Coatings Resist Abrasional Wear, Reduce Drag

Oerlikon Balzers provides a variety of surface treatments for plastic processing tools and equipment.

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Oerlikon Balzers provides a variety of surface treatments for plastic processing tools and equipment. The company’s physical vapor deposition (PVD) and diamond-like carbon coatings (DLC) are designed to protect against abrasional wear, and some can achieve hardnesses as high as 85 to 90 HRC, extending tool life and performance for such materials as beryllium copper, carbides and steels.

The company’s Balinit or Dylyn coatings are formulated to reduce frictional drag on moving and sliding components such as pins and sleeves, in some instances enabling lubrication-free molding. With coefficients as low as 0.04, the coatings also can improve part ejection/release from difficult geometries such as undercuts or low-degree draft angles, the company says. This reduced sticking on coated surfaces also improves production uptime by reducing the cleaning and polishing requirements to maintain molded or extruded part quality.

Coatings range in nominal thickness from 2 to 4 microns (0.00008" to 0.00015"), enabling them to be applied to finished tool dimensions without effecting critical tolerances.