Method for Manufacturing a Brush

A method for manufacturing a toothbrush, which has a bristle carrier made of a thermoplastic material with a front side and a rear side, wherein at least one recess formed as a blind hole in the bristle carrier extends from the front side in the bristle carrier, in which recess at least one bristle is held, in which

• the at least one bristle is received in a receiving opening of a tool,
• the at least one bristle is melted to form a thickening at its attachment-side end;
• the at least one bristle is inserted with its attachment-side end into the recess;
• the distance between the tool and the bristle carrier is reduced so that the tool contacts the bristle carrier,
• the thermoplastic material is heated and, by pressing the tool against the front side of the bristle carrier, is deformed such that the thermoplastic material is displaced radially inwards into the recess, at least in the region of an edge surrounding the recess, for the form-fitting sealing of the thickening, in that a projection provided radially adjacent to the recess is pressed into the thermoplastic material, the method comprising:
• applying a tool surface provided opposite the front side of the bristle carrier and corresponding to the contour of the front side of the bristle carrier to the projection in the direction of the bristle carrier in a planar manner against the front side at the end of the relative movement between the bristle carrier and the tool.