Abstract: A mold for manufacturing toothed sprockets for locking winding rollers of safety belts, comprising a main cavity (4) to be filled with a molten metal alloy so as to define at least one disc-shaped body (102) of a toothed sprocket (100) having a toothing (101) on a peripheral surface thereof, and a secondary cavity (6) designed to define a tailpiece (105) jutting out of the toothed disc-shaped body (102) and brought into fluid communication with the main cavity (4). The main cavity (4) comprises a deflecting element (7) extending within the cavity (4) itself for deviating the metal alloy towards the secondary cavity (6).

Abstract: A process for manufacturing toothed sprockets, comprising the steps of pressure die-casting a molten metal alloy into a runner (7) communicating with a molding cavity (6) so as to define at least one toothed sprocket (1) associated with a respective die-casting sprue; the die-casting sprue is cut off leaving a residual sprue portion (8) projecting from the sprocket (1). Subsequently the toothed sprocket (1) is turned for removing the residual sprue portion (8) projecting from the sprocket (1) itself.