Ultrasonic-assisted glass heat-bending device based millimeter-wave heat source and control method

Abstract

The ultrasonic-assisted glass heat-bending device based a millimeter-wave heat source and a control method. The ultrasonic-assisted glass heat-bending device comprises a machine frame; a feeding area and a discharging area are respectively arranged on two sides of the machine frame; a furnace cavity is formed on the machine frame; a control box is arranged at one side of the machine frame; a graphite mould and a variable-frequency millimeter-wave heat source connected with the control box are arranged in the furnace cavity, wherein the frequency of the variable-frequency millimeter-wave heat source ranges from 2.5 GHz to 20 GHz, and the power is of kilowatt magnitude; a cavity is formed in the graphite mould; a preheating area, a hot bending pressurizing area, a pressure maintaining area and a cooling area are arranged on the furnace chamber; a shifting fork executing mechanism used for shifting the graphite mold is arranged on the machine frame; and the preheating area, the hot bending pressurization area, the pressure maintaining area, the cooling area and the shifting fork execution mechanism are separately connected with the control box. According to the invention, the mold is heated more uniformly, the molding rate and material surface quality are remarkably improved by assistance of ultrasonic vibration, and parameters such as temperatures, pressure and the like are controlled cooperatively in different areas, so that requirements for manufacturing 3D ultra-thin glass with high surface quality are met.

Description

technical field [0001] The invention relates to a glass hot-bending device, in particular to a multi-station ultrasonic-assisted 3D glass hot-bending device and a control method based on a millimeter-wave heat source. Background technique [0002] With the replacement of LCD screens by flexible OLEDs and the application of new communication technologies such as 5G and wireless charging, traditional metal structural parts are difficult to meet the needs of the new generation of smart terminals due to the shortcomings of metal shielding, difficult curve shape, and unsightly appearance. 3D ultra-thin glass can not only eliminate signal shielding defects, but also has excellent special features such as thinness, cleanliness, anti-vertigo, good heat dissipation, wear resistance, etc., and is currently the only one that can better fit curved screens and adapt to ultra-large-scale mass production The intelligent terminal material of the model can not only be applied on the mobile p...

AI Technical Summary

Problems solved by technology

[0003] The traditional hot bending process for 3D ultra-thin glass hot-bending molding is prone to surface defects such as crystallization, holes, and cracks, and the scrap rate is relatively high, because 3D ultra-thin glass is difficult to measure in terms of scale, shape complexity, temperature sensitivity, and stress tolerance. It is quite different from ordinary glass in terms of properties, and it is difficult to achieve uniform heating and pressure during the hot bending process, resulting in large temperature gradients, non-uniform stress distribution, and severe glass rheology during the hot bending process. Will directly affect the quality of hot bending

Therefore, the traditional hot bending molding of ordinary glass is not applicable, and it is difficult to meet the manufacturing requirements of 3D ultra-thin ultra-thin glass surface quality

Images