[China Aluminum Industry Network] In order to solve the problem of black slagging and slag inclusion defects in 6063 and 6061 aluminum profiles, reduce the scrapped quantity and increase the finished product rate. Through long-term follow-up, the following three methods are proposed to prevent the 6063 and 6061 aluminum profiles from being darkened and slag inclusions:
1. Control of production process 1) After cutting the rods, clean the dust on the aluminum rods with a duct to reduce the ash and so on, and reduce the sources of black and slag inclusions; 2) Keep enough thickness to keep the thicknesses low. The pressure residue will cause the dead zone of the aluminum rod to be drawn into the end of the profile, resulting in dragging and slagging.
3) Extrusion speed should be effectively controlled, especially at the end of the deceleration process, to prevent turbulence from being involved in the skin impurities; 4) Clearing the cylinder for each production period;
2. Adjustment of equipment and equipment 1) If the squeeze rod is not centered, the material gallbladder will be worn during the movement of the squeeze rod, which will cause defects such as gall bladder, deformation and other defects;
2) The central position of the mold base shall be centered on the up, down, left, and right sides. It is strictly forbidden to move the mold base for production. If it is misaligned up or down, it is necessary to contact the machine repair for maintenance.
3) The size of pressed cakes should be tested regularly and replaced with new ones. For curled cakes, it will also cause blackouts, slag inclusions, etc.; 4) The long-term use of the material gallbladder will cause distortions such as bellies, which will also cause batch scrapping. This type of scrapping has occurred in production, and it needs attention. The new material must be removed from the gallbladder and the liner must be polished before it can be installed on the machine.
3, mold design, production plan adjustment 1) for the plane mold, if necessary, the installation of deflectors for diversion, this reduces the feed inlet, clamping the dead zone; 2) the material must be fully surrounded by the gall mouth Hole, the squad leader should compare each set of dies. If there is a phenomenon that the divergence hole is too large, it can't be put on machine to produce.
3) When planning for production, the original machine table (with the same diameter can be used universally) under the mold section should be planned according to the mold section. Do not produce the mold for the big rod machine.
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