They are among the most common machines because they are simple, relatively inexpensive to build and long lasting.
They act for the purpose of crushing the material between two”jaws”, two toothed or smooth plates in a special steel alloy, one of which is fixed, coinciding with the internal surface of a wall of the machine enclosure itself, and the other, a movable jaw, approaches and moves away from the previous one, causing the aggregates placed between the two plates to disintegrate.
The feeding takes place from above; the shaping and the convergence of the jaws facilitates the descent downwards of the material, thus sending it to areas where the distance between the plates is gradually reducing.
In this way, a progressive crushing is obtained, with a final result with a maximum size governed by the distance between the lower walls of the plates themselves. This distance is hydraulically adjustable, to the advantage of the versatility of the machine.
Are crushers intended for primary or secondary crushing. The materials produced are chipped, i.e. with the presence of edges suitable for the formation of substrates and road surfaces, fillings, drainage layers, etc.
