Gas distributor for vapor coating method and apparatus

摘要

A gas distributor (10) suitable for introducing a carrier gas at the top (114) of a coating container (110) used to provide a metallic coating on articles (132). The gas distributor (10) includes a gas inlet (14) and a gas outlet head (18) in communication with the gas inlet for receiving a flow of gas from the gas inlet. A plurality of gas outlets through which the gas flow exits as a gas stream (50) are spaced along the peripheral surface of the gas outlet head (18). A plurality of gas deflectors (34), each proximate to one of the gas outlets, at least initially direct the gas stream (50) exiting the gas outlet (30) in at least a generally centripetal path. This gas distributor (10) can be used in vapor coating apparatus (100) having a coating container (110), at least one holder (128) for each article (132) to be coated positioned within the coating container (110) and below the gas outlet head (18) of the gas distributor (10) and at least one holder (140) for the source of the metallic coating positioned within the coating container (110) and below the gas outlet head (18) of the gas distributor (10). A method is also provided for introducing the carrier gas as a plurality of carrier gas streams (50) proximate the top (114) of the coating container (110) so that each carrier gas stream (50) flows at least initially in at least a generally centripetal path, as well as a method for coating the articles (132) with a metallic coating in the coating container (110).