Injection molding machine nozzle

An injection molding machine nozzle comprising a nozzle tip, a hot runner, and a heat insulation member, wherein

• the nozzle tip includes a nozzle hole communicating with a most downstream side of a resin flow path of the hot runner and ejects molten resin from the hot runner,
• the nozzle tip is made of a material having higher heat conductivity than heat conductivity of the hot runner,
• the nozzle tip is joined to the hot runner through the heat insulation member,
• among the hot runner and the nozzle tip, only the hot runner is provided with a heater,
• a counterbored hole communicating with the resin flow path is defined on a downstream side end of the hot runner,
• the nozzle tip includes a cylinder part having the nozzle hole, and a flange part joined to a bottom surface of the cylinder part and having an opening communicating with the nozzle hole,
• the heat insulation member is composed of a cylindrical body including an outer wall in contact with the counterbored hole of the hot runner and a through-hole in contact with an outer periphery of the cylinder part of the nozzle tip,
• a first gap is provided between the flange part of the nozzle tip and the downstream side end of the hot runner, and
• a second gap capable of being filled with the molten resin is provided between a distal end of the cylinder part of the nozzle tip and an innermost part inside the counterbored hole of the hot runner.