(1) with advanced instrumentation and off-line detection of mold dimensional accuracy, hardness and surface roughness. Mold testing acceptance for registration, one library shelves, use a polishing mold hole collar work with, and diversion mode, profile mode, die pad assembly inspection, confirmation sent to the machine when heated;
(2) on the machine tool and die before the heating temperature requirements: Extrusion: 400 ~ 450 ℃, squeeze the pad: 350 ℃, mold pad: 350 ~ 400 ℃, flat die: 450 ~ 470 ℃, streaming mode: 460 ~ 480 ℃, holding time calculated according to the thickness of the mold ;
(3) mold in the furnace heating time work does not allow more than 10 hours, too long, die-hole corrosion or deformation is easy to work with;
(4) beginning in aluminum profile extrusion, the pressure increases to be slow, because the impact is likely to lead to blocking mode. If block mode, the need to immediately shut down to prevent the work of the die hole with crushed;
(5) mold unloading machine, leave to cool to 150 ~ 180 ℃ alive again when people cook alkali tank, because the mold at a high temperature alkali cooking, easy to heat shock cracking. And should the use of advanced treatment wash method to recover save lye, reduce pollution and achieve clean corrosion time;
(6) mold repair work in the triage module assembly, the application of copper gently Britain to fight, not allowed to hit with a big hammer, avoid excessive force, shock rotten mold;
(7) required before nitride mold die hole to work with a carefully polished surface roughness Ra0.8 ~ 0.4μm;
(8) dies before the required nitrogen clean, does not allow oil into the furnace; nitriding process should be reasonable (depending on device characteristics and the mold material), nitride surface hardness HV900 ~ 1200, nitride layer over thick, hard nitride layer will cause spalling. A mold generally allow 3 to 5 times nitride; complex high-power mode without tooth profile heat sink nitride process;
(9) of the new mold of the old products, bar mold, pipe mold test mold may, without direct nitriding; new products and complex mode shapes must be qualified by the test mode only after nitriding;
(10) after passing the test mode the new mode, up to 10 ingot extrusion machine should be unloading nitrogen treatment, to avoid working out with a groove; not too much between the two nitrogen production, the general level model 60 ~ 100 spindles, split mold 40 to 80 spindles is appropriate, too much nitride layer will pull through.
(11) after use of the mold polishing, oiling one library custody.
