Mould for a wind turbine component

A method of making a mould for a wind turbine component, the component comprising a plurality of elements having different respective heat capacities, the mould having one or more first regions configured to support elements of the component having relatively high heat capacity, one or more second regions configured to support elements of the component having relatively low heat capacity, and one or more transition regions defined between the first and second regions, and the method comprising:

• a. providing a master plug defining an outer surface;
• b. arranging fibrous material on the outer surface of the master plug to form an inner mould layer of the mould;
• c. arranging a heating means and a heat distribution layer over the fibrous material, the heat distribution layer in a transition region of the mould being configured to enhance heat transfer within the heat distribution layer to a first region of the mould;
• d. integrating the inner mould layer, the heating means and the heat distribution layer to form the mould;
• and
• e. separating the mould from the master plug.

A mould system, comprising:

• a wind turbine component having a first element with a first heat capacity and a second element with a second heat capacity, the second heat capacity being lower than the first heat capacity;
• and
• a mould comprising:
• an inner mould layer defining a mould surface for supporting the plurality of elements;
• heating means disposed beneath the mould surface;
• and
• a heat distribution layer adjacent to the heating means;
• wherein the mould has a first region configured to support the first element of the component, a second region configured to support the second element of the component, and a transition region defined between the first and second regions;
• and
• wherein the heat distribution layer in the transition region of the mould is configured to enhance heat transfer within the heat distribution layer to the first region of the mould.