The economic high ceramic Lunac 2+
alternative
coating for ceramic screws
Extrusion and plasticizing screws that are exposed to abrasive particles containing plastics such as glass fibres, should at least be hardened or nitrided. However, these surface treatments do not offer improved non stick effects, tarnishing and corrosion resistance or are still not enough resistant to wear. In some cases (partially) full ceramic screws are obtainable. Lunac 2+ now opens the |
possibility to practically transform a current steel screw into a ceramic screw, yet preserving the characteristic toughness of steel. Another important plating characteristic is the, for a hard coating almost unparalleled, good throwing power in the deep structures (usually 6 times better than that of hard chromium). Thick (crack free) coatings of more than 120 µm / 0.0047" thickness can be deposited. |
An extrusion screw can perform well over a long period due to the good corrosion and wear resistance of Lunac 2+ in a glass fibre filled PVC environment. The very good throwing power of this coating in deep structures is typical for Lunac >120 µm / 0.0047" in the deep structures vs. 160 µm (0.0063") near the flight tips. Although less explicit than with Lunac 1, Lunac 2+ offers a non- stick effect as well.
