Bi-metal single conical twin screw and barrel is a kind of barrel with a 2-2.5mm-thick alloy caot on the barrel inner wall which has the ability to resist abrasion,erosion and high-temperature.And its useful service life is greatly improved contrast to common nitrating barrel.Bimetal has more obvious advantages when processing PVC calcium powder high formulations and increase wear life。

The twin-screw bimetallic screw produced by our company uses a special alloy powder to spray weld the alloy on the screw flights. It can use different alloys and welding methods for different functions of the screw.