Aluminum extrusion die structure
Aluminum extrusion die material is H13 steel.
Molds can only be used after nitriding.
The whole set of mould is composed of die, die pad and die cover.
Let's look at the structure of a normal module.
I. Work belt
The working belt is perpendicular to the working face of the mold, forming the profile shape.
Working belt is too short, aluminum profile size is difficult to stabilize.
If the working belt is too long, it will increase the friction of the metal and increase the extrusion pressure, which is easy to bond with the metal.
Second, air knife
Ensure the qualified rate of profile, ensure the quality of aluminum and die life.
3. Guide plate
A transition shape is arranged between the aluminum bar and the aluminum product to reduce the deformation process.
Iv. Shunt hole
The channel, shape, section size, quantity and different arrangement of aluminum through the hole directly affect the extrusion quality, extrusion pressure and service life.
The number of diverter holes should be reduced as far as possible to reduce the weld, increase the area of diverter holes and reduce the extrusion pressure.
5. Parallel bridge
Its width is related to mold strength and metal flow.
Six, the core
Determine the size and shape of the lumen.
No. 7, Welding room
A place where metals congregate and weld.
In addition, whether the die structure design is reasonable depends on its flow ratio and extrusion ratio.
Shunt ratio: the ratio of the section area of the shunt hole to the section area of the profile directly affects the extrusion resistance, forming quality and welding quality.
Extrusion ratio: the ratio of the section area of the extruder to the section area of the extruder is an important parameter to evaluate whether the extruder is suitable for the production of the extruder.