How to identify tempered glass has been homogenized

Abstract

The present invention discloses a method for identifying whether tempered glass has been homogenized, and belongs to the field of glass quality safety evaluation. The method comprises: applying a sintered temperature-indicating coating to the surface of the tempered glass according to a predetermined pattern; the sintered temperature-indicating coating comprises glass powder and a temperature-indicating material, the softening temperature of the glass powder is lower than the homogenization insulation temperature, the melting point is higher than the homogenization maximum temperature, and the temperature-indicating material irreversibly changes to a first specific color when the homogenization insulation temperature of the tempered glass is reached; the tempered glass is placed in a homogenizing furnace for homogenization treatment; if the color of the predetermined pattern after homogenization is the first specific color, and the shape of the predetermined pattern is not deformed, and the glass powder in the predetermined pattern shows a softening history, and the bonding strength between the predetermined pattern and the tempered glass reaches the set strength, then it is judged that the tempered glass has been homogenized as required. The present invention can simply record the historical process of the tempered glass being affected by temperature in the homogenizing furnace, and conveniently identify whether the tempered glass has been homogenized.

Description

Technical Field

[0001] The invention relates to the field of glass quality safety evaluation, in particular to a method for identifying whether tempered glass is homogenized. Background Art

[0002] Tempered glass has been widely used in various fields such as construction and automobiles in my country. my country is the country with the largest production and application of tempered glass. With the current glass production technology, the self-explosion of tempered glass cannot be completely eliminated. Its self-explosion rate after leaving the factory is about 0.1% to 1%. For tempered glass installed on high-rise buildings, the fragments produced by its self-explosion will fall from high altitude and pose serious safety hazards to people and objects on the ground. Therefore, reducing the self-explosion rate of tempered glass is one of the most concerned and urgent issues in the glass field.

[0003] According to the existing technology, homogenizing tempered glass is an effective way to reduce the self-explosion rate of tempered glass. "Safety Glass for Buildings Part 4: Homogenized Tempered Glass" (GB 15763.4-2009) stipulates that the homogenization process includes a heating stage, a heat preservation stage, and a cooling stage. The heating stage starts at the ambient temperature of all the glass and ends when the surface temperature of the last piece of glass reaches 280°C. The heat preservation stage starts when the surface temperature of all the glass reaches 280°C, and the heat preservation time is at least 2 hours. During the entire heat preservation stage, it should be ensured that the temperature of the glass surface is maintained at 290°C (homogenization heat preservation temperature), and the glass surface temperature during the entire homogenization stage should not exceed 320°C (maximum homogenization temperature). When the glass that finally reaches 280°C completes 2 hours of heat preservation, it begins to enter the cooling stage, during which the glass temperature drops below 70°C, and the homogenization process ends. Through the above technical treatment, tempered glass with a higher risk of self-explosion will explode in the homogenization furnace, thereby reducing its self-explosion rate to below 0.1%. Europe also has a standard that sets the homogenization temperature of tempered glass at 260°C during the insulation stage. my country's relevant laws and regulations will also require that tempered glass used in some fields must be homogenized.

[0004] However, since the appearance and properties of tempered glass do not change significantly before and after homogenization, it is difficult for people to identify whether the tempered glass entering the market has been homogenized. As a result, many glass companies engage in fraud and apply unhomogenized tempered glass to the market as homogenized tempered glass. This unhomogenized tempered glass still has a high self-explosion rate, causing great losses to users and posing a huge threat to urban public safety.

[0005] Chinese patent document CN111626384A discloses a method for intelligently detecting whether tempered glass is homogeneous, which is to make a tiny hole in the corner or edge of the original glass sheet, and after the original glass sheet is tempered; a chip with pre-entered information or a recognizable QR code is placed in the hole, and the gap between the chip or QR code and the hole is filled with low-melting-point glass slurry, and the chip or QR code is completely covered; the tempered glass with the chip or QR code and low-melting-point glass slurry placed in the hole is put into a homogenizing furnace for homogenization, and the low-melting-point glass melts and cools and solidifies during the homogenization process; the chip or QR code is firmly implanted into the tempered glass. After the tempered glass is taken out of the furnace, a signal reading device can be used to read the chip or scan the QR code content to detect and identify whether the tempered glass is homogeneous, or to trace the source of the homogenized tempered glass.

[0006] The above method has the following defects: first, the operation procedure is complicated, and holes need to be drilled in the glass, and the drilling itself has an adverse effect on the appearance and strength of the glass; second, the high-temperature resistant chips used are expensive, difficult to prepare, and large in size, making it difficult to achieve large-scale application; third, it is difficult to identify whether the tempered glass is homogenized under the specified temperature homogenization process curve. Summary of the invention

[0007] In order to solve the above technical problems, the present invention provides a method for identifying whether tempered glass has been homogenized, which can simply record the historical process of the tempered glass being affected by temperature in the homogenizing furnace, and conveniently identify whether the tempered glass has been homogenized. It does not require drilling, is simple to manufacture, and is low in price.

[0008] The present invention provides the following technical solutions:

[0009] A method for identifying whether tempered glass is homogenized, the method comprising:

[0010] S11: applying the prepared sintered temperature indicating coating onto the surface of the tempered glass according to a predetermined pattern;

[0011] The sintered temperature-indicating coating comprises glass powder and a temperature-indicating material, the softening temperature of the glass powder is lower than the homogenous heat preservation temperature of the tempered glass, the melting point of the glass powder is higher than the homogenous maximum temperature of the tempered glass, and the temperature-indicating material irreversibly changes to a first specific color when the homogenous heat preservation temperature of the tempered glass is reached;

[0012] S12: placing the tempered glass with the predetermined pattern into a homogenizing furnace for homogenization treatment;

[0013] S13: After the homogenization treatment is completed, the shape, color, softening history state and bonding strength between the predetermined pattern and the tempered glass are checked;

[0014] If the color of the predetermined pattern is the first specific color, the shape of the predetermined pattern is not deformed, the glass powder in the predetermined pattern shows a softening history, and the bonding strength between the predetermined pattern and the tempered glass reaches a set strength, it is determined that the tempered glass has been homogenized as required.

[0015] Furthermore, the sintering temperature indicating paint also includes auxiliary materials, which include solvents and additives, and the organic matter in the auxiliary materials can be completely volatilized after homogenization.

[0016] Furthermore, the homogenization and heat preservation temperature is 260°C, the softening temperature of the glass powder is 200-250°C, and the melting point is 340-360°C;

[0017] Alternatively, the homogenization insulation temperature is 290°C, the softening temperature of the glass powder is 220-280°C, and the melting point is 360-380°C.

[0018] Furthermore, the temperature indicating material displays a second specific color when the temperature is lower than the minimum homogenization temperature limit value; the temperature indicating material irreversibly changes from the second specific color to the first specific color when the homogenization insulation temperature of the tempered glass is reached; and the temperature indicating material irreversibly changes from the first specific color to the third specific color when the homogenization maximum temperature of the tempered glass is exceeded.

[0019] Further, if the predetermined pattern shows a glass phase, it is determined that the glass powder in the predetermined pattern shows a softening history.

[0020] A method for identifying whether tempered glass is homogenized, the method comprising:

[0021] S21: applying the prepared temperature indicating paint to the surface of the tempered glass according to a first predetermined pattern;

[0022] Wherein, the temperature indicating paint comprises a temperature indicating material, and the temperature indicating material irreversibly changes into a first specific color when the homogenization insulation temperature of the tempered glass is reached;

[0023] S22: applying the prepared sintering coating to the surface of the tempered glass according to a second predetermined pattern, and ensuring that the sintering coating completely or partially covers the temperature indicating coating;

[0024] Wherein, the sintering coating comprises glass powder, the softening temperature of the glass powder is lower than the homogenization insulation temperature of the tempered glass, and the melting point of the glass powder is higher than the homogenization maximum temperature of the tempered glass;

[0025] S23: placing the tempered glass with the first predetermined pattern and the second predetermined pattern into a homogenizing furnace for homogenization treatment;

[0026] S24: After the homogenization treatment is completed, the color of the first predetermined pattern is checked, and the shape, softening history state, and bonding strength between the second predetermined pattern and the tempered glass are checked;

[0027] If the color of the first predetermined pattern is the first specific color, and the shape of the second predetermined pattern is not deformed, and the glass powder in the second predetermined pattern shows a softening history, and the bonding strength between the second predetermined pattern and the tempered glass reaches a set strength, it is determined that the tempered glass has been homogenized as required.

[0028] Furthermore, the sintering coating and the temperature indicating coating both include auxiliary materials, the auxiliary materials include solvents and additives, and the organic matter in the auxiliary materials can be completely volatilized after homogenization treatment.

[0029] Furthermore, the homogenization and heat preservation temperature is 260°C, the softening temperature of the glass powder is 200-250°C, and the melting point is 340-360°C;

[0030] Alternatively, the homogenization insulation temperature is 290°C, the softening temperature of the glass powder is 220-280°C, and the melting point is 360-380°C.

[0031] Furthermore, the temperature indicating material displays a second specific color when the temperature is lower than the minimum homogenization temperature limit value; the temperature indicating material irreversibly changes from the second specific color to the first specific color when the homogenization insulation temperature of the tempered glass is reached; and the temperature indicating material irreversibly changes from the first specific color to the third specific color when the homogenization maximum temperature of the tempered glass is exceeded.

[0032] Further, if the second predetermined pattern shows a glass phase, it is determined that the glass powder in the second predetermined pattern shows a softening history.

[0033] The present invention has the following beneficial effects:

[0034] The present invention prepares a sintered temperature-indicating coating by using glass powder with a specific softening temperature and melting point and a temperature-discoloring material with a specific temperature. The sintered temperature-indicating coating is simply applied to the surface of the tempered glass and then homogenized. The sintered temperature-indicating coating is sintered on the surface of the tempered glass after heat treatment during the homogenization process and presents a specific color. The historical process of the tempered glass being affected by temperature in the homogenizing furnace can be easily recorded to verify whether the tempered glass has been homogenized. Since the sintered temperature-indicating coating is simple to prepare and convenient to apply to the surface of the tempered glass, and a mark can be applied to each piece of glass. During the subsequent use of the tempered glass, if the user of the tempered glass doubts whether a piece of tempered glass or a batch of tempered glass has been homogenized, the user only needs to perform relevant appearance and property changes on the applied predetermined pattern according to the method provided by the present invention to identify whether the tempered glass has been homogenized. Through this method, each piece of homogenized tempered glass can be identified, and unhomogenized tempered glass is prevented from entering the market, thereby ensuring the safe application of tempered glass. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic diagram of applying the sintered temperature-indicating coating to the surface of the tempered glass according to a predetermined pattern;

[0036] Figure 2 It is a schematic diagram showing that the temperature-indicating paint is applied to the surface of the tempered glass according to a first predetermined pattern, and the sintering paint is applied to the surface of the tempered glass according to a second predetermined pattern. DETAILED DESCRIPTION

[0037] In order to make the technical problems, technical solutions and advantages to be solved by the present invention more clear, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.

[0038] Embodiment 1:

[0039] An embodiment of the present invention provides a method for identifying whether tempered glass is homogenized, the method comprising:

[0040] S11: Apply the prepared sintered temperature indicating paint to the surface of the tempered glass 1 according to the predetermined pattern 2. Figure 1 shown.

[0041] The sintered temperature indicating coating includes glass powder and temperature indicating material, and may include auxiliary materials if necessary. The glass powder may be selected as low melting point glass powder, and its softening temperature and melting point shall be selected according to the homogenization insulation temperature and the highest homogenization temperature of the tempered glass. The softening temperature of the glass powder is required to be lower than the homogenization insulation temperature of the tempered glass (and closer to the homogenization insulation temperature), and the melting point of the glass powder is required to be higher than the highest homogenization temperature of the tempered glass. It is ensured that the glass powder can soften during the homogenization process, but cannot be completely melted.

[0042] At present, the current international and domestic standards include a homogenous insulation temperature of 260°C for 2 hours and a homogenous insulation temperature of 290°C for 2 hours. For the standard of homogenous insulation temperature of 260°C, the softening temperature of the glass powder can be selected as 200-250°C, and the melting point can be selected as 340-360°C. For the standard of homogenous insulation temperature of 290°C, the softening temperature of the glass powder can be selected as 220-280°C, and the melting point can be selected as 360-380°C. Low-melting-point glass powder can soften and produce a glass phase (but not completely melted) at a given homogenous insulation temperature and insulation time, and after cooling, it is well bonded to the surface of the tempered glass 1 in a sintered form (the standard is that it should not fall off during the further processing of the tempered glass after homogenization).

[0043] The temperature indicating material generally adopts irreversible temperature indicating powder, which can change into different colors under different temperature ranges, and the change is irreversible, and its function is to record the temperature change in the homogenization process according to its color change. In the present invention, it is required that the temperature indicating material irreversibly changes into a first specific color when the homogenization and heat preservation temperature of the tempered glass is reached, and whether the temperature in the homogenization process reaches the required homogenization and heat preservation temperature can be identified according to the color change of the temperature indicating material.

[0044] Furthermore, the temperature indicating material can also have more color change characteristics. For example, the temperature indicating material can display a second specific color when it is less than the minimum homogenization temperature limit. When the temperature indicating material reaches the homogenization insulation temperature of the tempered glass, it irreversibly changes from the second specific color to the first specific color. When the temperature indicating material exceeds the maximum homogenization temperature of the tempered glass, it irreversibly changes from the first specific color to the third specific color. In this way, the color temperature change points of the temperature indicating material should cover the maximum and minimum temperature limits of the homogenization temperature of the tempered glass, and the highest or lowest homogenization temperature history during the homogenization process can be identified based on the color change of the temperature indicating material. To ensure accuracy, it can be required that the maximum deviation of the temperature indicating temperature of the temperature indicating material should not exceed plus or minus 50°C.

[0045] The function of the auxiliary material is to prepare the glass powder into a coating that is easy to apply or print on the surface of the tempered glass 1. The auxiliary material generally includes a solvent and an auxiliary agent to improve the performance of the coating.

[0046] When preparing the sintering temperature-indicating coating, glass powder, auxiliary materials, and temperature-indicating materials are combined together to prepare a sintering temperature-indicating coating of tempered glass that can indicate temperature and can be sintered and has been homogenized. During preparation, it is required to reasonably design the composition and proportion of the auxiliary materials so that the prepared coating has good viscosity, fluidity, stability, and coatability or printability, and after sintering in the homogenizing furnace, the organic matter in the auxiliary materials can be completely volatilized. The added temperature-indicating material can produce a first specific color change in the coating formed after sintering at the set homogenizing insulation temperature, which is convenient for temperature identification during the homogenization process.

[0047] After the sintering temperature indicating paint is prepared, it is applied to the surface of the tempered glass 1 according to a predetermined pattern 2. The coated surface can be the surface where the end face of the tempered glass 1 is located, or it can be a surface perpendicular to the end face. The coating position is preferably at the corner of the surface. The coating method can be direct coating, or brushing, screen printing, spraying or stamping. After coating, a predetermined pattern 2 can be formed, such as various patterns or special LOGO forms, and the pattern will not be deformed after sintering and is easy to identify with the naked eye.

[0048] S12: putting the tempered glass 1 with the predetermined pattern 2 into a homogenizing furnace for homogenization.

[0049] This step is used to place the tempered glass 1 coated with the sintered temperature indicating paint into a homogenizing furnace for homogenization. During the homogenization process, the glass powder softens and sinters on the surface of the tempered glass 1. The temperature indicating material changes into a first specific color after reaching the homogenization and insulation temperature of the tempered glass, so that a predetermined pattern 2 of the first specific color visible to the naked eye is formed on the surface of the tempered glass 1, and the predetermined pattern 2 is solidified on the surface of the tempered glass 1.

[0050] S13: After the homogenization treatment is completed, the shape, color, softening history state and bonding strength between the predetermined pattern 2 and the tempered glass 1 are checked.

[0051] If the color of the predetermined pattern 2 is the first specific color, the shape of the predetermined pattern 2 is not deformed, the glass powder in the predetermined pattern 2 shows a softening history, and the bonding strength between the predetermined pattern 2 and the tempered glass 1 reaches the set strength, it is determined that the tempered glass 1 has been homogenized as required.

[0052] The specific implementation process of this step can be as follows:

[0053] First, check the color of the predetermined pattern solidified on the surface of the tempered glass 1. If the color change of the predetermined pattern 2 corresponds to the homogenization insulation temperature given by the tempered glass homogenization standard on the temperature indicating material (that is, the color change of the predetermined pattern 2 is the first specific color), it can be determined that the actual homogenization insulation temperature of the tempered glass is basically consistent with the temperature required by the standard. Otherwise, it can be determined that the actual homogenization insulation temperature does not match the temperature required by the standard or the tempered glass 1 has not been homogenized.

[0054] Subsequently, for the tempered glass whose actual homogenization and heat preservation temperature is determined to be substantially consistent with the temperature required by the standard, the shape of the predetermined pattern 2 after sintering, the softening history and other apparent states are checked.

[0055] If the shape of the predetermined pattern 2 is not deformed, and the predetermined pattern 2 can show an obvious softening history of the glass powder, it means that the glass powder has softened but not completely melted (the glass has a certain fluidity after being completely melted, and the predetermined pattern 2 will be deformed), indicating that the homogenization temperature has reached the softening temperature of the glass powder, but has not exceeded the melting point of the glass powder, that is, it can be determined that the actual homogenization insulation temperature of the tempered glass has reached the requirement. When judging whether there is a softening history, it can be judged by whether a glass phase appears. If the predetermined pattern 2 shows an obvious glass phase, it is judged that the glass powder in the predetermined pattern 2 shows a softening history.

[0056] If the bonding strength between the predetermined pattern 2 and the tempered glass 1 reaches the set strength, it can be considered that the insulation time has met the requirement.

[0057] If all the above conditions are met, it can be judged that the tempered glass has been homogenized as required and has achieved the ideal homogenization effect, otherwise it has not achieved the ideal homogenization effect.

[0058] The present invention prepares a sintered temperature-indicating coating by glass powder with a specific softening temperature and melting point and a temperature-discoloring material with a specific temperature. The sintered temperature-indicating coating is simply applied to the surface of the tempered glass 1 and then homogenized. The sintered temperature-indicating coating is sintered on the surface of the tempered glass 1 after heat treatment during the homogenization process and presents a specific color. The historical process of the tempered glass being subjected to temperature in the homogenizing furnace can be easily recorded to verify whether the tempered glass has been homogenized. Since the sintered temperature-indicating coating itself is simple to prepare and convenient to apply to the surface of the tempered glass 1, and a mark can be applied on each piece of glass. During the subsequent use of the tempered glass, if the user of the tempered glass doubts whether a piece of tempered glass or a batch of tempered glass has been homogenized, it is only necessary to perform relevant appearance and property changes on the applied predetermined pattern according to the method provided by the present invention to identify whether the tempered glass has been homogenized. Through this method, each piece of homogenized tempered glass can be identified, and unhomogenized tempered glass is prevented from entering the market, thereby ensuring the safe application of tempered glass.

[0059] To demonstrate the effect of the present invention, glass powder with a melting point of 350° and a softening point of about 220°C was selected and mixed with auxiliary materials such as mineral spirits to form a viscous paste. The SC370 temperature indicating material produced by Shijiazhuang Nalun Chemical Technology Co., Ltd. was added to the viscous paste to prepare a sintered temperature indicating coating. The temperature indicating material remained green and unchanged below 200°C, changed from green to blue within the range of 200-315°C, and turned white at temperatures exceeding 315°C.

[0060] The sintered temperature-indicating paint prepared above was screen-printed into a predetermined LOGO pattern on the surface of the tempered glass, and was put into a homogenizing furnace with the tempered glass for heat treatment. The heat treatment insulation temperature was 260°C and the insulation time was 2 hours. After homogenization, the LOGO appearance was checked and it was found that its shape was not deformed, the color was blue, and the glass powder produced a glass phase and solidified on the glass surface. The above experiments show that after homogenization, the state changes of the sintered temperature-indicating paint are in line with expectations, indicating that the sintered temperature-indicating paint is reliable and effective in identifying that the tempered glass has been homogenized.

[0061] Embodiment 2:

[0062] An embodiment of the present invention provides a method for identifying whether tempered glass is homogenized, the method comprising:

[0063] S21: Apply the prepared temperature indicating paint to the surface of the tempered glass 1 according to the first predetermined pattern 3. Figure 2 shown.

[0064] The temperature indicating paint comprises a temperature indicating material, and the temperature indicating material irreversibly changes into a first specific color when the homogenization insulation temperature of the tempered glass is reached.

[0065] S22: Apply the prepared sintering paint to the surface of the tempered glass 1 according to the second predetermined pattern 4, and ensure that the sintering paint completely or partially covers the temperature indicating paint, such as Figure 2 shown.

[0066] The sintering coating comprises glass powder, the softening temperature of the glass powder is lower than the homogenous insulation temperature of the tempered glass, and the melting point of the glass powder is higher than the homogenous maximum temperature of the tempered glass.

[0067] The difference between this embodiment and embodiment 1 is that in embodiment 1, glass powder, temperature indicating material and auxiliary materials (if any) are prepared together into a sintered temperature indicating coating, which is applied to the surface of the tempered glass 1; while in this embodiment, the temperature indicating material and auxiliary materials (if any) are prepared into a temperature indicating coating, the glass powder and auxiliary materials (if any) are prepared into a sintered coating, and the temperature indicating coating and the sintered coating are respectively applied to the surface of the tempered glass 1.

[0068] Similar to Example 1, when the homogenous insulation temperature is 260°C, the softening temperature of the glass powder can be selected as 200-250°C, and the melting point can be selected as 340-360°C; when the homogenous insulation temperature is 290°C, the softening temperature of the glass powder can be selected as 220-280°C, and the melting point can be selected as 360-380°C.

[0069] If necessary, the sintering coating and the temperature indicating coating may further include auxiliary materials. Similar to Example 1, the auxiliary materials include solvents and additives, and the organic matter in the auxiliary materials can be completely volatilized after homogenization.

[0070] For other properties of the glass powder, temperature indicating material and auxiliary materials, please refer to the description of Example 1 and will not be repeated in this example.

[0071] During coating, the coating method of the temperature-indicating coating and the sintering coating is also similar to that of Example 1, and will not be described in detail in this example. However, this example requires that the sintering coating completely or partially covers the temperature-indicating coating to ensure that when the sintering coating is softened and solidified with the tempered glass 1, the temperature-indicating material is solidified to the tempered glass 1 together to prevent the temperature-indicating material from falling off later.

[0072] Furthermore, during coating, the first predetermined pattern 3 and the second predetermined pattern 4 may be the same or different, and may be flexibly selected according to actual needs.

[0073] S23: putting the tempered glass 1 with the first predetermined pattern 3 and the second predetermined pattern 4 into a homogenizing furnace for homogenization treatment.

[0074] This step is similar to S12 in Example 1 and will not be described in detail in this embodiment.

[0075] S24: After the homogenization treatment is completed, the color of the first predetermined pattern 3 is checked, and the shape, softening history state, and bonding strength between the second predetermined pattern 4 and the tempered glass 1 are checked.

[0076] If the color of the first predetermined pattern 3 is the first specific color, the shape of the second predetermined pattern 4 is not deformed, the glass powder in the second predetermined pattern 4 shows a softening history, and the bonding strength between the second predetermined pattern 4 and the tempered glass 1 reaches the set strength, it is determined that the tempered glass has been homogenized as required.

[0077] The difference between this step and S13 of Example 1 is that: Example 1 checks the shape, color, softening history and bonding strength between the same predetermined pattern and the tempered glass 1, while this embodiment checks the color of the first predetermined pattern 3, the shape, softening history and bonding strength between the second predetermined pattern 4 and the tempered glass 1. Other details of this step are the same as those of Example 1 and will not be repeated in this embodiment.

[0078] The present invention prepares a temperature-indicating coating by using a temperature-indicating material that changes color at a specific temperature, and prepares a sintering coating by using glass powder with a specific softening temperature and melting point. The temperature-indicating coating and the sintering coating are simply applied to the surface of the tempered glass and then homogenized. The sintering coating and the temperature-indicating coating are sintered on the surface of the tempered glass after heat treatment during the homogenization process and present a specific color. The historical process of the tempered glass being subjected to the temperature in the homogenizing furnace can be easily recorded to verify whether the tempered glass has been homogenized. Since the sintering coating and the temperature-indicating coating are simple to prepare and convenient to apply to the surface of the tempered glass, and each piece of glass can be marked. During the subsequent use of the tempered glass, if the user of the tempered glass doubts whether a piece of tempered glass or a batch of tempered glass has been homogenized, the user only needs to perform relevant appearance and property changes on the applied pattern according to the method provided by the present invention to identify whether the tempered glass has been homogenized. Through this method, each piece of homogenized tempered glass can be identified, and unhomogenized tempered glass is prevented from entering the market, thereby ensuring the safe application of tempered glass.

[0079] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for identifying whether tempered glass is homogenized, characterized in that: The method comprises: S11: applying the prepared sintered temperature indicating coating onto the surface of the tempered glass according to a predetermined pattern; The sintered temperature-indicating coating comprises glass powder and a temperature-indicating material, the softening temperature of the glass powder is lower than the homogenous heat preservation temperature of the tempered glass, the melting point of the glass powder is higher than the homogenous maximum temperature of the tempered glass, and the temperature-indicating material irreversibly changes to a first specific color when the homogenous heat preservation temperature of the tempered glass is reached; S12: placing the tempered glass with the predetermined pattern into a homogenizing furnace for homogenization treatment; S13: After the homogenization treatment is completed, the shape, color, softening history state and bonding strength between the predetermined pattern and the tempered glass are checked; If the color of the predetermined pattern is the first specific color, the shape of the predetermined pattern is not deformed, the glass powder in the predetermined pattern shows a softening history, and the bonding strength between the predetermined pattern and the tempered glass reaches a set strength, then it is determined that the tempered glass has been homogenized as required; The temperature indicating material displays a second specific color when the temperature is lower than the minimum homogenization temperature limit value. When the temperature indicating material reaches the homogenization temperature of the tempered glass, the second specific color irreversibly changes to the first specific color. When the temperature indicating material exceeds the maximum homogenization temperature of the tempered glass, the first specific color irreversibly changes to the third specific color. The sintering temperature indicating paint also includes auxiliary materials, which include solvents and additives, and the organic matter in the auxiliary materials can be completely volatilized after homogenization treatment; The homogenization and heat preservation temperature is 260°C, the softening temperature of the glass powder is 200-250°C, and the melting point is 340-360°C; Alternatively, the homogenization and heat preservation temperature is 290°C, the softening temperature of the glass powder is 220-280°C, and the melting point is 360-380°C; If the predetermined pattern shows a glass phase, it is determined that the glass powder in the predetermined pattern shows a softening history.

2. A method for identifying whether tempered glass is homogenized, characterized in that: The method comprises: S21: applying the prepared temperature indicating paint to the surface of the tempered glass according to a first predetermined pattern; Wherein, the temperature indicating paint comprises a temperature indicating material, and the temperature indicating material irreversibly changes into a first specific color when the homogenization insulation temperature of the tempered glass is reached; S22: applying the prepared sintering coating to the surface of the tempered glass according to a second predetermined pattern, and ensuring that the sintering coating completely or partially covers the temperature indicating coating; Wherein, the sintering coating comprises glass powder, the softening temperature of the glass powder is lower than the homogenization insulation temperature of the tempered glass, and the melting point of the glass powder is higher than the homogenization maximum temperature of the tempered glass; S23: placing the tempered glass with the first predetermined pattern and the second predetermined pattern into a homogenizing furnace for homogenization treatment; S24: After the homogenization treatment is completed, the color of the first predetermined pattern is checked, and the shape, softening history state, and bonding strength between the second predetermined pattern and the tempered glass are checked; If the color of the first predetermined pattern is the first specific color, and the shape of the second predetermined pattern is not deformed, and the glass powder in the second predetermined pattern shows a softening history, and the bonding strength between the second predetermined pattern and the tempered glass reaches a set strength, then it is determined that the tempered glass has been homogenized as required; The temperature indicating material displays a second specific color when the temperature is lower than the minimum homogenization temperature limit value. When the temperature indicating material reaches the homogenization temperature of the tempered glass, the second specific color irreversibly changes to the first specific color. When the temperature indicating material exceeds the maximum homogenization temperature of the tempered glass, the first specific color irreversibly changes to the third specific color. The sintering coating and the temperature indicating coating both further include auxiliary materials, the auxiliary materials include solvents and additives, and the organic matter in the auxiliary materials can be completely volatilized after homogenization treatment; The homogenization and heat preservation temperature is 260°C, the softening temperature of the glass powder is 200-250°C, and the melting point is 340-360°C; Alternatively, the homogenization and heat preservation temperature is 290°C, the softening temperature of the glass powder is 220-280°C, and the melting point is 360-380°C; If the second predetermined pattern shows a glass phase, it is determined that the glass powder in the second predetermined pattern shows a softening history.

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