Following shortages of chocolate moulds in the Second World War, John Mackintosh and Sons encouraged the Directors of Frank Ford and Sons, a Halifax-based engineering concern, to set up facilities for the manufacture of moulding equipment to be used in production by Mackintosh. The resultant company - Yorkshire Moulds Limited - was incorporated on the 25 June 1947, with Mackintosh contributing 1/3 of the original equity. Yorkshire Moulds provide equipment for Mackintosh and other manufacturers, notably Cadburys. By the mid 1970s, Yorkshire Moulds was the sole manufacturer of chocolate moulds in the UK.

Yorkshire Moulds initially made moulds from metal, but moved to plastic injection moulding in 1965. Following financial difficulties in the Frank Ford engineering company brought about by the collapse of Rolls Royce Limited in 1971, Yorkshire Moulds became a wholly-owned subsidiary of John Mackintosh and Sons on the 2nd January 1972.

Yorkshire Moulds became a wholly-owned subsidiary of the Concentric Group of companies in 1995, and diversified into more general thermoplastic applications. The company was acquired via a management buy-out in 2002, and dissolved in 2007.