Abstract: A control and regulating device for a needle element (24) of a hot or cold channel (20) of a plastic molding tool, wherein a rotary movement of a drive device is converted by a converting device (26) into an axial movement of the needle element (24). In order to achieve optimum plastic production, that is to say to permit optimum movement of the needle element (24) both during the idle stroke movement and also during the process regulation phase and during deceleration, the converting device has at least one slide path (30) and a follower element (50) which is guided in the slide path (30), wherein the at least one slide path (30) which is angled, that is to say which has path pitches which are different from each other, is formed on a slide path surface which is concentric with respect to the center line (42) of the needle element.