GEO Injector Blasting Process 

Precise & Clean Innovative solutions for removing burrs and for superfinishing of surfaces

Complex and demanding component geometries as well as new materials or material combinations represent a special challenge in parts production with regard to burr-free and rounded edges.In order to generate the precise and clean surfaces required for subsequent processes, combined processes such as the GEO injector blast process for superfinishing and ultrasonic cleaning are the first choice. In addition to the above criteria, the focus is on the requirements for a simple application and low operating costs.

Thanks to their compact design, their flexibility and, due to the reusability of the blasting abrasive, low consumption costs, mobile blast machines are an optimal solution for surface processing in the production of single parts and small batches.

For a perfect parts finish, aqueous cleaning procedures offer both for pre- and post-treatment as well as for preservation an outstanding solution.

The Process

By means of one or more compressed air-driven injector nozzle(s), a blasting agent is sucked from a reservoir, pre-accelerated by means of compressed air and feed into a jet nozzle system, consisting of one or more laval nozzles. In addition, a further increase in speed to up to 2 times the speed of sound can take place between the individual nozzles by means of compressed air.
The sucked abrasive is directed to the workpiece to be machined. At the same time the rebounding abrasive is sucked off at high speed. Here, the extracted air quantity is higher than the air supplied by compressed air, resulting in a virtually particle-free working space.



  • Partial or surface machining with defined processing depth and edge sharpness.
  • Deburring of e.g. casting-, stamping-, milling and turning parts of metal, plastic or composite materials
  • Removal of burrs & massive burr roots using spherical or abrasive blasting media
  • Activation as preparation for bonding or painting of plastic or metal surfaces
  • Roughening in preparation for coloring and joining processes, galvanizing, etc.
  • Drilling e.g. in glass, ceramics, stone, GRP and CFRP with rounded edges or high edge definition in any geometry
  • Removal e.g. of particles, dusts, soot, traces of powder, etc.
  • Tempering by smoothing, structuring or hardening of the surfaces
  • Matting of glass, plastic or metal surfaces
  • Decoating of surface-disturbing substances such as paints and varnishes, oxides, corrosion, dirt, etc., exposing contact surfaces with solar glass, partially or evenly

at a glance  

  • Reproducible process precision of up to 1/10.000 mm
  • Easy accessibility of undercuts and intersecting holes
  • Suitable for small components, large assemblies and endless profiles
  • Blasting agent is separated and can be reused
  • Closed blasting medium circuit with integrated treatment
  • Low emissions due to jet hoods or blast chambers sealed airtight to the environment