How do you determine what extrusion machine to use for extruding aluminium profiles?

1.What is the relationship between the specification of the aluminium extruder and the diagonal of the cross-section of the profile?

The tonnage of the extrusion machine is calculated according to the size of the extrusion pressure,and the tonnage indicates the extrusion pressure.Commonly,there are500t,630t,800t,1000t,1200t,1800t,2500t,etc.The larger the tonnage,the larger the aluminium profile can be produced,that is,the larger the diagonal.Simply put,the largerthe extruder specification,the larger the diagonal of the aluminum profile can be produced.

2.What relationship exists between the size of the extruder and the profile?

The extruder model and the specifications of the aluminium profile are complementary,the right extruder can extrude the right range of aluminium profiles,generallyaccording to the aluminium profile load surface chart to determine the extrusion ratio,and then determine the use of aluminum extruder,the majority of the extruder isdetermined by the extrusion ratio to calculate,which also has a relationship with the requirements of the aluminium factory,for example,an aluminium profile extrusionratio calculated down to only 5-15,the design of this situation will require However,the aluminium factory has only simple requirements for the profile and asks the mouldfactory not to change the press for the design.At this point the mould factory will still do it.So nowadays designers very often design and produce moulds according to theinformation specified by the profile factory.

3.Aluminium profiles are not the same,how can we determine how large a tonnage extruder to use for production?

Extrusion machine is the main equipment for the production of aluminum profiles,the shape and size of aluminum profiles and the appearance of quality and extrusionmachine is closely related to the good or bad,there are many forms of extrusion machine classification,many enterprises in the purchase of extrusion machine,extrusionmachine models,extrusion capacity and grade to make a systematic understanding of how to determine the size of the tonnage of aluminum extrusion machine,but alsoaluminum profile manufacturers in the purchase of extrusion machine must be considered an aspect,now explain how to choose the tonnage of the extrusion machine.

According to the type of alloy to be extruded,the annual production capacity of a single machine and the maximum external diameter of the profile,we will initially select thetype of extrusion machine,and the first issue to consider for industrial aluminium profiles is how big the tonnage of the extrusion machine is.

When choosing the tonnage of the extruder,the extrusion ratio of the extruder should be calculated first.The extrusion ratio,also known as the extrusion coefficient,refers tothe ratio between the cross-sectional area of the extrusion cylinder and the total cross-sectional area of the aluminium profile,which is the main parameter used to measurethe size of aluminium alloy deformation in the production of aluminium profiles,expressed by the following equation.

λ=Ft/ZF1

where Ft denotes the cross-sectional area of the aluminium ingot after filling the extrusion barrel,expressed in mm².

ZF1 denotes the total cross-sectional area of the extruded profile,expressed in mm².

The size of the deformation of the aluminium alloy during extrusion of the aluminium profile can also be expressed in terms of the degree of deformation:e=λ-1If the extrusion process is used,there is a finite value for the extrusion ratio.The extrusion ratio λfor aluminium profiles and bars in primary extrusion should be greater than 8-12,and there is no limit on the extrusion ratio for the billets used in secondary extrusion.

The method used above to calculate the extrusion ratio is simply to use the cross-sectional area of the extruded ingot÷the cross-sectional area of the extruded profile,but canalso be calculated in other ways,i.e.the length of the extruded profile÷the length of the ingot used for extrusion.

Before determining the size of the extruder tonnage,it is also necessary to understand the shape of the section of the profile,so as to determine the size of the die,and thendetermine the structure of the die,so as to determine whether the extrusion is a hollow or solid profile,and the tonnage of the extruder required for these two differentstructural profiles is different.

There are many classifications of extrusion presses,which can be divided into small,medium,large and heavy extrusion presses according to their extrusion capacity,and theextrusion capacity of each different model of extrusion press is limited,and the extrusion capacity is usually expressed in MN,which is the tonnage,and the tonnage of the6063 aluminium extrusion press used in industrial production has the following criteria.

List of extrusion press tonnages available for extruding 6063 aluminium profiles

500 600 800 1000 1200 1350 1600 1800 2000 2400 2800 3000 3500 4000 6000 8000 10000 12500 15000 20000