Single-Piece Vibrating Hopper with Integrated Pre-Screen

This is a common setup for a small rock crusher. The hopper, feeder floor, and pre-screen shake as one compact unit. The benefit of this type feeder is that fines can bypass the crusher and merge with crushed material on the bottom of the crusher.

The single piece vibrating hopper is suitable for a wide variety of applications. You will face challanges with dirty wet material as it can build up in the rear or clog the pre-screen grizzly rendering it useless. This type feeder is best fed with an excavataor or small wheel loader. Wide loader buckets could be a problem because you would dump material onto the screening area reducing the pre-screen effectiveness and increasing the risk of a material blockage.

Pre-Screen

This feeder setup is common in mobile rock crushing plants and has static side-walls with a vibrating floor that conveys the material forward. Also common, are optional hopper extensions to increase the hopper capacity and facilitate feeding the rock cruhsing plant from the distance. Larger rock crushing plants feature the option of either a vibrating grizzly or a fully independent active pre-screen to improve the scalping action before the crusher inlet.