Production Process

The production of aluminium extrusions starts with a billet, which is cut either from long imported Aluminium logs or logs produced in-house according to pre-defined specifications using pure Aluminium ingots, primary or secondary scraps. In the extrusion process, a certain pressure is applied on a heated billet which comes through a heated container through the die to produce a long profile. The die forms a crucial part of the production process to provide the correct flow pattern and accurate dimensions. Extruded profile is then cooled using chilled water or air. It is then stretched to achieve the required straightness and cut into standard lengths. These profiles are then aged at elevated temperatures to improve their mechanical strengths. Once completed, the basic extrusion form of ‘Mill Finished’ is achieved.

Decorative/protective surface finishes such as anodized, powder coated and wood effect are value added forms of Mill Finish profiles. Color, coating thickness, lengths and type of finishes are decided according to customer requirements.

Protective Finishing Processes

Mill finish products

This is the basic form of the extruded Aluminium profile, having a raw, smooth Aluminium texture with mechanical strength and surface hardness. These products are widely used for pipes and hardware items.

Bronze anodized Process

Has the natural anodized finish with all the durability and surface characteristics. Various bronze shades are available depending on customer requirements.

Natural anodized Process

An accelerated and controlled protective layer is etched onto the mill finish surface using an electrolysis process. This process creates a uniform satin texture. The clear sealing process adds additional durability to prevent scratch marks. It is extremely durable for exterior applications including sea-side environments, particularly with a ‘high-micron’ coating.

Powder coating Process

A polyester powder mixed with color pigments are ionized through a pressure gun and sprayed onto the chemically pre-treated mill finish profiles, which are earthed and hung on a conveyor. The profiles which pass through the polyester powder ‘cloud’ are then subjected to deposits of powder onto the profile in a controlled manner to give a uniform layer. This profile with the dry powder on its surface is then passed through an oven for curing. The cured colored powder provides a lush durable texture to the surface. Various types of powder and pigments provide a large range of colors, shades and gloss texture to choose from.

Wood Finish Process

This is a powder coated profile with a base colour to match the wood finish texture. The profile is wrapped in a textured film and passed through an oven to print wood finish surface texture. This process is called sublimation. Currently, Alumex offers three types of wood finish products, which resemble the Oak, Teak and Mahogany wood surfaces.

Satin Finish Process

At Alumex, we offer specialized aluminum satin finishing services designed for profiles postextrusion. Our process utilizes stainless steel shot with a grit size of 0.15-0.25, enhancing the surface texture of aluminum and preparing it for anodizing and powder coating. We prioritize precision and consistency in every project, delivering high-quality finishes that align with your aesthetic and functional requirements. Whether you need smooth, uniform surfaces or specific textures, our expertise in satin finishing ensures outstanding results. Capacity: 9,000 MT per annum

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