is discharged through the liquid discharge end 11 at the bottom of the nozzle 1.

The first liquid supply tube 21 and the second liquid supply tube 22 are also respectively provided with bubble sensors 23 and 24 (which may be referred to as a first bubble sensor 23 and a second bubble sensor 24, respectively), and the bubble sensor is used for bubbles in the pipeline. The detection is, for example, a bubble in two liquid supply tubes, and a bubble in the nozzle 1 communicating with the liquid supply tube.

The top of the nozzle 1 is provided with the discharge tube 3, and the discharge tube 3 is provided with an exhaust valve. The exhaust valve on the bubble discharging tube 3 is used to open the exhaust valve on the bubble discharging tube 3 to discharge the air bubbles when the bubble sensor on the liquid supply tube detects the presence of air bubbles.

It can be understood that in other embodiments of the present invention, the number of the bubble discharging tubes 3 may be one, two or three or more. In Fig. 1, the number of the discharge tubes 3 is three, which may be referred to as a first discharge tube 31, a second discharge tube 32, and a third discharge tube 33, respectively, and each of the discharge tubes is provided with a corresponding one. Vent. That is, the first exhaust pipe 31 is provided with a first exhaust valve 310, a second exhaust valve 320, and a third exhaust valve 330.

When at least one of the first bubble sensor 23 on the first liquid supply pipe 21 and the bubble sensor 24 on the second liquid supply pipe 22 detects the presence of a bubble in the above-mentioned pipe, the first exhaust gas can be opened. At least one of the valve 310, the second exhaust valve 320, and the third exhaust valve 330 performs bubble discharge. Preferably, the exhaust valves on all of the bubble discharge tubes 3 are simultaneously opened, so that the time required for the bubbles to be discharged is shorter, and the concept that the bubbles are wrapped into the high viscosity liquid is smaller.

Alternatively, the exhaust valve on the bubble discharging tube 3 may be a manual valve or an automatic valve (for example, a solenoid valve). Preferably, the first exhaust valve 310, the second exhaust valve 320, and the third exhaust valve 330 are both solenoid valves. This makes it easy to discharge the bubble tube 3 when there is a bubble generation, and there is almost no time delay.

In the embodiment of the present invention, the first bubble sensor 23 on the first liquid supply pipe 21, the second bubble sensor 24 on the second liquid supply pipe 22, and all the exhaust valves on the bubble discharge pipe 3 are all controlled. Modules (not shown) are electrically connected. When any one of the bubble sensors described above detects the presence of a bubble, the control module controls the exhaust valve on the drain pipe 3 to open and perform bubble discharge.

It can be understood that the control module can be a control circuit board, and a central processing unit, a data memory, a demodulator or a converter function device is disposed on the control circuit board.

In the present invention, the first liquid supply pipe 21 and the second liquid supply pipe 22 are closer to the bottom of the nozzle 1, so that when the high-viscosity liquid flows in from both sides of the nozzle 1, the airflow generated by the liquid flow is less disturbed, and the air bubbles are Very few. In Fig. 1, the height h of the first liquid supply tube 21 or the second liquid supply tube 22 from the bottom of the nozzle 1 is 15 mm (i.e., the height h from the junction of the nozzle 1 and the liquid outlet end 11).

In other embodiments of the invention, the nozzle 1 is integrally formed with the liquid outlet end 11. At this time, the junction of the nozzle and the liquid discharge end 11 can be understood as the starting point at which the size of the liquid discharge end 11 starts to decrease. Optionally, the height of the first liquid supply tube 21 or the second liquid supply tube 22 from the top of the nozzle 1 is 100-200 mm. That is, the distance between the nozzle and the discharge tube 3 is from the first liquid supply tube 21 or the second liquid supply tube 22 by a distance of 100 to 200 mm. For example, 120-180mm.

Optionally, the first liquid supply tube 21 and the second liquid supply tube 22 are disposed in parallel and on the same horizontal line.

Optionally, the first liquid supply pipe 21 is provided with a first flow regulating valve 25, and the second liquid supply pipe 22 is provided with a second flow regulating valve 25, wherein the two flow regulating valves are used for adjusting corresponding The flow rate of the highly viscous liquid in the supply pipe. Further, the two flow regulating valves are electrically connected to the control module.

Alternatively, the size of the liquid discharge end 11 is gradually reduced along the vertical direction from the top to the bottom of the nozzle 1 (i.e., from the top to the bottom). In this embodiment, the liquid discharge end 11 (also referred to as a coating end) is a slit type, and the outlet width of the liquid discharge end 11 can be adjusted according to the thickness of the high viscosity material to be applied. Optionally, the outlet end 11 has an outlet width of 0.1-0.2 mm. That is, the minimum size of the liquid discharge end 11 is 0.1 to 0.2 mm from the top to the bottom.

Optionally, the inner diameter of the first liquid supply tube 21 or the second liquid supply tube 22 ranges from 10 to 20 mm. The inner diameter of the bubble discharging tube 3 ranges from 5 to 8 mm.

The supply and discharge device 10 further includes a reservoir 4 into which the high viscosity liquid material stored in the accumulator 4 is supplied. Further, a transfer pump 5 is further provided at the outlet of the accumulator 4, and the high-viscosity liquid material in the accumulator 4 is supplied to the above-described liquid supply pipe via the transfer pump 5.

In the high viscosity liquid supply and discharge device 10 provided by the embodiment of the present invention, at the liquid discharge end 11 near the bottom of the nozzle 1, the two side walls of the nozzle 1 are provided with a liquid supply pipe communicating with the cavity of the nozzle 1, a high viscosity liquid. The liquid supply pipe from both sides of the nozzle 1 flows into the nozzle 1, so that bubbles are generated as the liquid flows. At the same time, a bubble sensor is further disposed on the liquid supply pipe; the top of the nozzle is provided with the bubble discharge pipe 3, and the discharge pipe 3 is provided with an exhaust valve; even when the bubble sensor detects the supply When there is a bubble in the liquid pipe and/or the nozzle, the exhaust valve on the bubble discharging pipe 3 is opened, the bubble floats up and is discharged from the bubble discharging pipe 3 above the nozzle 1, and the air bubbles are not carried into the both sides of the nozzle. In the high-viscosity liquid flowing in, the high-viscosity liquid with no bubble inclusions is discharged from the liquid discharge end 11 at the bottom of the nozzle 1, and then, after coating and solidification, a smooth and smooth film layer can be formed, and the high-viscosity liquid is improved. The coating quality of the material.

The above is a preferred embodiment of the present invention, but it is not to be construed as limiting the scope of the invention. It should be noted that a number of modifications and refinements may be made by those skilled in the art without departing from the principles of the invention, and such modifications and refinements are also considered to be within the scope of the invention.

Claims

A high-viscosity liquid supply and discharge device, wherein the supply and discharge device comprises a nozzle, a liquid supply pipe, a discharge pipe, the liquid supply pipe is supplied with a high-viscosity liquid; the nozzle has a cavity, and the nozzle has a bottom end is provided with a liquid discharge end, and a liquid supply pipe is respectively connected to opposite side walls of the nozzle near the liquid discharge end, and one end of the liquid supply pipe extends into a cavity of the nozzle; a bubble sensor is further disposed on the liquid supply pipe; the discharge pipe is disposed at a top of the nozzle, and the exhaust pipe is provided with an exhaust valve; the exhaust valve is used to detect the bubble sensor The liquid supply tube and/or the presence of air bubbles in the nozzle open to discharge air bubbles.
The supply and discharge device according to claim 1, wherein said liquid supply pipe is further provided with a flow regulating valve for regulating a flow rate of the high viscosity liquid in said liquid supply pipe.
The supply and discharge device according to claim 2, wherein said liquid supply pipe is symmetrically coupled to opposite side walls of said nozzle.
The supply and discharge device according to claim 1, wherein said exhaust valve and said bubble sensor are electrically connected to a control module; said control module controls said exhaust gas when said bubble sensor detects the presence of a bubble The valve opens to bubble out.
The supply and discharge device according to claim 1, wherein the number of the discharge tubes is two or more, and each of the discharge tubes is provided with a corresponding exhaust valve.
The supply and discharge device according to claim 1, wherein a height of the liquid supply pipe from the junction of the nozzle and the liquid discharge end is 15 to 30 mm.
The supply and discharge device according to claim 1, wherein a distance between the nozzle and the discharge tube is from 100 to 200 mm from the liquid supply tube.
The supply and discharge device according to claim 1, wherein the size of the liquid discharge end is gradually reduced in a vertical direction from the top to the bottom of the nozzle.
The supply and discharge device according to claim 8, wherein said liquid discharge end has a minimum size of 0.1 to 0.2 mm.
The supply and discharge device according to claim 5, wherein the number of the discharge tubes is three.
The supply and discharge device according to claim 1, wherein the exhaust valve is a solenoid valve.
The supply and discharge device according to claim 1, wherein the liquid supply tube has an inner diameter of 10 to 20 mm.
The supply and discharge device according to claim 1, wherein the discharge tube has an inner diameter of 5 to 8 mm.
The supply and discharge device according to claim 1, wherein said supply and discharge device further comprises an accumulator, and a high-viscosity liquid material in said accumulator is supplied into said liquid supply pipe.
The supply and discharge device according to claim 1, wherein the control module is a control circuit main board, and a central processing unit, a data memory, a demodulator or a converter function device is disposed on the main circuit of the control circuit.