Counter Die Positioning Element for Making Graphic Marks on Flat Sheets, a Mold for Making Counter Dies Containing the Positioning Element, and the Method of Embedding the Positioning Element in the Counter Die

A method of embedding a positioning element in a counter die using a mold, comprising a counter die made by an over molding process comprising following steps:

• (a) insertion of at least two rings in cavities of the mold before starting an injection cycle when the mold of an injection molding machine is open;
• (b) start of the injection cycle, in which each channel of the mold located under the cavity with the embedded ring is filled with a plastic-liquid matrix material;
• (c) adhesive bonding of the rings to the counter die is carried out by solidification of the matrix material;
• or the counter die is made by pressing includes the following steps:
• (a′) placing at least two rings in slots;
• (b′) pouring the matrix material onto the mold and covering it with a sheet of fiberglass sheet;
• (c′) placing in a heated press and making the Counter die by bonding the matrix material, at least two rings and the fiberglass sheet;
• and
• (d′) leaving the made Counter die to harden.