Needle-valves to be inserted in a hot runner panel of an injection moulding machine for the distribution of the molten material to a plurality of dies fastened to the front of a hot runner panel and which are opened by the pressure of the molten material and closed by a spring by the releasing of the pressure. Needle & Gauge Valves The construction of the valves being so that they as a unity may be easily inserted, removed and adjusted from the backside of the hot runner panel without disassembling the dies from the moulding machine. Balance ValvesFurther the valve is provided with an adjustable abutment in an enclosed space which will not be contaminated by the molten material to ensure exact position of the needle in its open and closed position. A needle-valve for an injection moulding machine's discharge orifices to the dies,BUTTERFLY VALVES said machine having a hot runner panel, and which is closed by spring means and opened by the pressure of the molten material, comprising an axial adjustable needle mounted in a co-axial, longitudinally aligned first and second bushings for simultaneous movement, said bushings being slideably mounted in a housing, having at its forward end a screw thread stud for inserting in the backside of the machine's hot runner panel, means for inter-connecting said first bushing to said second bushing after inserting in the housing, said first bushing having at its forward end protruding abutment means, the backward end of said abutment means engaging the forward end of the housing in the retracted open position of the needle, said second bushing having at its forward end a protruding flange arranged for in the needle's extended closing position to rest with its front end against the housing and with its backside engaging the one end of spring means surrounding said second bushing, the other end of said spring means engaging a spring support longitudinally axially adjustably inserted in the housing from the backside of the same. A needle-valve for an injection moulding machine's discharge orifices to the dies, said machine having a hot runner panel, and which is closed by spring means and opened by the pressure of the molten material, comprising an axial adjustable needle mounted in a co-axial, longitudinally aligned first and second bushings for simultaneous movement, said bushings being slideably mounted in a housing, having at its forward end a screw thread stud for inserting in the backside of the machine's hot runner panel, means for inter-connecting said first bushing to said second bushing after inserting in the housing, said first bushing having at its forward end protruding abutment means, the backward end of said abutment means engaging the forward end of the housing in the retracted open position of the needle, said second bushing having at its forward end a protruding flange arranged for in the needle's extended closing position to rest with its front end against the housing and with its backside engaging the one end of spring means surrounding said second bushing, the other end of said spring means engaging a spring support longitudinally axially adjustably inserted in the housing from the backside of the same.

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