Liquid supply system of liquid crystal coating device

Abstract

The utility model relates to a liquid supply system of a liquid crystal coating device, which is used for supplying liquid to the liquid crystal coating device and comprises a liquid supply mother bottle and a liquid supply electromagnetic valve, an inlet of the liquid supply electromagnetic valve is respectively connected with a nitrogen end and a vacuum end and can be switched, and an outlet of the liquid supply electromagnetic valve is connected with a gas inlet pipe of the liquid supply mother bottle; a liquid outlet of the liquid supply mother bottle is respectively connected with a plurality of dripping units; the liquid crystal liquid supplementing system is arranged in the bearing table and comprises a plurality of liquid crystal liquid supplementing bottles and at least one cleaning liquid supply bottle, liquid outlets of each liquid crystal liquid supplementing bottle and each cleaning liquid supply bottle are each independently connected with a liquid supplementing electromagnetic valve, and outlets of all the liquid supplementing electromagnetic valves are connected with a liquid inlet pipe of the liquid supply mother bottle. According to the utility model, the liquid supply mother bottle is arranged in the machine table portal frame and is connected into the vacuum end to realize bubble removal; meanwhile, a plurality of liquid crystal liquid supplementing bottles and cleaning liquid supplying bottles are arranged inside, so that materials can be replaced without shutdown, and the utilization rate of the equipment is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of liquid crystal panel production, and particularly relates to a liquid supply system for a liquid crystal coating device. Background Art

[0002] In the production process of liquid crystal panels, a liquid crystal coater is the main machine for realizing the liquid crystal coating process. There are mainly two types of existing liquid supply systems for liquid crystal coaters. In the first liquid supply system, liquid is mainly supplied through a liquid crystal bottle. The liquid crystal bottle is fixed on a gantry and reciprocates with the gantry during the process actions. This causes the liquid crystal in the liquid crystal bottle to generate bubbles due to shaking during movement. Moreover, the less liquid crystal remaining in the liquid crystal bottle, the more obvious the shaking and the more bubbles. Excessive bubbles are likely to cause quality abnormalities in liquid crystal panels during production. In the second liquid supply system, the mother bottle is placed outside the machine, and central liquid supply is achieved through an external pipeline. The too-long connecting pipeline between the mother bottle and the liquid crystal bottle will also cause bubble accumulation; bubbles are also generated when the liquid is injected into the liquid crystal bottle, reducing the yield rate and increasing the production cost. In addition, both of the above two liquid supply systems require shutting down the machine to replace the materials in the mother bottle or the liquid crystal bottle, resulting in production capacity loss and reducing the operation rate. Summary of the Utility Model

[0003] In order to solve the above problems existing in the prior art, the utility model provides a liquid supply system for a liquid crystal coating device. The technical problems to be solved by the utility model are realized through the following technical solutions:

[0004] The utility model provides a liquid supply system for a liquid crystal coating device for supplying liquid to the liquid crystal coating device. The liquid crystal coating device includes: a machine gantry, a plurality of dropping units, and a carrier table, including: a machine liquid supply system, which is arranged inside the machine gantry and moves with the machine gantry, and includes: a liquid supply mother bottle and a liquid supply solenoid valve. The inlet of the liquid supply solenoid valve is respectively connected to a nitrogen end and a vacuum end and can be switched between the nitrogen end and the vacuum end. The outlet of the liquid supply solenoid valve is connected to the inlet pipe of the liquid supply mother bottle; the liquid outlet of the liquid supply mother bottle is respectively connected to a plurality of dropping units; a liquid crystal replenishing system, which is arranged inside the carrier table, includes: a plurality of liquid crystal replenishing bottles and at least one cleaning liquid supply bottle. The liquid outlet of each liquid crystal replenishing bottle and each cleaning liquid supply bottle is individually connected to a replenishing solenoid valve, and the outlets of all replenishing solenoid valves are connected to the inlet pipe of the liquid supply mother bottle.

[0005] In an embodiment of the utility model, a cavity is arranged inside the liquid supply mother bottle, and the diameter of the cavity gradually decreases from top to bottom. The inlet pipe, the inlet liquid pipe, and the liquid outlet are respectively communicated with the cavity.

[0006] In an embodiment of the utility model, the bottom of the cavity can be arc-shaped or conical.

[0007] In an embodiment of the present utility model, the radian range of the bottom of the arc-shaped cavity is 60° to 150°.

[0008] In an embodiment of the present utility model, the radian range of the bottom of the conical cavity is 60° to 150°.

[0009] In an embodiment of the present utility model, the liquid outlet is connected to the center of the bottom of the cavity.

[0010] In an embodiment of the present utility model, when the liquid crystal coating device is in the automatic metering cycle, one of the liquid crystal replenishing bottles connected to the replenishing solenoid valve is opened to replenish the liquid supply master bottle; the inlet of the liquid supply solenoid valve is connected to the nitrogen end, and the liquid crystal in the liquid supply master bottle is respectively pressed into a plurality of dropping units.

[0011] In an embodiment of the present utility model, when the liquid crystal coating device is in the production cycle, all the replenishing solenoid valves connected to the liquid crystal replenishing bottles are closed; the inlet of the liquid supply solenoid valve is connected to the vacuum end to discharge the air bubbles in the liquid supply master bottle.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] For the liquid supply system of the liquid crystal coating device of the present utility model, the liquid supply master bottle is arranged in the machine table gantry. The liquid supply master bottle can be switched between being connected to the nitrogen end and the vacuum end through the liquid supply solenoid valve, and then connected to the vacuum end and using the shaking generated by the movement of the machine table gantry to achieve defoaming. At the same time, a plurality of liquid crystal replenishing bottles are also arranged in the liquid crystal coating device, and each liquid crystal replenishing bottle is separately controlled by a replenishing solenoid valve, reducing the bubbles generated by liquid supply, avoiding the abnormal quality of the liquid crystal panel caused by bubbles, improving the yield rate, and reducing the production cost. In addition, for different materials, the liquid supply master bottle and the pipeline are flushed by the cleaning liquid supply bottle, and the liquid crystal replenishing bottles are independently controlled and switched to save the time for replacing materials; when replacing the liquid crystal replenishing bottle, it can also be replaced separately, achieving non-stop replacement of materials and improving the operation rate of the equipment.

[0014] For the liquid supply system of the liquid crystal coating device of the present utility model, the liquid crystal bottle in the liquid crystal coating device is changed to a liquid supply master bottle with an inverted water droplet-shaped inner cavity, and the liquid supply master bottle is replenished and the dropping unit is supplied with liquid by using the gap during the automatic metering cycle of the liquid crystal coating device; then, by using the shaking during the production cycle of the liquid crystal coating device and combining with vacuum to achieve defoaming operation, the risk of affecting the production of the liquid crystal panel due to air bubbles is eliminated.

[0015] The above description is only an overview of the technical solution of the present utility model. In order to better understand the technical means of the present utility model, it can be implemented according to the content of the description. And in order to make the above and other purposes, features and advantages of the present utility model more obvious and understandable, the following specific preferred embodiments are given and described in detail in conjunction with the accompanying drawings. Brief Description of the Drawings

[0016] Figure 1 FIG. is a schematic structural diagram of a liquid supply system of a liquid crystal coating device provided by an embodiment of the present utility model;

[0017] Figure 2 FIG. is a schematic structural diagram of a liquid supply mother bottle provided by an embodiment of the present utility model;

[0018] Figure 3 FIG. is a schematic working principle diagram of a liquid supply system of a liquid crystal coating device provided by an embodiment of the present utility model;

[0019] Figure 4 FIG. is a schematic working principle diagram of a liquid crystal replenishing system provided by an embodiment of the present utility model.

[0020] Reference Signs: 1 - Machine platform liquid supply system; 11 - Liquid supply mother bottle; 111 - Cavity; 112 - Air inlet pipe; 113 - Liquid inlet pipe; 114 - Liquid outlet; 12 - Liquid supply solenoid valve; 2 - Liquid crystal replenishing system; 21 - Liquid crystal replenishing bottle; 22 - Cleaning liquid supply bottle; 23 - Replenishing solenoid valve; 10 - Machine platform gantry; 20 - Dropping unit; 201 - Relay container; 30 - Carrying platform. Detailed Description of the Embodiments

[0021] In order to further elaborate on the technical means and effects adopted by the present utility model to achieve the intended utility model purpose, the following provides a detailed description of a liquid supply system of a liquid crystal coating device according to the present utility model in conjunction with the accompanying drawings and specific embodiments.

[0022] The foregoing and other technical contents, features and effects of the present utility model will be clearly presented in the following detailed description in conjunction with the accompanying drawings. Through the description of the specific embodiments, a more in-depth and specific understanding of the technical means and effects adopted by the present utility model to achieve the intended purpose can be obtained. However, the accompanying drawings are only for reference and illustration, and are not used to limit the technical solution of the present utility model.

[0023] Embodiment 1

[0024] As Figure 1As shown in the figure, taking an existing liquid crystal coating device as an example, it includes: a machine table gantry 10, a plurality of dropping units 20, and a carrier table 30. The machine table gantry 10 is arranged on the carrier table 30 and can slide on the carrier table 30. A plurality of dropping units 20 are arranged at intervals within the machine table gantry 10. The plurality of dropping units 20 move with the machine table gantry 10 and drop liquid crystal to form a liquid crystal panel. It can be understood that the above is an implementation form of an existing liquid crystal coating device, and the structure thereof is not limited in this application. Further, this embodiment provides a liquid supply system for a liquid crystal coating device for supplying liquid to the liquid crystal coating device.

[0025] As Figure 1 and Figure 2 shown, the liquid supply system of the liquid crystal coating device in this embodiment includes: a machine table liquid supply system 1 and a liquid crystal replenishing system 2. Among them, the machine table liquid supply system 1 is arranged within the machine table gantry 10 and moves with the machine table gantry 10. It includes: a liquid supply mother bottle 11 and a liquid supply solenoid valve 12. The inlets of the liquid supply solenoid valve 12 are respectively connected to the nitrogen end and the vacuum end and can be switched between the nitrogen end and the vacuum end. The outlet of the liquid supply solenoid valve 12 is connected to the inlet pipe 112 of the liquid supply mother bottle 11.

[0026] The principle is that: as Figure 1 and Figure 3 shown, the machine table liquid supply system 1 can move with the machine table gantry 10. Before the production cycle, the liquid supply mother bottle 11 stores liquid intermittently for the relay containers 20 in a plurality of dropping units 20. At the same time, the liquid crystal replenishing system 2 is arranged within the liquid crystal coating device, and the liquid supply mother bottle 11 is replenished with liquid through the liquid crystal replenishing bottle 21, so that the liquid crystal storage amount in the liquid supply mother bottle 11 is in a stable state. Further, the liquid supply mother bottle 11 is switched between the nitrogen end and the vacuum end through the liquid supply solenoid valve 12. During the production cycle, when connected to the vacuum end and combined with the shaking caused by the movement of the machine table gantry 10, the bubbles in the liquid supply mother bottle 11 are discharged, so that the bubbles generated due to shaking in the liquid supply mother bottle 11 dissipate.

[0027] As Figure 1 and Figure 3 shown, in this embodiment, the liquid outlet 114 of the liquid supply mother bottle 11 is respectively connected to a plurality of dropping units 20; the liquid crystal replenishing system 2 is arranged within the carrier table 30 and includes: a plurality of liquid crystal replenishing bottles 21 and at least one cleaning liquid supply bottle 22. The liquid outlet of each liquid crystal replenishing bottle 21 and each cleaning liquid supply bottle 22 is separately connected to a replenishing solenoid valve 23, and the outlets of all replenishing solenoid valves 23 are connected to the liquid inlet pipe 113 of the liquid supply mother bottle 11.

[0028] Optionally, the plurality of liquid crystal replenishing bottles 21 can store the same or different liquid crystal materials.

[0029] Optionally, acetone can be stored in the cleaning liquid supply bottle 22 for flushing the supply mother bottle 11 and the pipeline when changing materials.

[0030] The principle is as follows: By arranging several liquid crystal replenishing bottles 21 in the carrier 30, their movement is not affected by the movement of the machine tool gantry 10, and the length of the liquid supply pipeline between the liquid crystal replenishing bottles 21 and the supply mother bottle 11 is also greatly shortened. Each of the several liquid crystal replenishing bottles 21 is controlled by a separate replenishing solenoid valve 23 and does not affect each other. When material replacement is required, the supply mother bottle 11 and the pipeline are flushed through the cleaning liquid supply bottle 22 to achieve material replacement without stopping the machine. In addition, when the liquid crystal material storage in one of the liquid crystal replenishing bottles 21 is insufficient, other liquid crystal replenishing bottles 21 can be switched for replenishment through the replenishing solenoid valve 23, realizing the separate replacement of the liquid crystal replenishing bottles 21, which is beneficial to improving the equipment utilization rate.

[0031] Such as Figure 2 As shown, a cavity 111 is provided inside the supply mother bottle 11, and the diameter of the cavity 111 decreases sequentially from top to bottom. The air inlet pipe 112, the liquid inlet pipe 113, and the liquid outlet 114 are respectively communicated with the cavity 111. Specifically, the bottom of the cavity 111 can be arc-shaped or conical, the liquid outlet 114 is connected to the center of the bottom of the cavity 111, and the liquid outlet 114 is then connected to several dropping units 20 through pipelines respectively. Exemplarily, the cavity 111 is formed in an inverted water droplet shape, which is beneficial to the smooth outflow of the liquid crystal material therein and reduces the liquid crystal material residue in the supply mother bottle 11.

[0032] Optionally, the range of the radian X of the bottom of the arc-shaped cavity 111 can be 60° to 150°.

[0033] Optionally, the range of the radian X of the bottom of the conical cavity 111 can be 60° to 150°.

[0034] Such as Figure 1 And Figure 3 As shown, when the liquid crystal coating device is in the automatic metering cycle, the replenishing solenoid valve 23 connected to one of the liquid crystal replenishing bottles 21 is opened to replenish the supply mother bottle 11; the inlet of the supply solenoid valve 12 is connected to the nitrogen end, and the liquid crystal in the supply mother bottle 11 is respectively pressed into several dropping units 20 through nitrogen (N2).

[0035] It can be understood that the liquid crystal coating device has the characteristic of automatic metering, that is, the amount of liquid crystal used in production is intermittently measured during production. When in the automatic metering cycle, the machine tool gantry 10 returns to the automatic metering position. Simply put, during the automatic metering cycle, there are non-production working intervals.

[0036] Specifically, by using the automatically measured gap, the liquid replenishment solenoid valve 23 connected to one liquid crystal replenishment bottle 21 is opened, and the liquid crystal material is pressed into the liquid supply master bottle 11 through nitrogen to achieve liquid replenishment. Additionally, the liquid supply solenoid valve 12 is opened, and the liquid crystal material is pressed into the relay container 201 in the dropping unit 20 through nitrogen to achieve liquid supply. It should be noted that when the liquid crystal material in the liquid supply master bottle 11 is insufficient, not only are bubbles likely to be generated, which even affects production, but also the machine needs to be stopped when replacing the liquid supply master bottle 11, resulting in a reduction in production efficiency. Therefore, by using the automatically measured gap, liquid replenishment can be achieved without stopping the machine, enabling mid-course liquid replenishment and improving the equipment utilization rate.

[0037] As Figure 1 and Figure 3 shown, when the liquid crystal coating device is in the production cycle, all the liquid replenishment solenoid valves 23 connected to the liquid crystal replenishment bottles 21 are closed; the inlet of the liquid supply solenoid valve 12 is connected to the vacuum end to discharge the bubbles in the liquid supply master bottle 11.

[0038] Specifically, during the production cycle, due to the movement of the machine table gantry 10, the liquid supply master bottle 11 shakes, generating bubbles. At this time, when the vacuum is connected, due to the shaking, the bubbles in the liquid supply master bottle 11 are quickly discharged, achieving rapid defoaming.

[0039] As Figure 4 shown, the liquid outlet of each of several liquid crystal replenishment bottles 21 is separately connected to a liquid replenishment solenoid valve 23, achieving separate control and automatic control of the liquid crystal replenishment bottles 21. When replacing the liquid crystal material, first open the liquid replenishment solenoid valve 23 of the cleaning liquid supply bottle 22, and flush the liquid supply master bottle 11 and the pipeline through the cleaning liquid supply bottle 22 to reduce the impact of replacing the material on the internal environment of the machine table and improve the product yield. Then open the liquid replenishment solenoid valve 23 of one of the liquid crystal replenishment bottles 21 to replenish the liquid supply master bottle 11. By setting several solenoid valves for liquid replenishment and liquid supply switching, full-automatic control is achieved. By using full-automatic control, the quality abnormalities caused by human intervention are reduced, and the yield is improved.

[0040] In the liquid supply system of the liquid crystal coating device of the present utility model, the liquid supply master bottle is arranged inside the machine table gantry. The liquid supply master bottle can be switched between connecting to the nitrogen end and connecting to the vacuum end through the liquid supply solenoid valve. Then, when connecting to the vacuum end and using the shaking generated by the movement of the machine table gantry to achieve defoaming. At the same time, several liquid crystal replenishment bottles are also arranged inside the liquid crystal coating device, and each liquid crystal replenishment bottle is separately controlled by a liquid replenishment solenoid valve, reducing the bubbles generated during liquid supply, avoiding quality abnormalities of the liquid crystal panel caused by bubbles, improving the yield, and reducing the production cost. Additionally, for different materials, the liquid supply master bottle and the pipeline are flushed through the cleaning liquid supply bottle, and then the liquid crystal replenishment bottles are independently controlled and switched to save the time for replacing the material; when replacing the liquid crystal replenishment bottle, it can also be replaced separately, enabling the replacement of the material without stopping the machine, and improving the equipment utilization rate.

[0041] The liquid crystal supply system of the liquid crystal coating device of the present utility model changes the liquid crystal bottle in the liquid crystal coating device into a liquid supply mother bottle with an inverted water droplet-shaped inner cavity, replenishes the liquid supply mother bottle and supplies liquid to the dropping unit by taking advantage of the gap during the automatic metering cycle of the liquid crystal coating device; and then uses the shaking of the liquid crystal coating device during the production cycle and combines with vacuum to perform defoaming operation, eliminating the risk of affecting the production of liquid crystal panels due to air bubbles.

[0042] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant is intended to cover non-exclusive inclusion, so that an article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed. Without more limitations, an element defined by the statement "including one..." does not exclude the existence of another identical element in the article or device including the said element. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The orientation or positional relationship indicated by "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation on the present utility model.

[0043] The above content is a further detailed description of the present utility model in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model belongs, without departing from the concept of the present utility model, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the protection scope of the present utility model.

Claims

1. A liquid crystal coating device liquid supply system, used for supplying liquid to a liquid crystal coating device, the liquid crystal coating device comprising: The machine gantry (10), a plurality of drop units (20) and a carrying platform (30) are characterized by comprising: A machine liquid supply system (1) is arranged in the machine gantry (10) and moves with the machine gantry (10), comprising: a liquid supply mother bottle (11) and a liquid supply solenoid valve (12), wherein the inlet of the liquid supply solenoid valve (12) is respectively connected to a nitrogen end and a vacuum end, and can be switched between the nitrogen end and the vacuum end, and the outlet of the liquid supply solenoid valve (12) is connected to an air inlet pipe (112) of the liquid supply mother bottle (11); the liquid outlet (114) of the liquid supply mother bottle (11) is respectively connected to the plurality of dripping units (20); The liquid crystal replenishment system (2) is arranged in the supporting platform (30), and comprises: a plurality of liquid crystal replenishment bottles (21) and at least one cleaning liquid supply bottle (22), wherein the liquid outlet of each liquid crystal replenishment bottle (21) and each cleaning liquid supply bottle (22) is individually connected to a replenishment electromagnetic valve (23), and the outlets of all the replenishment electromagnetic valves (23) are connected to the liquid inlet pipe (113) of the liquid supply mother bottle (11).

2. The liquid supply system for a liquid crystal coating device according to claim 1, characterized in that: A cavity (111) is provided inside the liquid supply mother bottle (11), the diameter of the cavity (111) decreases from top to bottom, and the air inlet pipe (112), the liquid inlet pipe (113) and the liquid outlet (114) are respectively connected to the cavity (111).

3. The liquid supply system for a liquid crystal coating device according to claim 2, characterized in that: The bottom of the cavity (111) is arc-shaped or conical.

4. The liquid supply system for a liquid crystal coating device according to claim 3, characterized in that: The curvature of the bottom of the arc-shaped cavity (111) ranges from 60° to 150°.

5. The liquid supply system for a liquid crystal coating device according to claim 3, characterized in that: The curvature of the bottom of the conical cavity (111) ranges from 60° to 150°.

6. The liquid supply system for a liquid crystal coating device according to claim 3, characterized in that: The liquid outlet (114) is connected to the center of the bottom of the cavity (111).

7. The liquid supply system for a liquid crystal coating device according to claim 1, characterized in that: When the liquid crystal coating device is in an automatic metering cycle, the liquid replenishment solenoid valve (23) connected to one of the liquid crystal replenishment bottles (21) is opened to replenish the liquid supply mother bottle (11); the inlet of the liquid supply solenoid valve (12) is connected to the nitrogen end, and the liquid crystal in the liquid supply mother bottle (11) is pressed into the plurality of dripping units (20) respectively.

8. The liquid supply system for a liquid crystal coating device according to claim 1, characterized in that: When the liquid crystal coating device is in a production cycle, the liquid replenishment solenoid valves (23) connected to all the liquid crystal replenishment bottles (21) are closed; the inlet of the liquid supply solenoid valve (12) is connected to the vacuum end to discharge the bubbles in the liquid supply mother bottle (11).

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