Causes and Elimination Methods of Surface Embossed Ripple Defects in Aluminum Profiles

[China Aluminum Network] Causes of Convex Ripple Defects on Aluminum Profiles:
(1) The ratio of the length of the aluminum extrusion die working or the design of the cavity size is wrong.
(b) Extrusion moulds for aluminum work with obstructed and promoted flow angles.
(c) Aluminum profile extrusion die upper and lower die work zone with a worse drop ratio.
(4) The aluminum profile extrusion die upper and lower mold work belts are not parallel, and there is a cheek.
(5) The aluminum mold extrusion mold cavity resistance (partial) flow stage is too high to block the work belt discharge or drainage trough (size, depth, location) wrong.
(6) Aluminum extrusion dies work with little or no outside knives (Electric sparks do not play well) or too much (work with no support and cracking deformation).
(7) New mold or repaired aluminum extrusion dies Due to the inconsistency of the mold work performed by the mold factory, the unevenness of the mold work belt is uneven.
(8) Some aluminum profiles have oil traces on the extrusion work belt.
(9) The support pad is too small to block.
(j) Waves (volumes of V3 volume aluminum) appear in about 1m from the end of the aluminum profile.
Elimination method:
(1) Designing and manufacturing qualified aluminum extrusion dies is the key. The mold factory must eliminate man-made die processing defects.
(2) The waves are serious. They are repaired, remodeled, and returned.
(c) The new mold or repaired mold starts to swell with waves. The front rod can be extruded at low temperature and slowly, and the middle can be suspended several times to re-squeeze. The purpose is to fill the work with sticky metal, and sometimes the wave is natural. disappear.
(d) Slight waves are treated by increasing traction and increasing the amount of stretching.
(e) Slight wave, deviation of the center of the drum and the die face, so that the amount of aluminum flowing into the die cavity changes to affect the flow rate. This production is urgently needed and feasible. (Not recommended)
(6) The support cushion is reasonable and the discharge is smooth.
(7) The thickness of the wave is increased by about 1m at the tail end to reduce the extrusion speed. Or handle it when it is stretched.
(8) In the production process of aluminum, scratches due to small air knife or aluminum flow rate are found in the production process of aluminum materials. It can be oiled, quenched, and lubricated at the small side mold work belt and the pad side mold pad. (Note that the surface of the friction surface inspection)

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