Windows & doors Aluminum extrusions

The influence of windows and doors aluminum extrusions on the quality of finished profiles

Aluminum extrusions for doors and windows have a crucial impact on the quality of finished profiles, which is mainly reflected in the following aspects:
Dimensional accuracy and shape stability:Dimensional accuracy: During the extrusion process, factors such as extrusion speed, mold design, and temperature control will directly affect the dimensional accuracy of the profile. Too fast or too slow extrusion speed may cause the cross-sectional dimensions of the profile to be unstable and deviate. The accuracy and wear of the mold will also directly affect the molding quality of the profile.
Shape stability: During the extrusion process of the profile, if the mold design is unreasonable or the extrusion process is improperly controlled, shape defects such as bending and twisting are prone to occur, affecting the installation and use of doors and windows.
Surface quality:Surface finish: During the extrusion process, factors such as mold surface quality, extrusion speed, and cooling method will affect the surface finish of the profile. Rough or scratched mold surface will cause corresponding defects on the profile surface.Extrusion speed is too fast, metal flow is uneven, and ripples or scratches may also form on the profile surface.
Surface defects: Surface defects such as slag inclusions, bubbles, and cracks, which not only affect the aesthetics of the profile, but also may reduce its mechanical properties and corrosion resistance. The generation of slag inclusions and bubbles is related to factors such as ingot quality and extrusion process control; cracks may be related to factors such as too fast extrusion speed and too high mold temperature.
Mechanical properties:Tensile strength and yield strength: Reasonable control of the extrusion process can ensure that the profile has good mechanical properties. During the extrusion process, the metal undergoes plastic deformation to form a dense fiber structure, thereby improving the tensile strength and yield strength of the profile.
Elongation and toughness: A reasonable extrusion process can also improve the elongation and toughness of the profile, so that it has better deformation resistance and impact resistance during use.
Corrosion resistance:Surface oxidation treatment: Extruded profiles usually need to be surface oxidized to improve their corrosion resistance. The dense fiber structure formed during the extrusion process is conducive to the formation and adhesion of the oxide film, thereby improving the corrosion resistance of the profile.
Coating quality: If the profile needs to be coated with other materials to improve its corrosion resistance or aesthetics, the extrusion process will also affect the adhesion and uniformity of the coating. Surface defects formed during the extrusion process may affect the adhesion and corrosion resistance of the coating.
Comprehensive influence:Aluminum extrusions for doors and windows have an all-round impact on the quality of the finished profiles. From dimensional accuracy, shape stability to surface quality, mechanical properties and corrosion resistance, the extrusion process needs to be strictly controlled to ensure that the quality of the finished profiles meets the relevant standards and requirements. Therefore, when choosing aluminum extrusions for doors and windows, products from manufacturers that use advanced production processes and have a strict quality control system should be given priority. At the same time, during installation and use, care should be taken to avoid unnecessary damage and destruction to the profiles to ensure their long-term stable performance.

windows and doors aluminum extrusions ensure surface quality after treatment

Ensuring the surface quality of window and door aluminum extrusions after treatment is a process involving multiple links and factors. The following are some key measures and precautions to ensure that the surface quality of window and door aluminum extrusions after treatment meets the requirements:
Raw material quality control:Aluminum ingot purity: Use high-purity aluminum ingots as raw materials to avoid scrap aluminum or aluminum ingots with too many impurities to reduce surface defects caused by the extrusion process.Raw material ratio: Ensure that the raw material ratio is uniform to avoid surface quality problems caused by improper ratio.
Extrusion process control:Mold design and quality:Reasonable design: The mold design should fully consider the cross-sectional shape, dimensional accuracy and surface quality requirements of the profile to ensure uniform metal flow during extrusion and avoid surface defects.
Quality inspection: Regularly check the wear of the mold and the finish of the working surface, and replace the mold with severe wear in time to avoid surface roughness or scratches caused by mold problems.
Extrusion speed: Control the extrusion speed within a reasonable range to avoid surface quality problems caused by too fast or too slow. Too fast extrusion speed may cause uneven metal flow and form a rough surface; while too slow speed may reduce production efficiency.
Extrusion temperature: Reasonably control the extrusion temperature to ensure that the metal has good fluidity and plasticity during the extrusion process. Too high or too low temperature may cause surface roughness or internal defects.
Subsequent processing technology:Cooling and straightening: The extruded profile should be cooled and straightened in time to avoid deformation and surface defects caused by thermal stress.Surface treatment:Anodizing: Through anodizing, a dense oxide film is formed on the surface of the profile to improve corrosion resistance and surface hardness. Pay attention to controlling the temperature and concentration of the electrolyte to avoid the production of white opaque powder or burns.
Electrophoretic coating: Use electrophoretic coating technology to form a uniform and dense coating to improve the decorativeness and corrosion resistance of the profile. Pay attention to controlling the composition and baking time of the tank liquid to avoid defects such as blistering and pinholes.
Powder spraying: Use electrostatic powder spraying technology to form a strong and durable coating on the surface of the profile. Pay attention to the quality of raw materials and the control of the spraying process to avoid defects such as particles and shrinkage.
Quality inspection and control:Online inspection: Set up online inspection equipment during the extrusion process to monitor the dimensional accuracy and surface quality of the profile in real time, and find and solve problems in time.Finished product inspection: Strictly inspect and test the finished product after extrusion to ensure that the surface quality meets the relevant standards and requirements. Rework or scrap unqualified products.
Environmental control:Keep the production workshop clean and dry to avoid dust, oil and other impurities from contaminating the profile surface. At the same time, control the temperature and humidity of the production workshop to provide stable environmental conditions for extrusion and subsequent processing.
By strictly controlling the quality of raw materials, extrusion process, subsequent processing process, and quality inspection and control, it can be ensured that the surface quality of aluminum extrusion parts for doors and windows meets the requirements after processing.