Plant engineering
Recycling systems for stable material cycles.
STF develops and integrates systems for the mechanical preparation of plastic streams. From the input material through size reduction, washing, separation, sorting and conveying, the result is a process line matched to material, throughput and target quality.
Turnkey System concepts from material input to defined output
Modular Machines, conveying technology and sorting matched to the process task
Material-specific Design based on input fraction, contamination and target quality
Plant expertise
From material stream to reliable recycling line.
A good plastic recycling system is not a single aggregate. It is a clearly managed process chain in which every transfer point, every separation stage and every machine contributes to the required material objective.
Circularity
Consider input, process and output together
Material fraction, contamination, throughput and target quality determine the technical design of the individual process steps.Components
Modular technology for flexible lines
Size reduction, washing, separation, sorting, conveying and storage are combined as required and integrated into existing or new systems.Quality
Stable recyclate quality as the objective
The system is designed for a usable material stream that reliably supports downstream sorting, washing or extrusion processes.Process architecture
STF plans the line backwards from the output.
Target quality, downstream processing and available input streams determine how the system is configured. This results in solutions that not only function technically, but also remain understandable, maintainable and expandable in ongoing operation.
Material analysis Fractions, contaminants, moisture, particle sizes and target products form the basis for the design.
Mechanical robustness Machines, transfer points and conveying sections are planned for industrial loads and good accessibility.
Quality assurance Sorting, separation and process management are combined so that the output remains permanently usable.
Systems & components
The process components interlock cleanly.
Depending on input material and target quality, STF combines the appropriate building blocks. The modular design creates scope for new lines, extensions and retrofit scenarios.
Plastic reborn.
The cycle starts with a system that does not merely move material, but converts it into usable quality.
Size reduction
Pre-shredding and granulation prepare the material stream so that subsequent process steps can operate reproducibly.
Washing & preparation
Washing, friction and drying steps are matched to the material, contamination level and required residual moisture.
Separation & classification
Density, screen and air separation stabilize fractions and reduce impurities during continuous operation.
Optical sorting
Sensor technology and AI-supported sorting technology can be integrated wherever fraction purity and process protection are especially important.
Conveying & buffering
Conveying technology, bunkers and transfer points connect the process steps into a line with clear material flows.
Product components
Sorting components, washing components and process water treatment.
The components overview links to compact product pages with function, application area, technical key data and available component images. Missing visuals are deliberately marked as placeholders.
Sorting plants Image to follow
Sorting plants
Sorting modules
Modules for preparation, separation, conveying, manual quality control and sortable processing of post-consumer packaging plastics.
01 Feeding Belt Feeding Belt 02 Bale Breaker / Shredder Bale Breaker / Shredder 03 Conveyor Belts Conveyor Belts 04 Ballistic Separator Ballistic Separator 05 Vertical Bottle Conveying Screw Vertical Bottle Conveying Screw 06 Label Scraper Label Scraper 07 Starscreen Starscreen 08 Quality Control Quality Control
Washing plants Image to follow
Washing plants
Washing modules
Modules for rinsing, wet size reduction, cleaning, separation, hot washing, final rinsing and filling of plastic flakes.
01 Bottle Washer Bottle Washer 02 Wet Cutting Mill / Grinder Wet Cutting Mill / Grinder 03 Self-cleaning Friction Cleaner Self-cleaning Friction Cleaner 04 Double Air-Stream Separator Double Air-Stream Separator 05 Hot-Washer Hot-Washer 06 Separating Unit Separating Unit 07 Rinsing-Centrifuge Rinsing-Centrifuge 08 Filling Station Filling Station
Process water treatment Image to follow
Process water treatment
Process water treatment
Water circuit, filtration and zero-liquid-discharge options for washing lines with reduced fresh water demand and controlled water quality.
Material streams
Recycling technology for demanding plastic fractions.
The available system and sorting images show typical fields of work: bottle streams, mixed materials, conveying technology and sorting during ongoing operation.
Bottle and rigid-plastic streams
For PET, PE, PP and mixed fractions, the interaction between preparation, sorting and clean process management is decisive.
Heterogeneous input materials
Recycling systems must handle changing qualities while maintaining a clear process logic.
Sorting as a quality stage
Optical sorting complements mechanical preparation where material purity and target quality make the difference.
Project workflow
From the first material sample to a stable line.
The technical solution is developed step by step from the material and the required output. This makes requirements, interfaces and operating objectives visible at an early stage.
- 01
Understand the material stream
Input material, contaminants, particle sizes, target products and site conditions are jointly evaluated.
- 02
Design the process chain
The requirements are translated into a plant layout with suitable machines, transfer points, media connections and operating points.
- 03
Integrate modules
Mechanical systems, conveying technology, washing technology, separation technology and optical sorting are implemented as an overall process.
- 04
Stabilize quality
Commissioning, parameterization and service support plant operation focused on usable recyclate quality.
System expertise
Recycling systems benefit from the knowledge of the entire STF Group.
STF combines mechanical engineering, sorting technology and material understanding. This is especially valuable when systems are not considered in isolation, but as part of a cycle of preparation, quality assurance and downstream processing.
Engineering
Design based on material objective
The process chain is aligned with the material that is to be further processed or marketed at the end.
Integration
Mechanics and process from a single source
Machines, platforms, conveying technology, transfer points and operating areas are planned as an integrated plant layout.
Circularity
Interface to downstream processing
Recyclate quality, sorting and extrusion requirements are considered early so that preparation creates real added value.
Input Material stream
Process Preparation
Output Recyclate quality
Plan a plastic recycling system
Do you want to process a material stream or further develop an existing line?
Talk to STF about input material, target quality, plant layout and the next meaningful project step.