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Linear motion screening machine

Our robust solution for “large and rough” requirements

Linear vibrating screen HR 13-5 50 I WS on site, i.e. installed in a system. The machine has air suspension.

The SIEBTECHNIK TEMA linear motion screening machine is used for screening and dewatering granular bulk materials. We build Linear-motion Screening Machines with drive units arranged at the top or bottom for extreme requirements. Even high temperatures of the feed material and the requirement for low residual moisture can be realized with these machines.

Operating behavior & mechanical features

SIEBTECHNIK Linear-motion Screening Machines are free-swinging machines, which means that the vibration amplitude is freely adjustable according to the mass ratio of the screen box and unbalance. Linear-motion Screening Machines can be designed with a steep (approx. 75°) or flat (approx. 40°) throw angle and are therefore flexible in the choice of screen bottom inclination from rising to horizontal to falling. Examples are dewatering screens with a 3° to 5° incline and screening machines with classifying tasks that require an incline of up to approx. 40° (thin-layer screening).

Our screening machines in the HG (double unbalance gearbox), DWS (double shaft screen) and HR (unbalance motors) series offer separation sizes from 0.5 to 300 mm and a screening surface of approx. 1 to approx. 60 m². Depending on the product, the machines can be designed for a vibration amplitude of 2 – 14 mm. The screen structure can comprise between one and three screen decks.

The speed and vibration amplitude of the linear vibratory screening machine can be varied to suit the specific product, ensuring a consistently perfect screening result.

The screen box is designed to accommodate either longitudinally or transversely tensioned screen panels or flat screen panels and, of course, system screen panels from different screen panel manufacturers.

The screen box, consisting of side walls and cross beams, absorbs all static and dynamic forces. Vibration generation is not located in the center of gravity of the screen box. Double unbalance gears or unbalance motors are mounted on a drive bridge. It is important that the resulting direction of force action passes through the center of gravity. The same applies to the position of the two drive shafts in double-shaft screening machines.

The Linear-motion Screening Machine is driven via a V-belt drive with reduction gear or via a direct drive using a cardan shaft. The double unbalance gears are oil-filled. The unbalance motors have lifetime grease lubrication. Double shaft screens are optionally lubricated with oil or grease.

The screen box is elastically supported against the substructure on 4 spring elements. Various systems of spiral compression springs, rubber buffers, vibration elements or air bellows are possible and can be combined if required (hybrid suspension).

For dusty screening material, we can supply Linear-motion Screening Machines with a dust hood or a closed dust protection box on request. Screening aids in the form of knocking devices or sprayers are available as an option – also individually adapted.

The robust design using and combining standard components ensures a high degree of flexibility and customer-oriented solutions on the one hand, and on the other hand produces machines with low-maintenance running times and a long service life.

Light blue linear vibrating screen (as a hot mineral screening machine) ready for transportation on a heavy-duty truck.
Linear vibratory screening machine HG 22-5_76-II WS - discharge side. The machine is located in the production hall and can be seen as a whole. It is a machine with 2 screen decks and yellow polyurethane screen linings.
Linear vibrating screen DWS UE 15-40-I WS on site, i.e. installed in a system
HR 13-5 50 I WS linear motion screening machine on site. View into the machine. You can see the yellow PU screen panels and washed gravel running over the screen panels.

Design variants

They are driven either by double unbalance gears (type HG, HG-E, UHG), double shaft drives (type DWS, DZS, HN) or by unbalance motors (type HR, HR-E, MHR).
We build Linear-motion Screening Machines with drive units arranged at the top or bottom for extreme requirements. This applies to wide machines (up to 5.5 m wide) or for extremely coarse-grained feed material (e.g. granite with an edge length of approx. 1.2 m). High temperatures of the feed material and the requirement for low residual moisture can also be realized with these machines.

Gearbox screens

We manufacture single and multi-deck geared screens. Different gearbox sizes allow excellent adaptation to your specific application. The balancing masses and speeds can be adjusted in stages. This allows the linear vibration amplitude and acceleration of the screen box to be optimally adapted to the process engineering requirements.
Our SIEBTECHNIK gearboxes are quick and easy to install and offer high availability of the screening machine.
We recommend this drive concept, for example, for crusher discharge screening, i.e. as a pre-screen for high feed rates or coarse separation cuts.

Double shaft screens

The drive concept of twin-shaft screens is based on the proven vibration generation of our circular vibratory machines – only in a double version.
Two bearing-mounted drive shafts with unbalances are operated in opposite directions. The resulting movement of the screen box is therefore linear – as with geared screens.
We recommend this drive concept, for example, for multi-deck screening of chippings at temperatures of up to 450°C in the production of asphalt and for vacuum dewatering of sand.

Unbalance motors

A drive with two unbalance motors can be an economical alternative to a double unbalance gearbox or double shaft solution – in terms of center of gravity in the narrow nominal width range.
Two unbalance motors are operated in opposite directions. The resulting movement of the screen box is therefore linear – as with the geared screen or double-shaft system.
These rather smaller linear vibrating screens are used, for example, in the dewatering of sand, gravel, ore, drilling mud, slag or in recycling.

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Linear vibratory screening machine for dewatering (3D animation) - Functional principle of the machine, side view
Linear vibratory screening machine for dewatering (3D animation)
3D animation of our linear vibrating screen - design as a dewatering screen for sludge
Linear vibratory screening machine for dewatering (3D animation)
Light blue linear vibrating screen (as a hot mineral screening machine) ready for transportation on a heavy-duty truck.
SIEBTECHNIK hot mineral screening machine
Linear vibrating screen DWS-UE 15-40-I WS on site, i.e. installed in the steel structure of a plant
Linear vibrating screen DWS-UE 15-40-I WS on site
HR 14-40-I FR linear vibrating screen during the factory test run in our production hall.
HR 14-40-I FR linear motion screening machine during factory test run
Linear vibrating screen HR 14-40-I FR. The machine can be seen ready for dispatch on a truck. The truck is still on our company premises in Mülheim, you can see the factory halls in the background.
Linear vibrating screen HR 14-40-I FR - Shipping
View of a linear motion screening machine HR 14-40-I FR. You can see the finger grids
Linear vibrating screen HR 14-40-I FR - Finger grid
Linear vibrating screen HR 14-40-I FR in production
Linear vibrating screen HR 14-40-I FR in production
3D view of linear motion screening machine HR 14_40_I F. You can see an installation situation in a system.
3D view of linear motion screening machine HR 14_40_I F
Linear vibrating screen HG 22,5 76-II WS Ready for dispatch on the truck
Linear vibratory screening machine HG 22,5 76-II WS - Shipping
Linear vibratory screening machine HG 22-5_76-II WS - feed side. The machine is in production, you can see the yellow polyurethane screens
Linear vibratory screening machine HG 22-5_76-II WS - Feed side
Linear vibratory screening machine HG 22-5_76-II WS - discharge side. The machine is located in the production hall and can be seen as a whole. It is a machine with 2 screen decks and yellow polyurethane screen linings.
Linear vibratory screening machine HG 22-5_76-II WS - discharge side
Linear vibrating screen for dewatering (3D animation) View from the front.
Linear vibratory screening machine for dewatering (3D animation)
Linear vibrating screen DWS UE 15-40-I WS on site, i.e. installed in a system
Linear vibrating screen DWS UE 15-40-I WS on site
Linear vibrating screen as a hot mineral screening machine in the production hall in Mülheim an der Ruhr
Linear vibratory screening machine as a hot mineral screening machine
Linear vibratory screening machine as a hot mineral screening machine
Linear vibratory screening machine as a hot mineral screening machine
Linear vibrating screen HR 13-5 50 I WS on site, i.e. installed in a system. The machine has air suspension.
Linear vibrating screen HR 13-5 50 I WS with air suspension on site
HR 13-5 50 I WS linear motion screening machine on site. View into the machine. You can see the yellow PU screen panels and washed gravel running over the screen panels.
Linear vibrating screen HR 13-5 50 I WS on site

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Light blue linear vibrating screen (as a hot mineral screening machine) ready for transportation on a heavy-duty truck.

Hot mineral Screening Machine

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Accessories for Screening Machines

Here you will find an overview of our extensive range of screening machine accessories, e.g. atomization, wear protection, drive consoles, air suspension, counter-swing frame, dust protection, double imbalance gearbox, hybrid suspension or special screen linings.

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