TOOTHBRUSH

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PROBLEM TO BE SOLVED : To provide an earth-friendly toothbrush capable of raising a plaque removal effect, aiming a safe and secure toothbrush to be highly operable in an oral cavity, and focusing on the recycle of a resin, and to provide its manufacturing method.SOLUTION : Bristle tufts 1a wound around bobbins 1 are put through alignment combs 4 fixed to upper and lower robots 3. The aligned brush bristle tufts 1a are grabbed by the alignment combs 4 and lifted by the upper and lower robots 3, so as to be automatically fed by sensors 2. An upper metallic mold pressure board 10 for molding is lowered so as to cover an upper metallic mold 6 for molding. In this case, a tapered pin is inserted into a guide hole 10a as a guide in order to correctly perform positioning. When the lowering of the upper metallic mold pressure board 10 for molding is completed, the resin is simultaneously injected from a resin injection device 11 through a resin injection hole 11a. The resin is correctly injected by a fixed amount by gram control.COPYRIGHT : (C)2008, JPO&INPIT