pile of wet plastic fine parts

Presses for dewatering of washing line plastic rejects | fines

Plastics recycling usually begins with the shredding of waste, followed by washing. This inevitably produces wet fine fractions or rejects that are unsuitable for the next process steps of recycling (for example extrusion) – and the majority are disposed of.

When it comes to disposal, weight is a major factor in determining costs. So the drier the plastic residues are, the cheaper it is. Since there is usually still a lot of heavy liquid adhering to the material, dewatering helps. With presses from WEIMA you separate plastic from liquid in one step. The result is almost dry pressed pellets/discs. A real no-brainer for recycling companies and waste recyclers.

Presses for dewatering of washing line plastic rejects | fines Presses for dewatering of washing line plastic rejects | fines Presses for dewatering of washing line plastic rejects | fines
drained and compressed plastic rejects on discharge pipes

Our bestsellers for plastic applications

These drainage presses are currently particularly popular.

Washing plants plastic recycling rejects and fines dewatering

WEIMA presses for cost-effective disposal

Dewatering of plastic parts and rejects with WEIMA press

During wastewater treatment, smallest plastic particles are separated. These are fed into a WEIMA C.200 dewatering press.

By means of hydraulic pressure the particles are dewatered and pressed to minimize disposal costs.


Saving water.

For cleaning plastic flakes with a washing system (for example, pre-wash systems, hot-wash systems, or friction washers), a lot of water is needed, which must be treated regularly. Depending on the application, it is also necessary to control the lye content. In many systems, this is already done fully automatically.

In general, modern washing systems are highly efficient. To further optimize the water cycle, we recommend the use of our WEIMA presses. With their help, liquid adhering to rejects and fines can be separated and thus recycled – so that valuable water can remain in the cycle as long as possible.

water drains inside a metal collection bin

Drained water from plastic fines after washing line

Squeezed out liquid is pumped out via two hoses

Squeezed out liquid is pumped out

water dripping down on metal collection bin underneath puehler press

Dewatering of plastic fines after washing


Reduce transportation and disposal costs.

The calculation is simple: Every liter of water that is literally squeezed out of the plastic fine fraction with WEIMA presses reduces the waste weight. And since the disposal costs are significantly influenced by the weight, the dewatering and compaction saves cash.

man holds pressed disc made of plastic fine parts in his hands

Compressed plastic fines | rejects

recycled plastic fines disc

Compacted plastic fine parts from recycling process

Freshly pressed recycled plastic fines | rejects transported out of puehler press

Freshly pressed recycled plastic fines | rejects


Separate water from washed plastic cleanly and efficiently


Advantages compared to screw presses | screw compactors

Compact dewatering presses from WEIMA work with a hydraulically movable cylinder instead of a classic transport screw. This has a decisive advantage: wear and the associated maintenance costs are reduced to a minimum. So if you are looking for a simple and at the same time robust solution for dewatering plastic waste after the washing process, you will find it with WEIMA cylinder presses.

view inside a puehler press with round hydraulic cyclinder

Hydraulic cylinder compresses plastic parts

wet washing line plastic fine parts inside a puehler press

Wet washing line rejects ready for compaction

Washing line plastic fines dewatering process

Washing line plastic fines dewatering process

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View inside a WEIMA drainage press for better understanding of technology
WEIMA presses operating principle

Duo version for even more throughput.

For particularly high residual material quantities, WEIMA optionally offers machines in duo design. Here, two presses are combined with each other. This increases the throughput rate significantly.

two puehler press discharge pipes with plastic material

Simple and efficient draining and compressing of washing line plastic rejects

Two discharge pipes with drained plastic fines

For highest throughputs: Duo dewatering


Trial pressing – see for yourself!

We are happy to offer you the possibility to simulate your application in our facilities as realistically as possible. You have the possibility to send us your material or visit us directly in Abstatt.

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Alternatively you can send us material for testing. Click here for the form.

Hand holding wet recycling plastic fines

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