Abstract: The present invention relates to a manifold unit for supplying casting material in an injection moulding system for processing thermoplastic polymers via a hot runner system with at least one needle valve nozzle which can be sealed by a shut-off needle. In this case, the shut-off needle can be moved by a hydraulic or pneumatic drive system. The needle valve nozzle has a first longitudinal axis and the drive system, which has a piston, has a second longitudinal axis, the first longitudinal axis being arranged parallel to and laterally offset from the second longitudinal axis.

Abstract: An injection-moulding tool for the production of a mould in disc form, in particular in the form of information carriers such as CDs and/or DVDs, wherein the injection-moulding tool comprises a first and a second mirror block, wherein the first and second mirror blocks lie opposite each other and are movable in relation to each other for the opening and closing of the mould, and means for actively controlling the temperature of at least one of the first and second mirror blocks. A method for producing mouldings in disc form utilizing the injection-moulding tool is also disclosed.

Abstract: An injection molding tool is described for the production of disc-like information carriers, in particular in the form of CD's and/or DVD's. The injection molding tool has a first and a second mirror block which form the cavity and which are located opposite to each other and which, for allowing an opening and a closure of the cavity, are movable relative to each other. In addition to that it has a form ring which encloses the first mirror block concentrically, and which borders the cavity towards its outer edge, and which is movable relative to the first mirror block, wherein between the first mirror block and the form ring enclosing it a sliding ring is provided for the reduction of friction if the form ring moves relative to the first mirror block.

Abstract: A method and a device for the post-processing of a disc-shaped information- and/or structure carrier for injection molding forms is described, for example for a stamper for the production of CDs or DVDs, which has a central, substantially cylindrical opening. The information- and/or structure carrier is held in the injection molding form through a holding device penetrating the opening at least partially, for example a ring-shaped stamper holder. The information- and/or structure, respectively, is provided substantially concentrically to this opening on a surface facing the cavity of the injection molding form.

Abstract: An injection molding tool is described for the production of disc-like information carriers, in particular in the form of CD's and/or DVD's. The injection molding tool has a first and a second mirror block which form the cavity and which are located opposite to each other and which, for allowing an opening and a closure of the cavity, are movable relative to each other. In addition to that it has a form ring which encloses the first mirror block concentrically, and which borders the cavity towards its outer edge, and which is movable relative to the first mirror block, wherein between the first mirror block and the form ring enclosing it a sliding ring is provided for the reduction of friction if the form ring moves relative to the first mirror block.

Abstract: The use of soft material or thinly designed tongues is made possible for fastening devices for at least one disc shaped data carrier with a central opening in a cassette, wherein the cassette comprises a middle part on which a crown of tongues is provided, elastically insertable into the central opening of the at least one data carrier, while still preventing unwanted falling out of the data carrier, for example CDs or DVDs. This is made possible in that at least one connecting element is provided, moveably connecting at least two of the tongues, wherein the connecting element is produced in the production of the fastening device in a first position and wherein after the production for increasing the restoring force of the tongues against the data carrier the connecting element is moved into a second position.

Abstract: The use of soft material or thinly designed tongues is made possible for fastening devices for at least one disc shaped data carrier (2) with a central opening in a cassette, wherein the cassette comprises a middle part (1) on which a crown of tongues (3,3′) is provided elastically insertable into the central opening of the at least one data carrier (2), while still preventing unwanted falling out of the data carrier, for example CDs or DVDs. This is made possible in that at least one connecting element (14, 14′) is provided, moveably connecting at least two of the tongues (3,3′), wherein the connecting element (14, 14′) is produced in the production of the fastening device in a first position (14) and wherein after the production for increasing the restoring force of the tongues (3,3′) against the data carrier (2) the connecting element (14, 14′) is moved into a second position (14′).

Abstract: An injection-moulding tool (10) for the production of information carriers in disc form, in particular in the form of CDs and/or DVDs, comprises for the forming of an injection mould (25) a first and a second mirror block (11 and 12, respectively), which lie opposite each other and are movable in relation to each other for opening and closing the mould and also a form ring (20), which concentrically encloses the first mirror block (11) and closes off the injection mould (25) towards the outer edge and is movable in relation to the first mirror block (11), a sliding ring (21; 21a,b,c) for reducing the friction when there is a movement of the form ring (20) in relation to the first mirror block (11) being provided between the first mirror block (11) and the form ring (20) enclosing it. The sliding ring (21; 21a,b,c) is arranged concentrically between the first mirror block (11) and the form ring (20) enclosing it.