1. How to Improve Aluminum Profile Extrusion Die Quality
Firstly, before aluminum die working, the work tape must undergo grinding and polishing, the
work tape generally requires to be polished to a mirror finish. Check the flatness and
verticality of mold work tape before assembly. Whether the nitride quality is good or bad
decides the polished finish of work tape to a certain extent. The mold cavity must be cleaned
by using high-pressure gas, and brush, no dust or impurities, or it is vulnerable to the strain
working tape driven by the metal flow, making the extrusion aluminium profile products
surface to have roughness or crossed defects.
Secondly, the mold holding time in extrusion production is generally about 2-3 hours, but not
more than eight hours, otherwise mold work tape nitride layer hardness will be reduced,
cause wear at work and make the profile surface to be rough, which seriously will cause
cross and other defects.
Thirdly, use correct alkaline cleaning (cooking mold) method. After unloading mold, the mold
temperature is above 500 ° C, if immediately immersed in alkaline, because alkaline water
temperature is much lower than the mold temperature, if the mold temperature drops quickly,
mold is easily to have cracking phenomenon. The correct way is to place mold in the air to
100 ° -150 ° C and then immerse in the alkaline after unloading.
Fourthly, optimize the extrusion process. To extend the life of the die scientifically, rational
use of mold production is one aspect that should not be overlooked. Because the working
conditions of the extrusion die is extremely poor, extruded aluminium profiles production
must take reasonable steps to ensure the performance of the organization of the mold.
Fifthly, before the extrusion die is used, it needs to process reasonable surface nitriding
treatment process. Surface nitriding treatment enables the mold to greatly improve the
surface hardness in case of maintain sufficient toughness, in order to reduce the heat
generation. Note that the surface nitriding cannot be done once, 3-4 times nitriding treatment
must be repeated in the mold during service, which generally requires the thickness of the
nitrided layer reach about 0.15mm.
Sixthly, select the appropriate extrusion machine to produce. Before extrusion production, we
need to fully calculate the profile cross-section; according to the complexity degree of the
profile cross-section, thickness, size, and extrusion coefficient to determine the tonnage size
of the extruder.
Seventhly, aluminum profile extrusion machine-section is ever-changing, and the aluminum
extrusion industry developed by now, aluminum has the important advantage of light weight,
good strength, there are already many industries using aluminum profiles to take instead of
the original material. As part of the profile specialty leads to the special profile cross-section,
the design and production is more difficult.

2. Eighthly, reasonably choose aluminum extrusion billets and heating temperature. Strictly
control the ingredients of alloy extrusion billets. Generally the enterprises require ingot grain
size to reach standard A class, to enhance plasticity and reduce the anisotropy.
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