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Sieving

Sieving With Vibration

For plant operations that require the highest possible purity of powders, coarse materials or liquids, sieving or screening is a method frequently used to separate and remove large particles. Vibration sieve equipment performs this task effectively because it maximises flow, including through screens and mesh. As a result, product quality is enhanced and throughput is optimised, positively impacting profitability.

At NetterVibration, we produce high-quality vibration equipment engineered to perform a wide range of industrial tasks, from screening or sieving impurities from materials to thoroughly mixing a variety of substances. For more information on how our products can contribute to your company’s profitability, call +44 1543 278981.

Separating Large and Small Rocks in Gravel

One of our customers in the construction industry was working with gravel consisting of rocks of varying sizes, which needed to be separated into groups of large and small rocks while conveying the gravel from one station in the process to the next.

The customer purchased a KRD-FL 80-350 closed trough and sieve with dual outlets, one for larger rocks and one for smaller rocks. The sieve is driven by a NTK 85 NF pneumatik linear vibrator connected via series FlexiLink. During processing, the smaller rocks fell through the openings of the sieve and were conveyed through one outlet, while the larger rocks stayed on top of the mesh and were conveyed through the other outlet.

Products used in this case study
  • KRE 25 120 mit Sieb und Elektro-Außenvibratoren von NetterVibration
    Customised Conveyors and Dosing Systems

    Feeders for conveying lettuce, dosing dry fruits, sieving gravel, and more. Whatever your product and application may be, we design a totally customized feeder adapted to your needs.

  • Druckluft-Kolbenvibrator NTK von NetterVibration
    Series NTK Pneumatic Linear Vibrators

    The pneumatic linear vibrators of the series NTK are especially suitable for conveying and compacting bulk material, due to the completely linear vibration. The linear vibration is produced by a freely oscillating, self-reversing piston.

  • FlexiLink von NetterVibration
    Series FlexiLink Resonance Conveyor System

    The resonance conveyor system of the series FlexiLink consists of a pneumatic linear vibrator of the series NTK, blade springs and the FlexiLink connecting element. This system uses the natural resonance of the springs in order to convey bulk materials.

  • Blattfedern von NetterVibration
    Blade Springs

    Conveyor systems transferring low weight loads quick and easy to assemble with combinations of our blade springs. These include, among other things, transport chutes, conveyor troughs for dosing and sieves.

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Separating and cleaning the seeds from the fruit

In the food industry, crushed rosehip fruits are separated from the seeds, the seeds then have to be freed from hairs and other material.

Our solution for a renowned jam manufacturer: customised vibrating sieves. Depending on the available space, the electric vibrators of the series NEG can be mounted on the side or below the trough. In addition, a pneumatic turbine vibrator of the series NCT ensures consistent vibration directly on the sieve mesh, so that the sieve holes are unblocked and the process runs smoothly.  

The added value for the customer: Thanks to the bespoke vibrating sieve trays, the customer is able to use most of the rosehip fruit and maximise their production of jams, paste and oils.

Products used in this case study
  • KRE 25 120 mit Sieb und Elektro-Außenvibratoren von NetterVibration
    Customised Conveyors and Dosing Systems

    Feeders for conveying lettuce, dosing dry fruits, sieving gravel, and more. Whatever your product and application may be, we design a totally customized feeder adapted to your needs.

  • [Translate to English:] Serie NEG Drehstrom Elektro-Außenvibratoren
    Series NEG 3-Phase Electric External Vibrators

    Electric external vibrators of the series NEG are used whenever, for example conveyor chutes or sieves need to be driven. In addition, these devices can loosen material blockages adhesion in silos. The 3-phase NEG units run at 750, 1,000, 1,500 or 3,000 min-1 with a 230/400 V, 50 Hz power supply.

  • Serienübersicht NCT Druckluft-Turbinenvibrator von NetterVibration
    Series NCT Pneumatic Turbine Vibrators

    Pneumatic turbine vibrators of the series NCT are particularly suitable for moving bulk materials. They can be used for emptying containers and big bags, driving chutes, sieves and vibrating tables and for the mechanical stimulation of processes.

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Separating Large and Small Plastic Particles

A NetterVibration customer in the plastics manufacturing industry was working with plastic granulates of different sizes. In order to process the material quickly and efficiently, the customer needed to separate the granulate pieces by size as it was conveyed.

The customer purchased a Netter KRE 25-120 closed trough and sieve with dual outlets, one for larger particles and one for smaller particles. They then installed two Netter NEG 25210 electric external vibrators to the equipment. During processing, the smaller granulates fell through the openings of the sieve and were conveyed through one outlet, while the larger pieces stayed on top of the mesh and were conveyed through the other outlet.

Products used in this case study
  • KRE 25 120 mit Sieb und Elektro-Außenvibratoren von NetterVibration
    Customised Conveyors and Dosing Systems

    Feeders for conveying lettuce, dosing dry fruits, sieving gravel, and more. Whatever your product and application may be, we design a totally customized feeder adapted to your needs.

  • [Translate to English:] Serie NEG Drehstrom Elektro-Außenvibratoren
    Series NEG 3-Phase Electric External Vibrators

    Electric external vibrators of the series NEG are used whenever, for example conveyor chutes or sieves need to be driven. In addition, these devices can loosen material blockages adhesion in silos. The 3-phase NEG units run at 750, 1,000, 1,500 or 3,000 min-1 with a 230/400 V, 50 Hz power supply.

  • Druckfedern von NetterVibration
    Coil Springs Made of Stainless Steel

    Feeders, vibrating tables and discharge troughs need a flexible support, which can be achieved by installing our coil springs.

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Increasing Efficiency by Eliminating Blockages

A NetterVibration customer working with large amounts of wood chips was experiencing difficulty completely unloading the trucks delivering the material. Once the wagon silo was turned over the container, the wood chips passed through a sieve grate that prevented the largest pieces from falling into the container. However, the large wood chips tended to block the flow through the grate openings, causing them to build up. The small chips were also very likely to accumulate on the grate. As a result, workers were required to manually break up the blockages.

The customer purchased and installed a Netter NTP 48 B pneumatic piston vibratorThe vibration eliminated the accumulation of small pieces and allowed the smaller wood chips to flow through, while leaving the large pieces on top of the grate. This in turn substantially reduced downtime because workers no longer had to manually break up the blockages.

Products used in this case study
  • Druckluft-Kolbenvibrator NTP Übersicht von NetterVibration
    Series NTP Pneumatic Linear Vibrators

    The pneumatic linear vibrators of the series NTP are especially suitable for knocking off material adhering to container walls in funnels, containers, silos and hoppers. Special features of NTP vibrators are: impacts like a rubber hammer or vibration with high peak acceleration.

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Breaking Up Lumps Caused by Moisture

A NetterVibration customer working with a bulk solid that tends to retain small amounts of moisture, like salt or lime, needed to process the material so that the lumps that had formed would be broken apart. These lumps varied in size, requiring that the process be adaptable to these varying conditions.

Using a vibrating table VTR 6-6 that is driven by 2 NEG 25930 electric vibrators, the customer began processing these bulk solids through a series of three vibrating sieves with progressively smaller mesh widthsThe resulting output of this process was material that has only smaller and softer lumps that can then be processed with a normal sieve assembly.

Also, because the grates in this sieve must be cleaned frequently, the sieve grates are fixed in place using quick-release latches.

Products used in this case study
  • Customised Vibrating Tables

    Whatever your requirements, our team of engineers will offer you a solution meeting your expectations, we are happy to put our 70 years of experience and expertise to work for you and design the right solution for your business

  • [Translate to English:] Serie NEG Drehstrom Elektro-Außenvibratoren
    Series NEG 3-Phase Electric External Vibrators

    Electric external vibrators of the series NEG are used whenever, for example conveyor chutes or sieves need to be driven. In addition, these devices can loosen material blockages adhesion in silos. The 3-phase NEG units run at 750, 1,000, 1,500 or 3,000 min-1 with a 230/400 V, 50 Hz power supply.

  • Druckfedern von NetterVibration
    Coil Springs Made of Stainless Steel

    Feeders, vibrating tables and discharge troughs need a flexible support, which can be achieved by installing our coil springs.

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