Here's a streamlined overview of this classic method:
Historic Methodology: The practice of immersing metal parts in thermoplastic powders is one of the earliest plastic coating strategies.
Preparation of Coating Material: Thermoplastic coatings are finely milled and housed in a steel container known as a Fluid Bed, which is sealed at the top and lined with a fine mesh at the bottom.
Creation of Fluidised Bed: By injecting air through the mesh, the powder is aerated, causing it to behave like a fluid for even application.
Component Treatment: Metal items are thoroughly cleaned and roughened, then heated to a specific temperature range (250-400 degrees Celsius) tailored to the coating requirements.
Coating Process: The heated components are submerged in the Fluid Bed, allowing the powder to fuse to the surface, forming a uniform, smooth coating.
This process exemplifies a durable and effective means of applying plastic coatings to metal substrates, widely recognised for creating high-quality, protective finishes.
