Forming method of 3D curved glass, forming system and 3D curved glass

Abstract

The invention discloses a forming method of 3D curved glass, a forming system and the 3D curved glass. The forming method of the 3D curved glass comprises the following steps: a second manipulator (2)performs die assembling on the basis of position information scanned by a scanning unit (5) to form forming dies (6) for loading materials; the multiple forming dies (6) are horizontally conveyed into a die carrying cavity (8) in sequence; after being vacuumized, the die carrying cavity (8) is filled with nitrogen to enable gas pressure in the die carrying cavity (8) to be equal to that of a furnace body (9); the forming dies (6) pass through a first group of preheating regions (10) for heating glass from a temperature to a glass transition temperature and a second group of preheating regions(11) for heating the glass from the glass transition temperature to a preheating temperature in sequence through a conveying mechanism; after being formed, annealed and cooled, the forming dies (6) are conveyed to a position near to the die carrying die (8) through a conveying guide rail (7) for material reloading; the multiple forming dies (6) are repeatedly subjected to the processes to realizeautomatic forming in the whole procedure.

Description

technical field [0001] The invention relates to the technical field of glass processing, in particular to a forming method of 3D curved glass, a forming system and 3D curved glass. Background technique [0002] In the field of mobile phone touch screens, the appearance of mobile phone touch screens has been changing in pursuit of beauty and feel. From the earliest 2D screen 2.5D screen to the latest 3D screen, 3D hot bending equipment is suitable for the production of curved glass forming on 3D glass cover plates. . The main process is to put a certain size of optical glass into the hot bending equipment for preheating, forming, annealing and cooling to complete the production of the product. [0003] The current 3D molding technology is divided into three types: the first is to use CNC equipment to clamp an electric spindle with a diamond grinding wheel rod rotating at high speed for cold grinding. This will cause two problems. Products with an arc height > 2mm cannot b...

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Problems solved by technology

[0003] The current 3D molding technology is divided into three types: the first is to use CNC equipment to clamp an electric spindle with a diamond grinding wheel rod rotating at high speed for cold grinding. This will cause two problems. Products with an arc height > 2mm cannot be done. Subsequent glass polishing time is too long and not suitable for mass production

The second is high-frequency non-contact induction heating, which will cause the mold to heat up and cool down quickly, resulting in residual stress in the glass and insufficient surface flatness. Only ordinary glass protection sheets with a thickness of about 0.33mm and high-alumina glass covers with a thickness of more than 0.5mm can be formed. The board cannot be produced, and high-frequency equipment will cause radiation to the human body, which is extremely harmful

The third type of molding equipment is a precision machine, but there are too few cooling stations for glass preheating and return, the control system is simple, all operations are manual, and the degree of automation is not high. There is no problem with the back cover of the mobile phone that is not very high, but the yield rate of the front cover of the mobile phone is too low

[0004] At present, the third type of precision molding equipment has defects such as incapable of automatic control of the whole process, inaccurate temperature control, high defect rate and long molding time.

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