| 摘要 |
The invention features a moulding device (1) comprising a male element (2) and a female mandrel (3) comprising hollow cells (31) and is characterised in that said male element (2) comprises a sole plate (20), in a material less hard than that of the said metal wall or skirt (5), and embossed elements (21, 210) of predetermined shape and height, co-operating with said hollow cells (31) to form recessed patterns (41) on said metal wall or skirt (5), in a material harder than that of said metal wall or skirt (5), such that recessed patterns (41) of predetermined profile and height are obtained.
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