Hot Moulds

Energy efficient light weight carbon fibre heated moulds

The carbon fibre reinforcement of the mould IS the electrical resistance that heats the mould surface only. We do not need to heat the entire thickness of the mould. We only heat the top few millimeters that are needed to heat the part. The low mass translates in fast heating, fast cooling and very low energy consumption.


Watch a 12K carbon fibre tow light up just before it evaporates at 2400°C. This happened with only 300 W of power.

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The standards mould concept is a carbon fibre sandwich construction. This results in very light weight and stiff moulds that are very easy to handle in your workshop. Even large moulds can be handled, moved and stored easily.


The Coefficient of Thermal Expansion of the mould is close to zero resulting in very dimensionally stable moulds.

Applications:

  • RTM / RTM-light
  • Vacuum infusion
  • Wet compression
  • Hand lay-up
  • Filament winding
  • Prepregs
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By controlling the electrical current in the carbon reinforcement of the mould, the mould surface temperature can be varied fast and with high accuracy. Carbon has a low electrical resistance and allows for very efficient energy transfer.

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Temperature and pricing:

 

The price of a mould depends on the complexity of the geometry and the desired operation temperature.

 

For operating temperatures up to 80°C, the price of the mould is comparable to a non-heated composite mould. Instead of buying a mould and an oven to post-cure your parts, you may just as well not invest in an oven.

 

The higher the temperature, the more interesting our technology becomes. In the temperature range up to 130°C, our moulds are surprisingly affordable compared to other alternatives in the market.


For temperatures higher than 180°C, please feel free to ask about the possibilities.

The numbers:

  • Heating rate up to 1K/s is possible
  • Maintaining 100°C with 100 W/m²
  • Depending on requirements mould energy output varies between 500 and 1.500 W/m²
  • Heating fields with different temperatures are possible

Basic characteristics:

  • Low mass – easy handling and fast heating and cooling
  • Low energy consumption
  • Very economical compared to other alternatives
  • Heating only the mould surface
  • Safe system because of low voltage
  • Active cooling integration is possible
  • Fully programmable temperature (curing cycle) control

Available options:

  • RTM-light counter mould
  • Re-usable vacuum bags for vacuum infusion, preforming consolidation and prepreg
  • Metallic surface coating
  • Cure monitoring and resin arrival sensors
  • Automated report generation of temperature curing cycle profile, resin polymerization and Tg development.
  • Vacuum pressure sensors and transmitters