Method for regenerating bonding structure using frame

Abstract

The present invention relates to a method for regenerating a joining structure using a frame, and more particularly, to a method for regenerating a joining structure using a frame, which, when processing a frame, such as a mask frame, which needs to be manufactured in accordance with a precise design in accordance with specifications, shapes, materials, and the like, supplements the thickness of a frame that is determined to be defective and discarded due to a loss in thickness. Therefore, the regeneration method of the joint structure of the utilization frame can effectively use waste cost and resources through reuse and reutilization.

Description

Technical Field

[0001] The present invention relates to a method for regenerating a joint structure of a utilized frame, and more particularly to a method for regenerating a joint structure of a utilized frame, in which the thickness of a frame that is judged as defective and discarded due to thickness loss is supplemented when processing a frame that needs to be precisely designed and manufactured according to specifications, shapes, and materials, such as a mask frame, thereby effectively using discarded costs and resources through reuse and recycling. Background Art

[0002] Generally speaking, a mask frame refers to a rectangular frame provided to support the outer contour of a deposition mask during the process of depositing an organic light emitting layer or a metal electrode on an insulating substrate when manufacturing an organic light emitting diode display.

[0003] The deposition mask divides each pattern according to the specifications of the display panel (organic light emitting display device) designed according to the requirements of the customer enterprise, so that the deposition material only passes through the corresponding pattern and performs the mask.

[0004] In addition, when the deposition mask as described above is joined to the mask frame, a plurality of strip-shaped wires are used to form mask lines in the form of a go board arranged vertically and horizontally, and grooves in the form of grooves into which each wire can be inserted and joined are formed on the corresponding mask frame.

[0005] However, in the mask frame as described above, in order to make the strip-shaped wire material constitute the mask lines and be joined to the grooves of the mask frame and divided and joined according to the set pattern specifications, the grooves formed (cutting) in the mask frame will change according to customer requirements when processing the mask frame.

[0006] At this time, the mask frame, whose material itself is very expensive, will be discarded if it cannot be used anymore due to a change in the model it is manufactured for. Or, in some cases, after removing the strip-shaped mask line wire depending on the degree of change in the model, the groove surface is flattened in order to reuse the mask frame, and then the changed groove is processed and reused.

[0007] Among them, if the thickness of the processed mask frame is relatively thick compared to the precise thickness that meets the display panel specifications, it needs to be re-grinded according to the deposition mask. If it is relatively thin, it will need to be discarded because it cannot be recognized by the sensor, resulting in cost and time losses.

[0008] As the prior art as described above, a “method for manufacturing an organic light emitting display device” is disclosed.

[0009] The prior art is characterized in that it includes: step 2 of separating the metal mask welded to the upper surface of the metal frame; step 2 of flattening the upper surface of the metal frame; step 2 of determining whether the thickness of the metal frame is less than a predetermined thickness; step 2 of joining a supplementary component to the upper surface of the metal frame when the thickness of the metal frame is less than the predetermined thickness; and step 2 of welding the metal mask to the upper side surface of the metal frame to which the supplementary component is joined.

[0010] Therefore, the present invention relates to a method for manufacturing a high-resolution organic light-emitting display device.

[0011] That is, in the related art, if the thickness measured when the metal frame is planarized is smaller than a predetermined thickness, the thickness is supplemented by welding a supplementary material to the metal mask.

[0012] However, in the prior art, when the measured thickness of the metal frame is less than a specified value, welding is performed after the supplementary parts are joined by cold or hot rolling processes or adhesives. Therefore, the thickness may change during welding due to cold or hot rolling and deformation of the adhesive.

[0013] In addition, in the case of simple welding, surface damage may occur on the welding surface due to reasons such as pores, welding marks and bubble marks.

[0014] As described above, when the supplementary member is joined and welded to supplement the thickness of the metal frame, the thickness may change and surface damage may occur, which may further cause errors when joining the deposition mask.

[0015] Prior art literature

[0016] Patent Literature

[0017] (Patent Document 0001) Korean registered patent No. 10-2218005 (2021.02.15.) Summary of the invention

[0018] The present invention aims to solve the existing problems as described above. The purpose of the present invention is to provide a method for recycling the joint structure of a frame by processing the thickness of a mask frame that has been discarded due to incorrect processing of the mask frame and incorrect identification of the thickness caused by design changes of the display panel, thereby saving the costs incurred in the process of disposal and sales and reusing it.

[0019] Another object of the present invention is to provide a method for reproducing a bonding structure using a frame, which can bond a sheet material to a mask frame and process its thickness according to the design, thereby flexibly coping with erroneous processing and design changes.

[0020] Another object of the present invention is to provide a method for regenerating the bonding structure of the frame, which can reduce the waste resources of the mask frame made of expensive materials such as invar and stainless steel (SUS) and effectively utilize them, thereby ensuring their utilization rate and economy.

[0021] Another object of the present invention is to provide a method for regenerating the joining structure of the frame by which a sheet material can be joined while being precisely and firmly fixed to a mask frame, thereby preventing defects caused by twisting during welding, and preventing warping and gaps between materials after welding.

[0022] Another object of the present invention is to provide a method for regenerating a joint structure utilizing a frame that can prevent deformation of the material caused by welding and prevent bubbles, pores, and discoloration that occur during welding, thereby maintaining excellent quality.

[0023] In order to achieve the above-mentioned purpose, the present invention is characterized in that: as a regeneration method of a joint structure of a frame that can reuse a mask frame joined to a deposition mask according to the specifications of a display panel, the method includes: a classification step of classifying products that do not reach the designed thickness of the mask frame; a material preparation step of preparing a sheet material that is cut into an area relatively larger than the specifications and size of the mask frame classified by the classification step and has a thickness greater than the required thickness of the display panel; a rough cutting step of processing the surfaces of the mask frame and the sheet material that are precisely attached to each other classified by the classification step and the material preparation step; a joining step of arranging the sheet material flattened by the rough cutting step on the upper side surface of the mask frame and joining it by welding; and a grinding step of grinding the sheet material welded to the mask frame by the joining step according to the required thickness of the display panel.

[0024] Preferably, the rough cutting step includes: a planarizing step of planarizing the upper side of the mask frame and the upper and lower sides of the sheet material; and a first cleaning step of removing foreign matter by washing the surface of the mask frame and the sheet material.

[0025] Preferably, it also includes: a groove processing step and a protrusion processing step, so that the surfaces flattened by the flattening processing step are precisely fixed by embedding and combining with each other; in the groove processing step, a seating groove is processed along the length direction on the upper side surface of the mask frame, and in the protrusion processing step, a seating protrusion corresponding to the seating groove is formed by processing the two side portions of the lower side surface of the sheet material.

[0026] Preferably, the joining step comprises: a configuration step of configuring the sheet material to the upper side of the mask frame through the placement groove and the placement protrusion in a stable and close manner; and a welding step of welding the mask frame and the sheet material.

[0027] Preferably, the welding step includes: a first weld for welding the mask frame and two side surfaces of the placement groove; and a second weld for welding the inner side of the edge of the mask frame.

[0028] Preferably, the grinding step includes: a cutting step of removing the solder joints formed on the mask frame and the sheet material in the welding step; a mid-cutting step of grinding the thickness of the mask frame and the sheet material after the solder joints are removed in the cutting step according to the specifications of the display panel; and a finishing step of performing groove, recess and hole processing and flatness tolerance and chamfering operations on the mask frame processed according to the thickness in the mid-cutting step.

[0029] Preferably, it also includes: an acceptance step of performing acceptance on the mask frame after being ground in the grinding step; the acceptance step includes: a measuring step of measuring the thickness, flatness and tolerance of the mask frame manufactured in the grinding step, so as to classify substandard products and normal products; a second cleaning step of removing foreign matter and dirt from the mask frame classified as a normal product in the measuring step; and a packaging step of packaging the mask frame after the foreign matter is removed in the second cleaning step.

[0030] By using the regeneration method using the joint structure of the frame according to the present invention, the thickness of the mask frame that has been discarded due to problems such as thickness changes and misidentification due to incorrect processing of the mask frame combined according to the specifications of the display panel and design changes of the display panel can be processed, thereby saving the costs incurred during the disposal and sales process and reusing it.

[0031] According to the present invention, the sheet material can be joined to the mask frame and its thickness can be processed according to the design of the display panel, thereby flexibly coping with erroneous processing and design changes.

[0032] Through the present invention, waste resources of mask frames made of expensive materials such as invar and stainless steel (SUS) can be reduced and effectively utilized, thereby ensuring their utilization rate and economy.

[0033] According to the present invention, the sheet material can be joined while being precisely and firmly fixed to the mask frame, thereby preventing defects caused by distortion during welding, and preventing warping and gaps between materials after welding.

[0034] The present invention can prevent deformation of materials caused by welding, and can also prevent bubbles, pores and discoloration during welding, thereby maintaining excellent quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a sequence diagram illustrating a reproducing method using a joint structure of a frame according to the present invention.

[0036] Figure 2 This is a sequence diagram illustrating a specific sequence of the rough cutting steps according to the present invention.

[0037] Figure 3 This is a sequence diagram illustrating a specific sequence of bonding steps according to the present invention.

[0038] Figure 4 This is a sequence diagram illustrating a specific sequence of grinding steps according to the present invention.

[0039] Figure 5 It is a sequence diagram illustrating the specific sequence of the acceptance steps according to the present invention.

[0040] Figure 6 It is a cross-sectional view showing a mask frame in contact with a sheet member according to the present invention.

[0041] Figure 7 This is a conceptual diagram illustrating a weld according to the present invention.

[0042] Figure 8 This is a cross-sectional view illustrating a fusion state by a weld according to the present invention.

[0043] Fig. 9 The images are taken of the welding points and the mask surface of the sheet component by welding according to the present invention.

[0044] [Description of Reference Numerals]

[0045] 10: Mask frame

[0046] 11: Placement slot

[0047] 20: Sheet materials

[0048] 21: Place the bump

[0049] 22: First weld

[0050] 23: Second weld DETAILED DESCRIPTION

[0051] Next, a reproducing method of a joint structure using a frame according to the present invention will be described in detail with reference to the accompanying drawings.

[0052] Figure 1 is a sequence diagram illustrating a regeneration method using a joint structure of a frame according to the present invention, Figure 2 is a sequence diagram illustrating the specific sequence of the rough cutting steps according to the present invention, Figure 3 is a sequence diagram illustrating the specific sequence of the joining steps according to the present invention. Figure 4 is a sequence diagram illustrating the specific sequence of the grinding steps according to the present invention, Figure 5 is a sequence diagram illustrating the specific sequence of the acceptance steps according to the present invention, Figure 6 is a cross-sectional view illustrating a mask frame in contact with a sheet-like component according to the present invention, Figure 7 is a conceptual diagram illustrating a weld according to the present invention. Figure 8 is a cross-sectional view illustrating a welding state based on a weld according to the present invention, Fig. 9 The images are taken of the welding points and the mask surface of the sheet component by welding according to the present invention.

[0053] like Figures 1 to 9 As shown, the present invention relates to a method for regenerating a joint structure of a frame, and more particularly to a method for regenerating a joint structure of a frame that is judged to be defective and discarded due to thickness loss, thereby replenishing the thickness of the frame when processing a frame that needs to be precisely designed and manufactured according to specifications, shapes, and materials, such as a mask frame, so that discarded costs and resources can be effectively used through reuse and recycling.

[0054] To this end, the present invention includes a classification step S10, a material preparation step S20, a rough cutting step S30, a bonding step S40 and a grinding step S50 in order to classify defective mask frames and reuse the mask frames joined to the deposition mask according to the specifications of the display panel.

[0055] In the classification step S10 , products that do not reach the designed thickness of the mask frame 10 are classified.

[0056] In the material preparation step S20 , a sheet material 20 is prepared which is cut into an area relatively larger than the specification and size of the mask frame 10 classified in the classification step S10 and has a thickness greater than the required thickness of the display panel.

[0057] In the rough cutting step S30 , surfaces of the mask frame 10 and the sheet material 20 that are sorted in the sorting step S10 and the material preparing step S20 , which are in close contact with each other, are processed.

[0058] In the bonding step S40 , the sheet material 20 flattened in the rough cutting step S30 is placed on the upper side of the mask frame 10 and bonded by welding.

[0059] In the grinding step S50 , the sheet material 20 welded to the mask frame 10 in the bonding step S40 is ground according to the required thickness of the display panel.

[0060] As described above, the present invention can reprocess the mask frame 10 whose thickness is less than the required specification of the display panel and the substandard product with the required thickness of the design, thereby reusing the frame that needs to be discarded.

[0061] Thereby, the cost generated by the raw material of the mask frame 10 can be saved, and the raw material can be reused in advance by reusing the products that need to be discarded.

[0062] Next, each of the steps described above will be described in detail.

[0063] First, in the classification step S10 , the thickness of the mask frame 10 is measured to classify the products that do not meet the standards.

[0064] In the classification step S10 described above, the mask frames 10 having a thickness less than the design required thickness of the display panel are classified among the defective parts and the parts to be discarded.

[0065] As described above, in the classification step S10 , the mask frames 10 that need to be discarded due to poor thickness in the display panel specifications and design are classified separately.

[0066] At this time, it is preferable to measure the thickness of each classification of the mask frame 10 .

[0067] Next, in the material preparation step S20 , the sheet material 20 to be bonded to the mask frame 10 is prepared.

[0068] The sheet material 20 as described above is made of the same material as the mask frame 10 , and its length, width, and height are adjusted and manufactured according to the area, specification, and shape of the mask frame 10 .

[0069] The sheet material 20 is formed in such a manner that it is closely attached to one of the upper, lower, left and right surfaces according to the strip shape of the mask frame 10 .

[0070] At this time, the thickness of the sheet material 20 is relatively greater than the required thickness of the mask frame 10 .

[0071] The sheet material 20 described above is formed after confirming the specification and design thickness of the display panel so that the design specification of the display panel can be achieved after the mask frame 10 and the sheet material 20 are bonded.

[0072] That is, when the required thickness of the display panel is 30T and the thickness of the mask frame 10 is 29T, the sheet material 20 is formed to have a thickness of 1T or more by welding and grinding, where 1T=1 millimeter (mm).

[0073] After the sheet material 20 is welded and ground through the joining step S40 and the grinding step S50 , the sheet material 20 includes an additional thickness that can meet the required thickness of the display panel.

[0074] Therefore, when the mask frame 10 needs an additional thickness of 1T, it is preferable that the sheet material 20 has an additional thickness of about 1.5T to 3T which is greater than 1T.

[0075] In addition, the length and width of the sheet material 20 are equal to or greater than the area of ​​the mask frame 10 .

[0076] That is, the sheet material 20 is configured to have the same or relatively large areas depending on the length and width of each surface.

[0077] Therefore, when welding the sheet material 20 and the mask frame 10 , it is better to provide an extra space to prevent the edge portion from warping due to thermal deformation, or to prevent it from warping by precision welding with the same area as the mask frame 10 .

[0078] In the material preparation step S20 , the mask frame 10 is formed with the same material as the mask frame 10 in a manner that can complement the thickness, taking into consideration the specifications and shape of the mask frame 10 and the specifications and shape of the display panel.

[0079] Next, the rough cutting step S30 includes a flattening step S31 for flattening each surface in a manner that allows the sheet material 20 to be easily attached, and a first cleaning step S34.

[0080] In the planarization step S31 , the upper side of the mask frame 10 and the upper and lower sides of the sheet material 20 are planarized.

[0081] That is, in the planarization step S31 , each surface is planarized so that the mask frame 10 and the sheet material 20 can be easily attached to each other and warping and gaps are prevented, thereby maintaining a horizontal state.

[0082] In the first cleaning step S34 , foreign matter is removed by washing the surfaces of the mask frame 10 and the sheet material 20 .

[0083] Therefore, the first cleaning step S34 is performed in the order of high pressure cleaning, immersion cleaning, sterilization, high pressure cleaning, immersion cleaning, deionized water (DI) cleaning, air cleaning, isopropyl alcohol (IPA) cleaning and drying.

[0084] During high-pressure cleaning, foreign matter is removed by spraying high-pressure water onto the surface.

[0085] In the case of immersion cleaning, the adsorbed and remaining foreign matter is removed by immersing the container in a cleaning solution composed of a mixture of approximately 95% water and approximately 5% detergent.

[0086] During the disinfection process, residual oil and fat components are removed by spraying or immersing with a liquid or powder using a surfactant.

[0087] When cleaning with deionized water (DI), it is performed in the same manner as general deionized water, thereby removing small particles of impurities.

[0088] During air cleaning, water and other substances remaining in the cleaning and processing steps are removed by spraying high-pressure gas.

[0089] In the case of isopropyl alcohol (IPA) cleaning, the surface is cleaned by mixing isopropyl alcohol into water or spraying it alone.

[0090] During drying, the remaining liquid is removed by spraying high-temperature air or the like.

[0091] As described above, in the first cleaning step S34, foreign matter, grease components, impurities, etc. remaining in the mask frame 10 and the sheet material 20 are removed by sequentially or alternately executing the methods described in the above content, thereby ensuring precise bonding to the mask frame 10 and thereby preventing various problems such as warping and gaps caused by foreign matter, etc. from occurring in the joining step S40 and the grinding step S50.

[0092] In addition, a groove processing step S32 and a protrusion processing step S33 are included, so that the surfaces flattened by the flattening processing step S31 are precisely fixed by being embedded and bonded with each other.

[0093] In the groove processing step S32 , the placement groove 11 is processed along the length direction on the upper side of the mask frame 10 .

[0094] In the groove processing step S32 described above, the placement groove 11 is formed with a certain depth and width along the length direction of each surface of the mask frame 10 by a milling cutter device or the like on the upper side of the mask frame 10 to which the sheet material 20 is closely attached.

[0095] At this time, the thickness and depth of the placement groove 11 can be adjusted according to the specifications of the upper side of the mask frame 10, and can be formed as one or multiple at a certain interval.

[0096] In the protrusion processing step S33 , the two side portions of the lower side of the sheet material 20 are processed to form the placement protrusions 21 corresponding to the placement grooves 11 .

[0097] That is, in the protrusion processing step S33 , the two side portions of the lower side surface of the sheet material 20 are cut by a milling cutter device and a grinding device, so as to process the placement protrusion 21 corresponding to the placement groove 11 .

[0098] It is preferred that the placement protrusions 21 are configured to be compatible with the placement grooves 11 in accordance with their specifications and shapes.

[0099] At the same time, the thickness of the sheet material 20 is adapted to the insufficient thickness of the mask frame 10 and is formed with a sufficient thickness taking into account the thickness of the mounting projections 21 .

[0100] In addition, a plurality of the seating grooves 11 and the seating protrusions 21 are formed according to the areas of the mask frame 10 and the sheet material 20 .

[0101] That is, Figure 6As shown in (a) of FIG. 1 , the mask frame 10 and the sheet material 20 may be flattened and then placed in close contact with each other and welded.

[0102] In addition, if Figure 6 As shown in (b) in the figure, the mask frame 10 and the sheet material 20 can be welded after processing the mounting groove 11 and the mounting protrusion 21 which are combined with each other and embedding and combining them so as to be stably adhered and fixed.

[0103] Finally, if Figure 6 As shown in (c) in the figure, a plurality of mutually coupled mounting grooves 11 and mounting protrusions 21 can be processed on the mask frame and the sheet material at a certain interval and embedded and coupled so as to be stably adhered and fixed before welding.

[0104] As described above, the mounting groove 11 and the mounting protrusion 21 can be flattened by taking into account the area and width of the mask frame 10 and the sheet material 20, or can be welded after being stably fixed by forming one or more mounting grooves 11 and the mounting protrusion 21.

[0105] Furthermore, all surfaces can be uniformly welded by forming a weld along the seating groove 11 .

[0106] Next, the bonding step S40 includes a configuration step S41 for bonding the sheet material 20 to the upper side of the mask frame 10 and a welding step S42 .

[0107] In the configuration step S41 , the sheet material 20 is configured on the upper side of the mask frame 10 in a stable and close manner through the placement groove 11 and the placement protrusion 21 .

[0108] In the arrangement step S41 as described above, the strip-shaped sheet material 20 manufactured according to the upper side surfaces of the mask frame 10 in the shape of a quadrilateral frame is arranged on four surfaces respectively.

[0109] At the same time, the sheet material 20 is preferably arranged in a strip shape on each surface, and can be manufactured and arranged according to the frame shape of the mask frame 10 .

[0110] At the same time, it is preferable that the sheet material 20 is arranged to cover the entire surface according to the frame shape of the mask frame 10 .

[0111] Therefore, the seating protrusion 21 protruding toward the lower end of the sheet material 20 can be inserted into the seating groove 11, thereby preventing the sheet material 20 from being separated, lifted, and having a gap and stably arranged.

[0112] In the welding step S42 , the mask frame 10 and the sheet material 20 are welded.

[0113] In the welding step S42 described above, the mask frame 10 and the sheet material 20 are made of the same material, and thus are welded by one of a plurality of welding methods that can realize welding of the materials themselves.

[0114] Therefore, in the welding step S42, it is better to select a laser welding method that can easily achieve self-material welding.

[0115] Thus, in the welding step S42 , the sheet material 20 and the mask frame 10 are joined along the first weld 22 and the second weld 23 on the upper side of the sheet material 20 by laser welding of the material itself.

[0116] The first welding seam 22 is used to weld two side surfaces of the placement groove 11 of the mask frame 10 .

[0117] The second weld 23 is welded to the inner edge of the mask frame 10 .

[0118] That is, the first weld 22 is formed on the inner side of the sheet material 20 along the length direction according to the width of the seating groove 11 , and the second weld 23 is formed along the edge of the sheet material 20 .

[0119] Therefore, when the sheet material 20 is welded to the mask frame 10 , warping and gaps can be prevented from occurring, and a gap can be prevented from occurring at the end where the sheet material 20 and the mask frame 10 are in close contact.

[0120] In addition, when welding is performed along the first weld 22 and the second weld 23, when the mask frame 10 and the sheet material 20 are made of Invar 36 material, the defocusing of the laser welding method can be performed under the condition of approximately 30 millimeters (mm), so that the weld spot size of the welding shape is less than 4 mm.

[0121] This is because, when a weld spot size of more than 4 mm is formed due to a deeper laser focus setting, the heat will be transferred to a deeper position of the mask frame 10 on the heat conduction surface and deformed, thereby forming multiple pores and welding marks on the welding part due to the higher output, making it difficult to achieve precision processing.

[0122] Therefore, if Figure 8 As shown, when the first weld 22 and the second weld 23 are performed under the conditions described in the above content, the welding state is observed and it can be found that when the welding spot is within 3mm, the measured welding depth is approximately 5mm, and a welding spot of approximately 1.9mm to 2.3mm will be formed on the surface where the sheet material 20 contacts the mask frame 10.

[0123] At this time, the width and number of the placement grooves 11 can be adjusted so that the welds formed by the first weld 22 and the second weld 23 overlap by about 0.5 mm, thereby joining a wider area and preventing warping and gaps.

[0124] In addition, the second weld 23 is formed along the edge of the sheet material 20. By forming the same welding spot as the first weld 22, the exposed portion of the surface where the sheet material 20 contacts the mask frame 10 can be welded, thereby preventing the formation of a gap.

[0125] Thus, the first weld 22 and the second weld 23 are welded by the materials themselves under the conditions described above, thereby preventing the sheet material 20 and the mask frame 10 from being deformed and easily joining them.

[0126] Next, the grinding step S50 includes a cutting step S51, a middle cutting step S52 and a finishing cutting step S53 for cleaning the surface by grinding the upper side and the side of the sheet material 20 forming the solder joint and processing according to the thickness of the display panel.

[0127] In the cutting step S51 , the welding spots formed on the mask frame 10 and the sheet material 20 in the welding step S42 are removed.

[0128] Therefore, in the cutting step S51 , the welding spots formed on the upper part and the side surface of the sheet material 20 are removed by grinding and cutting.

[0129] At this time, in the cutting step S51 , in order to remove the welding points while maintaining the thickness of the sheet material 20 and thereby maintain the thickness of the mask frame 10 , the welding parts are processed until a thickness of about 0.5 mm remains.

[0130] In the intermediate cutting process step S52 , the thickness of the mask frame 10 and the sheet material 20 after the solder joints are removed in the cutting process step S51 are ground according to the specification and flatness of the display panel.

[0131] In the above-mentioned cutting process step S52 , the upper surface of the sheet material 20 is ground and cut so that the thickness of the mask frame 10 and the sheet material 20 meets the required thickness of the display panel.

[0132] At this time, in the intermediate cutting process step S52 , when the display panel requires a thickness of about 30T, the thickness of the mask frame 10 and the sheet material 20 has a tolerance of about (30±0.1)T, and a flatness of about 0.05mm can be maintained.

[0133] In the finishing cutting process step S53 , processing and finishing of grooves and recesses are performed on the mask frame 10 processed according to thickness in the intermediate cutting process step S52 .

[0134] In the finishing step S53, the required grooves and recesses are processed according to the specifications of the display panel, and finishing operations such as chamfering are performed.

[0135] That is, it is preferable that the finishing cutting step S53 is performed in the same manner as a general finishing operation of the mask frame 10 .

[0136] As described above, through the grinding step S50 , the solder joints formed during welding in the mask frame 10 joined with the sheet material 20 are removed and processed according to thickness and flatness, and then the finishing operation is performed to perform precision processing according to the required conditions of the display panel.

[0137] In addition, the process further includes an acceptance step S60 of performing acceptance on the mask frame 10 after being ground in the grinding step S50 .

[0138] The acceptance step S60 as described above includes a measurement step S61 for damage-free transportation after confirming the thickness processed by the grinding step S50 according to the required conditions of the display panel and removing foreign matter, a second cleaning step S62 and a packaging step S63.

[0139] In the measuring step S61 , the thickness, flatness and tolerance of the mask frame 10 manufactured by the grinding step S50 are measured, so that substandard products and normal products are classified according to the required thickness of the display panel.

[0140] That is, in the measuring step S61 , the thickness and flatness of the mask frame 10 are measured within a general range, so that the mask frame 10 to which the sheet material 20 is bonded meets the required thickness of the display panel and is classified.

[0141] Therefore, through the measuring step S61, normal products are transferred to the next process, and substandard products due to poor welding, thickness and flatness are separately classified.

[0142] At this time, for the classified substandard products, additional processes are performed after determining whether they can be reused according to the processes described in the above content.

[0143] In the second cleaning step S62 , foreign matter and dirt of the mask frame 10 classified as a normal product in the measuring step S61 are removed.

[0144] In the second cleaning step S62 as described above, the same method as the first cleaning step S34 is performed to remove foreign matter, grease components, impurities, etc. adsorbed on the mask frame 10 .

[0145] In the packaging step S63 , the mask frame 10 after the foreign matter is removed in the second cleaning step S62 is packaged.

[0146] That is, in the packaging step S63, the mask frame 10 is packaged by using a box, plastic, or polystyrene foam, so as to prevent damage and destruction during transportation of the mask frame 10, block external contamination, and facilitate transportation.

[0147] Therefore, in the packaging step S63 , the same packaging method as that used in the general unloading and transportation of the mask frame 10 is used to facilitate transportation to the display panel process.

[0148] Next, after the sheet material 20 according to the present invention is bonded to the mask frame 10 , the following steps are performed to grind the thickness and flatness.

[0149] First, the mask frames 10 whose thickness does not meet the specification of the display panel are classified through the classification step S10.

[0150] According to the mask frames 10 classified by the classification step S10 as described above, the sheet material 20 required on the mask frame 10 is prepared by the material preparation step S20 .

[0151] At this time, in the material preparation step S20 , after the thickness and specifications of the mask frame 10 are measured, the sheet material 20 is prepared accordingly.

[0152] The area of ​​the sheet material 20 is equal to or larger than that of the mask frame 10 , and the total thickness of the mask frame 10 and the sheet material is greater than the required thickness of the display panel.

[0153] That is, the sheet material 20 and the mask frame 10 may have the same length and width, or may protrude by about 0.5 mm.

[0154] In addition, the thickness of the sheet material 20 can be flexibly changed according to the required thickness of the mask frame 10 and the display panel, and can be formed with a thickness of about 2T. The placement protrusion 21 is processed through the rough cutting step S30, and the thickness of the mask frame 10 is made greater than the thickness of the display panel.

[0155] Meanwhile, the mask frame 10 is usually made of Invar 36 material, and may also be made of stainless steel (SUS) 420, etc. It is preferred that the sheet material 20 is made of the same material as the mask frame 10 .

[0156] In addition, after the sheet material 20 is prepared in the material preparation step S20 , the placement groove 11 and the placement protrusion 21 are processed in the rough cutting step S30 , so that the sheet material 20 can be easily placed on the upper side of the mask frame 10 .

[0157] Therefore, in the rough cutting step S30, the surface where the mask frame 10 and the sheet material 20 meet is flattened through the flattening processing step S31, so that there is no warping and gap and they are precisely attached, and then the recess processing step S32 and the protrusion processing step S33 are used to process the mutually combined placement groove 11 and the placement protrusion 21.

[0158] In addition, the first cleaning step S34 removes foreign matter and grease components caused by the processing and materials of the mask frame 10 and the sheet material 20 .

[0159] Thus, in the rough cutting step S30, the mask frame 10 and the sheet material 20 can be easily combined and prevented from falling off, shaking and twisting due to external force, so that the bonding step can be conveniently performed and the bonding can be easily completed by preventing warping and gaps.

[0160] In addition, the mask frame 10 and the sheet material 20 processed in the rough cutting step S30 are bonded in the bonding step S40 .

[0161] At this time, in the joining step S40 , various welding methods that can join the mask frame 10 and the sheet material 20 made of the same material are used, among which a self-material welding method for welding the same material is preferably used.

[0162] Therefore, after the sheet material 20 is arranged on the mask frame 10 through the arrangement step S41 , welding is performed through the welding step S42 .

[0163] In the joining step S40 described above, laser welding, which is a typical self-material welding method, is used, and welding is performed along the first weld seam 22 and the second weld seam 23 so that the mask frame and the sheet material can be easily joined by laser welding.

[0164] The first weld 22 is formed along the length direction according to the interval between the inner sides of the accommodating groove 11 , and the second weld 23 is formed along the edge of the sheet material 20 or the mask frame 10 .

[0165] At this time, the first weld 22 and the second weld 23 can adjust the size of the weld point generated when welding the own materials, so that the welding surfaces of the mask frame 10 and the sheet material 20 in contact overlap with each other, thereby preventing the occurrence of warping and gaps.

[0166] As an example as described above, when the thickness of the sheet material 20 is 2T, the sheet material 20 and the mask frame 10 are welded by their own materials.

[0167] When welding the material itself, defocus is adjusted as a welding condition so that the size of the weld spot is maintained within about 3 mm and the depth is about 3 to 5 mm.

[0168] In addition, when the mask frame 10 and the sheet material 20 are ground by welding the materials themselves according to the characteristics of the materials, defects such as pores, discoloration, and bubbles caused by the heat during welding can be prevented.

[0169] Therefore, by using the material itself to weld while maintaining a certain power, the sheet material 20 can be melted and welded to the mask frame 10 , and the welded surfaces can be overlapped with each other through the welding points to prevent warping.

[0170] In addition, the first weld 22 welds the surface where the seating groove 11 and the seating protrusion 21 meet, and the second weld 23 welds the mask frame 10 and the side portions of the sheet material 20 that meet, thereby preventing a gap from being formed.

[0171] Thus, in the joining step S40 , welding joining can be conveniently performed after the sheet material 20 is stably fixed to the mask frame 10 .

[0172] In addition, after the mask frame 10 and the sheet material 20 are bonded together in the bonding step S40 , the sheet material 20 is ground in the grinding step S50 according to the required thickness of the display panel.

[0173] Therefore, the grinding step S50 removes the solder joints formed during welding through the cutting step S51, the intermediate cutting step S52 and the fine cutting step S53, and after processing the sheet material 20 according to the required thickness of the display panel, performs the processing required by the design such as grooves and recesses according to the display panel.

[0174] Thus, in the grinding step S50 , thickness adjustment, finishing and other required processing are sequentially performed according to the required thickness and design of the display panel.

[0175] In addition, through the acceptance step S60 , the mask frame 10 manufactured through the various steps is sequentially subjected to the measurement step S61 , the second cleaning step S62 , and the packaging step S63 .

[0176] In the measuring step S61 , after the thickness of the mask frame 10 is precisely measured for inspection, foreign matter and the like are removed through the second cleaning step S62 .

[0177] Next, packaging is performed through the packaging step S63 to prevent damage and breakage during transportation and to facilitate transportation.

[0178] As described above, the present invention can reuse the mask frame 10 that is discarded because of incorrect processing of the mask frame 10 and design changes of the display panel and cannot meet the thickness requirements, thereby saving the costs incurred during the discarding and selling process.

[0179] Furthermore, the thickness of the sheet material 20 can be adjusted after being bonded to the mask frame 10 , thereby flexibly coping with erroneous processing and design changes.

[0180] At the same time, since the mask frame 10 is made of expensive materials, waste materials can be reduced and resources can be used effectively, thereby ensuring utilization and economy.

[0181] Furthermore, the sheet material 20 can be joined while being precisely and firmly fixed to the mask frame 10 , thereby preventing defects due to distortion during welding and preventing warping and gaps between materials after welding.

[0182] In addition, deformation of the material caused by welding can be prevented, and bubbles, pores, and discoloration that occur during welding can be prevented, thereby maintaining excellent quality.

[0183] As described above, the rights of the present invention are not limited to the embodiments described in the above content, but should be defined through the records of the claims. Those skilled in the art can make various modifications and improvements to the present invention within the scope of the rights recorded in the claims.

Claims

1. A regeneration method using a joint structure of a frame, characterized in that: A method for regenerating a mask frame (10) bonded to a deposition mask and capable of reusing the frame according to the specification of a display panel using a bonding structure of the frame comprises: a classification step (S10), classifying products that do not reach the designed thickness of the mask frame (10); a material preparation step (S20), preparing a sheet material (20) cut into an area relatively larger than the specifications and size of the mask frame (10) classified in the classification step (S10), and having a thickness greater than the required thickness of the display panel; A rough cutting step (S30) of processing the surfaces of the mask frame (10) and the sheet material (20) that are precisely in close contact with each other and are classified in the classification step (S10) and the material preparation step (S20); a joining step (S40), placing the sheet material (20) flattened by the rough cutting step (S30) on the upper side of the mask frame (10) and joining the sheet material (20) by welding; and A grinding step (S50) is performed to grind the sheet material (20) welded to the mask frame (10) in the bonding step (S40) according to the required thickness of the display panel.

2. The method for regenerating a joint structure using a frame according to claim 1, characterized in that: The rough cutting step (S30) comprises: a planarization processing step (S31), planarizing the upper side of the mask frame (10) and the upper side and lower side of the sheet material (20); and The first cleaning step (S34) is to remove foreign matter by washing the surfaces of the mask frame (10) and the sheet material (20).

3. The method for regenerating a joint structure using a frame according to claim 2, characterized in that: The rough cutting step (S30) further comprises: The groove processing step (S32) and the protrusion processing step (S33) enable the surfaces flattened by the flattening processing step (S31) to be precisely fixed by embedding and bonding with each other; In the groove processing step (S32), a placement groove (11) is processed along the length direction on the upper side surface of the mask frame (10). In the protrusion processing step (S33), the two side portions of the lower side of the sheet material (20) are processed to form a placement protrusion (21) corresponding to the placement groove (11).

4. The method for regenerating a joint structure using a frame according to claim 1, characterized in that: The joining step (S40) includes: a configuration step (S41), configuring the sheet material (20) to the upper side of the mask frame (10) through the configuration groove (11) and the configuration protrusion (21) in a stable and close manner; and A welding step (S42) is performed to weld the mask frame (10) and the sheet material (20).

5. The method for regenerating a joint structure using a frame according to claim 4, characterized in that: The welding step (S42) includes: A first weld (22) is used to weld the mask frame (10) and two side surfaces of the placement groove (11); and The second weld (23) is used to weld the inner side portion of the edge of the mask frame (10).

6. The method for regenerating a joint structure using a frame according to claim 1, characterized in that: The grinding step (S50) comprises: a cutting step (S51) of removing welding spots formed on the mask frame (10) and the sheet material (20) in the welding step (S42); a cutting processing step (S52), grinding the thickness of the mask frame (10) and the sheet material (20) after the solder joints are removed in the cutting step (S51) according to the specification and flatness of the display panel; and The finishing cutting process step (S53) performs processing of grooves, recesses and holes, flatness tolerance and chamfering on the mask frame (10) processed according to thickness in the intermediate cutting process step (S52).

7. The method for regenerating a joint structure using a frame according to claim 1, characterized in that: Also includes: An acceptance step (S60) of performing acceptance on the mask frame (10) after being ground in the grinding step (S50); The acceptance step (S60) includes: a measuring step (S61) of measuring the thickness, flatness and tolerance of the mask frame (10) manufactured by the grinding step (S50), so as to classify substandard products and normal products; a second cleaning step (S62) of removing foreign matter and dirt from the mask frame (10) classified as a normal product in the measuring step (S61); and A packaging step (S63) is performed to package the mask frame (10) after foreign matter is removed in the second cleaning step (S62).

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