METHOD AND PLANT FOR PRODUCING EXTRUSION BILLETS

摘要

A method and a system produces extrusion billets from scraps obtained from stamping, cutting and/or machining operations, in particular scraps made of magnesium or magnesium alloys, without subjecting these to a melting process. The system for carrying out the method is essentially composed of a storage unit for the scraps, a device for comminuting the scraps, a press for producing a round briquette, and an extruder for shaping the round briquette into a extrusion billet.

主权项

1. A method for producing extrusion billets from scraps obtained from stamping, cutting and/or machining operations, comprising,
in a first step, comminuting the scraps delivered from a storage unit and subsequently optionally mixing the comminuted scraps with uncomminuted scraps from machining operations, in a second step filling a round compression mold with the comminuted scrap or the scrap mixture and compressing the comminuted scrap or the scrap mixture to obtain a round briquette having a density of greater than 60%, in a third step heating the round briquette to a temperature above 250° C., and a fourth step introducing the round briquette which has been heated into an extruder and, under pressure, in the extruder reshaping and compressing the round billet into an extrusion billet having a density of greater than 95%.