The characteristics of curing heating systems: (1) high running cost is the highest consumption in heating system. (2) the heating element in the heating system occupies a larger space in the solidified oven, and the volume of the same size can be reduced, and the width becomes smaller. (3) the workpiece must keep a certain distance from the electric heating element, otherwise the local temperature will cause the color difference too high, which further reduces the available space in the curing furnace.