Plastic Head Lumps Shredding Application: MS Single-Shaft Shredder for Efficient Size Reduction

Plastic head lumps are generated during various plastic processing operations.

Typical sources include:
• Extrusion startup waste 
• Material remaining in extrusion dies 
• Production changeovers 
• Injection molding process waste 
• Purging material 
• Other large, solid plastic lumps 

Unlike loose plastic film or small production scrap, head lumps are usually:
• Large 
• Dense 
• Irregularly shaped 
• Mechanically strong 

Their physical characteristics make them difficult to process directly with conventional high-speed granulators.
The first step is therefore to reduce their size.

The main challenge in this application is the large size and high density of the incoming plastic lumps.
A large head lump cannot always be fed efficiently into a conventional crusher.
Forcing oversized lumps directly into a high-speed granulator may also create unstable feeding and excessive mechanical load.
The MS single-shaft shredder is therefore used as the primary size-reduction equipment.

The process can be summarized as:
Large Plastic Head Lumps → MS Single-Shaft Shredding → Smaller Plastic Pieces → Subsequent Recycling Process

Large plastic lumps require substantial cutting force.
The single-shaft shredder provides:
* High Torque
The low-speed, high-torque rotor provides the force required to process dense plastic lumps.
* Controlled Feeding
The hydraulic pusher helps push the material toward the rotor.
This improves the feeding of irregularly shaped lumps.
* Coarse Size Reduction
The shredder is designed for primary size reduction rather than fine granulation.
This makes it suitable for preparing large plastic lumps for subsequent processing.

The operating process is relatively simple.

Step 1 — Material Feeding
Large plastic head lumps are loaded into the shredder hopper.
Step 2 — Hydraulic Pushing
The hydraulic pusher moves the material toward the cutting rotor.
Step 3 — Shredding
The rotor engages with the plastic lump and cuts it against the fixed counter knives.
Step 4 — Discharge
The shredded material is discharged through the screen.
The screen controls the approximate output size.

After shredding, the original large head lumps are converted into smaller plastic pieces.
The output material is significantly easier to:
• Transport 
• Store 
• Feed 
• Crush 
• Extrude 
• Pelletize 
The actual final particle size depends on the selected screen and the characteristics of the incoming plastic material.
The shredded material can therefore be used as feedstock for subsequent recycling equipment.

The complete application can be summarized as:
Plastic Head Lumps → Feeding Hopper → Hydraulic Pusher → MS Single-Shaft Shredder → Screen-Controlled Discharge → Smaller Plastic Pieces → Subsequent Recycling Process
The focus of this application is the primary size reduction stage.

The exact output size and processing capacity depend on the material characteristics and selected machine configuration.

The main value of this application is that it provides a practical solution for handling large plastic lumps that are difficult to process directly with conventional granulators.
* Handles Large Plastic Lumps
The shredder can process large and irregular plastic head lumps.
* High-Torque Size Reduction
The low-speed, high-torque rotor provides the cutting force required for dense plastic material.
* Stable Material Feeding
The hydraulic pusher helps feed irregular material into the cutting chamber.
* Prepares Material for Further Recycling
The shredded pieces are easier to feed into downstream crushing, extrusion, or pelletizing equipment.
* Flexible Output Size
The screen can be selected according to the requirements of the subsequent process.

The application can be summarized as:
Large Plastic Head Lumps → Hydraulic Forced Feeding → MS Single-Shaft Shredding → Smaller Plastic Pieces → Subsequent Crushing / Extrusion / Pelletizing

The MS shredder therefore serves as a front-end size-reduction machine, converting difficult-to-handle plastic lumps into a more manageable form for further recycling.

This application demonstrates the use of an MS Series Single-Shaft Shredder for processing plastic head lumps.
The main challenge is the large size, irregular shape, and high density of the incoming material.
Instead of feeding large lumps directly into a high-speed granulator, the MS shredder first performs controlled primary size reduction.

The process is:
Plastic Head Lumps → MS Single-Shaft Shredding → Smaller Plastic Pieces

The resulting material can then be transferred to subsequent recycling processes according to the customer's requirements.
This application therefore focuses specifically on plastic lump size reduction, rather than presenting the shredder as a complete plastic recycling system.

If your production process generates large plastic head lumps that are difficult to process with conventional granulators, ACERETECH can provide single-shaft shredding solutions for primary size reduction.
The MS Series Single-Shaft Shredder can reduce large, dense plastic lumps into smaller pieces for subsequent recycling processes.
Contact ACERETECH to discuss your plastic lump size-reduction requirements.
Plastic head lumps → MS Shredding → (Optional Crushing) → Pelletizinging → Production Reuse