Conical Twin Screw And Barrel for Twin Screw Extruder

The conical twin screw and barrel assembly represents a type of twin-screw equipment utilized in the field of polymer processing; it features an intermeshing, counter-rotating configuration characterized by a large diameter in the feeding section and a smaller diameter in the homogenization section, thereby facilitating the forced conveyance of materials. This equipment is suitable for the processing of plastics—such as PVC and polyolefins—and its applications have expanded into other sectors, including explosives and wood-plastic composites.

The core application focus of the conical twin-screw extruder lies in the molding of heat-sensitive materials and high-pressure processing operations.

Its primary application scenarios are concentrated within the PVC processing sector, encompassing the extrusion molding of PVC-U pipes, profiles, and sheets, as well as the production of foamed PVC products. Counter-rotating conical twin-screw extruders are frequently employed for processing rigid PVC. In municipal pipeline engineering, the PVC-M pipes produced by this equipment exhibit a ring stiffness of ≥8 kN/m², thereby meeting the rigorous strength requirements of municipal infrastructure projects.

The high-pressure, stable conveying characteristics of the conical twin-screw extruder make it well-suited for specialized fields, such as the processing of wood-plastic composites. Furthermore, conical co-rotating twin-screw extrusion technology is specifically applicable to the extrusion molding of blended wood-plastic products.

Benefiting from the advantage of requiring minimal material input, micro conical twin-screw extruders are utilized in precision processing scenarios such as laboratory-scale polymer synthesis, the preparation of pharmaceutical co-crystals, and solvent-free reactions. Micro conical twin-screw blending extruders and micro injection molding machines—which require an initial batch input of less than 5 grams—are widely employed in undergraduate laboratory instruction.

Conical co-rotating twin-screw extrusion technology has achieved industrialized application in various areas, including plastic granulation and profile extrusion. The specific power consumption of this technology is approximately 0.07 kW/(kg·h), representing a reduction in energy consumption compared to traditional equipment.

Specification: 

Model: 

Φ45/97

Φ51/105

Φ55/113

Φ65/132

Φ80/155

Φ92/188

Φ115/225
Base material:

1)38CrMoAlA(JIS SACM645)
2)42CrMo(AISI 4140)

Process:

Heat treatment

Nitriding treatment

Technical Parameters: