Patent ID: 9688013
Date: 2017-06-27
CPC Classifications: B29C,B29K

Claim:
1. A method of manufacturing a container from a plastic blank in a stretch blowing assembly equipped: with a mold provided with a wall defining a cavity with an impression of the container, extending along a principal axis of the mold and a mold bottom that is axially movable with respect to the wall between an extended position and a retracted position, with a stretch unit comprising a carriage provided with a protruding arm onto which a stretch rod is attached, the stretch rod is axially movable with respect to the wall and a control device for controlling the movement of the stretch rod, said method comprising: a phase of inserting the blank into the mold; a phase of stretch blowing, during which a fluid under pressure is injected into the blank and the stretch rod is moved towards the mold bottom until locally pressing the blank against the mold bottom, the lower position of the stretch rod being adjusted so that a gap is left between a free end of the stretch rod and an upper surface of the mold bottom; a boxing phase wherein: stopping the stretch rod to prevent rebound of the stretch rod at an end of the boxing phase, when the mold bottom reaches the retracted position.