Control system of a container forming unit comprising a master control unit and slave controllers

System (34) for controlling a unit (9) for forming containers (2) from blanks (3) made of thermoplastic material equipped with a series of forming stations (10), each equipped with a mold (11) with the imprint of a container (2), with this system (34) being characterized in that it comprises a master control unit (36) and a series of slave controllers (37) tied to the master control unit (36) and each associated with at least one forming station (10), each controller (37) being programmed for:

• Directing the forming station or each associated forming station (10) according to a forming instruction (CF) that is loaded into the controller (37);
• Taking into account a measurement of pressure in the mold (11),
• Based on this measurement, plotting a blow-molding curve describing the change in the fluid pressure in the mold (11),
• Analyzing the blow-molding curve and extracting from it the coordinates of at least one singular point (S),
• Communicating the singular point (S) to the control unit (36),
• and in that the master control unit (36) is programmed for:
• Directing the controllers (37),
• Taking into account the singular point or each singular point (S) communicated by each controller (37),
• Calculating a characteristic point (CS) that is a function of the singular point(s) (S),
• Comparing the characteristic point (CS) with a theoretical point memorized in the control unit (36),
• If a variation is declared between the characteristic point and the theoretical point, issuing a corrected forming instruction (CF),
• Loading the corrected forming instruction (CF) into the controller or each controller (37).