One of the key components to any injection molding operation is the sprue bushing. The center hole (sprue) allows for material flow from the injection nozzle to the runner system. The sprue bushing is flush mounted to the clamp plate and ensures the positive alignment and seal needed between the sprue and the injection nozzle. JBF National sprue bushings are manufactured from steel with a through hardness of 43/45 RC and have been designed and tested to operate consistently under the most strenuous situations. Contact a JBF National sales engineer today for more information.
