Apparecchiatura di stampaggio a iniezione a canali di colata caldi

An injection molding apparatus (1) with hot runners, comprising a rear plate that supports at least one manifold, wherein a first face (19) of the rear plate (10) that contains the main manifold (11) is in direct contact with a first face (29) of the manifold plate (20) substantially on the entire flat surface of the first face (29) of the manifold plate (20) which is not affected by the recesses (28) which, in the manifold plate, accommodate the secondary manifolds.The manifold plate has a plurality of nozzles and the actuators (26, 27) of the injection nozzles (22) are completely external to the rear plate (10), are completely inside recesses (28) of the manifold plate (20) and are arranged so that a respective piston cylinder (26) is compressed between the first face (19) of the rear plate (10) and the secondary manifold (21).