A supplementary net stretching device and method

Abstract

The application discloses an auxiliary net stretching device and a net stretching method, which comprises at least one pressing component in a "U" type structure, a main lifting driving device for driving the pressing component to descend and ascend, a pressing probe group comprising a plurality of probes arranged in a vertical direction, each probe being connected to the bottom of the pressing component along the "U" type structure of the pressing component, a secondary lifting device group, each probe being provided with a secondary lifting driving device, each secondary lifting driving device driving the corresponding probe to descend and ascend, and a pressure sensor group, each probe being provided with a pressure sensor, each pressure sensor being used for detecting the pressing degree of the corresponding probe. The pressing component in the "U" type structure and the pressing probe group are used for pressing, so that the wrinkles and gaps can be eliminated, the metal mask strip and the mask plate can be completely attached, and the net stretching welding yield of the metal mask strip 8 and the welding point firmness are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of OLED display, in particular to an auxiliary netting device and a netting method. BACKGROUND

[0002] OLED display panel has the advantages of thin thickness, low power consumption, bendable and flexible display, etc., and has become the development trend of the next generation of panel display in recent years.

[0003] The existing OLED panel is heated by an evaporation source in a vacuum environment, and the organic material is evaporated through the opening position of the metal mask plate to form an organic thin film on the substrate surface. The film forming position needs to be the specified light emitting position on the substrate, and the current of the substrate can be effectively transmitted to the OLED device for light emission. Therefore, the metal mask plate needs to have high position accuracy and stability, and needs to be closely attached to the substrate to prevent the organic material from evaporating to the wrong position and causing color mixing phenomenon.

[0004] During the manufacturing process of the OLED metal mask plate, high position accuracy is required to ensure that the organic material can be accurately evaporated to the light emitting area on the substrate. In addition, the firmness of the welding needs to be confirmed to avoid position accuracy deviation due to low firmness after welding. Figure 1 As shown in the figure, however, during the netting process, the single side of the metal mask strip 01 is subjected to force from multiple tensioning mechanisms. Due to the large number of tensioning mechanisms and different force application positions, wrinkles 02 are generated due to the unevenness of the tension. The wrinkles 02 cause gaps between the mask strip 01 and the mask plate 04, which seriously affect the welding yield and netting yield, leading to the falling off of the welding points and the position deviation during production or after use. In addition, the flatness of the metal mask plate 04 is also important, and the concave pit 03 will also cause gaps. SUMMARY

[0005] To overcome the deficiencies in the prior art, the purpose of the present application is to provide an auxiliary netting device and a netting method to improve the netting welding yield and welding point firmness of the metal mask strip.

[0006] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0007] An auxiliary netting device comprises:

[0008] At least one pressing component, which is a "U" shaped structure;

[0009] A main lifting driving device for driving the pressing component to descend and ascend;

[0010] A pressing probe group comprising a plurality of probes arranged in a vertical direction, each probe being connected to the bottom of the pressing component along the "U" shaped structure of the pressing component;

[0011] The secondary lifting device group is respectively provided with a secondary lifting driving device corresponding to each probe, and each secondary lifting driving device drives the corresponding probe to descend and ascend;

[0012] The pressure sensor group is respectively provided with a pressure sensor corresponding to each probe, and each pressure sensor is used to detect the pressing force of the corresponding probe.

[0013] Further, the lower pressing component is connected with the main lifting driving device through a connecting rod.

[0014] Further, the main lifting driving device and the secondary lifting driving device are a cylinder or an electric push rod.

[0015] The auxiliary net stretching device adopts the net stretching method, and the net stretching method comprises the following steps:

[0016] 1) The metal mask plate is loaded, the alignment action is performed, and it is confirmed that the position accuracy meets the requirements;

[0017] 2) The metal mask strip is loaded, the alignment action is performed, and it is confirmed that the position accuracy meets the requirements;

[0018] 3) The metal mask strip alignment is completed, the tension mechanism keeps the current position, and the auxiliary net stretching device is started;

[0019] 4) The lower pressing component is lowered to above the welding area of the welding spot;

[0020] 5) The lower pressing probe group is started, each probe starts to descend, and the probe is pressed against the metal mask strip and returns the pressure value;

[0021] 6) Each pressure sensor confirms the current pressure value S: if S < F, the descending value is continuously adjusted, and if S > F, the ascending value is adjusted;

[0022] 7) The steps 5) and 6) are repeatedly performed until it is confirmed that the current pressure value of each probe reaches S = F, and the lower pressing probe group action is completed;

[0023] 8) The laser device is lowered and turned on for welding;

[0024] 9) After the welding is completed, the laser device is raised and exits;

[0025] 10) Each probe is raised to the original point, and the pressure sensor confirms that the pressure value is zero;

[0026] 11) The lower pressing component is raised to the original point, and the auxiliary net stretching device stops the action;

[0027] 12) The metal mask strip net stretching and welding are completed.

[0028] Further, F = 5N.

[0029] The present application has the following beneficial technical effects:

[0030] 1. In the welding point area, the "back" type structure of the lower pressing component and the lower pressing probe group is used for pressing, which can eliminate wrinkles and gaps, so that the metal mask strip and the mask plate can be completely attached, and the screen welding yield and the welding point firmness of the metal mask strip are improved;

[0031] 2. The present application can solve the problem of wrinkles caused by uneven stress of the metal mask strip, reduce the risk of color mixing, and improve the color mixing phenomenon;

[0032] 3. The present application can solve the gap problem caused by the poor flatness of the metal mask plate and the metal mask strip. BRIEF DESCRIPTION OF DRAWINGS

[0033] The present application will be further described in detail below in combination with the drawings and specific embodiments;

[0034] Figure 1 is a schematic view of wrinkles and gaps generated in the screen process of the mask strip;

[0035] Figure 2 is a left view of the auxiliary screen device of the present application;

[0036] Figure 3 is a top view of the auxiliary screen device of the present application;

[0037] Figure 4 is a screen method using the auxiliary screen device of the present application;

[0038] Figure 5 is Figure 4 is a sectional view of A-A in FIG. 8;

[0039] Figure 6 is a schematic view of the transverse combination of multiple lower pressing components;

[0040] Figure 7 is a schematic view of the longitudinal combination of multiple lower pressing components;

[0041] Figure 8 is a schematic view of another scheme of the longitudinal combination of multiple lower pressing components. DETAILED DESCRIPTION

[0042] Please refer to Figures 2-3 The auxiliary screen device of the present application comprises:

[0043] At least one lower pressing component 4, the lower pressing component 4 is in a "back" type structure, which can expose the middle welding point area, facilitating the welding of the upper laser device;

[0044] A main lifting driving device 2 for driving the lower pressing component 4 to descend and ascend;

[0045] The pressing probe assembly includes multiple probes 6 arranged vertically, with each probe 6 connected to the bottom of the pressing component 4 along the "U"-shaped structure of the pressing component 4; the number of probes 6 is not limited, and their arrangement should be synchronized with the pressing component 4; the material of the probes 6 is not limited, but their main body can be made of a rigid material with a long service life, and the probe part can be made of a softer material such as rubber, so as not to cause damage when pressing down on the metal mask strip 8;

[0046] The secondary lifting device group is provided with a secondary lifting drive device 5 for each probe 6, and each secondary lifting drive device 5 drives the corresponding probe 6 to descend and rise.

[0047] Pressure sensor group 1, each probe 6 is equipped with a pressure sensor, and each pressure sensor is used to detect the downward pressure of the corresponding probe 6.

[0048] The pressing component 4 is connected to the main lifting drive device 2 via a connecting rod. The purpose of setting the connecting rod is to extend outward in the horizontal plane to avoid interference between the laser device and the pressure sensor during the movement of the mechanism.

[0049] The main lifting drive device 2 and the secondary lifting drive device 5 can be cylinders or electric push rods, etc.

[0050] The pressing component 4 of the present invention can have multiple combinations, such as Figure 6 As shown, multiple U-shaped pressing components 4 are horizontally combined, and can be stacked horizontally for multiple rows of welding points; as Figures 7-8 As shown, multiple press-down components 4 with a U-shaped structure are longitudinally combined, and the longitudinal arrangement can be stacked according to the width of the metal mask strip 8 and the size of the solder joint area.

[0051] like Figures 4-5 As shown, the net-casting method using the above-mentioned auxiliary net-casting device includes the following steps:

[0052] 1) Load the metal mask 7, perform alignment, and confirm that the positional accuracy meets the requirements;

[0053] 2) Load the metal mask strip 8, perform alignment, and confirm that the positional accuracy meets the requirements;

[0054] 3) Once the metal mask strip 8 is aligned, the tension mechanism remains in its current position, and the auxiliary tensioning device is activated;

[0055] 4) Lower the pressing component 4 above the welding area of ​​the weld point;

[0056] 5) Start the pressure probe group, each probe 6 begins to descend, the probe 6 presses against the metal mask strip 8 and transmits the pressure value back;

[0057] 6) Each pressure sensor confirms the current pressure value S: if S<F, continue to adjust the down value, if S>F, adjust the up value, wherein F=5N;

[0058] 7) Repeat the above steps 5)-6) until each probe 6 confirms the current pressure value S=F, complete the down probe group action;

[0059] 8) The laser device is lowered and the welding is started;

[0060] 9) After the welding is completed, the laser device is raised and exits;

[0061] 10) Each probe 6 is raised to the original position, and the pressure sensor confirms that the pressure value is zero;

[0062] 11) The down component 4 is raised to the original position, and the auxiliary tension device stops working;

[0063] 12) Complete the metal mask strip 8 tensioning and welding.

[0064] In the welding point area, the down component 4 and the down probe group with a back type structure are used for down pressing, which can eliminate the wrinkles and gaps, so that the metal mask strip 8 and the mask plate can be completely attached, and the tensioning and welding yield of the metal mask strip 8 and the welding point firmness are improved.

[0065] The above describes the embodiments of the present application in combination with the drawings, but the present application is not limited to the above specific embodiments, and the above specific embodiments are illustrative rather than limiting the present application. Those skilled in the art should understand that the technical solutions recorded in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application.

Claims

1. An auxiliary net stretching device, characterized by: It comprises: at least one pressing component, which is a "U" shaped structure; a main lifting driving device for driving the pressing component to descend and ascend; a pressing probe group, which comprises a plurality of probes arranged in a vertical direction, each probe being connected to the bottom of the pressing component along the "U" shaped structure of the pressing component; a secondary lifting device group, each corresponding to a probe and comprising a secondary lifting driving device, each secondary lifting driving device driving the corresponding probe to descend and ascend; a pressure sensor group, each corresponding to a probe and comprising a pressure sensor, each pressure sensor being used to detect the pressing force of the corresponding probe; the pressing component is connected to the main lifting driving device through a connecting rod; the main lifting driving device and the secondary lifting driving device are air cylinders or electric push rods.

2. A method of stretching a web using the auxiliary web stretching device according to claim 1, characterized in that: The net stretching method comprises the following steps: 1) loading the metal mask plate, performing alignment and confirming that the position accuracy meets the requirements; 2) loading the metal mask strip, performing alignment and confirming that the position accuracy meets the requirements; 3) completing the alignment of the metal mask strip, the tension mechanism keeping the current position, and starting the auxiliary net stretching device; 4) lowering the pressing component to above the soldering area of the welding points; 5) starting the pressing probe group, each probe starting to descend, and the probe pressing the metal mask strip and returning the pressure value; 6) each pressure sensor confirming the current pressure value S: if S < F, continue to adjust the descending value, if S > F, adjust the ascending value; 7) repeating steps 5) and 6) until it is confirmed that the current pressure value of each probe reaches S = F, and the pressing probe group action is completed; 8) lowering the laser device and starting the welding; 9) after completing the welding, the laser device is raised and exits; 10) each probe is raised to the original position, and the pressure sensor confirms that the pressure value is zero; 11) the pressing component is raised to the original position, and the auxiliary net stretching device stops working; 12) completing the net stretching and welding of the metal mask strip.

3. The netting method of claim 2, wherein: F = 5N.

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