Patent ID: 7585453
Filing Date: 2009-09-08
Classification: B29C,B29L

Abstract:
1. A device for thermoforming an object presenting an undercut portion and a base portion, the device comprising: a thermoforming mold having a base portion and at least two undercut-forming portions in the vicinity of an open end; a countermold having an end that is suitable for co-operating with said end of the mold so as to clamp a piece of thermoplastic material thereagainst and so as to co-operate with said portions of the mold to define a thermoforming cavity; and a thermoforming piston that is mounted to move between a thermoforming active position in which said piston penetrates into said cavity and an inactive position in which said piston is situated outside said cavity, the two undercut-forming portions of the mold being suitable for being moved apart so as to enable the object to be unmolded; the device further comprising holding means suitable for holding the object relative to the countermold, and, in order to unmold the thermoformed object, said portions of the mold and the holding means being suitable for being controlled in a sequence in which the undercut-forming portions of the mold are moved apart, said holding means are active and hold the object relative to the countermold, and at least the base portion of the mold is spaced apart from the countermold while the holding means are active.