Coating apparatus for coating an inside of a hollow body with an atomized fluid

摘要

A coating device for coating an inside of a hollow body with an atomized fluid has at least one atomizing tube enclosing an atomizing channel. A pressurized propellant gas for atomizing an unatomized fluid can be introduced into the atomizing tube. The atomizing tube has at least one outlet opening and further has at least one hollow needle having a discharge opening for the unatomized fluid. The at least one hollow needle interacts with the atomizing channel and is arranged essentially coaxially thereto. The atomizing tube and the hollow needle form a Venturi arrangement.

主权项

1. A coating device for coating an inside of a hollow body with an atomized fluid, the coating device comprising:
at least one atomizing tube enclosing an atomizing channel in which propellant gas for atomizing an unatomized fluid is introduced and which has at least one outlet opening on the at least one atomizing tube having a tube discharge opening; and at least one hollow needle having a needle discharge opening for the unatomized fluid, the at least one hollow needle interacting with the atomizing channel and arranged essentially coaxially thereto, the at least one atomizing tube and the at least one hollow needle forming a Venturi arrangement having a narrowed cross section proximate the needle discharge opening of the at least one hollow needle, the needle discharge opening of the at least one hollow needle arranged essentially coaxially to the atomizing channel, the tube discharge opening of the at least one atomizing tube arranged downstream of the Venturi arrangement; and wherein the at least one outlet opening is displaceable over at least a part of an axial extension of the inside of the hollow body and the at least one atomizing tube is centered by a centering device with regard to a longitudinal axis of the hollow body; wherein the needle discharge opening is located in a region of the at least one atomizing tube having a narrowest cross section; wherein the hollow body is a syringe or a carpule; and wherein the centering device includes a plurality of centering arms, each centering arm having a first segment and a second segment, each first segment extending axially with respect to a centering axis of the centering device, each second segment defining an inclined plane extending radially and axially relative to the centering axis and for engaging an interior of the hollow body, the at least one atomizing tube being axially movable relative to the plurality of centering arms.