Complete Guide to Twin‑Screw Pelletizing Lines | Compounding Solutions from Nanjing Yuzun Machinery (NEOPLAS)

Complete Guide to Twin‑Screw Pelletizing Lines | Compounding Solutions from Nanjing Yuzun Machinery (NEOPLAS)

Polymer compounding factories, cable‑material producers and masterbatch manufacturers are continuously seeking reliable extrusion pelletizing equipment to boost product quality, raise hourly throughput and stabilize batch‑to‑batch consistency. Selecting a suitable twin‑screw pelletizing system directly determines production efficiency, final pellet performance and long‑term return‑on‑investment.

Nanjing Yuzun Machinery (brand: NEOPLAS) was founded in 2017. With manufacturing base located in Chaihe Industrial Park, Chuzhou City, Anhui Province, we are a full‑service manufacturer integrating R&D, mechanical design, production, assembly and after‑sales technical support. Our product portfolio covers TSB/TSH co‑rotating twin‑screw extruder series, SDJ two‑stage compounding pelletizing units, TTS triple‑screw extruder, full‑set automatic batching & feeding systems and supporting auxiliary machines. Our extrusion lines have been widely deployed across more than 20 provinces in China and exported to over 10 overseas countries including India, Indonesia, Russia, Vietnam, Turkey, Iran, Japan and South Korea.

This article classifies our main host models, explains core strengths, typical material applications, real‑world project references and key procurement considerations to help global polymer processors pick the proper pelletizing solution.

1. TSB / TSH Co‑Rotating Parallel Twin‑Screw Extruder Series

The TSB / TSH twin‑screw extruder acts as the mainstream host for general‑purpose polymer compounding. It adopts modular combinable screw‑element design, allowing flexible configuration according to different material formulas. Independent multi‑zone temperature control plus deep‑vacuum devolatilization realize uniform kneading and stable batch quality.

Core Advantages‑ Modular screw elements for flexible process adjustment
‑ Powerful shear & outstanding dispersive mixing performance
‑ Good self‑wiping screw surface to reduce material residual
‑ Segmented precise temperature control and high‑efficiency vacuum devolatilization

Typical ApplicationsModified plastics, color masterbatch, biodegradable materials, functional masterbatch, PE sheath compound, filled compound, halogen‑free flame‑retardant material, UV‑crosslinking and silane cross‑linkable cable compounds.

Available models range from lab‑scale TSB‑36 up to large‑capacity TSH‑115 for mass continuous production, covering small‑batch R&D, pilot testing and full‑scale factory manufacturing scenarios.

2. SDJ Two‑Stage Twin‑Screw + Single‑Screw Pelletizing Unit

Many thermally‑sensitive polymers such as PVC, XLPE and halogen‑free flame‑retardant cable compounds suffer degradation, yellowing or scorching under high single‑stage shear conditions. The SDJ two‑stage system solves this pain‑point by adopting T‑shaped two‑level layout: the first‑stage twin‑screw completes intensive mixing and plasticizing; the second‑stage low‑speed single‑screw builds extrusion pressure with low‑shear processing.

Core Advantages‑ Separate mixing and pressure‑building processes to suppress thermal degradation of heat‑sensitive materials
‑ Independent parameter adjustment for each stage for higher process flexibility
‑ Higher continuous throughput for large‑volume devolatilization requirements

Typical ApplicationsPVC cable compound, XLPE cross‑linked material, halogen‑free flame‑retardant cable granules, shielding compound, shoe‑sole foaming compound and rubber post‑treatment processing.

3. TTS Parallel Triple‑Screw Extruder

Our TTS triple‑screw extruder increases internal barrel free volume by 35 % compared with twin‑screw machines of equal diameter. It delivers superior distributive mixing and stronger powder feeding capacity, solving common bottlenecks such as poor powder feeding and uneven mixing for high‑loading formulations.

Core Advantages‑ Larger free volume for improved powder intake capacity
‑ Better dispersion effect for high‑concentration pigment & high‑fill systems
‑ Higher torque and output; favorable self‑cleaning performance

Typical ApplicationsHigh‑fill modified plastics, high‑concentration color masterbatch, PVC cable compound, semiconductor shielding material and other high‑powder‑content formulations.

4. Supporting Auxiliary Systems & Spare‑Parts Supply

A qualified pelletizing production line relies not only on the extruder host, but also on matched auxiliary equipment. Nanjing Yuzun Machinery provides complete one‑stop supporting solutions:

1. Automatic gravimetric batching system: Handles powder, pellet and liquid additives; closed conveying reduces dust pollution; realizes whole‑line interlinked automatic production.

2. Loss‑in‑weight feeding unit: Pellet feeder, powder feeder and liquid feeder ensure accurate ingredient metering.

3. Post‑processing units: Material conveying, mixing, cooling, dehydration, vibrating screening and automatic pellet packaging equipment.

4. Electrical control system: Optional standard instrument control or high‑end multi‑language PLC / PCC touch‑screen system with remote‑operation expandability.

5. Spare‑parts service: In‑stock supply for screw elements, shafts, barrels, heater bands, die‑face hot‑cut assemblies and electrical components; custom spare‑parts for old‑model extruders are also supported.

Real‑World Project Cases

Case 1: Cable Manufacturer in Mumbai, India

The local large‑scale cable producer required stable silane cross‑linkable A / B two‑component pelletizing. We delivered SDJ95‑250 two‑stage unit for A‑material and TSH‑65 twin‑screw extruder for catalytic B‑material. Equipped with large‑capacity loss‑in‑weight feeders and Siemens PLC control system, the line effectively prevented pre‑crosslinking and scorching risks. Final pellets show uniform granularity and low moisture content and have fully passed customer site acceptance.

Case 2: Yaxing Cable Group, Hebei, China

For this large‑size cable enterprise, we delivered a one‑drag‑two automatic batching and UV irradiation pelletizing complete line. Multiple raw materials are proportioned accurately via loss‑in‑weight metering system, then diverted into two TSH twin‑screw extruders for synchronous compounding and pelletizing. The solution greatly improved batch consistency for large‑volume cable‑material production.

Key Points When Sourcing Twin‑Screw Pelletizing Equipment

1. Match host type to your material characteristics: Choose standard TSB/TSH twin‑screw for general modification and masterbatch; select SDJ two‑stage unit for heat‑sensitive cable‑grade compounds; adopt TTS triple‑screw for ultra‑high‑fill and high‑pigment‑loading formulations.

2. Define target hourly output and running mode: Confirm whether you need intermittent batch production or 24‑hours continuous full‑load operation, to correctly determine model size, motor power and auxiliary‑system configuration.

3. Pay attention to complete‑line matching: Feeder capacity, vacuum devolatilization ability and downstream pelletizing auxiliaries must match the maximum throughput of main extruder.

4. Evaluate supplier technical capacity: Confirm if the supplier can provide screw‑element layout suggestion, process debugging service and overseas after‑sales support.

5. Spare‑parts availability: Prefer manufacturers with sufficient spare‑parts inventory, which shortens downtime in case of component wear or failure.

FAQ

Q1: Are you a real manufacturing factory or trading company?

A1: Nanjing Yuzun Machinery (NEOPLAS) is a professional manufacturer with independent R&D team and two production bases located in Anhui Chuzhou and Hebei Xingtai. We complete the whole workflow including design, machining, assembly and pre‑test inside our factory.

Q2: Can you customize the whole pelletizing production line according to our raw‑material formula and workshop layout?

A2: Yes. Our engineering team evaluates your material properties, required output and site condition, then provides tailored layout drawing and equipment configuration proposal.

Q3: What after‑sales service can you offer for overseas projects?

A3: We supply operation manuals, video guidance; we provide 48‑hour priority technical response. On‑site commissioning and operator training can be arranged upon request. Spare‑parts can be delivered by international courier.

Q4: Do you supply extruder spare‑parts separately?

A4: Yes. We provide screw elements, spline shafts, barrels, hot‑cut assemblies, heaters and electrical spare‑parts, supporting both our own machines and some third‑party extruder models.

Conclusion

From lab‑scale trial production to large‑capacity industrial compounding, twin‑screw pelletizing equipment determines the core competitiveness of polymer manufacturers. TSB/TSH twin‑screw, SDJ two‑stage and TTS triple‑screw extruder each target different material processing challenges.

Nanjing Yuzun Machinery (NEOPLAS) focuses on turn‑key extrusion pelletizing solutions for cable‑material, masterbatch and modified‑plastic producers worldwide. If you are planning new production‑line investment or equipment upgrading, feel free to send us your material list, target output and site requirements. Our engineering team will give you free technical evaluation and quotation.

www.yuzunextruder.com
Nanjing Yuzun Machinery Technology Co., Ltd.