| 摘要 |
PURPOSE:To prevent the generation of the secondary sagging of an electrodeposition paint in the stage of subjecting a material which is to be treated and has projecting parts having holes by providing holes for communicating the bottom and outside of the holes to the peripheral wall of the projecting parts and discharging the electrodeposition paint in the inside of the holes. CONSTITUTION:Grooves are preliminarily provided to the surface of spacers 2 having the holes 3 to contact with a cylinder head cover 1 in the stage of subjecting the cylinder head cover 1 provided with the above-mentioned spacers 2 to electrodeposition painting. The holes 4a, 4b through which the holes 3 in the spacers 3 communicate with the outside when the spacers 2 are integrally formed to the cylinder head cover 1 by spot welding are formed. The electrodeposition paint contained in the holes 3 of the spacers 2 are discharged from the holes 4a, 4b when the cylinder head cover 1 is immersed into an electrodeposition bath vessel and is pulled up from the electrodeposition paint after electrodeposition painting. The electrodeposition paint is, therefore, not left in the holes 3 when the cylinder head cover is sent to a sintering stage. The good electrodeposition coated film is thus obtd. without the generation of the secondary sagging of the electrodeposition paint.
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