Owing to advances of engineering plastics as well as applications of various fillers, reinforcements and additives, the barrels & screws treated by conventional nitriding techniques, which are used in plastic injection and extrusion molding machine, are worn-out increasingly.

Our company teams had been devoted to the techniques of centrifugal casting for many years. We produce bimetallic cylinders, which have inner layer of 1.5-2 mm thickness with  super alloy liners by imported machines. For bimetallic screw, we use special hardfacing technique to coat a layer of super alloy on the teeth of screw.

Besides, we improve the alloy materials continuously to enable the excellent wear-resistant and corrosion resistant to prolong the service life and enhance the production performance of barrels & screws.

Material: Base materials (outer layers) are alloy steels. Inner layers are Ni-Cr-W-Fe-Si-B-C super alloys.