A well-known Italian manufacturer of vibrating screens wanted to move into the construction of nutation screen.
Nutation screens use external anti-torque tie rods to balance them as they move. The customer sent us a sample of some tie rods that had already been made in Europe, asking us to modify the shape and increase the quality of the compound to improve its elastic properties.
Having worked with the customer to estimate the annual consumption, we decided to make a two-position transfer mould with interchangeable inserts, allowing us increase the length of the rod. We also made a blanking tool to create 60 mm washers in which an M12 screw could be inserted to anchor the elastomeric material between the screen and the base.
We prepared the head supports, coating them with Chemosil 211 + Chemosil 425 primers to attach to an NR polymer. The choice of polymer was obvious: super-elastic natural rubber treated with sulphur to achieve a hardness of 50SH-A.
The results were excellent from the very first samples, and production continues under the same conditions today.