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ã€ALUMINIUM NETWORK】Main reason analysis Due to the insufficient air cooling at the outlet of the extruder, the aluminum extrusion (Aluminium Extrusion) contacts the oscillating bed at a higher temperature. The cooling rate of the contact part is different at other locations, and there is a thick Mg2Si phase. Precipitation, after anodizing the site turned dark gray.
Solution 1. Strengthen the air-cooling intensity to avoid too small interval of the profile on the swing bed and ensure the air-cooled temperature gradient;
2. Conditional factories should adopt a combination of atomized water cooling and air cooling to completely eliminate dark spots.
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