Powder coating plant for architectural aluminium frame
Powder coating is the technique of applying dry paint to a part in the form of a fine powder which is electrically charged. The part is electrically 'earthed' so the powder is attracted to the part and stays in place through static electricity. The part is then placed in an oven and is subject to temperature which melts the polyester and allows the finish to flow and cure before the part is cooled and ready to use.
Polyester powder coating is the most commonly used system when coating architectural aluminium.
Once dry the pretreated aluminium is placed on a moving overhead gantry which transfers the aluminium to a spray booth. Powder coating guns coat the aluminium extrusions, cast aluminium or sheet with a fine but controlled surface thickness of powder. Any over-sprayed powder can be collected and re-used giving a coating efficiency that can be in excess of 95%
