Conical Twin Screw Extruder for PVC: High-Shear, Low-Temp Solutions

NO.86 South Pingan Road, Yingkou, Liaoning China +8615940702375 | +8615940702192 [email protected]

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High-Shear Low-Temperature Extrusion Solutions for PVC Compounds

Our advanced conical twin-screw extrusion machinery delivers optimal plasticization and thermal control when processing sensitive heat-reactive PVC formulations. The unique tapered screw design ensures high compression ratios at the feeding section and low shear stress at the discharge zone, preventing polymer thermal degradation during continuous production. Delivering continuous output rates reaching 450 kilograms per hour, this equipment maintains uniform melt pressure across complex pipe, profile, and sheet dies. Integrated energy-efficient ceramic heating zones reduce electrical consumption by 20% compared to parallel screw extruders. Operators benefit from user-friendly PLC touchscreen interfaces that store precise thermal and speed recipes, empowering plastic manufacturers to cut scrap rates below 1% while maximizing facility profitability.
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Case Study

PVC Pipe Production Expansion in Brazil

A major Brazilian municipal pipe manufacturer installed our conical twin screw extruder to expand output of rigid UPVC pressure pipes. The specialized screw profile handled high-filler calcium carbonate formulations smoothly, achieving complete material homogenization without thermal scorching. Output speeds increased by 30%, producing 400 kilograms of finished pipe hourly while maintaining strict wall thickness tolerances within sub-millimeter specifications. Power monitoring recorded a 18% decrease in kilowatt-hour consumption per ton produced. The client eliminated material discoloration issues completely, driving scrap generation down to 0.5%. The installation paid for itself in seven months, allowing the manufacturer to secure large-scale public water infrastructure contracts across South America.

High-Speed Window Profile Extrusion in Poland

A leading Polish building products factory integrated our conical twin screw extrusion system to power dual-strand window profile lines. The machine’s precise oil-cooling screw temperature regulator maintained stable melt temperatures during continuous 24-hour operation, preventing internal stress and profile warping. Line speeds surged by 25%, producing flawless high-gloss profile surfaces that passed rigid European weatherability tests. Setup changeovers between profile dies were cut by 45% using pre-programmed digital PLC processing parameters. The plant reported over $60,000 in annual utility savings due to optimized barrel heating zones. This operational success led the client to order three additional extrusion units for regional expansion.

PVC Wall Panel Manufacturing Upgrade in Indonesia

An Indonesian decorative panel producer replaced aging single-screw machinery with our conical twin screw extruder to increase wall board manufacturing capacity. The system processed low-cost raw PVC resin blends efficiently, improving melt strength and wall web rigidity across 600mm panel cross-sections. Product scrap rates dropped from 5% to under 0.8% thanks to stable head pressure control. Total production output rose by 40%, enabling the factory to meet surging regional housing demand. The client recovered their equipment investment within eight months of commissioning while expanding their decorative product portfolio with high-gloss marble UV panels that captured premium retail market share.

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Our conical twin screw extruders represent top-tier extrusion engineering designed specifically for processing rigid and flexible PVC powders into high-quality pipes, profiles, sheets, and pellets. Featuring tapered screws with specialized flight geometries, these machines achieve thorough plasticization, low-temperature extrusion, and stable melt delivery under high head pressures. Built with high-torque gearboxes, bi-metallic barrels, and internal screw oil-cooling systems, our extruders provide exceptional wear resistance when handling high-calcium carbonate compound formulations. The intuitive Siemens PLC control system allows precise multi-zone thermal management, vacuum degassing control, and synchronized downstream speed regulation. Operating with superior energy efficiency and minimal maintenance requirements, our conical twin screw extruders empower plastic manufacturers worldwide to maximize output yields, lower production costs, and produce flawless PVC products.

Frequently Asked Questions

Why is a conical twin screw extruder better for PVC than a single screw machine?

Conical twin screws provide superior shear distribution, high compression at low temperatures, and better venting for PVC powder mixes, preventing thermal degradation while handling high filler ratios efficiently.
These extruders manufacture UPVC and CPVC water pipes, electrical conduits, window profiles, wall panels, ceiling boards, edge banding, and PVC compounding pellets with high output stability.
The extruder uses multi-zone barrel heating fans, precise PID controllers, and an internal oil-recirculation cooling system inside the screws to maintain strict melt temperature stability under continuous operation.
Our bi-metallic barrels and hard-faced screws process high filler loadings from 10 to over 100 parts calcium carbonate per hundred resin parts without premature abrasive wear.

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Customer Testimonials

John Miller

This conical extruder increased our PVC pipe output by 30% while maintaining perfect wall uniformity. Barrel heating is extremely efficient, saving our factory substantial energy costs monthly.

Michael Smith

We run heavy calcium carbonate PVC profile formulas daily. The bi-metallic screw shows zero wear after a year, and scrap rates dropped below 1%. Fantastic machinery and technical support!

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Specialized Conical Screw Geometry and Deep-Venting Architecture

Specialized Conical Screw Geometry and Deep-Venting Architecture

Our conical twin screw extruders feature specialized screw profiles engineered specifically to tackle the processing challenges of polyvinyl chloride resins. The large rear screw diameter provides substantial surface contact area for rapid powder melting and compression, while the smaller front diameter delivers gentle, low-temperature metering into the die head. This tapered transition prevents localized shear heating, protecting PVC molecules from thermal degradation and color discoloration. The barrel incorporates a deep vacuum degassing port backed by a high-capacity vacuum pump, drawing trapped air, moisture, and chemical volatiles out of the molten polymer prior to extrusion. The result is a highly homogeneous melt stream that yields dense, structurally sound plastic products with immaculate surface clarity and zero internal voids.
Heavy-Duty Transmission Gearbox and Precise Thermal Control

Heavy-Duty Transmission Gearbox and Precise Thermal Control

Engineered for continuous 24-hour industrial operations, our extruders utilize heavy-duty distribution gearboxes equipped with forced oil lubrication, specialized thrust bearings, and hardened alloy gears. This robust transmission transfers high motor torque smoothly, absorbing extreme axial head pressures generated during high-viscosity PVC processing without mechanical strain. Thermal management is controlled by multi-zone ceramic heater bands paired with high-efficiency cooling blowers, maintaining barrel temperatures within precise limits. An internal screw temperature control circuit circulates heat-conductive oil through the core of each screw, preventing material sticking and ensuring consistent shear heat balance. This advanced mechanical design delivers extended equipment service life, ultra-low operating noise, and consistent volumetric throughput across years of intensive plastic manufacturing.
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