Patent ID: 9050751
Filing Date: 2015-06-09
Classification: B29C

Abstract:
1. Device with blow stations disposed on a blow wheel for blow moulding containers from a thermoplastic material, the device comprising: a unit for pneumatic control of a blow pressure, the pneumatic control unit having a control piston which is guided in a cylinder and is mounted so as to be movable in the direction of a longitudinal axis of the piston; a main flow path extending through the cylinder, the control piston being operable to close the main flow path; and a control surface provided with the control piston, the control surface facing a control chamber of the cylinder, the control surface being designed to transmit a control force to the control piston, wherein the control piston is constructed at least in some regions from a metal or a ceramic, and wherein the main flow path is located in a circumferential wall of the cylinder, and wherein the main flow path is covered or sealed by an external circumference of the pneumatic control unit, and not covered or sealed by a base structure of the control piston.