Status: Need is Open

Non-stick coating technology for large multi-use, resin transfer mould tooling

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An alternative non-stick coating is required for resin mould tooling to extend the number of uses prior to requiring the coating to be removed and re-coated. 



The moulding of large epoxy resin based composite components, currently use fluoropolymer release coated metal multi-part tools (Aluminium and Carbon Steel). The tools are in the range of 0.8m to 2.5m diameter cylindrical tools and typically need to be re-coated after a number of uses. The wear is as a result of abrasion between the cured component and the tool’s surface coating, following the extraction of the moulded component. The costs associated with this re-coating are a significant element of the overall production costs and therefore an alternative solution that would increase the number of cycles before re-coating is required.


Prior to moulding of the super-conducting coil the multi-part tools must be assembled to form the tool cavity. The moulding takes place under a vacuum and therefore outgassing of the coating solution must be minimal. During the curing cycle the tool is exposed to a temperature of 100° C for a period of several hours. Once cured, the tool is disassembled and the moulded component is removed from the tool. During this process the moulded part grips the tool and therefore during removal the part slides across the surface of the tool. After multiple cycles the coating is abraded to a level where it is required to be replaced to ensure the component does not stick to the tooling.



Figure 1 Sectional view of a typical multi-part mould tool construction



Figure 2 Typical tooling construction


Key success Criteria

The coating shall be capable of:

  • Being easily applied to carbon steel or Aluminium Alloy tooling in the size range 0.8m to 2.5m diameter by 1m high
  • Coating application does not affect deform tool (Tool tolerances +/-0.05mm)
  • Being robust enough to resist damage during the handling of the tooling and abrasion during the removal of the moulded component following the resin curing cycle
  • Known electrical breakdown resistance
  • Capable of resisting temperatures of ~100°C  throughout the resin curing process
  • Minimal out-gassing during the production cycle
  • Coating must not transfer to moulded component
  • Being repaired or removed and re-applied should the coating be damaged
  • Lowest cost / moulding cycle, e.g. Coating cost divided by number of cycles
  • Being applied in a known and repeatable thickness
  • RoHS compliant
  • Globally available



Possible Approaches

The current solution is a multi-use coating that is applied via spraying and therefore alternative materials that could be applied in a similar or different approach would be considered. Single use solutions that can be re-applied easily prior to each use could also be considered.


Approaches not of Interest

All options that align to the key success criteria shall be considered.


Due Date
Mar 14
Items to be submitted

Solutions to this problem should describe in detail the following aspects:

  • Material description and application process
  • Lead time to complete coating application
  • Current availability of proposed solution
  • Timeline to supply a development sample
  • Price estimation based on all elements of the solution with m2 as the defined unit of measure

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Client Point of Contact

Super User
Gallery Moderator(s)
Stephen Clulow
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