Founding cast iron, sand moulding: removal of pattern and preparing the mould

Description Founding cast iron, sand moulding: removal of pattern and preparing the mould

Date 9/11/2017

Collection Historic Environment Scotland

Catalogue Number MV 000763

Category Digital Files (Non-image)

Scope and Content Process: Casting Iron, preparing the mould box (top half) for part of a bowl casting to be replaced on Ross Fountain, Waverley Gardens, Edinburgh. The mould for the casting is in two halves with the decorative surface facing down. The pattern of the object to be duplicated is packed and compressed into the sand to produce a negative. Here we see the foundry worker after having removed the upper half of the mould box to reveal the mould left by the pattern. The sand is quite firm (it has been left to dry for about an hour) and can have the holes drilled into it to allow gas to escape during pouring the molten iron into the mould. The gas holes are filed and cleaned. Compressed air removes excess sand. The mould is then sprayed with a mix of plumbago and oil known as 'blacking'. This is ignited, the burning off to stop uneven surfaces developing where the casting will sit against the mould. The part being recast is one of the basins from the Ross Fountain. JT and E Castings of Wigan carried out the foundry work. Sound: sound Colour: colour Running Time: 3.02 mins

External Reference vimeo251658100

Permalink http://canmore.org.uk/collection/1595345

File Format (MP2) MPEG-2