A 3D cover glass upper and lower mold temperature synchronous control system and method

Abstract

A 3D cover glass upper and lower mold temperature synchronous control system and method, including the main circuit of the upper mold, the secondary circuit of the upper mold, the main circuit of the lower mold and the secondary circuit of the lower mold, the temperature of the heating wire of the upper mold and the heating wire of the lower mold is detected, according to The temperature difference is performed, and then the obtained temperature deviation signal is used as the power compensation signal of the heating wire of the upper and lower molds to adjust the power of the heating wire in real time, and the difference between the output temperature of the upper mold and the lower mold and the mold target setting temperature is used as an input adjustment To realize the effective control and adjustment of the temperature of the upper mold and the lower mold. The invention solves the problem of large product temperature overshoot, thereby improving the mold temperature control precision. While ensuring its own control accuracy, it can realize the effect of high-precision synchronous temperature control of the upper and lower molds, and also improve the dynamic performance of the system during the temperature transfer process, solve the synchronization and precision problems of the upper and lower molds of the 3D cover glass, and improve the 3D Cover glass molding yield and quality.

Description

technical field [0001] The invention belongs to the technical field of temperature control of 3D cover glass, in particular to a method for controlling the temperature synchronization of upper and lower molds on a 3D cover. Background technique [0002] With the wide application of wireless charging technology and flexible OLED, the cover glass needs to be made into a curved shape, which is called 3D cover glass in the industry. At present, the flagship models of many mobile phone manufacturers have launched 3D cover models. The 3D glass cover can be smoothly connected with the middle frame at 180°, which is more in line with ergonomic principles, thus greatly improving the tactile experience of sliding the screen. Glass materials are superior to metal and plastic materials in terms of anti-electromagnetic shielding, processability, and aesthetics. Mobile phone manufacturers also use 3D glass to replace metal or plastic back covers for product differentiation and wireless ch...

AI Technical Summary

Problems solved by technology

[0011] The traditional temperature control structure of the upper and lower molds is parallel control, that is, the temperature target value of each area is the same, and the temperature of the upper and lower molds is independently controlled. The temperature difference parameters of the upper and lower mold temperatures are not included in the algorithm processing, which will cause the temperature rise and fall between the areas. The speed is different, resulting in the temperature of the upper and lower dies and the surface temperature being out of sync

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