An injection molding tool (10) for producing disc shaped moldings comprises primary and secondary plates (11,12) arranged opposite each other, which can move relative to each other to open and close the mould, and a mould ring (20). The latter surrounds the primary plate concentrically, closes off the injection mould (25) at the outer edge, and can move relative to the primary plate. An injection molding tool (10) for producing disc shaped moldings, especially in the form of information carriers such as CD's and/or DVD's, comprises primary and secondary plates (11,12) arranged opposite each other, which can move relative to each other to open and close the mould, and a mould ring (20). The latter surrounds the primary plate concentrically, closes off the injection mould (25) at the outer edge, and can move relative to the primary plate. A tempering arrangement (26) for the mould ring is located in the ring, and tempering can be carried out electrically or by use of a tempering medium. The tempering arrangement is in the form of a channel, and a tempering medium can be supplied to it via a connection. A second arrangement (28) is used to blow the finished molding over its peripheral region after the mould has been opened.