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1. (WO2017182338) METHOD FOR MANUFACTURING AN ENGRAVED METAL SHEET FOR A COMPOSITE PRODUCT AND SUCH AN ENGRAVED METAL SHEET

Pub. No.:    WO/2017/182338    International Application No.:    PCT/EP2017/058708
Publication Date: Fri Oct 27 01:59:59 CEST 2017 International Filing Date: Wed Apr 12 01:59:59 CEST 2017
IPC: B44B 5/00
B29C 45/14
Applicants: CONSTELLIUM ROLLED PRODUCTS SINGEN GMBH & CO.KG
Inventors: PLATTE, Ralf
SAURY, Laurent
KULAS, Mary-Anne
AFSET, Andreas
Title: METHOD FOR MANUFACTURING AN ENGRAVED METAL SHEET FOR A COMPOSITE PRODUCT AND SUCH AN ENGRAVED METAL SHEET
Abstract:
A first subject matter of the invention consists of method for manufacturing an engraved metal sheet having undercuts (2, 2'), said metal sheet (1) being suitable for the mechanical attachment of a thermoplastic polymer (3), characterised in that it comprises: a) a step of mechanical engraving of a metal sheet in which first engraving tool, applied by pressure against a first main surface of the metal sheet, has a pattern in relief to produce an engraved sheet carrying the negative impression (4, 4') of said pattern in relief; b) a step of crushing the metal sheet (1) thus engraved to produce one or more undercuts (2, 2') in said negative impression (4, 4') of said pattern in relief. Another subject matter of the invention is an engraved metal sheet obtainable by the method according to the invention as well as a composite product comprising said engraved metal sheet and a thermoplastic polymer, the engraved metal sheet and (1) the polymer (3) being mechanically fixed to each other.