Extrusion die

An extrusion die for injecting plasticizable elastomers into a cavity of an injection-molding die mounted on a cold-channel block which, for distribution of the material plasticized in a plasticization aggregate, is arranged between the aggregate and the injection-molding die, the extrusion die comprising:

• an extrusion die body having an opening;
• a needle for closing the opening of the extrusion die, said needle comprising an extrusion-die-opening end of an insert that is displaced in the extrusion die body and has a material transport channel;
• and
• an external drive for displacement movement of the insert comprising a short-stroke cylinder that is connected with a holder ring by way of rods arranged outside of the extrusion die body, said ring surrounding the extrusion die body at a level of the insert and being mounted on the extrusion die body so that said ring can be displaced axially, wherein several bolts are arranged in the holder ring, radial to a center axis of the extrusion die, and project into a ring-shaped undercut in the insert with their ends pointing radially inward.