An injection nozzle having a heated head portion

Details An injection nozzle having a heated head portion An injection nozzle having a heated head portion

B - Operations, Transporting

29

C

B29C 45/27 (2006.01)

Patent

CA 2475051

An injection nozzle (14) for an injection molding apparatus is provided. The injection nozzle includes a head portion (24), a body portion (26) and a heater (40). The head and body portions (24, 26) are connected to each other and together define a nozzle melt channel (28). The head portion (24) has a head portion outer surface (24a). The head portion (24) is adapted to be in contact with a molding apparatus component that is at a lower temperature than the head portion (24). The body portion (26) has a body portion outer surface (26a). A groove (50) is defined in the head portion outer surface (24a) and the body portion outer surface (26a). The heater wire (42) is positioned in the groove (50). The heater (40) is adapted to heat melt in the nozzle melt channel (28).

L'invention concerne une buse d'injection (14) destinée à un appareil de moulage par injection. Cette buse d'injection comprend une partie tête (24), une partie corps (26) et un élément de chauffage (40). Les parties tête et corps (24, 26) sont reliées l'une à l'autre et ensemble définissent un canal de matière en fusion de la buse (28). La partie tête (24) possède une surface extérieure (24a) de la partie tête. La partie tête (24) est conçue pour être en contact avec un constituant d'appareil de moulage à une température inférieure à celle de la partie tête (24). La partie corps (26) possède une surface extérieure (26a) de la partie corps. Une rainure (50) est définie dans la surface extérieure (24a) de la partie tête et dans la surface extérieure (26a) de la partie corps. Le fil de chauffage (42) est placé dans la rainure (50). L'élément de chauffage (40) est conçu pour chauffer et fondre dans le canal de matière en fusion de la buse (28).

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