Numerical simulation of temperature field for glass bulb mould

摘要

Through the analysis of thermal transfer of the mould and glass parts in the forming and coolingnstage of cathode ray tube (CRT) bulk, a numerical model is presented to simulate the mouldncooling of the glass bulb pressing process in the present study. In the model, heat transfer in thenmould region is considered to be cyclic-steady, three-dimensional conduction, and calculated bynusing a three-dimensional boundary element method; heat transfer within the glass melt region isntreated as transient, one-dimensional conduction, and simulated by a finite difference methodnwith a variable mesh. Compared with the experimental data, the numerical model developed herenis computationally efficient and sufficiently accurate. The developed simulation package is verynsuitable as a tool in the optimisation of mould and processing design, which is very valuable tonimprove the productivity and quality of glass bulb forming.