Patent ID: 8951022
Filing Date: 2015-02-10
Classification: B05B

Abstract:
1. A powder feed apparatus for a powder spraycoating equipment, said powder feed apparatus comprising: an integral structural block including ducts, said integral structural block having a first end face and a second end face opposite to the first end face, wherein the integral structural block is made continuously of the same material; a dense phase powder pump having at least two feed chambers located within the integral structural block, said at least two feed chambers each comprising a first end and a second end opposite to the first end, said at least two feed chambers respectively having at least one air exchange aperture to alternate between applying compressed conveying air and applying vacuum to the respective feed chamber; respective powder intake valves located at the first ends of the at least two feed chambers and respective powder outlet valves at the second ends of the at least two feed chambers, said powder intake valves being located at the first end face of the integral structural block and said powder outlet valves being located at the second end face of the integral structural block, and a plurality of first control valves directly arranged at the integral structural block, and each first control valve directly connected, in fluid communication by the ducts, to the respective feed chambers for applying the alternating compressed conveying air and the vacuum to the respective feed chambers such that powder is aspirated in the respective feed chambers and subsequently discharged upon opening of the respective powder outlet valves.