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RESTRAINED CASE MOULDS
Restrained case moulding is the traditional technique used to make art foundry reproduction moulds, and is probably still the best method of creating a high quality pattern impression and long lasting mould.
With this technique, the mouldmaker will normally have to manipulate the master pattern into a convenient position to set it up for moulding, so this is not an ideal method for moulding fixed position patterns, or types of pattern that are difficult to handle and liable to fall apart if moved.
Unlike the hand/brush applied blanket mould, which has a mould case constructed after the rubber layer is applied, the restrained case mould requires the mouldmaker to first construct a mould case over the master pattern, then pour the moulding compound into the case (and over the underlying pattern). Like the drop mould which is surrounded by shuttering, a restrained case mould can contain very fluid moulding compounds, as well as ‘hot melt’ moulding media, such as PVC plastic and GELATINE.
Restrained case moulding also has the advantage of enabling the mouldmaker to pour each division one session at a time, leaving each section of the mould to cure, without having to attend further for fear of slumping etc. For a more detailed description of the restrained case moulding technique, please refer to the illustrated sequence.
MOULDMAKING HINTS >
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