CN107382041A - A mobile terminal 3D protective glass cover thermocompression forming device - Google Patents

Abstract

The invention relates to a hot press molding device for a 3D protective glass cover of a mobile terminal, in particular to a hot press molding device for a 3D protective glass cover of a smart phone, which can reduce the cost of a mold when manufacturing a plurality of glass protective glass covers with curved surfaces on the sides and easily mold the curved surfaces with various radiuses on the sides, and the hot press molding device for the 3D protective glass cover of the mobile terminal can improve the temperature control precision and the temperature regulation responsiveness, and reduce the temperature gradient and the cost of the mold when manufacturing the glass protective glass covers with curved surfaces on the sides; since the separate mold is provided to press-mold only the molding portion of the cover glass and to press-mold only the molding portion of the plate glass, not only the hot press molding time is shortened, but also the entire mold cost is reduced because the mold material of the portion contacting the glass is made of a high-grade material, and the separate structure can easily manufacture molds corresponding to various shapes of molding works.

Description

A mobile terminal 3D protective glass cover thermocompression forming device

technical field

The invention relates to a mobile terminal 3D protective glass cover thermoforming device, especially a device that can reduce mold costs and easily form several sides with various radii when making a glass cover glass cover with curved surfaces on several sides The curved surface of the smart phone 3D protective glass cover thermocompression molding device.

Background technique

At present, mobile terminals such as smartphones and tablet computers, especially smartphones, are gradually abandoning resin covers for protective covers made of glass, which improves the firmness and aesthetics and improves product quality.

Although flat glass can be made into the required thickness by extrusion method and mass-produced with calender rolls, the glass cover glass with curved surfaces on several sides, such as two or four sides, puts the base material into the lower mold and The upper mold constitutes the internal post-molding of the mold body.

In the prior art, nitrogen is usually used as the protective gas during the molding process of the cover glass. However, nitrogen has a low thermal conductivity, which easily leads to large temperature gradients, poor temperature control accuracy and temperature control response, which affects product yield, thereby increasing production costs and reducing product quality. In addition, in the prior art, when the radius of the curved portion of the cover glass changes, the mold must be remade, so changing the appearance design requires a very high mold cost, thereby greatly increasing the production cost of the product.

Contents of the invention

The purpose of the present invention is to provide a mobile terminal 3D protective glass cover thermoforming device for the deficiencies of the prior art, which can improve the temperature control accuracy and temperature control response when making a number of glass cover glass covers with curved sides. performance, reduce temperature gradient and mold cost, and easily mold various radius curved surfaces, and, since a separate mold is provided that is pressurized and molded only for the molded part of the cover glass, only the molded part of the flat glass is pressure molded , not only shortens the shape molding time, but also reduces the overall mold cost because the metal material of the part contacting the glass is set to a high-grade material, and its separate structure can easily produce molds corresponding to various shapes of molding operations.

In order to achieve the above object, a mobile terminal 3D protective glass cover thermocompression molding device of the present invention sequentially transfers the mold inside the chamber, and the mold passes through the auxiliary preheating chamber, the first preheating part, the second preheating part, and the second The second preheating section, the third preheating section, the forming section, the first cooling section, the second cooling section, and the auxiliary cooling room, and then carry out staged heating, hot pressing forming, and staged cooling in the order of preheating, forming, and cooling ; The cavity is filled with an inert protective gas whose thermal conductivity is higher than that of pure nitrogen; the mold includes a lower mold, an upper mold, and flat glass made of tempered glass, as well as a forming part, a supporting part, and a guide for guiding and positioning the upper mold. parts, wherein the flat glass is located between the lower mold and the upper mold, and the forming part is fixedly connected to the upper mold; the first preheating part, the second preheating part, the third preheating part, the forming part and the first cooling part , The second cooling part installs a plurality of lower heating plates~lower heating plates for placing molds on the bottom surface inside the chamber, and installs upper heating plates~upper heating plates that are driven up and down by a plurality of actuators~actuators Corresponding to the lower heating plate ~ the lower heating plate is installed.

Preferably, the inert protective gas with higher thermal conductivity than pure nitrogen is a mixed gas obtained by mixing nitrogen and helium in a certain proportion.

Preferably, in the mixed gas composed of nitrogen and helium, the mass ratio of nitrogen and helium is in the range of 5 to 1000.

Preferably, in the mixed gas composed of nitrogen and helium, the mass ratio of nitrogen and helium is in the range of 70 to 100.

Preferably, the molding part is detachable from the upper mold.

As preferably, the second upper mold is composed of an upper template and an upper mold forming part, the upper mold forming part is combined with the bottom surface contour of the upper template, and the bottom part is formed with an upper molding surface for molding the end part of the flat glass The guide is installed between the second upper mold and the second lower mold and guides the forming part of the upper mold to move up and down; the second lower mold is composed of the lower template and the supporting part, and the supporting part is protruding upwards and connected with bolts On the upper profile of the lower template, the upper surface is formed with a lower molding surface corresponding to the upper molding surface.

In order to prevent deformation of the middle part of the flat glass during molding, it also includes: an upper middle support frame protruding downward from the middle part of the upper template to support the upper part of the middle part of the flat glass during molding; a lower middle support frame on the lower template The middle part of the glass is protrudingly formed upward to support the lower part of the middle part of the flat glass during molding.

Preferably, a mold is further included, and the mold includes: a first upper mold, and a pressurizing portion is protrudingly formed on the bottom surface of the upper mold body, and the pressing portion has a surface contact with the plate glass as the molding object to be molded. The horizontal plane, the contour formed on the horizontal plane in a streamlined or desired shape inclined downwards, 1 to 4 molding surfaces are formed on the horizontal plane contour; the first lower mold is used to place the flat glass, and the lower mold The lower mold body is composed of a supporting surface corresponding to the horizontal surface and the molding surface of the pressing part.

As preferably, form the pressing portion of the first upper die separately from the upper die body, and form a clamping groove for the pressing portion to be clamped into the upper die body so that the pressing portion can be combined with the upper die in a detachable manner. Body; the supporting surface of the first lower mold is formed separately from the lower mold body, and an engaging groove for the supporting surface to be clamped into the lower mold body is formed on the lower mold body so that the supporting surface can be combined with the lower mold body in a detachable manner.

Beneficial effects of the present invention: The mobile terminal 3D protective glass cover thermocompression molding device provided by the present invention can properly reduce the auxiliary preheating chamber, the first preheating part, the second preheating part, and the third preheating part during the molding process. , the forming part, the first cooling part, the second cooling part, the auxiliary cooling room and other different temperature gradients, to a certain extent avoid the problem of product yield drop caused by sharp temperature changes, and at the same time, it can also be improved to a certain extent The temperature control accuracy and accuracy of key core areas in different areas such as the auxiliary preheating chamber, the first preheating part, the second preheating part, the third preheating part, the forming part, the first cooling part, the second cooling part, and the auxiliary cooling chamber Responsiveness of temperature control is beneficial to improve the quality and yield of hot pressing molding.

Moreover, the present invention provides a separate mold that pressurizes only the forming portion of the cover glass and pressurizes only the forming portion of the flat glass, which not only shortens the shape forming time, but also because the metal material of the part contacting the glass It is set to a high-grade material to reduce the overall mold cost, and its separate structure can easily produce molds corresponding to various shapes of molding operations, and even if the mold is used for protective glass cover molding, the defective rate can be reduced. Moreover, using The curved surface forming frame with curved surface performs side pressure, rolling pressure, partial heating of the recurved part, pressurized air blowing and other treatments for the material, so that the protective glass covers with curved surfaces on several sides can be precisely formed very easily.

Description of drawings

Fig. 1 is a schematic front view of the first embodiment of the molding device of the present invention.

Fig. 2 is a schematic top view of the first embodiment of the molding device of the present invention.

Fig. 3 is a diagram of the forming process of the protective glass cover of the first embodiment of the forming device of the present invention.

Figures 4a and 4b are illustrations of protective glass covers.

Fig. 5 is an exploded oblique view of the first embodiment of the mold of the present invention.

6a and 6b are cross-sectional views of the first embodiment of the mold in use according to the present invention.

Figures 7a and 7b are illustrations of the deformed implementation state of the first embodiment of the mold of the present invention.

Fig. 8 is an exploded oblique view of the second embodiment of the mold of the present invention.

9a and 9b are cross-sectional views of the second embodiment of the mold in use according to the present invention.

Fig. 10 is an illustration of the deformation implementation state of the second embodiment of the mold of the present invention.

Fig. 11 is a diagram of a second embodiment of the molding device of the present invention.

Fig. 12 is a diagram of a third embodiment of the molding device of the present invention.

Fig. 13 is a diagram of a fourth embodiment of the molding device of the present invention.

Fig. 14 is a diagram of a fifth embodiment of the molding device of the present invention.

Fig. 15 is an implementation state diagram of the fifth embodiment of the molding device of the present invention.

Fig. 16 is an implementation state view of the fifth embodiment of the molding device of the present invention.

Reference signs include:

1: Chamber 2: Auxiliary preheating chamber

3: The first preheating section 4: The second preheating section

5: The third preheating section 6: Forming section

7: The first cooling section 8: The second cooling section

9: Auxiliary Cooling Chamber 10: Actuator

11: Lower heating plate 12: Upper heating plate

50: Curved surface forming frame 51: Curved surface

52: Material 53: Internal heater

54: Multiple holes 55: Suction passage

56: Vacuum chamber 60: Fixed part

61: Actuator 62: Fixed rod

70: Pressure part 80: Rolling pressure part

81: Actuator 82: Pressure roller

90: heating element 91: heating lamp

92: Reflector 100: Pressurized blower

101: Actuator 102: Pressurized frame

200: mold 202: protective glass cover

203: Bolt 210: First Upper Die

211: Upper die body 212: Pressurizing part

213: Horizontal plane 214: Forming plane

220: The first lower die 221: Lower die body

222: Support surface 230: Second upper mold

231: upper mold plate 232: upper mold forming part

233: upper forming surface 234: upper middle support frame

250: Second lower die 251: Lower template

252: Support part 253: Lower molding surface

254: the lower middle support frame.

detailed description

A preferred embodiment of the molding device of the present invention will be described in detail below with reference to FIGS. 1 to 16 .

The molding device of the present invention is divided into the first to fifth embodiments according to its implementation forms, so the description will be given below with each embodiment.

first embodiment

As shown in Figures 1 to 10, the mold 200 is sequentially transferred inside the chamber 1 with certain sealing ability and thermal insulation ability, and the mold passes through the auxiliary preheating chamber 2 and the first preheating part 3 sequentially through the conveying mechanism , the second preheating section 4, the third preheating section 5, the molding section 6, the first cooling section 7, the second cooling section 8, and the auxiliary cooling chamber 9, and then carry out staged heating in the order of preheating, molding, and cooling , thermoforming and cooling in stages.

The chamber 1 is filled with an inert protective gas whose thermal conductivity is higher than that of pure nitrogen.

The inert protective gas is a mixed protective gas obtained by mixing nitrogen (N2) and helium (He) in a certain proportion.

The mold 200 includes a lower mold, an upper mold, and a flat glass 201 made of tempered glass, as well as a forming part, a supporting part, and a guide for guiding and positioning the upper mold, wherein the flat glass 201 is located between the lower mold and the upper mold , the molding part is fixedly connected with the upper mold, and the molding part and the upper mold can be separated.

The first preheating part 3 , the second preheating part 4 , the third preheating part 5 , the molding part 6 , the first cooling part 7 , and the second cooling part 8 place the plurality of lower heating plates 11 a of the mold 200 ~The lower heating plate 11f is installed on the inner bottom surface of the chamber 1, and the upper heating plate 12a~upper heating plate 12f, which are driven by a plurality of actuators 10a~actuator 10f and move up and down, correspond to the lower heating plate 11a~ The lower heating plate 11f is installed.

The actuators 10a to 10f are operated by hydraulic cylinders or servo motors.

The inside of the chamber 1 maintains a temperature of about 300° C., and a mixed protective gas obtained by mixing nitrogen (N2) and helium (He) in a certain proportion is continuously injected into the chamber 1 .

In the mixed protective gas obtained by mixing nitrogen and helium, the mass ratio of nitrogen and helium ranges from 5 to 1000 in consideration of gas cost factors and thermal conductivity change factors after mixing. Preferably, the mass ratio of nitrogen to helium ranges from 70 to 100. Further preferably, the mass ratio of nitrogen to helium ranges from 85 to 90.

Through the above optimization, the cost of the mixed protective gas composed of nitrogen and helium hardly increases, but the thermal conductivity is appropriately improved. In this way, this mixed protective gas can properly reduce the auxiliary preheating chamber 2 and the first preheating part. 3. The temperature gradient between different areas such as the second preheating part 4, the third preheating part 5, the forming part 6, the first cooling part 7, the second cooling part 8, and the auxiliary cooling chamber 9, to a certain extent avoids the temperature gradient The problem of product yield decline caused by rapid changes. At the same time, due to the slight increase in the thermal conductivity of the shielding gas, the heat exchange time between the temperature feedback sensor, the heater heating part, and the key core working parts will be appropriately shortened. Auxiliary preheating chamber 2, first preheating part 3, second preheating part 4, third preheating part 5, molding part 6, first cooling part 7, second cooling part 8, auxiliary cooling chamber 9 The temperature control accuracy and temperature regulation responsiveness of the key core working parts in different areas, etc., will help to further improve the quality and yield of hot pressing.

After the mold 200 thrown into the chamber 1 is put into the auxiliary preheating chamber 2, it is sequentially transferred to the auxiliary preheating chamber 2→first preheating part 3→second preheating part 4→third preheating part 4→third Preheating section 5→forming section 6→first cooling section 7→second cooling section 8→auxiliary cooling chamber 9, in this process, the flat glass 201 as the base material is heated and shaped into a desired shape, that is, The protective glass cover 202 formed into a plurality of sides with curved parts is taken out by a discharge robot.

The auxiliary preheating chamber 2 preheats the mold 200 to a temperature of about 300°C, the first preheating part 3 preheats to a temperature of about 400°C, and the second preheating part 4 preheats to a temperature of about 500-550°C. The third preheating part 5 is preheated to a temperature of about 600-650°C, and the forming part 6 heats the mold 200 to a forming temperature of about 700-800°C and applies a predetermined pressure to form the flat glass 201 into the desired shape. shape.

The first cooling section 7 and the second cooling section 8 slowly cool the mold 200 that has passed through the forming section 6, and the auxiliary cooling chamber 9 allows the mold 200 to cool naturally, and the mold 200 is slowly cooled from 300°C to A temperature of about 50°C.

The temperature of the mold 200 finally taken out by the discharge robot is about 70 to 80 degrees or less.

The actuator 10 can be operated by means of a hydraulic cylinder or a servo motor. Although the hydraulic cylinder is difficult to precisely control, it is suitable for mass production of products, and the servo motor can realize precise control.

Fig. 3 is an illustration of the state in which several sides of the cover glass, especially one or both sides, are formed into curved parts according to the first embodiment of the present invention. The mold 200 is formed into a protective glass cover 202 having a curved surface after a heating step, a molding step, and a cooling step. In the heating step, the temperature applied to the flat glass 201 rises slowly, and then in the molding step, the flat glass 201 maintains the molding temperature. The flat glass 201 is allowed to cool after the shaping step.

Fig. 4 to Fig. 7 is the first embodiment figure of mold 200 of the present invention, and it comprises:

In the first upper mold 210, a pressing portion 212 is protrudingly formed on the bottom surface of the upper mold body 211. The pressing portion 212 has a horizontal surface 213 that is molded while making surface contact with the flat glass 201 to be molded. The outer profile of 213 forms the molding surface 214 inclined downwards in a streamlined or desired shape, and 1 to 4 molding surfaces 214 are formed on the outer profile of the horizontal plane 213;

The first lower mold 220 , on which the flat glass 201 is placed, is composed of a lower mold body 221 having a supporting surface 222 corresponding to the horizontal surface 213 and the molding surface 214 of the pressing part 212 .

The mold 200 of the first embodiment is composed of a first upper mold 210 and a first lower mold 220 .

The first upper mold 210 presses the upper part of the plate glass 201 under a high temperature environment to shape the end of the plate glass 201 .

The first upper mold 210 includes an upper mold body 211 formed in a rectangular shape, and a pressurizing portion 212 that pressurizes the plate glass 201 is formed protruding downward from the bottom of the upper mold body 211 .

The bottom surface of the pressurizing part 212 is formed with a horizontal surface 213 and a forming surface 214 that are directly in surface contact with the plate glass 201 and pressurized. formed.

Moreover, the molding surface 214 which contacts both ends of the plate glass 201 and molds a shape is formed in the both ends part of the horizontal plane 213 so that it may incline downward.

The number of forming surfaces 214 is such that one to four forming surfaces 214 can be formed when the outline of the horizontal surface 213 has four sides.

That is, the molding surface 214 can only be formed on one side of the horizontal plane 213, or can be formed on both sides of the horizontal plane 213 as shown in the figure, or can be formed on three sides of the horizontal plane 213. All sides of the horizontal plane 213 form four profiled planes 214 .

In addition, the first lower mold 220 houses the plate glass 201 during molding and has a rectangular lower mold body 221. The upper surface of the lower mold body 221 is formed with a groove for inserting the pressing part 212 of the first upper mold 210. A support surface 222 is formed at the bottom of the groove, and the support surface 222 is formed into a curved surface corresponding to the horizontal surface 213 and the molding surface 214 of the pressing part 212 .

That is, the middle part of the supporting surface 222 is formed horizontally and both ends are formed inclined downward.

When utilizing the first upper mold 210 and the first lower mold 220 formed in this way to form the flat glass 201, the flat glass 201 is placed on the supporting surface 222 of the first lower mold 220 as shown in FIG. The cover glass 202 in which both ends of the plate glass 201 are molded by the molding surface 214 of the pressurizing part 212 and molded can be easily manufactured by descending and pressurizing in a high-temperature environment.

In addition, Figures 7a and 7b illustrate the deformation implementation state of the mold of the first embodiment,

The pressing part 212 of the first upper die 210 is formed separately from the upper die body 211, and the clamping groove 211a that allows the pressing part 212 to be clamped and combined is formed on the upper die body 211 so that the pressing part 212 can be disassembled. Combined with the upper mold body 211;

The supporting surface 222 of the first lower mold 220 is formed separately from the lower mold body 221, and the supporting surface 222 is formed on the lower mold body 221 to allow the supporting surface 222 to be clamped into the engaging groove 221a for combination so that the supporting surface 222 can be detachably combined with the lower mold body. 221.

That is, the modified implementation state of the first embodiment constitutes the pressing portion 212 of the first upper mold 210 and the support surface 222 of the first lower mold 220 in a separate manner.

When configured in a separate manner as described above, the pressing part 212 and the support surface 222 that are actually in surface contact with the flat glass 201 and are molded are made of expensive high-grade materials such as cemented carbide and graphite (Graphite), and the mold can be reduced. Cost of production.

That is, when the upper mold body 211 and the pressurizing part 212 are integrally formed, and the lower mold body 221 and the support surface 222 are integrally formed like the mold of the first embodiment, all mold constituent elements need to use expensive high-grade material, so the mold manufacturing cost will be relatively high, but when it is formed in a separate manner as shown in Figures 7a and 7b, only the pressurizing part 212 and the support surface 222 are made of expensive high-grade materials, while the rest of the constituent elements can be It is made of cheap metal materials, thereby reducing the cost of mold production.

The mold of the first embodiment described above achieves molding in a state where the pressurizing part 212 and the support surface 222 are directly in contact with one side of the plate glass 201, so the molding quality can be improved.

In addition, FIGS. 8 to 10 illustrate the second embodiment of the mold 200 of the present invention, which includes: a second upper mold 230, consisting of an upper mold 231 and an upper mold forming part 232, and the upper mold forming part 232 is combined with a bolt 203 On the bottom surface profile of the upper template 231, the bottom surface is formed with an upper molding surface 233 that molds the end portion of the flat glass 201; the guide 240 is formed into a square frame shape, and is installed on the second upper mold 230 and the second upper mold 230. Between the lower molds 250 and guide the upper mold forming part 232 to move up and down; the second lower mold 250 is composed of a lower template 251 and a supporting part 252, and the supporting part 252 protrudes upwards and is combined with bolts 203 outside the upper part of the lower template 251. The upper surface is formed with a lower molding surface 253 corresponding to the upper molding surface 233 .

The mold of the second embodiment of the present invention constitutes a mold in a separate manner, and is mainly composed of a second upper mold 230 , a guide 240 , and a second lower mold 250 .

The second upper mold 230 has a rectangular upper mold 231 on which a plurality of bolt holes are formed.

On both sides of the bottom surface of the upper template 231, an upper mold forming part 232 that only pressurizes the forming part of the flat glass 201 is combined with bolts, and an upper mold forming part 232 that pressurizes the flat glass 201 is formed on the bottom surface of the upper mold forming part 232. The molding surface 233 .

Various methods such as bolts, pins, and bonding can be used to bond the upper die forming portion 232 to the upper die plate 231 .

The guide 240 has a rectangular frame shape, is disposed on the upper surface of the second lower mold 250 and guides the second upper mold 230 to move up and down.

Moreover, the shape of the guide 240 is not limited to a rectangular shape, and may be deformed into various shapes according to the shapes of the second upper mold 230 and the second lower mold 250 .

In addition, the second lower mold 250 includes a rectangular lower die 251 , and the supporting portion 252 protrudes upward corresponding to the upper die forming portion 232 and is coupled to the upper surface of the lower die 251 .

A lower molding surface 253 corresponding to the upper molding surface 233 is formed on the upper surface of the support portion 252 , and the flat glass 201 is formed between the upper molding surface 233 and the lower molding surface 253 .

The shapes of the second upper mold 230 and the second lower mold 250 are not limited to rectangular shapes, and various shapes can be formed.

The molding operation performed by utilizing the second embodiment thus constituted is as shown in FIG. 9a. The flat glass 201 is placed on the support portion 252 of the second lower mold 250, and the second upper mold 230 is driven down under a high temperature environment, and the upper mold is formed. The upper forming surface 233 of the portion 232 slowly presses the forming part of the flat glass 201 to form the forming part of the flat glass into a curved shape or a desired shape as shown in FIG.

In addition, FIG. 10 illustrates the deformation implementation state of the mold 200 of the second embodiment,

In order to prevent deformation of the middle part of the flat glass 201 during molding, it also includes:

The upper intermediate support frame 234 is formed to protrude downward at the middle part of the upper template 231 to support the upper middle part of the flat glass 201 during molding; the lower intermediate support frame 254 is formed to protrude upward at the middle part of the lower template 251 to The lower part of the middle part of the flat glass 201 is supported during molding.

That is, as shown in FIG. 10 , an upper middle support frame 234 protrudes downward at the middle part of the upper template 231, and a lower middle support frame 254 is formed protruding upward at the middle part of the lower template 251, so that the upper middle support frame 254 is formed when molding. The supporting frame 234 and the lower intermediate supporting frame 254 provide support to the middle portion of the formed flat glass 201 to prevent the middle portion of the flat glass 201 from being deformed during molding.

Moreover, preferably, the intermediate support frame 234 and the intermediate support frame 254 are made of heat insulating materials that do not conduct heat to the flat glass 201 during molding.

The mold of the second embodiment of the present invention constituted in this way is formed separately to form the constituent elements of the mold, so when the shape of the cover glass 202 needs to be changed, the cover glass 202 of various shapes can be manufactured by simply replacing the necessary part. Forming mold.

second embodiment

Figure 11 illustrates a second embodiment of the invention comprising:

Curved surface molding frame 50 is equipped with curved surface 51 at one or both ends, and the plate-shaped material 52 in the preheated state is placed on the upper surface; fixed part 60 is driven by actuator 61 to move up and down and has the ability to hold the material when forming. 52 is fixed at one end of the fixed rod 62; the pressing part 70 has a pressing piece 72, which is driven by the actuator 71 to move up and down and exerts a biased load on one side of the material 52 during molding, so that the material 52 and the curved surface Part 51 is in close contact to realize curved surface molding.

The second embodiment constituted in this way does not use a mold body composed of upper and lower molds, but utilizes a curved surface forming frame 50 with an open top to bend and shape the curved surface of the cover glass.

The fixing part 60 and the pressurizing part 70 as constituent elements are installed inside a sealed chamber not shown in the figure, and the plate shape in the preheated state is placed on the upper surface of the curved surface forming frame 50 put into the chamber. Material 52.

During the molding operation, the fixed rod 62 constituting the fixed part 60 is driven down by the actuator 61 and fixes one end of the material 52, and the pressing piece 72 constituting the pressurizing part 70 is driven by the actuator 71. Descend and apply force to the end of the material 52 .

Accordingly, the material 52 in the preheated state is lowered by the pressing force of the pressing piece 72 and comes into close contact with the curved surface 51 of the curved surface forming frame 50, so that the curved surface of the cover glass is curved and formed.

third embodiment

Figure 12 illustrates a third embodiment of the invention comprising:

Curved surface molding frame 50 is equipped with curved surface 51 at one or both ends, and the plate-shaped material 52 in the preheated state is placed on the upper surface; fixed part 60 is driven by actuator 61 to move up and down and has the ability to hold the material when forming. One end of 52 is fixed to the fixed rod 62; Rolling pressing part 80 is provided with pressing roller 82, and it is moved up and down by the actuator 81 that moves along guide piece in the horizontal direction, with close contact material 52 surface during molding The rolling movement of the state makes the material 52 closely contact with the curved surface 51 to realize the forming of the curved surface.

The fixing part 60 and the rolling pressing part 80 of the third embodiment are also installed inside the sealed chamber not shown in the figure, and the plate shape in the preheating state is placed on the upper surface of the curved surface forming frame 50 inside the chamber. Material 52.

During the forming action, the fixed rod 62 of the fixed part 60 is driven by the actuator 61 to descend and fix one end of the material 52 placed on the upper surface of the curved surface forming frame 50, and the actuator 81 constituting the rolling pressing part 80 moves along The guide moves to the left and right to lower the pressure roller 82 , so that the material 52 placed on the curved surface forming frame 50 is in close contact with the curved surface 51 and then bent and formed to form a protective glass cover with a curved surface.

The actuator 81 is driven by an unillustrated power source to move in the left-right direction along the guide.

The curved surface forming frame 50 itself may be provided with heating means, by means of which the material 52 is directly heated to the forming temperature.

Fourth embodiment

Figure 13 illustrates a fourth embodiment of the invention comprising:

The curved surface forming frame 50 has a curved surface 51 at one or both ends, and the plate-shaped material 52 in a preheated state is placed on the upper surface;

The heating member 90 installs a heating lamp 91 emitting light at a high temperature on the periphery of the curved surface 51, and a reflector 92 is installed outside the heating lamp 91. The reflector 92 concentrates the light emitted by the heating lamp 91 onto the surface of the material 52. The curved portion is bent so that several sides of the material 52, especially one side or both sides, realize the shaping of the curved portion.

Moreover, one side of the curved surface forming frame 50 is provided with a suction passage 55 connected to a vacuum suction device, and a vacuum chamber 56 communicated with the suction passage 55 is formed inside the curved surface forming frame 50, and the curved surface 51 is connected with the vacuum The chamber 56 communicates with the multi-hole 54 so that the material 52 can be brought into close contact with the curved surface 51 by the suction force passing through the multi-hole 54 to achieve bending.

Furthermore, an internal heater 53 is installed inside the curved surface forming frame 50 to heat the curved surface portion 51 at a higher temperature than other parts.

In the fourth embodiment of the present invention, the heating member 90 is used to centrally heat the inflection point of the material 52 to achieve bending by its own weight.

The heating member 90 configured in this way is installed inside a sealed chamber not shown.

After the molding action starts, the internal heater 53 of the curved surface molding frame 50 installed inside the chamber runs and heats the curved surface 51 intensively, and the heating lamp 91 constituting the heating member 90 is turned on, and the light emitted by the heating lamp 91 is emitted. Mirror 92 reflects and concentrates the light on the inflection point portion of material 52 .

Accordingly, the toughness of the inflection point portion of the material 52 becomes the weakest.

At this time, when vacuum pressure is applied to the suction passage 55, a vacuum pressure is applied to the multi-holes 54 formed in the curved surface 51, and the material 52 is brought into close contact with the curved surface 51 of the curved surface forming frame 50 by the vacuum pressure to realize the curved surface. of the bend.

fifth embodiment

Figure 14 illustrates a fifth embodiment of the invention comprising:

The curved surface forming frame 50 has a curved surface 51 at one or both ends, and the plate-shaped material 52 in a preheated state is placed on the upper surface;

The fixing part 60 is driven by the actuator 61 to move up and down and has a fixing rod 62 that fixes one end of the material 52 during molding;

The pressure blowing part 100 is installed in a manner that the pressure frame 102 formed corresponding to the form of the curved surface forming frame 50 can move up and down by the drive of the actuator 71. The hollow chamber 103 connected to the supply pipe 104 for supplying nitrogen (N2) has a plurality of discharge holes 105 that can discharge nitrogen (N2) to the curved portion of the material 52 at the bottom of the pressurizing frame 102 .

Moreover, one side of the curved surface forming frame 50 is provided with a suction passage 55 connected to a vacuum suction device, and a vacuum chamber 56 communicated with the suction passage 55 is formed inside the curved surface forming frame 50, and the curved surface 51 is connected with the vacuum The chamber 56 communicates with the multi-hole 54 so that the material 52 can be brought into close contact with the curved surface 51 by the suction force passing through the multi-hole 54 to achieve bending.

In the fifth embodiment thus constituted, the material 52 is bent and formed using the discharge pressure of the nitrogen gas discharged from the pressurized blowing unit 100 .

After starting the molding action, the fixed rod 62 constituting the fixed part 60 is driven down by the actuator 61 and fixes one end of the material 52. In this state, the actuator 101 of the pressurized blowing part 100 drives the pressure Frame 102 descends.

When the pressurized frame 102 descends, the nitrogen gas supplied through the supply pipe 104 is discharged toward the curved surface 51 through the hollow chamber 103 and the discharge hole 105, and the nitrogen gas makes the end of the material 52 bend and be in close contact with the curved surface 51, thereby realizing bending.

At this time, a vacuum pressure is introduced into the inner vacuum chamber 56 of the curved surface forming frame 50 to apply a vacuum pressure through the multi-hole 54, so that the curved part of the material 52 is completely in close contact with the curved surface 51 without cracking. ) to achieve surface shaping.

Preferably, the multi-holes 54 and the discharge holes 105 are shaped into tiny sizes.

In addition, FIG. 15 illustrates an embodiment in which the fifth embodiment is put into the actual production process. A plurality of molding chambers 300 having the fixing portion 60 and the pressurized blowing portion 100 are arranged side by side, and in front of the molding chamber 300 The input/extraction robot 111 is installed, and the input/extraction robot 111 moves left and right along the guide 110 and inserts or extracts the curved surface forming frame 50 .

The curved surface forming frames 50 put into the forming chambers 300 are heated to the forming temperature in the respective forming chambers 300 to be bent.

Moreover, Figure 16 illustrates the fifth embodiment being installed in other embodiments of the production process,

A preheating chamber 120 capable of preheating the curved surface molding frame 50 on which the material 52 is placed is formed in each of the plurality of molding chambers 300 having the fixing portion 60 and the pressurized blowing portion 100, and the molding chambers 300 are arranged side by side. Arranged in a row, the inlet side of the molding chamber 300 is installed with a robot 112 that moves left and right along the guide 110 and puts the curved surface molding frame 50 into the inside of the molding chamber 300. The take-out robot 113 moves the member 110 to the left and right and takes out the curved surface forming frame 50 on which the curved surface is formed.

This other embodiment can further shorten the molding time of the cover glass due to the pre-heating chamber 120 is also formed, and the input robot 112 and the take-out robot 113 are installed separately on the inlet and outlet sides of the chamber 300, so the input and output of materials can be further improved. Take out the accuracy of the action.

The second to fifth embodiments applicable to the present invention use the curved surface forming frame 50 with an open upper part to bend several sides of the cover glass, especially one or both sides, into curved surfaces.

This embodiment does not use a mold body composed of an upper mold and a lower mold, so that the cost of the mold can be greatly reduced, and when the radius of the curved surface of the product is changed, the product can be produced quickly after measures are taken.

It should be noted that the above description is not a limitation of the present invention, and any obvious replacements are within the protection scope of the present invention without departing from the inventive concept of the present invention.

Claims (9)

1. A mobile terminal 3D protective glass cover thermocompression molding device, characterized in that the mold (200) is sequentially transferred inside the chamber (1), and the mold (200) passes through the auxiliary preheating chamber (2) sequentially through the transmission mechanism ), the first preheating part (3), the second preheating part (4), the third preheating part (5), the molding part (6), the first cooling part (7), the second cooling part (8) , an auxiliary cooling chamber (9), and then perform staged heating, hot press forming and staged cooling according to the sequence of preheating, forming, and cooling; The chamber (1) is filled with an inert protective gas whose thermal conductivity is higher than that of pure nitrogen; The mold (200) includes a lower mold, an upper mold, and plate glass (201) made of strengthened glass, as well as a forming part, a supporting part, and guides for guiding and positioning the upper mold, wherein the plate glass (201) is located at the bottom Between the mold and the upper mold, the forming part is connected with the upper mold; The first preheating part (3), the second preheating part (4), the third preheating part (5), the forming part (6), the first cooling part (7), the second cooling part (8) A plurality of lower heating plates (11a)~lower heating plates (11f) for placing the mold (200) are installed on the inner bottom surface of the cavity (1), and a plurality of actuators (10a)~actuator (10f) ) driven to move up and down the upper heating plate (12a) ~ upper heating plate (12f) corresponding to the installation of the lower heating plate (11a) ~ lower heating plate (11f). 2. The mobile terminal 3D protective glass cover thermoforming device according to claim 1, characterized in that the inert protective gas whose thermal conductivity is higher than that of pure nitrogen is a mixed gas obtained by mixing nitrogen and helium in a certain proportion. 3. The mobile terminal 3D protective glass cover thermoforming device according to claim 2, characterized in that, in the mixed gas composed of nitrogen and helium, the mass ratio of nitrogen and helium ranges from 5 to 1000. 4. The mobile terminal 3D protective glass cover thermoforming device according to claim 3, characterized in that, in the mixed gas composed of nitrogen and helium, the mass ratio of nitrogen and helium ranges from 70 to 100. 5 . The thermocompression molding device for a 3D protective glass cover of a mobile terminal according to claim 1 , wherein the molding part is detachably connected to the upper mold. 6 . 6. The mobile terminal 3D protective glass cover thermocompression molding device according to claim 5, characterized in that, Also includes a second upper mold (230), the second upper mold (230) is composed of an upper mold (231) and an upper mold forming part (232), and the upper mold forming part (232) is combined with the upper mold (231) The bottom surface profile of the bottom surface is formed with an upper molding surface (233) for molding the end portion of the flat glass (201); The guide (240) is installed between the second upper mold (230) and the second lower mold (250) and guides the upper mold forming part (232) to move up and down; The second lower mold (250) is composed of a lower template (251) and a supporting part (252). The supporting part (252) protrudes upwards and is combined with the upper profile of the lower template (251) with bolts (203). Then a lower molding surface (253) corresponding to the upper molding surface (233) is formed. 7. The mobile terminal 3D protective glass cover thermocompression molding device according to claim 6, characterized in that, In order to prevent the deformation of the middle part of the flat glass (201) during molding, it also includes: An upper middle support frame (234), protruding downward from the middle part of the upper template (231) to support the upper part of the middle part of the flat glass (201) during molding; The lower middle supporting frame (254) is formed to protrude upward from the middle part of the lower formwork (251) to support the lower part of the middle part of the flat glass (201) during molding. 8. The mobile terminal 3D protective glass cover thermocompression molding device according to claim 1, further comprising a mold, the mold comprising: The first upper mold (210) protrudes from the bottom surface of the upper mold body (211) to form a pressing portion (212) that is in surface contact with the flat glass (201) as the molding object. The horizontal plane (213) that is molded on one side, the molding surface (214) that the profile of this horizontal plane (213) forms in a streamlined or required shape and is inclined downward, and 1 to 4 molding surfaces (214) are formed on the horizontal plane ( 213) outline; The first lower mold (220), which houses the flat glass (201), is made of a lower mold body (221), and the lower mold body (221) is provided with a horizontal surface (213) and a molding surface ( 214) of the support surface (222). 9. The mobile terminal 3D protective glass cover thermocompression molding device according to claim 8, characterized in that, The pressing part (212) of the first upper die (210) is formed separately from the upper die body (211), and the clamping groove (211a) for the pressing part (212) to be clamped and combined is formed on the upper die body (211) Therefore, the pressurizing part (212) can be combined with the upper mold body (211) in a detachable manner; The supporting surface (222) of the first lower mold (220) is formed separately from the lower mold body (221), and the engaging groove (221a) that allows the supporting surface (222) to be clamped into the joint is formed on the lower mold body (221) so that the The supporting surface (222) is combined with the lower mold body (221) in a detachable manner.