Closed organic electroluminescent material stripping and collecting device

Abstract

The utility model relates to a closed organic electroluminescent material stripping and collecting device. The device comprises a shell, a storage unit, a dry ice generator, a material recovery unit, a primary collection unit, a secondary collection unit, a fan and a gas balance unit. The shell comprises a sealed chamber; the storage unit is arranged in the sealed chamber; the dry ice generator is arranged in the sealed chamber; the material recovery unit is arranged in the sealed chamber, and the storage unit is communicated with the material recovery unit; the primary collection unit is communicated with the material recovery unit through a pipeline; the secondary collecting unit is used for collecting materials which are not collected by the primary collecting unit; the fan is used for controlling the material flow direction; and the gas balancing unit is used for enabling the material to circularly flow along with the gas. About 80% of materials attached to the baffle in the evaporation process can be recycled and reused, the materials are recycled in a physical stripping mode, and the efficiency and the purity performance quality of the recycled materials are improved through the device.

Description

Technical Field

[0001] This application relates to the technical field of organic electroluminescent material stripping and collection, and particularly relates to a closed organic electroluminescent material stripping and collection device. Background Art

[0002] Currently, the core of OLED display technology lies in the evaporation process. The organic electroluminescent material is deposited on the glass substrate with the completed TFT circuit through evaporation. During the evaporation process, a large amount of material (nearly 80%) adheres to the anti-deposition plate (Al product) that protects the evaporation chamber. Coupled with the high value of similar organic electroluminescent materials, the production cost of the entire OLED display screen remains high.

[0003] Currently, the traditional collection method has no collection device. It is just a stripping cavity similar to a sandblasting machine. After the stripping is completed, the materials are collected manually in the stripping chamber. This causes a large waste and brings an uncontrollable pollution risk during the operation process.

[0004] For the traditional stripping process, due to the relatively firm adhesion between the material and the anti-deposition plate, and the certain polarity of the material itself, a large amount of static electricity is generated during the stripping process. Its particles are extremely small and the mass is very light, similar to dust in the air. In the actual production process of the traditional stripping process, due to the problems of airtightness and system return air, a large amount of materials float everywhere with the flow of the process gas. The materials on the chamber are severely adsorbed, and it is impossible to collect them in large quantities. Manual material collection with tools is required, resulting in extremely low efficiency. The most critical thing is that new impurities are introduced, resulting in a decrease in the purity of the material and a decrease in the purification rate in the subsequent purification process. Summary of the Utility Model

[0005] In view of the above-mentioned disadvantages of the prior art, the purpose of this application is to provide a closed organic electroluminescent material stripping and collection device to solve the problems that when the organic electroluminescent material is stripped, due to its light weight and electrostatic adhesion characteristics, it diffuses in the air, on the one hand, causing material loss, and on the other hand, easily leading to the decline of the purity of the material to be collected due to the doping of non-homogeneous dust or foreign objects; as few process operations as possible are added during the collection process to improve the collection efficiency and collection quality.

[0006] To achieve the above purpose and other related purposes, this application provides a closed organic electroluminescent material stripping and collection device, including:

[0007] A housing, the housing includes a sealed chamber;

[0008] A placement unit, the placement unit is arranged in the sealed chamber;

[0009] A dry ice generator, which is arranged outside the sealed chamber and communicated with the sealed chamber;

[0010] A material recovery unit, which is arranged inside the sealed chamber, and the placement unit is communicated with the material recovery unit;

[0011] A primary collection unit, which is arranged outside the housing, and the primary collection unit is communicated with the material recovery unit through a pipeline;

[0012] A secondary collection unit, which is arranged outside the housing, and the secondary collection unit is communicated with the primary collection unit through a pipeline;

[0013] A fan, which is respectively communicated with the secondary collection unit and the sealed chamber;

[0014] A gas balance unit, which is connected to the sealed chamber.

[0015] In some embodiments of the present utility model, it further includes any one or more of the following features:

[0016] a1) The material recovery unit is located below the placement unit;

[0017] a2) The placement unit is provided with a plurality of communication holes, and the communication holes are communicated with the material recovery unit;

[0018] a3) The placement unit is a placement rack or a placement net.

[0019] In some embodiments of the present utility model, it further includes any one or more of the following features:

[0020] b1) The dry ice generator is a dry ice machine;

[0021] b2) The dry ice machine is provided with a dry ice nozzle, and the dry ice nozzle is located above the placement unit.

[0022] In some embodiments of the present utility model, the material recovery unit is a material collection funnel, and the diameter of the material collection funnel gradually decreases from the end close to the placement unit to the end far from the placement unit.

[0023] In some embodiments of the present utility model, the primary collection unit includes a cyclone and a primary collection box, the primary collection box is arranged at the bottom of the cyclone, and the cyclone further includes a first air inlet and a first air outlet, and the first air inlet is communicated with the material recovery unit through a pipeline.

[0024] In some embodiments of the present utility model, the secondary collection unit includes a secondary collection box and a filter screen disposed in the secondary collection box. The secondary collection unit further includes a second air inlet and a second air outlet. The second air inlet is communicated with the first air outlet, and the second air outlet is communicated with the blower through a pipeline.

[0025] In some embodiments of the present utility model, the mesh number of the filter screen is 800 - 1000 meshes.

[0026] In some embodiments of the present utility model, the device further includes a heating unit, and the heating unit is communicated with the sealed chamber through a pipeline.

[0027] In some embodiments of the present utility model, the device further includes an electrostatic eliminating ion air knife, and the electrostatic eliminating ion air knife is disposed on the chamber wall of the sealed chamber.

[0028] In some embodiments of the present utility model, the device further includes a defogging air knife, and the defogging air knife is disposed on the chamber wall of the sealed chamber.

[0029] Compared with the prior art, the beneficial effects of the present application are as follows:

[0030] The closed - type organic electroluminescent material stripping and collection device of the present application can recycle and reuse nearly 80% of the materials attached to the anti - sticking plate protecting the evaporation chamber during the evaporation process. Based on the characteristics of the materials themselves, a physical stripping method is adopted for material recovery. This device has been improved both in terms of efficiency and the purity and performance quality of the recycled materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It shows a schematic structural diagram of the closed - type organic electroluminescent material stripping and collection device of the present application.

[0032] Description of Component Labels:

[0033] 1 Housing

[0034] 101 Sealed Chamber

[0035] 2 Placing Unit

[0036] 3 Material Recovery Unit

[0037] 4 Primary Collection Unit

[0038] 401 Cyclone

[0039] 4011 First Air Inlet

[0040] 4012 First Air Outlet

[0041] 402 Primary Collection Box

[0042] 5 Secondary collection unit

[0043] 501 Secondary collection bin

[0044] 5011 Second air inlet

[0045] 5012 Second air outlet

[0046] 6 Fan

[0047] 7 Gas balance unit

[0048] 8 Heating unit

[0049] 9 Demisting air knife

[0050] 10 Anti-static ion air knife

[0051] 11 Dry ice generator

[0052] 12 Material inlet / outlet door Detailed implementation manners

[0053] The following further elaborates the detailed implementation manners of this application in conjunction with the attached drawings. These implementation manners are only used to illustrate this application and are not a limitation to this application.

[0054] The orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the attached drawings. It is only for the convenience of describing this application 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, so it cannot be understood as a limitation to this application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0055] In the description of this application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0056] In addition, in the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0057] See Figure 1, an embodiment of the present application provides a closed organic electroluminescent material stripping and collection device, including a housing 1 (the housing 1 includes a sealed chamber 101), a placement unit 2, a dry ice generator 11, a material recovery unit 3, a primary collection unit 4, a secondary collection unit 5, a blower 6, an electrostatic elimination ion air knife 10, a demisting air knife 9, a heating unit 8, a gas balance unit 7, pipelines, material inlet and outlet doors, etc.

[0058] In the embodiment of the present application, the sealed chamber 101 can be formed, for example, by installing sealing components in the active area of the chamber. The sealing components can be, for example, sealing covers, sealing strips, etc., to confirm that the chamber is sealed, so as to ensure that the dust working in the sealed chamber 101 will not disperse. Specifically, the housing 1 can be, for example, a frame built with metal profiles and enclosed by metal plates to form the housing 1. The metal profiles can be, for example, aluminum profiles or square steel, etc. The metal plates can be, for example, aluminum plastic plates or stainless steel plates, etc. It is a negative pressure chamber during normal operation.

[0059] In the embodiment of the present application, the placement unit 2 is arranged in the sealed chamber 101. First, the baffle plate with the attached organic electroluminescent material is placed on the placement unit 2 through the material inlet and outlet 12.

[0060] In the embodiment of the present application, the dry ice generator 11 is arranged outside the sealed chamber 101 and is communicated with the sealed chamber 101. The dry ice generator 11 can be, for example, a dry ice machine for preparing dry ice. Further, the type and size of the dry ice machine can be set according to specific requirements. The dry ice machine is provided with a dry ice nozzle. During use, the dry ice generator is turned on to generate high-pressure dry ice, and the high-pressure dry ice is directly sprayed onto the aforementioned baffle plate with the attached organic electroluminescent material for material stripping. Under the action of thermal expansion and contraction and the impact of high-pressure gas, the material can be separated from the baffle plate. Specifically, the gun head of the dry ice generator is moved for stripping in different areas.

[0061] In the embodiment of the present application, the material recovery unit 3 is arranged in the sealed chamber 101, and the placement unit 2 is communicated with the material recovery unit 3. In a specific embodiment, the material recovery unit 3 is located below the placement unit 2, preferably directly below. More specifically, the placement unit 2 is provided with a plurality of communication holes, and the size, shape, and position of the communication holes or the holes of the placement net can be set according to needs. The placement unit 2 can be, for example, a placement rack or a placement net, etc.

[0062] In the embodiment of the present application, specifically, the material recovery unit 3 is a material collection funnel, the material collection funnel is connected to the placement unit 2, and the diameter of the material collection funnel gradually decreases from the end close to the placement unit 2 to the end far from the placement unit 2, that is, it is in an inverted trapezoidal structure.

[0063] In the embodiment of the present application, the primary collection unit 4 is arranged outside the housing 1, and the primary collection unit 4 is communicated with the material recovery unit 3. Specifically, the primary collection unit 4 includes a cyclone 401 and a primary collection box 402. The primary collection box 402 is arranged at the bottom of the cyclone 401. The cyclone 401 further includes a first air inlet 4011 and a first air outlet 4012. The first air inlet 4011 is communicated with the material recovery unit 3 through a pipeline. During use, after the material and the baffle are separated, the gas balance unit 7 is used to make the material circulate with the gas. The material further passes through the cyclone 401 and reaches the primary collection box 402 for deposition by relying on the gravity of the material, and about 80% of the material can be collected.

[0064] In the embodiment of the present application, the secondary collection unit 5 is arranged outside the housing 1. The secondary collection unit 5 is communicated with the primary collection unit 4 through a pipeline and is used to collect the material not collected by the primary collection unit 4. The fan 6 is respectively communicated with the secondary collection unit 5 and the sealed chamber 101. The fan 6 is used to ensure the flow direction of the material (dust) of the whole device. The air flow control is carried out by the air extraction of the fan 6 and the pressure balance of the whole equipment.

[0065] Specifically, the secondary collection unit 5 includes a secondary collection box 501 and a filter screen arranged in the secondary collection box 501. The secondary collection unit 5 further includes a second air inlet 5011 and a second air outlet 5012. The second air inlet 5011 is communicated with the first air outlet 4012. The second air outlet 5012 is communicated with the fan 6 through a pipeline, and the fan 6 circulates back to the sealed chamber 101 through the pipeline. During use, the remaining 20% of the material after being collected by the primary collection box 402 will continue to flow with the gas to the secondary collection box 501. The filter screen in the secondary collection box 501 is a high-mesh filter screen, and the mesh number can be, for example, 800-1000 meshes. The separation of the material and the gas is realized through the filter screen, so as to conduct secondary collection of the remaining material.

[0066] In the embodiment of the present application, the gas balance unit 7 is connected to the sealed chamber 101. The gas balance unit 7 can be, for example, a semi-open valve. This device will be opened when the internal pressure of the sealed chamber 101 is greater than the external pressure and will be closed when it is in negative pressure. The gas balance unit 7 is used to make the material circulate with the gas. Through the cooperation of the gas balance unit 7 and each pipeline, the air flow and the material flow direction of the device can be accurately controlled.

[0067] During use, the gas enters the cyclone 401 through the pipeline via the first air inlet 4011, and the material is collected by the primary collection box 402. Further, the uncollected material enters the secondary collection box 501 with the gas from the first air outlet 4012 via the second air inlet 5011. The filter screen separates the material and the gas, and then passes through the fan 6 and returns to the sealed chamber 101 through the pipeline. The gas balance unit 7 controls the gas circulation; if the chamber pressure exceeds, the exhaust will increase. Under normal circumstances, 80% of the gas will return to the sealed chamber 101.

[0068] The primary collection unit 4 and the secondary collection unit 5 are both arranged outside the housing 1. The advantage of this setting is that after the stripping process is completed, the material can be collected without opening the sealed chamber 101, so that the sealed chamber 101 will not be contaminated due to material collection; if the fan 6, the primary collection unit 4, and the secondary collection unit 5 are inside the sealed chamber 101, it will cause the outer wall to adhere to the material, which is not conducive to the process requirements. The primary collection unit 4 and the secondary collection unit 5 are both in a sealed state.

[0069] In the embodiment of the present application, the static elimination ion air knife 10 is arranged on the chamber wall of the sealed chamber 101 to solve the problem that the material is electrostatically adsorbed on the sealed chamber 101 after stripping, resulting in material loss.

[0070] In the embodiment of the present application, the defogging air knife 9 is arranged on the chamber wall of the sealed chamber 101 to solve the problem that the window fogs up due to low temperature during the stripping process, which affects the overall stripping efficiency. The part of the device facing the operation surface is a transparent glass plate, that is, the window. Because the temperature of dry ice is relatively low, it will cause fogging (similar to the car window in winter), so the defogging air knife 9 is added.

[0071] In the embodiment of the present application, the heating unit 8 is connected to the sealed chamber 101 through a pipeline. Ensure that the temperature of the entire device is controlled within the process range. The heating unit 8 selects a thermal resistance heater, and the temperature control range is 100 - 300 °C, and the maximum operating temperature shall not exceed 300 °C. Usually, the heating unit needs to be started during normal stripping. Part of the heated gas will be directly supplemented into the sealed chamber 101 through the pipeline.

[0072] In the embodiment of the present application, in addition, filters can be set at the joints of each pipeline to physically separate the material and the gas. The filter can be, for example, a filter screen.

[0073] The usage process of the closed organic electroluminescent material stripping and collection device provided by the embodiment of the present application:

[0074] ① Baffle placement, ② Baffle stripping, ③ Material collection

[0075] Specifically: First, place the baffle plate attached with the organic electroluminescent material on the storage unit 2 through the inlet and outlet of the baffle plate. Start the dry ice generator 11 to generate high-pressure dry ice, and directly spray the high-pressure dry ice onto the above-mentioned baffle plate for material stripping. Under the action of thermal expansion and contraction and the impact of high-pressure gas, the material is separated from the baffle plate. Use the gas balance unit 7 of the device to make the material circulate with the gas. The material will pass through the cyclone 401 and reach the primary collection box 402 by relying on the gravity of the material for deposition. Approximately 80% of the material can be collected in this step. The remaining 20% of the material will continue to flow with the gas to the secondary collection box 501. A high-mesh filter screen is configured in the secondary collection box 501 to separate the material from the gas, thereby performing secondary collection of the material. While stripping and collecting, after all the baffle plates are stripped, a large amount of gas purging will be carried out on the stripping chamber (using a normal dry ice mixer for purging) to ensure that all the materials can enter the primary collection box 402 and the secondary collection box 501 for deposition, and then the materials are collected, screened, and packaged.

[0076] In summary, the closed-type organic electroluminescent material stripping and collection device of the present application involves collecting after powder stripping. By adding a collection unit (primary collection unit 4, secondary collection unit 5) for organic electroluminescent materials arranged outside the housing 1 after material stripping is realized in the sealed chamber 101 of the housing 1, controlling the wind speed by the fan 6 and enabling the solid-gas mixture containing the material to have a longer movement trajectory, and achieving balance through the rotational speed of the fan and the gas pressure and flow rate actually entering the sealed chamber 101 by the dry ice generator, controlling the gas flow and chamber pressure of the entire device, ensuring that the materials in the sealed chamber 101 can be efficiently separated and settled in the primary collection unit 4 and the secondary collection unit 5, thereby reducing the pollution of material dust to external personnel, realizing the separation of material powder from the baffle plate attached with the material without human intervention, and ultimately achieving the purpose of material stripping and recovery.

[0077] In summary, the present application effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0078] The above embodiments are only illustrative of the principles and effects of the present application, and are not used to limit the present application. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present application should still be covered by the claims of the present application.

Claims

1. A closed organic electroluminescent material stripping and collecting device, characterized in that: include: A housing (1), the housing (1) comprising a sealed chamber (101); A storage unit (2), wherein the storage unit (2) is arranged in the sealed chamber (101); a dry ice generator (11), the dry ice generator being arranged outside the sealed chamber (101) and being in communication with the sealed chamber (101); A material recovery unit (3), wherein the material recovery unit (3) is arranged in the sealed chamber (101), and the storage unit (2) is connected to the material recovery unit (3); A primary collection unit (4), the primary collection unit (4) being arranged outside the housing (1), the primary collection unit (4) being connected to the material recovery unit (3) via a pipeline; A secondary collection unit (5), the secondary collection unit (5) being arranged outside the housing (1), the secondary collection unit (5) being connected to the primary collection unit (4) via a pipeline; A fan (6), wherein the fan (6) is respectively connected to the secondary collection unit (5) and the sealed chamber (101); A gas balancing unit (7), wherein the gas balancing unit (7) is connected to the sealed chamber (101).

2. The enclosed organic electroluminescent material stripping and collecting device according to claim 1, characterized in that: Also includes any one or more of the following features: a1) the material recovery unit (3) is located below the storage unit (2); a2) the storage unit (2) is provided with a plurality of communication holes, and the communication holes are connected to the material recovery unit (3); a3) The storage unit (2) is a storage rack or a storage net.

3. The enclosed organic electroluminescent material stripping and collecting device according to claim 1, characterized in that: Also includes any one or more of the following features: b1) the dry ice generator is a dry ice machine; b2) The dry ice machine is provided with a dry ice spray head, and the dry ice spray head is located above the storage unit (2).

4. The enclosed organic electroluminescent material stripping and collecting device according to claim 1, characterized in that: The material recovery unit (3) is a material collecting funnel, and the diameter of the material collecting funnel gradually decreases from an end close to the placement unit (2) to an end far from the placement unit (2).

5. The enclosed organic electroluminescent material stripping and collecting device according to claim 1, characterized in that: The primary collection unit (4) comprises a cyclone barrel (401) and a primary collection box (402), wherein the primary collection box (402) is arranged at the bottom of the cyclone barrel (401), and the cyclone barrel (401) further comprises a first air inlet (4011) and a first air outlet (4012), wherein the first air inlet (4011) is connected to the material recovery unit (3) via a pipeline.

6. The enclosed organic electroluminescent material stripping and collecting device according to claim 5, characterized in that: The secondary collection unit (5) comprises a secondary collection box (501) and a filter screen arranged in the secondary collection box (501), and the secondary collection unit (5) further comprises a second air inlet (5011) and a second air outlet (5012), wherein the second air inlet (5011) is connected to the first air outlet (4012), and the second air outlet (5012) is connected to the fan (6) via a pipeline.

7. The enclosed organic electroluminescent material stripping and collecting device according to claim 6, characterized in that: The mesh number of the filter is 800 to 1000 meshes.

8. The enclosed organic electroluminescent material stripping and collecting device according to claim 1, characterized in that: The device further comprises a heating unit (8), wherein the heating unit (8) is connected to the sealed chamber (101) via a pipeline.

9. The closed organic electroluminescent material stripping and collecting device according to claim 1, characterized in that: The device further comprises a static electricity removal ion wind knife (10), wherein the static electricity removal ion wind knife (10) is arranged on the cavity wall of the sealed cavity (101).

10. The enclosed organic electroluminescent material stripping and collecting device according to claim 1, characterized in that: The device further comprises a demisting air knife (9), wherein the demisting air knife (9) is arranged on the cavity wall of the sealed cavity (101).

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