Injection Waste Crusher
Overview
Injection Waste Crusher is used for size reduction of injection molding waste such as sprues, runners, and defective molded parts.
It converts rigid injection scrap into controlled regrind suitable for reuse in injection molding processes.
The machine is applicable in both beside-the-press recycling systems and centralized workshop recycling setups.
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Injection Molding
Injection molding facilities typically face the following operational issues:
Sprues and runners accumulate quickly and occupy production space
01
Manual pre-breaking is still used in many workshops, leading to inconsistent input size
02
Irregular particle size affects feeding stability in injection machines
03
Scrap handling is often separated from production flow, increasing handling time and labor
04
Improper crushing can lead to dust contamination in recycled material
05
Injection molding waste has distinct physical characteristics compared to general plastic scrap:
- High rigidity and thick cross-sections (sprues and runners)
- Continuous generation aligned with production cycles
- Clean material but mechanically resistant structure
Therefore, the crusher is engineered to:
- Maintain stable cutting of rigid injection waste
- Ensure consistent particle output for reprocessing
- Match production rhythm without frequent adjustment
Working Principle
Material is fed into the hopper manually or via conveyor
01
Rotor system applies controlled cutting force to reduce size
02
Screen defines final output particle size
03
Qualified regrind is discharged for reuse or storage
04
Core Engineering Features
Cutting System
Staggered rotor design ensures stable cutting performance when processing thick or irregular injection scrap, reducing uneven stress during operation.
Blade Material
Tool steel blades (D2 / SKD11) are selected for maintaining edge stability under continuous cutting loads.
Output Size Control
Interchangeable screen systems allow adjustment of regrind size based on injection molding requirements.
Safety Protection
Motor overload protection and interlocked feeding chamber are applied to ensure stable operation during continuous production.
- Automotive plastic components
- Household appliance injection molding
- Packaging and closure production
- Electronics plastic parts manufacturing
Suitable materials:
PP, PE, ABS, PS, PA, PC (depending on configuration)
Machine Selection Logic
Selection is based on production conditions rather than machine size alone:
Key factors:
Injection machine tonnage
Daily waste volume
Recycling method (beside-the-press or centralized system)
Basic configuration guideline:
Low–medium output → beside-the-press crusher
High output → centralized recycling system
Manufacturing & Quality Control
Each machine is produced under controlled engineering procedures:
CNC machining ensures structural precision
Rotor assemblies undergo dynamic balancing before assembly
Blades are heat-treated for wear resistance stability
Each unit is tested using real injection molding scrap before shipment
Testing includes:
Continuous operation stability
Cutting performance verification
Mechanical vibration check
Application Cases
Automotive manufacturer:
Integrated sprue recycling into production flow
Packaging plant:
Centralized runner crushing for uniform regrind supply
Appliance factory:
Improved material consistency through dedicated crushing setup
FAQ
We're well-known as one of the leading injection waste crusher manufacturers and suppliers in China since 1988, featured by quality products and low price. Please feel free to wholesale cheap injection waste crusher for sale here from our factory. We also accept customized orders.