Overall, the extrusion forming stage is the most crucial and critical stage in aluminum profile processing, and the overall process precision depends on the coordinated control of each key stage.
Why is extrusion forming the core?
Extrusion is the direct carrier for aluminum profiles to achieve the designed cross-section, dimensional accuracy, and basic mechanical properties; it is equivalent to the "forming core" of the entire processing flow:
It directly determines the product's precision and shape: The cross-sectional shape of the aluminum profile is entirely determined by the die design and extrusion process. Any deviation in extrusion speed, temperature, or pressure will lead to profile twisting, bending, and exceeding dimensional tolerances, directly affecting subsequent assembly and use.
It affects the final mechanical properties: During the extrusion process, the dynamic balance of temperature, speed, and extrusion pressure must be matched in real time. For example, the temperature of 6063 alloy bars needs to be controlled between 480-520℃. Speed deviations will directly lead to surface cracks or uneven performance, which is the basis for subsequent heat treatment and surface treatment.
Highest technical barriers: For complex irregular cross-sections and large-size profiles, mold design and extrusion parameter debugging require long-term process accumulation, directly determining the manufacturer's production capacity and product quality ceiling.
Other crucial links that cannot be ignored:
Besides extrusion, these two links also directly determine the final product quality:
Casting: As the starting point of production, it determines the internal quality of the profile. If degassing is incomplete or the composition ratio deviates, it will lead to porosity and inclusions inside the aluminum rod, inevitably resulting in scrap in subsequent extrusion, especially for thermally broken aluminum profiles, where casting quality directly affects the yield of the composite stage.
Aging treatment: This is the final step in achieving the final strength and hardness of the aluminum profile. Deviations in temperature and time control will directly lead to insufficient strength or over-aging and brittleness, directly affecting performance.
