Second, the extrusion center must be adjusted before the die test, and the extrusion shaft, spindle barrel and die base discharge port are on the same center line.
Three, in the process of trial and normal production, the heating temperature of aluminum bar should be guaranteed between 480-520℃.
4. The heating temperature of the mold is controlled at about 480℃ according to the conventional mold temperature, and the heat preservation time of the flat mold with a diameter less than 200mm shall not be less than 2 hours, and that of the split mold shall be more than 3 hours; The mold with a diameter of more than 200mm is kept warm for 4-6 hours to ensure the uniformity of the core temperature and the external temperature of the mold.
5. Before trial production or production, the inner liner of the spindle drum must be cleaned with the cylinder cleaning pad, and the extruder should be checked for normal operation.
Six, try or just started production, extruder automatic gear disconnect, paragraphs switch to zero. Starting from the minimum pressure, gradually increase the pressure, and it takes about 3-5 minutes to discharge. In the process of aluminum filling, the pressure is mainly controlled. The pressure should be controlled within 100Kg/cm2, and the ammeter data should be within 2-3A. Generally, it can be discharged at 80- 120Kg/cm2, and then it can be slowly accelerated. The extrusion speed in normal production shall be subject to the pressure less than 120 Kg/cm2.
Seven, the mold in the trial production or production process, such as mold blockage, tooth profile deviation, speed deviation is too large. , should immediately stop, and in the form of point back to avoid die scrap.
Eight, die test or production process, the discharge port must be unobstructed, according to the discharge situation, reasonably grasp the tightness of the padding or fixture. Observe and find abnormal situations at any time, handle them in time, and stop immediately when stopping.
Nine, in the process of straightening, we should carefully detect the changes before and after, standardize the operation, use moderate force, and strictly guarantee the product quality.
Ten, according to the requirements of the production plan, reasonably determine the length, sawing, sawtooth feed speed can not be too fast, in order to avoid hurting the end, the end must be clamped to remove flash and burr.
1 1. Basket loading should be standardized, including reasonable placement of padding to avoid damaging the profile.
12. The aging temperature of the profile is controlled at190 5℃, the temperature is kept for 2.5-4 hours, and the profile is cooled by air after being taken out of the furnace.