Cfd Simulation And Structure Optimization Of The Hot-Air Drying Oven Of A Gravure Printing Machine

Gravure printing machines are widely used in modern printing fields due to their particular advantages. This paper establishes a multi-beam air impinging drying model for a convection drying device, and builds a CFD analysis model. Through analyses of flow traces and pressure nephograms of a drying oven, the hot-air flow state and pressure distribution characteristics are presented, corresponding to a complex structure. Based on dynamic simulation analysis, an air duct with a connecting bottom structure is provided, which effectively improves non-uniform air blowing. The air suction port in the bottom is also designed to solve the problem of organic solvent retention. To improve non-uniform circulation and increase utilization efficiency, following comparative simulation analysis, this paper puts forward a new tuyere structure with a horizontal clapboard. The optimum dimensions for this new structure are obtained. This paper also obtains the optimum interval of tuyeres and the optimum distance to surfaces of substrate, which increases drying efficiency and decreases solvent residual efficiency. This paper analyzes the performance characteristics of a drying oven and mastered drying technical parameters, hence providing evidence and support for drying system optimization and innovative design.