Guyson’s new system for powder removal from from medical implants

Guyson's new system for powder removal from from medical implants
Guyson’s Powder Flush system for removal of residual Additive Manufacturing powders from trabecular implant structures (Courtesy Guyson International Ltd)

Industrial finishing equipment manufacturer Guyson
International Ltd, headquartered in Skipton, North Yorkshire, UK, has launched
a new ‘Powder Flush’ system designed specifically to flush residual powder from
medical implant trabecular structures, once additively manufactured.

Additively manufactured orthopaedic implants are typically
made by Electron Beam or Laser Powder Bed Fusion (EB- or L-PBF) processes from
titanium powders. After manufacture, the bulk of the residual powder is removed
from the build block with brushes and vacuums, sometimes followed with an
air-wash or blast process to remove any semi-adhered powder particles, but
because of the nature of the porous trabecular structures, small powder
residues often remain trapped inside the component and must be removed. 

The Guyson Powder Flush is based on the company’s Orbit 600
rotary basket spray wash unit, built in full stainless steel 304 construction,
fitted with a 100 l insulated tank and hot spray flushing facilitated through a
high flow rate and pressure pump fitted with viton seals. The machine offers
directed jets for powerful component flushing followed by compressed

A PLC/HMI control panel to the left of the machine provides
data monitoring and timed pre-heat function ensuring accurate and repeatable
process operation. LED interior lighting and a double glazed viewing window, in
the lid, facilitates visual checks on parts in process.

In operation, the implants are individually or batch loaded
on non-contaminating fixtures presenting the work piece to the directed
flushing jets in close proximity to the trabecular surface, thus ensuring
thorough powder removal. Timed electronic door interlocks prevent the door
opening during operation and until hot steam has dissipated at the end of the

The machine is also equipped with process alarm signals with
audible and visual cues via an Andon beacon to show the end of part processing,
as well as fluid-level sensing and advanced filtration, fitted to the rear of
the unit. 

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