IMPROVED POWDER DISPENSER MODULES AND POWDER DISPENSER ASSEMBLIES

摘要

A powder dispenser module (54) includes a housing (150) that defines a conduit connecting a powder inlet and a powder outlet, a feed wand (160) to move powder through the conduit from the powder inlet to the powder outlet, the feed wand (200) including a lower feed element (230) coupled to a first drive shaft and an upper feed element (220) coupled to a second drive shaft, a first actuator coupled to the first drive shaft to rotate the lower feed element (230), and a second actuator coupled to the second drive shaft to rotate the upper feed element (220). In other embodiments, the feed wand (200) includes a shaft having a fluidizing element and an actuator produces oscillatory movement of the feed wand during dispensing of powder. Dispenser module arrays include one or a few rows of dispenser modules.