Patent ID: 8376470

Claim:
A method for manufacturing a toothbrush of plastic material with a resistant inner core, comprising: providing a resistant inner core; introducing said resistant inner core into a mould cavity defined by opposite footprints of a lower half-mould (S 1 ) and of an upper half-mould (S 2 ); after said step of introducing said resistant inner core into the mould cavity, coupling said lower half-mould (S 1 ) with said upper half-mould (S 2 ); and after said step of coupling said lower half-mould (S 1 ) with said upper half-mould (S 2 ), injecting molten plastic material into said mould cavity to manufacture at least part of a handle of the toothbrush, wherein said resistant inner core ( 1 ) is arranged in a respective footprint (P) of the lower half-mould (S 1 ) in contact with at least two support platforms (Q, R) for supporting said resistant inner core ( 1 ) in a proximity of a central line of the mould cavity, and wherein said upper half-mould (S 2 ) is provided with at least one ribbing (L) configured to come in contact with said metal core at least in a position between said at least two support platforms (Q, R) and in an opposite position thereto.