We have deeply researched on the barrel and screw for the special engineering plastic for now much of engineering

plastics add the alcium,kaolin,red clay, silica or add Glass fiber, carbon fiber, boron fiber and halogen free plastic to

make the original plastic much better to adapt the specific plastic products.On the other hand, it may make the

screw and barrel wear and corrosion quickly, In order to solve this problem,we have invented a kind of special

alloy powder,whose ingredient contains 25~50% Wc tungsten carbide.It makes the service life of screw and barrel

much more longer than the other kinds of bimetallic screws and barrels.