CN111592212A - 3D glass hot bending method - Google Patents
3D glass hot bending method Download PDFInfo
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- CN111592212A CN111592212A CN202010474752.7A CN202010474752A CN111592212A CN 111592212 A CN111592212 A CN 111592212A CN 202010474752 A CN202010474752 A CN 202010474752A CN 111592212 A CN111592212 A CN 111592212A
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/02—Re-forming glass sheets
- C03B23/023—Re-forming glass sheets by bending
- C03B23/035—Re-forming glass sheets by bending using a gas cushion or by changing gas pressure, e.g. by applying vacuum or blowing for supporting the glass while bending
- C03B23/0352—Re-forming glass sheets by bending using a gas cushion or by changing gas pressure, e.g. by applying vacuum or blowing for supporting the glass while bending by suction or blowing out for providing the deformation force to bend the glass sheet
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- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
The invention discloses a 3D glass hot bending method, which comprises the following steps: assembling, pressing, heating, air inlet, negative pressure pumping, pressure maintaining and forming, pressure maintaining and cooling and demoulding. The glass is processed by controllable hot pressing through a 3D glass hot bending method of hot air pressure hot bending molding. The forming method has the advantages of simple structure, energy conservation, consumption reduction, high reliability, no damage to the surface of a product, high product qualification rate, intelligent control, simpler and more convenient operation and advanced technology.
Description
Technical Field
The invention relates to the field of glass processing, in particular to a 3D glass hot bending method.
Background
Hot bending is a process of heating a workpiece to a predetermined bending temperature of the workpiece and then bending the workpiece. The 3D glass hot bending forming is a high-precision technological process for quickly producing 3D glass by putting base material glass and a mold into a forming chamber and sequentially carrying out the working procedures of preheating, pressure forming, pressure maintaining, cooling and the like according to set beat and temperature. The common 3D glass hot bending technology is a forming method of assembling an upper die and a lower die and then performing upper die and lower die pressing, and the method has the advantages that the upper die is always in direct contact with the upper surface of glass and generates external active pressing force, so that a special layer such as an AG layer preprocessed on the surface of the glass can be damaged, and the quality of the glass is influenced.
The conventional upper and lower die assembly mode for hot bending can affect the sequence of AG process treatment and hot bending forming in a 3D glass manufacturing process, and the upper and lower die assembly mode can damage an AG layer, so the upper and lower die assembly mode is required to be carried out after the glass is subjected to hot bending forming, but the prior three main AG glass surface treatment methods cannot rapidly solve the AG of the 3D glass at low cost, are non-adjustable spearheads, and therefore the 3D glass AG method cannot be solved or the hot bending method without damaging the AG is required to be solved.
For example, a 3D glass bending apparatus disclosed in chinese literature, which is under the publication number CN209352773U, discloses a 3D glass bending apparatus comprising: hot bending the matrix: the hot bending matrix is arranged in a heating cavity, a sectional heating coil, a pressing die assembly, a cylinder assembly and a hot pressing die; the sectional heating coil surrounds the inner side wall of the heating cavity horizontally arranged on the hot bending matrix and comprises a high-power section, a medium-power section and a low-power section, wherein the medium-power section is arranged at the middle section of the sectional heating coil and connected with the medium-power section at two sides, and the high-power section is arranged at two sides of the medium-power section; the die assembly comprises an upper die plate and a lower die plate, the upper die plate is arranged at the lower end in the heating cavity, and the lower die plate is arranged at the upper end in the heating cavity; the air cylinder assembly comprises an upper pressing air cylinder and a lower pressing air cylinder, the upper pressing air cylinder is arranged on the outer side of the lower end of the hot bending base body and is connected with the upper pressing template through a first air pressure shaft, and the lower pressing air cylinder is arranged on the outer side of the upper end of the hot bending base body and is connected with the lower pressing template through a second air pressure shaft; the hot pressing die is arranged in the heating cavity and is arranged between the upper pressing die plate and the lower pressing die plate. In this patent, go up the die plate and carry out work machining with the die plate down, can destroy the work piece surface, influence the quality of processing glass.
For example, a "hot bending processing apparatus and a method for processing a 3D curved glass cover plate" disclosed in chinese patent document, which relates to the field of processing a 3D curved glass cover plate, is disclosed in No. CN110451786A, and provides a hot bending processing apparatus including a heating module and an adsorption mold having an adsorption surface hot bending groove conforming to the surface shape of a target 3D curved glass cover plate, and having an adsorption surface provided with an air suction hole, through which air is drawn, and a glass cover plate to be hot bent is hot-bent into the target 3D curved glass cover plate by using a pressure difference; the method for processing the 3D curved glass cover plate comprises the steps of arranging the glass cover plate on the adsorption surface, extracting gas between glass to be bent and the adsorption surface while heating, and attaching the glass to the adsorption surface under the action of air pressure difference to form the 3D curved glass cover plate after being bent. In this patent, inhale through the suction hole and form pressure differential and treat that the glass of processing is processed, in the course of working, the pressure differential is uncontrollable, and processingquality can not guarantee, and in the course of working, glass surface temperature can not be guaranteed, is unfavorable for the glass shaping.
Disclosure of Invention
The method aims to solve the problem that the glass hot bending method in the prior art cannot ensure the surface quality of glass; the processing quality is low; according to the 3D glass hot bending method for hot air pressure hot bending molding, the glass is processed through controllable hot pressing, the mechanism is simple, energy is saved, consumption is reduced, reliability is high, and the product percent of pass is high; meanwhile, intelligent control can be realized, and the operation is simple.
In order to solve the technical problems, the invention is realized by the following technical scheme:
A3D glass hot bending method comprises the following steps:
(1) loading a glass blank to be processed into a cavity of a lower die;
(2) pressing down, namely pressing down an upper pressing head to form sealing with the cavity of the lower die and enabling the cavity to form an upper die cavity and a lower die cavity through the glass blank;
(3) heating, namely heating the glass blank loaded in the cavity to a required temperature;
(4) introducing gas, namely introducing the preheated gas into the upper die cavity and forming a positive hot air pressure of 50-100 kpa;
(5) negative pressure is pumped, gas in the lower die cavity is pumped, and negative pressure of 50-80 kpa is formed in the lower die cavity;
(6) maintaining the pressure for molding, and keeping the positive hot air pressure and the negative air pressure for 1min-2 min;
(7) maintaining the pressure and cooling, and maintaining the pressure and naturally cooling to room temperature;
(8) and (6) demolding.
Further, the temperature required in the step (3) is 800 ℃.
Further, the positive hot air pressure formed in the step (4) is 80 kpa.
Further, the negative air pressure formed in the step (5) is 70 kpa.
Further, the pressure maintaining and forming time of the step (6) is 2 min.
Compared with the prior art, the invention has the advantages that: the forming method has the advantages of simple structure, energy conservation, consumption reduction, high reliability, no damage to the surface of a product, high product qualification rate, intelligent control, simpler and more convenient operation and advanced technology.
Drawings
FIG. 1 is a schematic view of the present invention.
FIG. 2 is a schematic diagram of the present invention.
FIG. 3 is an enlarged view of the surface of AG glass in one embodiment of the present invention.
1. An air intake system; 3. preheating a plate; 4. heating plates; 5. a vapor chamber; 6. a lower die; 9. a vacuum pumping system; 10. sealing the cavity; 11. a lower die lower cavity; 12. an air exhaust hole; 13. a cavity; 14. AG glass; 15. an upper pressure head; 16. a lower supporting pressure head; 17. a drive device.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1, 2 and 3, a first embodiment of a 3D glass hot bending method of the present invention comprises the following steps: the glass blank adopts AG glass after AG treatment.
(1) A package, AG glass 14, is loaded into the cavity 13 of the lower mold 6;
(2) the upper pressure head 15 is pressed down through the driving device 17 and forms a sealed cavity 10 with the cavity 13 of the lower die 6, the method provides a reliable processing environment and ensures the production quality of products to a certain extent; the AG glass 14 divides the cavity 13 into an upper cavity and a lower cavity;
(3) heating, namely heating the AG glass 14 loaded in the cavity 13 to 800 ℃, wherein the AG glass 14 is beneficial to processing hot bending at 800 ℃, and simultaneously the performance of the material is ensured, and the AG layer on the surface cannot be influenced by overhigh temperature;
(4) air is fed, and after the air provided by the air inlet system 1 is subjected to heat treatment by the preheating plate 3, the heating plate 4 and the soaking plate 5, the treated air is introduced into the upper cavity to form a positive hot air pressure of 80 kpa; the heated AG glass 14 is subjected to hot air pressure hot bending processing through the provided hot air pressure, an AG layer on the surface of the AG glass 14 is ensured, the characteristics of a product are ensured, and the performance of the product is not damaged;
(5) the method comprises the steps of pumping negative pressure, namely pumping gas in the lower die cavity away through a pumping hole 12 by using a vacuum pumping system 9, so that negative pressure of 70kpa is formed in the lower die cavity, always keeping a certain pressure difference between the upper surface and the lower surface of AG glass 14, ensuring the production quality of a formed product, and simultaneously, enabling the lower die 6 to be of a porous structure, pumping negative pressure in the lower die lower cavity 11 during negative pressure pumping, so that the lower die 6 is fastened on a lower support pressure head 16, deviation is avoided, and the product forming quality is ensured;
(6) pressure maintaining molding, wherein the pressure difference is kept unchanged for 2min, and the AG glass 14 can be rapidly and fully molded by the pressure maintaining of 2 min;
(7) pressure maintaining cooling, wherein in order to ensure that the production quality of the product is influenced by the influence of temperature and environment in the cooling process, pressure maintaining molding is adopted, so that the molding is more stable;
(8) and (5) demolding, namely demolding the cooled product to obtain the product.
The surface treatment layer of the glass formed by hot-air pressure hot bending is protected, the surface treatment of the glass can be firstly carried out, and the glass is formed by the forming method, so that the forming method has the advantages of simple structure, energy conservation, consumption reduction, high reliability, high product percent of pass, intelligent control and simpler and more convenient operation; the time from heating to pressure maintaining cooling in the whole process is 8-12 min, and the rapid forming improves the production efficiency; the method of processing glass and then processing the surface treatment layer can lead to uneven and unstable adhesion of the surface treatment layer.
In the embodiment, AG glass 14 is adopted, and the hot bending point is 800 ℃; in other embodiments, different glasses may be adopted, and different glasses have different hot bending points, for example, the hot bending point of common glass is 600 ℃, the hot bending point of transparent float glass is 750 ℃, and the like, and specific embodiments are not described in detail; a too high temperature may cause pocking marks or deformation, and a too low temperature may result in insufficient hot-bending.
The above description is only an embodiment of the present invention, but the technical features of the present invention are not limited thereto, and any changes or modifications within the technical field of the present invention by those skilled in the art are covered by the claims of the present invention.
Claims (9)
1. A3D glass hot bending method is characterized by comprising the following steps:
(1) loading a glass blank to be processed into a cavity of a lower die;
(2) pressing down, namely pressing down an upper pressing head to form sealing with the cavity of the lower die and enabling the cavity to form an upper die cavity and a lower die cavity through the glass blank;
(3) heating, namely heating the glass blank loaded in the cavity to a required temperature;
(4) introducing gas, namely introducing the preheated gas into the upper die cavity and forming a positive hot air pressure of 50-100 kpa;
(5) negative pressure is pumped, gas in the lower die cavity is pumped, and negative pressure of 50-80 kpa is formed in the lower die cavity;
(6) maintaining the pressure for molding, and keeping the positive hot air pressure and the negative air pressure for 1min-2 min;
(7) maintaining the pressure and cooling, and maintaining the pressure and naturally cooling to room temperature;
(8) and (6) demolding.
2. The 3D glass hot bending method according to claim 1, wherein: the temperature required in step (3) is 800 ℃.
3. The 3D glass hot bending method according to claim 1 or 2, characterized in that: the positive hot air pressure formed in the step (4) is 80 kpa.
4. The 3D glass hot bending method according to claim 1 or 2, characterized in that: the negative air pressure formed in the step (5) is 70 kpa.
5. The 3D glass hot bending method according to claim 3, wherein: the negative air pressure formed in the step (5) is 70 kpa.
6. The 3D glass hot bending method according to claim 1 or 2, characterized in that: and (4) keeping the pressure and forming time of the step (6) to be 2 min.
7. The 3D glass hot bending method according to claim 3, wherein: and (4) keeping the pressure and forming time of the step (6) to be 2 min.
8. The 3D glass hot bending method according to claim 4, wherein: and (4) keeping the pressure and forming time of the step (6) to be 2 min.
9. The 3D glass hot bending method according to claim 5, wherein: and (4) keeping the pressure and forming time of the step (6) to be 2 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010474752.7A CN111592212A (en) | 2020-05-29 | 2020-05-29 | 3D glass hot bending method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010474752.7A CN111592212A (en) | 2020-05-29 | 2020-05-29 | 3D glass hot bending method |
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| CN111592212A true CN111592212A (en) | 2020-08-28 |
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| CN202010474752.7A Pending CN111592212A (en) | 2020-05-29 | 2020-05-29 | 3D glass hot bending method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112299690A (en) * | 2020-11-16 | 2021-02-02 | 凯盛科技集团有限公司 | Hot bending die for preventing edge collapse defect of ultrathin curved glass cover plate |
| CN114646218A (en) * | 2022-05-19 | 2022-06-21 | 蒙娜丽莎集团股份有限公司 | Rock plate hot bending furnace and method for hot bending rock plate |
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| CN109942179A (en) * | 2017-12-20 | 2019-06-28 | 维达力实业(深圳)有限公司 | Differential hot bending shape system and hot bending shape method |
| CN209081723U (en) * | 2018-11-13 | 2019-07-09 | 深圳市诺峰光电设备有限公司 | A kind of glass evacuated absorption of 3D and hot-press arrangement |
| CN110040945A (en) * | 2019-03-13 | 2019-07-23 | 深圳市东方碳素实业有限公司 | A kind of production method of hot bending mobile phone glass cover board |
| CN110451786A (en) * | 2018-05-08 | 2019-11-15 | 凯茂科技(深圳)有限公司 | A kind of hot bending process equipment and the method for processing 3D bend glass cover board |
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2020
- 2020-05-29 CN CN202010474752.7A patent/CN111592212A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109942179A (en) * | 2017-12-20 | 2019-06-28 | 维达力实业(深圳)有限公司 | Differential hot bending shape system and hot bending shape method |
| CN110451786A (en) * | 2018-05-08 | 2019-11-15 | 凯茂科技(深圳)有限公司 | A kind of hot bending process equipment and the method for processing 3D bend glass cover board |
| CN209081723U (en) * | 2018-11-13 | 2019-07-09 | 深圳市诺峰光电设备有限公司 | A kind of glass evacuated absorption of 3D and hot-press arrangement |
| CN110040945A (en) * | 2019-03-13 | 2019-07-23 | 深圳市东方碳素实业有限公司 | A kind of production method of hot bending mobile phone glass cover board |
Non-Patent Citations (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112299690A (en) * | 2020-11-16 | 2021-02-02 | 凯盛科技集团有限公司 | Hot bending die for preventing edge collapse defect of ultrathin curved glass cover plate |
| CN114646218A (en) * | 2022-05-19 | 2022-06-21 | 蒙娜丽莎集团股份有限公司 | Rock plate hot bending furnace and method for hot bending rock plate |
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Application publication date: 20200828 |