Patent ID: 8801999
Filing Date: 2014-08-12
Classification: B29C,F15B,Y10T

Abstract:
1. A stretching system for stretch-blow molding machines for stretch-blow molding containers from preforms, comprising at least one stretching unit which is hydraulically actuated for stretching a preform, with a hydraulic pressure tank which is at least partially filled with a hydraulic medium, and which is at least partially filled with a gaseous medium, the stretching unit comprising a stretching cylinder and a stretching piston, the stretching system designed to conduct the hydraulic medium out of the hydraulic pressure tank to the stretching cylinder of the stretching unit, whereby the stretching piston can be hydraulically moved in the stretching cylinder; further comprising a second tank for accommodating the hydraulic medium which is conducted out of the stretching cylinder when the stretching piston is moved in the stretching cylinder, wherein the second tank is provided in at least one line for returning the hydraulic medium and further comprising a pump, the pump being provided between the second tank and the hydraulic pressure tank.