Method for the manufacture of a relief-like profiled outer sole of a cross-linked ethylene-co-vinyl acetate (EVA) foamed with closed cells

US4396568A · kind A · utility

Assignee

• Firma Carl Freudenberg · DE

Inventors

• Rudiger Voll · Mannheim, DE
• Walter Hoche · Weinheim, DE
• Gerhard Graab · Mannheim, DE

Key dates

• Filing date: Jul 17, 1981
• Grant date: Aug 2, 1983
• Expiry date: Jul 17, 2001

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29L2031/504
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

Method for the manufacture of a relief profiled outer sole of cross-linked EVA polymer foamed with closed cells is described in which the polymer used is formed into a cross-linked, expanded tempered blank, split by at least one cut into several subblanks, and whereupon the surface of a subblank is heated and pressed to form the relief profile. The temperature gradient of the blank while it is being pressed is important for precise formation of the relief profile.