A 3D mobile phone glass cover plate forming mold and forming method

Abstract

The present invention relates to the technical field of mobile phone cover production, and more specifically to a mobile phone glass cover forming mold and forming method. The mobile phone glass cover forming mold comprises: a bottom mold, a top mold that matches the bottom mold concavely and convexly, and a second forming piece that is plugged into the top mold, the bottom mold is provided with a first forming groove; the first forming component matches the first forming groove concavely and convexly, the first forming component is provided with a first forming surface and a second forming surface on the side close to the first forming groove, the first forming surface matches the side wall of the first forming groove concavely and convexly, and the second forming surface is located outside the first forming groove; the second forming piece is provided with a second forming groove, and the second forming groove matches the second forming surface concavely and convexly. Through the present invention, the gap between the hot-bending product and the mold can be reduced, the bending angle of the hot-bending product can be greater than 90°, and the precision of the hot-bending product can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of mobile phone cover plate production, and more specifically to a mobile phone glass cover plate forming mold and a forming method. Background Art

[0002] With the advent of the 5G era, 3D glass products have appeared in smartphones, wearable watches, and car glass. The application of 3D glass products is becoming more and more extensive. As the public's requirements for the screen-to-body ratio of smartphones are getting higher and higher, hot bending is widely used as the core process of 3D glass products.

[0003] Existing mobile phone glass cover molding molds generally use graphite molds. Due to the characteristics of graphite molds and glass materials, the existing technology can generally only use molds to produce 3D mobile phone glass cover plates with a thermal bending angle of less than 90 degrees. When producing 3D mobile phone glass cover plates with a thermal bending angle greater than 90 degrees, a large gap needs to be left between the thermally bent product and the graphite mold in order to remove the bent glass from the mold. In addition, the thermally bent product needs to undergo multiple mold verifications to ensure size and contour tolerances within a certain range, resulting in high costs and low yields. Summary of the invention

[0004] One object of the present invention is to provide a mold structure that can be used to produce a 3D glass cover plate with a heat bending angle greater than 90 degrees, with a small gap between the heat-bent product and the mold and high production precision.

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

[0006] A mobile phone glass cover plate forming mold, comprising:

[0007] A bottom mold, wherein the bottom mold is provided with a first molding groove;

[0008] A top mold that matches the bottom mold concavely and convexly;

[0009] A first molding component clamped to the top mold, the first molding component is matched with the first molding groove in a concave-convex manner, a first molding surface and a second molding surface are provided on a side of the first molding component close to the first molding groove, the first molding surface is matched with the side wall of the first molding groove in a concave-convex manner, and the second molding surface is located outside the first molding groove;

[0010] A second molding piece is plugged into and matched with the top mold, wherein the second molding piece is provided with a second molding groove, and the second molding groove is concave-convexly matched with the second molding surface.

[0011] Furthermore, the first molding component comprises:

[0012] A first insert, wherein the bottom end of the first insert is in abutment with the bottom of the first molding groove;

[0013] A second insert is respectively abutted against the opposite sides of the first insert, the bottom end of the second insert is abutted against the bottom of the first molding groove, the first molding surface is arranged on the side of the second insert away from the first insert, and a slot for clamping the top mold is arranged on the side of the second insert away from the first insert.

[0014] Furthermore, the width of the first insert gradually decreases from the bottom end to the lower end.

[0015] Furthermore, the second insert includes a molding portion that fits concavely and convexly with the first molding groove and a clamping portion arranged at the top of the molding portion, and the clamping groove is located at the end of the clamping portion away from the first insert; the bottom mold is provided with a first mounting hole that fits concavely and convexly with the first insert, and second mounting holes that communicate with the first mounting hole are respectively provided on both sides of the width direction of the first mounting hole, and a clamping block that fits concavely and convexly with the clamping groove is provided on the side of the second mounting hole away from the first mounting hole.

[0016] Furthermore, the side walls opposite to the first mounting hole are respectively provided with clearance grooves.

[0017] Furthermore, the first molding surface and the second molding surface are located on a side of the molding portion away from the first insert, and the first molding surface and the second molding surface are smoothly connected.

[0018] Furthermore, third mounting holes are respectively provided on the top mold and located on both sides of the first mounting hole in the width direction, and the second molded part is plugged and matched with the third mounting holes.

[0019] Furthermore, the bottom mold is provided with a positioning groove which is concave-convexly matched with the second molding part, and the positioning groove is communicated with the first molding groove.

[0020] In order to overcome the deficiencies of the prior art, the present invention also provides a method for forming a mobile phone glass cover plate, so as to solve the problem that the existing production process is difficult to process products with a thermal bending angle less than 90°.

[0021] The technical solution adopted by the present invention to solve the technical problem is:

[0022] A method for forming a mobile phone glass cover plate, comprising:

[0023] S1, using a one-time forming mold to heat-bend the glass cover plate into a glass cover plate with an edge bending angle of 90 degrees;

[0024] S2, placing the glass cover plate on the bottom mold of the molding mold, and limiting the glass cover plate by the first molding groove;

[0025] S3, closing the bottom mold and the top mold, and installing the first molding assembly and the second molding piece on the top mold;

[0026] S4, heating the mold structure and the glass cover plate;

[0027] S5, closing the mold of the second molded part so that the second molding groove and the second molding surface are matched with each other.

[0028] S6, cooling the mold structure to room temperature, demolding the bottom mold and the top mold to obtain a hot-bent product.

[0029] Further, in step S3, the mold structure and the glass cover plate are heated to a glass transition point temperature of the glass cover plate.

[0030] The beneficial effects of the present invention are as follows: the bottom and side wall of the first molding groove are smoothly connected. During hot pressing molding, the first molding component is first molded so that the first molding surface and the side wall of the first molding groove are matched concavely and convexly, so that the glass cover plate is molded once, and then the second molding component is molded so that the second molding groove and the second molding surface are matched concavely and convexly, so that the glass cover plate is molded twice, and the bending angle can be greater than 90°. Through the present invention, the gap between the hot-bent product and the mold can be reduced, and the accuracy of the hot-bent product can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0032] Figure 1 is a schematic structural diagram of the mobile phone glass cover molding die of this embodiment;

[0033] Figure 2 for Figure 1 The structural disassembly diagram of the glass cover molding mold for mobile phones;

[0034] Figure 3 is a top view of the mobile phone glass cover molding mold of this embodiment;

[0035] Figure 4 yes Figure 3 Sectional view of the AA plane;

[0036] Figure 5 is a cross-sectional view of the mobile phone glass cover molding die of this embodiment;

[0037] Figure 6 It is a schematic diagram of the structure of the mobile phone glass cover;

[0038] Figure 7 It is a partial structural diagram of a mobile phone glass cover.

[0039] In the figure, 100, bottom mold; 110, first molding groove; 120, positioning groove; 200, top mold; 210, first mounting hole; 211, clearance groove; 220, second mounting hole; 221, clamping block; 230, third mounting hole; 300, first molding component; 310, first insert; 320, second insert; 321, first molding surface; 322, first molding surface; 323, molding part; 324, clamping part; 325, clamping groove; 400, second molding part; 420, second molding groove; 500, glass cover; DETAILED DESCRIPTION

[0040] 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.

[0041] like Figure 6 and 7 , the glass bending angle or thermal bending angle described in this embodiment refers to the angle between the tangent line j of the outer peripheral edge of the glass and the horizontal plane, and the angle is A. The mobile phone glass cover plate forming mold of this embodiment is actually a secondary forming mold of the glass cover plate. Before using the forming mold of the present invention, it is necessary to use the existing primary forming mold to first thermally bend the glass into a glass cover plate with a thermal bending angle of 90 degrees, and then use the forming mold of the present invention to further thermally bend the glass cover plate into a 3D mobile phone glass cover plate with a thermal bending angle of 163-173 degrees. The specific structure of the mobile phone glass cover plate forming mold of the present invention is as follows.

[0042] Reference Figures 1 to 5 As shown, a mobile phone glass cover plate forming mold comprises:

[0043] A bottom mold 100, wherein the bottom mold 100 is provided with a first molding groove 110;

[0044] A top mold 200 that matches the bottom mold 100 in a concave-convex manner;

[0045] A first molding component 300 is clamped and arranged on the top mold 200, the first molding component 300 is matched with the first molding groove 110 in a concave-convex manner, and a first molding surface 321 and a second molding surface 322 are arranged on one side of the first molding component 300 close to the first molding groove 110, the first molding surface 321 is matched with the side wall of the first molding groove 110 in a concave-convex manner, and the second molding surface 322 is located outside the first molding groove 110;

[0046] The second molding member 400 is plugged into and matched with the top mold 200 . The second molding member 400 is provided with a second molding groove 420 . The second molding groove 420 is matched with the second molding surface 322 in a concave-convex manner.

[0047] In this embodiment, the bottom and side wall of the first molding groove 110 are smoothly connected. During hot pressing molding, the glass cover plate that has been molded once and has a heat bending angle of 90 degrees is placed in the first molding groove 110, and then the first molding component 300 and the top mold 200 are molded with the bottom mold 100 to make the first molding surface 321 and the side wall of the first molding groove 110 concave-convex fit, and the glass cover plate 500 is positioned, and then the second molding component 400 is molded to make the second molding groove 420 and the second molding surface 322 concave-convex fit, so that the glass cover plate 500 is molded for the second time, and the heat bending angle of the molded glass cover plate is 163-173 degrees.

[0048] like Figures 1 to 5 As shown, the first molding assembly 300 includes a first insert 310 and second inserts 320 respectively disposed on opposite sides of the first insert 310, the bottom end of the first insert 310 is in abutment with the bottom of the first molding groove 110; the bottom end of the second insert 320 is in abutment with the bottom of the first molding groove 110, the second insert 320 is provided with a first molding surface 321 on the side away from the first insert 310, and the second insert 320 is provided with a slot 325 for engaging with the top mold 200 on the side away from the first insert 310. This arrangement allows the first molding assembly 300 to fully contact the first molding groove 110, reduces the gap between the first molding surface 321 and the first molding groove 110, and also facilitates mold removal.

[0049] Preferably, the width of the first insert 310 gradually decreases from the bottom to the lower end, and the first insert 310 is larger at the top and smaller at the bottom, similar to a wedge. During one-time molding, the first insert 310 presses the second insert 320 under the action of gravity, so that the first molding surface 321 can fully contact the glass cover plate 500, thereby improving the bending accuracy of the glass cover plate 500. During demolding, the second insert 320 can be easily removed.

[0050] Preferably, the second insert 320 includes a molding part 323 that matches the first molding groove 110 in a concave-convex manner and a clamping part 324 that is arranged at the top of the molding part 323, and a clamping groove 325 is located at the end of the clamping part 324 that is away from the first insert 310; the bottom mold 100 is provided with a first mounting hole 210 that matches the first insert 310 in a concave-convex manner, and the first mounting hole 210 is provided with a second mounting hole 220 that communicates with the first mounting hole 210 on both sides of the width direction, and a clamping block 221 that matches the clamping groove 325 in a concave-convex manner is provided on the side of the second mounting hole 220 that is away from the first mounting hole 210. The arrangement of the first mounting hole 210 and the second mounting hole 220 can facilitate demoulding.

[0051] Preferably, in order to facilitate the removal of the first insert 310 , opposite side walls of the first mounting hole 210 are respectively provided with clearance grooves 211 . In this embodiment, four clearance grooves 211 are provided, which can facilitate workers to grab the first insert 310 .

[0052] In this embodiment, the first molding surface 321 and the second molding surface 322 are located on the side of the molding portion 323 away from the first insert 310, and the first molding surface 321 and the second molding surface 322 are smoothly connected to form an arc shape. The glass cover plate 500 can form an undercut edge after being bent along the first molding surface 321 and the second molding surface 322, and the edge of the molded glass cover plate 500 is smoother.

[0053] like Figures 1 to 5 As shown, third mounting holes 230 are respectively provided on the top mold 200 and on both sides of the first mounting hole 210 in the width direction, and the third mounting hole 230 is plugged with a second molded piece 400. Specifically, the cross section of the second molded piece 400 is L-shaped, and the second molded piece 400 is concavely matched with the third mounting hole 230. After the second molded piece 400 is inserted into the third mounting hole 230, it is not easy to be separated from the third mounting hole 230.

[0054] Preferably, the bottom mold 100 is provided with a positioning groove 120 that matches the second molding piece 400 in a concave-convex manner, and the positioning groove 120 is communicated with the first molding groove 110. Specifically, the distance between the two positioning grooves 120 is equal to the original width of the glass cover plate 500. By setting the positioning groove 120, the glass cover plate 500 can be positioned, and the glass cover plate 500 can be conveniently placed on the bottom mold 100. During the primary molding, the glass cover plate 500 can be accurately fitted with the first molding groove 110. Before the secondary molding, the edge of the glass cover plate 500 fits with the first molding surface 321, and a portion of the edge of the glass cover plate 500 is located in the positioning groove 120. At this time, the second molding piece 400 is inserted into the positioning groove 120, and the groove surface of the second molding groove 420 is close to the edge of the glass cover plate 500, guiding the edge of the glass cover plate 500 to be close to the second molding surface 322, so that the edge of the glass cover plate 500 is bent less than 90°.

[0055] This embodiment also discloses a method for forming a mobile phone glass cover plate 500, comprising:

[0056] S1, using a one-time molding mold to heat-bend the glass cover plate 500 into a glass cover plate with an edge bending angle of 90 degrees.

[0057] S2, placing the glass cover plate 500 after the first heat bending forming on the bottom mold 100, and limiting the position of the glass cover plate 500 by the first forming groove 110.

[0058] Specifically, the glass cover plate 500 is placed in the positioning groove 120 with the bent portion facing upward.

[0059] S3 , closing the bottom mold 100 and the top mold 200 , and installing the first molding component 300 and the second molding component 400 on the top mold 200 .

[0060] Specifically, the top mold 200 is installed on the bottom mold 100 , the second insert 320 is clamped on the clamping block 221 , and then the first insert 310 is clamped between the two second inserts 320 , and then the second molding 400 is installed in the third mounting hole 230 .

[0061] S4, heating the mold structure and the glass cover plate 500.

[0062] Specifically, the mold structure and the glass cover plate 500 are heated to a glass transition point temperature of the glass cover plate 500 .

[0063] S5, closing the mold of the second molded part 400 so that the second molding groove 420 and the second molding surface 322 are matched in a concave and convex manner.

[0064] Specifically, under the action of gravity, the second molding member 400 moves downward, the groove surface of the second molding groove 420 contacts the glass cover plate 500 , and the edge of the glass cover plate 500 is attached to the second molding surface 322 .

[0065] S6, cooling the mold structure to room temperature, demolding the bottom mold 100 and the top mold 200 to obtain a hot-bent product.

[0066] Specifically, after cooling, first pull out the first insert 310, then pull the two second inserts 320 toward the middle to make the two second inserts 320 move toward each other so that the two second inserts no longer press the glass cover plate, then separate the bottom mold 100 from the top mold 200, and finally pull the formed glass cover plate out from the bottom of the top mold to take out the formed 3D mobile phone glass cover plate.

[0067] In summary, the bottom and side wall of the first molding groove 110 are smoothly connected. During hot pressing molding, the first molding component 300 is first molded to make the first molding surface 321 and the side wall of the first molding groove 110 match each other concavely and convexly, and the glass cover plate 500 is positioned. Then, the second molding component 400 is molded to make the second molding groove 420 and the second molding surface 322 match each other concavely and convexly, and the glass cover plate 500 is molded for the second time. The bending angle can be greater than 90°. Through the present invention, the gap between the hot-bent product and the mold can be reduced, and the accuracy of the hot-bent product can be improved.

[0068] 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 mobile phone glass cover forming mold, characterized in that: include: A bottom mold, wherein the bottom mold is provided with a first molding groove; A top mold that matches the bottom mold concavely and convexly; A first molding component clamped to the top mold, the first molding component is matched with the first molding groove in a concave-convex manner, a first molding surface and a second molding surface are provided on a side of the first molding component close to the first molding groove, the first molding surface is matched with the side wall of the first molding groove in a concave-convex manner, and the second molding surface is located outside the first molding groove; A second molding piece plugged into the top mold, the second molding piece is provided with a second molding groove, and the second molding groove is concave-convexly matched with the second molding surface; The bottom mold is provided with a positioning groove which matches the second molding part in a concave-convex manner, and the positioning groove is communicated with the first molding groove.

2. A mobile phone glass cover plate forming mold according to claim 1, characterized in that: The first molding component comprises: A first insert, wherein the bottom end of the first insert is in abutment with the bottom of the first molding groove; A second insert is respectively abutted against the opposite sides of the first insert, the bottom end of the second insert is abutted against the bottom of the first molding groove, the first molding surface is arranged on the side of the second insert away from the first insert, and a slot for clamping the top mold is arranged on the side of the second insert away from the first insert.

3. A mobile phone glass cover forming mold according to claim 2, characterized in that: The width of the first insert gradually decreases from the bottom end to the lower end.

4. The mobile phone glass cover plate forming mold according to claim 3, characterized in that: The second insert includes a molding portion that matches the first molding groove in a concave-convex manner and a clamping portion arranged at the top of the molding portion, and the clamping groove is located at the end of the clamping portion away from the first insert; a first mounting hole that matches the first insert in a concave-convex manner is arranged on the bottom mold, and second mounting holes that communicate with the first mounting hole are respectively arranged on both sides of the width direction of the first mounting hole, and a clamping block that matches the clamping groove in a concave-convex manner is arranged on the side of the second mounting hole away from the first mounting hole.

5. The mobile phone glass cover plate forming mold according to claim 4, characterized in that: The side walls opposite to the first mounting hole are respectively provided with clearance grooves.

6. The mobile phone glass cover plate forming mold according to claim 5, characterized in that: The first molding surface and the second molding surface are located on a side of the molding portion away from the first insert, and the first molding surface and the second molding surface are smoothly connected.

7. A mobile phone glass cover forming mold according to claim 6, characterized in that: Third mounting holes are respectively provided on the top mold and on both sides of the first mounting hole in the width direction, and the second molded part is plugged and matched with the third mounting holes.

8. A method for forming a mobile phone glass cover plate, using the mobile phone glass cover plate forming mold according to claim 1, characterized in that: include: S1, using a one-time forming mold to heat-bend the glass cover plate into a glass cover plate with an edge bending angle of 90 degrees; S2, placing the glass cover plate on the bottom mold of the molding mold, and limiting the glass cover plate by the first molding groove, so that a portion of the edge of the glass cover plate is located in the positioning groove of the bottom mold; S3, closing the bottom mold and the top mold, and installing the first molding assembly and the second molding piece on the top mold; S4, heating the mold structure and the glass cover plate; S5, closing the mold of the second molding part so that the second molding groove and the second molding surface are matched with each other; S6, cooling the mold structure to room temperature, demolding the bottom mold and the top mold to obtain a hot-bent product.

9. A method for forming a mobile phone glass cover according to claim 8, characterized in that: In step S3, the mold structure and the glass cover plate are heated to a glass transition point temperature of the glass cover plate.

Images