post process
Finishing
Finishing services for aluminum die cast parts provide both protective and aesthetic benefits, ensuring that the final product meets industry standards for appearance and durability.
After an aluminum part has been die cast, finishing services are often required to enhance its surface quality, appearance, and durability. These finishing processes not only improve the aesthetics of the product but also add to its functional capabilities. Below, we explore the range of finishing services available for aluminum die cast parts.
Fettling and Linishing
Fettling involves using cutting machines to remove risers and other unwanted materials from casting blanks, serving as the initial step in the finishing process for any cast component. Linishing follows by using abrasive belts or grinding wheels to smooth the surfaces of the castings, effectively removing burrs and improving surface flatness.
As fundamental finishing processes, fettling and linishing prepare the part for any subsequent treatments. We perform both fettling and linishing in-house to ensure high-quality results and precise preparation for further processing.
Polishing
Polishing is a method of enhancing the surface finish of aluminum parts by using abrasive compounds to smooth and shine the surface. This process not only improves the aesthetic quality of the product, making it suitable for consumer-facing applications, but also minimizes surface irregularities that could affect performance or cause corrosion. Polished surfaces are common in decorative elements, automotive trims, and appliances where both function and appearance are critical.
Shot Blasting & Shot Peening
Shot blasting involves propelling tiny abrasive particles at high speeds onto the surface of the part. This effectively removes surface contaminants, prepares the part for subsequent treatments, and can impart a uniform matte texture. Shot peening, on the other hand, uses these particles to induce compressive stresses on the surface, thereby enhancing fatigue resistance and durability. This is particularly valuable for components subject to cyclic stress, such as those found in automotive and aerospace applications.
Heat Treatment
Heat treatment processes modify the physical and sometimes chemical properties of the aluminum part through thermal cycles. By precisely controlling heating and cooling rates, manufacturers can improve toughness, strength, and hardness of the component, making it capable of performing under demanding conditions. This treatment is often essential for structural components that require high durability and resistance to mechanical failure.
Powder Coating & Painting
Powder coating uses a free-flowing, dry powder that is electrostatically charged and sprayed onto the part. After application, the piece is cured under heat, forming a tough, resilient finish superior to conventional paints in terms of durability and resistance to chipping. Painting, meanwhile, provides a broader palette of colors and finishes, allowing for customization regarding gloss and texture. Both methods offer excellent protection against environmental factors, extending the life of the component.
Anodizing
Anodizing is an electrochemical process that thickens the natural oxide layer on the aluminum surface, providing enhanced corrosion resistance and the ability to accept dyes for color variability. This finish is exceptionally hard and wear-resistant, making it suitable for applications requiring durability and aesthetic versatility, such as consumer electronics and architectural products.
Plating
Plating involves depositing a thin layer of metal, like nickel, zinc, or chrome, onto the surface of the aluminum part. This enhances the component's resistance to corrosion, increases surface hardness, and in certain cases, improves electrical conductivity. Plated finishes are often used in automotive, aerospace, and electronics industries due to their ability to provide both functional and aesthetic benefits.
Impregnation
Impregnation is a process used to seal micropores in aluminum castings. This involves the use of penetrating agents that infiltrate the micropores through methods such as self-absorption, vacuuming, and pressurizing. Once the penetrating agent fills the pores, it is solidified through cooling or heating, effectively sealing the micropores. The primary goals of impregnation are to enhance the compactness, airtightness, and corrosion resistance of the aluminum castings.
The impregnation process can include various techniques such as vacuum impregnation, pressurized impregnation, vacuum pressurized impregnation, and ultrasonic impregnation. A full range of impregnation services is available to meet specific requirements.