The invention relates to a mold () 1 for injection molding a workpiece to a press, the mold includes at least one first fixed half shell () and at least one second movable half shell (), the mold () 1 is significant, because at least one (2, 3) in the first and second half shells includes at least one skeleton ((, 4, 5) and at least one skeleton (). A skin (6.7) is suitable for fixation on the inner surface of the related skeleton (4.5), because each skeleton (4.5) has a pre fingerprint matching the pre fingerprint of one of the two surfaces of the molded part.Each skin (6.7) has at least one pre fingerprint on its outer surface, the shape of which complements the pre fingerprint of the related skeleton (4.5), and on its inner surface there is a fingerprint corresponding to the final shape of one of the two surfaces of the molding part.
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