B value control method for 3D hot bending forming of microcrystalline glass

Abstract

The invention relates to the technical field of glass hot bending forming, in particular to a B value control method for glass ceramic 3D hot bending forming, which comprises the following steps: selecting a plurality of low-crystallinity glass ceramics with the same volume and size, setting different or the same preset time for the plurality of low-crystallinity glass ceramics based on different temperature environments, and forming a B value of the glass ceramic 3D hot bending forming. Sequentially and repeatedly preheating the low-crystallinity microcrystalline glass at a high temperature, completing final hot bending forming, and testing the crystalline phase distribution proportion and the crystal particle size of the crystallinity of the hot-bending-formed microcrystalline glass and the optical B value and the haze of the hot-bending-formed microcrystalline glass. Based on high-temperature preheating and hot bending forming at different temperatures and different preset time, the optical B value and the haze of the glass ceramic after 3D hot bending forming are determined, and according to the requirements of the optical B value and the haze of the glass ceramic after 3D hot bending forming, the temperature and the preset time required by high-temperature preheating and hot bending forming can be deduced and found out; and the use requirements are met.

Description

Technical Field

[0001] The present invention relates to the technical field of glass hot bending, and more specifically, to a method for controlling the B value of microcrystalline glass 3D hot bending. Background Art

[0002] LAB value, also known as B value, is an important color control management system in the color system. It is a color space established based on the color perception characteristics of the human visual system. LAB values ​​represent three dimensions: L represents lightness; A represents the red-green axis; and B represents the yellow-blue axis.

[0003] Based on this, because microcrystalline glass has glass phases inside, that is, different crystal phases, such as lithium metasilicate Li2SIO3, lithium disilicate Li2SIO5, petalite LiAlSi4O10, etc., the crystal grain sizes and refractive indices of different crystal phases are different, which leads to different LAB values.

[0004] In the production process of hot-bending 3D curved glass-ceramics, it is usually necessary to undergo long-term high-temperature heating operations, which causes different proportions of different crystal phases inside the glass-ceramics. However, different crystal phases are affected differently by temperature, resulting in changes in grain size, which can easily cause changes in the turbidity inside the 3D curved glass-ceramics, causing differences in LAB values ​​and making it impossible to meet usage requirements. Summary of the invention

[0005] In view of the deficiencies of the above-mentioned prior art, the object of the present invention is to provide a method for controlling the B value of microcrystalline glass 3D hot bending forming, which has the advantages of determining the optical B value and haze of the microcrystalline glass after 3D hot bending forming based on high-temperature preheating and hot bending forming at different temperatures and different preset times to meet usage requirements.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: A method for controlling the B value of microcrystalline glass 3D hot bending forming, comprising the following steps:

[0007] S1: Select multiple low-crystallinity glass-ceramics of the same volume and size for experimental preparation;

[0008] S2: Conduct hot bending experiments on multiple low-crystallization glass-ceramics under different temperature environments;

[0009] S3: Preheating the low-crystallinity glass-ceramics at high temperatures for multiple times in sequence and completing the final hot bending forming within a preset time;

[0010] S4: Detect the crystal phase distribution ratio of the crystallinity and the crystal grain size of the hot-bent glass-ceramics;

[0011] S5: Test the optical B value and haze of glass-ceramics after hot bending;

[0012] Based on high-temperature preheating and hot bending at different temperatures and different preset times, the optical B value and haze of the microcrystalline glass after 3D hot bending are determined.

[0013] Preferably, the crystal phase distribution ratio of crystallinity and the crystal grain size are detected before and after the hot bending forming experiment for the low-crystallinity glass-ceramics; based on the comparison of the crystal phase distribution ratio detection data and the crystal grain size detection data before and after the hot bending forming experiment of the same low-crystallinity glass-ceramics, the data values ​​of high-temperature preheating and hot bending forming at different temperatures and different preset times under the low-crystallinity glass-ceramics are compared.

[0014] Preferably, the preset time is 80s-100s.

[0015] Preferably, the temperature range of the hot bending forming experiment is between 450 degrees Celsius and 780 degrees Celsius.

[0016] Preferably, the hot bending forming experiment is performed using a 3D hot bending forming machine.

[0017] Preferably, the crystal phase distribution ratio detection and particle size detection of the low-crystallinity glass-ceramics are performed by an XRD detection instrument.

[0018] Preferably, the optical B value and haze of the low-crystallinity glass-ceramics after hot bending are detected by using a spectrocolorimeter.

[0019] To sum up, the present invention has the beneficial effects of: preparing experiments for multiple low-crystallinity glass-ceramics of the same volume and size, and grouping them for hot bending experiments in sequence; placing multiple low-crystallinity glass-ceramics under different temperature environments and setting different or the same preset times; preheating the low-crystallinity glass-ceramics at high temperatures for multiple times in sequence and completing the final hot bending; testing the crystal phase distribution ratio and crystal particle size of the hot-bent glass-ceramics and the optical B value and haze of the glass-ceramics after hot bending; determining the optical B value and haze of the glass-ceramics after 3D hot bending through high-temperature preheating and hot bending at different temperatures and preset times; and according to the requirements for the optical B value and haze of the glass-ceramics after 3D hot bending, being able to infer and find out the temperature and preset time required for high-temperature preheating and hot bending, thereby meeting the use requirements. DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When a component is referred to as being "connected to" another component, it can be directly or indirectly connected to the other component.

[0022] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or positional relationship shown and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0024] A method for controlling the B value of glass-ceramics during 3D hot bending, comprising the following steps:

[0025] S1: Select multiple low-crystallinity glass-ceramics of the same volume and size for experimental preparation;

[0026] S2: Conduct hot bending experiments on multiple low-crystallization glass-ceramics under different temperature environments;

[0027] S3: Preheating the low-crystallinity glass-ceramics at high temperatures for multiple times in sequence and completing the final hot bending forming within a preset time;

[0028] S4: Detect the crystal phase distribution ratio of the crystallinity and the crystal grain size of the hot-bent glass-ceramics;

[0029] S5: Test the optical B value and haze of glass-ceramics after hot bending;

[0030] Based on high-temperature preheating and hot bending at different temperatures and different preset times, the optical B value and haze of the microcrystalline glass after 3D hot bending are determined.

[0031] In this embodiment, multiple low-crystallinity glass-ceramics of the same volume are prepared for experiment, and then grouped for hot bending experiments. Multiple low-crystallinity glass-ceramics are placed in different temperature environments and set with different or same preset times. The low-crystallinity glass-ceramics are preheated at high temperature for multiple times in sequence and finally hot-bending is completed. The crystal phase distribution ratio and crystal particle size of the hot-bent glass-ceramics and the optical B value and haze of the glass-ceramics after hot-bending are tested. The optical B value and haze of the glass-ceramics after 3D hot-bending are determined through high-temperature preheating and hot-bending at different temperatures and preset times. According to the requirements for the optical B value and haze of the glass-ceramics after 3D hot-bending, the temperature and preset time required for high-temperature preheating and hot-bending can be inferred and found, so as to meet the use requirements.

[0032] Specifically, the crystal phase distribution ratio of crystallinity and the crystal grain size are detected before and after the hot bending forming experiment for low crystallinity glass-ceramics; based on the comparison of the crystal phase distribution ratio detection data and the crystal grain size detection data before and after the hot bending forming experiment of the same low crystallinity glass-ceramics, the data values ​​of high-temperature preheating and hot bending forming at different temperatures and different preset times under the low crystallinity glass-ceramics are compared.

[0033] In this embodiment, the crystal phase distribution ratio of the low-crystallinity glass-ceramics and the crystal particle size are detected by XRD Bruker D8 detection equipment, and the data before and after the hot bending molding experiment of the low-crystallinity glass-ceramics are detected and compared.

[0034] The temperature range and preset time of the hot bending forming experiment are set as follows, and the hot bending forming test is performed by the 3D hot bending forming 22-station precision machine:

[0035]

[0036] Based on the above five sets of hot bending experiments, the crystal phase distribution ratio of the low crystallinity microcrystalline glass-ceramics and the crystal grain size were tested by XRD Bruker D8 testing equipment as follows:

[0037]

[0038]

[0039] The optical B value and haze of the low-crystallinity glass-ceramics after hot bending were tested at multiple points using the Konica Minolta spectrophotometer CM-3600D, including test point A, test point B, and test point C.

[0040] The test data is as follows:

[0041]

[0042] The smaller the B value and the smaller the haze, the better the quality of the microcrystalline glass.

[0043] The above embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make modifications to the embodiments without any creative contribution as needed. However, such modifications are protected by the patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A method for controlling the B value of glass-ceramics during 3D hot bending, characterized by: The following steps are involved: S1: Select multiple low-crystallinity glass-ceramics of the same size and volume for experimental preparation; S2: Conduct hot bending experiments on multiple low-crystallization glass-ceramics under different temperature environments; S3: Preheating the low-crystallinity glass-ceramics at high temperatures for multiple times in sequence and completing the final hot bending forming within a preset time; S4: Detect the crystal phase distribution ratio of the crystallinity and the crystal grain size of the hot-bent glass-ceramics; S5: Test the optical B value and haze of glass-ceramics after hot bending; Based on high-temperature preheating and hot bending at different temperatures and different preset times, the optical B value and haze of the microcrystalline glass after 3D hot bending are determined.

2. The B value control method for 3D hot bending of glass-ceramics according to claim 1 is characterized by: The crystal phase distribution ratio of crystallinity and the crystal grain size are tested before and after the hot bending forming experiment for low crystallinity glass-ceramics; based on the comparison of the crystal phase distribution ratio detection data and the crystal grain size detection data before and after the hot bending forming experiment of the same low crystallinity glass-ceramics, the data values ​​of high-temperature preheating and hot bending forming at different temperatures and different preset times under the low crystallinity glass-ceramics are compared.

3. The B value control method for 3D hot bending of glass-ceramics according to claim 1 is characterized by: The preset time is 80s-100s.

4. The B value control method for 3D hot bending of glass-ceramics according to claim 1 is characterized by: The temperature range of the hot bending forming experiment is between 450 degrees Celsius and 780 degrees Celsius.

5. The B value control method for 3D hot bending of glass-ceramics according to claim 1 is characterized by: The hot bending forming experiment is performed using a 3D hot bending forming machine.

6. The B value control method for 3D hot bending of glass-ceramics according to claim 2, characterized in that: The crystal phase distribution ratio and particle size detection of low-crystallinity glass-ceramics are carried out using an XRD detection instrument.

7. The B value control method for 3D hot bending of glass-ceramics according to claim 1 is characterized by: The optical B value and haze of the low-crystallinity glass-ceramics after hot bending are detected by using a spectrocolorimeter.

Images