Resin injection regulator, resin injection circuit and associated methods

A resin injection circuit comprising a mould for producing a composite part, at least one resin injection cylinder able to feed with resin said mould, and at least one resin injection regulator connected to said circuit,

• wherein said resin injection cylinder can be disconnected from the said resin injection circuit, and
• wherein said resin injection regulator comprises at least one vessel which is connected to said circuit and inside of which a movable single solid wall can be moved in a sealed manner, said movable single solid wall having a first face defining in said vessel a first internal cavity, forming a container for accumulation of resin, which is designed to be connected to at least one part of said resin injection circuit, said movable single solid wall having a second face opposite to said first face and defining in said vessel a second internal cavity which is designed to be connected to a source of pressurised fluid of said resin injection circuit, said movable single solid wall being designed to be urged directly by the pressurised fluid being injected in the second internal cavity and coming from the source of pressurized fluid so that movable single solid wall exert a pressure on the resin contained in the first internal cavity by isolating said resin from said fluid, said pressure being configured to maintain a resin pressure in said circuit whilst the resin injection cylinder is disconnected.