Extrusion Process - Henan Retop Industry Co., Ltd

Our extruders can produce everything from the most common large extruded profiles to some of the smallest, thinnest extruded profiles in the industry.
We can squeeze out some of the strictest tolerances. Strictly follow the ISO9001 quality control system.

Extruding Lines

Retop has 18 extrusion lines and can produce complex extrusion parts according to customer requirements. We have state-of-the-art facilities that can produce 4,000 tons of extruded aluminum with a maximum external diameter of 450mm.

Extruder Tonnage(T)	Lines	Max Circumscribed Diameter of Aluminium Profiles(mm)
500	2	70
580	5	85
920	5	125
1460	2	157
1800	2	200
2600	1	260
3600	1	350
4000	1	450

Extrusion process flow display

Heating of Billet and Mould

Hang-up The profiles on Conductive Rods

Degreasing and decontamination

Anodized Oxidation

Sealing

Solidifying

Mill Finish Processing

Mill finish is basically bare aluminium,it is the natural appearance of the aluminium,the extrusion profiles without any surface treatment as it comes from the extrusion die.it is simple products after the extrusion processing.The appearance is natural color of aluminium in sliver,as without any surface,there will be some die lines as surface texture,but without any external mechanical or chemical finishing or colouration.

Our extrusion process produces high quality mill finish aluminium.
All profiles come out smooth and uniform because of our carefully monitored production process.The extrusion dies are carefully maintained so they enhance the smoothness of the profile surface. Be free from Oil Stain, Dent, Inclusion, Scratches, Stain, Oxide Decoration, Breaks, Corrosion, Roll Marks, Dirt Streaks and other defect which will interfere with use.