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Nitrogen Cooling for high speed extrusion of Aluminium 7020 Alloy Eng. Tommaso Pinter, ALMAX-MORI Srl (Italy) Industry Forum – 29th March 2009.

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Presentation on theme: "Nitrogen Cooling for high speed extrusion of Aluminium 7020 Alloy Eng. Tommaso Pinter, ALMAX-MORI Srl (Italy) Industry Forum – 29th March 2009."— Presentation transcript:

1 Nitrogen Cooling for high speed extrusion of Aluminium 7020 Alloy Eng. Tommaso Pinter, ALMAX-MORI Srl (Italy) Industry Forum – 29th March 2009

2 Introduction 7020 Aluminium Nitrogen Cooling Case Study Schedule (15’)

3 AssetALMAX June 2004 as Almax–Mori S.r.l. ALUMAT 1993 as Alumat S.r.l. Networked Organization Turnover16.000K euro/year – 2 production sites ExperienceDirect-Indirect Extrusion Soft and Hard Alloys Export (50%)Europe, Middle East, Africa Prod. Capacity800 dies/month Overview

4 Custom Solutions 1.Butterfly Die™ 2.Insert Die 3.Nitrogen Cooling

5 EN AW-7020 Alloy

6 Case Study 1. Process Parameters 25MN Direct Extrusion Press Specific Pressure: 72 Kg/mm 2 Alloy: EN AW 7020 Profile Application: Rail Transport Exit Temperature: Up to 620°C 2. To Improve Low Productivity Short Die Life High Scrap Percentage

7 Hot Work Tool Steel

8 Liquid Nitrogen Cooling The INCAL ® unit by MESSER provides cooling of the die by liquid nitrogen and guarantees that the nitrogen enters into the die at constant temperature and pressure. N5Nitrogen by A.T.E. UNO INFORMATICA works manually the first time a die is used to setup all the parameters. Once the parameters have been settled, all data can be stored making a “photo” of all PLC parameters to be re-used automatically for the following extrusion runs.

9 The DIE

10 Comparisons Exit temperature: 540°C Previous: Over 600°C RAM Speed: 3mm/sec Previous: 2 mm/sec 1.Without Nitrogen Cooling the mandrel Broke After 12 billets 2.With nitrogen cooling we have Incipient Cracks after 30 billets

11 Results

12 Best Practices Focus Design on Die Performance Consider Nitrogen Cooling in designing Welding Points and Web Geometry 1.Be Sure to have Liquid Nitrogen at the Die 2.Use a Nitrogen Management Software 3.Double Slot for Liquid Nitrogen to balance nitrogen flow in die and mandrel

13 Almax-Mori & Alumat Alumat S.r.l. Alumat S.r.l. Via Lisbona Ciserano (BG) Almax-Mori S.r.l. Almax-Mori S.r.l. Via Matteotti Mori (TN)


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