What is a Wexco High Performance "bimetallic" plasticating barrel?
An explanation
of the term "bimetallic barrel" for the processing of plastics
The term “bimetallic” indicates that two different metals are fused together
in a high-temperature furnace that subjects the two metals to temperatures of more than 2000oF (>1100oC).
Now follow Spin Casting
High revolution spinning of the white-hot cylinder fuses the inlay alloy
to the bore wall. Subsequent carefully controlled cooling creates a super-hard, highly uniform lining in the cylinder
bore that is further subjected to ultra-precise honing processes.
The finished bore lining also
known .as. "Inlay" is at least .050" [1.27 mm] thick as a standard and has
an expected utile life expectancy from one up to five years depending the composition of inlay alloy. Double and even triple inlay thicknesses are available on request for specific applications.
The
composition of inlay alloy is the science of Nanotechnology that determine the characteristics we want. If you want it more wear resistant,
we add more tungsten carbide micro spheres or nanodiamonds.
For normal multipurpose use we
recommend Series 666,
For highly abrasive materials Series 777 is the best
For High Performance with a 5 year Wear Warranty it is the Series Durocast.
If you want a more corrosion resistant bore protection
inlay we add up to 12%
molybdenum to our cobalt-nickel boron matrix rich in complex boride content.
Series 555 This inlay offers excellent corrosion resistance against
hydrochloric and other acids. It has a dual-phase microstructure with complex borides that provide excellent wear
resistance. Typical hardness range is Rockwell C 50-55 at temperatures up to 700 oF
In
severely corrosive processing environments, such as when processing Fluoropolymers, we recommend Wexco "BO22" barrels (pronounced "bee-oh 22")
as our best solution for highly corrosive processing applications.
