A method for manufacturing a brush head (10). The method includes molding a tuft carrier (50) having at least one retention element (52) that are positioned relative to a handling plate (101). Excess material (59) may be removed from the tuft carrier. The retention elements are loaded into recesses of the handling plate. A bristle tuft (21) comprised of a plurality of bristles (22) is inserted into the opening (51) of each retention element. A proximal end (23) of each bristle tuft (21) is bonded together with at least a portion of the proximal side (53) of each corresponding retention element (52) to form a merged proximal end head portion (26) that secures the bristle tufts and retention elements together as a plurality of merged tuft assemblies (20). A platen (42) of a neck (40) is positioned in relation to the merged tuft assemblies using a cavity in a base plate. A matrix material (30) is overmolded to at least partially encompass the platen and the merged tuft assemblies and form the brush head.

A manufacturing method of a wire harness which includes at least one bundle of an electric wire group in which a plurality of electric wires are linearly arranged, and a damming part made of a resin material surrounding a part of the electric wire group in an extending direction of the electric wire group and including an outer periphery shape part according to an inner peripheral shape of an electric wire group insertion part, the manufacturing method includes a mold clamping step of disposing a part of the one bundle of the electric wire group and mold clamping an upper mold and a lower mold and an injection step of performing low pressure injection of a larger amount of molten resin than a volume of a cavity into the cavity.

A method for manufacturing a brush head (10). The method includes molding a tuft carrier (50) having at least one retention element (52) that are positioned relative to a handling plate (101). Excess material (59) may be removed from the tuft carrier. The retention elements are loaded into recesses of the handling plate. A bristle tuft (21) comprised of a plurality of bristles (22) is inserted into the opening (51) of each retention element. A proximal end (23) of each bristle tuft (21) is bonded together with at least a portion of the proximal side (53) of each corresponding retention element (52) to form a merged proximal end head portion (26) that secures the bristle tufts and retention elements together as a plurality of merged tuft assemblies (20). A platen (42) of a neck (40) is positioned in relation to the merged tuft assemblies using a cavity in a base plate. A matrix material (30) is overmolded to at least partially encompass the platen and the merged tuft assemblies and form the brush head.