Vortex sintering is a modern coating process that enables long-lasting, high-quality coatings for industrial applications . It is used in vehicle construction, mechanical engineering, medical technology and the food industry. At KREMER, this process is used with polyamide (nylon) and PVC to provide metal parts with robust and protective coatings.

The process of vortex sintering: step by step

The process begins with the preparation of the raw material, with PVC and polyamide being provided in powder form.

1. Preparation of raw material : PVC or polyamide is provided as a powder.
2. Heating : The parts are placed in a sintering furnace and heated to 350 to 400 degrees Celsius.
3. Powder application : The heated metal parts are immersed in a suspended cloud of powder made of PVC or polyamide. The powder melts on the heated parts and forms a dense layer.
4. Cooling : Slow cooling to avoid stresses in the coating.

Advantages of fluidized bed sintering in industrial applications

Fluid sintering offers many advantages for various industrial applications, especially when wear or corrosion protection is required:

• Uniform coating : Even with complex geometries, parts are coated evenly.
• Precise layer thickness : With a thickness of 0.1 mm to 0.5 mm, material is used optimally.
• High adhesion strength : The melting process creates a strong bond between metal and coating.
• Environmentally friendly : Excess powder can be recycled, minimizing waste.

Polyamide coatings from KREMER

At KREMER we use a polyamide with a hardness of 90 degrees Shore A, which impresses with its high abrasion and chemical resistance. Sintered parts can be partially dip-coated if required to further improve the surface quality. We offer the coating in black as standard, but other colors are also available on request.

Sintered parts can also be partially dip coated afterwards. This allows for softer, dampening or more abrasion-resistant coatings to be created in functional areas.

Possible applications in various industries

Fluid sintering is ideal for coating a wide range of products that would be difficult to process using traditional methods. This process has proven to be particularly effective in wear protection and insulation.

It offers precise control over layer thickness, consistent surface quality and high cost efficiency, making it a preferred choice for many industrial applications.