CN110040945B - Manufacturing method of glass cover plate of hot-bending mobile phone - Google Patents
Manufacturing method of glass cover plate of hot-bending mobile phone Download PDFInfo
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- CN110040945B CN110040945B CN201910188719.5A CN201910188719A CN110040945B CN 110040945 B CN110040945 B CN 110040945B CN 201910188719 A CN201910188719 A CN 201910188719A CN 110040945 B CN110040945 B CN 110040945B
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- suction module
- glass workpiece
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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
- C03B23/02—Re-forming glass sheets
- C03B23/023—Re-forming glass sheets by bending
- C03B23/035—Re-forming glass sheets by bending using a gas cushion or by changing gas pressure, e.g. by applying vacuum or blowing for supporting the glass while bending
- C03B23/0352—Re-forming glass sheets by bending using a gas cushion or by changing gas pressure, e.g. by applying vacuum or blowing for supporting the glass while bending by suction or blowing out for providing the deformation force to bend the glass sheet
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Abstract
The invention discloses a manufacturing method of a glass cover plate of a hot-bending mobile phone, which comprises the following steps: preheating and forming a glass workpiece; carrying out hot pressing and first heat absorption on the glass workpiece after preheating and preforming; performing second heat absorption on the glass workpiece; maintaining the pressure of the glass workpiece after the second heat absorption; and cooling the glass workpiece after pressure maintaining to manufacture the mobile phone glass cover plate. According to the invention, the heat absorption technology is added when the glass workpiece is bent, hot pressing and first heat absorption are simultaneously carried out when the glass cover plate of the mobile phone is close to the molding, and then the second heat absorption is carried out to completely absorb the glass workpiece on the cavity surface of the mold, so that the formed glass cover plate of the mobile phone can be ensured to be consistent with the drawing, the profile degree surface is better, the stamping on the glass cover plate of the mobile phone after the molding is reduced, the time is saved for the subsequent molding process, and the molding efficiency is improved.
Description
Technical Field
The invention relates to the technical field of 3D curved glass cover plate forming, in particular to a manufacturing method of a thermally curved mobile phone glass cover plate.
Background
In the prior art, when a glass workpiece is bent by heating, the procedures of preheating, hot pressing, pressure maintaining and cooling are needed to be sequentially carried out, and the mobile phone glass cover plate is formed by pressure, however, the formed product has more stamping and is easy to cause the increase of the defective rate of the product.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a manufacturing method of a thermally bent mobile phone glass cover plate, which solves the technical problems that the existing glass workpiece is more in stamping and easily causes the increase of the defective rate of products when the mobile phone glass cover plate is formed by thermally bending.
The invention is realized by adopting the following technical scheme:
the invention provides a manufacturing method of a glass cover plate of a hot-bending mobile phone, which comprises the following steps:
preheating and forming a glass workpiece;
carrying out hot pressing and first heat absorption on the glass workpiece after preheating and preforming;
performing second heat absorption on the glass workpiece;
maintaining the pressure of the glass workpiece after the second heat absorption;
and cooling the glass workpiece after pressure maintaining to manufacture the mobile phone glass cover plate.
Further, after the glass workpiece enters the forming chamber, the glass workpiece sequentially passes through a plurality of preheating modules which are arranged in a pipeline form, and the glass workpiece is heated by the plurality of preheating modules in stages so that the glass workpiece is naturally bent and preformed under the self gravity after being heated and softened.
Further, the step of hot-pressing and first heat-absorbing the glass workpiece after preheating and preforming comprises the step of hot-pressing the glass workpiece and simultaneously absorbing the glass workpiece downwards;
the step of performing the second heat suction on the glass workpiece comprises performing suction on the glass workpiece after the glass workpiece is sucked down.
Further, after the glass workpiece is preheated and formed, the glass workpiece sequentially passes through a first hot pressing suction module, a second hot pressing suction module, a lower suction module, a first upper suction module, a second upper suction module and a third upper suction module which are arranged in a pipeline form, the first hot pressing suction module and the second hot pressing suction module simultaneously perform hot pressing and lower suction on the glass workpiece in stages, the lower suction module performs lower suction on the glass workpiece, and the first upper suction module, the second upper suction module and the third upper suction module perform upper suction on the glass workpiece in stages.
Further, the first heat is pressed down and is inhaled the module, is inhaled the module down under the second heat, and the first module that inhales, the second is gone up and is inhaled the module and the third is gone up and inhale the module and all have first upper heating plate, first lower hot plate, the vacuum suction head of being connected with outside vacuum equipment and be used for driving first drive component that goes up the hot plate and go up the lift, first upper heating plate and first lower hot plate heat up cope match-plate pattern and lower bolster respectively, first lower hot plate, the second heat of inhaling the module down under the first heat of module, lower hot plate, first upper heating plate of first upper suction module, first upper heating plate of second upper suction module and the first upper heating plate of third upper suction module of first heat down are all provided with the vacuum suction head.
Further, when each first driving member of the second hot pressing suction module, the lower suction module, the first upper suction module, the second upper suction module and the third upper suction module respectively drives each first upper heating plate to press down, a margin of 0.1+/-0.01 mm is reserved between the upper die plate and the lower die plate.
Further, the upper template and the lower template are made of breathable materials.
Further, the glass workpiece is subjected to downdraft forming and then passes through a pressure maintaining module, the pressure maintaining module is provided with a second upper heating plate, a second lower heating plate and a second driving member for driving the second upper heating plate to lift, and the second upper heating plate and the second lower heating plate respectively heat the upper template and the lower template.
Further, the cooling medium used for cooling the glass workpiece is water.
Further, preheating, hot pressing, first heat absorption, second heat absorption, pressure maintaining and cooling of the glass workpiece are all performed in a forming chamber filled with nitrogen.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the heat absorption technology is added when the glass workpiece is bent, hot pressing and first heat absorption are simultaneously carried out when the glass cover plate of the mobile phone is close to the molding, and then the second heat absorption is carried out to completely absorb the glass workpiece on the cavity surface of the mold, so that the formed glass cover plate of the mobile phone can be ensured to be consistent with the drawing, the profile degree surface is better, the stamping on the glass cover plate of the mobile phone after the molding is reduced, the time is saved for the subsequent molding process, and the molding efficiency is improved.
Drawings
FIG. 1 is a flow chart of a method for manufacturing a glass cover plate of a hot-bending mobile phone according to an embodiment of the invention;
FIG. 2 is a schematic view of a structure of a glass workpiece just placed in a mold according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a preheated glass workpiece placed in a mold according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a glass workpiece placed in a mold after being sucked down according to an embodiment of the present invention;
fig. 5 is a schematic view of a part of a structure of a glass cover plate device for a hot bending mobile phone according to an embodiment of the present invention;
fig. 6 is an enlarged partial schematic view at a in fig. 5.
In the figure: 1. a glass work piece; 2. a mold; 21. an upper template; 22. a lower template; 3. a preheating module; 31. a third upper heating plate; 32. a third lower heating plate; 33. a third driving member; 4. a forming chamber; 5. a hot pressing heat absorbing component; 51. a first thermal pressure down-suction module; 511. a first upper heating plate; 512. a first lower heating plate; 513. a vacuum suction head; 514. a first driving member; 52. a second thermal pressure down-draft module; 53. a downdraft module; 54. a first up-draught module; 55. a second up-draught module; 56. a third updraft module; 7. a pressure maintaining module; 71. a second upper heating plate; 72. a second lower heating plate; 73. a second driving member; 8. and a cooling mechanism.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and detailed description, wherein it is to be understood that, on the premise of no conflict, the following embodiments or technical features may be arbitrarily combined to form new embodiments.
As shown in fig. 1-6, the embodiment of the invention provides a manufacturing method of a thermally bent mobile phone glass cover plate, which is used for thermally bending a glass workpiece 1 in a die 2 into the mobile phone glass cover plate after a series of procedures. Specifically, the manufacturing method of the glass cover plate of the hot-bending mobile phone provided by the embodiment of the invention comprises the following steps:
s101, preheating and forming are carried out on the glass workpiece 1. The glass workpiece 1 is in a shape just put on the die 2 as shown in fig. 2, the glass workpiece 1 is basically flat, after the glass workpiece 1 is preheated and preformed for the first time, the glass workpiece 1 is in a collapsed state under the action of self gravity after being softened at a high temperature due to the influence of a high temperature environment, and the shape is shown in fig. 3.
S102, carrying out hot pressing and first heat absorption on the glass workpiece 1 after preheating and preforming. The step of hot-pressing and first heat-absorbing the glass workpiece 1 after preheating the preform includes downabsorbing the glass workpiece 1 while hot-pressing the glass workpiece 1.
S103, performing second heat absorption on the glass workpiece 1. The second heat-absorbing step for the glass work 1 includes absorbing the glass work 1 down and then absorbing up the glass work 1, and fig. 4 shows a state after absorbing down the glass work 1.
And S104, maintaining the pressure of the glass workpiece 1 after the second heat absorption. After the glass workpiece 1 is formed by suction, the glass workpiece passes through a pressure maintaining module 7, and the number of the pressure maintaining modules 7 in the embodiment is one.
S105, cooling the glass workpiece 1 after pressure maintaining to manufacture a mobile phone glass cover plate, wherein the cooling medium used for cooling the glass workpiece 1 in the embodiment is water.
As shown in fig. 5, after the glass workpiece 1 enters the forming chamber 4, the glass workpiece 1 is pushed by a pushing mechanism to sequentially pass through a plurality of preheating modules 3 arranged in a pipeline form, and the plurality of preheating modules 3 heat the glass workpiece 1 in stages so as to naturally bend and preform the glass workpiece 1 under the self gravity after being heated and softened; after the glass workpiece 1 is preheated and formed, the glass workpiece 1 passes through the hot pressing heat absorbing assembly 5 under the continuous pushing action of the pushing mechanism, the hot pressing heat absorbing assembly 5 comprises a first hot pressing heat absorbing module 51, a second hot pressing heat absorbing module 52, a lower absorbing module 53, a first upper absorbing module 54, a second upper absorbing module 55 and a third upper absorbing module 56 which are sequentially arranged in a pipeline form, the first hot pressing heat absorbing module 51 and the second hot pressing heat absorbing module 52 absorb the glass workpiece 1 downwards in stages, the lower absorbing module 53 absorbs the glass workpiece 1 downwards in stages, the first upper absorbing module 54, the second upper absorbing module 55 and the third upper absorbing module 56 absorb the glass workpiece 1 upwards in stages, then the mobile phone glass cover plate can be subjected to pressure maintaining and cooling treatment, and the fact that the glass workpiece 1 is preheated, hot pressed, the first hot absorbing heat, the second hot absorbing heat maintaining heat and the pressure maintaining are all carried out in a forming chamber 4 filled with nitrogen gas for thermally bending the mobile phone glass cover plate device, and the cooling is carried out in the other forming chamber filled with nitrogen gas, and the nitrogen gas can prevent the mobile phone glass from reacting with oxygen in air at high temperature to affect the forming quality of the mobile phone glass cover plate.
As shown in fig. 6, the number of preheating modules 3 in the present embodiment is seven, and seven preheating modules 3 do not have pressure on the mold 2, and the set temperature thereof is gradually increased from 500 degrees to 730 degrees. The preheating module 3 has a third upper heating plate 31, a third lower heating plate 32 and a third driving member 33 for driving the third upper heating plate 31 to rise and fall, and the third upper heating plate 31 and the third lower heating plate 32 heat the upper die plate 21 and the lower die plate 22 of the die 2, respectively.
As a preferred embodiment, the first, second, lower, upper, and third upper suction modules 51, 52, 53, 54, 55, and 56 each have a first upper heating plate 511, a first lower heating plate 512, a vacuum suction head 513 connected to an external vacuum apparatus, and a first driving member 514 for driving the first upper heating plate 511 to move up and down, and the heat suction is actually to make a hole in each of the first upper heating plate 511 and the first lower heating plate 512, install the vacuum suction head 513 on the hole, and connect the vacuum apparatus. The first upper heating plate 511 and the first lower heating plate 512 heat the upper die plate 21 and the lower die plate 22, respectively, and the first lower heating plate 512 of the first heat pressing suction module 51, the first lower heating plate 512 of the second heat pressing suction module 52, the first lower heating plate 512 of the lower suction module 53, the first upper heating plate 511 of the first upper suction module 54, the first upper heating plate 511 of the second upper suction module 55, and the first upper heating plate 511 of the third upper suction module 56 are each provided with a vacuum suction head 513.
In order to prevent the molded glass cover plate product of the mobile phone from being more in stamping and easily causing the increase of bad products, the second hot-pressing suction module 52, the lower suction module 53, the first upper suction module 54, the second upper suction module 55 and the third upper suction module 56 are limited due to the limited travel of the respective first driving members 514, and when the respective first driving members 514 on the second hot-pressing suction module 52, the lower suction module 53, the first upper suction module 54, the second upper suction module 55 and the third upper suction module 56 respectively drive the respective first upper heating plates 511 to press down, a margin of 0.1 plus or minus 0.01mm is reserved between the upper die plate 21 and the lower die plate 22 so that the vacuum suction head 513 can suck down and suck up the glass workpiece 1 respectively.
Preferably, the upper and lower templates 21 and 22 are made of a gas-permeable material, preferably graphite, so that the vacuum suction head 513 can directly absorb the glass workpiece 1 through the upper or lower templates 21 and 22 when being abutted against the mold 2, and the graphite has a shore hardness of 70-100, a thermal expansion coefficient of 8.0-8.7, and a thermal conductivity of 60-90 in this embodiment.
In this embodiment, the heating temperatures of the first hot-pressing suction module 51, the second hot-pressing suction module 52, the lower suction module 53, the first upper suction module 54, the second upper suction module 55 and the third upper suction module 56 for the upper die plate 21 and the lower die plate 22 respectively are all 300-800 degrees, specifically, the temperature of each first upper heating plate 511 is reduced from 770 degrees to 350 degrees in a gradually decreasing trend, and the temperature of each first lower heating plate 512 is reduced from 770 degrees to 550 degrees in a gradually decreasing trend, which can be adjusted appropriately according to the actual conditions of production.
As a preferred embodiment, the output pressure of each first driving member 514 driving each first upper heating plate 511 to be pressed down by each first upper heating plate 51, each second upper heating plate 511 to be pressed down by each first driving member 514 driving each first upper heating plate 511 to be pressed down to be in place is 20S to 200S, and the pressing time kept after the first upper heating plates 511 are pressed down to be in place is 20S to 200S. For example: the output pressure of the first thermal pressure suction module 51 is 0.001MPa when the upper die plate 21 is pressed down, the pressing time is 2 minutes, the output pressure of the second thermal pressure suction module 52 is 0.65MPa when the upper die plate 21 is pressed down, and the pressing time is 100 seconds, in this embodiment, the pressing time refers to the time for which the first driving member 514 drives the first upper heating plate 511 to move to a specified position in a stroke and then to keep pressing.
The glass workpiece 1 is subjected to downdraft forming and then passes through a pressure maintaining module 7, wherein the pressure maintaining module 7 is provided with a second upper heating plate 71, a second lower heating plate 72 and a second driving member 73 for driving the second upper heating plate 71 to lift, and the second upper heating plate 71 and the second lower heating plate 72 respectively heat the upper template 21 and the lower template 22.
The first drive member 514, the second drive member 73 and the third drive member 33 in this embodiment are preferably air cylinders, and the first upper heating plate 511, the first lower heating plate 512, the second upper heating plate 71, the second lower heating plate 72, the third upper heating plate 31 and the third lower heating plate 32 are all made of tungsten steel plates.
The specific implementation mode of the manufacturing method of the hot-bending mobile phone glass cover plate is as follows: the mold 2 with the glass workpiece 1 is sent into the sealed forming chamber 4 by a pushing mechanism, at the moment, the forming chamber 4 is filled with nitrogen, the mold 2 is sequentially pushed to the lower part of the third upper heating plate 31 of the seventh preheating module 3 by the pushing mechanism from the lower part of the third upper heating plate 31 of the first preheating module 3, and the glass workpiece 1 in the mold 2 is in a collapse state under the action of self gravity due to the influence of the high temperature environment of the seven preheating modules 3 so as to finish preheating forming of the glass workpiece 1; the pushing mechanism pushes the die 2 to the lower part of the first upper heating plate 511 of the first hot-pressing suction module 51, the first driving member 514 of the first hot-pressing suction module 51 drives the first upper heating plate 511 thereon to press the upper die plate 21, and the vacuum suction head 513 on the first lower heating plate 512 thereon is vacuumized to perform first-stage hot pressing and downward suction on the glass workpiece 1; after the first hot-pressing and sucking-down module 51 completes the first stage hot-pressing and sucking-down of the glass workpiece 1, the first driving member 514 of the first hot-pressing and sucking-down module 51 drives the first upper heating plate 511 to rise, the pushing mechanism pushes the mold 2 to move below the first upper heating plate 511 of the second hot-pressing and sucking-down module 52, the first driving member 514 of the second hot-pressing and sucking-down module 52 drives the first upper heating plate 511 thereon to press the upper die plate 21, so that a margin of 0.1+/-0.01 mm is reserved between the upper die plate 21 and the lower die plate 22, and simultaneously the vacuum suction head 513 on the first lower heating plate 512 thereon is vacuumized to perform the second stage hot-pressing and sucking-down of the glass workpiece 1; after the second hot pressing and downdraught of the second stage of the glass workpiece 1 are completed by the second hot pressing and downdraught module 52, the first driving member 514 of the second hot pressing and downdraught module 52 drives the first upper heating plate 511 to ascend, the pushing mechanism pushes the die 2 to move below the first upper heating plate 511 of the downdraught module 53, the first driving member 514 of the downdraught module 53 abuts against the first upper heating plate 511 on the upper template 21, a margin of 0.1+/-0.01 mm is reserved between the upper template 21 and the lower template 22, and the vacuum suction head 513 on the first lower heating plate 512 in the downdraught module 53 is vacuumized to perform downdraught of the third stage of the glass workpiece 1. The first driving member 514 of the lower suction module 53 drives the first upper heating plate 511 to ascend, the pushing mechanism pushes the mold 2 to move below the first upper heating plate 511 of the first upper suction module 54, the first driving member 514 of the first upper suction module 54 drives the first upper heating plate 511 thereon to lower the upper die plate 21, a margin of 0.1+/-0.01 mm is reserved between the upper die plate 21 and the lower die plate 22, the upper die plate 21 on the first upper suction module 54 starts vacuumizing to suck the glass workpiece 1 in the first stage, and the second upper suction module 55 and the third upper suction module 56 are the same as the first upper suction module 54 to suck the glass workpiece 1 in the second stage and the third stage respectively. Then, the pushing mechanism pushes the die 2 to the lower part of the second upper heating plate 71 of the pressure maintaining module 7 for pressure maintaining treatment, and then the pushing mechanism pushes the die 2 after pressure maintaining to the other sealed forming chamber 4 for cooling treatment by the cooling mechanism 8 so as to manufacture the glass cover plate of the mobile phone.
In summary, according to the invention, by adding the heat absorption process when the glass workpiece 1 is bent, hot pressing and first heat absorption are simultaneously performed when the glass cover plate of the mobile phone approaches to molding, and then the second heat absorption is performed to completely absorb the glass workpiece 1 on the cavity surface of the mold 2, so that the formed glass cover plate of the mobile phone can be ensured to have the same shape as the drawing, the profile degree surface is better, the stamping on the formed glass cover plate of the mobile phone is reduced, the time is saved for the subsequent molding process, and the molding efficiency is improved.
The above embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present invention are intended to be within the scope of the present invention as claimed.
Claims (7)
1. The manufacturing method of the glass cover plate of the hot-bending mobile phone is characterized by comprising the following steps:
preheating and forming a glass workpiece;
carrying out hot pressing and first heat absorption on the glass workpiece after preheating and preforming;
performing second heat absorption on the glass workpiece;
maintaining the pressure of the glass workpiece after the second heat absorption;
cooling the glass workpiece after pressure maintaining to manufacture a mobile phone glass cover plate;
the step of hot-pressing and first heat-absorbing the glass workpiece after preheating and preforming comprises the steps of hot-pressing the glass workpiece and absorbing the glass workpiece downwards;
the step of performing second heat absorption on the glass workpiece comprises the steps of firstly performing downdraught on the glass workpiece and then performing updraught on the glass workpiece;
after the glass workpiece is preheated and formed, the glass workpiece sequentially passes through a first hot-pressing suction module, a second hot-pressing suction module, a lower suction module, a first upper suction module, a second upper suction module and a third upper suction module which are arranged in a pipeline form, wherein the first hot-pressing suction module and the second hot-pressing suction module carry out hot pressing and lower suction on the glass workpiece at the same time in stages, the lower suction module carries out lower suction on the glass workpiece, and the first upper suction module, the second upper suction module and the third upper suction module carry out upper suction on the glass workpiece in stages;
the vacuum suction device comprises a first heat pressing suction module, a second heat pressing suction module, a lower suction module, a first upper suction module, a second upper suction module and a third upper suction module, wherein the first heat pressing suction module, the second heat pressing suction module, the first upper suction module, the second upper suction module and the third upper suction module are all provided with a first upper heating plate, a first lower heating plate, a vacuum suction head connected with external vacuum equipment and a first driving member for driving the first upper heating plate to lift.
2. The method for manufacturing the glass cover plate of the hot-bending mobile phone, as claimed in claim 1, is characterized in that: after the glass workpiece enters the forming chamber, the glass workpiece is heated by a plurality of preheating modules which are sequentially arranged in a pipeline form, so that the glass workpiece is naturally bent and preformed under the self gravity after being heated and softened.
3. The method for manufacturing the glass cover plate of the hot-bending mobile phone, as claimed in claim 1, is characterized in that: when the first driving members of the second hot pressing suction module, the lower suction module, the first upper suction module, the second upper suction module and the third upper suction module respectively drive the first upper heating plates to press down, the allowance of 0.1+/-0.01 mm is reserved between the upper die plate and the lower die plate.
4. The method for manufacturing the glass cover plate of the hot-bending mobile phone, as claimed in claim 1, is characterized in that: the upper template and the lower template are made of breathable materials.
5. The method for manufacturing the glass cover plate of the hot-bending mobile phone, as claimed in claim 1, is characterized in that: the glass workpiece is subjected to downdraft forming and then passes through a pressure maintaining module, the pressure maintaining module is provided with a second upper heating plate, a second lower heating plate and a second driving member for driving the second upper heating plate to lift, and the second upper heating plate and the second lower heating plate respectively heat the upper die plate and the lower die plate.
6. The method for manufacturing the glass cover plate of the hot-bending mobile phone, as claimed in claim 1, is characterized in that: the cooling medium used for cooling the glass workpiece is water.
7. The method for manufacturing the glass cover plate of the hot-bending mobile phone, as claimed in claim 1, is characterized in that: the preheating, hot pressing, the first heat absorption, the second heat absorption, the pressure maintaining and the cooling of the glass workpiece are all carried out in a forming chamber filled with nitrogen.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910188719.5A CN110040945B (en) | 2019-03-13 | 2019-03-13 | Manufacturing method of glass cover plate of hot-bending mobile phone |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910188719.5A CN110040945B (en) | 2019-03-13 | 2019-03-13 | Manufacturing method of glass cover plate of hot-bending mobile phone |
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| CN110040945A CN110040945A (en) | 2019-07-23 |
| CN110040945B true CN110040945B (en) | 2023-06-30 |
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| CN112448072A (en) * | 2019-09-03 | 2021-03-05 | Oppo广东移动通信有限公司 | Electronic device, battery cover, and method of manufacturing the same |
| CN112441725A (en) * | 2019-09-03 | 2021-03-05 | Oppo广东移动通信有限公司 | Electronic device, battery cover, and method of manufacturing the same |
| CN111592212A (en) * | 2020-05-29 | 2020-08-28 | 湖南新天力科技有限公司 | 3D glass hot bending method |
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| GB1337199A (en) * | 1970-04-23 | 1973-11-14 | Saint Gobain | Process and apparatus for curving a sheet of glass |
| CN108467187A (en) * | 2018-05-26 | 2018-08-31 | 深圳市环球同创机械有限公司 | A kind of glass heat bender |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2412682B1 (en) * | 2010-07-29 | 2019-01-23 | Saint-Gobain Glass France | Method for bending glass panes |
| KR101361854B1 (en) * | 2013-08-16 | 2014-02-11 | 최호림 | Mold apparatus for foming glass, glass forming system and glass foming method |
| KR20170131128A (en) * | 2016-05-20 | 2017-11-29 | 임홍주 | Method and Apparatus for Forming the 3D Glass |
| CN106746532B (en) * | 2017-03-03 | 2019-10-15 | 东莞恩特贝斯智能技术有限公司 | A kind of 3D bend glass hot-press method |
| CN208308673U (en) * | 2018-05-26 | 2019-01-01 | 深圳市环球同创机械有限公司 | A kind of glass pieces shaping mechanism inhaled based on heat with hot pressing |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1337199A (en) * | 1970-04-23 | 1973-11-14 | Saint Gobain | Process and apparatus for curving a sheet of glass |
| CN108467187A (en) * | 2018-05-26 | 2018-08-31 | 深圳市环球同创机械有限公司 | A kind of glass heat bender |
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