I. What are Purge Lumps? Why is Shredding and Crushing Essential?
During plastic processing operations—such as extrusion and injection molding—a significant volume of "purge lumps" is generated. This type of waste material is one of the most common, yet most challenging, materials to handle within the plastic recycling process.
In terms of material characteristics, purge lumps typically exhibit the following features:
* Large size and irregular shapes
* High density and compact structure
* Inability to be fed directly into granulation equipment
👉 Therefore, within the recycling workflow, these materials must undergo size reduction using a plastic lump shredder; this constitutes the critical first step toward achieving efficient recycling.
What problems arise if shredding is omitted?
Feeding untreated purge lumps directly into downstream equipment will trigger a series of production issues:
❌ Low granulation efficiency
❌ Significantly increased energy consumption
❌ Unstable equipment load
❌ High risk of material blockages or equipment damage
👉 What is the best way to recycle plastic purge lumps?
The optimal solution involves pre-processing the material using an industrial plastic shredder, followed by feeding it into a crushing or granulation system to ensure an efficient and stable plastic recycling workflow.
II. Comprehensive Solution: Plastic Lump Size Reduction System
To address the challenges associated with processing purge lumps, ACERETECH offers a mature and reliable solution:
👉 A Combined Shredder + Crusher System
This system is specifically designed for hard plastic recycling and represents a leading, high-efficiency solution currently prevalent within the industry.
🔄 Standard Processing Flow
Purge Lumps → Shredding (SR1400) → Crushing (GH500/800) → Uniform Flakes
Through this two-stage processing method, the system achieves:
✔ Rapid size reduction of large bulk materials
✔ Output of uniform plastic flakes
✔ Enhanced stability for downstream pelletizing operations
III. Core Equipment Configuration (Industrial Plastic Shredder & Crusher)
🔹 SR1400 Plastic Lump Shredder (Single-Shaft Shredder)
The SR1400 is a heavy-duty plastic shredder specifically designed for processing large, rigid plastic materials.
Applicable Materials Include:
HDPE / PP / ABS plastic lumps
Injection molding purge lumps
Extrusion head waste
⚙ Technical Specifications
| Shredding Chamber Dimensions |
830 × 1302 mm |
| Rotor Diameter |
400 mm |
| Screen Mesh Size | 40 mm (for rigid plastics); 80 mm (for film/sheet materials) |
| Discharge Height | 610 mm |
| Feeding System | L-type PVC conveyor belt (Width: 120 mm) |
| Electrical Components | ABB / Siemens / Schneider / Omron |
🔹 Technical Specifications
This machine is utilized to further refine materials that have undergone initial shredding, serving as a critical link in achieving high-quality plastic recycling.
🔹 Technical Specifications
| Rotor Diameter | 500 mm |
| Rotor Width | 800 mm |
| Crushing Chamber Dimensions | 485 × 800 mm |
| Screen Mesh Size | 14 mm |
| Motor Power | 37 kW |
IV. Core Technological Advantages of the Shredder
✔ Low Speed, High Torque Shredding Technology
Utilizes a Gear Drive System, featuring:
High Torque Output
Stable Operation at Low Speeds
Suitable for High-Strength Plastic Lumps
✔ Hydraulic Ram Feeding System
Integrates Load-Sensing Control:
Automatic Feeding
Anti-blocking Function
Enhances Continuous Operation Efficiency
✔ Inclined Feeding Design
Optimizes the Material's Path into the Rotor:
Boosts Feeding Efficiency
Minimizes Manual Intervention
Reduces the Risk of Material Jamming
✔ Modular Cutting System
Four-Sided Reversible Blades
Quick and Easy Replacement
Lowers Maintenance Costs
👉 Enhances the Equipment's Long-Term Operational Stability
✔ Custom Rotor Design
Provides Optimized Solutions Based on Different Materials:
HDPE Lump Shredder
PP Plastic Shredding Machine
ABS Plastic Recycling System
👉 Achieves Higher Cutting Efficiency and Throughput
✔ Hydraulic Speed Control
Adjusts Parameters Based on Varying Material Characteristics:
Regulates Ram Feeding Speed
Optimizes Shredding Performance
Improves Overall Processing Efficiency
V. Why Choose ACERETECH?
As a Professional Manufacturer of Plastic Recycling Machinery:
We Provide:
✔ Customized Solutions
✔ High-End Electrical Configurations
✔ Global After-Sales Support
✔ Stable and Durable Equipment
VI. Summary
For the Processing of Plastic Lumps (Head Stock/Purge):
👉 Choose a Professional Plastic Lump Shredder + Crusher System
This Enables:
Efficient Size Reduction
Stable Discharge
Improved Granulation Efficiency
Reduced Operating Costs
FAQ
Q1. What is the difference between a plastic shredder and a plastic crusher?
A: A plastic shredder is used for primary size reduction, handling large and bulky materials like purge lumps.
A plastic crusher (granulator) is used for secondary crushing, producing smaller and more uniform flakes.
👉 The combination of both ensures an efficient plastic size reduction system.
Q2. What is the ideal shredder for hard plastic lumps?
A: For rigid and dense materials, a low speed high torque plastic shredder is the best choice.
Machines like the SR1400 industrial plastic shredder are specifically designed for:
HDPE / PP / ABS lumps
Injection and extrusion waste
👉 Ensuring stable operation and high efficiency.
Q3. How does a hydraulic ram improve shredding performance?
A: The hydraulic ram feeding system automatically pushes material into the rotor based on load conditions.
Benefits include:
Continuous feeding
Reduced risk of blockage
Improved throughput
👉 This is essential for handling irregular plastic purge lumps.
Q4. Can this system be integrated into a full plastic recycling line?
A: Yes. This plastic shredder and crusher system can be integrated with:
Plastic washing lines
Plastic pelletizing machines
Conveyor and storage systems
👉 Forming a complete turnkey plastic recycling solution.
Q5. How to choose the right screen size for shredding and crushing?
A: Screen size depends on the material type and final application:
40 mm: suitable for rigid plastics
80 mm: suitable for film or softer materials
14 mm (crusher): for uniform flakes before pelletizing
👉 Proper screen selection ensures optimal output size and processing efficiency.