Product Overview

The PVC Material Pelletizing Machine is a complete industrial recycling and compounding system designed to convert heat-sensitive PVC waste into stable, reusable pellets.

PVC is one of the most technically challenging plastics to recycle due to its chlorine content and thermal instability. During processing, improper temperature control may lead to material degradation, discoloration, and the release of HCl gas.

Our system is engineered specifically to solve these challenges by ensuring stable plasticization, precise temperature control, and efficient degassing.

Key Challenges in PVC Recycling & Engineering Solutions

Industry Challenges

PVC recycling presents several critical technical difficulties:
Thermal degradation at high processing temperatures
HCl gas release during overheating
High moisture content in recycled PVC flakes
Poor dispersion of calcium carbonate fillers
Unstable melt flow and inconsistent pellet quality
Corrosion risk in processing equipment

Our Engineering Solutions

To address these issues, our system integrates:
Multi-zone intelligent temperature control (±1–2°C accuracy)
Vacuum degassing combined with natural venting system
Anti-corrosion treated screw and barrel system
Optimized L/D ratio design for stable PVC plasticization
High-torque gearbox for high filler PVC compounds
Stable melt pressure and extrusion control system

Working Principle

Pre-crushed PVC material is fed into the extrusion system
The screw gradually plasticizes material under precisely controlled heating zones
Vacuum system removes moisture, air, and volatile gases (including trace HCl)
Melt is homogenized and stabilized inside the barrel
PVC melt is extruded through a die head
Cooling system rapidly solidifies strands
Pelletizing system cuts strands into uniform pellets
Final drying and screening ensure consistent output quality

Engineering Advantages

PVC-specific screw design with optimized compression ratio
L/D ratio range: 25:1–36:1 for stable plasticization
Dual degassing system: vacuum + venting
Nitrided anti-corrosion screw and barrel surface treatment
High-torque gearbox for high-filler PVC compounds
Precision temperature control system (±1–2°C)
Stable extrusion performance for mixed recycled PVC materials
Energy-efficient heating system design

Production Line Configurations

Basic Pelletizing Line
Crusher → Extruder → Cooling Tank → Pelletizer → Storage

Washing & Pelletizing Line
Shredder → Crusher → Washing System → Dewatering → Extruder → Degassing → Pelletizing → Drying

Advanced PVC Recycling System
Automatic feeding → Twin-stage extrusion → Multi-vent degassing → Melt filtration → Online pellet monitoring

Technical Parameters

Screw Diameter:	65–200 mm
Output Capacity:	100–800 kg/h (customizable)
L/D Ratio:	25:1–36:1 (PVC optimized design)
Temperature Control Accuracy:	±1–2°C
Degassing System:	Vacuum + natural venting
Screw Material:	38CrMoAlA (nitrided / anti-corrosion coated)
Heating System:	Ceramic / cast aluminum heaters
Control System:	Siemens PLC (optional)
Voltage:	Customized for global markets

ROI & Business Value

Investing in a PVC pelletizing system delivers strong economic returns:

Reduce raw material cost by 30–70%
Convert industrial PVC waste into reusable raw materials
Reduce landfill and disposal expenses
Stable pellet quality enables direct reuse in production
Typical payback period: 6–18 months depending on capacity and material type

Quality Assurance & Global Support

CE / ISO certification available upon request

Full-load factory testing before shipment

Video inspection of machine operation prior to delivery

Strict quality control for screw and barrel machining

Lifetime technical support for machine operation

Global spare parts supply system

FAQ

Q: Why is PVC difficult to recycle compared to other plastics?

A: PVC is thermally sensitive and releases HCl gas when overheated, requiring precise temperature control and effective degassing systems.

Q: Can your machine process high-calcium PVC compounds?

A: Yes. The screw design is optimized for CaCO₃-filled PVC formulations and high filler content materials.

Q: How do you prevent PVC degradation during processing?

A: By controlling temperature zones precisely, optimizing residence time, and using vacuum degassing to remove volatile gases.

Q: What is the difference between single screw and twin screw PVC pelletizing machines?

A: Single screw systems are ideal for recycling applications, while twin screw systems are used for compounding and material formulation modification.

Q: Can recycled PVC pellets be reused directly?

A: Yes. High-quality pellets can be directly used in extrusion, injection molding, and pipe production.

Q: Do you provide complete recycling plant design?

A: Yes. We provide customized turnkey solutions including layout design, equipment selection, and ROI analysis.

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