Secondary bending die for display backboard frame

Abstract

The utility model relates to a display backboard frame secondary bending die which comprises an upper die and a lower die, the upper die comprises a first die holder, a first die plate and a first stripper plate, the first die plate is movably installed on the lower side of the first die holder, the first stripper plate is fixed with the first die plate, the first die holder is provided with a stop plate, and the lower die comprises a second die holder, a second die plate and a second stripper plate. An inclined sliding block is arranged on the edge of the second mold plate, an ejector pin is arranged on the second mold base in the mold opening direction, during mold closing, the stopping plate bends the edge of the display back plate downwards to form a second bent part, the first bent part on the edge of the display back plate moves into an avoiding groove of the inclined sliding block, and during mold opening, the ejector pin pushes the inclined sliding block to move upwards in an inclined mode along an inclined guide groove; and the avoiding groove is driven to be separated from the first bending part. According to the utility model, the edge of the display back plate is bent into the second bent part through the stop plate, and the first bent part at the edge of the display back plate moves into the avoiding groove of the inclined sliding block and is separated from the inclined sliding block during mold opening.

Description

Technical Field

[0001] This utility model relates to the field of display manufacturing technology, and in particular to a secondary bending mold for the back panel frame of a display. 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] Traditional stamping dies often struggle to achieve high-precision bending operations when bending the edges of the back panel due to limitations in the die structure. This results in errors in bending angle and dimensions, affecting the assembly and use of the display. Furthermore, interference between the back panel frame and the die can easily occur during the die-opening process, causing difficulties in die opening and potentially damaging the back panel frame or the die, increasing production costs and time. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a secondary bending mold for the back panel bezel of a display.

[0005] This utility model provides a secondary bending mold for a display back panel bezel, including an upper mold and a lower mold. The upper mold includes a first mold base, a first template, and a first stripper plate arranged sequentially from top to bottom. The first template is movably installed on the lower side of the first mold base, and the first stripper plate is fixed to the first template. A stop plate is provided on the outer side of the first stripper plate of the first mold base. The lower mold includes a second mold base, a second template, and a second stripper plate fixedly connected sequentially from bottom to top. An inclined slider is provided on the edge of the second template. The second template is movably connected to the inclined slider through an inclined guide groove. An ejector pin is provided on the second mold base along the mold opening direction. The ejector pin is connected to the inclined slider. When the mold is closed, the first stripper plate and the second stripper plate stamp and form the display back panel. The stop plate bends the edge of the display back panel downward to form a second bent portion. The first bent portion of the edge of the display back panel moves into the relief groove of the inclined slider. When the mold is opened, the ejector pin pushes the inclined slider to move obliquely upward along the inclined guide groove, causing the relief groove to disengage from the first bent portion.

[0006] In some embodiments, the second template is provided with multiple oblique sliders on the edges corresponding to the first short side, the second short side, and the first long side of the display back panel.

[0007] In some embodiments, the first mold base is fixedly connected to the first support plate by a plurality of upper pads, and the lower side of the first mold base is fixedly connected to the stop plate by a first clamping plate, and there is a gap between the first clamping plate and the first template.

[0008] In some embodiments, a limiting bolt and a first spring are provided between the first clamping plate and the first template. The first clamping plate pulls the first template through the limiting bolt, and the first spring acts on the first mold base and the first template. The first template is mounted on the lower side of the first clamping plate in a floating manner through the first spring and the limiting bolt.

[0009] In some embodiments, the stop plate is provided with a bent arc surface that mates with the edge of the inclined slider, and the bent arc surface is disposed in the first release direction.

[0010] In some embodiments, the second mold base is fixedly connected to the second support plate via a plurality of second feet, and the upper side of the second mold base is fixedly connected to the second template via a second pad.

[0011] In some embodiments, the second mold base is provided with a second spring on the underside of the ejector pin.

[0012] In some embodiments, a side top block is provided on the outer side of the second template, the side top block is connected to a mounting block, the mounting block is fixedly connected to the second pad, and a insert is provided downward on the first mold base. The insert cooperates with the side top block through an inclined surface. When the upper mold and the lower mold are closed, the insert drives the side top block to move towards the second template to fold the edge of the second long side of the display back panel inward.

[0013] In some embodiments, a pin is provided between the mounting block and the side top block, the pin is fixedly connected to the side top block, and a third spring is sleeved on the pin, the third spring acting between the pin and the mounting block.

[0014] In some embodiments, the side top block is provided with a step that matches the first stripper edge, and when the upper mold and the lower mold are closed, there is a gap between the step and the first stripper edge.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: by setting a stop plate on the outside of the first ejector plate, during the mold closing process, the stop plate moves downward relative to the first template, bending the edge of the display back plate to form a second bent part. The first bent part already formed on the edge of the display back plate moves into the relief groove of the inclined slider. Then, during mold opening, the ejector pin pushes the inclined slider to move obliquely upward along the inclined guide groove, causing the relief groove to disengage from the first bent part, thereby achieving smooth mold opening. The second mold base is provided with ejector pins along the mold opening direction. The ejector pins are connected to the inclined slider, and the ejector pins push the inclined slider to move during the mold opening process. Attached Figure Description

[0016] Figure 1 This is a front view structural diagram of the secondary bending mold for the display back panel frame according to an embodiment of this application.

[0017] Figure 2 This is a schematic diagram of the display back panel planar structure according to an embodiment of this application.

[0018] Figure 3 This is a schematic diagram of the mold opening and closing structure of the secondary bending mold for the display back panel frame according to an embodiment of this application.

[0019] Figure 4 This is a schematic diagram of the upper mold plane structure of the secondary bending mold for the display back panel frame according to an embodiment of this application.

[0020] Figure 5 This is a schematic diagram of the lower die planar structure of the secondary bending mold for the display back panel frame according to an embodiment of this application.

[0021] Reference numerals: 101, Display back panel; 102, First bend; 103, Second bend; 104, First short side; 105, Second short side; 106, First long side; 107, Second long side;

[0022] 11. First support plate; 12. First foot pad; 13. First mold base; 14. First clamping plate; 15. First template; 16. First release plate;

[0023] 21. Second support plate; 22. Second foot pad; 23. Second mold base; 24. Second backing plate; 25. Second template; 26. Second ejector plate;

[0024] 31. Stop plate; 32. Bending arc surface;

[0025] 41. Angled slider; 42. Alternating groove; 43. Ejector pin; 44. Second spring; 45. Angled guide groove;

[0026] 51. Side top block; 52. Step; 53. Mounting block; 54. Insert knife; 55. Bevel; 56. Pin; 57. Third spring;

[0027] 61. Limit bolt; 62. First spring. Detailed Implementation

[0028] The specific embodiments of this utility model are described with reference to the accompanying drawings.

[0029] refer to Figure 1 The figure shows a front view of the secondary bending mold for the back panel 101 of the display. It consists of two main parts: an upper mold and a lower mold. The back panel 101 of the display is located between the upper mold and the lower mold. During the downward pressing process of the upper mold, the edge of the back panel of the display is bent twice.

[0030] refer to Figures 1 to 5 A secondary bending die for the bezel of a display back panel 101 includes an upper die and a lower die. The upper die includes a first die base 13, a first template 15, and a first ejector plate 16 arranged sequentially from top to bottom. The first template 15 is movably mounted on the lower side of the first die base 13, and the first ejector plate 16 is fixed to the first template 15. A stop plate 31 is provided on the outer side of the first ejector plate 16 of the first die base 13. The lower die includes a second die base 23, a second template 25, and a second ejector plate 26 fixedly connected sequentially from bottom to top. An inclined slider 41 is provided on the edge of the second template 25, and the second template 25 passes through an inclined guide groove 45. The second mold base 23 is movably connected to the inclined slider 41 and is provided with an ejector pin 43 along the mold opening direction. The ejector pin 43 is connected to the inclined slider 41. When the mold is closed, the first ejector plate 16 and the second ejector plate 26 stamp the display back plate 101. The stop plate 31 bends the edge of the display back plate 101 downward to form the second bent part 103. The first bent part 102 of the edge of the display back plate 101 moves into the relief groove 42 of the inclined slider 41. When the mold is opened, the ejector pin 43 pushes the inclined slider 41 to move obliquely upward along the inclined guide groove 45, causing the relief groove 42 to disengage from the first bent part 102.

[0031] The secondary bending mold for the display back panel 101 frame of this application includes a stop plate 31 set on the outside of the first release plate 16. During the mold closing process, the stop plate 31 moves downward relative to the first template 15, bending the edge of the display back panel 101 to form a second bent part 103. The first bent part 102 already formed on the edge of the display back panel 101 moves into the relief groove 42 of the inclined slider 41. Then, during mold opening, the ejector pin 43 pushes the inclined slider 41 to move obliquely upward along the inclined guide groove 45, causing the relief groove 42 to disengage from the first bent part 102, thereby achieving smooth demolding. The second mold base 23 is provided with an ejector pin 43 along the mold opening direction. The ejector pin 43 is connected to the inclined slider 41. During the mold opening process, the ejector pin 43 pushes the inclined slider 41 to move.

[0032] In order to bend the three edges of the display back panel 101 by 90°, in this embodiment, reference is made to... Figure 2 and Figure 5 The second template 25 has multiple oblique sliders 41 on each edge corresponding to the first short side 104, the second short side 105, and the first long side 106 of the display back panel 101.

[0033] Understandably, with this configuration, the first short side 104, the second short side 105, and the first long side 106 of the display back panel 101 are all bent downwards by 90° to form the second bent portion 103. In order to avoid the oblique slider 41 getting stuck, the length of the oblique slider 41 cannot be too long. The first long side 106 uses five oblique sliders 41, and the first short side 104 and the second short side 105 both use three oblique sliders 41. The configuration of these oblique sliders 41 can effectively bend the three edges of the display back panel 101 and successfully complete the demolding of the display back panel 101.

[0034] In order to allow the first template 15 to have some room to move during operation, in this embodiment, reference is made to... Figure 1 and Figure 3 The first mold base 13 is fixedly connected to the first support plate 11 through multiple first pads 12, and the lower side of the first mold base 13 is fixedly connected to the stop plate 31 through the first clamping plate 14. There is a gap between the first clamping plate 14 and the first template 15.

[0035] Understandably, with this configuration, the first mold base 13 is connected to the first support plate 11 via the first pad 12, and is fixedly connected to the stop plate 31 via the first clamping plate 14. The first pad 12 is rectangular in shape and is made of high-strength steel to provide sufficient strength and stability, ensuring a firm and reliable connection between the first mold base 13 and the first support plate 11. The stop plate 31 is fixed together with the first clamping plate 14, and a certain gap is reserved between the first clamping plate 14 and the first template 15. The purpose of this gap is to allow the stop plate 31 to move downward relative to the first template 15 when the mold is closed, thereby bending the edge of the display back plate 101 that extends beyond the second release plate 26 by the stop plate 31.

[0036] In order to make the first template 15 movably disposed under the first clamping plate 14, in this embodiment, reference is made to... Figure 1 A limiting bolt 61 and a first spring 62 are provided between the first clamping plate 14 and the first template 15. The first clamping plate 14 pulls the first template 15 through the limiting bolt 61, and the first spring 62 acts on the first mold base 13 and the first template 15. The first template 15 is installed on the lower side of the first clamping plate 14 in a floating manner through the first spring 62 and the limiting bolt 61.

[0037] Understandably, with this setup, the limiting bolt 61 is used to pull the first template 15, hoisting the first template 15 onto the lower side of the upper and lower clamping plates. At the same time, under the limiting of the stop plate 31, it is ensured that the first template 15 will not deviate or shake excessively during its up and down movement, thus keeping the movement trajectory of the first template 15 stable. The first spring 62 applies elastic force to the first mold base 13 and the first template 15, allowing the first template 15 to be installed on the lower side of the first clamping plate 14 in a floating manner within a suitable elastic range.

[0038] In order to complete the bending of the display back panel 101, in this embodiment, reference is made to... Figure 3 The stop plate 31 is provided with a bent arc surface 32 that cooperates with the edge of the inclined slider 41, and the bent arc surface 32 is positioned in the direction of the first release plate 16.

[0039] Understandably, with this setup, when the mold is closed, the stop plate 31 moves downward relative to the first template 15, and the bent arc surface 32 of the stop plate 31 will contact the edge of the display back plate 101 that extends beyond the second stripper plate 26, and bend the edge downward. The bent arc surface 32 is an arc shape, and its radius is determined according to the actual bending requirements. The cooperation between the bent arc surface 32 and the edge of the inclined slider 41 can complete the bending action more smoothly, and can precisely control the bending angle and shape.

[0040] In order to form a structurally stable lower mold, in this embodiment, reference is made to... Figure 1 The second mold base 23 is fixedly connected to the second support plate 21 through multiple second pads 22, and the upper side of the second mold base 23 is fixedly connected to the second template 25 through the second pad 24.

[0041] Understandably, with this configuration, the second mold base 23 is fixedly connected to the second support plate 21 via multiple second feet 22, and fixedly connected to the lower module via the second pad 24. The second feet 22 have good toughness and strength and can withstand the pressure of the upper mold on the lower mold when the mold is closed. The second pad 24 is used to raise the second template 25, providing sufficient height for the movement of the inclined slider 41, which facilitates demolding.

[0042] To ensure smooth demolding, in this embodiment, reference is made to... Figure 1 and Figure 3 The second mold base 23 has a second spring 44 on the lower side of the ejector pin 43.

[0043] Understandably, with this configuration, inside the second mold base 23, the ejector pin 43 is positioned along the mold opening direction, with the top of the ejector pin 43 contacting the bottom of the inclined slider 41. The second spring 44 on the lower side of the ejector pin 43 provides an upward thrust to the ejector pin 43. When the mold is closed, the upper mold pushes the inclined slider 41 downwards, while compressing the second spring 44. When the mold is opened, the second spring 44 pushes the ejector pin 43 upwards, and the ejector pin 43 pushes the inclined slider 41 upwards along the inclined guide groove 45, so that the first bent portion 102 of the display back plate 101 disengages from the relief groove 42, allowing the display back plate 101 to smoothly separate from the second release plate 26.

[0044] In order to fold the edge of the second long side 107 of the display back panel 101 inward, in this embodiment, referencing Figures 1 to 5A side top block 51 is provided on the outer side of the second template 25. The side top block 51 is connected to a mounting block 53. The mounting block 53 is fixedly connected to the second pad 24. A inserter 54 is provided downward on the first mold base 13. The inserter 54 cooperates with the side top block 51 through the inclined surface 55. When the upper mold and the lower mold are closed, the inserter 54 drives the side top block 51 to move towards the second template 25 so as to fold the edge of the second long side 107 of the display back panel 101 inward.

[0045] Understandably, with this configuration, a side top block 51 and a mounting block 53 are provided on the outer side of the second template 25. The side top block 51 corresponds to the second long side 107 of the display back panel 101. The mounting block 53 is fixedly connected to the second pad 24. The side top block 51 is movably positioned between the mounting block 53 and the second template 25. The inserter 54 of the upper mold and the side top block 51 cooperate through the cooperation of the inclined surface 55. When the upper mold and the lower mold are closed, the inclined surface 55 of the inserter 54 contacts and interacts with the inclined surface 55 of the side top block 51. The inserter 54 drives the side top block 51 to move. The angle of the inclined surface 55 of the inserter 54 and the side top block 51 is set according to actual needs, such as 30-45°. During the process of the upper mold and the lower mold being closed, the inserter 54 moves downward and drives the side top block 51 to move towards the second template 25 through the action of the inclined surface 55. The side top block 51 folds the edge of the second long side 107 of the display back panel 101 inward through the step 52. The edge of the second long side 107 of the display back panel 101 has undergone a first bend through a bending process, bending downwards by 90°. The side top block 51 folds the first bent edge inwards by 90°, thereby flattening the edge of the second long side 107 inwards.

[0046] In order to reset the side top block 51, in this embodiment, refer to Figure 1 and Figure 3 A pin 56 is provided between the mounting block 53 and the side top block 51. The pin 56 is fixedly connected to the side top block 51. A third spring 57 is sleeved on the pin 56. The third spring 57 acts between the pin 56 and the mounting block 53.

[0047] Understandably, with this configuration, the mounting block 53 and the side top block 51 are connected by a pin 56, and the pin 56 is fixedly connected to the side top block 51. The third spring 57 is sleeved on the pin 56, with one end of the third spring 57 abutting against the end of the pin 56 and the other end abutting against the inside of the mounting block 53. When the upper mold and the lower mold are closed, the inserter 54 pushes the side top block 51 to move inward, and the side top block 51 drives the pin 56 to compress the third spring 57. When the mold is opened, the inserter 54 separates from the side top block 51, and the third spring 57 pushes the side top block 51 towards the mounting block 53 through the pin 56, so that the side top block 51 is reset.

[0048] In order to fold the edge of the second long side 107 of the display back panel 101 inward, in this embodiment, reference is made to... Figure 1 and Figure 3 The side top block 51 is provided with a step 52 that matches the edge of the first stripper plate 16. When the upper mold and the lower mold are closed, there is a gap between the step 52 and the edge of the first stripper plate 16.

[0049] Understandably, with this configuration, the step 52 of the side top block 51 matches the edge of the first stripper plate 16. When the upper and lower molds are closed, there is a gap between the step 52 and the edge of the first stripper plate 16. The size of this gap is determined according to the thickness of the display back plate 101, which is twice the thickness of the display back plate 101. During the process of closing the upper and lower molds, the side top block pushes the edge of the second long side 107 of the display back plate 101 towards the direction of the second template 25 through the step 52, thereby flattening the edge of the second long side 107 inward.

[0050] It should be further explained that after the second bending, the display back panel 101 needs to be transferred to the next stamping die for a third bending, so that the edge of the display back panel 101 forms a C-shaped frame after three bendings. The one-piece frame of the display back panel 101 can greatly increase the structural strength of the display back panel 101.

[0051] In the working process of this application embodiment, the first mold base 13 of the upper mold drives the first template 15 and the first ejector plate 16 to move downward, gradually approaching and closing with the lower mold. During the mold closing process, the insert 54 interacts with the inclined surface 55 of the side top block 51, causing the side top block 51 to move towards the second template 25, folding the edge of the second long side 107 of the display back panel 101 inward. As the first mold base 13 continues to press down, the first ejector plate 16 and the second ejector plate 26 stamp and form the display back panel 101. At the same time, the stop plate 31 moves downward a certain distance relative to the first template 15. The stop plate 31 bends the edges of the first long side 106, the first short side 104 and the second short side 105 of the display back panel 101 downward to form the second bent part 103. The first bent part 102 that has been formed on the corresponding edge of the display back panel 101 moves into the relief groove 42 of the inclined slider 41. Then, during the mold opening process, the upper mold moves upward, and the ejector pin 43 is pushed by the force of the second spring 44 to move the inclined slider 41 obliquely upward along the inclined guide groove 45, thereby causing the clearance groove 42 to disengage from the first bending part 102. At the same time, after the side top block 51 is no longer subjected to the force of the upper mold insert 54, the third spring 57 helps the side top block 51 return to its initial position, preparing for the next stamping.

[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 secondary bending mold for the back panel bezel of a display, characterized in that, The device includes an upper mold and a lower mold. The upper mold includes a first mold base, a first template, and a first ejector plate arranged sequentially from top to bottom. The first template is movably installed on the lower side of the first mold base. The first ejector plate is fixed to the first template. A stop plate is provided on the outer side of the first ejector plate of the first mold base. The lower mold includes a second mold base, a second template, and a second ejector plate fixedly connected sequentially from bottom to top. An inclined slider is provided on the edge of the second template. The second template is movably connected to the inclined slider through an inclined guide groove. An ejector pin is provided on the second mold base along the mold opening direction. The ejector pin is connected to the inclined slider. When the mold is closed, the first ejector plate and the second ejector plate stamp and form the back panel of the display. The stop plate bends the edge of the back panel of the display downward to form a second bend. The first bend of the edge of the back panel of the display moves into the relief groove of the inclined slider. When the mold is opened, the ejector pin pushes the inclined slider to move obliquely upward along the inclined guide groove, causing the relief groove to disengage from the first bend.

2. The secondary bending die for the display back panel frame according to claim 1, characterized in that, The second template has multiple slanted sliders on the edges corresponding to the first short side, the second short side, and the first long side of the display back panel.

3. The secondary bending die for the display back panel frame according to claim 1, characterized in that, The first mold base is fixedly connected to the first support plate by multiple upper pads, and the lower side of the first mold base is fixedly connected to the stop plate by a first clamping plate. There is a gap between the first clamping plate and the first template.

4. The secondary bending die for the display back panel frame according to claim 3, characterized in that, A limiting bolt and a first spring are provided between the first clamping plate and the first template. The first clamping plate pulls the first template through the limiting bolt, and the first spring acts on the first mold base and the first template. The first template is installed on the lower side of the first clamping plate in a floating manner through the first spring and the limiting bolt.

5. The secondary bending die for the display back panel frame according to claim 1, characterized in that, The stop plate is provided with a bent arc surface that cooperates with the edge of the inclined slider, and the bent arc surface is arranged in the first release plate direction.

6. The secondary bending die for the display back panel frame according to claim 1, characterized in that, The second mold base is fixedly connected to the second support plate through multiple second pads, and the upper side of the second mold base is fixedly connected to the second template through a second pad.

7. The secondary bending die for the display back panel frame according to claim 1, characterized in that, The second mold base has a second spring on the lower side of the ejector pin.

8. The secondary bending die for the display back panel frame according to claim 1, characterized in that, The second template has a side top block on its outer side, and the side top block is connected to a mounting block. The mounting block is fixedly connected to the second pad. The first mold base has a downward-facing insert knife. The insert knife cooperates with the side top block through an inclined surface. When the upper mold and the lower mold are closed, the insert knife drives the side top block to move towards the second template so as to fold the edge of the second long side of the display back panel inward.

9. The secondary bending die for the display back panel frame according to claim 8, characterized in that, A pin is provided between the mounting block and the side top block. The pin is fixedly connected to the side top block. A third spring is sleeved on the pin, and the third spring acts between the pin and the mounting block.

10. The secondary bending die for the display back panel frame according to claim 8, characterized in that, The side top block is provided with a step that matches the first stripper edge. When the upper mold and the lower mold are closed, there is a gap between the step and the first stripper edge.

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