- A pinching-shaping device, comprising at least one pair of tools (100, 200; 100', 200') that are cylindrical, each tool presenting a central axis (X100, X200; X100', X200') around which the corresponding tool is adapted to be rotated, wherein the tools of the or each pair of tools are arranged such that the respective central axes of the tools are substantially parallel and the respective outer peripheries of the tools are applied tangentially against each other to pinch-shape a strand inserted tangentially between the tools when the tools are rotated, wherein the outer periphery of each tool is provided with blades (102, 202; 102', 202'), which radially protrude, which are successively distributed around the corresponding central axis and which each provide, on their free edge radially opposite to the central axis, a pinching surface (103, 203; 103', 203') extending between first (103A, 203A) and second (103B, 203B) ends of the pinching surface which are opposite to each other along the central axis, the respective first ends of the pinching surfaces of each tool being all located on a same first axial side (100A, 200A) of the tool, while the respective second ends of the pinching surfaces of each tool are all located on a same second axial side (100B, 200B) of the tool, opposite to the first axial side along the corresponding central axis, and wherein the pinching surface of each blade of each tool runs inclined with respect to the corresponding central axis between the first end and the second end of the pinching surface, characterized in that the blades (102, 202; 102', 202') of each tool (100, 200; 100', 200') are distributed along the outer periphery of the tool alternately between at least one first blade (102.1, 202.1; 102. 1'; 201.1'), the pinching surface of which has its first end radially further from the corresponding central axis (X100, X200; X100', X200') than its second end, and at least one second blade (102.2, 202.2; 102.2', 202. 2'), the pinching surface of which has its second end radially further from the corresponding central axis than its first end, so that each time one blade amongst the blades of a first of the two tools of the or each pair of tools is radially interposed between the two tools during the rotation of the two tools around their central axis, said one blade of the first tool is radially aligned with one of the blades of the second tool, the pinching surface of which is inclined in a complementary manner to the pinching surface of said one blade of the first tool, in order to pinch between the respective pinching surfaces of the two blades thus aligned a strand inserted tangentially between the two tools. wherein the tools of the or each pair of tools are arranged such that the respective central axes of the tools are substantially parallel and the respective outer peripheries of the tools are applied tangentially against each other to pinch-shape a strand inserted tangentially between the tools when the tools are rotated, wherein the outer periphery of each tool is provided with blades (102, 202; 102', 202'), which radially protrude, which are successively distributed around the corresponding central axis and which each provide, on their free edge radially opposite to the central axis, a pinching surface (103, 203; 103', 203') extending between first (103A, 203A) and second (103B, 203B) ends of the pinching surface which are opposite to each other along the central axis, the respective first ends of the pinching surfaces of each tool being all located on a same first axial side (100A, 200A) of the tool, while the respective second ends of the pinching surfaces of each tool are all located on a same second axial side (100B, 200B) of the tool, opposite to the first axial side along the corresponding central axis, and wherein the pinching surface of each blade of each tool runs inclined with respect to the corresponding central axis between the first end and the second end of the pinching surface, characterized in that the blades (102, 202; 102', 202') of each tool (100, 200; 100', 200') are distributed along the outer periphery of the tool alternately between at least one first blade (102.1, 202.1; 102. 1'; 201.1'), the pinching surface of which has its first end radially further from the corresponding central axis (X100, X200; X100', X200') than its second end, and at least one second blade (102.2, 202.2; 102.2', 202. 2'), the pinching surface of which has its second end radially further from the corresponding central axis than its first end, so that each time one blade amongst the blades of a first of the two tools of the or each pair of tools is radially interposed between the two tools during the rotation of the two tools around their central axis, said one blade of the first tool is radially aligned with one of the blades of the second tool, the pinching surface of which is inclined in a complementary manner to the pinching surface of said one blade of the first tool, in order to pinch between the respective pinching surfaces of the two blades thus aligned a strand inserted tangentially between the two tools.