Purui Single- and Twin-Screw Combined Film Pelletizing Machine

Product Overview

The PURUI single- and twin-screw combined film pelletizing machine is a customized pelletizing equipment that balances plastic recycling efficiency with high-end modification quality. It adopts a two-step combination pelletizing line design featuring a first-stage single screw plus a second-stage twin screw, and can be tailored to meet customers’ production capacity requirements. The first-stage single screw efficiently completes coarse melting and impurity removal, while the second-stage twin screw achieves deep mixing and modification. This setup combines the high recycling processing efficiency of a single screw with the superior modification capabilities of a twin screw. Compared to pure twin-screw equipment, it reduces procurement costs by approximately 35%, offering outstanding cost-effectiveness. It is suitable for various general-purpose plastic recycling and modification needs, making it a core production device for mid-to-high-end recycled plastics enterprises as well as factories that handle both general recycling and modified production.

Technical Principle

This equipment employs a two-step process of “first-stage single-screw extrusion + second-stage twin-screw mixing” to achieve integrated production of waste plastic recycling and modification. The first-stage single screw handles the initial melting and coarse filtration of waste plastics, converting solid materials such as films, woven bags, and rigid plastics into uniform molten material, thereby significantly reducing the processing load on the second-stage twin-screw equipment. At the same time, it effectively filters out impurities in the waste, preventing them from causing wear to the second-stage core components. The molten material is directly fed into the second-stage co-rotating parallel twin screws, where strong shear and intermeshing complete deep blending, vacuum degassing, and functional modification. Various additives can be added online to upgrade material properties, ultimately producing high-quality modified recycled pellets with uniform performance through a high-precision pelletizing system. Throughout the entire process, efficient conversion from waste plastic to high-quality modified pellets is achieved.

Performance Parameters

1. Standard capacity: 100–2000 kg/h
2. Uniformity of finished pellet properties: ≥95%
3. Impurity content: ≤0.8%
4. Total motor power: 45–355 kW
5. Applicable range: Various general-purpose plastic recycling and modification needs
6. Screw and barrel material: 38CrMoAlA, bimetallic, nitrided treatment
7. Heating method: Electric heating, electromagnetic heating
8. Heater material: Cast aluminum, cast copper, mica, ceramic heaters
9. Motor brand: Siemens, ABB, Weg, or leading domestic brands
10. Pelletizing method: Die-face pelletizing, strand-cutting pelletizing
11. Bearing brand: NSK, SKF, INA, FAG, or leading domestic brands
12. Inverter brand: ABB, FUJI, Delta, Siemens
13. Delivery time: 70–80 working days
14. Warranty period: 13 months from the bill of lading date
15. Trademark/brand: PURUI
16. Place of origin: NANTONG

Core Advantages

1. Two-step process advantage: Combines the high recycling efficiency of a single screw with the excellent modification effects of a twin screw, enabling efficient handling of waste plastic recycling materials while producing high-quality modified pellets—satisfying two production needs with one machine.
2. High cost-effectiveness: Compared to pure twin-screw equipment, procurement costs are reduced by about 35%, allowing companies to gain dual recycling and modification capabilities at a lower investment, resulting in higher return on investment.
3. Strong production flexibility: Can flexibly switch between general recycling and modified material production, covering broader market demands and avoiding idle capacity issues on a single production line.
4. Protection of core components: The first-stage coarse impurity removal effectively filters out contaminants in the waste, protecting the second-stage twin-screw core components, reducing screw wear, and extending the service life of key parts.
5. Stable and reliable configuration: Core components can be selected from international top-tier brands such as Siemens, ABB, and NSK, ensuring stable operation, low failure rates, and continuous production.

Core Value of the Product

1. Cost savings: Compared to pure twin-screw equipment, procurement investments are reduced by 35%, shortening the payback period by 30% and significantly lowering enterprise equipment costs and financial pressures.
2. Broad market coverage: Simultaneously covers both the general plastic recycling and high-end modification markets, boosting product gross margins by 25% and expanding profit margins for businesses.
3. Extended equipment lifespan: After coarse filtration in the first stage, second-stage screw wear is reduced by 40%, prolonging the service life of core components and cutting down on maintenance costs and downtime.
4. Efficient production: Produces up to 48 tons of pellets per day around the clock, balancing recycling efficiency with modification quality and enhancing overall enterprise capacity and production benefits.

Target Customer Groups

Mid-to-high-end recycled plastics enterprises, factories that handle both general recycling and modified production, small and medium-sized modified plastics plants, and comprehensive resource utilization companies—these businesses not only need to process large volumes of waste plastic recycling materials but also require the production of high-quality modified pellets. This equipment perfectly matches their production scenarios.

Application Scenarios

This equipment is suitable for various plastic recycling and modification production scenarios, including integrated recycling and modification of films, woven bags, and rigid plastics; functional modification granulation of general-purpose plastics; high-end recycling and modification of PET bottle flakes; manufacturing of multi-functional recycled pellets; and small-batch production of multiple types of modified materials. Whether it’s large-scale general plastic recycling or small-batch custom production of high-end modified materials, this equipment can reliably meet production demands.

Solutions to Industry Pain Points

1. Addressing the pain point of insufficient quality in pure single-screw equipment, which cannot produce high-end modified materials: The second-stage twin screw of this equipment boasts powerful shear-mixing capabilities, enabling deep modification and producing high-quality modified pellets with property uniformity ≥95%, thus meeting high-end market demands.
2. Improving the issues of high procurement costs and low efficiency in processing recycled materials associated with pure twin-screw equipment: In the two-step design, the first-stage single screw efficiently processes recycled materials, reducing the load on the second-stage equipment, while procurement costs are 35% lower than those of pure twin-screw equipment, balancing efficiency and cost.
3. Solving the problem of a single production line being unable to handle both general and modified materials, resulting in high idle capacity rates: The equipment can flexibly switch between general recycling and modified production modes, adjusting product categories according to market demand and significantly reducing idle capacity rates.
4. Avoiding the heavy financial burden of investing in multiple pieces of equipment and long investment payback periods: One machine achieves dual functions of recycling and modification, reducing the number of equipment required, lowering procurement costs, and shortening the investment payback period by 30%, thereby alleviating financial pressure on enterprises.

Frequently Asked Questions (FAQ)

Q1: Can this single- and twin-screw combined pelletizing machine be customized?
A: Yes, this equipment is a customized product with no fixed price. It can be tailored to meet customers’ specific production capacity needs and adapt to the production requirements of enterprises of different scales.
Q2: What are the delivery time and warranty period for the equipment?
A: The delivery time is 70–80 working days, and the warranty period is 13 months from the date of the bill of lading, ensuring smooth production planning and after-sales rights for enterprises.
Q3: What types of plastic raw materials can the equipment process?
A: The equipment is compatible with various general-purpose plastic recycling and modification needs, including films, woven bags, rigid plastics, PET bottle flakes, and other types of waste plastic raw materials.
Q4: Can I choose the brands of core components?
A: Yes, core components such as motors, bearings, and inverters can be selected from international top-tier brands like Siemens, ABB, and NSK, or from leading domestic brands, catering to diverse configuration preferences of enterprises.