Aluminum Extrusion
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Process Introduction

Aluminum extrusion is a process whereby a blank aluminum bar is placed into a mold cavity of the desired shape/structure and forced through (i.e., extruded) with a certain pressure and speed to obtain a section of the specified shape, size, and mechanical properties. This section is then cut to obtain a workable part, which can then be further machined or surface treated as needed.
Our standard process is as follows:
a.Die preparation – polish and clean the extrusion die, spray sufficient release agent on the die. This step is critical as it minimizes extrusion marks along the direction of the extrusion.
b.Die set-up – fix the extrusion die to the port of the extrusion machine using bolts.
c.Raw material pretreatment – heat aluminum alloy ingots to 360 - 380°C and place into the extrusion machine’s squeezing cylinder
d.Extrusion – the extrusion machine pushes the die at a speed of 0.2 - 0.4 m/min, squeezing the aluminum alloy ingot through the die hole and forming an extrusion profile.
e.Traction – traction equipment holds the starting end of the extrusion profile and works in tandem with the extrusion machine to complete the traction.
f.Cutting – cut extrusion profiles at specified lengths using a cutting machine.
g.Heat treatment – we generally perform three types of heat treatment: solution treatment, ageing treatment, quenching treatment.
h.Anodizing – we offer pre-anodizing on long extrusions up to 6 m long and final anodizing on finished aluminum parts. Below are some of our options:
  ○Chromic acid anodizing (MIL-A-8625 Type I)
  ○Sulfuric acid anodizing (MIL-A-8625 Type II)
  ○Hard anodizing (MIL-A-8625 Type III)
  ○Colors – electrolytic coloring or dying for Type II anodizing
a.Aluminum alloys:
 ○6005, 6060, 6061, 6063, 6082
b.Heat treatment types:
 ○T4, T42, T451
 ○T6, T62, T651
c.Extrusion profile size and weight
 ○Size: 350 * 350 mm
 ○Max weight per meter: 3 T
 ○MIL-A-8625 Type I
 ○MIL-A-8625 Type II
 ○MIL-A-8625 Type III
 ○Color is customizable
 ○Surface options include glossy or satin
■Finishes: sand blasting, acid / alkali etching
e.Tooling development lead time – 7-15 days; we work with you and offer DFM support before project launch
f.Low tooling cost suitable for low volume parts – our MOQ starts from 50 pcs.
 ○Spectrometer analysis on raw material
 ○Tensile/yield strength test; hardness test
 ○Dimension report
 ○Anodizing – salt spray and UV tests
 ○Surface finishing – abrasion and film thickness tests


Meco is dedicated in providing customers high quality OEM/ODM services, full quality control from product developing, to manufacturing, packaging and shipping, to satify customers' various purchasing needs. 



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