Graphite 3D Hot Bending Die
The most important thing in 3D glass processing hot bending process is to ensure the thermal expansion coefficient of the mold and glass are consistent. The 3D glass expands when heated. If the coefficient of thermal expansion of the glass is large and the coefficient of thermal expansion of the mold is small, the glass may burst when the hot bending process is performed. On the other hand, if the coefficient of thermal expansion of the glass is small and the coefficient of thermal expansion of the mold is large, the glass may become wavy when the hot bending process is performed. Therefore, only the thermal expansion coefficients of the two are the same, and the heated curved glass will not be deformed, and the subsequent processing is good.
With the arrival of the 5G boom, the demand for signal transmission by smartphones has become higher and higher, and the accelerated penetration of technologies such as wireless charging in the mobile phone market has made the metal casing serving the smart phone industry for many years gradually withdraw from the historical stage. Hard and brittle materials such as glass, ceramics and sapphire are beginning to emerge. Among them, 3D curved glass has become the trend of the high-end smart phone cover market because of its excellent characteristics, exquisite appearance, mature technology and low cost.