Feeding device for powder spray coating device

摘要

A powder feed apparatus for a powder spraycoating equipment includes a dense phase powder pump fitted with at least one, or two feed chambers. Each of the feed chambers includes at one chamber end a powder intake valve and at the opposite chamber end a powder outlet valve and further includes at least one air exchange aperture to alternatingly apply compressed conveying air or a partial vacuum to the feed chamber. The apparatus further includes an integral structural block. The structural block includes the feed chambers and first control valves connected in fluid communication to at least one of feed chambers for the purpose of applying compressed conveying air and a partial vacuum to it. The first control valves are directly connected, in fluid communication via ducts constituted in the structural block, to at least one of the feed chambers.

主权项

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.