Injection molding apparatus

Apparatus for injecting a molten plastic material into a mold for making objects, comprising:

• a heated manifold with channels for distributing molten material inside it,
• a heated injector, for injecting molten material into a mold cavity, provided with a translatable shutter to regulate the flow of the injected molten material,
• an actuator that is attached to the manifold for receiving therefrom molten material to be sent to the injector, and comprises a body provided with
• a chamber in which a piston connected to the shutter is translatable, and
• a first conduit which has a first outlet on an external surface of the actuator and which extends from the first outlet through the thickness of the actuator body to the chamber to bring a pressurized fluid from the outside into the chamber in order to impose a reciprocating movement to the piston,
• a plate which comprises a second internal conduit for bringing the pressurized fluid to the actuator, wherein the second internal conduit has a second outlet on an external surface of the plate;
• a gap that separates the plate and the actuator at said first and second outlet,
• a joining member, distinct from the plate and the actuator, mounted to cross the gap and connect the first and second outlet.