Precautions for aluminum extrusion dies - the second part

These is the second part of precautions for aluminum profile extrusion molds.

(4) At the beginning of extrusion of aluminum alloy profiles, pressure needs to be applied slowly, because the impact force is likely to cause mold blocking. If the mold is blocked, the machine needs to be stopped immediately to prevent the mold hole working belt from being crushed;

(5) After the mold is unloaded, wait until it is cooled to 150~180℃ before placing it in an alkali tank for cooking. Because the mold is cooked in alkali at high temperatures, it is easy to be cracked by the heat wave. Advanced etching and cleaning methods should be adopted to recover and save alkali solution, shorten corrosion time and achieve pollution-free cleaning;

(6) When assembling the shunt mold, the mold repairer of the aluminum profile extrusion mold should lightly tap it with a copper rod, and is not allowed to hit it hard with a large hammer to avoid using excessive force and damaging the mold;

(7) Before nitriding the aluminum profile extrusion die, the die hole working belt needs to be carefully polished to a surface roughness of Ra0.8~0.4μm;

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