A plastic recycling line combines several stages of reduction, cleaning and transformation. Each one uses different cutting and wear components, so correctly identifying the function of the part avoids material and hardness errors.
Pre-shredding
Single or dual shaft shredders reduce bales, boxes, pipes and bulky parts. The main elements are rotor blades, counterblades, separators, blade holders, brackets and special hardware.
Granulation
The granulator mill uses moving and fixed blades with precise separation. The sieve controls the output size. The balance between wear resistance and toughness changes depending on whether film, PP, PE, PET, profiles or mineral-filled material is processed.
Washing and drying
In these stages, pallets, scrapers, plates and parts appear exposed to abrasion, humidity and chemicals. Selection may include stainless steels or anti-wear materials depending on the point of installation.
Compaction and pelletizing
Compactors, agglomerators and pelletizers use blades with specific geometries and reduced tolerances. A poor finish can generate heating, vibrations or irregular pellets.
Unify spare parts management
Having updated plans, references and measurements reduces downtime. We recommend recording machine, position, material, hardness and installation date of each critical part.
Sharp Industrial supplies spare parts for recycling and manufactures custom pieces when there is no reference available.
How to organize critical spare parts
Not all components require the same level of stock. Blades, screens and screws with predictable wear can be planned by the hour or ton. Supports, axles and special parts usually have lower consumption, but a longer manufacturing period. Criticality combines probability of failure, impact of stoppage and replacement time.
For each reference it is advisable to record plan, machine, position, quantity per set, material, hardness and supplier. Photographs of the assembly help avoid confusion between similar versions.
Compatibility and design improvements
A compatible part must respect dimensions and function, but can be optimized when there is a repetitive problem. It is possible to check steel, treatment, radius, finish or anti-wear coating as long as the assembly is not compromised.
Useful line indicators
- Tons processed per set of blades.
- Hours between sharpening or replacements.
- Electrical consumption per ton.
- Percentage of fines and rejection.
- Total downtime for maintenance.
Frequently asked questions
Is it advisable to use the same steel throughout the line?
No. Each stage has different impact, abrasion, temperature and corrosion. A quality suitable for the mill may not be the best for the compactor.
Can discontinued spare parts be manufactured?
Yes, based on a plan or sample, as long as geometry, material and conditions of use can be validated.
How to reduce the replacement period?
Validating plans before the need, defining minimum stock and grouping critical parts in scheduled orders reduces the risk of downtime.