Low pressure air atomizing internal mixing air spray gun

摘要

PURPOSE:To stabilize a pattern and to control a pattern width by spraying a mixed stream of coating material and air from a lip-shaped spray orifice and injecting outwardly opened air streams toward the spray stream in opposed relation to both sides of the spray stream in front of the spray orifice. CONSTITUTION:Air is mixed with the paint stream, which is injected from a coating material nozzle 1 whose opening is controlled by a needle valve, from the periphery and this mixed stream is sprayed from a spray orifice 11 and air is injected from both side surfaces opposed to the spray stream to be again mixed with the spray stream to atomize the same. The nozzle 1 of a spray gun has a round hole and the outer shape thereof is made circular while the spray orifice 11 has an almost lip-shaped opening different in a longitudinal and lateral opening ratio and the outer shape thereof is formed into a conical shape. Atomizing heads each equipped with a side surface air hole 18 injecting an outwardly opened air stream toward the spray stream are provided in opposed relation to both sides of the spray stream in front of the spray orifice 11. As a result, a pattern can be stabilized and a pattern width can be controlled.