CN108675618B - Manufacturing method of mobile terminal glass rear cover - Google Patents
Manufacturing method of mobile terminal glass rear cover Download PDFInfo
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- CN108675618B CN108675618B CN201810571601.6A CN201810571601A CN108675618B CN 108675618 B CN108675618 B CN 108675618B CN 201810571601 A CN201810571601 A CN 201810571601A CN 108675618 B CN108675618 B CN 108675618B
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- 239000011521 glass Substances 0.000 title claims abstract description 215
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 30
- 238000013003 hot bending Methods 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 23
- 238000003466 welding Methods 0.000 claims abstract description 19
- 239000011265 semifinished product Substances 0.000 claims abstract description 16
- 238000003754 machining Methods 0.000 claims abstract description 10
- 238000005498 polishing Methods 0.000 claims abstract description 10
- 230000000149 penetrating effect Effects 0.000 claims abstract description 7
- 239000000047 product Substances 0.000 claims abstract description 6
- 238000002360 preparation method Methods 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims description 74
- 238000003825 pressing Methods 0.000 claims description 19
- 238000001816 cooling Methods 0.000 claims description 3
- 239000006060 molten glass Substances 0.000 claims description 3
- 241001133184 Colletotrichum agaves Species 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000002844 melting Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000013011 mating Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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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
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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
- C03B23/20—Uniting glass pieces by fusing without substantial reshaping
- C03B23/203—Uniting glass sheets
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Signal Processing (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
The invention is suitable for the technical field of manufacturing of a mobile terminal glass rear cover, and discloses a method for manufacturing the mobile terminal glass rear cover, which comprises the following steps: a blank preparation step, namely preparing a glass plate blank and a glass block blank; a hot bending and welding step, namely placing the glass block blank and the glass plate blank in a mold to perform hot bending on the glass plate blank and weld the glass block blank to the glass plate blank to prepare a semi-finished glass rear cover product; and machining, namely machining a camera shooting avoiding hole penetrating through the glass block blank and the glass plate blank on the glass rear cover semi-finished product, and then grinding and polishing the glass rear cover semi-finished product provided with the camera shooting avoiding hole to obtain the glass rear cover of the mobile terminal. The invention combines the welding technology and adopts the mould forming mode to manufacture the mobile terminal glass rear cover with large thickness at the position of the camera avoiding hole and small thickness at the other positions, and the production process of the product is simple and the production efficiency is high.
Description
Technical Field
The invention relates to the technical field of production of a mobile terminal glass rear cover, in particular to a manufacturing method of the mobile terminal glass rear cover.
Background
In order to meet the requirements of people on the visual effect of products, the mobile phone glass rear cover made of glass is already available on the market at present. However, in the conventional technology, the glass rear cover of the mobile terminal such as a mobile phone is generally formed by hot bending a piece of flat glass, and in order to ensure the structural strength of the camera avoiding hole, the glass rear cover manufactured by the method needs to be designed to be thicker, so that the requirement of thinning design of the product is difficult to meet. In order to solve the technical problem, in the prior art, some technicians propose a scheme of thinning the rest parts of the glass rear cover except the part where the camera shooting avoiding hole is located in a grinding and polishing mode, and the scheme can realize the thinning of the glass rear cover on the premise of ensuring the structural strength of the camera shooting avoiding hole, but has the defects of complex processing process, high processing difficulty and high processing cost in specific application.
Disclosure of Invention
The invention aims to provide a method for manufacturing a rear cover of mobile terminal glass, and aims to solve the technical problems of complex processing process, high processing difficulty and high processing cost in the prior art that the other parts except the part where a camera avoiding hole is located are processed to be thin by the rear cover of the mobile terminal glass in a grinding and polishing mode.
In order to achieve the purpose, the invention provides the following scheme: the manufacturing method of the mobile terminal glass rear cover comprises the following steps:
a blank preparation step, namely preparing a glass plate blank and a glass block blank;
a hot bending and welding step, namely placing the glass block blank and the glass plate blank in a mold to perform hot bending on the glass plate blank and weld the glass block blank to the glass plate blank to prepare a semi-finished glass rear cover product;
and machining, namely machining a camera shooting avoiding hole penetrating through the glass block blank and the glass plate blank on the glass rear cover semi-finished product, and then grinding and polishing the glass rear cover semi-finished product provided with the camera shooting avoiding hole to obtain the glass rear cover of the mobile terminal.
Optionally, the hot-bending welding step specifically includes:
placing the glass block blank into a first groove at the bottom of a concave cavity of a concave die;
putting the glass plate blank into a concave cavity of a concave die and pressing the glass plate blank against the glass block blank;
buckling a male die on the female die so that the male die and the female die are combined into the die, and pressing the glass plate blank through a boss of the male die;
pressurizing and heating the mould, and controlling the heating temperature of the glass plate blank to reach a first temperature so as to enable the glass plate blank to generate hot bending deformation; controlling the heating temperature of the glass block blank to reach a second temperature so as to melt the glass block blank, wherein the second temperature is higher than the first temperature;
and cooling the mold to shape and solidify the hot-bending deformed glass plate blank, and welding and solidifying the molten glass block blank and the glass plate blank.
Optionally, the operation mode of controlling the heating temperature of the glass block blank to reach the second temperature is as follows: and utilizing a local heating device to align the position of the glass block blank from the side surface of the female die back to the male die to locally heat to the second temperature.
Optionally, the operation mode of locally heating the position of the glass block blank aligned by the local heating device to the second temperature is as follows: and arranging a second groove which is aligned with the first groove on the side surface of the female die, which is opposite to the male die, and locally heating the second groove to the second temperature by using the local heating device.
Optionally, the operation manner of locally heating the second groove by using the local heating device is as follows: and extending a heating head of the local heating device into the second groove for heating.
Optionally, the operation mode of controlling the heating temperature of the glass plate blank to reach the first temperature is as follows: integrally heating the mold to the first temperature using an integral heating device.
Optionally, the overall heating device is used for heating the mold to the first temperature in the following manner: and placing the die in an inner cavity of the integral heating device, and controlling the temperature in the inner cavity of the integral heating device to be heated to the first temperature.
Optionally, the first temperature range value is 600 ℃ to 900 ℃, and the second temperature range value is 1000 ℃ to 1400 ℃.
Optionally, the first temperature has a value in the range of 800 ℃ ± 20 ℃ and the second temperature has a value in the range of 1200 ℃ ± 20 ℃.
Optionally, the machining step is performed on a numerically controlled machine tool.
The invention provides a method for manufacturing a rear glass cover of a mobile terminal, which comprises the steps of welding a glass block blank on a glass plate blank by adopting a welding technology in the process of hot bending and forming the glass plate blank to obtain a semi-finished product of the rear glass cover, processing a camera avoiding hole penetrating through the glass block blank and the glass plate blank on the semi-finished product of the rear glass cover, and grinding and polishing the semi-finished product of the rear glass cover provided with the camera avoiding hole to obtain the rear glass cover of the mobile terminal with larger local thickness and thinner rest thickness. The invention combines the welding technology to replace the prior grinding and polishing mode through the mold forming mode, manufactures the mobile terminal glass rear cover with large thickness at the position of the camera avoiding hole and thin thickness at the other positions, and completes the hot bending forming of the glass and the welding of the glass in one mold, thereby greatly simplifying the processing process of the mobile terminal glass rear cover, reducing the processing difficulty and the processing cost of the mobile terminal glass rear cover and improving the processing efficiency of the mobile terminal glass rear cover.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic flow chart of a method for manufacturing a glass rear cover of a mobile terminal according to an embodiment of the present invention;
FIG. 2 is a schematic front view of a glass rear cover of a mobile terminal according to an embodiment of the present invention;
FIG. 3 is a schematic reverse view of a glass rear cover of a mobile terminal according to an embodiment of the present invention;
FIG. 4 is a schematic view of a glass sheet blank, a glass block blank, and a mold according to an embodiment of the present invention;
FIG. 5 is a schematic forward view of a mold provided in accordance with an embodiment of the present invention;
fig. 6 is a schematic reverse view of a mold provided in an embodiment of the present invention;
fig. 7 is an exploded view of a mold according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a concave die provided in an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a male die provided by an embodiment of the present invention;
fig. 10 is an exploded view of a glass plate blank and a glass block blank according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
It will also be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
As shown in fig. 1, fig. 2, fig. 4 and fig. 10, the glass rear cover 100 of the mobile terminal according to the embodiment of the present invention includes a glass rear cover body 110, a glass bump 120 protruding from a rear side surface of the glass rear cover body 110, and a camera avoiding hole 130 penetrating from the glass rear cover body 110 toward the glass bump 120. The glass rear cover body 110 is formed by hot bending a glass plate blank, and the glass bump 120 is fixed on the rear side surface of the glass rear cover body 110 by a glass block blank through a hot melting technology. The glass rear cover 100 of the mobile terminal provided by the embodiment of the invention is suitable for but not limited to mobile terminals such as mobile phones and tablet computers.
As shown in fig. 1 to 10, the method for manufacturing a rear cover 100 of a mobile terminal glass according to an embodiment of the present invention includes the following steps:
a blank preparation step S1 of preparing a glass plate blank 300 and a glass block blank 400;
a hot-bending fusion step S2 of placing the glass block blank 400 and the glass plate blank 300 in the mold 200 to hot-bend the glass plate blank 300 and fuse the glass block blank 400 to the glass plate blank 300 to produce a glass rear cover semi-finished product;
and a machining step S3, processing a camera avoidance hole 130 penetrating through the glass block blank 400 and the glass plate blank 300 on the glass rear cover semi-finished product, and then grinding and polishing the glass rear cover semi-finished product provided with the camera avoidance hole 130 to obtain the glass rear cover 100 of the mobile terminal.
According to the manufacturing method of the rear glass cover 100 of the mobile terminal, provided by the embodiment of the invention, in the process of hot bending and forming the glass plate blank 300, a glass block blank 400 is welded on the glass plate blank 300 by adopting a welding technology to manufacture a semi-finished product of the rear glass cover, then the camera avoiding hole 130 penetrating through the glass block blank 400 and the glass plate blank 300 is processed on the semi-finished product of the rear glass cover, and then the semi-finished product of the rear glass cover provided with the camera avoiding hole 130 is ground and polished, so that the rear glass cover 100 of the mobile terminal with larger local thickness and thinner residual thickness is manufactured. The embodiment of the invention combines a welding technology to replace the existing grinding and polishing mode through a mold 200 forming mode, so as to manufacture the mobile terminal glass rear cover 100 with the large thickness of the part where the camera avoiding hole 130 is located and the small thickness of the other parts, and the hot bending forming of the glass and the welding of the glass are finished in one mold 200, thereby greatly simplifying the processing process of the mobile terminal glass rear cover 100, reducing the processing difficulty and the processing cost of the mobile terminal glass rear cover 100, and improving the processing efficiency of the mobile terminal glass rear cover 100.
Preferably, the mold 200 includes a female mold 210 and a male mold 220, the female mold 210 has a first side and a second side which are oppositely arranged, the first side is concavely provided with a concave cavity 211, a cavity bottom wall 2111 of the concave cavity 211 is concavely provided with a first groove 212, the second side is concavely provided with a second groove 213 which is oppositely arranged, and one side of the male mold 220 is provided with a boss 221 which is matched with the concave cavity 211 and is used for pressing the glass plate blank 300. The cavity bottom wall 2111 of the cavity 211 is specifically a wall at the bottom of the cavity 211, and the cavity bottom wall 2111 is spaced from and opposite to the opening of the cavity 211.
Preferably, the hot-bending welding step S2 is specifically:
placing the glass block blank 400 into a first groove 212 at the bottom of the cavity 211 of the female die 210, wherein the first groove 212 is used for positioning the glass block blank 400;
placing the glass plate blank 300 into the cavity 211 of the female die 210 and pressing against the glass block blank 400, wherein a third groove 310 for positioning the glass block blank 400 is formed in the side surface of the glass plate blank 300 facing the glass block blank 400;
buckling the male die 220 on the female die 210 to enable the male die 220 and the female die 210 to form the die 200, and pressing the glass plate blank 300 through the boss 221 of the male die 220, wherein the boss 221 is used for matching with the cavity 211 to press the glass plate blank 300 to deform under the conditions of pressurization and heating;
pressurizing and heating the mold 200, and controlling the heating temperature of the glass plate blank 300 to reach a first temperature so as to cause the glass plate blank 300 to generate hot bending deformation; and controlling the heating temperature of the glass block blank 400 to a second temperature to melt the glass block blank 400, the second temperature being greater than the first temperature;
and cooling the mold 200 to shape and solidify the hot-bending deformed glass plate blank 300, and fusing and solidifying the molten glass block blank 400 and the glass plate blank 300 to obtain a semi-finished glass rear cover.
By adopting the specific steps of the hot bending and welding step S2, the hot bending of the glass plate blank 300 can be realized, and the welding of the glass block blank 400 and the glass plate blank 300 can be realized, so as to obtain a semi-finished product of the glass rear cover with a thicker local thickness.
Preferably, the glass block blank 400 and the glass plate blank 300 are made of glass of the same material, so that the first temperature and the second temperature can be controlled better, and the stability and reliability of welding of the glass block blank 400 and the glass plate blank 300 can be guaranteed. The first temperature is greater than or equal to the bending deformation temperature of the glass but less than the melting point of the glass, and the second temperature is greater than or equal to the melting point of the glass.
Preferably, the first groove 212 has a concave depth of 0.1mm to 1.0 mm. In a specific application, the depth of the first groove 212 may be optimized according to the protruding thickness of the glass bump 120 at the rear side of the rear cover 100 of the mobile terminal glass.
Preferably, the operation of controlling the heating temperature of the glass block blank 400 to the second temperature is: a localized heating device (not shown) is used to locally heat the gob blank 400 from the side of the female mold 210 opposite the male mold 220 to a second temperature. Here, the local heating device is used to locally heat the position of the glass block blank 400 to the second temperature, which is beneficial to reducing the influence of the heating of the local heating device on the temperature of the glass plate blank 300.
Preferably, the local heating to the second temperature by the local heating device is performed by aligning the position of the glass block blank 400: a second groove 213 is formed on the side of the female mold 210 opposite to the male mold 220 and aligned with the first groove 212, and the second groove 213 is locally heated to a second temperature by a local heating device. The provision of the second groove 213 facilitates the local heating device to heat the gob blank 400 more precisely, so as to better heat the gob blank 400 to a melt without melting the sheet blank 300.
Preferably, the local heating of the second groove 213 by the local heating device is performed by: the heating head of the local heating device is extended into the second groove 213 for heating. The heating head is extended into the second groove 213 for heating, which is beneficial to further reducing the influence on the temperature of the glass plate blank 300 when the local heating device is used for heating.
Preferably, the operation of controlling the heating temperature of the glass sheet blank 300 to the first temperature is: the mold 200 is integrally heated to the first temperature by an integral heating device (not shown), which is simple to operate and easy to implement.
Preferably, the operation of integrally heating the mold 200 to the first temperature by the integral heating device is as follows: the mold 200 is placed in the inner cavity of the integral heating device, and the temperature in the inner cavity of the integral heating device is controlled to be heated to a first temperature. This heating method is equivalent to heating the sealed environment where the mold 200 is located to the first temperature, and this heating method can prevent the heat loss during the heating process, thereby being beneficial to improving the heating efficiency.
Preferably, the first temperature is in the range of 600 ℃ to 900 ℃ where the glass sheet blank 300 can be thermally deformed without melting. The second temperature is in the range of 1000 ℃ to 1400 ℃, and the glass block blank 400 can be melted in the range of the second temperature and is easy to regulate.
More preferably, the first temperature is in the range of 800 ℃ ± 20 ℃, and the thermal deformation efficiency of the glass plate blank 300 can be made high and easily controlled within the temperature range. The second temperature range is 1200 ℃ ± 20 ℃, and the melting efficiency of the glass block blank 400 can be higher and is easy to regulate within the range.
Preferably, the machining step S3 is performed on a numerically controlled machine tool (not shown). Here, the processing, grinding and polishing of the image capture avoiding hole 130 are automatically finished on the same numerical control machine tool, and the processing efficiency is high.
Preferably, as shown in fig. 1 and 2, the camera avoidance hole 130 includes at least one camera avoidance hole 131 for avoiding a camera of the mobile terminal and a flash avoidance hole 132 for avoiding a flash of the mobile terminal. One camera avoidance hole 131 is correspondingly aligned with one camera on the mobile terminal, and the flash avoidance hole 132 is correspondingly aligned with the flash on the mobile terminal.
Preferably, the camera avoidance hole 131 and the flash avoidance hole 132 are separately arranged, that is, the camera avoidance hole 131 and the flash avoidance hole 132 are not communicated with each other. Of course, as an alternative embodiment, the camera avoidance hole 131 and the flash avoidance hole 132 may be configured to be communicated, and the camera avoidance hole 131 and the flash avoidance hole 132 are communicated to form an integral hole.
As a preferred embodiment of this embodiment, there are two camera avoidance hole sites 131, which are suitable for a mobile terminal with two rear cameras; of course, in a specific application, only one camera avoidance hole 131 may be provided, which is suitable for a mobile terminal having a rear camera.
Preferably, the outer edge of the glass rear cover body 110 is rectangular, the outer edge of the glass rear cover body 110 includes two long edges which are oppositely arranged at intervals and two short edges which are oppositely arranged at intervals and two ends of which are respectively connected with the two long edges, and the image capture avoiding hole 130 is located between one short edge and the middle parting line of the two long edges. The position of the image capture avoiding hole 130 can be optimally designed according to the positions of the camera and the flash lamp on different mobile terminals, and is not limited herein.
Preferably, the camera avoidance hole 130 is located between a long edge and a bisector of two short edges. The position of the image capture avoiding hole 130 may be optimally designed according to the positions of the camera and the flash on different mobile terminals, which is not limited herein, for example, as a preferred alternative embodiment, the image capture avoiding hole 130 is centrally disposed with respect to the center parting line of the two short edges.
Preferably, the camera avoidance hole 131 and the flash avoidance hole 132 are distributed side by side along the extending direction of the long edge. The distribution mode of the camera avoidance hole site 131 and the flash avoidance hole site 132 can be optimized according to the distribution mode of the cameras and the flashes on different mobile terminals, and is not limited herein, for example, as an optimal alternative embodiment, the camera avoidance hole site 131 and the flash avoidance hole site 132 are distributed side by side along the extending direction of the short edge.
Preferably, the mold adopted in the embodiment has the following optimized design structure:
preferably, the boss 221 has a pressing end face 2211 facing the cavity bottom wall face 2111 for pressing the glass to be thermally bent, and the pressing end face 2211 is a flat surface. A flat surface refers in particular to a surface which is flat and free of irregularities. Here, since the boss 221 does not need to form a local concave structure on the glass plate blank 300 when the glass plate blank 300 is pressed and hot-bent, the design requirement can be met without providing a convex pressing structure on the pressing end face 2211 of the boss 221, and on the premise of meeting the design requirement, the pressing end face 2211 is designed to be a flat surface, which has the characteristics of simple structure and easy manufacturing and forming.
Preferably, the pressing end face 2211 is a rectangular plane, that is, the pressing end face 2211 is a continuous and flat rectangular plane.
Preferably, the first groove 212 has a concave depth of 0.1mm to 1.0 mm. In a specific application, the depth of the first groove 212 may be optimized according to the protruding thickness of the glass bump 120 at the rear side of the rear cover 100 of the mobile terminal glass.
Preferably, the first groove 212 has a groove bottom wall surface 2121 far from the cavity bottom wall surface 2111, a groove body wall surface 2122 extending from the edge of the groove bottom wall surface 2121 toward the cavity bottom wall surface 2111, and a notch wall surface 2123 smoothly transitionally connected between the groove side wall surface and the cavity bottom wall surface 2111, wherein the notch wall surface 2123 is bent and extended from the groove body wall surface 2122 toward the cavity bottom wall surface 2111 with a trend of gradually increasing distance from the center of the first groove 212, and in this way, the glass block blank 400 and the glass plate blank 300 can be welded together with a larger connecting area, thereby being beneficial to ensuring the stable and reliable connection of the glass block blank 400 and the glass plate blank 300 after being welded together.
Preferably, the groove bottom wall 2121 of the first groove 212 includes a rectangular wall and two semicircular walls respectively disposed at two ends of the rectangular wall, so that the edge of the formed glass bump 120 is smooth.
Preferably, the outer edge of the cavity bottom wall 2111 includes two long edges 2101 disposed opposite to each other at a certain interval and two short edges 2102 disposed opposite to each other at a certain interval and having two ends respectively connected to the two long edges 2101, and the first groove 212 is located between one short edge 2102 and the middle dividing line of the two long edges 2101. The position of the first groove 212 may be optimally designed according to the positions of the camera and the flash on different mobile terminals, which is not limited herein.
Preferably, the first groove 212 is located between one long edge 2101 and the midline of the two short edges 2102. The position of the first groove 212 may be optimized according to the positions of the camera and the flash on different mobile terminals, and is not limited herein, for example, as another preferred alternative, the first groove 212 is centered with respect to the midline of the two short edges 2102.
Preferably, the male mold 220 includes a base plate 222 and a boss 221, the base plate 222 has a first plate surface and a second plate surface which are oppositely arranged, the boss 221 is protruded on the first plate surface, and the first plate surface has a pressing end surface 2221 which is annularly arranged on the periphery of one end of the boss 221, and the female mold 210 has a matching end surface 214 which is annularly arranged on the periphery of the opening of the cavity 211 for abutting and matching with the pressing end surface 2221. In the production process, when the die is closed, the boss 221 is inserted into the cavity 211, and the press-fit end surface 2221 abuts against the matching end surface 214; when the mold is separated, the press-fit end surface 2221 is separated from the mating end surface 214, and the boss 221 is pulled out of the cavity 211.
Preferably, both the press-fit end surface 2221 and the mating end surface 214 are flat, annular flat surfaces. Here, both the press-fitting end surface 2221 and the mating end surface 214 are designed to be flat annular planes without any concave-convex structure, and there is no need to provide a concave-convex structure on the press-fitting end surface 2221 and the mating end surface 214, so that the structures of the female die 210 and the male die 220 are simple and easy to manufacture and mold under the condition that the design requirements are satisfied.
Preferably, the boss 221 has a boss outer side 2212 with one end connected to the inner edge of the annular plane and a transition curved surface 2213 smoothly transitionally connected between the boss outer side 2212 and the outer edge of the pressing end 2211. The design of the transition curved surface 2213 is mainly used for pressing the glass plate blank 300 to generate hot bending deformation.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The manufacturing method of the mobile terminal glass rear cover is characterized by comprising the following steps:
a blank preparation step, namely preparing a glass plate blank and a glass block blank;
a hot bending and welding step, namely placing the glass block blank and the glass plate blank in a mold to perform hot bending on the glass plate blank and weld the glass block blank to the glass plate blank to prepare a semi-finished glass rear cover product;
and machining, namely machining a camera shooting avoiding hole penetrating through the glass block blank and the glass plate blank on the glass rear cover semi-finished product, and then grinding and polishing the glass rear cover semi-finished product provided with the camera shooting avoiding hole to obtain the glass rear cover of the mobile terminal.
2. The method for manufacturing a glass rear cover of a mobile terminal according to claim 1, wherein the hot-bending welding step is specifically as follows:
placing the glass block blank into a first groove at the bottom of a concave cavity of a concave die;
putting the glass plate blank into a concave cavity of a concave die and pressing the glass plate blank against the glass block blank;
buckling a male die on the female die so that the male die and the female die are combined into the die, and pressing the glass plate blank through a boss of the male die;
pressurizing and heating the mould, and controlling the heating temperature of the glass plate blank to reach a first temperature so as to enable the glass plate blank to generate hot bending deformation; controlling the heating temperature of the glass block blank to reach a second temperature so as to melt the glass block blank, wherein the second temperature is higher than the first temperature;
and cooling the mold to shape and solidify the hot-bending deformed glass plate blank, and welding and solidifying the molten glass block blank and the glass plate blank.
3. The method for manufacturing a glass rear cover of a mobile terminal according to claim 2, wherein the operation mode for controlling the heating temperature of the glass block blank to reach the second temperature is as follows: and utilizing a local heating device to align the position of the glass block blank from the side surface of the female die back to the male die to locally heat to the second temperature.
4. The method for manufacturing a glass rear cover of a mobile terminal according to claim 3, wherein the local heating device is used for locally heating the position of the glass block blank to the second temperature in a manner of aligning the position of the glass block blank to the second temperature: and arranging a second groove which is aligned with the first groove on the side surface of the female die, which is opposite to the male die, and locally heating the second groove to the second temperature by using the local heating device.
5. The method for manufacturing a glass rear cover of a mobile terminal according to claim 4, wherein the local heating means is used for locally heating the second groove by: and extending a heating head of the local heating device into the second groove for heating.
6. The method for manufacturing a glass rear cover of a mobile terminal according to any one of claims 2 to 5, wherein the operation mode for controlling the heating temperature of the glass plate blank to reach the first temperature is as follows: integrally heating the mold to the first temperature using an integral heating device.
7. The method for manufacturing a glass rear cover of a mobile terminal according to claim 6, wherein the integral heating means is used to integrally heat the mold to the first temperature by: and placing the die in an inner cavity of the integral heating device, and controlling the temperature in the inner cavity of the integral heating device to be heated to the first temperature.
8. The method for manufacturing a glass rear cover of a mobile terminal according to any one of claims 2 to 5, wherein the first temperature is in a range of 600 ℃ to 900 ℃ and the second temperature is in a range of 1000 ℃ to 1400 ℃.
9. The method for manufacturing a glass rear cover of a mobile terminal according to claim 8, wherein the first temperature has a value in a range of 800 ℃ ± 20 ℃ and the second temperature has a value in a range of 1200 ℃ ± 20 ℃.
10. The method for manufacturing a glass rear cover of a mobile terminal according to any one of claims 1 to 5, wherein the machining step is performed on a numerically controlled machine tool.
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| CN109079429A (en) * | 2018-06-27 | 2018-12-25 | 安徽金龙浩光电科技有限公司 | A kind of 3.5D hand-set lid production technology |
| CN109437524A (en) * | 2018-12-17 | 2019-03-08 | 苏州胜禹材料科技股份有限公司 | Not equal heavy sheet glass 3D hot-bending machine and 3D glass forming method |
| CN110696378B (en) * | 2019-08-28 | 2021-10-26 | 维达力实业（赤壁）有限公司 | Electronic product shell and manufacturing method thereof |
| CN114804598A (en) * | 2021-01-21 | 2022-07-29 | 大族激光科技产业集团股份有限公司 | Processing method of electronic product cover plate |
| CN114800053A (en) * | 2022-03-30 | 2022-07-29 | 盐城牧东光电科技有限公司 | Three-dimensional mobile phone rear cover glass and preparation method thereof |
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Effective date of registration: 20231123 Address after: 518172 1st floor, building 1, Xinwu Industrial Zone, 32 cuibao Road, Baolong street, Longgang District, Shenzhen City, Guangdong Province (1st floor, building 3, No. 30) Patentee after: SHENZHEN DONGFANG CARBON INDUSTRIAL CO.,LTD. Address before: 518100 1st floor, building B, Shuanghuan new generation information technology industrial park, No. 8, Baoqing Road, Baolong Industrial Zone, Longgang street, Longgang District, Shenzhen City, Guangdong Province Patentee before: SANDI NEW MATERIALS (SHENZHEN) CO.,LTD. |