A molded foam is provided in which even when a force in a sliding direction is applied to another member in contact with its surface, the occurrence of a shift in position relative to the other member can effectively be prevented and the occurrence of unusual noise due to rubbing between its surface and the other member can effectively be prevented. The molded foam is formed by heating expandable resin particles filled into a foaming mold. The molded foam has a plurality of first ridges arranged in one direction and a plurality of second ridges arranged in another direction and disposed so as to intersect the first ridges, the first and second ridges being provided on the surface of the molded foam.

Device for moulding a plastic component having at least one undercut. The device (100) for moulding a plastic component (15) from a plastic comprising a dissolved gas comprises:a fixed block (1) comprising a first half-cavity (2) and a mobile block (3) comprising a second half-cavity (4), the fixed block (1) and the mobile block (3) joining along a joining plane (5) and the first and second cavities (2, 4) delimiting a moulding cavity (6) designed to receive the plastic, having a first volume (7) and having a main direction of demoulding (8),means (28) of separating the mobile block (3) from the fixed block (1), allowing the moulding cavity (6) to be changed from the first volume (7) to a second volume (9);at least one mobile insert (11) placed in the fixed block (1) bearing at least one mobile element (16, 25), thrusting means (24) urging the mobile insert (11) toward the mobile block (3), the thrusting means being configured so that the mobile insert (11) accompanies the separation of the mobile block (3) between the first (volume (7) and the second volume (9), keeping the separation between the second half-cavity (4) formed in the mobile block (3) and the mobile element or elements (16, 25) borne by the mobile insert (11) constant,means of moving the mobile element or elements (16, 25) in a secondary direction not parallel to the main direction of demoulding during complete opening.

The invention relates to a steering wheel (1), especially a leather steering wheel, comprising a steering wheel skeleton (10), a foam padding (11) surrounding the steering wheel skeleton (10) at least partially and a wrapping (12) which encompasses the foam padding (11) at least in portions, wherein adjacent longitudinal edges (13) of the wrapping (12) are covered by a profile bead (20), in particular a decorative bead (24), the profile bead (20) including at least one anchoring element (21) which is fixed directly in the foam padding (11) for fastening the wrapping (12). Moreover the invention relates to a method of manufacturing such steering wheel.