Sprue Bushing



  • sprue bushing must be adapted to the machine nozzle used
  • exact coupling must be ensured
  • nozzle mouth almost always has to be smaller than the diameter of the sprue bushing

  • due to high forces of the nozzle contact sprue bushings are therefore made from hardened steel





  • wear of sprue bushing
  • leakage causes pressure drop and causes filling problems