CN106746535B - Pressure control device and method for forming curved glass of mobile terminal - Google Patents
Pressure control device and method for forming curved glass of mobile terminal Download PDFInfo
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- CN106746535B CN106746535B CN201710125024.3A CN201710125024A CN106746535B CN 106746535 B CN106746535 B CN 106746535B CN 201710125024 A CN201710125024 A CN 201710125024A CN 106746535 B CN106746535 B CN 106746535B
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- 239000011521 glass Substances 0.000 title claims abstract description 105
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000007731 hot pressing Methods 0.000 claims abstract description 155
- 238000003825 pressing Methods 0.000 claims abstract description 22
- 230000008569 process Effects 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims description 82
- 238000010438 heat treatment Methods 0.000 claims description 52
- 238000000465 moulding Methods 0.000 claims description 17
- 238000012545 processing Methods 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 2
- 238000007493 shaping process Methods 0.000 claims 1
- 238000007496 glass forming Methods 0.000 abstract description 8
- 125000006850 spacer group Chemical group 0.000 description 6
- 239000005357 flat glass Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 244000141359 Malus pumila Species 0.000 description 1
- 235000021016 apples Nutrition 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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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
- C03B23/0302—Re-forming glass sheets by bending by press-bending between shaping moulds between opposing full-face shaping moulds
-
- 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
- C03B23/0307—Press-bending involving applying local or additional heating, cooling or insulating means
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
The invention discloses a pressure control device and a method for forming curved glass of a mobile terminal, wherein the pressure control device comprises the following components: the first hot-pressing module, the second hot-pressing module and the third hot-pressing module are used for hot-pressing and forming the single-piece plane glass blank into a 3D curved surface glass product in a staged manner, and the first hot-pressing module, the second hot-pressing module and the third hot-pressing module are arranged in a pipeline form; the first proportional valve and the first electromagnetic valve are used for controlling the pressure when the first hot pressing module performs the pressing operation; the second proportional valve and the second electromagnetic valve are used for controlling the pressure of the second hot pressing module when the second hot pressing module performs the pressing operation; and the third proportional valve and the third electromagnetic valve are used for controlling the pressure of the third hot pressing module when the third hot pressing module performs the pressing operation. According to the invention, the pressurizing pressure of the hot-pressing module to the 3D curved surface forming die is proportionally controlled through the proportional valve and the electromagnetic valve, so that the material internal stress in the 3D curved surface glass forming process is reduced, the generation of tiny cracks is reduced, and the yield of the curved surface glass is improved.
Description
Technical Field
The invention relates to the technical fields of a 3D curved glass screen, a rear cover, a protection screen, processing equipment and a processing process of the processing equipment of the mobile terminal, in particular to a pressure control device and a pressure control method for forming curved glass of the mobile terminal.
Background
Along with the development of mobile terminals (smart phones, tablet personal computers and the like), curved-surface screen smart phones are put forward except for samsung and LG, and like the smart phones pushed by apples, more non-planar glass with circular arc chamfers at edges is adopted, namely, the middle area of the glass is a plane, and curved surfaces are adopted for transition at the edge parts, and the non-planar glass belongs to the fields of the 3D curved-surface glass of the smart phones.
The preheating upper heating plate forming the preheating mechanism in the prior art for processing curved glass product equipment is preheated in a state of not contacting with the mold, so that the heat conduction efficiency is very low, the mold cannot be quickly raised to the required preheating temperature, the mold formed after being heated to the high temperature by the forming mechanism is sent to the cooling line for cooling, the glass formed by the rapid change of the temperature and provided with the curved surface part is frequently broken, and the integral forming time period of the curved glass is prolonged.
In addition, because the processing difficulty of the 3D curved glass is high, the process route is complex, the forming pressure is difficult to control, and the existing non-planar glass generally adopts a cold processing mode, namely, the edge of the planar glass is ground and polished to obtain the required cambered surface edge; however, the adoption of the cold processing mode is easy to leave tiny cracks on the non-planar glass, so that the yield of the non-planar glass is greatly reduced; moreover, the size of the arc fillet that can be machined by the cold working method is limited.
Accordingly, there is a need for improvement and development in the art.
Disclosure of Invention
The invention aims to solve the technical problems of the prior art, and provides a pressure control device and a pressure control method for forming curved glass of a mobile terminal, which aim to control the pressurizing pressure of a hot pressing module to a 3D curved surface forming die in proportion through a proportional valve and an electromagnetic valve, reduce the internal stress of materials in the 3D curved surface glass forming process, reduce the generation of tiny cracks and improve the yield of the curved surface glass.
The technical scheme adopted for solving the technical problems is as follows:
a pressure control device for forming curved glass of a mobile terminal comprises: the first hot-pressing module, the second hot-pressing module and the third hot-pressing module are used for hot-pressing and forming the single-piece plane glass blank into a 3D curved surface glass product in a staged manner, and the first hot-pressing module, the second hot-pressing module and the third hot-pressing module are arranged in a pipeline form;
the pressure control device further includes: the first proportional valve and the first electromagnetic valve are used for controlling the pressure when the first hot pressing module performs the pressing operation;
the second proportional valve and the second electromagnetic valve are used for controlling the pressure of the second hot pressing module when the second hot pressing module performs the pressing operation;
and the third proportional valve and the third electromagnetic valve are used for controlling the pressure of the third hot pressing module when the third hot pressing module performs the pressing operation.
The pressure control device for forming the curved glass of the mobile terminal comprises a first hot-pressing module, a second hot-pressing module and a third hot-pressing module, wherein the output pressure of the first hot-pressing module, the output pressure of the second hot-pressing module and the output pressure of the third hot-pressing module are all 0.001Mpa-0.8Mpa.
The pressure control device for forming the curved glass of the mobile terminal comprises a pressure control device, wherein the single-piece plane glass blank is placed in a 3D curved forming die; the 3D curved surface forming die comprises an upper die and a lower die, a concave cavity is formed in one face, facing the upper die, of the lower die, a boss is arranged in one face, facing the lower die, of the upper die, the boss is matched with the concave cavity and used for being placed in a state that the upper die and the lower die are clamped, a single piece of flat glass blank is hot-pressed into 3D curved surface glass, a closed clearance concave cavity is symmetrically formed in the middle of the bottom face of the lower die, and the upper die and the lower die are formed by machining blocky graphite.
The pressure control device for forming the curved glass of the mobile terminal comprises a cylinder, an upper cooling plate, an upper heating plate, a lower heating plate and a lower cooling plate;
the cylinder is vertically arranged, the upper cooling plate, the upper heating plate, the lower heating plate and the lower cooling plate are all arranged in a closed forming chamber which can be ventilated, the upper cooling plate is connected to the lower end of the cylinder, and the upper heating plate is connected below the upper cooling plate;
the bottom surface of the upper heating plate is used for contacting with the top surface of the 3D curved surface forming die, the top surface of the lower heating plate is used for contacting with the bottom surface of the 3D curved surface forming die, and the lower heating plate is connected onto the lower cooling plate; the second hot pressing module and the third hot pressing module are all configured by adopting the same parts as the first hot pressing module.
The pressure control device for forming the curved glass of the mobile terminal is characterized in that a first proportional valve for controlling pressure output is connected with a first electromagnetic valve for converting and outputting the pressure, the first electromagnetic valve is connected with a first hot-pressing module, and the pressure output by the first proportional valve is added to a cylinder in the first hot-pressing module to control an upper heating plate to rise or press down;
the connection control relation of the second proportional valve, the second electromagnetic valve, the second hot pressing module and the third proportional valve, the third electromagnetic valve and the third hot pressing module is the same as the connection control relation of the first proportional valve, the first electromagnetic valve and the first hot pressing module.
And the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve are all in an electronic positive pressure control mode.
A pressure control method for forming curved glass of a mobile terminal, wherein the method comprises the following steps:
step A, a 3D curved surface forming die with a single-sheet planar glass blank is placed in a forming chamber, and the single-sheet planar glass blank is subjected to hot press forming in stages sequentially through a first hot press die set, a second hot press die set and a third hot press die set which are arranged in a flow line mode;
step B, when the 3D curved surface forming die is pressed by the first hot pressing module, controlling pressure to be output to the first electromagnetic valve through the first proportional valve, and controlling a cylinder in the first hot pressing module to drive the upper heating plate to press downwards after the pressure is converted through the first electromagnetic valve;
step C, when the first hot press molding of the single-piece planar glass blank is finished, the second hot press module is controlled to press down through the second proportional valve and the second electromagnetic valve, and when the third hot press module is used for pressing down, the third hot press module is controlled to press down through the third proportional valve and the third electromagnetic valve;
and D, after the three-time hot press molding is finished, the 3D curved surface molding die is rapidly cooled in a heat conduction mode and a water cooling mode, so that the single-sheet planar glass blank is subjected to hot press molding in stages to form a 3D curved surface glass product.
The pressure control device for forming the curved glass of the mobile terminal comprises a first hot-pressing module, a second hot-pressing module and a third hot-pressing module, wherein the output pressure of the first hot-pressing module, the output pressure of the second hot-pressing module and the output pressure of the third hot-pressing module are all 0.001Mpa-0.8Mpa.
The pressure control device for forming the curved glass of the mobile terminal is characterized in that a first proportional valve for controlling pressure output is connected with a first electromagnetic valve for converting and outputting the pressure, the first electromagnetic valve is connected with a first hot-pressing module, and the pressure output by the first proportional valve is added to a cylinder in the first hot-pressing module to control an upper heating plate to rise or press down;
the connection control relation of the second proportional valve, the second electromagnetic valve, the second hot pressing module and the third proportional valve, the third electromagnetic valve and the third hot pressing module is the same as the connection control relation of the first proportional valve, the first electromagnetic valve and the first hot pressing module.
And the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve are all in an electronic positive pressure control mode.
The invention discloses a pressure control device and a method for forming curved glass of a mobile terminal, wherein the pressure control device comprises the following components: the first hot-pressing module, the second hot-pressing module and the third hot-pressing module are used for hot-pressing and forming the single-piece plane glass blank into a 3D curved surface glass product in a staged manner, and the first hot-pressing module, the second hot-pressing module and the third hot-pressing module are arranged in a pipeline form; the first proportional valve and the first electromagnetic valve are used for controlling the pressure when the first hot pressing module performs the pressing operation; the second proportional valve and the second electromagnetic valve are used for controlling the pressure of the second hot pressing module when the second hot pressing module performs the pressing operation; and the third proportional valve and the third electromagnetic valve are used for controlling the pressure of the third hot pressing module when the third hot pressing module performs the pressing operation. According to the invention, the pressurizing pressure of the hot-pressing module to the 3D curved surface forming die is proportionally controlled through the proportional valve and the electromagnetic valve, so that the material internal stress in the 3D curved surface glass forming process is reduced, the generation of tiny cracks is reduced, and the yield of the curved surface glass is improved.
Drawings
Fig. 1 is a schematic view of a part of a curved glass forming apparatus of a mobile terminal according to the present invention.
Fig. 2 is a schematic structural view of a curved glass forming apparatus of a mobile terminal according to the present invention.
Fig. 3 is a schematic structural diagram of a pressure control device for forming curved glass of a mobile terminal according to the present invention.
FIG. 4 is a flow chart of a method for controlling pressure in forming curved glass of a mobile terminal according to a preferred embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clear and clear, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1, fig. 1 is a schematic view of a part of a curved glass forming apparatus of a mobile terminal according to the present invention, only a main part of the forming apparatus is shown in fig. 1, and a single flat glass blank is placed in a pre-made 3D curved glass forming mold (not shown) and is passed through the hot press apparatus to form a 3D curved glass product.
The 3D curved surface forming die comprises an upper die and a lower die, a concave cavity is formed in one face, facing the upper die, of the lower die, a boss is arranged in one face, facing the lower die, of the upper die, the boss is matched with the concave cavity and used for hot-pressing a single piece of flat glass blank placed in the boss into 3D curved surface glass in a mode of clamping the upper die and the lower die, a closed clearance concave cavity is symmetrically formed in the middle of the bottom face of the lower die, the contact area and the position of the lower die and a main lower heating plate 114 of the profiling equipment can be controlled by the clearance concave cavity, the pressure distribution of the upper die and the lower die during clamping can be controlled, therefore, the hot-pressing die set can be fully arranged in a pipeline mode, hot-pressing forming is carried out on the flat glass placed in the forming die in a hot-pressing mode in a staged mode, the material internal stress of the 3D curved surface glass in the forming process is greatly reduced, fine cracks are further greatly generated on the edge of the glass, and the yield of the non-flat glass is obviously improved. In addition, the upper die and the lower die are formed by machining blocky graphite.
The molding equipment mainly comprises a first hot-pressing module 110, a second hot-pressing module 120 and a third hot-pressing module 130 which are arranged in a flow line mode, wherein a 3D curved surface molding die provided with a single-sheet planar glass blank sequentially passes through the first hot-pressing module 110, the second hot-pressing module 120 and the third hot-pressing module 130 along the direction of an arrow in the figure and is used for hot-pressing and molding the single-sheet planar glass blank into a 3D curved surface glass product of a mobile terminal in stages.
Specifically, the first hot pressing module 110 includes a cylinder 111, an upper cooling plate 112, an upper heating plate 113, a lower heating plate 114, and a lower cooling plate 115, where the cylinder 111 is vertically disposed, the upper cooling plate 112, the upper heating plate 113, the lower heating plate 114, and the lower cooling plate 115 are all disposed in a closed and ventilated molding chamber 400, the upper cooling plate 112 is connected to the lower end of the cylinder 111, and the upper heating plate 113 is connected below the upper cooling plate 112.
When the 3D curved surface forming mold performs hot press forming, the bottom surface of the upper heating plate 113 is used for contacting with the top surface of the 3D curved surface forming mold, the top surface of the lower heating plate 114 is used for contacting with the bottom surface of the 3D curved surface forming mold, and the lower heating plate 114 is connected to the lower cooling plate 115; the second hot press module 120 and the third hot press module 130 are configured by the same components as the first hot press module 110.
The pressing temperatures of the first hot pressing module 110, the second hot pressing module 120 and the third hot pressing module 130 are 950 ℃, the output pressure is 0.001Mpa-0.8Mpa, and the output pressure is selected from 0.001Mpa-0.8Mpa according to different requirements of products.
Preferably, a double-sided grating plate 116 is disposed between the upper heating plate 113 and the upper cooling plate 112, and a double-sided grating plate 117 is disposed between the lower heating plate 114 and the lower cooling plate 115, and grating grooves are respectively formed on two sides of the double-sided grating plates 116 and 117, so that the temperature rise speed of the 3D curved surface forming mold can be slowed down after assembly.
In a preferred embodiment of the method for forming a 3D curved glass of a mobile terminal of the present invention, the profiling apparatus further includes: the first preheating module 210, the second preheating module 220, the third preheating module 230 and the fourth preheating module 240 which are arranged in a pipeline form, the first hot-pressing module 110 is located after the fourth preheating module 240, and the 3D curved surface forming die sequentially passes through the first preheating module 210, the second preheating module 220, the third preheating module 230 and the fourth preheating module 240 before passing through the first hot-pressing module 110, and is used for heating the 3D curved surface forming die in stages in a heat conduction mode.
Specifically, the first preheating module 210 includes a secondary cylinder 211, a secondary upper cooling plate 212, a secondary upper heating plate 213, a secondary lower heating plate 214, and a secondary lower cooling plate 215, where the secondary cylinder 211 is vertically disposed, and the secondary upper cooling plate 212, the secondary upper heating plate 213, the secondary lower heating plate 214, and the secondary lower cooling plate 215 are also disposed in the molding chamber 400, and the secondary upper cooling plate 212 is connected to the lower end of the secondary cylinder 211, and the secondary upper heating plate 213 is connected below the secondary upper cooling plate 212.
When the 3D curved surface forming mold is preheated, the bottom surface of the auxiliary upper heating plate 213 is used for contacting with the top surface of the 3D curved surface forming mold, the top surface of the auxiliary lower heating plate 214 is used for contacting with the bottom surface of the 3D curved surface forming mold, and the auxiliary lower heating plate 214 is connected to the auxiliary lower cooling plate 215; the second preheating module 220 and the third preheating module 230 are both configured with the same parts as the first preheating module 210, the fourth preheating module 240 is configured with the same parts as the first hot-pressing module 110 to slow down the temperature rise speed of the 3D curved surface forming mold, and the fourth preheating module 240 is configured with the auxiliary cylinder 211 to replace the cylinder 111, so as to avoid applying excessive pressure to the 3D curved surface forming mold before formal hot-pressing.
The 3D curved surface forming die and the plane glass blank need to be uniformly preheated before being pressed, and the 3D curved surface forming die and the plane glass blank can be controlled to be protected and heated through pressure maintaining. The preheating temperature of the first preheating module 210 is 650 ℃, and the output pressure is 4-15kg; the preheating temperature of the second preheating module 220 is 750 ℃, and the output pressure is 4-15kg; the preheating temperature of the third preheating module 230 is 850 ℃, and the output pressure is 4-15kg; the preheating temperature of the fourth preheating module 240 is 950 ℃, and the output pressure is 4-20kg; the preheating temperature of the 3D curved surface forming die is gradually preheated from low to high in sequence, and slow temperature rise of the 3D curved surface forming die and the planar glass blank is facilitated.
Preferably, the auxiliary upper heating plate 213 is connected to the auxiliary upper cooling plate 212 through a plurality of spacers 216, and the auxiliary lower heating plate 214 is connected to the auxiliary lower cooling plate 215 through a plurality of spacers 217, and the spacers 216 and 217 have a contact area which is smaller than that of the double-sided grating plates 116 and 117, so that the spacers 216 and 217 can increase the temperature rising speed of the 3D curved surface forming mold during the preheating stage relative to the double-sided grating plates 116 and 117.
In a preferred embodiment of the method for forming a 3D curved glass of a mobile terminal of the present invention, the forming apparatus further includes: the first cooling module 310, the second cooling module 320, the third cooling module 330 and the fourth cooling module 340 that are arranged in the form of a pipeline, the first cooling module 310 is located behind the third hot pressing module 130, and the 3D curved surface forming die sequentially passes through the first cooling module 310, the second cooling module 320, the third cooling module 330 and the fourth cooling module 340 after passing through the third hot pressing module 130, and is used for cooling the 3D curved surface forming die in stages in a heat conduction manner.
Preferably, the first cooling module 310 adopts the same component configuration as the first hot pressing module 110 to ensure that a stable pressure maintaining effect is achieved on the 3D curved surface forming mold in the initial stage of cooling, and the second cooling module 320 adopts the same component configuration as the fourth preheating module 240 to accelerate the temperature withdrawal speed of the 3D curved surface forming mold.
When the 3D curved surface forming mold passes through the first cooling module 310, the 3D curved surface forming mold is cooled by heat transfer with an upper cooling plate and a lower cooling plate in the first cooling module 310;
when the 3D curved surface forming mold passes through the second cooling module 320, the 3D curved surface forming mold is cooled by heat transfer with the auxiliary upper cooling plate and the auxiliary lower cooling plate in the second cooling module 320;
when the 3D curved surface forming mold passes through the third cooling module 330 and the fourth cooling module 340, water cooling is performed by liquid cooling plates (liquid with cooling effect is selected as the liquid cooling plates) arranged in the third cooling module 330 and the fourth cooling module 340, and tap water is preferable in the invention.
Specifically, a double-sided grating plate 116 is disposed between the upper heating plate 113 and the upper cooling plate 112 of the first cooling module 310, a double-sided grating plate 117 is disposed between the lower heating plate 114 and the lower cooling plate 115, a spacer 216 is disposed between the auxiliary upper heating plate 213 and the auxiliary upper cooling plate 212 of the second cooling module 320, and a spacer 217 is disposed between the auxiliary lower heating plate 214 and the auxiliary lower cooling plate 215.
As shown in fig. 2, the process of processing curved glass by the forming apparatus of the present invention is: the method comprises the steps of firstly placing a single-piece planar glass blank in a 3D curved surface forming die, then placing the 3D curved surface forming die with the single-piece planar glass blank placed on a feed port platform 1, and after sensing the 3D curved surface forming die through an induction device, controlling a push rod by an air cylinder to push the 3D curved surface forming die into a forming chamber 400;
after the 3D curved surface forming mold is sent into the forming chamber 400, the 3D curved surface forming mold is heated in stages in a heat conduction manner by sequentially passing through the first preheating module 210, the second preheating module 220, the third preheating module 230 and the fourth preheating module 240, which are arranged in a pipeline form, so as to slowly preheat the single-sheet planar glass blank;
after the 3D curved surface forming mold is preheated, the pressing pressures of the three hot pressing modules are controlled by the pressure control device 5 of the invention to be used for hot-pressing and forming the single-piece planar glass blank into a 3D curved surface glass product (namely, the periphery of the single-piece planar glass blank is provided with an arc curved surface) in stages through the first hot pressing module 110, the second hot pressing module 120 and the third hot pressing module 130 which are arranged in a pipeline manner;
after the 3D curved surface forming mold passes through the third hot pressing module 130, the 3D curved surface forming mold is cooled in stages in a heat conduction manner sequentially through the first cooling module 310, the second cooling module 320, the third cooling module 330 and the fourth cooling module 340, which are arranged in a pipeline form, so that the temperature of the 3D curved surface forming mold is gradually reduced, after the 3D curved surface forming mold is cooled for four times, the liquid cooling channel 2 (auxiliary cooling device) is used for carrying out auxiliary cooling on the formed 3D curved surface glass product, and then the product discharging is completed through the discharging port 3.
As shown in fig. 3, the pressure control device 5 for forming curved glass of a mobile terminal of the present invention in fig. 3 includes: the first hot pressing module 110, the second hot pressing module 120 and the third hot pressing module 130 are used for hot pressing and forming the single-sheet planar glass blank into a 3D curved glass product in a staged way, and are arranged in a pipeline form;
the pressure control device 5 further includes: a first proportional valve 51 and a first solenoid valve 511 for controlling the magnitude of pressure when the first hot pressing module 110 performs the pressing operation; a second proportional valve 52 and a second electromagnetic valve 521 for controlling the pressure magnitude of the second hot pressing die set 120 during the pressing operation; a third proportional valve 53 and a third solenoid valve 531 for controlling the magnitude of pressure at the time of the profiling operation of the third hot pressing module 130.
The first electromagnetic valve 511 is connected with the first hot pressing module 110 and is used for controlling the pressure output by the first proportional valve 51 and the first electromagnetic valve 511 for converting and outputting the pressure, and the first electromagnetic valve 511 is used for adding the pressure output by the first proportional valve 51 to a cylinder in the first hot pressing module 110 and controlling an upper heating plate to ascend or descend;
the connection control relationship of the second proportional valve 52, the second electromagnetic valve 521, the second hot pressing module 120, the third proportional valve 53, the third electromagnetic valve 531, and the third hot pressing module 130 is the same as the connection control relationship of the first proportional valve 51, the first electromagnetic valve 511, and the first hot pressing module 110.
The first electromagnetic valve 511, the second electromagnetic valve 521 and the third electromagnetic valve 531 all adopt an electronic positive pressure control mode, and the control precision can reach 0.001Mpa.
Referring to fig. 4, fig. 4 is a flowchart of a pressure control method for forming curved glass of a mobile terminal according to a preferred embodiment of the invention.
As shown in fig. 4, the pressure control method for forming curved glass of a mobile terminal provided by the embodiment of the invention includes the following steps:
step S100, placing a 3D curved surface forming die with a single-sheet planar glass blank in a forming chamber, and sequentially carrying out hot press forming on the single-sheet planar glass blank in stages through a first hot press die set, a second hot press die set and a third hot press die set which are arranged in a flow line mode;
step 200, when the 3D curved surface forming die is pressed by the first hot pressing module, controlling pressure output to the first electromagnetic valve by the first proportional valve, and controlling a cylinder in the first hot pressing module to drive the upper heating plate to press down after the pressure is converted by the first electromagnetic valve;
step S300, when the first hot press molding of the single-piece planar glass blank is finished, the second hot press module is controlled to press down through the second proportional valve and the second electromagnetic valve, and when the third hot press module is used for pressing down, the third hot press module is controlled to press down through the third proportional valve and the third electromagnetic valve;
and step S400, after the three-time hot press molding is completed, the 3D curved surface molding die is rapidly cooled in a heat conduction mode and a water cooling mode, so that the single-sheet planar glass blank is subjected to hot press molding in stages to form a 3D curved surface glass product.
Meanwhile, in the compression process, the forming chamber 400 is filled with nitrogen to prevent oxidation, the forming cycle can be repeatedly performed in a state that the temperature of the 3D curved surface forming mold is high, and the single-sheet planar glass blank is pressed by a high temperature environment (950 degrees) in a state that the single-sheet planar glass blank is put into the 3D curved surface forming mold (between the upper mold and the lower mold) so that the single-sheet planar glass blank is formed into a curved state.
And a 3D curved surface forming die is arranged under each station, the processing time of all stations is consistent, and the control and adjustment can be carried out through a display control console 4 (the temperature, the pressure, the processing time and other parameters of each preheating module, the profiling module and the cooling module can be displayed), so that the processing of the plane glass blanks in a plurality of 3D curved surface forming dies is facilitated, and the processing efficiency is improved.
In practical application, the number of the profiling modules, the preheating modules and the cooling modules can be not the number of the invention according to the actual needs and the requirements of different products, only one profiling module can be arranged in profiling, other profiling modules can be used as the preheating modules or the cooling modules, and the specific number is not limited.
In summary, the present invention discloses a pressure control device and a method for forming curved glass of a mobile terminal, where the pressure control device includes: the first hot-pressing module, the second hot-pressing module and the third hot-pressing module are used for hot-pressing and forming the single-piece plane glass blank into a 3D curved surface glass product in a staged manner, and the first hot-pressing module, the second hot-pressing module and the third hot-pressing module are arranged in a pipeline form; the first proportional valve and the first electromagnetic valve are used for controlling the pressure when the first hot pressing module performs the pressing operation; the second proportional valve and the second electromagnetic valve are used for controlling the pressure of the second hot pressing module when the second hot pressing module performs the pressing operation; and the third proportional valve and the third electromagnetic valve are used for controlling the pressure of the third hot pressing module when the third hot pressing module performs the pressing operation. According to the invention, the pressurizing pressure of the hot-pressing module to the 3D curved surface forming die is proportionally controlled through the proportional valve and the electromagnetic valve, so that the material internal stress in the 3D curved surface glass forming process is reduced, the generation of tiny cracks is reduced, and the yield of the curved surface glass is improved.
It is to be understood that the invention is not limited in its application to the examples described above, but is capable of modification and variation in light of the above teachings by those skilled in the art, and that all such modifications and variations are intended to be included within the scope of the appended claims.
Claims (9)
1. The utility model provides a pressure control device of mobile terminal curved surface glass shaping which characterized in that includes: the first hot-pressing module, the second hot-pressing module and the third hot-pressing module are used for hot-pressing and forming the single-piece plane glass blank into a 3D curved surface glass product in a staged manner, and the first hot-pressing module, the second hot-pressing module and the third hot-pressing module are arranged in a pipeline form;
the pressure control device further includes: the first proportional valve and the first electromagnetic valve are used for controlling the pressure when the first hot pressing module performs the pressing operation;
the second proportional valve and the second electromagnetic valve are used for controlling the pressure of the second hot pressing module when the second hot pressing module performs the pressing operation;
a third proportional valve and a third electromagnetic valve for controlling the pressure of the third hot pressing module when the third hot pressing module performs the pressing operation;
the single-piece plane glass blank is placed in a 3D curved surface forming die; the 3D curved surface forming die comprises an upper die and a lower die, wherein a concave cavity is formed in one surface of the lower die facing the upper die, a boss is arranged in one surface of the upper die facing the lower die, the boss is matched with the concave cavity and is used for hot-pressing a single-piece planar glass blank into 3D curved surface glass in a state that the upper die and the lower die are clamped, a closed clearance concave cavity is symmetrically formed in the middle of the bottom surface of the lower die, and the upper die and the lower die are formed by adopting blocky graphite through mechanical processing;
the clearance concave cavity is used for controlling the contact area and the position of the lower die and the main lower heating plate of the profiling equipment and controlling the pressure distribution when the upper die and the lower die are clamped, so that the hot-pressing modules are arranged in a flow line mode, the planar glass placed in the forming die is hot-pressed and formed in a staged hot-pressing mode, the material internal stress of the 3D curved glass in the forming process is reduced, fine cracks are generated at the edge of the glass, and the yield of non-planar glass is improved.
2. The pressure control device for forming curved glass of mobile terminal according to claim 1, wherein the output pressure of the first hot pressing module, the second hot pressing module and the third hot pressing module is 0.001Mpa-0.8Mpa.
3. The pressure control device for forming curved glass of mobile terminal according to claim 1, wherein the first hot pressing module comprises a cylinder, an upper cooling plate, an upper heating plate, a lower heating plate and a lower cooling plate;
the cylinder is vertically arranged, the upper cooling plate, the upper heating plate, the lower heating plate and the lower cooling plate are all arranged in a closed forming chamber which can be ventilated, the upper cooling plate is connected to the lower end of the cylinder, and the upper heating plate is connected below the upper cooling plate;
the bottom surface of the upper heating plate is used for contacting with the top surface of the 3D curved surface forming die, the top surface of the lower heating plate is used for contacting with the bottom surface of the 3D curved surface forming die, and the lower heating plate is connected onto the lower cooling plate; the second hot pressing module and the third hot pressing module are all configured by adopting the same parts as the first hot pressing module.
4. The pressure control device for forming the curved glass of the mobile terminal according to claim 3, wherein the pressure control device is used for controlling the pressure output first proportional valve and the first electromagnetic valve used for converting and outputting the pressure, the first electromagnetic valve is connected with the first hot pressing module and used for adding the pressure output by the first proportional valve to a cylinder in the first hot pressing module to control the upper heating plate to rise or press down;
the connection control relation of the second proportional valve, the second electromagnetic valve, the second hot pressing module and the third proportional valve, the third electromagnetic valve and the third hot pressing module is the same as the connection control relation of the first proportional valve, the first electromagnetic valve and the first hot pressing module.
5. The pressure control device for forming curved glass of mobile terminal according to claim 4, wherein the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve are all electronic positive pressure control modes.
6. A pressure control method of a pressure control device for forming curved glass of a mobile terminal according to any one of claims 1 to 5, the method comprising:
step A, a 3D curved surface forming die with a single-sheet planar glass blank is placed in a forming chamber, and the single-sheet planar glass blank is subjected to hot press forming in stages sequentially through a first hot press die set, a second hot press die set and a third hot press die set which are arranged in a flow line mode;
step B, when the 3D curved surface forming die is pressed by the first hot pressing module, controlling pressure to be output to the first electromagnetic valve through the first proportional valve, and controlling a cylinder in the first hot pressing module to drive the upper heating plate to press downwards after the pressure is converted through the first electromagnetic valve;
step C, when the first hot press molding of the single-piece planar glass blank is finished, the second hot press module is controlled to press down through the second proportional valve and the second electromagnetic valve, and when the third hot press module is used for pressing down, the third hot press module is controlled to press down through the third proportional valve and the third electromagnetic valve;
and D, after the three-time hot press molding is finished, the 3D curved surface molding die is rapidly cooled in a heat conduction mode and a water cooling mode, so that the single-sheet planar glass blank is subjected to hot press molding in stages to form a 3D curved surface glass product.
7. The method according to claim 6, wherein the output pressures of the first, second and third hot press modules are all 0.001Mpa-0.8Mpa.
8. The method for controlling the pressure of forming curved glass of a mobile terminal according to claim 6, wherein the first solenoid valve for controlling the pressure output is connected with the first proportional valve for converting the pressure output, and the first solenoid valve is connected with the first hot pressing module and is used for adding the pressure output by the first proportional valve to a cylinder in the first hot pressing module to control the upper heating plate to rise or press down;
the connection control relation of the second proportional valve, the second electromagnetic valve, the second hot pressing module and the third proportional valve, the third electromagnetic valve and the third hot pressing module is the same as the connection control relation of the first proportional valve, the first electromagnetic valve and the first hot pressing module.
9. The method for controlling pressure for forming curved glass of mobile terminal according to claim 8, wherein the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve are all electronic positive pressure control modes.
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02102009A (en) * | 1988-10-12 | 1990-04-13 | Canon Inc | Mold for pressure molding and pressure molding method |
| CN103512764A (en) * | 2013-09-09 | 2014-01-15 | 东莞市升微机电设备科技有限公司 | Pressure control system and method of furniture mechanic testing machine |
| CN103624663A (en) * | 2013-10-24 | 2014-03-12 | 株洲众欣科技发展有限责任公司 | Glass polisher with programming control system |
| CN203600657U (en) * | 2013-09-22 | 2014-05-21 | 四川长虹电器股份有限公司 | Plasma screen hot press air pressure proportion control device |
| CN103974915A (en) * | 2012-01-05 | 2014-08-06 | 旭硝子株式会社 | Apparatus for moulding glass case and method for moulding same |
| CN104445888A (en) * | 2014-12-16 | 2015-03-25 | 蓝思科技（长沙）有限公司 | Forming method for bent glass |
| CN104556644A (en) * | 2013-10-23 | 2015-04-29 | Daeho科技株式会社 | Molding device of glass molding articles |
| CN105358500A (en) * | 2013-05-07 | 2016-02-24 | 康宁股份有限公司 | Compensated molds for manufacturing ion exchange strengthened, 3D glass covers |
| CN205326468U (en) * | 2015-12-30 | 2016-06-22 | 深圳连硕三悠自动化科技有限公司 | Pressure control system and adopt vacuum printing machine of this pressure control system |
| CN205740730U (en) * | 2016-06-23 | 2016-11-30 | 蓝思科技（长沙）有限公司 | A kind of four spring glass heat moulds |
| CN206607156U (en) * | 2017-03-03 | 2017-11-03 | 东莞恩特贝斯智能技术有限公司 | A pressure control device for mobile terminal curved glass forming |
-
2017
- 2017-03-03 CN CN201710125024.3A patent/CN106746535B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02102009A (en) * | 1988-10-12 | 1990-04-13 | Canon Inc | Mold for pressure molding and pressure molding method |
| CN103974915A (en) * | 2012-01-05 | 2014-08-06 | 旭硝子株式会社 | Apparatus for moulding glass case and method for moulding same |
| CN105358500A (en) * | 2013-05-07 | 2016-02-24 | 康宁股份有限公司 | Compensated molds for manufacturing ion exchange strengthened, 3D glass covers |
| CN103512764A (en) * | 2013-09-09 | 2014-01-15 | 东莞市升微机电设备科技有限公司 | Pressure control system and method of furniture mechanic testing machine |
| CN203600657U (en) * | 2013-09-22 | 2014-05-21 | 四川长虹电器股份有限公司 | Plasma screen hot press air pressure proportion control device |
| CN104556644A (en) * | 2013-10-23 | 2015-04-29 | Daeho科技株式会社 | Molding device of glass molding articles |
| CN103624663A (en) * | 2013-10-24 | 2014-03-12 | 株洲众欣科技发展有限责任公司 | Glass polisher with programming control system |
| CN104445888A (en) * | 2014-12-16 | 2015-03-25 | 蓝思科技（长沙）有限公司 | Forming method for bent glass |
| CN205326468U (en) * | 2015-12-30 | 2016-06-22 | 深圳连硕三悠自动化科技有限公司 | Pressure control system and adopt vacuum printing machine of this pressure control system |
| CN205740730U (en) * | 2016-06-23 | 2016-11-30 | 蓝思科技（长沙）有限公司 | A kind of four spring glass heat moulds |
| CN206607156U (en) * | 2017-03-03 | 2017-11-03 | 东莞恩特贝斯智能技术有限公司 | A pressure control device for mobile terminal curved glass forming |
Non-Patent Citations (1)
| Title |
|---|
| 基于PLC的全气动压药机系统设计;魏强;《中国优秀硕士学位论文全文数据库 信息科技辑》;20110315;第21、45页 * |
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