Patent ID: 7677876
Filing Date: 2010-03-16
Classification: B29C,Y10S

Abstract:
1. Die for rotational pressing, said die comprising a breather device for connection of an interior of the die with an exterior of the die, said breather device including a passageway between the interior and the exterior of the die for two way communication of air, said passageway being equipped with a valve, said valve being moved between an opened position and a closed position by an actuator piloted by a handling controller, said valve being moved from the closed position to the opened position and thereby opening the passage to flow of air after a first step of the pressing process, the valve including a shutter, the shutter being moved between the open and closed positions by the actuator through a control rod, the shutter sealingly traversing a wall of the die against air flow at a chamber of a valve body, the control rod having an axial passage communicating with the outside of the control rod through radial passages near the shutter for communication with the interior of the die upon opening movement of the shutter towards the interior of the die, a source of air under pressure connected in a controlled manner to said chamber of the valve body to injects upon commands air under pressure into the die when the shutter and valve are in the opened position, and a sensor element traversing axially the shutter to project into the die.