Modelling and simulation for cooling processes in television panel manufacture

Abstract

Cooling design in the forming operation of the television (TV) panel is important because it significantly affects the part quality associated with residual stresses and productivity. A mathematical model and numerical simulation for the cooling process of the panel has been developed. The renormalization group turbulence model is applied for the jet impinging cooling, and a local one-dimensional transient analysis in the thickness direction is adopted for the part, which employs the finite difference method. The experimental verification shows a good agreement with the simulation results.

Simulation Strategy of the Final Dimension in the Glass Pressing Process

“…As mentioned earlier, the history and distribution of the part temperature and pressure during the whole forming process are essential inputs. A complete simulation of the forming cycle was carried out in advance 13–18 . For example, the predicted and measured temperature history of Points 1′, 4′, and 6′ are illustrated in Fig.…”

“…However, for the analysis of part contraction and mold deformation, the history and distribution of the temperature and pressure of the part during the whole forming process, together with the cycle‐averaged steady temperature distribution of the mold, are essential inputs. Therefore, a complete simulation of the forming cycle is a precondition for predicting the final dimension, which has already been performed by the author's group 13–19 …”

“…The following process of the part cooling after the pressing stage is modeled by a local 1D transient analysis in the thickness direction, which uses a finite‐difference method. Different boundary conditions during the whole forming stage are considered 17,18 …”

A Web-based Remote Simulation System for the Glass Pressing Process

“…An implicit, finite-difference method with a variable mesh is used to solve Equation (13). The thickness of the part is discretized into J nodes i.e.…”

“…T n i represents the part temperature of s i at time t n . Equation (13) can be expressed in an implicit finite-difference form as…”