Display backboard shaping die
By designing a curved forming mold and a pressing insert, the problem of uneven bezels on the monitor back panel was solved, achieving high-precision forming results and improving production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN RENDING MOULD CO LTD
- Filing Date
- 2025-05-09
- Publication Date
- 2026-04-21
AI Technical Summary
Traditional monitor back panels are prone to uneven bezels during the stamping process, especially aluminum alloy back panels where the bezels fold outwards or lift up after three bending processes, resulting in flatness that does not meet requirements.
The forming mold design adopts an upper mold and a lower mold. The first forming surface of the upper mold and the second forming surface of the lower mold are both arc surfaces with a central angle of 0.05-0.06 degrees. When the mold is closed, the back panel of the display is bent towards the geometric center. Combined with the design of multiple pressure blocks and inserts, the precise forming of the bezel is ensured.
This improved the flatness of the monitor back panel bezel, avoided springback damage, increased shaping accuracy and production efficiency, and reduced manufacturing costs.
Smart Images
Figure CN224143206U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of display manufacturing technology, and in particular to a display backplate shaping mold. Background Technology
[0002] Traditional large commercial and educational displays are bulky and require a strong back panel. The back panel can be made of aluminum alloy or iron alloy. Aluminum alloy back panels have high structural strength, but the production cost is high. Iron alloy back panels are formed by stamping. To ensure that the back panel has sufficient strength, the frame of the back panel needs to be stamped and bent in one piece. The edge of the display back panel needs to go through three bending processes to ensure that the shape and size of the formed frame meet the design requirements.
[0003] During the production of monitor back panels, in addition to forming the bezel through three bending processes, a convex bulge also needs to be formed. The monitor back panel is subjected to stress and deformation during the stamping process, causing the bezel to flip outwards or warp outwards. This results in the bezel not being perfectly flush, and the monitor back panel's flatness failing to meet requirements. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides a display backplate shaping mold.
[0005] This utility model provides a display back panel shaping mold, including an upper mold and a lower mold. The upper mold includes an upper mold base and an upper ejector plate, with the upper ejector plate fixed to the lower side of the upper mold base. The lower mold includes a lower mold base and a lower template, with the lower template fixed above the lower mold base. The upper ejector plate has an upwardly recessed first shaping surface, and the lower template has an upwardly convex second shaping surface. Both the first and second shaping surfaces are arc-shaped curved surfaces with a central angle of 0.05-0.06 radians. During mold closing, the first and second shaping surfaces press against the display back panel, causing the display back panel to bend towards its geometric center.
[0006] In some embodiments, during mold closing, the bending radius of the display backplate pressed between the first shaping surface and the second shaping surface is 30,000-35,000 mm.
[0007] In some embodiments, during mold closing, the bending radius of the display back panel in the length direction is greater than the bending radius in the width direction.
[0008] In some embodiments, during mold closing, the bending sagitta of the display backplate pressed between the first shaping surface and the second shaping surface is 10-20 mm.
[0009] In some embodiments, the first shaping surface of the upper mold plate contacts the outer side of the display back panel, and the second shaping surface of the lower mold plate contacts the inner side of the display back panel. During mold closing, the frame of the display back panel does not contact the lower mold plate.
[0010] In some embodiments, the upper stripper includes a first upper pressing block arranged along the length direction and a second upper pressing block arranged along the width direction. A plurality of first upper pressing blocks and a plurality of second upper pressing blocks are arranged to form a first shaping frame. The lower template includes a first lower pressing block arranged along the length direction and a second lower pressing block arranged along the width direction. A plurality of first lower pressing blocks and a plurality of second lower pressing blocks are arranged to form a second shaping frame. The first shaping frame and the second shaping frame perform stamping and shaping on the frame of the display back panel.
[0011] In some embodiments, the upper ejector plate includes a plurality of first inserts arranged along the length direction and a plurality of second inserts arranged along the width direction, and the lower template includes a plurality of third inserts arranged along the length direction and a plurality of fourth inserts arranged along the width direction. The first inserts and third inserts are respectively arranged on both sides of a protrusion arranged along the length direction of the display back panel, and the second inserts and fourth inserts are respectively arranged on both sides of a protrusion arranged along the width direction of the display back panel.
[0012] In some embodiments, the lower end faces of the first insert, the second insert, the first upper pressing block, and the second upper pressing block respectively form a first shaping surface, and the upper end faces of the third insert, the fourth insert, the first lower pressing block, and the second lower pressing block respectively form a second shaping surface.
[0013] In some embodiments, the first pressing block and the second pressing block are provided with clearance grooves, and the frame of the display back panel is located in the clearance grooves when the mold is closed.
[0014] In some embodiments, the upper mold base is provided with a plurality of first inserts, and the lower mold base is provided with a plurality of second inserts, wherein the first inserts and the second inserts press the rivets into the fixing holes of the display back panel.
[0015] Compared with the prior art, the beneficial effects of this utility model are: the first shaping surface of the upper stripper and the second shaping surface of the lower template are both arc-shaped curved surfaces. When the upper mold and the lower mold are closed, they press the display back panel, so that the display back panel is uniformly bent in the direction of the geometric center on the inner side, correcting the C-shaped frame of the display back panel that is turned outward, and performing precise shaping on the display back panel. Attached Figure Description
[0016] Figure 1 This is a three-dimensional structural diagram of the upper mold according to an embodiment of this application.
[0017] Figure 2It is a schematic three-dimensional structure diagram of the lower mold in the embodiment of the present application.
[0018] Figure 3 It is a schematic side view structure diagram of the display backplane shaping mold in the mold closing state in the embodiment of the present application.
[0019] Figure 4 It is a schematic plan structure diagram of the display backplane in the embodiment of the present application.
[0020] Figure 5 It is a schematic internal structure diagram of the display backplane shaping mold in the mold closing state in the embodiment of the present application.
[0021] Reference numerals: 11, upper mold base; 12, upper stripper plate;
[0022] 21, lower mold base; 22, lower template;
[0023] 31, first upper pressing block; 32, second upper pressing block; 33, first shaping frame;
[0024] 41, first lower pressing block; 42, second lower pressing block; 43, second shaping frame; 44, relief groove;
[0025] 51, first insert; 52, second insert;
[0026] 61, third insert; 62, fourth insert;
[0027] 71, first shaping surface; 72, second shaping surface;
[0028] 81, first insert block; 82, second insert block; 83, rivet;
[0029] 9, display backplane; 91, main body; 92, frame; 93, inner side surface; 94, outer side surface; 95, convex hull; 96, bending rise. Detailed implementation manners
[0030] The detailed implementation manners of the present utility model are introduced with reference to the attached drawings.
[0031] Refer to Figure 1 , in the figure is the upper mold of the display backplane 9 shaping mold. The upper mold includes an upper mold base 11 and an upper stripper plate 12. The upper mold base 11 is a flat plate. The upper stripper plate 12 is composed of a rectangular first shaping frame 33, a first insert 51 and a second insert 52 forming a cross shape. There is a void between the first shaping frame 33 and the first insert 51 and the second insert 52. The outer side surface 94 of the display backplane 9 contacts the first shaping frame 33, the first insert 51 and the second insert 52 of the upper stripper plate 12, and together with the lower template 22, shapes the display backplane 9.
[0032] Refer to Figures 1 to 5A shaping mold for a display back panel 9 includes an upper mold and a lower mold. The upper mold includes an upper mold base 11 and an upper ejector plate 12, with the upper ejector plate 12 fixed to the lower side of the upper mold base 11. The lower mold includes a lower mold base 21 and a lower template 22, with the lower template 22 fixed above the lower mold base 21. The upper ejector plate 12 is provided with an upwardly recessed first shaping surface 71, and the lower template 22 is provided with an upwardly protruding second shaping surface 72. Both the first shaping surface 71 and the second shaping surface 72 are arc-shaped surfaces with a central angle radian of 0.05-0.06 radians. During mold closing, the first shaping surface 71 and the second shaping surface 72 press against the display back panel 9, causing the display back panel 9 to bend towards the geometric center.
[0033] In the display back panel 9 shaping mold of this application, the first shaping surface 71 of the upper stripper 12 and the second shaping surface 72 of the lower template 22 are both arc-shaped curved surfaces. When the upper mold and the lower mold are closed, the display back panel 9 is pressed together, so that the display back panel 9 is uniformly bent in the direction of the geometric center inward, correcting the C-shaped frame 92 of the display back panel 9 that is turned outward, and performing precise shaping on the display back panel 9.
[0034] To avoid excessive springback of the display backplate 9, in this embodiment, reference is made to... Figures 3 to 5 During mold closing, the bending radius of the display backplate 9 pressed between the first shaping surface 71 and the second shaping surface 72 is 30000-35000mm. Specifically, during mold closing, the bending radius of the display backplate 9 in the length direction is greater than the bending radius in the width direction.
[0035] Understandably, with this setting, when the monitor back panel 9 is bent and shaped, a bending radius of 30,000-35,000 mm is used. A larger bending radius can avoid damaging the monitor back panel 9, reduce the amount of springback of the monitor back panel 9 when the mold is opened, and reduce the impact of springback on the dimensional accuracy of the shaping to a certain extent, so that the final shape of the monitor back panel 9 after springback is more in line with the requirements.
[0036] In order to precisely control the rebound amount of the display back panel 9, in this embodiment, reference is made to... Figures 3 to 5 During mold closing, the bending sagitta 96 of the display backplate 9 pressed between the first shaping surface 71 and the second shaping surface 72 is 10-20mm.
[0037] Understandably, with this setup, a bending height of 10-20mm 96 can ensure a lower degree of bending for large-sized monitor back panels 9, and better control the amount of springback of monitor back panels 9.
[0038] To achieve the shaping function, in this embodiment, reference is made to... Figure 5The first shaping surface 71 of the upper stripper plate 12 contacts the outer side 94 of the display back plate 9, and the second shaping surface 72 of the lower template 22 contacts the inner side 93 of the display back plate 9. During mold closing, the frame 92 of the display back plate 9 does not contact the lower template 22.
[0039] Understandably, with this configuration, the first shaping surface 71 is recessed upwards and the second shaping surface 72 is convex upwards. When the first shaping surface 71 and the second shaping surface 72 press against the monitor back panel 9, the center of the main body 91 of the monitor back panel 9 is lifted upwards, and the monitor back panel 9 bends inwards towards the geometric center. The frame 92 of the monitor back panel 9 will move slightly inwards. The frame 92 of the monitor back panel 9 does not contact the lower template 22, which can give the frame 92 enough room to move, while avoiding damage to the frame 92 of the monitor back panel 9.
[0040] In order to perform precise shaping of the display back panel 9, in this embodiment, reference is made to... Figure 1 and Figure 2 The upper stripper plate 12 includes a first upper pressing block 31 arranged along the length direction and a second upper pressing block 32 arranged along the width direction. Multiple first upper pressing blocks 31 and multiple second upper pressing blocks 32 are arranged to form a first shaping frame 33. The lower template 22 includes a first lower pressing block 41 arranged along the length direction and a second lower pressing block 42 arranged along the width direction. Multiple first lower pressing blocks 41 and multiple second lower pressing blocks 42 are arranged to form a second shaping frame 43. The first shaping frame 33 and the second shaping frame 43 perform stamping and shaping on the frame 92 of the display back panel 9.
[0041] Understandably, with this setup, multiple first upper pressing blocks 31 and multiple second upper pressing blocks 32 are processed in segments and then spliced together to form the first shaping frame 33. Multiple first lower pressing blocks 41 and multiple second lower pressing blocks 42 are processed in segments and then spliced together to form the second shaping frame 43. This reduces the manufacturing difficulty and cost of the first shaping frame 33 and the second shaping frame 43. The position between the main body 91 of the display back panel 9 and the frame 92 is stamped and shaped to ensure that the shape of the frame 92 meets the requirements.
[0042] In order to act on the key positions of the display back panel 9, in this embodiment, reference is made to... Figure 1 and Figure 2 The upper ejector plate 12 includes multiple first inserts 51 arranged along the length direction and multiple second inserts 52 arranged along the width direction. The lower template 22 includes multiple third inserts 61 arranged along the length direction and multiple fourth inserts 62 arranged along the width direction. The first inserts 51 and the third inserts 61 are respectively arranged on both sides of the protrusion 95 arranged along the length direction of the display back plate 9. The second inserts 52 and the fourth inserts 62 are respectively arranged on both sides of the protrusion 95 arranged along the width direction of the display back plate 9.
[0043] Understandably, this configuration increases the mechanical strength of the main body 91 of the monitor back panel 9 by increasing the strength of the convex hull 95. By setting the first insert 51, the second insert 52, the third insert 61 and the fourth insert 62 at the corresponding positions of the convex hull 95, the main body 91 of the monitor back panel 9 is bent by pulling the convex hull 95 at these key positions, thus achieving precise shaping of the monitor back panel 9.
[0044] In order to form the shaped surface, in this embodiment, reference is made to... Figure 1 and Figure 2 The lower end faces of the first insert 51, the second insert 52, the first upper pressing block 31 and the second upper pressing block 32 respectively form the first shaping surface 71, and the upper end faces of the third insert 61, the fourth insert 62, the first lower pressing block 41 and the second lower pressing block 42 respectively form the second shaping surface 72.
[0045] Understandably, with this configuration, neither the first shaping surface 71 nor the second shaping surface 72 is a complete arc surface. There is an empty space between the first upper pressing block 31, the second upper pressing block 32, the first insert 51, and the second insert 52. There is also an empty space between the third insert 61, the fourth insert 62, the first lower pressing block 41, and the second lower pressing block 42. By acting on the monitor back panel 9 through these key positions, the contact area between the first shaping surface 71, the second shaping surface 72, and the monitor back panel 9 is reduced, thus preventing the monitor back panel 9 from being scratched when it is bent.
[0046] To prevent the bezel 92 of the display back panel 9 from bending relative to the main body 91, in this embodiment, reference is made to... Figure 2 The first pressing block 41 and the second pressing block 42 are provided with a relief groove 44. When the mold is closed, the frame 92 of the display back plate 9 is located in the relief groove 44.
[0047] Understandably, this design allows the bezel 92 of the monitor back panel 9 to make way for the back panel 9 through the clearance groove 44. When the main body 91 of the monitor back panel 9 is bent and shaped, the bezel 92 of the monitor back panel 9 will move slightly together and will not directly contact the lower template 22. This avoids the bezel 92 from bending relative to the main body 91 of the monitor back panel 9 due to the obstruction of the lower template 22, thus ensuring the flatness of the bezel 92 of the monitor back panel 9.
[0048] In order to press-fit rivet 83, in this embodiment, refer to Figure 1 , Figure 2 and Figure 5 The upper mold base 11 is provided with four first inserts 81, and the lower mold base 21 is provided with four second inserts 82. The first inserts 81 and the second inserts 82 press the rivets 83 into the fixing holes of the display back plate 9.
[0049] It should be further explained that before shaping, rivets 83 are placed on the first insert 81 and the second insert 82, and then the display back plate 9 is placed, or rivets 83 are placed in the fixing holes of the display back plate 9, and then placed together on the lower template 22.
[0050] Understandably, with this setup, when the upper die presses towards the lower die, the first insert 81 and the second insert 82 press the rivet 83, causing the rivet 83 to be pressed into the fixing hole of the display back panel 9, thus completing the riveting operation.
[0051] The display back panel 9 forming mold of this application can precisely shape the main body 91 of the display back panel 9 through the cooperation of multiple inserts and pressure blocks of the upper and lower molds, ensuring the flatness of the frame 92 of the display back panel 9, and realizing high-precision shaping of the display back panel 9. It also completes the pressing of rivets 83 through the first insert 81 and the second insert 82, thereby improving production efficiency.
[0052] The above does not limit the technical scope of this utility model. Any modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this utility model shall still fall within the scope of the technical solution of this utility model.
Claims
1. A display backplane shaping mold characterized by, The device includes an upper mold and a lower mold. The upper mold includes an upper mold base and an upper ejector plate, with the upper ejector plate fixed to the lower side of the upper mold base. The lower mold includes a lower mold base and a lower template, with the lower template fixed above the lower mold base. The upper ejector plate has a first shaping surface that is concave upwards, and the lower template has a second shaping surface that is convex upwards. Both the first and second shaping surfaces are arc-shaped surfaces with a central angle of 0.05-0.06 radians. During mold closing, the first and second shaping surfaces press against the back panel of the display, causing the back panel of the display to bend towards the geometric center.
2. The display backplane shaping mold of claim 1, wherein, During mold closing, the bending radius of the display backplate pressed between the first shaping surface and the second shaping surface is 30000-35000mm.
3. The display backplane shaping mold of claim 2, wherein, During mold closing, the bending radius of the display back panel in the length direction is greater than the bending radius in the width direction.
4. The display backplane shaping mold of claim 1, wherein, During mold closing, the bending sagitta of the display backplate pressed between the first shaping surface and the second shaping surface is 10-20mm.
5. The display backplane shaping mold of claim 1, wherein, The first shaping surface of the upper mold plate contacts the outer side of the display back panel, and the second shaping surface of the lower mold plate contacts the inner side of the display back panel. When the mold is closed, the frame of the display back panel does not contact the lower mold plate.
6. The display backplane shaping mold of claim 5, wherein, The upper stripper includes a first upper pressing block arranged along the length direction and a second upper pressing block arranged along the width direction. Multiple first upper pressing blocks and multiple second upper pressing blocks are arranged to form a first shaping frame. The lower template includes a first lower pressing block arranged along the length direction and a second lower pressing block arranged along the width direction. Multiple first lower pressing blocks and multiple second lower pressing blocks are arranged to form a second shaping frame. The first shaping frame and the second shaping frame perform stamping and shaping on the frame of the display back panel.
7. The display backplane shaping mold of claim 6, wherein, The upper ejector plate includes multiple first inserts arranged along the length direction and multiple second inserts arranged along the width direction. The lower template includes multiple third inserts arranged along the length direction and multiple fourth inserts arranged along the width direction. The first inserts and third inserts are respectively arranged on both sides of the protrusion arranged along the length direction of the display back panel, and the second inserts and fourth inserts are respectively arranged on both sides of the protrusion arranged along the width direction of the display back panel.
8. The display backplane shaping mold of claim 7, wherein, The lower end faces of the first insert, the second insert, the first upper pressing block, and the second upper pressing block respectively form the first shaping surface, and the upper end faces of the third insert, the fourth insert, the first lower pressing block, and the second lower pressing block respectively form the second shaping surface.
9. The display backplane shaping mold of claim 6, wherein, The first pressing block and the second pressing block are provided with clearance grooves. When the mold is closed, the frame of the display back panel is located in the clearance groove.
10. The display backplane shaping mold of claim 1, wherein, The upper mold base is provided with a plurality of first inserts, and the lower mold base is provided with a plurality of second inserts. The first inserts and the second inserts press the rivets into the fixing holes of the display back panel.