Abstract: An injection molding machine has a frame which is C-shaped viewed from the side, the legs of which are pushed apart at their free ends by the effect of the locking force, wherein the two die platens associated with the legs are thereby kept parallel, in that pivoting takes place between at least one die platen and the associated leg. According to the invention, a measuring device is provided for permanent monitoring of the rotation and distortion of the joint providing the pivoting.

Abstract: A method for supplying a selected quantity of gas to the mold of an injection molding machine utilizes two high pressure gas bottles which are connected through a pressure reducing valve to a piston reservoir for receiving a quality of the gas. The piston reservoir is hydraulically powered to supply the gas to a further piston reservoir having a smaller volume which is connected through a valve to the mold. The second piston reservoir is also hydraulically powered for supplying a selected quality of gas under a variable pressure to the mold. Gas from the mold is recycled to both reservoirs in steps.