CN108328913B - Toughened glass homogenizing treatment method and toughened glass - Google Patents
Toughened glass homogenizing treatment method and toughened glass Download PDFInfo
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- CN108328913B CN108328913B CN201810251004.5A CN201810251004A CN108328913B CN 108328913 B CN108328913 B CN 108328913B CN 201810251004 A CN201810251004 A CN 201810251004A CN 108328913 B CN108328913 B CN 108328913B
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B27/00—Tempering or quenching glass products
- C03B27/012—Tempering or quenching glass products by heat treatment, e.g. for crystallisation; Heat treatment of glass products before tempering by cooling
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B32/00—Thermal after-treatment of glass products not provided for in groups C03B19/00, C03B25/00 - C03B31/00 or C03B37/00, e.g. crystallisation, eliminating gas inclusions or other impurities; Hot-pressing vitrified, non-porous, shaped glass products
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Abstract
The invention belongs to the technical field of toughened glass preparation methods, and particularly relates to a toughened glass homogenizing treatment method and toughened glass. The tempered glass homogenizing treatment method comprises the following steps of S1: providing a glass sheet, and carrying out cutting, edging and toughening treatment on the glass sheet; s2: homogenizing the glass raw sheet, wherein the homogenizing process comprises a heating stage, a constant temperature stage and a cooling stage; s3: setting the heating rate of 1.5-4 ℃/s in the heating stage, setting the temperature of 240-300 ℃ in the constant temperature stage, setting the duration of 1.5-2.5 h, and setting the cooling rate of 0.02-0.04 ℃/s in the cooling stage; s4: and (4) removing the glass sheet cooled to 60-70 ℃ out of the homogenizing furnace and continuously cooling to room temperature. The method effectively controls the temperature gradient in the homogenizing furnace by accurately limiting the technological parameters of the homogenizing treatment, and ensures the quality of the toughened glass after the homogenizing treatment.
Description
Technical Field
The invention belongs to the technical field of toughened glass preparation methods, and particularly relates to a toughened glass homogenizing treatment method and toughened glass.
Background
After the toughened glass is toughened, the crystal structure of nickel sulfide crystal grains in the toughened glass is transformed along with the passage of time, the crystal lattice volume of the toughened glass is increased in the transformation process, internal stress is further generated around the toughened glass, and when the internal stress is accumulated to a certain level, the toughened glass can be caused to explode.
In order to prevent the toughened glass from self-explosion in the use process, the toughened glass after toughening treatment needs to be homogenized in a homogenizing furnace, and the detonation test and the residual nickel sulfide elimination are carried out according to the hot dipping principle of the homogenizing furnace. However, the homogenization treatment parameters of the tempered glass in the homogenizing furnace are difficult to control, which can cause the uniformity of the internal structure of the tempered glass to be reduced during homogenization treatment, and further negatively affect the quality of the tempered glass.
Disclosure of Invention
The invention aims to provide a toughened glass homogenizing treatment method and toughened glass, and aims to solve the technical problem that the stability of the toughened glass homogenizing treatment process in the prior art cannot be guaranteed.
In order to achieve the purpose, the invention adopts the technical scheme that: a tempered glass homogenizing treatment method comprises the following steps:
s1: providing a glass sheet, and carrying out cutting, edging and toughening treatment on the glass sheet;
s2: providing a homogenizing furnace, and placing the glass sheet into the homogenizing furnace for homogenizing treatment, wherein the homogenizing treatment consists of a temperature rising stage, a constant temperature stage and a temperature reduction stage;
s3: setting the heating rate of the heating stage to be 1.5-4 ℃/s, setting the temperature of the constant temperature stage to be maintained at 240-300 ℃, setting the duration of the constant temperature stage to be 1.5-2.5 h, and setting the cooling rate of the cooling stage to be 0.02-0.04 ℃/s;
s4: and removing the glass sheet cooled to 60-70 ℃ out of the homogenizing furnace and continuously cooling to room temperature.
Further, the temperature rise rate in the temperature rise stage is 3 ℃/s.
Further, the temperature of the constant temperature stage is kept at 280 ℃ to 300 ℃.
Further, the duration of the constant temperature phase is 2 h.
Further, the cooling rate of the cooling stage is 0.035 ℃/s.
Furthermore, a plurality of thermocouples for measuring the temperature of the glass original sheet are arranged in the homogenizing furnace, the thermocouples are uniformly distributed on the glass original sheet, and the types of the thermocouples are WRN-010/K types.
Furthermore, a control system is arranged in the homogenizing furnace, and the heating system and the thermocouple of the homogenizing furnace are electrically connected with the control system.
Further, the tempering temperature is 570-700 ℃, and in the tempering, heating is continuously carried out according to the thickness of the glass sheet and the heating time parameter of 50-140 s/mm.
Furthermore, a plurality of air inlets are formed in two sides of the bottom of an inner cavity of the homogenizing furnace, an exhaust fan is arranged at the top of the inner cavity, and the glass sheet is placed in the inner cavity for homogenizing treatment.
The invention has the beneficial effects that: according to the toughened glass homogenizing treatment method, the temperature rise rate of the temperature rise stage in the homogenizing treatment process is set to be 1.5-4 ℃/s, so that when the glass sheet is subjected to homogenizing treatment in the homogenizing furnace, the internal tissue of the glass sheet can be uniformly heated, and the problem that the uniformity of the internal tissue is poor in the heating process due to too fast or too slow temperature rise is avoided. And the temperature of the constant temperature stage is kept between 240 ℃ and 300 ℃, and the duration time of the constant temperature stage is set to be 1.5h to 2.5h, so that the original glass sheet is ensured to be in a reasonable temperature range. In the process, the toughened glass with unqualified quality can be subjected to self-explosion, so that the toughened glass which does not reach the standard can be removed. And the cooling rate in the cooling stage is set to be 0.02-0.04 ℃/s, so that the original glass sheet in the high-temperature environment can be gradually cooled slowly, and the defects that the internal structure of the toughened glass has microcracks and the like due to too fast cooling are avoided. Therefore, the toughened glass homogenizing method effectively controls the temperature gradient in the homogenizing furnace and ensures the homogeneity of the internal structure of the toughened glass in the homogenizing process by accurately limiting all parameters of the homogenizing process, thereby effectively ensuring the quality of the toughened glass after homogenizing.
The invention adopts another technical scheme that: the tempered glass is prepared by the tempered glass homogenizing treatment method.
The toughened glass is prepared by adopting the toughened glass homogenizing treatment method, and the toughened glass which is easy to explode automatically can be removed by homogenizing treatment, so that the anti-explosion capability of the toughened glass in the use process is ensured, and the internal tissue uniformity of the toughened glass in the homogenizing treatment process can be ensured, so that the quality of the toughened glass after homogenizing treatment is effectively ensured.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a process flow chart of a tempered glass homogenizing treatment method provided by an embodiment of the invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to fig. 1 are exemplary and intended to be illustrative of the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed 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 one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined 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; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As shown in fig. 1, the tempered glass homogenizing method provided by the embodiment of the present invention includes the following steps:
s1: providing a glass sheet, and carrying out cutting, edging and toughening treatment on the glass sheet;
s2: providing a homogenizing furnace, and placing the glass sheet into the homogenizing furnace for homogenizing treatment, wherein the homogenizing treatment consists of a temperature rising stage, a constant temperature stage and a temperature reduction stage;
s3: setting the heating rate of the heating stage to be 1.5-4 ℃/s, setting the temperature of the constant temperature stage to be maintained at 240-300 ℃, and setting the duration of the constant temperature stage to be 0.02-0.04 ℃/s;
s4: and (4) removing the glass sheet cooled to 60-70 ℃ out of the homogenizing furnace and continuously cooling to room temperature.
According to the toughened glass homogenizing treatment method provided by the embodiment of the invention, the heating rate of the heating stage in the homogenizing treatment process is set to be 1.5-4 ℃/s, so that the internal tissue of the glass sheet can be uniformly heated when the glass sheet is subjected to homogenizing treatment in the homogenizing furnace, and the problem that the uniformity of the internal tissue is poor in the heating process due to too fast or too slow heating is avoided. And further ensuring that the tempered glass does not have stress increase in the tempered glass because the temperature of the constant temperature stage is kept between 240 ℃ and 300 ℃ before reaching the test temperature, and the duration time of the constant temperature stage is set to be 1.5h to 2.5h, so that the glass sheet is firstly ensured to be in a reasonable temperature interval, nickel sulfide is excited in the temperature interval to be converted from alpha phase to beta phase, and then crystal lattices of the nickel sulfide expand. In the process, the toughened glass with unqualified quality can be subjected to self-explosion due to the fact that the toughened glass cannot bear the sharp increase of the internal stress, so that the purpose of rejecting the toughened glass which does not reach the standard is achieved through homogenization treatment, and the toughened glass with qualified quality is screened out through the homogenization treatment. And the cooling rate in the cooling stage is set to be 0.02-0.04 ℃/s, so that the original glass sheet in the high-temperature environment can be gradually cooled slowly, the uniformity of the internal tissue of the original glass sheet in the cooling process is further ensured, the defects that the internal tissue of the tempered glass has microcracks and the like due to the too fast cooling are avoided, and the quality of the tempered glass after the homogenization treatment is ensured. Therefore, the toughened glass homogenizing method effectively controls the temperature gradient in the homogenizing furnace and ensures the homogeneity of the internal structure of the toughened glass in the homogenizing process by accurately limiting all parameters of the homogenizing process, thereby effectively ensuring the quality of the toughened glass after homogenizing.
Further, the temperature rise rate in the temperature rise stage may be 1.5 ℃/s, 2.0 ℃/s, 2.5 ℃/s, 3.0 ℃/s, 3.5 ℃/s, or 4.0 ℃/s. Therefore, the heating rate of the heating stage is limited to the narrow temperature interval of 1.5-4.0 ℃/s, so that the heating rate of the toughened glass in the homogenizing treatment process is reasonable, and the internal tissues can be uniformly heated. The phenomenon that the internal tissues are overheated due to too slow temperature rise is avoided, and the phenomenon that the internal tissues are heated unevenly due to too fast temperature rise is also avoided.
Further, the tapping temperature of the tempered glass can be as follows: 60 ℃, 61 ℃, 62 ℃, 63 ℃, 64 ℃, 65 ℃, 66 ℃, 67 ℃, 68 ℃, 69 ℃ or 70 ℃. So, through setting toughened glass in this temperature interval in the stove of coming out of stove, just so guaranteed toughened glass after the homogenization treatment can enter into room temperature environment with suitable temperature, avoided toughened glass after the homogenization treatment too big and cause the increase of toughened glass internal stress with external temperature gradient.
In this example, as shown in FIG. 1, the temperature rise rate in the temperature rise stage was 3 ℃/s. Specifically, the heating rate of the heating stage is limited to 3 ℃/s, so that the heating efficiency of the toughened glass in the homogenization treatment stage is optimal, and the overall efficiency of the homogenization treatment of the toughened glass is improved. On the other hand, the internal structure of the toughened glass can be uniformly heated in the temperature rise stage, and the phenomenon of nonuniform heating of the internal structure of the toughened glass in the heating process is avoided. Therefore, the heating rate in the heating stage is limited to 3 ℃/s, so that the heating efficiency is guaranteed, and the uneven heating of the internal tissues of the toughened glass is avoided.
In this embodiment, the temperature of the constant temperature stage is maintained at 280 ℃ to 300 ℃. Specifically, the temperature of the constant temperature stage may be 280 deg.C, 281 deg.C, 282 deg.C, 283 deg.C, 284 deg.C, 285 deg.C, 286 deg.C, 287 deg.C, 288 deg.C, 289 deg.C, 290 deg.C, 291 deg.C, 292 deg.C, 293 deg.C, 294 deg.C, 295 deg.C, 296 deg.C, 297 deg.C, 298 deg.
Therefore, the temperature in the constant temperature stage is kept at 280-300 ℃, so that the temperature range can be closer to the temperature range in which nickel sulfide is excited to change phase, the process that nickel sulfide is excited to change phase in the toughened glass in the use process is more effectively simulated, the nickel sulfide in the toughened glass is excited to change phase in the temperature range, internal stress is generated around the toughened glass, the toughened glass with unqualified quality bursts under the action of the internal stress, and the toughened glass with unqualified quality is effectively removed.
Preferably, the temperature of the isothermal stage is maintained at 290 ℃ and the temperature value is closest to the temperature at which the nickel sulfide is induced to change phase. In the temperature range of the constant temperature stage, most toughened glass with unqualified quality can explode automatically, so that the self-explosion rate of the toughened glass subjected to homogenization treatment in the use process is obviously reduced, and the use quality and the safety of the toughened glass are effectively ensured.
In this embodiment, the duration of the thermostatic stage is 2h, as shown in fig. 1. Specifically, by further optimizing the duration of the constant temperature phase to 2h, excessive time occupied by the constant temperature phase of the homogenization treatment is avoided on one hand, and the efficiency of the homogenization treatment is further ensured. On the other hand, the toughened glass is kept for enough time at the temperature level of 290 ℃, so that the nickel sulfide in the toughened glass is fully subjected to phase change, and thus the toughened glass with unqualified quality can be efficiently removed under the condition of fully considering the time factor and the temperature factor of the constant temperature stage of homogenization treatment.
In the present embodiment, as shown in FIG. 1, the temperature decreasing rate in the temperature decreasing stage is 0.035 ℃/s. Specifically, the cooling rate in the cooling stage is optimized to be 0.035 ℃/s, namely, the temperature is reduced by 28.6 ℃ per second, so that the proper cooling rate of the toughened glass can be ensured, and the phenomenon that the internal stress of the toughened glass is increased due to the overlarge temperature gradient in the toughened glass in the cooling process, and the use safety of the toughened glass is influenced is avoided. On the other hand, the temperature reduction rate of the toughened glass can be ensured not to be too slow so as not to influence the integral efficiency of the homogenization treatment.
In this embodiment, a plurality of thermocouples for measuring the temperature of the glass sheet are disposed in the homogenizing furnace, and all the thermocouples are uniformly distributed on the glass sheet, and the types of the thermocouples are all WRN-010/K types. Specifically, a plurality of thermocouples are arranged in the homogenizing furnace, and are uniformly distributed on the glass original sheet, so that the thermocouples can transmit back the temperature of the glass original sheet in real time, further the fine control of the heating rate, the heat preservation temperature and the cooling rate of the glass original sheet is realized, and the precise control of the homogenizing treatment process is realized.
Furthermore, the model of the thermocouple is WRN-010/K type/phi 2 × 14000/0-400 ℃. Therefore, the thermocouple can accurately measure the temperature change within the temperature range of 0-400 ℃, and thus, the temperature range of the homogenization treatment process is covered.
In this embodiment, a control system is disposed in the homogenizing furnace, and the heating system and the thermocouple of the homogenizing furnace are both electrically connected to the control system. Specifically, through making being provided with control system in the homogeneity stove to make heating system and thermocouple all with control system electric connection, control system can carry out real-time regulation and control to the heating system of homogeneity stove according to the data that the thermocouple returned like this, and then guaranteed that the rate of rise of glass original piece in the heating stage keeps at the uniform velocity and accurate, and the heat preservation temperature in the constant temperature stage is in the temperature interval of predetermineeing all the time, and the rate of fall of cooling stage keeps at the uniform velocity and accurate.
In this example, as shown in FIG. 1, the tempering temperature is 570 to 700 ℃ and the tempering is continued with a heating time parameter of 50 to 140s/mm depending on the thickness of the glass original sheet. Specifically, the tempering treatment temperature may be 570 deg.C, 580 deg.C, 590 deg.C, 600 deg.C, 610 deg.C, 620 deg.C, 630 deg.C, 640 deg.C, 650 deg.C, 660 deg.C, 670 deg.C, 680 deg.C, 690 deg.C or 700 deg.C. Therefore, the tempering temperature is set to 570-700 ℃, so that the full tempering of the original glass sheet in the tempering treatment stage is ensured, and the subsequent homogenization treatment process is facilitated to screen the tempered glass.
Further, the toughening treatment temperature is 610-700 ℃. The toughening treatment temperature can be specifically as follows: 610 deg.C, 615 deg.C, 620 deg.C, 625 deg.C, 630 deg.C, 635 deg.C, 640 deg.C, 645 deg.C, 655 deg.C, 660 deg.C, 665 deg.C, 670 deg.C, 675 deg.C, 680 deg.C, 685 deg.C, 690 deg.C, 695 deg.C or 700 deg.C. Therefore, the temperature range of the tempering treatment temperature is further reduced, so that the original glass sheet can be fully tempered in the tempering treatment process.
Preferably, the tempering treatment temperature is 670 ℃. By optimizing the toughening treatment temperature to 670 ℃, on one hand, the original sheet is kept to be fully toughened in the toughening treatment process. On the other hand, the method also avoids the increase of the toughening treatment cost caused by the overhigh toughening treatment temperature setting.
Further, the tempering heating time parameters can be as follows: 50s, 60s, 70s, 80s, 90s, 100s, 110s, 120s, 130s, or 140 s. In the toughening treatment stage, the glass sheet is heated according to the heating time parameter of 50 s-140 s/mm, so that the full toughening of the glass sheet is ensured from the heating time angle.
Furthermore, the toughening heating time parameter can be 60 s-120 s/mm, so that the toughening quality of the original glass sheet after toughening treatment is further ensured by further reducing the toughening time parameter range.
In this embodiment, a plurality of air inlets (not shown) are disposed on both sides of the bottom of the inner cavity of the homogenizing furnace, an exhaust fan (not shown) is disposed on the top of the inner cavity, and the glass sheet is placed in the inner cavity for homogenizing treatment. Specifically, all set up the air intake through the inner chamber bottom both sides at the homogeneity stove, external cooling wind can carry out the air cooling to toughened glass in blowing into the inner chamber from air intake department like this and handle, because the inner chamber top still is provided with the air exhauster, has just so further promoted the cooling efficiency of toughened glass in the cooling stage.
The embodiment of the invention also provides a tempered glass homogenizing device prepared by the tempered glass homogenizing method.
The toughened glass is prepared by adopting the toughened glass homogenizing treatment method, and the toughened glass which is easy to explode automatically can be removed by homogenizing treatment, so that the anti-explosion capability of the toughened glass in the use process is ensured, and the internal tissue uniformity of the toughened glass in the homogenizing treatment process can be ensured, so that the quality of the toughened glass after homogenizing treatment is effectively ensured.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A toughened glass homogenizing treatment method is characterized by comprising the following steps: the method comprises the following steps:
s1: providing a glass sheet, and carrying out cutting, edging and toughening treatment on the glass sheet; the tempering temperature is 570-700 ℃, and in the tempering treatment, the glass sheet is continuously heated according to the thickness of the glass sheet and the heating time parameter of 50-140 s/mm;
s2: providing a homogenizing furnace, and placing the glass sheet into the homogenizing furnace for homogenizing treatment, wherein the homogenizing treatment consists of a temperature rising stage, a constant temperature stage and a temperature reduction stage; a plurality of thermocouples for measuring the temperature of the glass original sheet are arranged in the homogenizing furnace, the thermocouples are uniformly distributed on the glass original sheet, and the types of the thermocouples are WRN-010/K types;
s3: setting the heating rate of the heating stage to be 1.5-4 ℃/s, setting the temperature of the constant temperature stage to be maintained at 240-300 ℃, setting the duration of the constant temperature stage to be 1.5-2.5 h, and setting the cooling rate of the cooling stage to be 0.02-0.04 ℃/s;
s4: and removing the glass sheet cooled to 60-70 ℃ out of the homogenizing furnace and continuously cooling to room temperature.
2. The tempered glass homogenizing method according to claim 1, wherein: the heating rate of the heating stage is 3 ℃/s.
3. The tempered glass homogenizing method according to claim 1, wherein: the temperature of the constant temperature stage is kept at 280-300 ℃.
4. The tempered glass homogenizing method according to claim 1, wherein: the duration of the constant temperature phase is 2 h.
5. The tempered glass homogenizing method according to claim 1, wherein: the cooling rate of the cooling stage is 0.035 ℃/s.
6. The tempered glass homogenizing method according to claim 1, wherein: and a control system is arranged in the homogenizing furnace, and the heating system of the homogenizing furnace and the thermocouple are electrically connected with the control system.
7. The tempered glass homogenizing method according to any one of claims 1 to 5, wherein: the glass homogenizing furnace is characterized in that a plurality of air inlets are formed in two sides of the bottom of an inner cavity of the homogenizing furnace, an exhaust fan is arranged at the top of the inner cavity, and the glass sheet is arranged in the inner cavity for homogenizing treatment.
8. A tempered glass is characterized in that: the tempered glass homogenizing treatment method according to any one of claims 1 to 7.
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| CN111186984B (en) * | 2020-02-28 | 2022-10-21 | 福州新福兴玻璃科技有限公司 | Super-huge glass batch mixes machine |
| CN113754262A (en) * | 2020-06-19 | 2021-12-07 | 江西省亚华电子材料有限公司 | Camera lens processing technology |
| CN111777319A (en) * | 2020-07-01 | 2020-10-16 | 洛阳北方玻璃技术股份有限公司 | Continuous homogenizing method for toughened glass |
| CN115448585B (en) * | 2022-09-02 | 2023-10-27 | 无锡市璞宏工程玻璃有限公司 | Processing technology and homogenizing system for reducing self-explosion rate of heat-insulating toughened glass |
| CN116282869B (en) * | 2023-03-24 | 2023-09-29 | 南京我乐家居股份有限公司 | Intelligent production control method and system for toughened glass |
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