Bimetallic Barrels Why are bimetallic barrels used today? The today's processing of modern plastics with fillers and fibers requires modern machine equipment. In the area of the plastification process this was taken into consideration through the development of most up-to-date wear resistant systems.
Production and surface mounting of a bimetallic barrel The blank barrel is coated with an alloy (via spin casting) and then finished. Manufacturing process A bimetallic barrel starts with a steel tube. The tube is filled with a powdered metal and closed at the ends. It is then heated in a furnace (a high temperature, gas or induction furnace). The heat melts the powdered metal. The metallic melt is evenly distributed by rotation (centrifuging). The barrel is cooled under controlled conditions and is then ready for further processing. Construction of the bimetallic barrel After being centrifuged the barrel is brought to the correct internal dimension. It is then made as specified in the drawings, with the various options such as holes, flanges, threads, key ways, etc. Details of the bimetallic layer Bimetallic protective layer. When the barrel has been manufactured it passes through a final quality control where it is given the Bernex ID and serial number.
Advantages Advantages of bimetall Lower wear resulting in higher process stability Combination of wear and corrosion resistance Based on the processed plastics, the correct wear protection system is chosen. Bernex is offering you various bimetallic inlays against all types of wear: Abrasion (A110) Corrosion (C242) Combined wear of corrosion and abrasion (AC333) more information
Combination of Bernex bimetallic cylinders and screw hardfacings Depending on the cylinder and screw material properties certain combination of the two are not suitable, such as a nitrated cylinder and a tungsten carbide screw hardfacing. The enclosed PDF file is a very good overview on commen materials and the combinations possiblities with Bernex products Screw and barrel combinations
