Mould, machine and method for manufacturing three-dimensional items and manufacturing plant associated with same

A mould for manufacturing three-dimensional items, comprising:

• a body which defines an internal surface, comprising:
• a fixed portion whereon the mould is supported;
• and
• an interchangeable portion which is configured to be removably mounted on the fixed portion;
• a lid configured to close said body;
• and
• incorporated closing and opening means configured to keep the body and the lid joined during the movement of said mould;
• wherein the incorporated closing and opening means are configured to move together with the mould along a production line, ensuring a secure and airtight closure of said mould, able to resist the working pressures produced therein, keeping the lid closed against the body,
• wherein the interchangeable portion is arranged within the fixed portion, defining the internal surface of the body;
• and
• wherein the mould comprises:
• an elastically deformable template arranged between the body and the lid, which fits on the internal surface and which is configured to receive one or more laminar parts of an item to be manufactured;
• and/or
• a countermould or last which occupies a defined volume between the body and the lid.