Metal parts are usually mass-produced, requiring consistent coating. Reciprocating automatic spray coating machines, relying on a programmable control system, can repeatedly execute the same spraying path, ensuring consistent paint film thickness and gloss on each workpiece.

Based on industry experience and standard equipment parameters, the single-pass coating thickness of a reciprocating automatic painting machine under standard operating conditions is typically between: 20μm and 60μm (i.e., 0.02 to 0.06mm).

Reciprocating automatic spraying machines are generally suitable for painting flat parts or lightly three-dimensional structural parts. Cabinet doors, as one of the main targets of spraying, are typical flat workpieces, but often feature complex details such as cutouts, decorative borders, and shadow lines.