CN112408760A - Curved glass hot bending treatment process - Google Patents
Curved glass hot bending treatment process Download PDFInfo
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- CN112408760A CN112408760A CN202011389299.6A CN202011389299A CN112408760A CN 112408760 A CN112408760 A CN 112408760A CN 202011389299 A CN202011389299 A CN 202011389299A CN 112408760 A CN112408760 A CN 112408760A
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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
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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
- C03B23/03—Re-forming glass sheets by bending by press-bending between shaping moulds
-
- 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
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
The invention discloses a curved glass hot bending treatment process, which comprises the following steps: s1 cutting and edging: cutting edges of glass to be thermally bent according to a certain specification, performing edge grinding treatment by using a special glass grinding machine, cleaning S2, and feeding into a furnace; cleaning and airing the surface of the hot-bent glass in the step S1 by using clear water, then uniformly attaching a layer of water-soluble film or water-soluble protective ink on the outer surface of the glass to be hot-bent, then putting the glass into a hot-bent mould, and firing S3: low-temperature heating: and opening the low-temperature control section of the hot bending furnace, then quickly placing the glass to be hot bent into the low-temperature control section of the hot bending furnace, and quickly closing the furnace door. According to the curved glass hot bending treatment process, the time for the optimal temperature rise and fall of glass in each working procedure process of hot bending is conveniently explored by setting the time for low-temperature heating, medium-temperature heating, high-temperature heating, primary annealing and secondary annealing, so that the quality and the production efficiency of the hot bent glass are improved.
Description
Technical Field
The invention relates to the technical field of hot bending glass, in particular to a hot bending treatment process for curved glass.
Background
The hot bending glass is formed in a mold by heating and softening a plane glass. Then the curved glass is made by annealing. The hot bent glass can be made into glass with various radians. The hot bent glass can be used for occasions such as sightseeing elevators, lobby halls, rotating top floors, roof lighting, street crossing channels, sight windows and the like, and can also be used for tea tables, shower rooms, containers and the like of furniture.
In the process of hot bending and forming of hot bent glass, several important processes of low-temperature heating, medium-temperature heating, high-temperature hot bending plasticity, annealing and cooling are needed, in the process of hot bending, the temperature in a hot bending furnace needs to be continuously and uniformly increased and decreased, the control of the temperature increasing and decreasing time has important correlation on the quality of the formed glass, and if the temperature increasing and decreasing time is not accurately controlled, the formed glass is easy to crack, so that the quality and the production efficiency of the hot bent glass are influenced.
And because the air contains a certain amount of dust, the phenomenon that the dust is attached to the surface of the glass can occur in the process of carrying out hot bending on the glass by using the hot bending machine, and if the glass is not processed cleanly in time, the surface of the glass after the hot bending can have flaws, so that the overall quality of the glass is seriously influenced.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a curved glass hot bending treatment process.
In order to achieve the purpose, the invention adopts the following technical scheme:
a curved glass hot bending treatment process comprises the following steps:
s1 cutting and edging: and cutting edges of the glass to be thermally bent according to a certain specification, and performing edge grinding treatment by using a special glass grinding machine.
S2, cleaning and feeding into a furnace; and (5) cleaning and airing the surface of the hot-bent glass in the step S1 by using clear water, then uniformly attaching a layer of water-soluble film or water-soluble protective ink on the outer surface of the glass to be hot-bent, and then putting the glass into a hot-bent mould.
S3 firing: low-temperature heating: and (3) starting a low-temperature control section of the hot bending furnace, then quickly placing the glass to be bent into the low-temperature control section of the hot bending furnace, quickly closing a furnace door, and increasing the temperature of the glass in the low-temperature control section from normal temperature to 350 degrees within T1 time.
Medium-temperature heating: after the temperature of the glass in the low-temperature heating section is raised to 350 degrees, the glass is conveyed to the medium-temperature control section, and the temperature of the glass in the medium-temperature control section is raised from 350 degrees to 600 degrees within the time T2.
High-temperature heating: after the temperature of the glass in the medium-temperature heating section rises to 600 ℃, conveying the glass to the high-temperature heating section, and raising the temperature of the glass in the high-temperature control section from 600 ℃ to 800 ℃ within the time T3.
And (3) heat preservation: and after the temperature of the glass in the high-temperature heating section rises to 800 ℃, continuously maintaining the temperature of the high-temperature heating section for 20 minutes.
S4 annealing: primary annealing: after the glass heat preservation time in the step S3 is over, the glass is quickly conveyed to a primary annealing section, and the temperature of the glass is reduced from 800 degrees to 600 degrees in the T4 time.
Secondary annealing: after the temperature of the glass in the primary annealing section is reduced to 600 ℃, the glass is rapidly conveyed to the secondary annealing section, and the temperature of the glass is reduced from 600 ℃ to 350 ℃ in T5 time.
S5 natural cooling: and after the temperature of the glass in the secondary annealing section of the step S4 is reduced to 350 ℃, reducing the temperature of the glass from 350 ℃ to normal temperature within 50 minutes, and washing the surface of the glass with water to attach a layer of water-soluble film or water-soluble protective ink to obtain the hot bent glass.
S6 detection: and (4) detecting the formed hot bent glass, directly storing or assembling the hot bent glass into a finished product after the detection reaches the standard, and returning to the step S1 to carry out secondary firing if the detection does not reach the standard.
Preferably, the thickness of both the water-soluble film and the water-soluble protective ink is greater than or equal to 10 microns.
Preferably, the time of T1 is 25 minutes to 35 minutes, the time of T2 is 20 minutes to 30 minutes, and the time of T3 is 15 minutes to 25 minutes.
Preferably, the time of T4 is 35 minutes to 45 minutes, and the time of T5 is 25 minutes to 35 minutes.
The invention has the following beneficial effects:
1. according to the curved glass hot bending treatment process, the time for the optimal temperature rise and fall of glass in each working procedure process of hot bending is conveniently explored by setting the time for low-temperature heating, medium-temperature heating, high-temperature heating, primary annealing and secondary annealing, so that the quality and the production efficiency of the hot bent glass are improved.
2. According to the curved glass hot bending treatment process, a layer of water-soluble film or water-soluble protective ink is attached to the outer surface of glass before the hot bending process, so that dust can be prevented from being attached to the surface of the glass, and after the hot bending treatment is carried out, the water-soluble film or the water-soluble protective ink can be directly and quickly cleaned through water, so that the production quality of the glass is ensured.
Detailed Description
Example 1
A curved glass hot bending treatment process comprises the following steps:
s1 cutting and edging: cutting edges of glass to be thermally bent according to a certain specification, performing edge grinding treatment by using a special glass grinding machine, grinding a round chamfer with the radius of 1 cm at the edge,
and then uniformly attaching a layer of water-soluble film or water-soluble protective ink on the outer surface of the glass to be subjected to hot bending, wherein the thicknesses of the water-soluble film and the water-soluble protective ink are both more than or equal to 10 micrometers, and then putting the glass into a hot bending die.
S2, cleaning and feeding into a furnace; and (5) cleaning and airing the surface of the hot-bent glass in the step S1 by using clear water, then uniformly attaching a layer of water-soluble film or water-soluble protective ink on the outer surface of the glass to be hot-bent, wherein the thicknesses of the water-soluble film and the water-soluble protective ink are both more than or equal to 10 micrometers, and then putting the glass into a hot-bending mould.
S3 firing: low-temperature heating: and (3) opening the low-temperature control section of the hot bending furnace, quickly placing the glass to be hot bent into the low-temperature control section of the hot bending furnace, quickly closing a furnace door, and increasing the temperature of the glass in the low-temperature control section from normal temperature to 350 ℃ within the time T1, wherein the time T1 is 25-35 minutes.
Medium-temperature heating: after the temperature of the glass in the low-temperature heating section is increased to 350 ℃, the glass is conveyed to a medium-temperature control section, the temperature of the glass in the medium-temperature control section is increased from 350 ℃ to 600 ℃ within the time T2, and the time T2 is 20 minutes to 30 minutes.
High-temperature heating: after the temperature of the glass in the middle-temperature heating section is increased to 600 ℃, the glass is conveyed to the high-temperature heating section, the temperature of the glass in the high-temperature control section is increased from 600 ℃ to 800 ℃ within the time T3, and the time T3 is 15 minutes to 25 minutes.
And (3) heat preservation: and after the temperature of the glass in the high-temperature heating section rises to 800 ℃, continuously maintaining the temperature of the high-temperature heating section for 20 minutes.
S4 annealing: primary annealing: after the glass heat preservation time in the step S3 is over, the glass is quickly conveyed to a primary annealing section, the temperature of the glass is reduced from 800 degrees to 600 degrees in the T4 time, and the time of the T4 is 35 minutes to 45 minutes.
Secondary annealing: after the temperature of the glass in the primary annealing section is reduced to 600 ℃, the glass is rapidly conveyed to the secondary annealing section, the temperature of the glass is reduced from 600 ℃ to 350 ℃ within the time T5, and the time T5 is 25 minutes to 35 minutes.
S5 natural cooling: and after the temperature of the glass in the secondary annealing section of the step S4 is reduced to 350 ℃, reducing the temperature of the glass from 350 ℃ to normal temperature within 50 minutes, and washing the surface of the glass with water to attach a layer of water-soluble film or water-soluble protective ink to obtain the hot bent glass.
S6 detection: and (4) detecting the formed hot bent glass, directly storing or assembling the hot bent glass into a finished product after the detection reaches the standard, and returning to the step S1 to carry out secondary firing if the detection does not reach the standard.
By setting the time of low-temperature heating, medium-temperature heating, high-temperature heating, primary annealing and secondary annealing, the time of the optimal temperature rise and fall of the glass in the process of each hot bending procedure is conveniently explored, so that the quality and the production efficiency of the hot bent glass are improved.
In this embodiment, in the first step, under the condition that the time T1 is adjusted and the time T2, T3, T4 and T5 are not changed, the hot-bent glass finished product is sampled and detected according to the requirements and methods of the current industry standard JC/T915-2003, and the qualification rate is shown in table 1:
| T1 | 25 | 30 | 35 |
| percent pass (%) | 97 | 99 | 96 |
TABLE 1
Secondly, under the condition of adjusting the time T2 and keeping the time T1, the time T3, the time T4 and the time T5 unchanged, the hot-bent glass finished product is sampled and detected according to the requirements and methods of the current industry standard JC/T915-2003, and the qualification rate is shown in Table 2:
| T2 | 20 | 25 | 30 |
| percent pass (%) | 96 | 99 | 98 |
TABLE 2
Thirdly, under the condition of adjusting the time T3 and keeping the time T1, the time T2, the time T4 and the time T5 unchanged, the hot-bent glass finished product is sampled and detected according to the requirements and methods of the current industry standard JC/T915-2003, and the qualification rate is shown in Table 3:
| T3 | 15 | 20 | 25 |
| percent pass (%) | 94 | 98 | 96 |
TABLE 3
Fourthly, under the condition that the T4 time is adjusted and the T1, T2, T3 and T5 time is not changed, the hot-bent glass finished product is sampled and detected according to the requirements and the method of the current industry standard JC/T915-2003, and the qualification rate is shown in the table 4:
| T4 | 35 | 40 | 45 |
| percent pass (%) | 95 | 99 | 97 |
TABLE 4
And fifthly, under the condition that the T5 time is adjusted and the T1, T2, T3 and T4 time is not changed, the hot-bent glass finished product is sampled and detected according to the requirements and methods of the current industry standard JC/T915-2003, and the qualification rate is shown in Table 5:
| T5 | 25 | 30 | 35 |
| percent pass (%) | 97 | 99 | 96 |
TABLE 5
According to the detection results in tables 1 to 5, when the glass is subjected to the hot bending treatment, the time for low-temperature heating is controlled to be optimal within 30 minutes, the time for medium-temperature heating is controlled to be optimal within 25 minutes, the time for high-temperature heating is controlled to be optimal within 20 minutes, the time for primary annealing is controlled to be optimal within 40 minutes, the time for secondary annealing is controlled to be optimal within 30 minutes, and when the time for each process is controlled within a reasonable range, the yield of the hot-bent glass after production can be improved, and the quality and the production efficiency of the glass after hot bending can be ensured.
Example 2
Unlike example 1, in the first step, the glass was not subjected to any treatment in S1, and then the glass was subjected to hot bending for the optimum processing time in example 1, and after the hot bending was completed, the cleanliness of the glass surface was examined.
And a second step of uniformly attaching a water-soluble film to the surface of the glass in S1, then hot-bending the glass according to the optimal process time in example 1, washing the water-soluble film after the hot-bending is completed, and then testing the cleanliness of the glass surface.
Thirdly, a layer of water-soluble protective ink is uniformly adhered to the surface of the glass in the step S1, then the glass is subjected to hot bending according to the optimal process time in the example 1, the water-soluble protective ink is washed after the hot bending is completed, and then the cleanliness of the surface of the glass is detected, wherein the detection results are shown in table 6:
| untreated | Adhering water-soluble film | With water-soluble protective inks | |
| Cleanliness (%) | 95.6 | 98.4 | 99.1 |
TABLE 6
According to the detection results in table 6, it can be seen that, before the glass hot bending process, a layer of water-soluble film or water-soluble protective ink is attached to the surface of the glass, so that the cleanliness of the surface of the hot bent glass after forming can be improved, the overall quality of the hot bent glass after forming can be improved, and the generation of defective products can be reduced.
In the invention, in the process of hot bending the glass, the time of low-temperature heating is controlled to be 30 minutes, the time of medium-temperature heating is controlled to be 25 minutes, the time of high-temperature heating is controlled to be 20 minutes, the time of primary annealing is controlled to be 40 minutes, the time of secondary annealing is controlled to be 30 minutes, and the glass produced by hot bending can be kept at the best quality, thereby achieving the effect of improving the quality and the production efficiency of the hot-bent glass.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. The curved glass hot bending treatment process is characterized by comprising the following steps of: the method comprises the following steps:
s1 cutting and edging: cutting edges of glass to be thermally bent according to a certain specification, and performing edge grinding treatment by using a special glass grinding machine;
s2, cleaning and feeding into a furnace; cleaning and airing the surface of the hot-bent glass in the step S1 by using clear water, then uniformly attaching a layer of water-soluble film or water-soluble protective ink on the outer surface of the glass to be hot-bent, and then putting the glass into a hot-bent mould;
s3 firing: low-temperature heating: opening a low-temperature control section of the hot bending furnace, quickly placing glass to be hot bent into the low-temperature control section of the hot bending furnace, quickly closing a furnace door, and increasing the temperature of the glass in the low-temperature control section from normal temperature to 350 degrees within T1 time;
medium-temperature heating: after the temperature of the glass in the low-temperature heating section is raised to 350 ℃, conveying the glass to a medium-temperature control section, and raising the temperature of the glass in the medium-temperature control section from 350 ℃ to 600 ℃ within T2 time;
high-temperature heating: after the temperature of the glass in the medium-temperature heating section rises to 600 ℃, conveying the glass to the high-temperature heating section, and raising the temperature of the glass in the high-temperature control section from 600 ℃ to 800 ℃ within T3 time;
and (3) heat preservation: after the temperature of the glass in the high-temperature heating section rises to 800 ℃, continuously keeping the temperature of the high-temperature heating section for 20 minutes;
s4 annealing: primary annealing: after the heat preservation time of the glass in the step S3 is over, rapidly conveying the glass to a primary annealing section, and reducing the temperature of the glass from 800 degrees to 600 degrees within the time T4;
secondary annealing: after the temperature of the glass in the primary annealing section is reduced to 600 ℃, rapidly conveying the glass to the secondary annealing section, and reducing the temperature of the glass from 600 ℃ to 350 ℃ within T5 time;
s5 natural cooling: after the temperature of the glass in the secondary annealing section of the step S4 is reduced to 350 ℃, the temperature of the glass is reduced from 350 ℃ to normal temperature within 50 minutes, and a layer of water-soluble film or water-soluble protective ink is attached to the surface of the glass by water washing to obtain hot bent glass;
s6 detection: and (4) detecting the formed hot bent glass, directly storing or assembling the hot bent glass into a finished product after the detection reaches the standard, and returning to the step S1 to carry out secondary firing if the detection does not reach the standard.
2. The curved glass hot-bending treatment process according to claim 1, wherein: the thickness of the water-soluble film and the thickness of the water-soluble protective ink are both greater than or equal to 10 micrometers.
3. The curved glass hot-bending treatment process according to claim 1, wherein: the time of T1 is 25 minutes to 35 minutes, the time of T2 is 20 minutes to 30 minutes, and the time of T3 is 15 minutes to 25 minutes.
4. The curved glass hot-bending treatment process according to claim 1, wherein: the time of T4 is 35 to 45 minutes, and the time of T5 is 25 to 35 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011389299.6A CN112408760A (en) | 2020-12-02 | 2020-12-02 | Curved glass hot bending treatment process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011389299.6A CN112408760A (en) | 2020-12-02 | 2020-12-02 | Curved glass hot bending treatment process |
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| CN112408760A true CN112408760A (en) | 2021-02-26 |
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| CN202011389299.6A Withdrawn CN112408760A (en) | 2020-12-02 | 2020-12-02 | Curved glass hot bending treatment process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113772932A (en) * | 2021-09-16 | 2021-12-10 | 深圳利恩光学有限公司 | Special-shaped cutting glass cover plate, forming process and attaching method thereof |
-
2020
- 2020-12-02 CN CN202011389299.6A patent/CN112408760A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113772932A (en) * | 2021-09-16 | 2021-12-10 | 深圳利恩光学有限公司 | Special-shaped cutting glass cover plate, forming process and attaching method thereof |
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Application publication date: 20210226 |
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