The use of machines in the ReWork process places high demands on quality, machine safety and hygiene standards. For this reason, we have developed drainage presses specially optimized for ReWork applications, which are HACCP-compliant and achieve the highest material throughput rates with maximum reliability. With a production of 300 mm pellets the PUEHLER G.300 ReWork achieves an output of up to 12 m³ material per hour.
ReWork presses achieve increased discharge height due to the curved discharge tube. Depending on requirements, the discharge tube can be extended up to five meters. This allows the material to be discharged directly into a container or tipping trough without the use of a conveyor belt.
The high-quality Siemens PLC control can be operated intuitively via the touch display. Parameters such as the pressing time, pressing force or the re-pressing function can be adjusted quickly and flexibly. Upstream and downstream processes can also be conveniently controlled via networking in the PROFINET system. This means that you always have your entire ReWork process safely and efficiently under control.
To produce highly compacted, almost dry discs, the material is pressed between the press ram and a slide plate. This can be moved up and down hydraulically. As soon as the disc is produced, the slide plate moves upwards and exposes the discharge pipe. Consequently, a particularly high degree of compaction is achieved at maximum throughput. The solid mechanical design is extremely maintenance-friendly and resistant to impurities as well as wear.
The hopper, into which the material to be drained is fed either manually, via a conveyor belt, or with a lifting and tipping device, can be selected in various sizes. Depending on the required buffer volume, you have the choice between 600 l, 800 l or 1,200 l. For the G.300 Duo ReWork we also offer a hopper with 2,000 l volume.
The discharge tube can be equipped with a post-cleaning device to produce cleaner discs. This rinses off any remaining product buildup from the discs. The cooling water from the oil cooling system can be used for this process.
Highest throughputs thanks to double return speed
If required, the ReWork presses can be equipped with double-pump hydraulics. This enables an increase in throughput due to the double return speed of the press stamp.
During recompaction, product residues can escape from the packaging and encounter packaging ink. To prevent these residues from contaminating the ReWork material, a second collecting tray is fitted under the discharge pipe. From there, the pressed-out material is drained off to the side and can then be disposed of effectively.
The integrated cleaning system cleans the drainage press automatically. Nozzles inside the machine clean the ReWork press at a rate of up to 20,000 l/h. The integrated software controls the process.
If required, the feed hopper can be equipped with a horizontal agitator. This prevents material bridges from forming in the hopper – a constant material feed to the pressing process is ensured.
Hygienically flawless thanks to hygienic design
Safe and clean. Thanks to the cleanable design, WEIMA drainage presses maintain food safety, meet hygiene standards, and simplify cleaning procedures. This means that down time can be minimized.
The sensors in the drain pan provide information on the fill level and regulate the pumping out of the drained material. If the drain pan or connected containers are full, not only does the ReWork press switch off automatically, but the upstream processes (conveyor belt or lifting and tipping device) are also stopped. Depending on the material requirements, a screw or radial pump discharges the drained liquid directly from the drain pan. This can then be used for ReWork purposes.
The sieve that separates the ReWork mass from the packaging is configured to suit your application. The size of the outlet holes can be between four and twelve mm. Selecting the smallest possible sieve size ensures that no fines from the packaging get into your ReWork material.
For some packages, it is necessary to open them gently before the actual drainage process to avoid uncontrolled bursting. For this purpose, two perforating rollers rotating relative to each other are located inside the feed hopper. The distance between them can be freely selected and adapted to individual requirements. This is particularly helpful for material changes.
The pre-cleaning system with special Cleaning-in-Place (CIP) piping provides reliable cleaning without having to dismantle the system or components. The press is cleaned via spray balls attached to the areas in contact with the product. The ReWork press can be optimally maintained and cleaned via five maintenance hatches.
For a long service life, machines of the G ReWork series are made of stainless steel. The machine body and the control cabinet are thus protected against heavy wear and corrosion.
The ReWork presses from WEIMA drain and compress filled disposable packaging in one step. You can efficiently dewater, separate and compress beverage cans and containers, TetraPaks, yoghurt pots, spray cans, soft packaging as well as bottles and packaging made of PET. The extracted product can then be returned to the production line in a rework process step and reused profitably.
Using a WEIMA PUEHLER G.300 ReWork draining press, overfilled or underfilled milk cartons are automatically opened and emptied in order to return the recovered milk to the production process at Emmi in Switzerland.
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