DEVICE FOR PRODUCING PLASTIC MOLDED PARTS AND THE USE THEREOF

摘要

The invention relates to a device producing plastic molded parts, comprising an extruder (2) and a molding tool (4) arranged downstream of an outlet opening of the extruder, wherein a screw (5) is guided in the extruder such that it can be rotated and also axially displaced, in order to transfer liquid polymers, prepolymers or monomers located in the extruder into the molding tool. A non-return valve (10) is also arranged in the region of the free end of the screw. A locking ring (21) of the non-return valve (10) seated against the inner circumferential wall of the extruder comprises a seal (26) that is applied to at least part of the outer circumference thereof, the seal sealing the locking ring against the circumferential wall of the extruder.