HDPE Rigid Plastic Granulator

Product Overview

The HDPE rigid plastic granulator is a single-screw, dedicated recycling granulation machine for rigid plastic flakes, launched under the PURUI brand and manufactured in Nantong. The equipment can directly process pre‑crushed plastic fragments without requiring an additional crushing unit, enabling integrated granulation of various rigid plastic wastes such as HDPE, PP, and ABS, producing uniform and stable recycled pellets. With a capacity range of 100–2000 kg/h and a main motor power of 30–355 kW, it supports 24‑hour continuous operation. The finished pellets have impurity content ≤1% and particle size uniformity ≥95%. This mature, reliable, and cost‑effective recycling granulation machine can be customized to meet specific customer production requirements.

Technical Principle

This equipment employs a single‑screw extrusion process, designed to handle pre‑crushed rigid plastic flakes. Material is fed directly into the barrel via the hopper. The barrel is equipped with segmented ceramic heating zones for precise temperature control, combined with shear friction generated by screw rotation to ensure thorough melting and plasticization of the rigid plastics. Subsequently, the material passes through a multi‑stage filter die to remove sand, debris, and other impurities, followed by a venting system that eliminates moisture and volatile components. Finally, the molten polymer strand is water‑cooled and shaped before being cut into pellets by the pelletizing system. The entire process is seamless and highly efficient, guaranteeing consistent quality of the recycled pellets.

Core Configuration Parameters

1. Trademark/Brand: PURUI
2. Country of Origin: NANTONG
3. Screw and Barrel Material: 38CrMoAlA, bimetallic, nitrided
4. Heating Method: Electric heating, electromagnetic heating
5. Heater Material: Cast aluminum, cast copper, mica, ceramic heaters
6. Motor Brand: Siemens, ABB, Weg, or leading domestic brands
7. Pelletizing Method: Die face pelletizing, strand cutting
8. Bearing Brand: NSK, SKF, INA, FAG, or top domestic brands
9. Inverter Brand: ABB, FUJI, Delta, Siemens
10. Capacity Range: 100–2000 kg/h
11. Main Motor Power: 30–355 kW
12. Finished Pellet Impurity Content: ≤1%
13. Particle Size Uniformity: ≥95%
14. Delivery Time: 70–80 working days
15. Warranty Period: 13 months from the bill of lading date

Core Advantages

1. Mature and Stable Single‑Screw Design: Featuring a proven single‑screw architecture, this machine boasts a low failure rate, with annual downtime averaging less than 72 hours. Its production stability exceeds conventional equipment by 60%, supporting 24‑hour continuous operation and ensuring sustained, efficient production rhythms.
2. Direct Processing of Pre‑Crushed Materials: Eliminating the need for an additional crushing unit, it can directly handle pre‑crushed plastic fragments, removing the secondary handling step after crushing. This addresses common industry pain points related to inefficient process integration, streamlining workflows and boosting overall processing efficiency.
3. Wear‑Resistant Screw Extends Service Life: Constructed from 38CrMoAlA bimetallic alloy and subjected to nitriding treatment, the screw is optimized for processing hard materials, offering a normal service life exceeding two years. Compared to standard screws, this reduces replacement costs by 40%, significantly lowering equipment maintenance expenses.
4. Thorough Plasticization Ensures High‑Quality Pellets: Precise temperature control via segmented heating zones, combined with screw‑induced shear friction, ensures complete melting and plasticization of rigid plastics. Multi‑stage filtration and venting further refine the pellets, resulting in high density, impurity content ≤1%, and particle size uniformity ≥95%, delivering stable and reliable quality.
5. Low Maintenance Threshold and Outstanding Cost‑Effectiveness: Designed to align with real‑world production needs, the equipment is easy to operate and maintain, with minimal daily upkeep requirements. Coupled with its impressive capacity—up to 40 tons per day per unit—it delivers a high return on investment for businesses.

Core Product Value

1. Integrated Granulation Optimizes Processes: By eliminating the secondary handling of crushed materials, it simplifies production steps, boosts overall efficiency, and reduces labor and transportation costs.
2. Wear‑Resistant Configuration Reduces Costs and Increases Efficiency: The highly wear‑resistant screw extends service life, lowers the frequency and cost of component replacements, and minimizes downtime through stable operation, thereby enhancing enterprise productivity.
3. High‑Quality Pellets Boost Market Competitiveness: With low impurity levels and excellent size uniformity, the recycled pellets serve as premium raw material for reprocessing into new plastic products, helping companies develop competitive recycled‑pellet offerings.
4. Customizable Adaptation: Equipment can be tailored to meet specific customer production needs, flexibly matching the capabilities of enterprises of varying scales and satisfying diverse processing requirements.

Target Customer Groups

This equipment is suitable for rigid plastic recycling plants, plastic crushing facilities, manufacturers of everyday plastic products, industrial solid waste treatment companies, and recycled pellet producers—any enterprise involved in the recycling and processing of rigid plastic waste. Whether handling small‑scale scrap recycling or large‑scale mass production of recycled pellets, it can accommodate corresponding capacity demands.

Application Scenarios

The equipment is widely applicable to the recycling granulation of pre‑crushed rigid materials such as HDPE plastic bucket fragments, PE pipe scraps, PP turnover box flakes, ABS/PS industrial edge scraps, and PC engineering plastic fragments. Simply feed the pre‑crushed rigid plastic flakes directly into the machine to complete the full process—from melting and plasticization to finished pellets—making it compatible with various rigid plastic waste streams and helping enterprises achieve resource recovery from solid waste.

Solutions to Industry Pain Points

1. Addressing Inefficient Process Integration: Conventional recycling granulation processes require transferring crushed rigid materials to the granulating equipment, increasing labor costs and risking production interruptions. This machine directly interfaces with pre‑crushed materials, eliminating the transfer step and achieving efficient linkage between crushing and granulation, thus improving overall production efficiency.
2. Solving Rapid Wear of Standard Screws: Ordinary screw materials cannot withstand prolonged abrasion from rigid plastics, leading to frequent replacements and high costs. This machine features a bimetallic screw treated with nitriding, offering superior wear resistance and a normal service life exceeding two years. Replacement costs are reduced by 40%, significantly cutting equipment maintenance expenses.
3. Tackling Difficulties in Equipment Maintenance: Some granulation machines have complex structures, demanding specialized operators and regular maintenance. This machine adopts a mature single‑screw design tailored to practical production needs, making operation straightforward and daily maintenance accessible, thereby reducing both human and technical costs for enterprises.
4. Resolving Unstable Pellet Quality: Conventional equipment often produces recycled pellets with high impurity levels and poor size uniformity, failing to meet the stringent quality requirements of high‑end plastic product manufacturing. This machine employs multi‑stage filtration, precise temperature control, and thorough plasticization to ensure finished pellets with impurity content ≤1% and size uniformity ≥95%, delivering stable and reliable quality.

Common Questions FAQ

Q1: What types of plastic waste can this granulator process?
A: The equipment is compatible with pre‑crushed rigid plastics such as HDPE, PP, ABS, PS, and PC, including plastic bucket fragments, pipe scraps, turnover box flakes, and industrial edge scraps.
Q2: What is the equipment’s capacity range? Can it be customized?
A: The standard capacity range is 100–2000 kg/h, with individual units capable of producing up to 40 tons per day. Customization is available based on customers’ actual production needs.
Q3: How long is the warranty period?
A: The warranty lasts 13 months from the bill of lading date. During this period, free repairs are provided for non‑human‑caused malfunctions.
Q4: Does the equipment require an accompanying crushing unit?
A: No, this machine can directly process pre‑crushed plastic fragments without needing an additional crushing unit. It can seamlessly integrate with existing crushing equipment, optimizing the production workflow.
Q5: Which brands are used for the equipment’s key components?
A: Motors can be selected from international brands like Siemens, ABB, Weg, or leading domestic brands; bearings from NSK, SKF, INA, FAG, or top domestic brands; and inverters from ABB, FUJI, Delta, Siemens, ensuring stable and reliable operation.