Method for removing a part made of a material having a glass-transition tempertaure from a mold, and molding machine
Résumé
The invention relates to a method for removing a part from a mold and to a machine for molding said part, which is in particular made of a material having a glass-transition temperature and a melting temperature that is higher than the glass-transition temperature, and which is shaped in the cavity of a mold including at least two mold portions (3, 4) defining said shaping cavity (5) therebetween, wherein the mold is at a temperature between said glass-transition temperature and said melting temperature, and wherein the method comprises: opening the mold by spacing apart said mold portions (3, 4); locally spraying a cooling gas toward the part remaining in a portion of the mold using at least one nozzle (9); and, after a predetermined time period following the start of spraying the gas, ejecting the part from said portion of the mold, the time period being such that the part reaches a temperature that is lower than the glass-transition temperature thereof.