CN106746533B - Pressurizing system for forming curved glass of mobile terminal - Google Patents

Pressurizing system for forming curved glass of mobile terminal Download PDF

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Publication number
CN106746533B
CN106746533B CN201710125012.0A CN201710125012A CN106746533B CN 106746533 B CN106746533 B CN 106746533B CN 201710125012 A CN201710125012 A CN 201710125012A CN 106746533 B CN106746533 B CN 106746533B
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curved
die
forming
profiling
cooling
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CN106746533A (en
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詹胜文
傅思健
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Dongguan Entebeisi Intelligent Technology Co ltd
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Dongguan Entebeisi Intelligent Technology Co ltd
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    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00Re-forming shaped glass
    • C03B23/02Re-forming glass sheets
    • C03B23/023Re-forming glass sheets by bending
    • C03B23/03Re-forming glass sheets by bending by press-bending between shaping moulds
    • C03B23/0307Press-bending involving applying local or additional heating, cooling or insulating means
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00Technologies relating to the processing of minerals
    • Y02P40/50Glass production, e.g. reusing waste heat during processing or shaping
    • Y02P40/57Improving the yield, e-g- reduction of reject rates

Abstract

The invention discloses a pressurizing system for forming curved glass of a mobile terminal, which comprises a plurality of profiling devices; each profiling device comprises an air cylinder, an upper cooling plate, an upper heating plate, a lower heating plate and a lower cooling plate; the profiling devices are used in curved glass forming equipment of the mobile terminal, the plurality of profiling devices are configured by the same parts, one of the profiling devices is used for carrying out hot press forming on a single plane glass blank according to different processed products, and the rest profiling devices are respectively used as a preheating device and/or a cooling device. According to the invention, the 3D curved surface forming die is heated to a preset temperature by the preheating device, and the single-sheet plane glass blank is processed and formed into a 3D curved surface glass product by the profiling device and then cooled by the cooling device, so that the production efficiency of the product is improved.

Description

Pressurizing system for forming curved glass of mobile terminal
Technical Field
The invention relates to the technical field of mobile terminal 3D curved glass screens, rear covers, protection screens and processing equipment, in particular to a pressurizing system for forming curved glass of a mobile terminal.
Background
With the development of mobile terminals (smart phones, tablet computers and the like), except for the smart phones with curved screens, which are released by samsung and LG, smart phones released by apples are more non-planar glass with arc chamfers at the edges, that is, the middle area of the glass is a plane and the edges of the glass are curved for transition, and the non-planar glass belongs to the field of the 3D curved glass of the smart phones.
The preheating upper heating plate of the preheating mechanism in the prior art is preheated in a state of not contacting with a mold in equipment for processing curved glass products, so that the heat conduction efficiency is very low, the mold cannot be quickly raised to the required preheating temperature, the molded mold heated to high temperature by the molding mechanism is sent to a cooling line for cooling, the glass with a curved surface part molded by the rapid change of the temperature is frequently damaged, and the time period for integrally molding the curved glass is also prolonged.
In addition, because the processing difficulty of the 3D curved glass is high, the process route is complex, and the forming pressure is difficult to control, 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, fine cracks are easy to remain on the non-planar glass by adopting a cold processing mode, so that the yield of the non-planar glass is greatly reduced; moreover, the size of the radian fillet which can be processed by the cold working mode is also limited.
Therefore, there is still a need for improvement and development of the prior art.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a pressurizing system for forming curved glass of a mobile terminal aiming at the defects in the prior art, wherein an upper heating plate and a lower heating plate of a profiling device in the pressurizing system are used for heating a 3D curved forming die to a preset temperature, and an upper cooling plate and a lower cooling plate are used for cooling the processed 3D curved forming die, so that a single-sheet plane glass blank placed in the 3D curved forming die is processed and formed into a 3D curved glass product, thereby reducing the material internal stress in the 3D curved glass forming process, reducing the generation of fine cracks and improving the yield of the curved glass; in addition, the profiling devices are used in curved glass forming equipment of the mobile terminal, the plurality of profiling devices are configured by the same parts, one of the profiling devices is used for carrying out hot press forming on the single-sheet flat glass blank according to different processed products, and the rest profiling devices are respectively used as a preheating device and/or a cooling device, so that the utilization rate of the profiling devices is improved.
The technical scheme adopted by the invention for solving the technical problem is as follows:
a pressing system for curved glass forming of a mobile terminal, wherein the pressing system comprises a plurality of pressing devices; each profiling device comprises an air cylinder, an upper cooling plate, an upper heating plate, a lower heating plate and a lower cooling plate;
the cylinder is vertically arranged, and the upper cooling plate, the upper heating plate, the lower heating plate and the lower cooling plate are all placed in a closed and ventilated forming chamber;
the upper cooling plate is connected to the lower end of the cylinder, the upper heating plate is connected below the upper cooling plate, the bottom surface of the upper heating plate is used for being in contact with the top surface of the 3D curved surface forming die, the top surface of the lower heating plate is used for being in contact with the bottom surface of the 3D curved surface forming die, and the lower heating plate is connected above the lower cooling plate;
the upper heating plate and the lower heating plate are used for heating the 3D curved surface forming die to a preset temperature, the upper cooling plate and the lower cooling plate are used for cooling the processed 3D curved surface forming die, and a single plane glass blank placed in the 3D curved surface forming die is processed and formed into a 3D curved surface glass product;
the profiling devices are used in curved glass forming equipment of the mobile terminal, the plurality of profiling devices are configured by the same parts, one of the profiling devices is used for carrying out hot press forming on a single plane glass blank according to different processed products, and the rest profiling devices are respectively used as a preheating device and/or a cooling device.
The pressurizing system for forming the curved glass of the mobile terminal is characterized in that the preheating device is used for uniformly preheating the 3D curved forming die and the single-sheet flat glass blank so that the temperature of the single-sheet flat glass blank reaches the temperature meeting the pressure forming requirement; the cooling device is used for cooling the 3D curved glass product formed by the forming process.
The pressing system for curved glass forming of the mobile terminal is characterized in that the preset temperature is 950 ℃.
The pressurizing system for forming the curved glass of the mobile terminal is characterized in that a double-sided grid plate for slowing down the temperature rise speed of a 3D curved forming die is arranged between the upper heating plate and the upper cooling plate and between the lower heating plate and the lower cooling plate.
The pressurizing system for molding the curved glass of the mobile terminal is characterized in that grating grooves are respectively processed on the upper surface and the lower surface of the double-sided grating plate.
The pressurizing system for forming the curved glass of the mobile terminal, wherein the forming die for the 3D curved glass comprises an upper die and a lower die, a cavity is formed in one side, facing the upper die, of the lower die, a boss is arranged on one side, facing the lower die, of the upper die, the boss is matched with the cavity and used for hot-pressing the single-piece planar glass into the 3D curved glass in the upper die and the lower die in a die closing state, and a closed clearance cavity is symmetrically formed in the middle of the bottom surface of the lower die.
The pressurizing system for forming the curved glass of the mobile terminal is characterized in that a vacuum hole for introducing vacuum pressure is formed in the central part of the lower heating plate of the profiling device, a plurality of suction holes are formed in the bottom of the 3D curved forming die, and a single-sheet plane glass blank placed in the 3D curved forming die is processed and formed into a 3D curved glass product through the vacuum pressure introduced into the suction holes during profiling.
According to the pressurizing system for forming the curved glass of the mobile terminal, vacuum pressure is introduced into the suction hole of the lower die, so that the bent part of a single-sheet flat glass blank placed in the 3D curved forming die is completely attached to the bottom surface of the lower die after being vacuum pressure-absorbed, and bending is achieved.
The pressurizing system for the curved glass forming of the mobile terminal is characterized in that the output pressure of the pressurizing device is 0.001-0.8 MPa.
The pressurizing system for forming the curved glass of the mobile terminal is characterized in that the profiling device is connected with a proportional valve and an electromagnetic valve which are used for controlling the output of the pressure during profiling operation of the profiling device.
The invention discloses a pressurizing system for forming curved glass of a mobile terminal, which comprises a plurality of profiling devices; each profiling device comprises an air cylinder, an upper cooling plate, an upper heating plate, a lower heating plate and a lower cooling plate; the profiling devices are used in curved glass forming equipment of the mobile terminal, the plurality of profiling devices are configured by the same parts, one of the profiling devices is used for carrying out hot press forming on a single plane glass blank according to different processed products, and the rest profiling devices are respectively used as a preheating device and/or a cooling device. According to the invention, the 3D curved surface forming die is heated to a preset temperature by the preheating device, and the single-sheet plane glass blank is processed and formed into a 3D curved surface glass product by the profiling device and then cooled by the cooling device, so that the production efficiency of the product is improved.
Drawings
Fig. 1 is a schematic structural diagram of a pressurizing system for forming curved glass of a mobile terminal on curved glass hot-pressing equipment.
Fig. 2 is a schematic structural diagram of a pressing device in a pressing system for forming curved glass of a mobile terminal.
Fig. 3 is a schematic structural diagram of a curved glass profiling device (comprising three profiling devices) of the mobile terminal of the invention.
Fig. 4 is a schematic structural diagram of a pressure control device for forming curved glass of a mobile terminal according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1 and 2, the pressing system comprises a plurality of pressing devices, the pressing devices are used in the curved glass forming equipment of the mobile terminal, the plurality of pressing devices adopt the same component configuration, one of the plurality of pressing devices is used for carrying out hot press forming on a single flat glass blank according to different processed products, and the rest pressing devices are respectively used as a preheating device and/or a cooling device; the profiling apparatus 110 (i.e., hereinafter referred to as a first profiling apparatus, the number of profiling apparatuses of the present invention is preferably 3) 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;
the cylinder 111 is vertically arranged, and the upper cooling plate 112, the upper heating plate 113, the lower heating plate 114 and the lower cooling plate 115 are all placed in a closed and ventilated forming chamber (as shown in fig. 1, the profiling device of the invention belongs to a part of curved glass processing equipment);
an upper cooling plate 112 is connected to the lower end of the cylinder 111, an upper heating plate 113 is connected below the upper cooling plate 112, the bottom surface of the upper heating plate 113 is used to contact the top surface of the 3D curved surface forming die 10, the top surface of a lower heating plate 114 is used to contact the bottom surface of the 3D curved surface forming die 10, and the lower heating plate 114 is connected above a lower cooling plate 115;
the upper heating plate 113 and the lower heating plate 114 are used for heating the 3D curved surface forming die 10 to a predetermined temperature, preferably 950 degrees, and the upper cooling plate 112 and the lower cooling plate 115 are used for cooling the processed 3D curved surface forming die 10, and processing and forming the single flat glass blank placed in the 3D curved surface forming die 10 into a 3D curved surface glass product.
Fig. 1 is a schematic structural diagram of a pressurizing system for forming curved glass of a mobile terminal on curved glass hot-pressing equipment. Fig. 1 shows only the main part of the molding apparatus (including three press devices, namely a first press device 110, a second press device 120, and a third press device 130, 3 press devices perform hot press molding on a single flat glass blank according to the difference of processed products, and the rest of the press devices are respectively used as a preheating device and/or a cooling device, the preheating device is used for uniformly preheating the 3D curved surface molding die and the single flat glass blank to a temperature satisfying the pressure molding, the cooling device is used for cooling the 3D curved surface glass product that has been molded), the single flat glass blank is placed in a pre-fabricated 3D curved surface molding die 10 (fig. 2), and the 3D curved surface glass product is molded after passing through the hot press apparatus.
The 3D curved surface forming die 10 comprises an upper die and a lower die, wherein a concave cavity is formed in one surface of the lower die, which faces the upper die, a boss is arranged in one surface of the upper die, which faces the lower die, the boss is matched with the concave cavity and used for hot-pressing a single sheet of flat glass blank placed in the concave cavity into 3D curved surface glass in the state that the upper die and the lower die are closed, a closed clearance concave cavity is symmetrically arranged in the middle of the bottom surface of the lower die, the clearance concave cavity can control the contact area and the position of a lower heating plate 114 of the lower die and a profiling device, and can also control the pressure distribution when the upper die and the lower die are closed, so that the profiling device can be fully utilized in a flow line form, and the flat glass placed in the forming die is subjected to hot-press forming in a staged hot-press mode, the material internal stress of the 3D curved surface glass, obviously promote the yields of non-planar glass. In addition, the upper die and the lower die are both formed by machining blocky graphite.
As shown in fig. 1, the press device of the present invention is applied to a hot press apparatus for curved glass, the hot press apparatus mainly includes a first press device 110, a second press device 120 and a third press device 130 which are arranged in a flow line, and the 3D curved surface forming mold 10 holding a single flat glass blank passes through the first press device 110, the second press device 120 and the third press device 130 in sequence along the direction of the arrow shown in the figure, and is used for hot press forming the single flat glass blank into a mobile terminal 3D curved surface glass product by stages.
The second profiling means 120 and the third profiling means 130 are each configured with the same parts as the first profiling means 110. The above description has been made and will not be described herein.
The first pressing device 110, the second pressing device 120 and the third pressing device 130 are used for pressing output pressure within the range of 0.001-0.8 Mpa, the output pressure is selected within the range of 0.001-0.8 Mpa according to different requirements of products, the pressure precision can reach 0.001Mpa, and the pressure can be effectively controlled.
In addition, a double-sided grid plate 116 is arranged between the upper heating plate 113 and the upper cooling plate 112, a double-sided grid plate 117 is arranged between the lower heating plate 114 and the lower cooling plate 115, grid grooves are respectively machined on two sides of the double-sided grid plates 116 and 117, and the temperature rise speed of the 3D curved surface forming die can be slowed down after the double-sided grid plates are assembled.
The hot press apparatus further comprises: the first pressing device 110 is located behind the fourth preheating module 240, and the 3D curved surface forming mold 10 passes through the first preheating module 210, the second preheating module 220, the third preheating module 230 and the fourth preheating module 240 in sequence before passing through the first pressing device 110, and is used for heating the 3D curved surface forming mold in stages in a heat conduction manner.
Specifically, the first preheating module 210 includes a sub-cylinder 211, a sub-upper cooling plate 212, a sub-upper heating plate 213, a sub-lower heating plate 214, and a sub-lower cooling plate 215, the sub-cylinder 211 is vertically disposed, the sub-upper cooling plate 212, the sub-upper heating plate 213, the sub-lower heating plate 214, and the sub-lower cooling plate 215 are also disposed in the forming chamber 400, the sub-upper cooling plate 212 is connected to a lower end of the sub-cylinder 211, and the sub-upper heating plate 213 is connected below the sub-upper cooling plate 212.
When the 3D curved surface forming mold 10 is preheated, the bottom surface of the sub upper heating plate 213 is used to contact with the top surface of the 3D curved surface forming mold 10, the top surface of the sub lower heating plate 214 is used to contact with the bottom surface of the 3D curved surface forming mold 10, and the sub lower heating plate 214 is connected to the sub lower cooling plate 215; the second preheating module 220 and the third preheating module 230 are both configured by parts same as the first preheating module 210, the fourth preheating module 240 is configured by parts same as the first profiling device 110 to reduce the temperature rise speed of the 3D curved surface forming die, and the fourth preheating module 240 adopts the auxiliary cylinder 211 to replace the cylinder 111, so that excessive pressure applied to the 3D curved surface forming die before formal hot pressing is avoided.
The 3D curved surface forming die 10 and the flat glass blank need to be uniformly preheated before being pressed, and the 3D curved surface forming die 10 and the flat glass blank can be controlled to be heated in a protection manner by pressure maintaining. The preheating temperature of the first preheating module 210 is 650 ℃, and the output pressure is 4-15 kg; the preheating temperature of the second preheating module 220 is 750 ℃, and the output pressure is 4-15 kg; the preheating temperature of the third preheating module 230 is 850 ℃, and the output pressure is 4-15 kg; the preheating temperature of the fourth preheating module 240 is 950 ℃, and the output pressure is 4-20 kg; the preheating temperature of the 3D curved surface forming die 10 is gradually preheated from low to high in sequence, and the slow temperature rise of the 3D curved surface forming die 10 and the plane glass blank is facilitated.
Preferably, the secondary upper heating plate 213 and the secondary upper cooling plate 212 are connected by a plurality of spacers 216, and the secondary lower heating plate 214 and the secondary lower cooling plate 215 are connected by a plurality of spacers 217, the spacers 216 and 217 have a smaller contact area than the double-sided grid plates 116 and 117, and the spacers 216 and 217 increase the temperature rise speed of the 3D curved surface forming mold compared to the double-sided grid plates 116 and 117 during the preheating stage.
The hot press apparatus further comprises: the first cooling module 310 is located behind the third profiling device 130, and the 3D curved surface forming mold 10 passes through the first cooling module 310, the second cooling module 320, the third cooling module 330 and the fourth cooling module 340 in sequence after passing through the third profiling device 130, and is used for cooling the 3D curved surface forming mold 10 in stages in a heat conduction manner.
A first cooling module 310 connected to the forming chamber 400 for performing primary cooling and stable pressure maintaining on the formed product in a heat conduction manner; a second cooling module 320 connected to the forming chamber 400 and arranged in a pipeline with the first cooling module 310 for performing secondary cooling on the formed product by means of heat conduction and accelerating the mold annealing speed; a third cooling module 330 connected to the forming chamber 400, arranged in a pipeline with the first cooling module 310 and the second cooling module 320, and configured to cool the formed product for three times by heat conduction; and a fourth cooling module 340 connected to the forming chamber 400, and arranged in a pipeline manner with the first cooling module 310, the second cooling module 320, and the third cooling module 330, for cooling the formed product four times by heat conduction.
Preferably, the first cooling module 310 adopts the same component configuration as the first profiling device 130 to ensure a stable pressure maintaining effect on the 3D curved surface forming mold 10 at 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 cooling speed of the 3D curved surface forming mold 10.
When the 3D curved surface forming mold 10 passes through the first cooling module 310, it is cooled by heat transfer with the upper cooling plate and the lower cooling plate of the first cooling module 310; when the 3D curved surface forming mold 10 passes through the second cooling module 320, the cooling is performed 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 10 passes through the third cooling module 330 and the fourth cooling module 340, water cooling is performed through liquid cooling plates (liquid cooling plates are selected from liquid with a cooling effect, and preferably tap water in the present invention) arranged in the third cooling module 330 and the fourth cooling module 340.
In the present invention, a vacuum hole for introducing vacuum pressure may be formed in the central portion of the lower heating plate 114 of the profiling apparatus 110, a plurality of suction holes may be formed in the bottom of the 3D curved surface forming mold 10, and a single flat glass blank placed in the 3D curved surface forming mold 10 may be formed into a 3D curved surface glass product by the vacuum pressure introduced into the suction holes during profiling; vacuum pressure is introduced into the suction hole of the lower mold so that the bent portion of the single flat glass blank placed in the 3D curved surface forming mold 10 is completely adhered to the bottom surface of the lower mold after vacuum pressure adsorption and bending is achieved.
In addition, the profiling device 110 is used in a curved glass forming device of a mobile terminal, a plurality of profiling devices adopt the same component configuration, one of the profiling devices is used for carrying out hot press forming on a single plane glass blank according to different processed products, and the rest profiling devices can be respectively used as a preheating device and/or a cooling device.
As shown in fig. 3, a single plane glass blank is placed in the 3D curved surface forming mold 10 in advance, then the 3D curved surface forming mold 10 with the single plane glass blank placed therein is placed on the feeding port platform 1, and after the 3D curved surface forming mold 10 is sensed by the sensing device, the push rod is controlled to push the 3D curved surface forming mold 10 into the forming chamber 400; after the 3D curved surface forming mold 10 is sent into the forming chamber 400, the 3D curved surface forming mold 10 is heated in stages in a heat conduction manner in advance 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 flow line form, and a single flat glass blank is slowly preheated;
after the 3D curved surface forming die 10 is preheated, the pressing pressure of the three pressing devices is controlled by the pressure control device of the present invention to be used for hot press forming the single-piece flat glass blank into the 3D curved surface glass product in stages (i.e. the periphery of the single-piece flat glass blank has the arc curved surface);
when the 3D curved surface forming die 10 passes through the third profiling device 130, sequentially passes 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 flow line manner to cool the 3D curved surface forming die in a heat conduction manner stage by stage, so that the temperature of the 3D curved surface forming die 10 is gradually reduced, and when the 3D curved surface forming die 10 finishes cooling for four times, the formed 3D curved surface glass product is subjected to auxiliary cooling through the liquid cooling channel 2 (auxiliary cooling device), and then the product discharging is finished through the discharging port 3.
As shown in fig. 4, the compression device is connected with a proportional valve and an electromagnetic valve for controlling the pressure output when the compression device performs compression operation. The pressure control apparatus in fig. 4 further includes: a first proportional valve 51 and a first electromagnetic valve 511 for controlling the magnitude of pressure at the time of the press-molding operation of the first press-molding device 110; a second proportional valve 52 and a second electromagnetic valve 521 for controlling the pressure during the compression operation of the second compression device 120; a third proportional valve 53 and a third electromagnetic valve 531 for controlling the magnitude of the pressure when the third press device 130 performs the press operation.
A first electromagnetic valve 511 for controlling the pressure output of the first proportional valve 51 and converting the pressure output is connected, the first electromagnetic valve 511 is connected with the first molding device 110, and is used for applying the pressure output by the first proportional valve 51 to a cylinder in the first molding device 110 to control the upper heating plate to be lifted or pressed;
the connection control relationship among the second proportional valve 52, the second electromagnetic valve 521, the second pressure type device 120, the third proportional valve 53, the third electromagnetic valve 531, and the third pressure type device 130 is the same as the connection control relationship among the first proportional valve 51, the first electromagnetic valve 511, and the first pressure type device 110.
The first electromagnetic valve 511, the second electromagnetic valve 521 and the third electromagnetic valve 531 adopt an electronic positive pressure control mode, and the control precision can reach 0.001 Mpa.
When the 3D curved surface forming die 10 is profiled by the first profiling device 110, the pressure is controlled by the first proportional valve 51 and output to the first electromagnetic valve 511, and the pressure is converted by the first electromagnetic valve 511 to control the cylinder 111 in the first profiling device 110 to drive the upper heating plate 113 to press down; when the single flat glass blank is subjected to press molding through the second press molding device 120 after the first hot press molding is finished, the second press molding device 120 is controlled to press down through the second proportional valve 52 and the second electromagnetic valve 521, and when the press molding is performed through the third press molding device 130, the third press molding device 130 is controlled to press down through the third proportional valve 53 and the third electromagnetic valve 531.
Meanwhile, in the press molding process, the molding chamber 400 is filled with nitrogen gas to prevent oxidation, the molding cycle may be repeated in a state where the temperature of the 3D curved surface molding die 10 is high, and the single flat glass blank is molded into a bent state by pressurizing through a high temperature environment (950 degrees) in a state where the single flat glass blank is placed in the 3D curved surface molding die (between the upper die and the lower die).
In summary, the invention discloses a pressurizing system for forming curved glass of a mobile terminal, which comprises a plurality of profiling devices; each profiling device comprises an air cylinder, an upper cooling plate, an upper heating plate, a lower heating plate and a lower cooling plate; the profiling devices are used in curved glass forming equipment of the mobile terminal, the plurality of profiling devices are configured by the same parts, one of the profiling devices is used for carrying out hot press forming on a single plane glass blank according to different processed products, and the rest profiling devices are respectively used as a preheating device and/or a cooling device. According to the invention, the 3D curved surface forming die is heated to a preset temperature by the preheating device, and the single-sheet plane glass blank is processed and formed into a 3D curved surface glass product by the profiling device and then cooled by the cooling device, so that the production efficiency of the product is improved.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.

Claims (6)

1. A pressurizing system for curved glass forming of a mobile terminal is characterized by comprising a plurality of profiling devices; each profiling device comprises an air cylinder, an upper cooling plate, an upper heating plate, a lower heating plate and a lower cooling plate;
the cylinder is vertically arranged, and the upper cooling plate, the upper heating plate, the lower heating plate and the lower cooling plate are all placed in a closed and ventilated forming chamber;
the upper cooling plate is connected to the lower end of the cylinder, the upper heating plate is connected below the upper cooling plate, the bottom surface of the upper heating plate is used for being in contact with the top surface of the 3D curved surface forming die, the top surface of the lower heating plate is used for being in contact with the bottom surface of the 3D curved surface forming die, and the lower heating plate is connected above the lower cooling plate;
the upper heating plate and the lower heating plate are used for heating the 3D curved surface forming die to a preset temperature, the upper cooling plate and the lower cooling plate are used for cooling the processed 3D curved surface forming die, and a single plane glass blank placed in the 3D curved surface forming die is processed and formed into a 3D curved surface glass product;
the profiling devices are used in curved glass forming equipment of the mobile terminal, a plurality of profiling devices are configured by the same parts, one of the profiling devices is used for carrying out hot press forming on a single plane glass blank according to different processed products, and the rest profiling devices are respectively used as a preheating device and/or a cooling device;
a double-sided grating plate for slowing down the temperature rise speed of the 3D curved surface forming die is arranged between the upper heating plate and the upper cooling plate and between the lower heating plate and the lower cooling plate, and grating grooves are respectively processed on the upper surface and the lower surface of the double-sided grating plate;
the profiling device is connected with a proportional valve and an electromagnetic valve which are used for controlling the pressure output when the profiling device performs profiling operation, when the 3D curved surface forming die performs profiling through the profiling device, the pressure is controlled to be output to the electromagnetic valve through the proportional valve, and after the pressure is converted through the electromagnetic valve, an air cylinder in the profiling device is controlled to drive an upper heating plate to press downwards;
the forming die for the 3D curved glass comprises an upper die and a lower die, wherein a cavity is formed in one surface of the lower die, which faces the upper die, a boss is arranged on one surface of the upper die, which faces the lower die, the boss is matched with the cavity and used for hot-pressing the single piece of planar glass placed in the cavity into the 3D curved glass in the state that the upper die and the lower die are closed, and a closed clearance cavity is symmetrically formed in the middle of the bottom surface of the lower die; the void-avoiding concave cavity controls the contact area and the position of a lower heating plate of the lower die and the profiling device, controls the pressure distribution when the upper die and the lower die are closed, and carries out hot press molding on the plane glass put into the molding die in a staged hot press mode;
the upper die and the lower die are both formed by machining blocky graphite.
2. The system of claim 1, wherein the preheating device is configured to uniformly preheat the 3D curved surface forming mold and the single flat glass blank to a temperature that satisfies the press forming requirement; the cooling device is used for cooling the 3D curved glass product formed by the forming process.
3. The system according to claim 1, wherein the predetermined temperature is 950 degrees.
4. The pressing system for curved glass forming of mobile terminal according to claim 1, wherein a vacuum hole for introducing vacuum pressure is formed at a central portion of the lower heating plate of the profiling apparatus, a plurality of suction holes are formed at a bottom portion of the 3D curved forming mold, and a single flat glass blank placed in the 3D curved forming mold is formed into a 3D curved glass product by the vacuum pressure introduced into the suction holes during profiling.
5. The system as claimed in claim 4, wherein a vacuum pressure is introduced into the suction hole of the lower mold such that the bent portion of the single flat glass blank placed in the 3D curved surface forming mold is completely adhered to the bottom surface of the lower mold and bent after being vacuum pressure-absorbed.
6. The system of claim 1, wherein the profiling devices output pressures are each 0.001Mpa-0.8 Mpa.
CN201710125012.0A 2017-03-03 2017-03-03 Pressurizing system for forming curved glass of mobile terminal Active CN106746533B (en)

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CN107473571A (en) * 2017-07-26 2017-12-15 广东飞新达智能设备股份有限公司 A kind of curved surface forming processing unit (plant)
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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
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