Barrels – A cylinder that houses the screw but is more critical than you may think.

At Concor all components that make up the injection unit command our careful attention. The barrel is the pressure carrying vessel with heat transfer demands for assisting in the plasticization of the material being processed. While more straight forward in design than complex screw and tip geometries the function is equally important. Critical considerations in material selection and design of a barrel are:

• Dimensional stability of the lining alloy and backing steel
  • Straightness is all important to assure screw & tip are centered over the entire length
  • Materials are selected to withstand cyclic pressures and change in temperature from shut down to processing
  • Concor assures the straightest barrels in the industry exceeding SPI standards 
• Construction method and Alloy type 
  • Tool Steel lined and Bimetallic. Whether dedicated or custom molding once we are aware of your process requirements Concor will recommend either a tool steel lined or bimetallic barrel and apply the correct lining alloy to maximize the wear life of the barrel ID.  See chart link.  Concor stocks Reiloy bimetallic blanks at Concor for fast delivery.
  • Reline barrels. Barrels relining is a standard in our manufacturing so don’t throw out a worn barrel until you talk to us. Relined barrels perform equal to or better than the original barrel lining and are dimensionally straight and on size. Relined barrels often present an immediate cost saving over replacing with new.

 

Based on your requirements we will combine the backing steel, lining alloys and construction method to maximize the wear life of the barrel for all applications including high filled and corrosive resins.