| 摘要 |
<p>A coated porous metal panel (10) includes a first outer surface (12) on one side of the panel (10), a second outer surface (14) on the other side of the panel (10), a plurality of laterally offset discharge and inlet pores (22,34) in respective ones of the first and the second outer surfaces (12,14), an internal chamber (32) in the panel (10) communicating with each of the inlet and discharge pores (22,34) so that tortuous gas flow paths are formed through the porous metal panel (10), and a shield lamina (16) mechanically clamped against the second outer surface (14). The shield lamina (16) has shield pores (42) aligned with the inlet pores (34) to permit gas flow into the inlet pores (34). A plurality of extraction passages (36) are formed in the panel (10) between the internal chamber (32) and the second outer surface (14) and directly behind each of the discharge pores (22). When the coating material (48) is sprayed on the first outer surface (12) with the shield lamina (16) not attached to the panel (10), surplus coating entering the discharge pores (22) passes through the extraction passages (36) for collection behind the panel (10). The shield lamina (16) blocks the extraction passages (36) to prevent gas flow into the extraction passages (36) and short circuiting of the tortuous gas flow paths in the porous metal panel (10). <IMAGE></p> |
