Abstract: A device for molding a buffer cap at the same time of fixing the cap to the bristle base implanting head of a toothbrush body preform. In the buffer cap molding and fixing device, a stationary molding plate is coupled to a mounting plate by a stop rod such that it is limited in its moving distance. The stationary molding plate has a plurality of sprues aligning with a plurality of gate holes. The bottom surface of the stationary molding plate has a plurality of top cavities, communicating with the sprues through their respective gates and each having a wider section provided with a pair of holding projections for holding a toothbrush body preform. The gates are formed at necks of the top cavities respectively. A back up plate is interposed between the stationary mounting plate and the stationary molding plate. A core plate comes into contact with the stationary molding plate at a parting plane. The top surface of the core plate has a plurality of bottom cavities corresponding to the top cavities.

Abstract: A device for molding a buffer cap at the same time of fixing the cap to the bristle base implanting head of a toothbrush body preform. In the buffer cap molding and fixing device, a stationary molding plate is coupled to a mounting plate by a stop rod such that it is limited in its moving distance. The stationary molding plate has a plurality of sprues aligning with a plurality of gate holes. The bottom surface of the stationary molding plate has a plurality of top cavities, communicating with the sprues through their respective gates and each having a wider section provided with a pair of holding projections for holding a toothbrush body preform. The gates are formed at necks of the top cavities respectively. A back up plate is interposed between the stationary mounting plate and the stationary molding plate. A core plate comes into contact with the stationary molding plate at a parting plane. The top surface of the core plate has a plurality of bottom cavities corresponding to the top cavities.