Abstract: [Objective] The purpose of this paper is to study the film thickness and its uniformity of wooden door after rotary cup type electrostatic spraying.[Method] The theoretical analysis model of film thickness and its uniformity of wooden door after rotary cup type electrostatic spraying are built based on numerical calculation method in this paper. The effects of feed speed of wooden door, distance between spray guns, vertical direction movement speed, horizontal direction movement stroke and vertical direction movement stroke of spray gun on the film thickness and its uniformity of wooden door are mainly studied.[Result] Analysis result show that vertical speed of spray gun has a little effect on the average film thickness of wooden door, but has a certain influence on standard deviation (uniformity) of film thickness and there is not a linear relationship between them; wooden door feed speed has an obvious effect on the average film thickness of wooden door, but has a little effect on standard deviation of film thickness; the average film thickness of wooden door increases firstly and then tends to be stable with horizontal stroke of spray gun, standard deviation of film thickness decreases firstly and then tends to be stable with horizontal stroke of spray gun; vertical stroke of spray gun has an obvious influence on both the average film thickness and standard deviation of film thickness; distance between spray guns has a little effect on the average film thickness of wooden door, but has a certain influence on standard deviation of film thickness and the relationship between them is periodic.[Conclusion] The numerical calculation model of film thickness and its uniformity of wooden door after rotary cup type electrostatic spraying can predict the average film thickness and standard deviation of film thickness of wooden door, which can provide theoretical guidance for the operation parameters optimization of the rotary cup type electrostatic spraying equipment.

Key words: wooden door, electrostatic spraying, film thickness