A secondary molding jig for 3D glass cover

Abstract

The technical field of the mobile phone glass cover molding jig of the present invention specifically relates to a secondary molding jig for a 3D glass cover, which includes an upper mold assembly and a lower mold assembly; the lower mold assembly includes a concave mold core, two shaping slide blocks and a driving member; the upper surface of the concave mold core is provided with a secondary positioning groove for placing 3D glass, and the two shaping slide blocks are respectively slidably arranged on both sides of the width direction of the secondary positioning groove, and the driving member is used to drive the two shaping slide blocks to move in a direction close to or away from each other, and the side of the shaping slide block close to the secondary positioning groove is a secondary shaping surface, and the angle between the secondary shaping surface and the bottom of the positioning groove is less than 90°; the upper mold assembly includes a convex mold core, and the lower surface of the convex mold core is provided with a convex mold core that is concave and convexly matched with the secondary positioning groove, and the side of the convex mold core close to the shaping slide block is parallel to the secondary shaping surface. When the 3D glass cover is subjected to secondary molding, the straight position of both sides of the 3D glass cover can be made less than 90°.

Description

Technical Field

[0001] The present invention relates to the technical field of mobile phone glass cover plate forming jigs, and in particular to a secondary forming jig for a 3D glass cover plate. Background Art

[0002] At present, the glass cover plates used in electronic products include 2D, 2.5D and 3D glass. Among them, 2D glass is flat glass, 2.5D glass is 2D flat glass with curved edges. 3D curved glass can be designed with curved arcs in the middle and edges.

[0003] With the development of science and technology, 3D glass cover plates are widely used. During the production of 3D glass cover plates, jigs and heating equipment are required to be used to heat-bend the glass cover plates. According to research, in order to make the 3D glass cover plate connect with the middle frame of the fuselage at 180°, the two long sides of the 3D glass cover plate need to be heat-bent to an angle less than 90° with the surface of the 3D glass cover plate. However, after heat-bending by jigs in the prior art, the two long sides can generally only be bent to a 3D glass cover plate with an angle greater than or equal to 90° with the surface of the 3D glass cover plate, which is difficult to meet the current technical requirements. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a secondary molding jig for a 3D glass cover plate, which can bend the two long sides of the 3D glass cover plate to an angle less than 90° with the surface of the 3D glass cover plate during secondary molding of the 3D glass cover plate.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] A secondary molding jig for a 3D glass cover plate, comprising an upper mold component and a lower mold component;

[0007] The lower die assembly comprises a die core, two shaping slide blocks and a driving member;

[0008] The upper surface of the die core is provided with a secondary positioning groove for placing the 3D glass, and the two shaping sliders are respectively slidably arranged on both sides of the width direction of the secondary positioning groove, and the driving member is used to drive the two shaping sliders to move towards or away from each other, and the side of the shaping slider close to the secondary positioning groove is a secondary shaping surface, and the angle between the secondary shaping surface and the bottom of the positioning groove is less than 90°;

[0009] The upper mold assembly comprises a punch core, the lower surface of which is provided with a punch core which is concavely and convexly matched with the secondary positioning groove, and the side surface of the punch core close to the molding slide block is parallel to the secondary molding surface.

[0010] Wherein, an arc-shaped guide section is provided on one side of the secondary shaping surface close to the bottom of the secondary positioning groove.

[0011] Wherein, the lower mold assembly also includes a lower mold fixing plate for carrying the female mold core, and the upper mold assembly also includes an upper mold fixing plate, and the male mold core is fixed on a side of the upper mold fixing plate close to the female mold core.

[0012] Wherein, the driving member is a cylinder, the side of the shaping slider away from the secondary positioning groove is connected to the driving member, each shaping slider is connected to two driving members at intervals, and the driving member is fixed on the lower mold fixing plate.

[0013] Wherein, two mutually parallel guide plates are respectively arranged on both sides of the upper surface of the die core in the length direction of the secondary positioning groove, and the two guide plates are slidably connected to the shaping slide block at one side close to the shaping slide block.

[0014] Among them, a blocking portion for blocking the shaping slider from moving in the direction of the secondary positioning groove is provided on one side of the guide plate close to the secondary positioning groove, and abutment portions for abutting against the baffle plate are respectively provided on both sides of the shaping slider close to the guide plate. When the abutment portions abut against the blocking portion, the side of the secondary shaping surface close to the bottom of the secondary positioning groove coincides with the side edge in the width direction of the secondary positioning groove.

[0015] Wherein, the lower mold fixing plate is provided with a limit block for preventing the shaping slide block from moving to a position away from the die core.

[0016] Wherein, a plurality of guide posts are arranged on the lower surface of the male mold core, and a plurality of guide grooves which are plugged and matched with the plurality of guide posts are opened on the upper surface of the female mold core.

[0017] Wherein, the die core and the punch core are both rectangular, a plurality of guide posts are respectively arranged at four right angles of the punch core, and a plurality of guide grooves are respectively arranged at four right angles of the die core.

[0018] Among them, the lower mold fixing plate is provided with a lower give way groove, and the lower give way groove is set at a side opening away from the die core, and the upper mold fixing plate is provided with an upper give way groove, and the upper give way groove corresponds to the lower give way groove.

[0019] The beneficial effects of the present invention are:

[0020] The present invention provides a driving member and a shaping slider, which can not only make the angle between the two long sides of the 3D glass after hot bending and the 3D glass surface less than 90°, but also drive the shaping slider to move away from the 3D glass cover plate through the driving member after hot bending, so that the 3D glass cover plate can be quickly taken out of the secondary molding jig, and the two bent sides will not be scratched, which can shorten the polishing time of the 3D glass in the later stage, improve the molding efficiency, and have higher precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figure 1 It is a schematic diagram of the structure of a 3D glass cover;

[0023] Figure 2 yes Figure 1 The enlarged schematic diagram of the middle A part;

[0024] Figure 3 is a schematic structural diagram of a lower mold assembly according to an embodiment of the present invention;

[0025] Figure 4 yes Figure 3 The enlarged schematic diagram of the middle B part;

[0026] Figure 5 is a schematic structural diagram of an upper mold assembly according to an embodiment of the present invention;

[0027] Figure 6 yes Figure 5 The enlarged schematic diagram of the middle C part;

[0028] Figure 7 It is a schematic diagram of the structure after the upper mold assembly and the lower mold assembly of an embodiment of the present invention are combined.

[0029] Explanation of the reference numerals in the accompanying drawings: 1. die core; 11. secondary positioning groove; 12. guide groove; 2. shaping slide block; 21. secondary shaping surface; 22. arc-shaped guide section; 23. abutment portion; 3. driving member; 4. punch core; 41. punch core; 42. arc-shaped pressing section; 5. lower die fixing plate; 51. lower clearance groove; 6. upper die fixing plate; 61. upper clearance groove; 7. guide plate; 71. blocking portion; 8. limit block; 9. guide column. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the concept, specific structure and technical effects of the present invention in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the present invention. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the invention can be combined interchangeably without conflicting with each other.

[0031] When the 3D glass cover is hot-bent, in order to make the 3D glass cover fully embedded in the fuselage when assembled with the fuselage, so that there is no assembly gap between the assembled glass cover and the fuselage, and the 3D glass cover can be smoothly connected with the middle frame of the fuselage at 180°, it is necessary to bend both sides of the 3D glass to an angle β less than 90° with the 3D glass surface. In order to bend both sides of the 3D glass to an angle β less than 90° with the 3D glass surface, the glass needs to be hot-bent twice. The bending angle α of the two long sides of the 3D glass after the first hot-bending is 90°. In order to bend the two long sides of the 3D glass to an angle β less than 90° with the 3D glass surface, specifically, Figure 1-2 As shown, in this embodiment, the angle β is 85°. The present invention discloses a secondary molding jig for a 3D glass cover plate, and its specific structure is as follows.

[0032] A secondary molding jig for a 3D glass cover plate includes an upper mold component and a lower mold component. Figure 3 The lower die assembly comprises a die core 1, two shaping slide blocks 2 and a driving member 3.

[0033] like Figure 3 As shown, the upper surface of the die core 1 is provided with a secondary positioning groove 11 for placing 3D glass, and the two shaping slide blocks 2 are respectively slidably arranged on the upper surface of the die core 1 and close to the two sides of the width direction of the secondary positioning groove 11, and the driving member 3 is used to drive the two shaping slide blocks 2 to move towards or away from each other, and the side of the shaping slide block 2 close to the secondary positioning groove 11 is a secondary shaping surface 21, and the angle θ between the secondary shaping surface 21 and the bottom of the secondary positioning groove 11 is less than 90°. Specifically, in this embodiment, θ is 85°.

[0034] like Figure 5 As shown, the upper mold assembly includes a punch core 4, the lower surface of which is provided with a punch core 41 that is concavely and convexly matched with the secondary positioning groove 11, and the side of the punch core 41 close to the molding slide block 2 is parallel to the secondary molding surface 21.

[0035] When in use, the 3D glass that has undergone the first hot bending is placed on the female mold core 1, with the two sides of the 3D glass bent facing upwards. The upper mold assembly is then combined with the lower mold assembly to make the convex mold core 41 of the convex mold core 4 press against the surface of the 3D glass. At this time, the two long sides of the 3D glass are located between the side surfaces in the width direction of the convex mold core 41 and the secondary molding surface 21. The secondary molding jig is then heated by a heating device, and the secondary molding jig transfers heat to the 3D glass. The driving member 3 is then started to make the molding sliders 2 on the upper surface of the female mold core 1 move toward each other under the drive of the driving member 3, so that the two molding sliders 2 are respectively pressed against the two long sides of the 3D glass cover plate, thereby making the two long sides press against the two long sides under the pressing pressure of the molding sliders 2 and the external pressure. Under the heating action of the thermal equipment, the 3D glass is bent and deformed in the direction of approaching each other. Since the angle between the secondary molding surface 21 of the molding slide 2 and the bottom of the secondary positioning groove 11 is less than 90°, and the side of the punch core 41 close to the molding slide 2 is parallel to the secondary molding surface 21, when the two long sides of the 3D glass are bent by the molding slide 2 and high temperature until the long sides of the 3D glass are tightly clamped between the side of the punch core 41 and the secondary molding surface 21, the angle between the two long sides of the 3D glass and the surface of the 3D glass is less than 90°, completing the second hot bending molding of the 3D glass. At this time, the two molding slides 2 are driven by the driving member 3 to move in the direction away from each other, and then the upper mold assembly is opened to take out the 3D glass cover after the secondary molding.

[0036] In summary, the present invention, by providing a driving member 3 and a shaping slider 2, can not only make the angle between the two long sides of the 3D glass after hot bending and the 3D glass surface less than 90°, but also drive the shaping slider 2 to move away from the 3D glass cover plate through the driving member 3 after hot bending, so that the 3D glass cover plate can be quickly taken out of the secondary molding jig, and the two bent sides will not be scratched, which can shorten the later polishing time of the 3D glass, improve the molding efficiency, and have higher precision.

[0037] Among them, Figure 4 As shown, the secondary shaping surface 21 is provided with an arc-shaped guide section 22 on one side close to the bottom of the secondary positioning groove 11. On the one hand, it guides the bending direction of the 3D glass. On the other hand, after the 3D glass is hot-bent, the bending part presents an arc-shaped surface, which is beneficial to improve the hand feel during use.

[0038] Further, such as Figure 6 As shown, the side of the male mold core 41 close to the arc guide section 22 is provided with an arc pressing section 42 that is concavely matched with the arc guide section 22, which is beneficial to cooperate with the arc guide section 22 to guide the bending direction of the side of the 3D glass, and is beneficial to improving the accuracy of the 3D glass after molding.

[0039] Among them, Figure 3 and Figure 5 As shown, the lower mold assembly also includes a lower mold fixing plate 5 for supporting the female mold core 1, and the upper mold assembly also includes an upper mold fixing plate 6, and the male mold core 4 is fixed on a side of the upper mold fixing plate 6 close to the female mold core 1.

[0040] By setting the lower mold fixing plate 5 and the upper mold fixing plate 6, when in use, the female mold core 1 can be fixed on the working platform through the lower mold fixing plate 5, and the male mold core 4 can be fixed on the robot through the upper mold fixing plate 6, so that the upper mold assembly and the lower mold assembly can be automatically combined to perform secondary molding on the 3D glass cover plate, and the fixing structure can be prevented from directly acting on the female mold core 1 and the male mold core 4, which is beneficial to protecting the female mold core 1 and the male mold core 4 and improving their accuracy.

[0041] Among them, Figure 3 As shown, the driving member 3 is a cylinder, the side of the shaping slider 2 away from the secondary positioning groove 11 is connected to the driving member 3, each shaping slider 2 is connected to two driving members 3 at intervals, and the driving member 3 is fixed on the lower mold fixing plate 5.

[0042] Each shaping slider 2 is connected to two driving parts 3 at intervals, which can prevent the shaping slider 2 from being offset during movement, resulting in errors between the bending direction and bending angle of the two long sides of the 3D glass cover plate after secondary molding and the preset direction and angle. This is more conducive to improving the accuracy of the 3D glass cover plate after secondary molding, improving the yield and production efficiency, and also helping to improve the stability of the movement of the shaping slider 2.

[0043] Among them, Figure 3 As shown, two parallel guide plates 7 are respectively provided on both sides of the secondary positioning groove 11 on the upper surface of the die core 1 in the length direction, and the two guide plates 7 are slidably connected to the shaping slide block 2 at one side close to the shaping slide block 2 .

[0044] The setting of the guide plate 7 guides the movement of the shaping slider 2, further preventing the shaping slider 2 from shifting in direction during movement. Therefore, the setting of the guide plate 7 is beneficial to further improve the accuracy of the 3D glass cover after secondary molding, thereby further improving the yield and production efficiency.

[0045] Among them, combined Figure 4As shown, a baffle 71 for blocking the shaping slider 2 from moving in the direction of the secondary positioning groove 11 is provided on one side of the guide plate 7 close to the secondary positioning groove 11, and abutment portions 23 for abutting against the baffle plate are provided on both sides of the shaping slider 2 close to the guide plate 7. When the abutment portions 23 abut against the baffle 71, the side of the secondary shaping surface 21 close to the bottom of the secondary positioning groove 11 coincides with the side edge in the width direction of the secondary positioning groove 11. The provision of the baffle 71 and the abutment 23 limits the sliding of the shaping slider 2, so that the shaping slider 2 will not excessively press the 3D glass cover plate to cause excessive bending of the 3D glass cover plate, which is conducive to improving the molding accuracy of the 3D glass cover plate.

[0046] In order to prevent the shaping slide block 2 from being separated from the die core 1 and being crushed by the upper die assembly when the upper die assembly and the lower die assembly are merged, the lower die fixing plate 5 is provided with a limit block 8 for preventing the shaping slide block 2 from moving to a position away from the die core 1.

[0047] Among them, Figure 3 , Figure 5 and Figure 7 As shown, the lower surface of the male mold core 4 is provided with a plurality of guide posts 9, and the upper surface of the female mold core 1 is provided with a plurality of guide grooves 12 that are plugged and matched with the plurality of guide posts 9. The provision of the guide grooves 12 and the guide posts 9 enables the staff to quickly and accurately merge the upper mold assembly and the lower mold assembly, thereby improving the work efficiency. On the other hand, during the hot bending forming process, the upper mold assembly and the lower mold assembly are not easily misaligned, which is beneficial to improving the accuracy of the 3D glass cover after secondary forming.

[0048] The die core 1 and the punch core 4 are both rectangular, the plurality of guide posts 9 are respectively arranged at four right angles of the punch core 4 , and the plurality of guide grooves 12 are respectively arranged at four right angles of the die core 1 .

[0049] Among them, Figure 3 and Figure 5 As shown, in order to facilitate the separation of the upper die fixing plate 6 and the lower die fixing plate 5, the lower die fixing plate 5 is provided with a lower clearance groove 51, and the lower clearance groove 51 is set at a side opening away from the die core 1, and the upper die fixing plate 6 is provided with an upper clearance groove 61, and the upper clearance groove 61 corresponds to the lower clearance groove 51. When it is necessary to separate the upper die fixing plate 6 and the lower die fixing plate 5, the upper die fixing plate 6 can be opened from the lower die fixing plate 5 through the gap formed by the upper clearance groove 61 and the lower clearance groove 51, which is conducive to improving the disassembly efficiency.

[0050] The above is a specific description of the preferred implementation of the present invention, but the invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A secondary molding jig for a 3D glass cover plate, characterized in that: It includes an upper mold assembly and a lower mold assembly; The lower die assembly comprises a die core, two shaping slide blocks and a driving member; The upper surface of the concave mold core is provided with a secondary positioning groove for placing the 3D glass, and the two shaping sliders are respectively slidably arranged on both sides of the upper surface of the concave mold core close to the width direction of the secondary positioning groove, and the driving member is used to drive the two shaping sliders to move in a direction close to or away from each other, and the side of the shaping slider close to the secondary positioning groove is a secondary shaping surface, and the angle between the secondary shaping surface and the bottom of the secondary positioning groove is less than 90°; The upper mold assembly comprises a convex mold core, the lower surface of which is provided with a convex mold core adapted to the secondary positioning groove, and the side of the convex mold core close to the shaping slide block is parallel to the secondary shaping surface; The secondary shaping surface is provided with an arc-shaped guide section on one side close to the bottom of the secondary positioning groove, and the punch core is provided with an arc-shaped pressing section that matches the arc-shaped guide section on one side close to the arc-shaped guide section; Two guide plates parallel to each other are respectively arranged on both sides of the upper surface of the die core in the length direction of the secondary positioning groove, and the two guide plates are slidably connected to the shaping slide block at one side close to the shaping slide block; The guide plate is provided with a blocking portion on one side close to the secondary positioning groove for blocking the shaping slider from moving in the direction of the secondary positioning groove, and the shaping slider is provided with abutting portions on both sides close to the guide plate for abutting against the blocking portion. When the abutting portions abut against the blocking portions, the side of the secondary shaping surface close to the bottom of the secondary positioning groove coincides with the side edge in the width direction of the secondary positioning groove.

2. The secondary molding jig for a 3D glass cover according to claim 1, characterized in that: The lower mold assembly also includes a lower mold fixing plate for carrying the female mold core, and the upper mold assembly also includes an upper mold fixing plate. The male mold core is fixed on a side of the upper mold fixing plate close to the female mold core.

3. The secondary molding jig for a 3D glass cover according to claim 1, characterized in that: The driving member is a cylinder, the side of the shaping slide block away from the secondary positioning groove is connected to the driving member, each shaping slide block is connected to two driving members at intervals, and the driving member is fixed on the lower mold fixing plate.

4. The secondary molding jig for a 3D glass cover according to claim 2, characterized in that: The lower die fixing plate is provided with a limiting block for preventing the shaping slide block from moving to a position away from the die core.

5. The secondary molding jig for a 3D glass cover according to claim 1, characterized in that: A plurality of guide posts are arranged on the lower surface of the male mold core, and a plurality of guide grooves which are plugged and matched with the plurality of guide posts are opened on the upper surface of the female mold core.

6. The secondary molding jig for a 3D glass cover according to claim 5, characterized in that: The die core and the punch core are both rectangular, a plurality of guide posts are respectively arranged at four right angles of the punch core, and a plurality of guide grooves are respectively arranged at four right angles of the die core.

7. The secondary molding jig for a 3D glass cover according to claim 2, characterized in that: The lower die fixing plate is provided with a lower easing groove, which is opened on one side away from the die core, and the upper die fixing plate is provided with an upper easing groove, which corresponds to the lower easing groove.

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