Aluminum alloy door and window profile casting technology

Aluminum alloy door and window profiles serve as the fundamental building blocks for manufacturing aluminum doors and windows, forming the core structure of these products. The specifications, dimensions, precision levels, chemical composition, mechanical properties, and surface quality of these profiles significantly impact the overall performance, durability, and lifespan of the final products. First, the size specifications of aluminum door and window profiles are primarily defined by the height of the profile section, which is commonly referred to as the thickness of the frame in aluminum doors and windows. These sizes form a standard series, including 40mm, 45mm, 50mm, 55mm, 60mm, 65mm, 70mm, 80mm, 90mm, and 100mm. While aluminum windows typically use smaller size ranges, aluminum doors tend to have larger ones. It's important to note that even if two profiles share the same size series, their cross-sectional shapes and actual dimensions may vary significantly. Therefore, a detailed analysis is often required. Profiles can be either solid or hollow, with hollow profiles being more widely used. The minimum thickness for aluminum window profiles is 1.4mm, while for doors it should be at least 2mm. The length of the profiles can be fixed, double-length, or variable, with fixed lengths usually not exceeding 6 meters and variable lengths starting from 1 meter. Second, the chemical composition and mechanical properties of aluminum door and window profiles play a crucial role in their performance. These profiles are typically made from aluminum-magnesium-silicon alloys, containing elements such as silicon (0.2–0.6%), magnesium (0.45–0.90%), along with other trace elements like iron, copper, manganese, chromium, titanium, and zinc. The mechanical properties include a tensile strength of at least 157 N/mm², a non-proportional elongation stress of no less than 108 N/mm², an elongation of at least 8%, and a hardness of no less than 58 HV. Third, the production process of aluminum alloy profiles involves four main stages: ingot preparation, extrusion, heat treatment, and surface finishing. Ingot preparation includes batching, melting, casting, and soaking to create ingots with specific chemical compositions and dimensions. Extrusion takes place on an automated line involving heating, extruding, cooling, straightening, and cutting. The extrusion process uses hydraulic presses ranging from 1,200 to 2,500 tons, with extrusion temperatures between 360°C and 460°C. After extrusion, the profiles undergo heat treatment to enhance their mechanical properties, typically through quenching and aging processes. Finally, surface treatment is a critical step, with anodizing being the most common method. This process creates a durable, silver-white oxide layer on the surface, improving both aesthetics and longevity. The anodizing process includes steps such as degreasing, alkali etching, rinsing, anodizing, sealing, and drying. In addition to anodizing, coloring techniques like electrolytic and dip coloring can also be applied to achieve different color finishes. The oxide film thickness after anodizing must be at least 10μm to ensure quality and durability.

Stainless Steel Double-ended

Stainless Steel Double-ended,Stainless Steel Double-ended price,stainless steel double ended screws

JIANGSU CHENG AO METAL TECHNOLOGY CO., LTD , https://www.chengaostainlesssteel.com