Abstract: A method for removing a part from a mold and to a machine for molding said part, the part 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, includes at least two mold portions defining said shaping cavity therebetween. The mold is at a temperature between said glass-transition temperature and said melting temperature. The method comprises opening the mold by spacing apart said mold portions, locally spraying a cooling gas toward the part remaining in a portion of the mold using at least one nozzle, 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.
Type:
Application
Filed:
June 1, 2012
Publication date:
June 19, 2014
Applicants:
UNIVERSITE OSEPH FOURIER, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS, INSTITUT POLYTECHNIQUE DE GRENOBLE
Inventors:
Sebastien Gravier, Georges Kapelski, Jean-Jacques Blandin, Charles Josserond