AN INJECTION NOZZLE HAVING A HEATED HEAD PORTION

摘要

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 th an the head portion (24). The body portion (26) has a body portion outer surfac e (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).