Post Processes

MICROBLASTING

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The process of Microblasting entails using dry agents for blasting shots with defined grain sizes, hardnesses and geometries to influence the microtopography of surfaces of any kind and condition in order to improve them.


The benefits of microblasting the surfaces:


  • 100 % pure base material with no loose particles;
    • No preferred direction, unlike in brush finishing;

  • Reproducible machining process;
  • Time and cost savings;
  • Optimum adherend surface for subsequent coatings;
  • Repair of mould cavities to produce VDI-compliant surfaces.

Objectivs of Microblasting Technology

Surface cleaning
Surface densification
Increase in percentage contact areas
Micro deburring
Adherend surface preparation
Surface texturing
Reproducible surfaces
Technology transfer to the customer

EXAMPLES


Microblasting technology Thickness of white zone Roughness improvement of Ra1,59 μm on Ra 0.56 μm. No more polish necessarily Time, 15mins


Copper and graphite electrodes are uniformed after milling,i.e. loose parts are removed, surface pores opened and burrs removed (even in the case of miniature electrodes) so that the service life is extended, targeted blasting is carried out and surface roughness on the tool is reduced.


Defined VDI-compliant surface geometries and roughness valuesfor plastic injection moulds are generated. The erosion of mouldcavities can sometimes be dispensed with.Surface structures can be appliedstraight after milling or grinding.



Very wide range of applications, particularly with subsequent PVD (Physical Vapor Deposition),CVD (Chemical Vapor Deposition) or galvanic coating. Tangential rounding of the cut edges inthe micro range (μm) optimises the service life of the tool edge.Application likewise in 2 steps: cleaning and edge rounding in the first stage, densification of the tool surface in the second microblasting step.


Eroded surface


Milling surface