EREMA Haken

FILTRATION

The system that matches every requirement

 

Without efficient filtering it is not possible to obtain high quality recyclate. This applies to all application cases in plastics recycling. That is why from the very beginning, EREMA has made this quality-decisive aspect a core element of its systems.

Perfectly implemented in innovations and partially patented filtration systems. Features they all share are process consistency and maximum filtration capacity.

Clean performance. Clean melt.
EREMA filtration solutions.

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SW RTF®

The EREMA partial surface backflushing system

 

Robustness, high level of automation and highest possible availability. Available in different sizes and always with the right filtration fineness With these EREMA filtration systems it is the details that make the system really effective.

 

The way SW RTF® technology works is to clean a small surface area of the filter screen by directing a flow of clean melt from the back of the screen. A high velocity is possible at the screen due to the small surface area of screen to be flushed, resulting in optimum cleaning efficiency.

 
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Technical benefits

 
  • Large active overall screen surface enables the processing of both high levels of contamination and surge contaminants in the melt
  • Partial area backflushing with high cleaning efficiency through backflushing of individual screens
  • Two opposing screens per carrier piston for balanced power distribution
  • Lowest possible pressure fluctuations during screen changeover and backflushing

Economic benefits

 
  • Fully automatic, efficient and reliable backflushing mechanism for maximum screen service life, long screen change intervals and reduced screening costs
  • Less labour required thanks to automatic backflush control
  • High end product quality
  • Low melt loss

SW RTF®: APPLICATION RECYCLING

  • Manages surges in contamination
  • Improves homogenisation

SW RTF®: APPLICATION FIBRES

  • Ultra-fine filtration at moderate pressure levels
  • Dramatic increase in service life for spin pack units

 

SW RTF®: APPLICATION BLOWN FILM AND FLAT FILM

  • Does not interrupt production thanks to fully automatic filtration
  • Effective filtering of gel-type particles

SW RTF®: APPLICATION TUBES

  • Does not interrupt production thanks to fully automatic filtration
  • Reduces costs by allowing higher levels of recycled material to be used 

SW RTF®: APPLICATION REPELLETS/MASTERBATCH

  • High grain uniformity even during backflushing
  • Improves homogenisation

LASER FILTER

The high-performance filter system

 

The EREMA Laserfilter is a high-performance filtration system. Innovative scraper technology enables the highest possible throughputs while maintaining impressive melt quality. Specialising in high melt rates, when film-grade pellets are needed – and for tasks that cannot be solved with conventional melt filters. 

Thanks to the engineered scraper geometry design and discharge system, the filtered contaminants are removed even more quickly and more thoroughly. Maximum cleaning efficiency, the highest possible separation capacity and increased thickening are the direct result. And: the service lifetime of the screen is greatly increased.

 
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Technical benefits

 
  • Self-cleaning filter system with rotating scraper disc enables days and weeks of continuous filtration
  • Enhanced cleaning efficiency through redesign of scraper geometry and discharge system – for even faster removal of contaminants
  • Greater discharge capacity for contaminants such as paper, wood, aluminium, copper
  • Fully automatic, constant pressure operation
  • Top filtration reliability: perfectly sealed system prevents any filtered out contaminants from getting into the high-quality plastic melt

Economic benefits

 
  • Continuously high filtration performance ensures high melt throughput together with outstanding melt quality
  • Considerably higher screen service life through increased cleaning efficiency
  • Less labour required thanks to longer screen change intervals
  • Simple and fast screen disc changeover
  • Minimum melt losses through increased thickening up to 50 %

How it works

LASER FILTER

1 2 3 4
  1. MELT INLET:

    The contaminated plastic melt (1) is pressed through two laser-bored screen discs (2) in a parallel configuration
    Explanatory video

  2. SCREEN DISCS:

    The contaminated plastic melt (1) is pressed through two laser-bored screen discs (2) in a parallel configuration
    Explanatory video

  3. SCRAPER DISC:

    A scraper disc (3) rotates between them

    Explanatory video

  4. DISCHARGE SCREW:

    Their purpose is to remove the filtered contaminants from the screen immediately and forward them instantly to the coaxial discharge screw (4). Continuously, thoroughly and as quickly as possible.

    Explanatory video

 

The contaminated plastic melt (1) is pressed through two laser-bored screen discs (2) in a parallel configuration. A scraper disc (3) rotates between them. Their purpose is to remove the filtered contaminants from the screen immediately and forward them instantly to the coaxial discharge screw (4). Continuously, thoroughly and as quickly as possible.

 
 

STATIC SCREEN, ROTATING SCRAPER

Unlike many conventional filters the EREMA Laserfilter has a rotating scraper rather than a rotating screen. This is a considerable advantage in terms of the system being leak-free. The static screen is perfectly sealed and prevents any filtered out contaminants from getting into the high-quality plastic melt. This ensures maximum filtration reliability.

INNOVATIVE SCRAPER TECHNOLOGY

  • Continuous filtration over days and weeks with enhanced cleaning efficiency
  • Contaminants lifted off screen continuously and forwarded efficiently to discharge system
  • Increased discharge capacity – lowest melt losses through increased thickening
  • Considerably higher screen service life through increased cleaning efficiency
  • Top-quality scraper elements manufactured from highly wear-resistant material

MADE WITH LASER TECHNOLOGY

The centrepiece of the Laserfilter is the filter screen, which is where the name comes from. It features ultra-fine boreholes which are laser-cut into the hardened special steel of the screen discs using the very latest laser technology. A self-cleaning effect is achieved through the conical shape of the holes. 

SW Direct Flow

Efficient melt filtration. For minor contaminants.

 

Robust, reliable, efficient – the new EREMA SW Direct Flow melt filter has the merits of the EREMA SW filter technology – proven thousands of times – in its genes.

Reduce to the max

The reduction and optimisation of the filter to the key, core functions which matter in the case of applications with only minor levels of contamination means for you: strong performance with a remarkable cost/benefit ratio

Dust & co. don't stand a chance

The new EREMA SW Direct Flow melt filter has minor contaminants such as dust under perfect control. It ensures high melt quality and combines productivity with easy operation and flexibility. And, thanks to a longer service life, it helps you to save both labour and material costs.

 
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Advantages

 
  • Top melt quality
    • Careful processing of the polymer through rheologically optimised melt channels and support breaker plates: short material dwell time in the filter, short transport distances and low pressure requirement. As a result it is also possible to process very sensitive polymers with great care
    • Quality bonus through ultra-fine filtration: < 30µm filter discs possible (standard filter discs from 30 to 90µm)
  • Long screen service life, longer filter change intervals
    • Long filter service life thanks to large, open filter areas
    • Optimised flow through the screen surfaces ensures an even build-up of contaminants inside the filter and thus prolongs filter lifetime
  • Easy to use, easy to service
    • Easy and quick screen change while production is running
  • High flexibility, compact design
    • Very broad scope of application: e.g. recycling, fibre, blown film, flat film and pipe production, repelletising/Masterbatch
    • Saves space thanks to compact design
    • Variable filter unit installation position (0, 90 or 180 degrees, depending on requirements)
  • Best price/performance ratio
    • Reliable EREMA SW filter technology, reduced to the most important core functions for relatively clean applications
  • Produce continuously – even during screen changes!
    • 50% of the filter areas remain active during screen changes because material continues to pass through the second flow channel in the filter
 

IMPRESSIONS

LASER FILTER / SW RTF®

 

EREMA DOWNLOAD CENTRE

Folder

Laserfilter
SW Direct Flow
SW RTF®
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