Spray coating system and method

A spray coating assembly, comprising:

• a coating head housing securable to a robotic arm and including a first end, a second end, and an outer peripheral surface that narrows toward the first end;
• a coating delivery region located near the first end of the coating head housing, the coating delivery region having a closed end opposite an open end, the closed end having a smaller diameter than the open end;
• at least one first orifice positioned in the coating delivery region and in fluid communication with a coating supply;
• and
• a ring portion having an inner surface, the ring portion coupled to the coating head housing, with the inner surface engaged with and encircling the outer peripheral surface, the ring portion including an array of second orifices distributed on a path along the ring portion and adjacent the inner surface, the second orifices being connectable to a fluid supply for providing a curtain of a fluid along the outer peripheral surface of the coating head housing toward the coating delivery region.

A spray coating assembly, comprising:

• a coating head housing securable to a robotic arm and having an outer peripheral surface, a first end, and a second end;
• a coating delivery region located near the first end of the coating head housing;
• at least one first orifice in fluid communication with the coating delivery region and a coating supply;
• and
• a ring portion coupled to the coating head housing, the ring portion including a first annular chamber including a passage in fluid communication with a fluid supply, and a second annular chamber coaxially aligned with the first annular chamber, the second annular chamber in fluid communication with the first annular chamber and one or more second orifices in fluid communication with the second annular chamber for providing a curtain of a fluid along at least a portion of the outer peripheral surface of the coating head housing toward the coating delivery region.