An injection molding apparatus comprising: an injection nozzle; a first injection gate body having front and rear opposite sides and a first aperture extending through the first injection gate body between an injection gate outlet on the front side of the first injection gate body and an opening on the rear side of the first injection gate body; and a second injection gate body having front and rear opposite sides and a second aperture extending through the second injection gate body between an opening on the front side of the second injection gate body and an opening on the rear side of the second injection gate body, the second injection gate body comprising an inner sealing surface defining at least a portion of the second aperture and complementary to an outer sealing surface portion of the injection nozzle such that, when a portion of the injection nozzle is received in the second aperture, the outer sealing surface portion of the injection nozzle contacts the inner sealing surface of the second injection gate body to form a seal between the outer sealing surface portion of the injection nozzle and the inner sealing surface of the second injection gate body, characterized in that the first injection gate body is connectable to and disconnectable from the second injection gate body from the front side of the second injection gate body such that, when the rear side of the first injection gate body is connected in a connected position to the front side of the second injection gate body, the first aperture is adjacent the second aperture to permit the first aperture to receive at least a front portion of a nozzle tip of the injection nozzle with at least one nozzle outlet (252, 254) of the nozzle tip positioned to inject fluid through the injection gate outlet when the portion of the injection nozzle is received in the second aperture. an injection nozzle; a first injection gate body having front and rear opposite sides and a first aperture extending through the first injection gate body between an injection gate outlet on the front side of the first injection gate body and an opening on the rear side of the first injection gate body; and a second injection gate body having front and rear opposite sides and a second aperture extending through the second injection gate body between an opening on the front side of the second injection gate body and an opening on the rear side of the second injection gate body, the second injection gate body comprising an inner sealing surface defining at least a portion of the second aperture and complementary to an outer sealing surface portion of the injection nozzle such that, when a portion of the injection nozzle is received in the second aperture, the outer sealing surface portion of the injection nozzle contacts the inner sealing surface of the second injection gate body to form a seal between the outer sealing surface portion of the injection nozzle and the inner sealing surface of the second injection gate body, characterized in that the first injection gate body is connectable to and disconnectable from the second injection gate body from the front side of the second injection gate body such that, when the rear side of the first injection gate body is connected in a connected position to the front side of the second injection gate body, the first aperture is adjacent the second aperture to permit the first aperture to receive at least a front portion of a nozzle tip of the injection nozzle with at least one nozzle outlet (252, 254) of the nozzle tip positioned to inject fluid through the injection gate outlet when the portion of the injection nozzle is received in the second aperture.