CN115707637A - Apparatus and method for making thin glass sheets - Google Patents
Apparatus and method for making thin glass sheets Download PDFInfo
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- CN115707637A CN115707637A CN202210906498.2A CN202210906498A CN115707637A CN 115707637 A CN115707637 A CN 115707637A CN 202210906498 A CN202210906498 A CN 202210906498A CN 115707637 A CN115707637 A CN 115707637A
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Abstract
An apparatus and method for manufacturing a thin glass sheet includes a barrel filled with wax and a gripper unit configured to: the method includes the steps of holding a plurality of thin glass sheets to be spaced apart from each other at a preset interval, moving the plurality of thin glass sheets downward into wax stored in the barrel so as to apply the wax onto surfaces of the plurality of thin glass sheets, moving the plurality of thin glass sheets upward, and then unloading the plurality of thin glass sheets into a cassette, with the result that uneven application caused by a process of maintaining a wax discharge pressure and adjusting a temperature can be prevented, and viscosity of the wax can be maintained to apply the wax uniformly and ensure uniformity of an applied thickness, thereby improving processing accuracy.
Description
Technical Field
The present disclosure relates to an apparatus and method for manufacturing a thin glass sheet, and more particularly to an apparatus and method for manufacturing a thin glass sheet in the following manner: the plurality of thin glass sheets are held to be spaced apart from each other at a predetermined interval using a gripper, are moved down into a barrel filled with wax to a preset depth so that the wax is applied onto surfaces of the plurality of thin glass sheets, and then the plurality of thin glass sheets coated with the wax are unloaded into a cassette, and as a result, uneven application caused by a process of maintaining a wax discharge pressure and adjusting a temperature of the wax can be prevented, and viscosity of the wax can be maintained to apply the wax evenly and ensure uniformity of an applied thickness, thereby improving processing accuracy.
Background
Recently, various technologies related to flexible bodies that can be applied to smart phones, tablet PCs, other portable electronic devices, and the like have been developed. Applications of the flexible body are expected to extend not only to portable electronic devices but also to vehicles, home appliances, other various products, and the like.
Glass that can protect the body or serve as an interface needs to be made flexible to constitute a flexible body. The flexible thin glass sheet may be provided by manufacturing flexible glass having a small thickness so that the flexible glass may be easily folded or deformed into a curved shape.
Meanwhile, since the flexible thin glass sheet has a very small glass thickness, the flexible thin glass sheet is likely to be damaged and deformed during the manufacturing process, which results in product defects. For this reason, since the flexible thin glass sheet having a thin structure needs to be handled more carefully to prevent damage, the time required for the manufacturing process increases, and the production cost increases.
The thin glass sheet needs to be cut or the edge of the thin glass sheet needs to be processed so that the thin glass sheet is used for various products. It is known that edge treatment, C-angle treatment, etc. can be performed as a physical polishing method of a thin glass sheet. However, since a thin glass sheet having a thickness of 0.15mm or less is difficult to handle by using these methods, it is necessary to stack and use a plurality of glass sheets.
In order to stack a plurality of thin glass sheets as described above, the plurality of thin glass sheets may be stacked after wax is applied onto surfaces thereof to prevent mutual pushing, impact, scratching, and the like.
In the related art, the process of applying wax, which is performed before the process of stacking the thin glass sheets, is performed by applying wax onto the surface of the thin glass sheets by discharging the wax through a slit, a nozzle, or the like. In this case, the thickness uniformity of the applied wax cannot be ensured, which may cause a problem of bubbles occurring between the thin glass sheets during the process of stacking the thin glass sheets. The bubbles cause a problem that the thin glass sheet warps and the processing accuracy becomes poor.
During the process of applying the wax, it is difficult to maintain a constant discharge pressure of the wax, and it is impossible to apply a uniform amount of the wax because the discharge amount of the wax varies according to the temperature.
Disclosure of Invention
An object of the present invention is to provide an apparatus and method for manufacturing a thin glass sheet, in which a plurality of thin glass sheets are held to be spaced apart from each other at a predetermined interval using a gripper, the plurality of thin glass sheets are moved down into a barrel filled with wax to a preset depth so that wax is applied onto surfaces of the plurality of thin glass sheets, and then the plurality of thin glass sheets coated with wax are unloaded into a cassette, and as a result, uneven application caused by a process of maintaining a wax discharge pressure and adjusting a temperature of the wax can be prevented, and viscosity of the wax can be maintained to apply the wax uniformly and ensure uniformity of an applied thickness, thereby improving processing accuracy.
Another object of the present disclosure is to provide an apparatus and method for manufacturing a thin glass sheet, in which thin glass sheets having wax applied to the surfaces thereof are stacked in a zigzag manner and then joined by using a pressing operation, and as a result, a plurality of thin glass sheets having wax applied to the surfaces thereof can be efficiently stacked.
According to one aspect of the present disclosure, there is provided an apparatus for making a thin glass sheet, the apparatus comprising: a barrel filled with wax; and a gripper unit configured to hold a plurality of thin glass sheets spaced apart from each other at a preset interval, move the plurality of thin glass sheets downward into wax stored in the barrel so as to apply the wax onto surfaces of the plurality of thin glass sheets, move the plurality of thin glass sheets upward, and then unload the plurality of thin glass sheets into a cassette.
In an apparatus for manufacturing a thin glass sheet according to aspects of the present disclosure, the gripper unit may include: a gripper configured to secure upper ends of the plurality of thin glass sheets; and a transfer device configured to transfer the gripper.
In the apparatus for manufacturing a thin glass sheet according to an aspect of the present disclosure, the gripper unit may move the plurality of thin glass sheets downward such that the plurality of thin glass sheets are immersed in the wax to a position relatively lower than a position where upper ends of the plurality of thin glass sheets are fixed.
In the apparatus for manufacturing a thin glass sheet according to aspects of the present disclosure, the temperature of the barrel may be adjusted to a temperature range of 150 to 250 ℃.
In an apparatus for manufacturing a thin glass sheet according to aspects of the present disclosure, the wax may be applied in a thickness range of 20 to 40 μm.
An apparatus for making a thin glass sheet according to aspects of the present disclosure may further comprise: a loading unit configured to unload the plurality of thin glass sheets loaded in the cassette and to position the plurality of thin glass sheets on a heating stage; an alignment unit provided at two opposite X-axis sides and two opposite Y-axis sides of the heating stage and configured to align the plurality of thin glass sheets along X-axis and Y-axis; and a pressing unit configured to perform a pressing operation on the plurality of thin glass sheets aligned by the aligning unit.
In the apparatus for manufacturing a thin glass sheet according to aspects of the present disclosure, the loading unit may transfer a plurality of thin glass sheets loaded in a zigzag manner onto the upper surface of the loading fork.
In an apparatus for manufacturing a thin glass sheet according to aspects of the present disclosure, the alignment unit may include: an X-axis aligner disposed on two opposite X-axis sides of the heating stage and configured to be movable along the X-axis; and Y-axis aligners disposed on two opposite Y-axis sides of the heating stage and configured to be movable along the Y-axis.
In an apparatus for manufacturing a thin glass sheet according to aspects of the present disclosure, the heating stage may be maintained within a temperature range of 200 to 250 ℃.
According to another aspect of the present disclosure, there is provided a method of making a thin glass sheet, the method comprising the steps of: maintaining a plurality of thin glass sheets spaced apart from each other at a preset interval by a gripper under the control of a transfer device; moving the plurality of thin glass sheets held by the grippers to a position above a barrel filled with wax under control of the transfer device; moving the gripper downwardly from the upper side to the lower side of the barrel by the transfer device and dipping the plurality of thin glass sheets into the wax to apply the wax to a preset position; and moving the gripper upward to move the plurality of thin glass sheets to a position above the barrel and then unloading the plurality of thin glass sheets to a cassette when a preset application time elapses.
In a method of manufacturing a thin glass sheet according to another aspect of the present disclosure, while applying the wax, the temperature of the barrel may be adjusted within a temperature range of 150 to 250 ℃ to maintain the viscosity of the wax.
In the method of manufacturing a thin glass sheet according to another aspect of the present disclosure, the wax may be applied on the surfaces of the plurality of thin glass sheets in a thickness range of 20 to 40 μm when the wax is applied.
The method of making a thin glass sheet according to another aspect of the present disclosure may further include the steps of: unloading the plurality of thin glass sheets loaded in the cassette by a loading unit and placing the plurality of thin glass sheets on an upper portion of a heating stage; aligning the plurality of thin glass sheets by using alignment units disposed at two opposite X-axis sides and two opposite Y-axis sides of the plurality of thin glass sheets; performing a pressing operation on the plurality of thin glass sheets by a pressing unit; and unloading the plurality of thin glass sheets having completed the pressing operation by the loading unit.
In the method of manufacturing a thin glass sheet according to another aspect of the present disclosure, the step of disposing a plurality of thin glass sheets on the upper portion of the heating stage may load the plurality of thin glass sheets on the upper surface of the loading fork of the loading unit in a zigzag manner.
In a method of making a thin glass sheet according to another aspect of the present disclosure, the heating stage may be maintained within a temperature range of 200 to 250 ℃.
Drawings
The above and other aspects, features and other advantages of the present disclosure will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:
fig. 1 and 2 are views illustrating an apparatus for manufacturing a thin glass sheet according to an embodiment of the present disclosure;
figure 3 is a view illustrating a gripper of an apparatus for making thin glass sheets according to an embodiment of the present disclosure;
fig. 4 to 6 are views for explaining a process of applying wax by using an apparatus for manufacturing a thin glass sheet according to an embodiment of the present disclosure;
fig. 7 is a view for explaining a state where the apparatus for manufacturing a thin glass sheet according to the embodiment of the present disclosure is used to load a thin glass sheet having wax applied to a surface thereof onto a loading unit; and
fig. 8 is a flowchart illustrating a process of manufacturing a thin glass sheet according to another embodiment of the present disclosure, in which wax is applied onto surfaces of a plurality of thin glass sheets, and then the plurality of thin glass sheets are stacked.
Detailed Description
Exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings.
Hereinafter, embodiments of an apparatus and a method for manufacturing a thin glass sheet according to the present disclosure will be described in detail with reference to the accompanying drawings.
However, it should be noted that the essential technical spirit of the present disclosure is not limited by the following exemplary embodiments, and those skilled in the art may easily replace or change the following exemplary embodiments based on the essential technical spirit of the present disclosure.
Furthermore, the terms used herein are selected for convenience of description, and should be appropriately interpreted as meanings conforming to the technical spirit of the present disclosure, not limited to dictionary meanings, when recognizing the essential technical spirit of the present disclosure.
Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.
Fig. 1 and 2 are views illustrating an apparatus for manufacturing a thin glass sheet according to an embodiment of the present disclosure, fig. 3 is a view illustrating a gripper of the apparatus for manufacturing a thin glass sheet according to an embodiment of the present disclosure, fig. 4 to 6 are views for explaining a process of applying wax by using the apparatus for manufacturing a thin glass sheet according to an embodiment of the present disclosure, and fig. 7 is a view for explaining a state in which the apparatus for manufacturing a thin glass sheet according to an embodiment of the present disclosure is used to load a thin glass sheet having wax applied to a surface thereof onto a loading unit.
Referring to fig. 1 to 7, an apparatus for manufacturing a thin glass sheet according to an embodiment of the present disclosure may include a barrel 100, a gripper unit 200, a cassette 300, a loading unit 400, an aligning unit 500, and a pressing unit 600.
In this case, two or more thin glass sheets 10 may be provided as the plurality of thin glass sheets 10, as needed. In the embodiments of the present disclosure, five thin glass sheets 10 will be described and illustrated.
When the barrel 100 is provided as described above, the plurality of thin glass sheets 10 may be moved downward by the gripper unit 200 and then dipped into the wax 20 in the barrel 100 so that the wax 20 may be applied onto the surfaces of the plurality of thin glass sheets 10. When the application of the wax is completed as the preset time passes, the plurality of thin glass sheets 10 may be moved upward by the gripper unit 200 and then unloaded to the outside of the barrel 100.
In this case, the application time for maintaining the plurality of thin glass sheets 10 in the wax 20 may be set to a time range of about 10 to 20 seconds.
A separate temperature maintaining means (e.g., a heating coil, etc.) may be provided in the tub 100, and the temperature of the tub 100 is adjusted to a temperature range of 150 to 250 ℃. This is because the thin glass sheet 10 can be coated with wax in a uniform thickness range of 20 to 40 μm even if the melting point of the wax 20 is about 47 to 64 ℃, and the denaturation rate (denaturation rate) of the wax 20 can be reduced because the viscosity of the wax 20 is low in a temperature range of 150 to 250 ℃.
In this case, in the temperature range of 150 ℃ or less, the viscosity of the wax 20 is high, which causes a problem that the thickness of the wax applied to the thin glass sheet 10 increases and the thin glass sheet 10 is damaged during the subsequent stacking process. In the temperature range of 250 c or more, there are problems in that the wax 20 stored in the barrel 100 is rapidly denatured, the viscosity of the denatured wax 20 is increased, and the thickness of the wax applied to the thin glass sheet 10 is increased.
The gripper unit 200 holds the plurality of thin glass sheets 10 spaced apart from each other at a preset interval, and moves (i.e., immerses) the plurality of thin glass sheets 10 downward into the wax 20 stored in the barrel 100, so that the wax 20 is applied onto the surfaces of the plurality of thin glass sheets 10. Thereafter, the gripper unit 200 moves the plurality of thin glass sheets 10 upward and unloads the plurality of thin glass sheets 10 to the cassette 300. The gripper unit 200 may include a transfer device 210, a gripper 220, and the like.
In this case, the transfer device 210 is used to transfer the gripper 220. For example, the transfer device 210 may include a transfer robot or the like. As shown in fig. 3, the transfer device 210 moves a plurality of thin glass sheets 10 to a position above the barrel 100, the plurality of thin glass sheets 10 being spaced apart from each other at a preset interval and held by the grippers 220. As shown in fig. 4, the transfer device 210 moves the gripper 220 downward from the upper side to the lower side of the barrel 100 and dips the plurality of thin glass sheets 10 into the wax 20, thereby applying the wax 20 to a preset position on the plurality of thin glass sheets 10.
Thereafter, when a preset application time (e.g., 10 to 20 seconds) has elapsed, the transfer device 210 may again move the grippers 220 upward and move the plurality of thin glass sheets 10 to the outside of the wax 20 (i.e., the upper side of the barrel 100). As shown in fig. 5, the transfer device 210 can move and unload a plurality of thin glass sheets 10 moved to the exterior of the barrel 100 to the cassette 300.
The clamper 220 is used to fix the upper ends of a plurality of thin glass sheets 10. The gripper 220 can secure a plurality of thin glass sheets 10 to its end. For example, a protective pad 221 made of silicone resin may be provided on the inner surface of the clamper 220 to prevent surface damage in advance that may occur when the thin glass sheet 10 is held (fixed).
For example, the upper ends of the plurality of thin glass sheets 10 are fixed under the control of the transfer device 210, and then the plurality of thin glass sheets 10 held (fixed) to the grippers 220 can be moved to the upper side of the barrel 100 by the transfer device 210.
Further, under the control of the transfer device 210, the gripper 220 moves down into the barrel 100 in a state where the plurality of thin glass sheets 10 are held (fixed) by the gripper 220, so that the plurality of thin glass sheets 10 can be dipped into the wax 20, so that the wax 20 is applied onto the surfaces of the plurality of thin glass sheets 10.
The gripper unit 200 may move the plurality of thin glass sheets 10 downward such that the plurality of thin glass sheets 10 held by the grippers 220 are dipped in the wax 20 to a position relatively lower than a position where upper ends of the plurality of thin glass sheets 10 are fixed. This is to prevent wax 20 from being unnecessarily applied to the surface of the holder 220.
Thereafter, by moving the grippers 220 upward under the control of the transfer device 210, a plurality of thin glass sheets 10 may be moved upward to the upper side of the barrel 100, moved to the position of the cassette 300, and then loaded into the cassette 300. After loading the plurality of thin glass sheets 10, the grippers 220 can release the plurality of thin glass sheets 10 and return to the original position under the control of the transfer device 210.
Meanwhile, the plurality of thin glass sheets 10, which are moved downward by the gripper unit 200 and dipped in the wax 20, are maintained for a preset application time (for example, 10 to 20 seconds) so that the wax 20 may be applied onto the surfaces of the plurality of thin glass sheets 10 in a thickness range of 20 to 40 μm.
In this case, the wax 20 is applied to prevent abrasion or damage caused by direct contact and friction between the plurality of thin glass sheets 10 in order to stack the plurality of thin glass sheets 10. The wax 20 needs to be applied in a sufficient thickness range. The wax 20 needs to be applied in a thickness range of 30 to 40 μm to obtain the desired effect. Therefore, the wax 20 needs to be applied to the surfaces (two opposite surfaces) of the plurality of thin glass sheets 10 in the thickness range of 20 to 40 μm.
The gripper unit 200 has been described as including a gripper 220, a protection pad 221, and the like. Of course, a configuration including a vacuum adsorption pad or the like may be applied to the gripper unit 200.
The cassette 300 loads a plurality of thin glass sheets 10 unloaded and moved from the barrel 100 by the gripper unit 200. The loaded plurality of thin glass sheets 10 may be horizontally loaded again to perform the stacking operation.
In the case where the plurality of thin glass sheets 10 are asymmetrically arranged in the upward/downward direction and the leftward/rightward direction, it is difficult to load the plurality of thin glass sheets 10 in a zigzag manner. Therefore, in the cartridge 300, wax may be additionally applied to the portion that has been held by the gripper unit 200. The portion of the tub 100 to which the wax 20 has not been applied may be coated at least twice with the wax by using a wax application apparatus.
The loading unit 400 unloads the plurality of thin glass sheets 10 loaded in the cassette 300 and places the plurality of thin glass sheets 10 on the heating stage 30. The loading unit 400 may load a preset number (e.g., twenty or more) of thin glass sheets 10 that have been coated with wax onto the upper surface of the loading forks 410 of the loading unit 400, and then place a plurality of thin glass sheets 10 on the upper surface of the heating stage 30.
For example, a configuration in which five thin glass sheets 10 are provided as the plurality of thin glass sheets 10 will be described. The first thin glass sheet 11 may be loaded onto the upper surface of the loading fork 410 such that the portion coated with the first wax 21 is positioned in the right direction and the upper end held by the gripper unit 200 is positioned in the left direction. The second thin glass sheet 12 may be loaded onto the upper surface of the loading fork 410 such that the portion coated with the second wax 22 is positioned in the leftward direction and the upper end held by the gripper unit 200 is positioned in the rightward direction. A third thin glass sheet 13 may be loaded in the same direction as the first thin glass sheet 11, a fourth thin glass sheet 14 may be loaded in the same direction as the second thin glass sheet 12, and a fifth thin glass sheet 15 may be loaded in the same direction as the third thin glass sheet 13. Thus, five thin glass sheets may be loaded onto the upper surface of the loading forks 410.
In this case, the heating stage 30 may be provided in the form of a flat plate, and a temperature range of 200 to 250 ℃ is adjusted and maintained. The upper portion of the heating stage 30 has two receiving grooves 31 for receiving the loading forks 410. Therefore, when the plurality of thin glass sheets 10 are placed on the upper surface of the heating stage 30 by using the loading forks 410, the loading forks 410 are accommodated in the accommodating grooves 31, so that the plurality of thin glass sheets 10 can be stably placed on the upper surface of the heating stage 30.
Thereafter, when the operation of aligning the plurality of thin glass sheets 10 by using the aligning unit 500 and the operation of joining the plurality of thin glass sheets 10 by using the pressing unit 600 are completed, the loading unit 400 may move upward again and unload the plurality of thin glass sheets 10 by using the loading forks 410.
The alignment unit 500 is used to align the thin glass sheet 10 along the X-axis and the Y-axis at two opposite X-axis sides and two opposite Y-axis sides of the heating stage 30. The alignment unit 500 may include: an X-axis aligner 510 and a Y-axis aligner 520, the X-axis aligner 510 being disposed on two opposite X-axis sides of the heating stage 30 and configured to be movable along the X-axis, and the Y-axis aligner 520 being disposed on two opposite Y-axis sides of the heating stage 30 and configured to be movable along the Y-axis.
Therefore, when the plurality of thin glass sheets 10 are placed on the heating stage 30, the X-axis aligners 510 disposed on two opposite X-axis sides of the heating stage 30 may be moved in a direction toward the heating stage 30 (i.e., in a direction toward the center) and brought into contact with two opposite X-axis surfaces of each of the plurality of thin glass sheets 10, thereby aligning the plurality of thin glass sheets 10 at the X-axis alignment position.
Further, the Y-axis aligner 520 provided on two opposite Y-axis sides of the heating stage 30 may be moved in a direction toward the heating stage 30 (i.e., in a direction toward the center) and brought into contact with two opposite Y-axis surfaces of each of the plurality of thin glass sheets 10, thereby aligning the plurality of thin glass sheets 10 at the Y-axis alignment position.
The aligning unit 500 may be fixed at the aligning position until the pressing operation position is completed, so as to prevent the plurality of thin glass sheets 10 from sliding or changing direction at the aligning position. After the pressing operation is completed, the aligning unit 500 may be returned (moved) to the original position.
The pressing unit 600 is used to perform a pressing operation on the plurality of thin glass sheets 10 aligned by the aligning unit 500. When the wax 20 applied to the plurality of thin glass sheets 10 disposed on the upper surface of the heating stage 30 is melted, the pressing unit 600 may move from side to side while pressing the upper surfaces of the plurality of thin glass sheets 10 so as to join the plurality of thin glass sheets 10.
In this case, the dummy glass sheets 40 may be disposed on the upper and lower surfaces of the entire plurality of thin glass sheets 10, and the plurality of thin glass sheets 10 may be joined as the pressing unit 600 moves from side to side while pressing the upper surface of the dummy glass sheet 40 disposed at the uppermost surface with a preset pressure.
In this case, when the pressing unit 600 completely performs the pressing operation on the plurality of thin glass sheets 10, the wax 20 on the surfaces of the plurality of thin glass sheets 10 may have a thickness range of 15 to 20 μm.
When a plurality of thin glass sheets 10 are loaded onto the loading forks 410 of the loading unit 400, the dummy glass sheet 40 may be loaded together with the plurality of thin glass sheets 10.
Meanwhile, the chamfering process may be performed on a plurality of thin glass sheets 10 in order to correct a stacking error occurring during the stacking process. The side surfaces of the plurality of thin glass sheets 10 may be chamfered by a Computer Numerical Control (CNC) processing apparatus, and product defects may be significantly reduced by the chamfering process.
Further, a polishing process may be performed after the chamfering process is performed to remove surface cracks caused by the previous process. Then, a repairing process (repairing process) may be performed to remove the chips caused by the previous process and remaining on the side surfaces of the plurality of thin glass sheets 10.
The repair process is performed by using a weak acid chemical. The repairing process is performed by dipping the plurality of thin glass sheets 10 in a tank storing the weak acid chemicals or by spraying the weak acid chemicals using a dispenser or the like, thereby effectively removing the chips remaining on the side surfaces of the plurality of thin glass sheets 10.
Next, after the repair process, hot water may be applied to the plurality of stacked thin glass sheets 10 so that the plurality of thin glass sheets 10 may be separated. Since the melting point of the wax 20 is 47 to 64 ℃, the plurality of thin glass sheets 10 can be separated individually and easily when the plurality of thin glass sheets 10 are immersed in a barrel filled with hot water having a temperature of at least 70 ℃.
Thus, according to an embodiment of the present disclosure, a gripper is used to hold a plurality of thin glass sheets spaced apart from each other at a predetermined interval, move the plurality of thin glass sheets down into a barrel filled with wax to a predetermined depth so that wax is applied onto surfaces of the plurality of thin glass sheets, and then unload the wax-coated plurality of thin glass sheets to a cassette. Therefore, it is possible to prevent uneven application caused by the process of maintaining the wax discharge pressure and adjusting the temperature. Further, the viscosity of the wax can be maintained to uniformly apply the wax and ensure uniformity of the applied thickness, thereby improving the processing accuracy.
Next, a process of applying wax onto the surfaces of a plurality of thin glass sheets by using the apparatus for manufacturing a thin glass sheet, unloading the plurality of thin glass sheets, and loading the plurality of thin glass sheets having wax applied to the surfaces thereof will be described.
Fig. 8 is a flowchart illustrating a process of manufacturing a thin glass sheet according to another embodiment of the present disclosure, in which wax is applied onto surfaces of a plurality of thin glass sheets, and then the plurality of thin glass sheets are stacked.
Referring to fig. 8, the grippers 220 can maintain a plurality of thin glass sheets 10 spaced apart from each other at a preset interval under the control of the transfer device 210 (step 810).
Further, the plurality of thin glass sheets 10 held by the grippers 220 can be moved to a position above the barrel 100 under the control of the transfer device 210 (step 820).
Next, the transfer device 210 may be used to move the gripper 220 downward from the upper side to the lower side of the barrel 100, and the plurality of thin glass sheets 10 held by the gripper 220 are immersed in the wax 20 so that the wax 20 may be applied to a preset position (step 830).
In this case, the wax 20 may be applied to a position relatively lower than a position where the upper ends of the plurality of thin glass sheets 10 held by the clamper 220 are fixed. This is to prevent wax 20 from being unnecessarily applied to the surface of the holder 220.
Further, a separate temperature maintaining device (e.g., a heating coil, etc.) may be provided in the tub 100, and the temperature of the tub 100 is adjusted to a temperature range of 150 to 250 ℃. This is because the thin glass sheet 10 can be coated with wax of a uniform thickness range of 20 to 40 μm even if the melting point of the wax 20 is about 47 to 64 ℃, and the denaturation rate of the wax 20 can be reduced because the viscosity of the wax 20 is low in the temperature range of 150 to 250 ℃.
In this case, in the temperature range of 150 ℃ or less, the viscosity of the wax 20 is high, which causes a problem that the thickness of the wax applied to the thin glass sheet 10 increases and the thin glass sheet 10 is damaged during the subsequent stacking process. In the temperature range of 250 ℃ or more, there are problems in that the wax 20 stored in the barrel 100 is rapidly denatured, the viscosity of the denatured wax 20 is increased, and the thickness of the wax applied to the thin glass sheet 10 is increased.
When the plurality of thin glass sheets 10 are maintained for a preset application time (e.g., 10 to 20 seconds), the wax 20 may be applied to the surfaces of the plurality of thin glass sheets 10 in a thickness range of 20 to 40 μm. The wax 20 needs to be applied between the thin glass sheets 10 in a thickness range of about 30 to 40 μm to obtain a desired effect (e.g., an effect of preventing abrasion or damage caused by direct contact and friction between a plurality of thin glass sheets 10). Therefore, the wax 20 needs to be applied to the surfaces (two opposite side surfaces) of the plurality of thin glass sheets 10 in the thickness range of 20 to 40 μm.
Next, when a preset application time (e.g., 10 to 20 seconds) has elapsed, the transfer device 210 may move the grippers 220 upward again and move the plurality of thin glass sheets 10 to the outside of the wax 20 (i.e., the upper side of the barrel 100). Thereafter, the transfer device 210 can move and unload the plurality of thin glass sheets 10 to the cassette 300.
In the case where the plurality of thin glass sheets 10 loaded in the cassette 300 are asymmetrically arranged in the upward/downward direction and the leftward/rightward direction, it is difficult to load the plurality of thin glass sheets 10 in a zigzag manner. Therefore, in the cartridge 300, wax may be additionally applied to the portion that has been held by the gripper unit 200. The portion of the tub 100 to which the wax 20 has not been applied may be coated at least twice with the wax by using a wax application apparatus.
Meanwhile, the plurality of thin glass sheets 10 loaded in the cassette 300 may be unloaded by the loading unit 400 and placed on the upper portion of the heating stage 30 (step 850).
In step 850, the loading unit 400 may load a preset number (e.g., twenty or more) of thin glass sheets 10 that have been completely coated with wax onto the upper surface of the loading forks 410 of the loading unit 400, and then place a plurality of thin glass sheets 10 on the upper surface of the heating stage 30.
For example, a configuration in which five thin glass sheets 10 are provided as the plurality of thin glass sheets 10 will be described. As shown in fig. 7, the first thin glass sheet 11 may be loaded onto the upper surface of the loading fork 410 such that the portion coated with the first wax 21 is positioned in the right direction and the upper end held by the gripper unit 200 is positioned in the left direction. The second thin glass sheet 12 may be loaded onto the upper surface of the loading fork 410 such that the portion coated with the second wax 22 is positioned in the leftward direction and the upper end held by the gripper unit 200 is positioned in the rightward direction. A third thin glass sheet 13 may be loaded in the same direction as the first thin glass sheet 11, a fourth thin glass sheet 14 may be loaded in the same direction as the second thin glass sheet 12, and a fifth thin glass sheet 15 may be loaded in the same direction as the third thin glass sheet 13. Thus, five thin glass sheets may be loaded onto the upper surface of the loading forks 410.
In this case, the heating stage 30 may perform an operation of melting the wax 20 applied to the surfaces of the plurality of thin glass sheets 10 disposed on the upper surfaces thereof by adjusting and maintaining a temperature range of 200 to 220 ℃.
Next, the plurality of thin glass sheets 10 may be aligned by using the aligning unit 500 disposed at two opposite X-axis sides and two opposite Y-axis sides of the plurality of thin glass sheets 10 (step 860).
In step 860, when the plurality of thin glass sheets 10 are positioned on the heating stage 30, the X-axis aligners 510 disposed at two opposite X-axis sides of the heating stage 30 may be moved in a direction toward the heating stage 30 (i.e., a direction toward the center) and brought into contact with two opposite X-axis surfaces of each of the plurality of thin glass sheets 10, thereby aligning the plurality of thin glass sheets 10 at the X-axis alignment position.
Further, the Y-axis aligners 520 disposed on two opposite Y-axis sides of the heating stage 30 may be moved in a direction toward the heating stage 30 (i.e., in a direction toward the center) and brought into contact with two opposite Y-axis surfaces of each of the plurality of thin glass sheets 10, thereby aligning the plurality of thin glass sheets 10 at the Y-axis alignment position.
Next, a pressing operation may be performed on the plurality of thin glass sheets 10 by using the pressing unit 600 (step 870).
In step 870, while the wax 20 applied to the plurality of thin glass sheets 10 disposed on the upper surface of the heating stage 30 is melted, a pressing operation may be performed while the pressing unit 600 is moved from side to side while pressing the upper surfaces of the plurality of thin glass sheets 10 so as to join the plurality of thin glass sheets 10.
Further, when the pressing unit 600 completely performs the pressing operation on the plurality of thin glass sheets 10, the wax 20 on the surfaces of the plurality of thin glass sheets 10 may have a thickness range of 15 to 20 μm.
In this case, the dummy glass sheets 40 may be disposed on the upper and lower surfaces of the entire plurality of thin glass sheets 10, and the plurality of thin glass sheets 10 may be joined as the pressing unit 600 moves from side to side while pressing the upper surface of the dummy glass sheet 40 disposed at the uppermost surface with a preset pressure.
Next, a plurality of thin glass sheets 10 on which the pressing operation is completely performed may be unloaded by using the loading unit 400 (step 880).
In step 880, after the joining process is completed, the plurality of thin glass sheets 10 may be unloaded as the loading unit 400 is moved upward again, and the loading forks 410 are moved upward and moved in a state where the plurality of thin glass sheets 10 are seated on the upper surfaces of the loading forks 410.
Thereafter, a chamfering process may be performed on the plurality of thin glass sheets 10 in order to correct a stacking error occurring during the stacking process. Further, a polishing process may be performed after performing the chamfering process to remove surface cracks caused by the previous process. Then, a repair process may be performed to remove the chips caused by the previous process and remaining on the side surfaces of the plurality of thin glass sheets 10.
Therefore, according to another embodiment of the present disclosure, thin glass sheets having wax applied on the surfaces thereof are stacked in a zigzag manner and then joined by using a pressing operation. Therefore, a plurality of thin glass sheets having wax applied on the surface thereof can be efficiently stacked.
Thus, according to the present disclosure, the grippers serve to hold the plurality of thin glass sheets spaced apart from each other at predetermined intervals, move the plurality of thin glass sheets down into a barrel filled with wax to a predetermined depth so that wax is applied onto the surfaces of the plurality of thin glass sheets, and then unload the wax-coated plurality of thin glass sheets into a cassette. Therefore, uneven application caused by the process of maintaining the wax discharge pressure and adjusting the temperature can be prevented. Further, the viscosity of the wax can be maintained to uniformly apply the wax and ensure uniformity of the applied thickness, thereby improving the processing accuracy.
Further, according to the present disclosure, thin glass sheets having wax applied on the surfaces thereof are stacked in a zigzag manner and then joined by using a pressing operation. Therefore, a plurality of thin glass sheets having wax applied on the surface thereof can be efficiently stacked.
While the disclosure has been shown and described in connection with exemplary embodiments, it will be apparent to those skilled in the art that modifications and variations can be made without departing from the spirit and scope of the disclosure as defined by the appended claims.
Claims (11)
1. An apparatus for manufacturing a thin glass sheet, the apparatus comprising:
a barrel filled with wax;
a gripper unit configured to hold a plurality of thin glass sheets spaced apart from each other at a preset interval, move the plurality of thin glass sheets downward into wax stored in the barrel to apply the wax onto surfaces of the plurality of thin glass sheets, move the plurality of thin glass sheets upward, and then unload the plurality of thin glass sheets into a cassette;
a loading unit configured to unload the plurality of thin glass sheets loaded in the cassette and to position the plurality of thin glass sheets on a heating stage;
an alignment unit disposed at two opposing X-axis sides and two opposing Y-axis sides of the heating stage and configured to align the plurality of thin glass sheets along X-axis and Y-axis; and
a pressing unit configured to perform a pressing operation on the plurality of thin glass sheets aligned by the aligning unit,
wherein the loading unit transfers the plurality of thin glass sheets loaded in a zigzag manner onto the upper surface of the loading fork and loads a protective dummy glass sheet onto the upper and lower surfaces of the entire plurality of thin glass sheets, and
wherein the pressing unit joins the plurality of thin glass sheets by: moving from side to side while pressing an upper surface of the dummy glass sheet located at an uppermost surface of the plurality of thin glass sheets with a preset pressure.
2. The apparatus of claim 1, wherein the gripper unit comprises:
a gripper configured to secure upper ends of the plurality of thin glass sheets; and
a transfer device configured to transfer the gripper.
3. The apparatus of claim 2, wherein the gripper unit moves the plurality of thin glass sheets downward such that the plurality of thin glass sheets are immersed in the wax to a position relatively lower than a position to which upper ends of the plurality of thin glass sheets are fixed.
4. The apparatus of claim 3, wherein the temperature of the barrel is regulated to a temperature range of 150 to 250 ℃.
5. The device of claim 4, wherein the wax is applied in a thickness range of 20 to 40 μm.
6. The apparatus of claim 1, wherein the alignment unit comprises:
an X-axis aligner disposed on two opposite X-axis sides of the heating stage and configured to be movable along the X-axis; and
a Y-axis aligner disposed on two opposite Y-axis sides of the heating stage and configured to be movable along the Y-axis.
7. The apparatus of claim 6, wherein the heating stage is maintained at a temperature in the range of 200 to 250 ℃.
8. A method of making a thin glass sheet, the method comprising the steps of:
holding a plurality of thin glass sheets spaced apart from each other at a preset interval by a gripper under the control of a transfer device;
moving the plurality of thin glass sheets held by the grippers to a position above a bucket filled with wax under control of the transfer device;
moving the gripper downward from an upper side to a lower side of the barrel by the transfer device and dipping the plurality of thin glass sheets into the wax to apply the wax to a preset position;
moving the gripper upward to move the plurality of thin glass sheets to a position above the barrel and then unloading the plurality of thin glass sheets to a cassette when a preset application time elapses;
unloading the plurality of thin glass sheets loaded in the cassette by a loading unit and placing the plurality of thin glass sheets on an upper portion of a heating stage;
aligning the plurality of thin glass sheets by using alignment units disposed at two opposite X-axis sides and two opposite Y-axis sides of the plurality of thin glass sheets;
performing a pressing operation on the plurality of thin glass sheets by a pressing unit; and
unloading the plurality of thin glass sheets having completed the pressing operation from the loading unit,
wherein the step of disposing the plurality of thin glass sheets on the upper portion of the heating stage loads the plurality of thin glass sheets on the upper surface of the loading fork of the loading unit in a zigzag manner and loads protective dummy glass sheets on the upper and lower surfaces of the entire plurality of thin glass sheets, and
wherein the step of performing the pressing operation engages the plurality of thin glass sheets by moving from side to side while pressing the upper surface of the dummy glass sheet at the uppermost surface of the plurality of thin glass sheets with a preset pressure.
9. The method of claim 8, wherein the temperature of the barrel is adjusted within a temperature range of 150 to 250 ℃ to maintain the viscosity of the wax while the wax is applied.
10. The method of claim 9, wherein the wax is applied to the surfaces of the plurality of thin glass sheets in a thickness range of 20 to 40 μ ι η when the wax is applied.
11. The method of claim 10, wherein the temperature of the heating stage is maintained within a temperature range of 200 to 250 ℃.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2021-0109913 | 2021-08-20 | ||
| KR1020210109913A KR102364784B1 (en) | 2021-08-20 | 2021-08-20 | Apparatus for manufacturing thin glass and method and its method |
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| Publication Number | Publication Date |
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| CN115707637A true CN115707637A (en) | 2023-02-21 |
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| CN202210906498.2A Pending CN115707637A (en) | 2021-08-20 | 2022-07-29 | Apparatus and method for making thin glass sheets |
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| KR (1) | KR102364784B1 (en) |
| CN (1) | CN115707637A (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2351718A4 (en) | 2008-10-23 | 2013-05-08 | Asahi Glass Co Ltd | Glass substrate laminated device and method for producing laminate glass substrate |
| JP2010215480A (en) * | 2009-03-19 | 2010-09-30 | Nippon Electric Glass Co Ltd | Method of laminating brittle plate and method of processing thereof |
| KR102525334B1 (en) * | 2016-03-03 | 2023-04-27 | 주식회사 탑 엔지니어링 | Scribing apparatus |
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- 2021-08-20 KR KR1020210109913A patent/KR102364784B1/en active IP Right Grant
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| KR102364784B1 (en) | 2022-02-18 |
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