Abstract: The invention relates to a moulding system (100) comprising a structure (102), a fixed mould (104) fixed to the structure (102), a first mobile mould (106) mounted with translational mobility on the structure (102) between an open position in which the first mobile mould (106) is away from the fixed mould (104) and a closed position in which the first mobile (106) is against the fixed mould (104), and a monitoring system (150) which comprises: a first reference surface (152) solidly fixed to the fixed mould (104) and parallel to the direction of translational movement (50) of the first mobile mould (106), a first sensor (154) solidly fixed to the first mobile mould (106) which comes to bear against the first reference surface (152) and is configured to measure a first distance perpendicular to the first reference surface (152), and a control unit (156) which is connected to the first sensor (154) and which is configured to detect a deviation in the first distance measured by the first sensor (154) with res