CN206607156U - A pressure control device for mobile terminal curved glass forming - Google Patents

Abstract

The utility model discloses a fashioned pressure control device of mobile terminal curved surface glass, pressure control device includes: the first hot pressing module, the second hot pressing module and the third hot pressing module are arranged in a flow line mode and are used for hot pressing and molding the single plane glass blank into a 3D curved surface glass product in stages; the first proportional valve and the first electromagnetic valve are used for controlling the pressure during the compression operation of the first hot-pressing module; the second proportional valve and the second electromagnetic valve are used for controlling the pressure of the second hot-pressing module during the compression operation; and the third proportional valve and the third electromagnetic valve are used for controlling the pressure of the third hot-pressing module during the compression operation. The utility model discloses a proportional valve and solenoid valve proportional control hot pressing module to 3D curved surface forming die's pressurization pressure, reduced the material internal stress among the 3D curved surface glass forming process, reduced the production of tiny crackle, promoted curved surface glass's yields.

Description

A pressure control device for mobile terminal curved glass forming

technical field

The utility model relates to the technical field of a mobile terminal 3D curved glass screen, a back cover, a protective screen, processing equipment and its processing process, in particular to a pressure control device for forming a mobile terminal curved glass.

Background technique

With the development of mobile terminals (smartphones, tablet computers, etc.), in addition to Samsung and LG launching smartphones with curved screens, smartphones like Apple’s use more non-flat glass with rounded edges, that is, glass The middle area is plane and the edges are transitioned by curved surfaces. The above-mentioned non-planar glasses all belong to the related and used category of the smart phone 3D curved glass of the present invention.

The existing technology is used to process curved glass products. The preheating upper heating plate that constitutes the preheating mechanism is preheated without contacting the mold, so that the heat conduction efficiency is very low, and the mold cannot be quickly raised to the required preheating temperature. After being heated to a high temperature by the forming mechanism, the formed mold is sent to the cooling line for cooling, which makes the glass with a curved surface formed by the sharp change of temperature frequently breakage, and also prolongs the overall forming time period of the curved glass .

In addition, because the processing of 3D curved glass is difficult, the process route is relatively complicated, and the forming pressure is difficult to control, the existing non-flat glass generally adopts cold processing, that is, the edge of the flat glass is ground and polished to obtain the required The arc edge; however, this cold processing method is easy to leave small cracks on the non-planar glass, which greatly reduces the yield of non-planar glass; moreover, the arc fillet size that can be processed by the cold processing method is also limited.

Therefore, the prior art still needs to be improved and developed.

Utility model content

The technical problem to be solved by the utility model is to provide a pressure control device for curved glass forming of a mobile terminal in view of the above-mentioned defects of the prior art, which aims to control the 3D curved surface of the hot pressing module in proportion through a proportional valve and a solenoid valve. The pressing pressure of the forming mold reduces the internal stress of the material during the forming process of 3D curved glass, reduces the generation of small cracks, and improves the yield of curved glass.

The technical solution adopted by the utility model to solve technical problems is as follows:

A pressure control device for forming curved glass for a mobile terminal, including: a first hot-pressing module arranged in an assembly line for stepwise hot-pressing a single flat glass blank into a 3D curved glass product, a second A hot pressing module and a third hot pressing module;

The pressure control device further includes: a first proportional valve and a first solenoid valve for controlling the pressure of the first hot-pressing module during the molding operation;

A second proportional valve and a second solenoid valve used to control the pressure of the second hot-pressing module during the molding operation;

The third proportional valve and the third electromagnetic valve are used to control the pressure of the third hot-pressing module when performing the molding operation.

In the pressure control device for forming curved glass for mobile terminals, the output pressures of the first, second and third hot-pressing modules are all 0.001Mpa-0.8Mpa.

The pressure control device for forming curved glass for mobile terminals, wherein the single flat glass blank is placed in a 3D curved surface forming mold; the 3D curved surface forming mold includes an upper mold and a lower mold, and the lower mold faces one side of the upper mold There is a concave cavity, and a convex platform is provided on the side of the upper mold facing the lower mold. Pressed into 3D curved glass, a closed hollow cavity is arranged symmetrically in the middle of the bottom surface of the lower mold, and both the upper mold and the lower mold are formed by mechanical processing using block graphite.

The pressure control device for forming curved glass for mobile terminals, wherein the first hot-pressing module includes a cylinder, an upper cooling plate, an upper heating plate, a lower heating plate, and a lower cooling plate;

The cylinder is arranged vertically, the upper cooling plate, the upper heating plate, the lower heating plate and the lower cooling plate are all placed in a closed and breathable molding chamber, the upper cooling plate is connected to the lower end of the cylinder, and the upper heating plate is connected to the upper under the cooling plate;

The bottom surface of the upper heating plate is used to contact the top surface of the 3D curved surface forming mold, the top surface of the lower heating plate is used to contact the bottom surface of the 3D curved surface forming mold, and the lower heating plate is connected on the lower cooling plate; Both the pressing die group and the third hot pressing die group adopt the same parts configuration as the first hot pressing die group.

The mobile terminal curved glass forming pressure control device, wherein the first proportional valve used to control the pressure output is connected to the first solenoid valve used to convert the pressure output, and the first solenoid valve is connected to the first thermal The compression die set is connected, and is used to add the pressure output by the first proportional valve to the cylinder in the first hot pressing die set to control the upper heating plate to rise or press down;

The connection control relationship between the second proportional valve, the second solenoid valve, the second hot-pressing module and the third proportional valve, the third solenoid valve, and the third hot-pressing module is the same as that of the first proportional valve, the first electromagnetic The connection control relationship of the valve and the first hot-pressing module is the same.

In the mobile terminal curved glass forming pressure control device, the first solenoid valve, the second solenoid valve, and the third solenoid valve all adopt an electronic positive pressure control method.

The utility model discloses a pressure control device for forming a mobile terminal curved surface glass. The pressure control device comprises: a first assembly line arranged in the form of a 3D curved surface glass product for hot pressing a single piece of flat glass blank into a 3D curved surface glass product in stages. The hot pressing module, the second hot pressing module and the third hot pressing module; the first proportional valve and the first electromagnetic valve used to control the pressure of the first hot pressing module when the pressing operation is performed; The second proportional valve and the second electromagnetic valve are used to control the pressure of the third hot pressing module when the pressing operation is performed; the third proportional valve and the third electromagnetic valve are used to control the pressure when the third hot pressing module performs the pressing operation. The utility model controls the pressing pressure of the hot pressing module on the 3D curved surface forming mold in proportion through the proportional valve and the electromagnetic valve, which reduces the internal stress of the material in the forming process of the 3D curved surface glass, reduces the generation of small cracks, and improves the Yield rate of curved glass.

Description of drawings

Fig. 1 is a partial structural diagram of the curved glass forming equipment of the mobile terminal of the present invention.

Fig. 2 is a schematic structural diagram of the curved glass forming equipment of the mobile terminal of the present invention.

Fig. 3 is a structural schematic diagram of a pressure control device for forming curved glass for a mobile terminal of the present invention.

detailed description

In order to make the purpose, technical solution and advantages of the utility model more clear and definite, the utility model will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

As shown in Figure 1, Figure 1 is a schematic diagram of the partial structure of the curved glass forming equipment of the mobile terminal of the present invention. Curved surface forming mold (not shown in the figure), and after passing through the hot pressing equipment, a 3D curved surface glass product is formed.

The 3D curved surface forming mold includes an upper mold and a lower mold, the lower mold is provided with a concave cavity on the side facing the upper mold, and the upper mold is provided with a boss on the side facing the lower mold. In the state where the mold and the lower mold are closed, the single piece of flat glass blank put into it is hot-pressed into 3D curved glass, and a closed hollow cavity is arranged symmetrically in the middle of the bottom surface of the lower mold. First, it can control the contact area and position of the lower mold and the main lower heating plate 114 of the molding equipment, and second, it can also control the pressure distribution when the upper mold and the lower mold are closed, so that the hot pressing mold can be arranged in the form of an assembly line The flat glass placed in the forming mold is hot-pressed in a staged hot-pressing manner, which greatly reduces the material internal stress of the 3D curved glass during the molding process, thereby greatly reducing the small cracks on the edge of the glass and significantly improving the quality of the glass. Yield of non-flat glass. In addition, both the upper mold and the lower mold are formed by mechanical processing using block graphite.

The molding equipment mainly includes the first hot-pressing module 110, the second hot-pressing module 120 and the third hot-pressing module 130 arranged in the form of an assembly line. In the direction of the arrow, it passes through the first hot-pressing module 110, the second hot-pressing module 120, and the third hot-pressing module 130 in sequence, and is used to heat-press a single piece of flat glass blank into a mobile terminal 3D curved glass product 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, the cylinder 111 is vertically arranged, the upper cooling plate 112, the upper heating plate Plate 113, lower heating plate 114 and lower cooling plate 115 are all placed in a closed and breathable molding chamber 400, upper cooling plate 112 is connected to the lower end of cylinder 111, and upper heating plate 113 is connected under the upper cooling plate 112 .

When the 3D curved surface forming mold is subjected to thermocompression molding, the bottom surface of the upper heating plate 113 is used to contact the top surface of the 3D curved surface forming mold, and the top surface of the lower heating plate 114 is used to contact with the top surface of the 3D curved surface forming mold. The bottom surfaces are in contact, and the lower heating plate 114 is connected to the lower cooling plate 115 ; the second hot-pressing die set 120 and the third hot-pressing die set 130 adopt the same part configuration as the first hot-pressing die set 110 .

The molding temperature of the first hot-pressing module 110, the second hot-pressing module 111 and the third hot-pressing module 112 is 950 degrees, and the output pressure is 0.001Mpa-0.8Mpa. The output pressure depends on the different requirements of the product Choose between 0.001Mpa-0.8Mpa.

Preferably, a double-sided grid plate 116 is arranged between the upper heating plate 113 and the upper cooling plate 112, and a double-sided grid plate 117 is arranged between the lower heating plate 114 and the lower cooling plate 115. The two sides of the double-sided grid plates 116 and 117 are respectively processed with grid grooves, which can slow down the temperature rise of the 3D curved surface forming mold after assembly.

In a preferred embodiment of the mobile terminal 3D curved glass molding method of the present invention, the molding equipment further includes: a first preheating module 210, a second preheating module 220, a third preheating module 220, and a third preheating module arranged in an assembly line. The thermal module 230 and the fourth preheating module 240, the first hot pressing module 110 is located after the fourth preheating module 240, and the 3D curved surface forming mold is successively Through the first preheating module 210 , the second preheating module 220 , the third preheating module 230 and the fourth preheating module 240 , the 3D curved surface molding mold is heated in stages by heat conduction.

Specifically, the first preheating module 210 includes an auxiliary cylinder 211, an auxiliary upper cooling plate 212, an auxiliary upper heating plate 213, an auxiliary lower heating plate 214, and an auxiliary lower cooling plate 215. The auxiliary cylinder 211 is vertically arranged, and the auxiliary The upper cooling plate 212, the auxiliary upper heating plate 213, the auxiliary lower heating plate 214 and the auxiliary lower cooling plate 215 are also placed in the molding chamber 400, the auxiliary upper cooling plate 212 is connected to the lower end of the auxiliary cylinder 211, and the auxiliary upper heating plate 213 is connected under the secondary upper cooling plate 212.

When the 3D curved surface forming mold was preheated, the bottom surface of the auxiliary upper heating plate 213 was used to contact the top surface of the 3D curved surface forming mold, and the top surface of the auxiliary lower heating plate 214 was used to contact the 3D curved surface forming mold. The bottom surface of the auxiliary heating plate 214 is connected to the auxiliary lower cooling plate 215; the second preheating module 220 and the third preheating module 230 use the same parts as the first preheating module 210 Configuration, the fourth preheating module 240 adopts the same parts configuration as the first hot pressing module 110 to slow down the temperature rise rate of the 3D curved surface forming mold, and the fourth preheating module 240 adopts the auxiliary cylinder 211 Replace the cylinder 111 to avoid applying excessive pressure to the 3D curved surface forming mold before the formal hot pressing.

The 3D curved surface forming mold and the flat glass blank need to be uniformly preheated before pressing, and the 3D curved surface forming mold and the flat glass blank can be controlled to protect and heat by maintaining pressure. The preheating temperature of the first preheating module 210 is 650 degrees, and the output pressure is 4-15 kg; the preheating temperature of the second preheating module 220 is 750 degrees, and the output pressure is 4-15 kg; the third The preheating temperature of the preheating module 230 is 850 degrees, and the output pressure is 4-15 kg; the preheating temperature of the fourth preheating module 240 is 950 degrees, and the output pressure is 4-20 kg; the preheating of the 3D curved surface forming mold The heat temperature is gradually preheated from low to high, which is beneficial to the slow heating of the 3D curved surface forming mold and the flat glass blank.

Preferably, the auxiliary upper heating plate 213 and the auxiliary upper cooling plate 212 are connected through a plurality of spacers 216, and the auxiliary lower heating plate 214 and the auxiliary lower cooling plate 215 are connected through a plurality of spacers 217. connection, the contact area of the spacers 216 and 217 is not as good as that of the double-sided grid plates 116 and 117. Compared with the double-sided grid plates 116 and 117 in the preheating stage, the spacers 216 and 217 can speed up the 3D curved surface forming mold temperature rise rate.

In a preferred embodiment of the mobile terminal 3D curved glass forming method of the present invention, the forming equipment further includes: a first cooling module 310, a second cooling module 320, and a third cooling module 330 arranged in an assembly line And the fourth cooling module 340, the first cooling module 310 is located after the third hot-pressing module 130, and the 3D curved surface forming mold passes through the first cooling after passing through the third hot-pressing module 130 The module 310 , the second cooling module 320 , the third cooling module 330 and the fourth cooling module 340 are used to cool the 3D curved surface forming mold in stages by means of heat conduction.

Preferably, the first cooling module 310 adopts the same parts configuration as the first hot-pressing module 110, so as to ensure a stable pressure-holding effect on the 3D curved surface forming mold at the initial stage of cooling, while the second cooling The module 320 adopts the same component configuration as the fourth preheating module 240 to speed up the cooling speed of the 3D curved surface forming mold.

When the 3D curved surface forming mold passes through the first cooling module 310, it is cooled by heat transfer with the upper cooling plate and the lower cooling plate in the first cooling module 310;

When the 3D curved surface forming mold passes through the second cooling module 320, it 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 molding die passes through the third cooling module 330 and the fourth cooling module 340, it passes through the liquid cooling plates arranged in the third cooling module 330 and the fourth cooling module 340 (the liquid cooling plate is selected to have a temperature reduction function). Effect of the liquid, the utility model is preferably tap water) for water cooling.

Specifically, a double-sided grid plate 116 is arranged between the upper heating plate 113 and the upper cooling plate 112 of the first cooling module 310, and a double-sided grid plate is arranged between the lower heating plate 114 and the lower cooling plate 115. 117, and a double-sided grid plate 216 is arranged between the auxiliary upper heating plate 213 and the auxiliary upper cooling plate 212 of the second cooling module 320, and a double-sided grid plate 216 is arranged between the auxiliary lower heating plate 214 and the auxiliary lower cooling plate 215. Face grid plate 217.

As shown in Figure 2, the process of processing curved glass by the molding equipment of the present invention is: placing a single flat glass blank in a 3D curved surface forming mold in advance, and then forming the 3D curved surface with the single flat glass blank The mold is placed on the feeding port platform 1, and after the 3D curved surface forming mold is sensed by the induction device, the cylinder controls the push rod to push the 3D curved surface forming mold into the forming chamber 400;

After the 3D curved surface molding mold is sent into the molding chamber 400, it passes through the first preheating module 210, the second preheating module 220, the third preheating module 230 and the fourth preheating module arranged in an assembly line in advance. The preheating module 240 heats the 3D curved surface forming mold in stages by means of heat conduction, and slowly preheats the single piece of flat glass blank;

After the preheating of the 3D curved surface forming mold is completed, the first hot-pressing module 110, the second hot-pressing module 120 and the third hot-pressing module 130 arranged in the form of an assembly line are sequentially passed through, and the pressure of the utility model is passed. The control device 5 controls the down-pressing pressure of the three hot-pressing modules, and is used to hot-press and form a single-piece flat glass blank into a 3D curved glass product in stages (that is, an arc surface has appeared around the single-piece flat glass blank);

After the 3D curved surface forming mold passes through the third hot pressing module 130, it passes through the first cooling module 310, the second cooling module 320, the third cooling module 330 and the The four-cooling module 340 cools the 3D curved surface forming mold in stages by means of heat conduction, and gradually reduces the temperature of the 3D curved surface forming mold. After the 3D curved surface forming mold is cooled four times, it passes through the liquid cooling channel 2 (auxiliary cooling device) After auxiliary cooling is performed on the formed 3D curved glass product, the product is discharged through the discharge port 3 .

As shown in Figure 3, the pressure control device 5 for forming curved glass for a mobile terminal of the utility model in Figure 3 includes: an assembly line arrangement for hot-pressing a single piece of flat glass blank into a 3D curved glass product in stages The first hot-pressing die set 110, the second hot-pressing die set 120 and the third hot-pressing die set 130;

The pressure control device 5 also includes: a first proportional valve 51 and a first solenoid valve 511 used to control the pressure of the first hot-pressing module 110 during the molding operation; The second proportional valve 52 and the second electromagnetic valve 521 for the pressure during the molding operation; the third proportional valve 53 and the third electromagnetic valve 531 for controlling the pressure of the third hot pressing module 130 for the molding operation.

The first proportional valve 51 for controlling pressure output is connected with the first solenoid valve 511 for converting and outputting the pressure. The pressure output by the valve 51 is applied to the cylinder in the first hot-pressing module 110 to control the upper heating plate to go up or down;

The connection control relationship between the second proportional valve 52, the second solenoid valve 521, the second hot-pressing module 120, the third proportional valve 53, the third solenoid valve 531, and the third hot-pressing module 130 is the same as that of the first The connection control relationship of the proportional valve 51 , the first electromagnetic valve 511 , and the first hot-pressing module 110 is the same.

The first solenoid valve 511, the second solenoid valve 521, and the third solenoid valve 531 all adopt electronic positive pressure control mode, and the control accuracy can reach 0.001Mpa.

At the same time, in the molding process, the molding chamber 400 is filled with nitrogen to prevent oxidation, and the molding cycle can be repeated under the condition that the temperature of the 3D curved surface molding mold is high, and the single flat glass blank is placed in the 3D curved surface molding mold ( In the state between the upper mold and the lower mold), a single flat glass blank is formed into a curved state by applying pressure in a high temperature environment (950 degrees).

There is a 3D curved surface forming mold under each station, and the processing time of all stations is the same, which can be displayed through the display console 4 (which can display the temperature, pressure, processing Time and other parameters) are adjusted and controlled, which is conducive to the simultaneous processing of flat glass blanks in multiple 3D curved surface forming molds, and improves processing efficiency.

It should be noted that in practical applications, according to actual needs and requirements of different products, the number of molding modules, preheating modules, and cooling modules may not be the number of the utility model. It is also possible to set only one pressing module at a time, and other pressing modules can be used as preheating modules or cooling modules, and the specific number is not limited.

To sum up, the utility model discloses a pressure control device for forming curved glass for a mobile terminal. The pressure control device includes: an assembly line for hot-pressing a single piece of flat glass blank into a 3D curved glass product in stages. Arranged first hot-pressing module, second hot-pressing module and third hot-pressing module; first proportional valve and first solenoid valve used to control the pressure of the first hot-pressing module for molding operation ; The second proportional valve and the second solenoid valve used to control the pressure when the second hot pressing module performs the molding operation; the third proportional valve and the third proportional valve used to control the pressure when the third hot pressing module performs the molding operation third solenoid valve. The utility model controls the pressing pressure of the hot pressing module on the 3D curved surface forming mold in proportion through the proportional valve and the electromagnetic valve, which reduces the internal stress of the material in the forming process of the 3D curved surface glass, reduces the generation of small cracks, and improves the Yield rate of curved glass.

It should be understood that the application of the present utility model is not limited to the above examples, and those skilled in the art can improve or change according to the above description, and all these improvements and changes should belong to the protection of the appended claims of the present utility model scope.

Claims (6)

1. A pressure control device for forming a mobile terminal curved glass, characterized in that it includes: a first hot pressing mold arranged in an assembly line for hot pressing a single piece of flat glass blank into a 3D curved glass product in stages group, the second hot pressing module and the third hot pressing module; The pressure control device further includes: a first proportional valve and a first solenoid valve for controlling the pressure of the first hot-pressing module during the molding operation; A second proportional valve and a second solenoid valve used to control the pressure of the second hot-pressing module during the molding operation; The third proportional valve and the third electromagnetic valve are used to control the pressure of the third hot-pressing module when performing the molding operation. 2. The pressure control device for forming curved glass for mobile terminals according to claim 1, wherein the output pressures of the first hot-pressing module, the second hot-pressing module and the third hot-pressing module are all 0.001 Mpa-0.8Mpa. 3. The pressure control device for forming curved glass for mobile terminals according to claim 1, wherein the monolithic flat glass blank is placed in a 3D curved surface forming mold; the 3D curved surface forming mold includes an upper mold and a lower mold The side of the lower mold facing the upper mold is provided with a concave cavity, and the side of the upper mold facing the lower mold is provided with a boss. A single piece of flat glass blank is hot-pressed into 3D curved glass, and a closed hollow cavity is symmetrically arranged in the middle of the bottom surface of the lower mold. Both the upper mold and the lower mold are machined and formed by block graphite. 4. The pressure control device for forming curved glass for a mobile terminal according to claim 3, wherein the first hot pressing module includes a cylinder, an upper cooling plate, an upper heating plate, a lower heating plate and a lower cooling plate; The cylinder is arranged vertically, the upper cooling plate, the upper heating plate, the lower heating plate and the lower cooling plate are all placed in a closed and breathable molding chamber, the upper cooling plate is connected to the lower end of the cylinder, and the upper heating plate is connected to the upper under the cooling plate; The bottom surface of the upper heating plate is used to contact the top surface of the 3D curved surface forming mold, the top surface of the lower heating plate is used to contact the bottom surface of the 3D curved surface forming mold, and the lower heating plate is connected on the lower cooling plate; Both the pressing die group and the third hot pressing die group adopt the same parts configuration as the first hot pressing die group. 5. The pressure control device for mobile terminal curved glass forming according to claim 4, characterized in that the first proportional valve used to control the pressure output is connected to the first solenoid valve used to convert the pressure output, said The first solenoid valve is connected to the first hot-pressing module, and is used to add the pressure output by the first proportional valve to the cylinder in the first hot-pressing module to control the upper heating plate to rise or press down; The connection control relationship between the second proportional valve, the second solenoid valve, the second hot-pressing module and the third proportional valve, the third solenoid valve, and the third hot-pressing module is the same as that of the first proportional valve, the first electromagnetic The connection control relationship of the valve and the first hot-pressing module is the same. 6 . The pressure control device for mobile terminal curved glass forming according to claim 5 , wherein the first solenoid valve, the second solenoid valve and the third solenoid valve all adopt an electronic positive pressure control method.