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Main Description
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.
Direct answer: A conical twin screw and barrel is the plasticizing core of a conical twin screw extruder. The pair conveys, mixes, melts and pressurizes PVC compound before the die. Selection must match the extruder model, screw diameter, conical geometry, center distance, barrel cooling, PVC formulation and target output.
The twin screws work together inside the barrel to provide conveying, mixing and plasticizing. In a PVC pipe, profile, board or panel line, the screw and barrel should be considered together with the mixer, feeder, die, vacuum calibration table, haul-off and cutter. A larger extruder alone does not guarantee stable product quality if the screw geometry or tooling is mismatched.
PVC pipe extrusion with a die and calibration system matched to the required diameter range.
PVC window, door and decorative profile production with the correct profile screw design.
PVC foam board, ceiling panel and other rigid PVC board applications after formula and tooling confirmation.
Replacement of worn conical screws and barrels when the original dimensions and connection details are available.
Selection Point | Required Check |
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Extruder model and screw specification | Confirm the conical dimensions, screw length, center distance and installation connections. |
PVC formula and filler ratio | Confirm the plasticizing requirement, abrasive loading and corrosion conditions. |
Product and die | Match screw design to pipe, profile, board, panel or other finished section. |
Output and process temperature | Confirm the required conveying, melting and cooling stability. |
Wear condition | Choose repair or replacement after checking screw flights, barrel bore and surface condition. |
Please provide the extruder brand and model, screw drawing or worn sample, screw length and diameter, barrel drawing, PVC material formula, calcium-carbonate or other filler ratio, target output, product drawing, surface-treatment requirement, voltage and delivery destination. These details help Winsoar recommend a compatible conical twin screw and barrel instead of a generic size.
With suitable screw geometry, die and downstream equipment, it can support PVC pipe, profile, board, panel and related rigid PVC extrusion projects. The finished product range depends on the complete line configuration.
The screw flights and barrel bore work as one plasticizing chamber. Incorrect clearance, geometry or connection dimensions can affect pressure, melting, output and wear.
A different base or surface material should be considered only after checking the polymer, filler, temperature, corrosion and wear conditions. The machine drawing and process data should be reviewed before approval.
Compare this product with the Extruder Screw and Barrel category, Twin Screw Extruder category, bi-metallic alloy screw and barrel and single screw and barrel.
Specifications
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:
Nitriding depth | 0.50mm-0.80mm |
Nitriding hardness | 900-1000HV |
Nitriding | <= Level 1 |
Surface roughness | Ra 0.4 |
Screw straightness | 0.015mm |
hardness after chrome plating | ≥950HV |
Chromium layer thickness | 0.025~0.085mm |
Factory & Shipment
