Effects of Vickersil® coating
Black spots arrive later
Vickersil® has a very great passivity towards molten polymers. Therefore the adherence of polymers and elastomers on toolings is highly reduced, there are less residuals generating black spots.
The down-time of the machines for cleaning purposes is reduced and productivity increases.
Example: Appearance of black spots over time
Improved abrasion resistance
When filled polymers are processed, the lifespan of equipment is reduced.
Due to its surface hardness and its passivity towards molten polymers, Vickersil® coating offers a very high resistance to abrasion.
Example: torpedo for injection molding
Die droll is reduced
Vickersil® coating reduces adherence of polymers on mechanical parts. Flow speed of the polymer is more homogenous, polymer has less shear stress due to velocity gradiants, so die droll is reduced.
Example: cable extrusion
The polymer velocity Vp in contact with the die is lower than the polymer velocity in contact with the conductor Vc.
Vc > Vp , polymer is under shear stress, die drool is created on the die and surface finish on the cable is not good.
With Vickersil® coating
The polymer velocity Vp in contact with the die and the guide is nearly identical to the conductor velocity Vc.
Vc ≅ Vp , there is no shear stress in the polymer, die droll effect is reduces and the surface finish on the cable is better.
Parisons are undeformed
When using Vickersil® coating on tooling, polymer flow speed at the inner and outer surfaces of the parison are similar, therefore deformation is limited.
Example: tube extrusion
Better surface finish of the molded parts
The surface quality of a mould has a direct influence on the properties of injected pieces. In a mould coated with Vickersil®, the pieces have an excellent surface finish, as well as much better general properties.
Example: O-ring injected seal
Surface quality of a steel mold before and after coating
Uncoated steel Steel coated with Vickersil®
Surface quality of an O-ring injected seal
Surface finish of a seal injected Surface quality of a seal injected
into an uncoated mould into a mould coated with Vickersil®