Stručni rad

SUBSTITUTION OF ZINC STEARATE IN COLD EXTRUSION PROCESSES

Wilhelm Rehbein ; Rhein Chemie Rheinau GmbH, Mannheim
Isabell Lange ; Rhein Chemie Rheinau GmbH, Mannheim
Detlef Pazdzior ; Rhein Chemie Rheinau GmbH, Mannheim

Sažetak

Cold impact extrusion is a kind of massive forming process for the mass production of hollow or solid parts in one or more stages. Next to steel, aluminium and its alloys are the most common materials used for the production of cold extruded parts. For the lubrication of the aluminium cold extrusion process, to prevent adhesion and to reduce tool wear, the application of zinc stearate is still widely used. Because zinc stearate is a powder it has to be applied on the slugs by a tumbling process which leads to a strong dust formation. Furthermore it may cause respiratory irritation; the thermal decomposition forms toxic and irritating vapours.
This paper will present the development of a new lubricant for the cold extrusion of aluminium parts based on renewable raw materials. The new lubricant is free of zinc or other metals. Because it is a waterbased suspension, it can be applied easily and without any dust formation.

Ključne riječi

cold extrusion; lubrication; zinc stearate; substitution; renewable

Hrčak ID:

150846

URI

https://hrcak.srce.hr/150846

Datum izdavanja:

23.12.2015.

Posjeta: 2.724 *