OPTICAL DETERMINATION OF A CONTROL SIGNAL IN RESPONSE TO DETECTION OF MACROSCOPIC POLYURETHANE FOAM DEFECTS

Disclosed herein is a method of producing a polyurethane foam block (137') using a foam production machine (100) configured for producing polyurethane foam as a slabstock (137) using a continuous slabstock process defined by at least one process parameter, such as a raw material output factor o...

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Bibliographische Detailangaben
Hauptverfasser: KIWITT, Jörn, LANDERS, Rüdiger, TOMUSCHAT, Philipp
Format: Patent
Sprache:eng ; fre
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Zusammenfassung:Disclosed herein is a method of producing a polyurethane foam block (137') using a foam production machine (100) configured for producing polyurethane foam as a slabstock (137) using a continuous slabstock process defined by at least one process parameter, such as a raw material output factor or a conveyor speed. The foam production machine includes a mixing head (102) configured to mix precursor reagents for forming a reactive mixture (136), and a conveyor (106) configured to receive the reactive mixture. The method comprises: mixing (800) the precursor reagents in the mixing head to provide the reactive mixture; dispensing (802) the reactive mixture to initiate foaming of the reactive mixture; receiving (804) the reactive mixture by the conveyor; cutting (806) the polyurethane foam block from an end portion of the slabstock to produce a cut surface (724); acquiring (808) a digital image (742) of the cut surface using an imaging system (706); inputting (810) the digital image into a pattern recognition module (762), the pattern recognition module being configured to recognize at least one pattern being indicative of at least one macroscopic polyurethane foam defect, and being configured to output an identification (766) of a presence of the at least one macroscopic polyurethane foam defect in response to recognizing the respective pattern in the digital image; and inputting (812) the identification of the presence of the at least one macroscopic polyurethane foam defect into a control module (764), the control module being configured to process the inputted identification in order to output a control signal for changing the least one process parameter of the continuous slabstock process. La présente invention divulgue un procédé de production d'un bloc de mousse de polyuréthane (137') à l'aide d'une machine de production de mousse (100) conçue pour produire de la mousse de polyuréthane en tant que feuille de mousse (137) à l'aide d'un traitement de feuille de mousse continu défini par au moins un paramètre de processus, tel qu'un facteur de génération de matière première ou une vitesse de transporteur. La machine de production de mousse comprend une tête de mélange (102) conçue pour mélanger des réactifs précurseurs afin de former un mélange réactif (136), et un transporteur (106) conçu pour recevoir le mélange réactif. Le procédé comprend : le mélange (800) des réactifs précurseurs dans la tête de mélange pour procurer le mélange réactif ; la distributio