92/188 Conical Twin Screw Barrel

The 92/188 conical twin-screw extruder barrel is one of the core components of a conical twin-screw extruder, primarily used for the compounding and direct molding of thermoplastics such as rigid polyvinyl chloride (UPVC) and wood-plastic composites. It is widely used in the production of pipes, sheets, profiles, plates, and granulation. The “92/188” in its name indicates that the screw’s small end diameter is 92mm and its large end diameter is 188mm, forming a conical structure that facilitates progressive compression and uniform plasticization of the material during extrusion.

Conical twin screw and barrel technical specifications:

Main Technical Parameters and Structural Features:

Materials and Processing Technology: The barrel is typically made of high-quality nitrided steel (such as 38CrMoAlA) and undergoes nitriding treatment to improve surface hardness and wear resistance. The nitriding layer depth is generally between 0.4–0.8mm, and the surface hardness can reach over 930HV, ensuring stability and lifespan during long-term operation.

Structural Form: Conical twin-screw extruders typically employ an integral barrel structure, which helps ensure coaxiality and strength, and reduces the risk of leakage. Some large-scale equipment may also adopt a segmented modular design for easier processing and maintenance.

Temperature Control and Cooling System: The barrel is equipped with a cast aluminum heater or resistance heater, providing high heating efficiency, rapid and uniform temperature rise. It also features a cooling fan or oil cooling system for precise temperature control, preventing material overheating and decomposition.

Description

Integrated Systems: Equipped with a vacuum exhaust system, effectively removing moisture and volatiles from the material, improving product quality.

The screw and barrel work in conjunction with core temperature control to enhance plasticization uniformity.

It can be connected to a variable frequency drive (VFD) motor or a DC motor to achieve stepless speed regulation, adapting to different formulations and process requirements.

Application Compatibility This specification of cylinder is commonly used in SJSZ92/188 model extruders, suitable for direct molding of PVC powder, and also supports modified plastics and recycled material processing, with a typical output range of 200–800 kg/h.