초록 ▼

In a powder coating system wherein the powder is introduced via a feed conduit from the feed point to a mixing chamber, a pressure gradient oriented against the chamber is produced along the feed conduit by acceleration of a gas jet in the mixing chamber, and pressure recovery is obtained by retardi

In a powder coating system wherein the powder is introduced via a feed conduit from the feed point to a mixing chamber, a pressure gradient oriented against the chamber is produced along the feed conduit by acceleration of a gas jet in the mixing chamber, and pressure recovery is obtained by retarding the powder-gas stream, in order to feed the powder-gas stream through a conveying line to a coating unit. For increasing the quantity of powder dispensed per unit time to the powder coating system, the pressure drop in the powder-gas stream along the conveying line is at least in part compensated for by raising the pressure at the feed point.

대표청구항 ▼

A process for selectively setting the quantity of powder continuously dispensed per unit of time out of an outlet of a powder coating system, comprising: feeding the powder out of a powder container to a mixing chamber by generating a pressure drop from said powder container to said mixing chamber b

A process for selectively setting the quantity of powder continuously dispensed per unit of time out of an outlet of a powder coating system, comprising: feeding the powder out of a powder container to a mixing chamber by generating a pressure drop from said powder container to said mixing chamber by means of a gas jet injected into said mixing chamber; propelling said powder fed to said mixing chamber out of said chamber into a conveying line to said outlet by said jet of gas; enlarging a diameter of said conveying line downstream and adjacent said mixing chamber to recover static pressure by retarding said powder and said gas; propelling said powder and said gas along said conveying line and out of said outlet predominately by a pressure difference of said static pressure recovered and a static pressure of a surrounding of said outlet; and settling the quantity of powder dispensed per unit of time out of said outlet of the powder coating system by setting the static pressure within said powder container independently from generation of said gas jet injected into said mixing chamber so as to settle said pressure difference by said pressure recovery and said static pressure selectively settled.