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What is a Wobbler Feeder?

Disk feeders, known also as “wobbler” feeders, contain a number of disks mounted side by side at an appropriate distance and that rotate to carry any materials placed on them. The disk cross-section may be in the form of an ellipse, triangle or circle.

By adjusting the clearances in a wobbler feeder, it is possible to separate fine materials of various sizes before reaching the crusher, and to filter aggregate of two or even three sizes. Fine materials of different sizes passing underneath the feeder can then be directed to separate belts. Thanks to this feature, wobbler feeders both feed the crusher as a primary operation, and also sort (screen) the materials.

What is the operating principle behind Wobbler Feeders?

The triangular, elliptical or circular disks rotate synchronously, carrying the material over the feeder and separating finer materials through the bottom. As a result, a more homogenous material is provided to the following phase.

Wobbler feeders, known also as disk feeders, can be produced in sizes of 1–2 meters wide and 3–8 meters long, as required. Two or three disk feeders can be set up in sequence for longer distances.

In wobbler feeders, the disks are rotated by a powerful gearbox-governed electric motor with a single gear, although it is also possible to rotate each disk from a separate motor. If necessary, the fine aggregate that passes through the disks can be fed to the belt to form a bed for the crushed rock exiting the crusher, thus slowing the wear and tear on the rubber band.

For what processes/applications are Wobbler Feeders used?

Wobbler feeders are the most appropriate type of feeder when working with moist and sticky materials. Handling and screening moist and muddy material can be difficult, and blockages to the system can be frequent. Wobbler feeders can easily feed materials with a high moisture content to crushers.

The synchronized rotation of self-cleaning elliptical disks on circular-section disks ensures the removal of moist and sticky materials from the coarse material through compression and friction forces. Material passing through the disks can be separated or mixed with material as it exits the crusher. These feeders can manage the requirements of demanding working conditions, will also producing successful results in high-capacity facilities.

Useful tips for the maintenance and operation of disk (Wobbler) feeders.

• ·       The timely maintenance and lubrication of the motion system is important for wobbler feeders.
• ·        In these feeders, each disks is supported on both sides. The operating environment of such feeders is likely to be dirty due their suitability for moist and muddy materials. Disk bearings should be kept as clean as possible.

• ·        If each of the disks is to be rotated with a separate motor, malfunctioning disk bearings or drive systems can be replaced without stopping the feeder, although the necessary precautions should be taken to ensure occupational safety.