Metal sheet or blank stamping

B - Operations – Transporting – 21 – D

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B21D 22/20 (2006.01) B21D 37/18 (2006.01) C10M 103/06 (2006.01)

Patent

CA 2066438

2066438 9103334 PCTABS00104 Ce procédé est caractérisé en ce que, avant emboutissage, on dépose sur les outils d'emboutissage ou sur la tôle un sel d'un métal alcalin choisi dans le groupe formé par Li, Na, K et d'un anion chimiquement inerte à l'égard du métal constitutif de la tôle choisi parmi les phosphates. Le dépôt de sel est préférentiellement réalisé par application sur les outils ou sur la tôle d'une solution dudit sel.

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