CN112794632A - 3D mobile phone glass cover plate forming die and forming method - Google Patents
3D mobile phone glass cover plate forming die and forming method Download PDFInfo
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- CN112794632A CN112794632A CN202011477243.6A CN202011477243A CN112794632A CN 112794632 A CN112794632 A CN 112794632A CN 202011477243 A CN202011477243 A CN 202011477243A CN 112794632 A CN112794632 A CN 112794632A
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- forming
- cover plate
- die
- groove
- glass cover
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/02—Re-forming glass sheets
- C03B23/023—Re-forming glass sheets by bending
- C03B23/03—Re-forming glass sheets by bending by press-bending between shaping moulds
Abstract
The invention relates to the technical field of mobile phone cover plate production, in particular to a mobile phone glass cover plate forming die and a mobile phone glass cover plate forming method. This cell-phone glass apron forming die includes: the bottom die is provided with a first forming groove; the first molding assembly is in concave-convex fit with the first molding groove, a first molding surface and a second molding surface are arranged on one side, close to the first molding groove, of the first molding assembly, the first molding surface is in concave-convex fit with the side wall of the first molding groove, and the second molding surface is located outside the first molding groove; the second forming part is provided with a second forming groove, and the second forming groove is in concave-convex fit with the second forming surface. By the invention, the gap between the hot bending product and the die can be reduced, the bending angle of the hot bending product can be more than 90 degrees, and the precision of the hot bending product can be improved.
Description
Technical Field
The invention relates to the technical field of mobile phone cover plate production, in particular to a mobile phone glass cover plate forming die and a mobile phone glass cover plate forming method.
Background
With the coming of the 5G era, 3D glass products are continuously produced on smart phones, wearable watches, vehicle-mounted glass and the like, the 3D glass products are more and more widely applied, and with the fact that the screen occupation ratio of the smart phone screen is higher and higher by the public, the hot bending is widely used as the core process of the 3D glass products.
The existing mobile phone glass cover plate forming die generally adopts a graphite die, and due to the characteristics of the graphite die and a glass material, the 3D mobile phone glass cover plate with the hot bending angle smaller than 90 degrees can be produced only by the die in the prior art, when the 3D mobile phone glass cover plate with the hot bending angle larger than 90 degrees is produced, the hot bent glass can be taken out of the die only by a very large gap between a hot bent product and the graphite die, and the hot bent product can be verified by the die for many times to ensure the size and the contour tolerance within a certain range, so that the consumption cost is high, and the yield is low.
Disclosure of Invention
The invention aims to provide a die structure which can be used for producing a 3D glass cover plate with a hot bending angle larger than 90 degrees, and has small clearance between a hot bending product and a die and high production precision.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a mobile phone glass cover plate forming die comprises:
the bottom die is provided with a first forming groove;
the top die is in concave-convex fit with the bottom die;
the first forming assembly is clamped and arranged on the top die and is in concave-convex fit with the first forming groove, a first forming surface and a second forming surface are arranged on one side, close to the first forming groove, of the first forming assembly, the first forming surface is in concave-convex fit with the side wall of the first forming groove, and the second forming surface is located outside the first forming groove;
the second forming piece is in plug-in fit with the top die and is provided with a second forming groove, and the second forming groove is in concave-convex fit with the second forming surface.
Further, the first molding assembly includes:
the bottom end of the first insert is abutted and matched with the bottom of the first forming groove;
the second mold inserts are respectively arranged on two opposite sides of the first mold insert in a butt joint mode, the bottom ends of the second mold inserts are in butt joint with the bottom of the first forming groove, the first forming surface is arranged on one side, away from the first mold insert, of the second mold insert, and the clamping groove in clamping joint matching with the top mold is arranged on one side, away from the first mold insert, of the second mold insert.
Further, the width of the first insert is gradually reduced from the bottom end to the bottom end.
Further, the second mold insert comprises a molding part in concave-convex fit with the first molding groove and a clamping part arranged at the top end of the molding part, and the clamping groove is located at one end, far away from the first mold insert, of the clamping part; the bottom die is provided with a first mounting hole in concave-convex fit with the first insert, two sides of the first mounting hole in the width direction are respectively provided with a second mounting hole communicated with the first mounting hole, and one side of the second mounting hole, far away from the first mounting hole, is provided with a clamping block in concave-convex fit with the clamping groove.
Furthermore, the opposite side walls of the first mounting hole are respectively provided with a yielding groove.
Further, 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.
Furthermore, third mounting holes are formed in the top die and located on two sides of the width direction of the first mounting hole respectively, and the second forming piece is matched with the third mounting holes in an inserted mode.
Furthermore, the bottom die is provided with a positioning groove which is in concave-convex fit with the second forming piece, and the positioning groove is communicated with the first forming groove.
In order to overcome the defects of the prior art, the invention also provides a mobile phone glass cover plate forming method, which aims to solve the problem that the existing production process is difficult to process products with the hot bending angle smaller than 90 degrees.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a method for forming a glass cover plate of a mobile phone comprises the following steps:
s1, hot-bending the glass cover plate into a glass cover plate with an edge bending angle of 90 degrees by adopting a one-step forming die;
s2, placing the glass cover plate on a bottom die of a forming die, and limiting the glass cover plate through the first forming groove;
s3, closing the bottom die and the top die, and installing the first molding assembly and the second molding assembly on the top die;
s4, heating the mould structure and the glass cover plate;
s5, clamping the second forming piece to enable the second forming groove to be matched with the second forming surface in a concave-convex mode
And S6, cooling the mold structure to room temperature, and demoulding the bottom mold and the top mold to obtain the hot-bent product.
Further, in step S3, the mold structure and the glass cover plate are heated to the glass transition point temperature of the glass cover plate.
The invention has the beneficial effects that: the bottom and the side wall of the first forming groove are smoothly connected, when the first forming assembly is subjected to hot press forming, the first forming assembly is firstly subjected to mold closing to enable the first forming surface to be in concave-convex fit with the side wall of the first forming groove, so that the glass cover plate is formed in one step, then the second forming assembly is subjected to mold closing to enable the second forming groove to be in concave-convex fit with the second forming surface, so that the glass cover plate is formed in a second step, and the bending angle can be larger than 90 degrees; the invention can reduce the clearance between the hot bending product and the die and improve the precision of the hot bending product.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic structural diagram of a mold for molding a cover plate of a mobile phone according to an embodiment of the present invention;
FIG. 2 is a structural exploded view of a molding die for a glass cover plate of the mobile phone in FIG. 1;
FIG. 3 is a top view of the mold for molding the cover plate of the mobile phone of the present embodiment;
FIG. 4 is a cross-sectional view taken along the plane A-A in FIG. 3;
FIG. 5 is a sectional view of a mold for molding a cover plate of a mobile phone according to the embodiment;
FIG. 6 is a schematic view of a cover plate structure of a mobile phone;
fig. 7 is a partial structure schematic diagram of the cover glass of the mobile phone.
In the figure, 100, a bottom die; 110. a first forming groove; 120. positioning a groove; 200. carrying out top die; 210. A first mounting hole; 211. a yielding groove; 220. a second mounting hole; 221. a clamping block; 230. a third mounting hole; 300. a first molding assembly; 310. a first insert; 320. a second insert; 321. A first molding surface; 322. a first molding surface; 323. a molding section; 324. a clamping part; 325. A card slot; 400. a second molding member; 420. a second forming groove; 500. a glass cover plate;
Detailed Description
The concept, specific structure, and technical effects of the present invention will be described clearly and completely with reference to the following embodiments and the accompanying drawings to fully understand the objects, features, and effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention. In addition, all the connection/connection relations referred to in the patent do not mean that the components are directly connected, but mean that a better connection structure can be formed by adding or reducing connection accessories according to specific implementation conditions. All technical characteristics in the invention can be interactively combined on the premise of not conflicting with each other.
Referring to fig. 6 and 7, the glass bending angle or hot bending angle in the present embodiment refers to an angle between a tangent j of the peripheral edge of the glass and a horizontal plane, and the angle is a. The mobile phone glass cover plate forming mold of the embodiment is actually a secondary forming mold of a glass cover plate, before the forming mold of the invention is used, the existing primary forming mold is needed to be adopted to firstly heat-bend glass into the glass cover plate with the thermal bend angle of 90 degrees, and then the forming mold of the invention is adopted to further heat-bend the glass cover plate into the 3D mobile phone glass cover plate with the thermal bend angle of 163-plus 173 degrees. The specific structure of the mobile phone glass cover plate forming die is as follows.
Referring to fig. 1 to 5, a mobile phone glass cover plate forming mold includes:
a bottom die 100, wherein the bottom die 100 is provided with a first forming groove 110;
a top mold 200 that is concave-convex fitted to the bottom mold 100;
the first molding assembly 300 is clamped and arranged on the top die 200, the first molding assembly 300 is in concave-convex fit with the first molding groove 110, a first molding surface 321 and a second molding surface 322 are arranged on one side, close to the first molding groove 110, of the first molding assembly 300, the first molding surface 321 is in concave-convex fit with the side wall of the first molding groove 110, and the second molding surface 322 is located outside the first molding groove 110;
and a second molding member 400 insert-fitted into the top mold 200, the second molding member 400 being provided with a second molding groove 420, the second molding groove 420 being concavo-convex fitted with the second molding surface 322.
In this embodiment, the bottom and the side wall of the first forming groove 110 are smoothly connected, when performing hot press forming, a glass cover plate with a one-step forming hot bending angle of 90 degrees is placed into the first forming groove 110, then the first forming assembly 300 and the top mold 200 are closed with the bottom mold 100, so that the first forming surface 321 is in concave-convex fit with the side wall of the first forming groove 110, the glass cover plate 500 is positioned, then the second forming assembly 400 is closed so that the second forming groove 420 is in concave-convex fit with the second forming surface 322, so that the glass cover plate 500 is formed for the second time, and the hot bending angle of the formed glass cover plate is 163 and 173 degrees.
As shown in fig. 1 to 5, the first molding assembly 300 includes a first insert 310 and second inserts 320 respectively disposed on two opposite sides of the first insert 310, and a bottom end of the first insert 310 is in abutting engagement with a bottom of the first molding groove 110; the bottom end of the second insert 320 is abutted against and matched with the bottom of the first forming groove 110, a first forming surface 321 is arranged on one side of the second insert 320 far away from the first insert 310, and a clamping groove 325 for clamping and matching the top die 200 is arranged on one side of the second insert 320 far away from the first insert 310. This arrangement allows the first molding member 300 to be in full contact with the first molding groove 110, thereby reducing the gap between the first molding surface 321 and the first molding groove 110 and facilitating the removal of the mold.
Preferably, the width of the first insert 310 gradually decreases from the bottom end to the bottom end, the first insert 310 is large and small at the top end, similar to a wedge, and the first insert 310 presses the second insert 320 under the action of gravity during one-step molding, so that the first molding surface 321 can be sufficiently contacted with the glass cover plate 500, thereby improving the bending precision of the glass cover plate 500. During demolding, the second insert 320 may be conveniently removed.
Preferably, the second insert 320 includes a molding portion 323 that is in concave-convex fit with the first molding groove 110 and a clamping portion 324 that is disposed at a top end of the molding portion 323, and the clamping groove 325 is located at an end of the clamping portion 324 away from the first insert 310; the bottom die 100 is provided with a first mounting hole 210 which is in concave-convex fit with the first insert 310, two sides of the first mounting hole 210 in the width direction are respectively provided with a second mounting hole 220 communicated with the first mounting hole 210, and one side of the second mounting hole 220 far away from the first mounting hole 210 is provided with a clamping block 221 which is in concave-convex fit with the clamping groove 325. The first and second mounting holes 210 and 220 are provided to facilitate removal of the mold.
Preferably, in order to facilitate taking out the first insert 310, the opposite side walls of the first mounting hole 210 are respectively provided with a relief groove 211, in this embodiment, four relief grooves 211 are provided, so that a worker can conveniently grab the first insert 310.
In this embodiment, the first molding surface 321 and the second molding surface 322 are located on a side of the molding portion 323 away from the first insert 310, the first molding surface 321 and the second molding surface 322 are smoothly connected to form a circular arc, the glass cover plate 500 can form an inverted 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.
As shown in fig. 1 to 5, third mounting holes 230 are respectively formed on the top mold 200 at two sides of the first mounting hole 210 in the width direction, and the second molding member 400 is inserted into and fitted into the third mounting holes 230. Specifically, the cross section of the second molding member 400 is L-shaped, the second molding member 400 is in concave-convex fit with the third mounting hole 230, and the second molding member 400 is not easily separated from the third mounting hole 230 after being inserted into the third mounting hole 230.
Preferably, the bottom mold 100 is formed with a positioning groove 120 that is concave-convex engaged with the second molding member 400, and the positioning groove 120 is communicated with the first molding groove 110. Specifically, the distance between two positioning grooves 120 is equal to the original width of the glass cover plate 500, and the glass cover plate 500 can be positioned by the positioning grooves 120, so that the glass cover plate 500 can be conveniently placed on the bottom mold 100, and the glass cover plate 500 can be accurately attached to the first forming groove 110 during one-step forming. Before the secondary molding, the edge of the glass cover plate 500 is attached to 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 member 400 is inserted into the positioning groove 120, the groove surface of the second molding groove 420 is close to the edge of the glass cover plate 500, and the edge of the glass cover plate 500 is guided to be close to the second molding surface 322, so that the edge of the glass cover plate 500 is bent by less than 90 °.
The embodiment also discloses a method for forming the mobile phone glass cover plate 500, which comprises the following steps:
and S1, hot-bending the glass cover plate 500 into a glass cover plate with an edge bending angle of 90 degrees by adopting a one-step forming die.
S2, the glass cover 500 after the primary hot bending is placed on the bottom mold 100, and the glass cover 500 is limited by the first forming groove 110.
Specifically, the glass cover plate 500 is placed in the positioning groove 120 with the bent portion facing upward.
S3, the bottom mold 100 and the top mold 200 are closed, and the first molding assembly 300 and the second molding member 400 are mounted on the top mold 200.
Specifically, the top mold 200 is mounted to the bottom mold 100, the second inserts 320 are snapped onto the snap blocks 221, the first insert 310 is then snapped between the two second inserts 320, and then the second molding member 400 is mounted into the third mounting hole 230.
S4, the mold structure and the glass cover plate 500 are heated.
Specifically, the mold structure and the glass cover plate 500 are heated to the glass transition point temperature of the glass cover plate 500.
S5, the second molding member 400 is clamped so that the second molding groove 420 is engaged with the second molding surface 322 in a concave-convex manner.
Specifically, under the action of gravity, the second molding member 400 moves downward, and the groove surface of the second molding groove 420 contacts the glass cover plate 500 and causes the edge of the glass cover plate 500 to be attached to the second molding surface 322.
And S6, cooling the mold structure to room temperature, and demolding the bottom mold 100 and the top mold 200 to obtain the hot-bent product.
Specifically, after cooling, the first insert 310 is firstly drawn out, then the two second inserts 320 are pulled towards the middle to enable the two second inserts 320 to move towards the direction of mutual approaching, so that the two second inserts no longer press against the glass cover plate, then the bottom mold 100 is separated from the top mold 200, finally the formed glass cover plate is drawn out from the bottom of the top mold, and the formed 3D mobile phone glass cover plate is taken out.
To sum up, the bottom and the side wall of the first forming groove 110 are smoothly connected, when hot press forming is performed, the first forming assembly 300 is firstly closed to enable the first forming surface 321 to be in concave-convex fit with the side wall of the first forming groove 110, the glass cover plate 500 is positioned, then the second forming assembly 400 is closed to enable the second forming groove 420 to be in concave-convex fit with the second forming surface 322, and the glass cover plate 500 is secondarily formed, wherein the bending angle can be larger than 90 degrees; the invention can reduce the clearance between the hot bending product and the die and improve the precision of the hot bending product.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The utility model provides a cell-phone glass apron forming die which characterized in that: the method comprises the following steps:
the bottom die is provided with a first forming groove;
the top die is in concave-convex fit with the bottom die;
the first forming assembly is clamped and arranged on the top die and is in concave-convex fit with the first forming groove, a first forming surface and a second forming surface are arranged on one side, close to the first forming groove, of the first forming assembly, the first forming surface is in concave-convex fit with the side wall of the first forming groove, and the second forming surface is located outside the first forming groove;
and the second forming piece is in plug-in fit with the top die and is provided with a second forming groove which is in concave-convex fit with the second forming surface.
2. The mobile phone glass cover plate forming die of claim 1, wherein: the first molding assembly includes:
the bottom end of the first insert is in butt fit with the bottom of the first forming groove;
the second mold inserts are respectively arranged on two opposite sides of the first mold insert in a butt joint mode, the bottom ends of the second mold inserts are in butt joint with the bottom of the first forming groove, the first forming surface is arranged on one side, away from the first mold insert, of the second mold insert, and the clamping groove in clamping joint matching with the top mold is arranged on one side, away from the first mold insert, of the second mold insert.
3. The mobile phone glass cover plate forming die of claim 2, wherein: the width of the first insert is gradually reduced from the bottom end to the bottom end.
4. The mobile phone glass cover plate forming die of claim 3, wherein: the second insert comprises a forming part in concave-convex fit with the first forming groove and a clamping part arranged at the top end of the forming part, and the clamping groove is located at one end, far away from the first insert, of the clamping part; the bottom die is provided with a first mounting hole in concave-convex fit with the first insert, two sides of the first mounting hole in the width direction are respectively provided with a second mounting hole communicated with the first mounting hole, and one side of the second mounting hole, which is far away from the first mounting hole, is provided with a clamping block in concave-convex fit with the clamping groove.
5. The mobile phone glass cover plate forming die of claim 4, wherein: and the side walls opposite to the first mounting holes are respectively provided with a yielding groove.
6. The mobile phone glass cover plate forming die of claim 5, wherein: the first molding surface and the second molding surface are positioned on one side of the molding part far away from the first insert, and the first molding surface and the second molding surface are smoothly connected.
7. The mobile phone glass cover plate forming die of claim 6, wherein: and third mounting holes are respectively formed in the top die and positioned on two sides of the width direction of the first mounting hole, and the second forming piece is in inserted fit with the third mounting holes.
8. The mobile phone glass cover plate forming die of claim 7, wherein: and the bottom die is provided with a positioning groove which is in concave-convex fit with the second forming piece, and the positioning groove is communicated with the first forming groove.
9. A method for forming a mobile phone glass cover plate is characterized by comprising the following steps: the method comprises the following steps:
s1, hot-bending the glass cover plate into a glass cover plate with an edge bending angle of 90 degrees by adopting a one-step forming die;
s2, placing the glass cover plate on a bottom die of a forming die, and limiting the glass cover plate through the first forming groove;
s3, closing the bottom die and the top die, and installing the first molding assembly and the second molding assembly on the top die;
s4, heating the mould structure and the glass cover plate;
s5, clamping the second molding part to enable the second molding groove to be in concave-convex fit with the second molding part
And S6, cooling the mold structure to room temperature, and demolding the bottom mold and the top mold to obtain the hot-bent product.
10. The method for forming a cover plate of a mobile phone glass as claimed in claim 9, wherein: in step S3, the mold structure and glass cover plate are heated to the glass transition point temperature of the glass cover plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011477243.6A CN112794632A (en) | 2020-12-15 | 2020-12-15 | 3D mobile phone glass cover plate forming die and forming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011477243.6A CN112794632A (en) | 2020-12-15 | 2020-12-15 | 3D mobile phone glass cover plate forming die and forming method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112794632A true CN112794632A (en) | 2021-05-14 |
Family
ID=75806758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011477243.6A Pending CN112794632A (en) | 2020-12-15 | 2020-12-15 | 3D mobile phone glass cover plate forming die and forming method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112794632A (en) |
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2020
- 2020-12-15 CN CN202011477243.6A patent/CN112794632A/en active Pending
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