The invention discloses a
metal plate paint spraying method. The
metal plate paint spraying method comprises the following steps: the surfaces of
metal plates are cleaned to achieve smoothness, cleanness, no dust, no
rust and no
grease, and
dirt and
grease in scratches in the surfaces of the metal plates are removed in the
scratching direction; the
surface roughness of the cleaned metal plates isincreased; then,
corrosion-resistance
epoxy primers are sprayed to the surfaces of the metal plates; the surfaces of the metal plates are heated and dried by 15-25 min after spraying; the
drying temperature is maintained within 165-175 DEG C; then, the surfaces of the dried metal plates are flatly grinded, and
putty is scraped and coated in the uneven places of the surfaces; middle paint
layers are sprayed to the surfaces of the metal plates after scraping of the
putty; after all spraying, the metal plates are dried by 5-10 min; then, the metal plates are baked by 10-12 min through a short-wave
infrared baking lamp; the metal plates are polished after total
drying of the middle paint
layers; and surface paint is sprayed to the surfaces of the metal plates for
drying. The metal plate paintspraying method is simple and low in operation cost, and improves the mechanical performances and the glossiness of paint spraying
layers.