초록 ▼

A spraying system for delivering a plurality of fluids for applying to a surface is disclosed. The spraying system includes a nozzle assembly having a fluid tip, a body with a central orifice and a set of orifices radially adjacent to the central orifice, an air cap having a set of passages in commu

A spraying system for delivering a plurality of fluids for applying to a surface is disclosed. The spraying system includes a nozzle assembly having a fluid tip, a body with a central orifice and a set of orifices radially adjacent to the central orifice, an air cap having a set of passages in communication with a set of orifices and a set of conduits contained at least partially within the set of passages, and a plurality of fluid circuits in communication with the nozzle assembly. One of the fluid circuits is adapted to deliver an adhesive, one of the fluid circuits is adapted to deliver an activator, one of the fluid circuits is adapted to deliver atomization air, and one of the fluid circuits is adapted to deliver fan air from the nozzle assembly. The spraying system also includes a controller that can be switched to an active state upon a which the fluid circuit for atomization air and the fluid circuit for fan air are opened essentially simultaneously, the fluid circuit for the activator is opened and then the fluid circuit for the adhesive is opened, and to an inactive state, upon which the fluid circuit for the adhesive and the fluid circuit for the activator are closed essentially simultaneously, and the fluid circuit for atomization air and the fluid circuit for fan air are closed essentially simultaneously. The adhesive is delivered in a generally axial direction through the central orifice in the body, atomization air to atomize the adhesive is delivered in a generally axial direction through the set of orifices in the body, fan air is delivered into the set of passages in the air cap and in a generally radial direction from the set of orifices in the air cap, and the activator is delivered into the set of passages in the air cap from the set of conduits so that the activator is atomized by fan air within the set of passages in the air cap and delivered from the set of orifices of the air cap, so that a fluid mixing area is provided outside the nozzle assembly in a space ahead of the orifices through which the adhesive and atomization air are delivered.

대표청구항 ▼

[ What is claimed is:] [25.]25. A method for controlling the fluid circuits in a spraying system having:a housing having a central orifice and a set of fan air orifices and a set of atomization air orifices, the fan air orifices and the atomization air orifices being radially adjacent to the central

[ What is claimed is:] [25.]25. A method for controlling the fluid circuits in a spraying system having:a housing having a central orifice and a set of fan air orifices and a set of atomization air orifices, the fan air orifices and the atomization air orifices being radially adjacent to the central orifice;a nozzle assembly for distributing adhesive through a fluid tip, atomization air through a plurality of central orifices and fan air through orifices of a distribution ring, the orifices of the distribution ring being radially adjacent to the central orifice;an air cap having a set of passages in communication with the orifices and a set of conduits contained at least partially within a set of passages, the nozzle assembly being at least partially disposed within the air cap; anda plurality of fluid circuits in communication with the nozzle assembly, one of the fluid circuits adapted to deliver an adhesive, one of the fluid circuits adapted to deliver an activator, one of the fluid circuits adapted to deliver atomization air, and one of the fluid circuits adapted to deliver fan air from the nozzle assembly to the air cap assembly;wherein the adhesive is delivered in a generally axial direction through the central orifice in the body, atomization air to atomize the adhesive is delivered in a generally axial direction through the set of orifices in the housing, fan air is delivered into the set of passages in the air cap and in a generally radial direction from the set of orifices in the air cap, and the activator is delivered into the set of passages in the air cap from the set of conduits so that the activator is atomized by fan air within the set of passages in the air cap and delivered from the set of orifices of the air cap;so that a fluid mixing area is provided outside the nozzle assembly in a space ahead of the orifices through which the adhesive and atomization air are delivered;the method comprising:switching a controller to an active state upon which the fluid circuit for atomization air and the fluid circuit for fan air are opened, then;opening the fluid circuit for the activator and opening the fluid circuit for the adhesive essentially simultaneously, then;spraying activated adhesive on a substrate, then;switching the controller to an inactive state upon which the fluid circuit for the adhesive and the fluid circuit for the activator are closed, then;purging the system with fan air and atomization air, then; andclosing the fluid circuit for atomization air and the fluid circuit for fan air essentially simultaneously.