The HPML process involves several steps. First, a pattern is created using a combination of materials, including the HPML pattern. The pattern is then placed in a mould box, and sand is packed around it to create a mould cavity. The mould box is then placed in a high-pressure moulding machine, which applies pressure to the sand to compact it and ensure that it fills all of the spaces around the pattern.

After the sand has been compacted, the mould box is removed from the moulding machine, and the pattern is removed from the sand mould. The mould is then ready to be used for casting metal parts.

HPML patterns offer several advantages over other types of patterns used in the foundry industry. They can be used to produce large and complex parts with high dimensional accuracy and repeatability. Additionally, the HPML process is highly automated and can produce moulds quickly and efficiently. With their ability to withstand high pressure and produce complex shapes with high accuracy, they are a popular choice for many casting applications.