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CN-121990758-A - Physically tempered mirror glass cover plate and manufacturing method thereof

CN121990758ACN 121990758 ACN121990758 ACN 121990758ACN-121990758-A

Abstract

The embodiment of the invention provides a physically toughened mirror glass cover plate and a manufacturing method thereof, wherein the method comprises the steps of adopting a titanium target material to coat a film on one side surface of a glass substrate to form a titanium film layer which can resist high temperature of 750-950 ℃ and is used as a mirror film layer; the method comprises the steps of pre-treating a glass substrate plated with a titanium film layer, performing rough cutting according to a preset size, performing finish machining by adopting CNC to obtain a preset shape, sending the pre-treated glass substrate into a physical tempering furnace to perform physical tempering treatment to obtain a compressive stress layer, sequentially performing heating, soaking and quenching air quenching on the glass substrate in the physical tempering furnace, wherein in the heating stage, the heating target temperature interval is 630-720 ℃, and performing annealing treatment on the tempered glass substrate to eliminate tiny uneven internal stress to obtain the mirror glass cover plate. According to the embodiment of the invention, the titanium target material is selected to form the titanium film layer, so that the titanium film layer is not oxidized during physical tempering treatment, the excellent mirror surface effect can be maintained, and the cost is reduced.

Inventors

  • WU GUANGFU
  • CHEN LIANG

Assignees

  • 赣州市德普特科技有限公司

Dates

Publication Date
20260508
Application Date
20260309

Claims (8)

  1. 1. The manufacturing method of the physically tempered mirror glass cover plate is characterized by comprising the following steps of: Coating a film on one side surface of a glass substrate by adopting a titanium target material to form a titanium film layer which can resist high temperature of 750-950 ℃ and is used as a mirror surface film layer; preprocessing the glass substrate plated with the titanium film layer, performing rough cutting according to a preset size, and performing finish machining by adopting CNC (computerized numerical control) to obtain a preset shape; Sending the pretreated glass substrate into a physical tempering furnace for physical tempering treatment to obtain a compressive stress layer, sequentially carrying out three stages of heating, soaking and quenching on the glass substrate in the physical tempering furnace, wherein the heating target temperature range is 630-720 ℃ in the heating stage, and And (3) annealing the tempered glass substrate to eliminate tiny unevenness of internal stress, and obtaining the mirror glass cover plate.
  2. 2. The method for manufacturing a physically tempered mirror glass cover plate as claimed in claim 1, wherein soda lime glass having a thickness of 1.8mm or more is selected as the glass substrate.
  3. 3. The method of manufacturing a physically tempered mirror glass cover plate as claimed in claim 1 or 2, wherein the pretreatment further comprises screen printing a sintering ink in a predetermined region of the glass cover plate where a predetermined shape is obtained.
  4. 4. The method for manufacturing a physically tempered mirror glass cover plate as claimed in claim 1, wherein the process parameters of the physical tempering treatment are as follows: heating stage, wherein the heating rate is controlled to be 30-50 ℃ per minute; a soaking stage, namely preserving heat for a preset time in the target temperature interval to ensure that the internal temperature of the glass substrate is uniform; And in the rapid cooling air quenching stage, clean air is sprayed to the surface of the glass substrate for rapid and uniform cooling, a compact and uniform compressive stress layer is formed on the surface of the glass substrate, the wind pressure range is controlled to be 5-15kPa, the cooling rate is more than 100 ℃ per second, the surface compressive stress value of the obtained product is more than or equal to 100MPa, and the depth of the compressive stress layer is more than or equal to 50 mu m.
  5. 5. The method of manufacturing a physically tempered mirror glass cover plate as claimed in claim 4, wherein the predetermined period of time is 2 to 10 minutes.
  6. 6. The method for manufacturing a physically tempered mirror glass cover plate as claimed in claim 4, wherein the clean air is sprayed onto the surface of the glass substrate by using a high-pressure, multi-nozzle, symmetrically arranged cooling system in a quenching stage.
  7. 7. The method of manufacturing a physically tempered mirror glass cover plate as claimed in claim 1, wherein the method further comprises the steps of: And (3) carrying out quality inspection on the obtained mirror glass cover plate, and removing defective products, wherein the quality inspection comprises detection of surface quality, dimensional accuracy and tempering strength.
  8. 8. A physically tempered mirror glass cover plate, characterized in that the physically tempered mirror glass cover plate is manufactured by the manufacturing method of the physically tempered mirror glass cover plate according to claims 1-7.

Description

Physically tempered mirror glass cover plate and manufacturing method thereof Technical Field The embodiment of the invention relates to the technical field of mirror glass cover plates, in particular to a physically toughened mirror glass cover plate and a manufacturing method thereof. Background With the rapid development of consumer electronics and high-end home appliances, the market places higher demands on the appearance and performance of glass cover sheets, which are favored because of their excellent decorative, high light reflectivity and profound visual effects. Conventional mirror glass cover plates are mostly realized by plating silver or paint on the surface of glass, but such glass cover plates face challenges in subsequent reinforcing treatment. The common reinforcing treatment process for the glass cover plate mainly comprises two major types of chemical tempering and physical tempering. Chemical tempering (ion exchange) is a common method for improving the strength of the glass cover plate, but the treated glass surface may have tiny roughness change or react with a film layer to influence the integrity and reflectivity of the mirror surface effect. More importantly, chemical tempering has limited strengthening effect on thicker glass cover plates (such as larger than 1.5 mm), and has the problems of shallow stress layer, easiness in generating stress spots and the like, and influences the optical uniformity. And the physical tempering (wind tempering) is to rapidly cool the glass after heating the glass to a temperature close to the softening point, form a uniform compressive stress layer on the surface of the glass and form a tensile stress layer inside, thereby integrally improving the mechanical strength and the shock resistance of the glass. The physical toughened glass cover plate has the advantages of deep stress layer, high strength, no stress spots, good optical performance and the like. However, the high temperature process of physical tempering (typically exceeding 600 ℃) places extreme demands on the material and surface state of the glass cover plate itself. Under such high temperature, the common coated mirror glass cover plate is extremely easy to oxidize, decompose or diffuse, so that the mirror effect is destroyed, the reflectivity is reduced sharply, the color is changed and even the function is disabled. Therefore, the prior art generally comprises the steps of firstly physically tempering and then forming the mirror surface film, however, as the tempered glass cover plate can not be cut and processed, only the tempered glass cover plate can be cut and formed and then physically tempered, and finally the mirror surface film is formed, so that the film coating treatment can be carried out on a large number of small-area glass substrates, the efficiency is low, the waste of target materials is serious, and the film coating uniformity is easily influenced. Disclosure of Invention The technical problem to be solved by the embodiment of the invention is to provide the mirror glass cover plate for physical tempering and the manufacturing method thereof, which can effectively avoid damage to the mirror film layer in the physical tempering process. In order to solve the technical problems, the embodiment of the invention firstly provides the following technical scheme that the manufacturing method of the physically tempered mirror glass cover plate comprises the following steps: Coating a film on one side surface of a glass substrate by adopting a titanium target material to form a titanium film layer which can resist high temperature of 750-950 ℃ and is used as a mirror surface film layer; preprocessing the glass substrate plated with the titanium film layer, performing rough cutting according to a preset size, and performing finish machining by adopting CNC (computerized numerical control) to obtain a preset shape; Sending the pretreated glass substrate into a physical tempering furnace for physical tempering treatment to obtain a compressive stress layer, sequentially carrying out three stages of heating, soaking and quenching on the glass substrate in the physical tempering furnace, wherein the heating target temperature range is 630-720 ℃ in the heating stage, and And (3) annealing the tempered glass substrate to eliminate tiny unevenness of internal stress, and obtaining the mirror glass cover plate. Further, soda lime glass having a thickness of 1.8mm or more is selected as the glass substrate. Further, the pretreatment further comprises silk screen printing the sintering ink on a predetermined area of the glass cover plate for obtaining a predetermined shape. Further, the process parameters of the physical tempering treatment are as follows: heating stage, wherein the heating rate is controlled to be 30-50 ℃ per minute; a soaking stage, namely preserving heat for a preset time in the target temperature interval to ensure that the internal temperature of the glass substra