Linear-motion screening machine
Our robust solution for “large and coarse” requirements
The SIEBTECHNIK linear-motion screening machine is used to screen and dewater grainy bulk goods. Drive is provided by either double unbalance gear units (type HG, HG-E, UHG), dual-shaft drives (type DWS, DZS, HN) or by unbalance motors (type HR, HR-E, MHR).
We build linear-motion screening machines with top- or bottom-mounted drive units for extreme requirements. This applies to wide machines (up to 5.5 m wide) or to extremely grainy feed material (e.g. granite with an edge length of approx. 1.2 m). Also high feed material temperatures and the demand for low residual moisture can be met with these machines.
We manufacture geared screens with one or more decks. Different gear unit sizes enable outstanding setting-up for your specific application. The balance masses and speeds can be adjusted in stages. This enables the linear vibration amplitude and acceleration of the gear box to be optimally adapted to suit the technical process requirements.
Our SIEBTECHNIK gear units are fast and easy to fit and offer high screening machine availability.
We recommend this drive concept for e.g. crusher load-relief screening, i.e. as a preliminary screen with high feed rates or coarse separating cut.
The drive concept of dual-shaft screens is based on the proven vibration generating system on our circular-motion machines – but in a dual version.
Two bearing-mounted drive shafts with unbalance masses are driven in opposite directions. The resulting action of the screen box is thus a linear one, as with geared screens.
We recommend this drive concept for e.g. the multi-deck screening of hot stone chip material at temperatures of up to 450 °C during the manufacture of asphalt and low-pressure dewatering of sand.
An economical alternative to double unbalance gear units or the dual-shaft solution is a drive provided by two unbalance motors – specifically in the area of small nominal widths.
Two unbalance motors are driven in opposite directions. The resulting motion of the screen box is therefore linear – as on the geared screen or the dual-shaft system. These largely smaller linear-motion screens are used for e.g. the dewatering of sand, gravel, ore, borehole flushing and slag or in recycling.