POWDER COATING BOOTH

摘要

A powder spray for lengthy parts includes a booth wall structure comprised primarily of doors. A moveable roof may be raised and lowered to clean powder overspray from the interior surfaces of the booth. A cleaning process may be performed with a sideways extraction mode and a downward extraction mode. The mode change occurs when a bulkhead that travels with the moveable roof blocks the inlet duct to the recovery system. The recovery system may be a cyclone system for example. The doors of the booth are hinged so that they can be positioned for spraying operations and cleaning operations. Live hinge designs are provided and hose stress relief designs are also provided. The roof may carry accumulators for pressurized air that feed cleaning nozzles as the roof descends. In addition, exhaust air may be used to assist cleaning the interior surfaces as the roof descends. All of the energy provided for cleaning and color change may be provided by accumulators.

主权项

1. A method for extracting powder overspray from a powder spray booth, comprising:
lowering a roof from the top of the booth to near the bottom of the booth; applying pressurized air to remove powder off of interior surfaces of the booth as the roof is lowered; extracting powder sideways from the booth relative to the vertical axis of the booth during a first portion of movement of the roof, and extracting powder downward through the booth floor during a second portion of movement of the roof.