CN113213776A - Strengthening method for strong glass - Google Patents
Strengthening method for strong glass Download PDFInfo
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- CN113213776A CN113213776A CN202110694718.5A CN202110694718A CN113213776A CN 113213776 A CN113213776 A CN 113213776A CN 202110694718 A CN202110694718 A CN 202110694718A CN 113213776 A CN113213776 A CN 113213776A
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- 239000011521 glass Substances 0.000 title claims abstract description 137
- 238000005728 strengthening Methods 0.000 title claims abstract description 117
- 238000000034 method Methods 0.000 title claims abstract description 23
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims abstract description 74
- 235000010333 potassium nitrate Nutrition 0.000 claims abstract description 37
- 239000004323 potassium nitrate Substances 0.000 claims abstract description 37
- 238000000137 annealing Methods 0.000 claims abstract description 14
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 238000005496 tempering Methods 0.000 claims description 21
- 238000002791 soaking Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 description 6
- 239000000178 monomer Substances 0.000 description 5
- 239000005354 aluminosilicate glass Substances 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 230000003203 everyday effect Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000013001 point bending Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 244000062793 Sorghum vulgare Species 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000004579 marble Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 235000019713 millet Nutrition 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 239000006058 strengthened glass Substances 0.000 description 1
- 239000005341 toughened glass Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C21/00—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface
- C03C21/001—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions
- C03C21/002—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions to perform ion-exchange between alkali ions
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Surface Treatment Of Glass (AREA)
Abstract
A strengthening method of strong glass comprises a strengthening device, wherein the strengthening device comprises a hoisting device, a preheating furnace, a first toughening furnace, a second toughening furnace, a strengthening furnace and an annealing furnace, and the strengthening method comprises the following steps: respectively filling the same potassium nitrate solution in a first toughening furnace, a second toughening furnace and a strengthening furnace; the temperatures of the first toughening furnace, the second toughening furnace and the strengthening furnace are all kept at 420 ℃ in 410-; putting a plurality of glass products into a preheating furnace, and preheating the glass products in the preheating furnace; then taking out the glass product, and respectively putting the glass product into a first toughening furnace and a second toughening furnace; then putting the glass product into a strengthening furnace; and taking the glass product out of the strengthening furnace, putting the glass product into an annealing furnace for annealing and cooling, and finishing the secondary strengthening of the glass product. The invention ensures that the strength of the glass product meets the requirement by matching the toughening furnace and the strengthening furnace, can effectively prolong the service time of potassium nitrate solution in the toughening furnace and the strengthening furnace, and reduces the production cost.
Description
Technical Field
The invention relates to the technical field of glass strengthening, in particular to a strengthening system and a strengthening method for strong glass.
Background
In the glass processing process, the strength of the glass can be effectively improved through strengthening treatment. However, in the actual production process, in order to improve the service performance of the glass, different processing is often required to be performed on different surfaces of the glass so that the different surfaces of the glass exhibit different properties, and then the glass is strengthened.
In the glass industry, with higher and higher requirements of terminal brands (Huashi, oppo, vivo, millet and the like) on the strengthening performance of glass, although the traditional strengthening mode can meet the requirements of customer strengthening parameters, the performance is often uneven when the parameters are met; and the potassium nitrate for strengthening has limited service life and high cost.
Disclosure of Invention
In order to solve the technical problems, the invention provides a strengthening and strengthening method of strong glass, aiming at strengthening the strong glass again, effectively prolonging the service time of potassium nitrate solution and ensuring the strengthening performance of the glass.
In order to solve the technical problems, the invention adopts the following technical scheme:
a strengthening method of strong glass comprises a strengthening device, wherein the strengthening device comprises a hoisting device, a preheating furnace, a first toughening furnace, a second toughening furnace, a strengthening furnace and an annealing furnace, and the strengthening method comprises the following steps:
respectively filling the same potassium nitrate solution in a first toughening furnace, a second toughening furnace and a strengthening furnace;
the temperatures of the first toughening furnace, the second toughening furnace and the strengthening furnace are all kept at 420 ℃ in 410-;
putting a plurality of glass products into a preheating furnace, and preheating the glass products in the preheating furnace;
then taking out the glass product through the hoisting device, respectively putting the glass product into a first toughening furnace and a second toughening furnace, and soaking the glass product in a potassium nitrate solution at the temperature of 410-420 ℃ for 5.5-6 hours for toughening;
taking the glass product out of the first toughening furnace and the second toughening furnace through the hoisting device, putting the glass product into a strengthening furnace, and soaking the glass product in a potassium nitrate solution at the temperature of 410-420 ℃ for 30-35 minutes;
and taking the glass product out of the strengthening furnace, putting the glass product into an annealing furnace for annealing and cooling to finish the strengthening of the glass product.
And after the glass product is taken out from the first toughening furnace and the second toughening furnace, the glass product is put into a strengthening furnace within 3-5 minutes.
The temperature of the glass product taken out of the first toughening furnace and the second toughening furnace is between 410 ℃ and 420 ℃, and the temperature of the glass product is more than 390 ℃ when the glass product is placed into the strengthening furnace.
The first toughening furnace, the second toughening furnace and the strengthening furnace are filled with 1.5 tons of potassium nitrate solution, and a set amount of glass products are put in the first toughening furnace, the second toughening furnace and the strengthening furnace at one time.
In one day, 3 batches of glass products are respectively toughened by the first toughening furnace and the second toughening furnace, the toughening time of each batch of glass products is the same, and the toughening time of the toughening furnace is the same for toughening 6 batches of glass products, and the toughening time of each batch of glass products is the same.
The potassium nitrate solutions in the first toughening furnace and the second toughening furnace are used for 29 days to respectively treat 87 batches of glass products, and then the potassium nitrate solution needs to be replaced; after the potassium nitrate solution in the strengthening furnace was used for 21 days, the strengthening furnace was changed to a toughening furnace for use, or the potassium nitrate solution in the strengthening furnace was replaced.
The toughening time of the first toughening furnace and the toughening time of the second toughening furnace are both 6 hours; the strengthening time of the strengthening furnace is 0.5 hour.
After the glass product is secondarily strengthened by the first toughening furnace and the strengthening furnace, the stress intensity CS of the glass product is always larger than 760mpa, and the stress depth DOL is larger than or equal to 40um, so that the product is always in the optimal parameter state.
According to the invention, through the matching of the toughening furnace and the strengthening furnace and the limitation of the corresponding toughening time and strengthening time, the strengthening performance of the glass is ensured to be always in an optimal parameter, and the secondary strengthening is carried out according to the method for the strong glass, namely the glass which is strengthened for the first time, so that the service time of the potassium nitrate solution in the toughening furnace and the strengthening furnace can be effectively prolonged, and the production cost is saved.
Drawings
FIG. 1 is a schematic structural view of the reinforcing apparatus of the present invention;
FIGS. 2 and 3 are schematic diagrams of the glass strengthening parameter curves of a single toughening furnace;
FIGS. 4 and 5 are schematic diagrams of the strengthening parameter curves of the toughening furnace of the present invention.
Detailed Description
For further understanding of the features and technical means of the present invention, as well as the specific objects and functions attained by the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.
As shown in the attached figure 1, the invention discloses a strengthening method of strong glass, which comprises a strengthening device, wherein the strengthening device comprises a hoisting device, a preheating furnace, a first toughening furnace, a second toughening furnace, a strengthening furnace and an annealing furnace, the strengthening furnace can be usually arranged in the middle area of the first toughening furnace and the second toughening furnace, the glass product is convenient to take and place, and the hoisting device is arranged above the strengthening furnace, so that the glass product is automatically taken and placed.
The method comprises the following steps:
the first toughening furnace, the second toughening furnace and the strengthening furnace are respectively filled with the same potassium nitrate solution which adopts the known solution in the prior art,
the temperatures of the first toughening furnace, the second toughening furnace and the strengthening furnace are all kept at 410-420 ℃, and the temperatures of the first toughening furnace, the second toughening furnace and the strengthening furnace are all enabled to reach the set temperature values through heating and are kept, so that the strengthening performance of the glass product is enabled to reach the best.
A plurality of glass products are put into a preheating furnace, the glass products are preheated in the preheating furnace, the temperature after preheating generally reaches about 380 ℃, and the glass products can be better treated in a toughening furnace and a strengthening furnace through preheating treatment. The glass product is a glass sheet that has undergone a strengthening process.
And then taking out the glass product through the hoisting device, respectively putting the glass product into a first toughening furnace and a second toughening furnace, and soaking the glass product in a potassium nitrate solution at the temperature of 410-420 ℃ for 5.5-6 hours for toughening, so as to improve the stress strength and the stress depth of the glass product.
And taking the glass product out of the first toughening furnace and the second toughening furnace through the hoisting device, putting the glass product into a strengthening furnace, and soaking the glass product in a potassium nitrate solution at the temperature of 410-420 ℃ for 30-35 minutes.
And taking the glass product out of the strengthening furnace, putting the glass product into an annealing furnace for annealing and cooling, and cooling to normal temperature to finish the strengthening of the glass product.
In addition, the glass product is placed into the strengthening furnace within 3-5 minutes after being taken out of the first toughening furnace and the second toughening furnace and under the condition that the temperature of the glass product is higher than 390 ℃.
The first toughening furnace, the second toughening furnace and the strengthening furnace are filled with 1.5 tons of potassium nitrate solution, and a set amount of glass products are put in the first toughening furnace, the second toughening furnace and the strengthening furnace at one time. In one day, 3 batches of glass products are respectively toughened by the first toughening furnace and the second toughening furnace, the toughening time of each batch of glass products is the same, and the toughening time of the toughening furnace is the same for toughening 6 batches of glass products, and the toughening time of each batch of glass products is the same. The potassium nitrate solutions in the first toughening furnace and the second toughening furnace are used for 29 days to respectively treat 87 batches of glass products, and then the potassium nitrate solution needs to be replaced; after the potassium nitrate solution in the strengthening furnace was used for 21 days, the strengthening furnace was changed to a toughening furnace for use, or the potassium nitrate solution in the strengthening furnace was replaced.
In this embodiment, the optimal depth of stress DOL for the glass product is 40-60; the stress intensity CS is more than 760 mp. When CS is more than 760mpa (40um is less than or equal to dol is less than or equal to 46um), the glass strengthening performance is best.
The toughening time of the first toughening furnace and the toughening time of the second toughening furnace are both 6 hours; the strengthening time of the strengthening furnace is 0.5 hour.
When only one toughening furnace is used, generally, the potassium nitrate solution cannot be used for toughening the glass any more after being used for 8 days, otherwise, the glass has poor strengthening performance. In the invention, the toughening furnace and the strengthening furnace are matched for use, so that the secondary strengthening effect on the glass is achieved, and the service life of the potassium nitrate solution can be effectively prolonged.
The glass treated by the method can obtain the performance test result of the glass with the CS of 40-46 and the DOL of more than 760 under the conditions of different CSs and different DOLs
Influence of stress parameters such as CS, DOL and the like on glass strengthening performance
The DOE of the same material (strong glass), the same thickness, different CS and DOL verifies the best ball falling and 4PB performance.
CS: the stress intensity (unit mpa) of the aluminosilicate glass has the general standard CS which is more than or equal to 700 mpa;
DOL: the general standard DOL of the aluminosilicate glass with stress depth (unit um) is more than or equal to 40 mpa;
t: glass protection sheet thickness (in mm);
CT: stopping the glass self-explosion parameters; calculating the formula: CT (CS) DOL/(1000T-2 DOL);
4 PB: the general standard 4PB of the alumino-silicate glass for 4-point bending test of the glass is more than or equal to 60 mpa;
ball falling: the small balls with certain weight freely fall onto certain points on the product from certain height, and the product is fixed on the jig.
The whole machine falls: electronic products such as mobile phones, pen-shaped telephones and the like freely fall onto the marble from a certain height.
Watch 1
Analysis in Table I: under the condition of a fixed dol range (40-42), the 4PB data is obviously improved along with the continuous improvement of CS, the proportion of falling balls and breaking screens of glass monomers is reduced, and the proportion of falling balls and breaking screens of the whole machine is also reduced. When CS is larger than 760mpa, the 4pb mean value is above 800mpa, and the proportion of ball falling, screen breaking and complete machine falling and breaking is low.
Watch two
Analysis in Table II: under the condition of a fixed dol range (42-44), the 4PB data is obviously improved along with the continuous improvement of CS, the proportion of falling balls and breaking screens of glass monomers is reduced, and the proportion of falling balls and breaking screens of the whole machine is also reduced. When CS is larger than 760mpa, the 4pb mean value is above 800mpa, and the proportion of ball falling, screen breaking and complete machine falling and breaking is low.
Watch III
Analysis in table three: 1. under the condition of a fixed dol range (44-46), the 4PB data is obviously improved along with the continuous improvement of CS, the proportion of falling balls and breaking screens of glass monomers is reduced, and the proportion of free falling and breaking screens of the whole machine is also reduced. When CS is larger than 760mpa, the 4pb mean value is above 800mpa, and the proportion of ball falling, screen breaking and complete machine falling and breaking is low.
And (3) knotting:
1, dol (46-48) and dol (40-42), (42-44), (44-46) do not differ much in their 4PB and ball drop performance.
CT values are all within specification.
It is concluded from the analysis of first, second and third images:
1. the glass strengthening performance has a great relationship with CS, 4PB test data is obviously improved along with the increase of CS, and the falling ball screen breaking probability and the free falling probability of the whole machine of the cover plate monomer are reduced along with the increase of CS;
2, dol, the fluctuation of the interval of 40-46um has no obvious influence on the performance;
3. when CS is larger than or equal to 760mpa, the 4PB mean value can meet more than 800mpa, and the ratio of the cover plate monomer to the whole screen breaking is very low.
For review; when CS is more than 760mpa (40um is less than or equal to dol is less than or equal to 46um), the glass strengthening performance is best.
The preferred embodiment of the present invention is as follows:
1.5 tons of potassium nitrate solution are filled in the first toughening furnace, the second toughening furnace and the strengthening furnace, and the temperature is kept at 415 ℃.
Putting a set amount of glass products into the first tempering furnace and the second tempering furnace respectively, and correspondingly putting the glass products into the first tempering furnace and the second tempering furnace
The jig was assembled and immersed in a potassium nitrate solution at a temperature of 415 c for a holding time of 6 hours.
And then taking out the glass product, transferring the glass product into an enhancement furnace within 5 minutes, and detecting the temperature to ensure that the heat preservation temperature of the glass product is more than 390 ℃ when the glass product is placed into the enhancement furnace. If the temperature is lower than this temperature value, the strengthening performance of the glass product is affected. And keeping the temperature in the strengthening furnace at 415 ℃ for 0.5 hour.
And then taking out the glass product from the strengthening furnace, putting the glass product into an annealing furnace for annealing and cooling treatment, and cooling to room temperature to finish secondary strengthening of the glass.
In the actual use time, the potassium nitrate solutions in the first tempering furnace and the second tempering furnace can be used for a prolonged period of 29 days under the condition of ensuring the tempering performance, the tempering is carried out according to 3 batches each day and 6 hours each batch, the strengthening furnace is used for 3 hours each day and 3 hours each day for 6 batches each and 0.5 hour each batch, and the strengthening furnace can be used for 63 hours each day for 21 days, so that the best performance can be ensured in the period.
According to the processing mode, the stress intensity CS of the glass is larger than 760mpa, the stress intensity CS is larger than 40um and smaller than dol and smaller than 46um, the mean value of 4PB can meet 800mpa, and the optimal glass strengthening is realized.
Watch four
In the first table, a single toughening furnace, CS, DOL of the toughening furnace and the monitored value transition graph every day.
#1 tempering furnace, 1.5 tons of potassium nitrate solution, 3500 pcs/furnace, tempering time: 6.5H, temperature: 415 °; 3-4 furnaces are tempered every day, namely 3-4 batches are processed.
Alumino-silica glass material- -conventional reinforcement standard: CS is more than or equal to 700mpa, DOL is more than or equal to 40um, and CT is less than or equal to 67mpa (the product thickness is 0.7).
As shown in the attached figures 2 and 3, the CS value of the toughening furnace is gradually reduced when the CS is more than 760mpa in the 1 st to 8 th days, and the CS value is gradually reduced along with the time. After 14 days CS < 700mpa, the eligibility criterion has been exceeded.
In the #1 toughening furnace, DOL can meet the requirement from 1 st to 14 th days, and the DOL is reduced gradually along with the time.
And (4) conclusion:
CS is more than 760mpa (when CS is more than or equal to 760mpa, the strengthening performance is best) for only 8 days; beyond 8 days the CS value decreased below 760mpa, the risk of performance anomalies for ball drop and 4PB increased.
2. The service life of the potassium nitrate in one furnace is only 14 days; the CS is more than 700mpa for 14 days, and the industry standard passing cannot be met.
Table five, graph of the reinforcement values CS, DOL for the strengthened glass over time per furnace.
As can be seen from the above table, 1, the enhancing parameter CS is changed in a manner that the CS value rises rapidly, then rises slowly, then falls and falls slowly with the passage of time.
2. And the DOL value of the strengthening parameter rapidly rises, then rapidly rises and then slowly rises along with the strengthening time.
As can be seen from the above, if 4 furnaces, namely 4 batches of glass products, are processed in one tempering furnace every day, the CS is more than or equal to 700mpa after 14 days, the industry standard can not be met, namely the tempered glass has unqualified performance.
Therefore, through improvement and the matching use of the toughening furnace and the strengthening furnace, the invention prolongs the service time of potassium nitrate solution in each toughening furnace while ensuring the glass strengthening performance.
As shown in fig. 4 and 5, the service life from day 9 to 29 days is doubled compared with the conventional 14-day service life.
The strengthening parameters CS and DOL both meet the standard, and CS is always in the range of excellent performance of 4PB and a falling ball. 4PB, the general standard 4PB of the alumino-silicate glass for 4-point bending test of the glass is more than or equal to 600 mpa.
The service life of the #1 and #2 toughening furnace is prolonged from 14 days to at least 29 days, and the service life is realized under the condition of ensuring better performance.
#3 strengthening furnace, 6 furnaces per day for a period of 3H per day, and after 21 days, the total strengthening period was 63H. And then the toughening furnace #3 is converted into the toughening furnace #1 or #2 for recycling, and the toughening parameter curve is close to that of the toughening furnace shown in the graph in FIG. 4 and FIG. 5.
Although the present invention has been described in detail with reference to the embodiments, it will be apparent to those skilled in the art that modifications, equivalents, improvements, and the like can be made in the technical solutions of the foregoing embodiments or in some of the technical features of the foregoing embodiments, but those modifications, equivalents, improvements, and the like are all within the spirit and principle of the present invention.
Claims (8)
1. A strengthening method of strong glass comprises a strengthening device, wherein the strengthening device comprises a hoisting device, a preheating furnace, a first toughening furnace, a second toughening furnace, a strengthening furnace and an annealing furnace, and is characterized by comprising the following steps:
respectively filling the same potassium nitrate solution in a first toughening furnace, a second toughening furnace and a strengthening furnace;
the temperatures of the first toughening furnace, the second toughening furnace and the strengthening furnace are all kept at 420 ℃ in 410-;
putting a plurality of glass products into a preheating furnace, preheating the glass products in the preheating furnace for 1.5H, and heating the glass products from the furnace temperature of 80 ℃ to 380 ℃;
then taking out the glass product through the hoisting device, respectively putting the glass product into a first toughening furnace and a second toughening furnace, and soaking the glass product in a potassium nitrate solution at the temperature of 410-420 ℃ for 5.5-6 hours for toughening;
taking the glass product out of the first toughening furnace and the second toughening furnace through the hoisting device, putting the glass product into a strengthening furnace, and soaking the glass product in a potassium nitrate solution at the temperature of 410-420 ℃ for 30-35 minutes;
and taking the glass product out of the strengthening furnace, putting the glass product into an annealing furnace for annealing and cooling to finish the strengthening of the glass product.
2. A method for strengthening a strong glass according to claim 1, wherein said glass product is placed in said strengthening furnace within 3 to 5 minutes after being taken out from said first tempering furnace and said second tempering furnace.
3. The method of claim 2, wherein the temperature of the glass product when removed from the first tempering furnace and the second tempering furnace is between 410 ℃ and 420 ℃, and the temperature of the glass product when placed in the tempering furnace is greater than 390 ℃.
4. The method according to claim 3, wherein the first tempering furnace, the second tempering furnace, and the strengthening furnace are filled with 1.5 ton of potassium nitrate solution, and a predetermined amount of glass products are put in the furnaces at one time.
5. The method of claim 4, wherein the first and second toughening furnaces temper 3 batches of glass products in the same time period, and the tempering furnace tempers 6 batches of glass products in the same time period.
6. The method for strengthening strong glass according to claim 5, wherein the potassium nitrate solutions in the first tempering furnace and the second tempering furnace are used for 29 days to respectively process 87 batches of glass products, and then the potassium nitrate solution needs to be replaced; after the potassium nitrate solution in the strengthening furnace was used for 21 days, the strengthening furnace was changed to a toughening furnace for use, or the potassium nitrate solution in the strengthening furnace was replaced.
7. The method of claim 6, wherein the first and second toughening furnaces temper for 6 hours; the strengthening time of the strengthening furnace is 0.5 hour.
8. The method of claim 7, wherein after the glass product is secondarily strengthened in the first and second toughening furnaces, the stress intensity CS of the glass product is always over 760mpa, and the stress depth DOL is not less than 40 μm, so as to ensure that the product is always in the optimal parameter state.
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| CN202110694718.5A CN113213776A (en) | 2021-06-22 | 2021-06-22 | Strengthening method for strong glass |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100914628B1 (en) * | 2009-06-23 | 2009-09-02 | (주)한소닉에이스 | Apparatus for manufacturing tempered glass |
| CN206635215U (en) * | 2017-02-24 | 2017-11-14 | 夏献民 | Multiple-grooved chemical glass annealing furnace |
| CN110981220A (en) * | 2019-12-30 | 2020-04-10 | 北海市龙浩光电科技有限公司 | Chemical toughening method for glass |
-
2021
- 2021-06-22 CN CN202110694718.5A patent/CN113213776A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100914628B1 (en) * | 2009-06-23 | 2009-09-02 | (주)한소닉에이스 | Apparatus for manufacturing tempered glass |
| CN206635215U (en) * | 2017-02-24 | 2017-11-14 | 夏献民 | Multiple-grooved chemical glass annealing furnace |
| CN110981220A (en) * | 2019-12-30 | 2020-04-10 | 北海市龙浩光电科技有限公司 | Chemical toughening method for glass |
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