Bimetallic conical twin barrel and screw

A bimetallic conical twin barrel and screw is a type of extrusion equipment used in the plastics industry. It is specifically designed for the extrusion of PVC (polyvinyl chloride) and other rigid thermoplastics.

The barrel and screw are the key components of the extruder, responsible for melting and conveying the plastic material. In a bimetallic conical twin barrel and screw, the barrel and screw are made of two different materials. The inner surface of the barrel and the flight of the screw are made of a wear-resistant alloy, such as a high-chromium iron alloy or a nickel-based alloy. This provides excellent resistance to abrasion and corrosion, ensuring a longer service life.

The outer surface of the barrel and the core of the screw, on the other hand, are made of a high-strength and high-toughness material, such as a nitrided steel or a bimetallic alloy. This provides good mechanical strength and resistance to deformation under high pressure and temperature conditions.

The conical shape of the barrel and screw allows for better plasticization and mixing of the material, resulting in a more uniform melt. It also provides higher output rates and improved energy efficiency compared to other types of extruders.

Overall, a bimetallic conical twin barrel and screw is a durable and efficient extrusion tool specifically designed for the processing of PVC and other rigid thermoplastics.