INJECTION DEVICE COMPRISING AT LEAST ONE FLEXIBLE DIAPHRAGM

摘要

An injection device having at least one flexible diaphragm The injection device for forming a preform into a container and filling the container, and further including a main housing having an inlet, an outlet and an injection chamber, a closing body movable relative to the outlet between a closed position and an opened position, a closing diaphragm attached at least to the closing body, the injection chamber being delimited at least by an inner surface of the closing diaphragm, the closing diaphragm having an outer surface defining an outside area, a bearing surface against which a supported portion of the outer surface of the closing diaphragm is applied. The closing diaphragm further includes a free portion forming with the supported portion the whole outer surface of the closing diaphragm. The bearing surface is arranged such that the surface of the free portion decreases when the closing body moves from the closed position to the opened position.

主权项

1. An injection device for a forming and filling station for forming a preform into a container and filling the container using a pressurized liquid, the injection device comprising:
a main housing comprising an inlet configured to be placed in fluidic communication with a pressurized liquid source, an outlet configured to be placed in fluidic communication with the preform and an injection chamber arranged to receive and contain the pressurized liquid and place the inlet in fluid communication with the outlet, a closing body, movable relative to the outlet between a closed position and an opened position, a closing diaphragm attached at least to the closing body, the injection chamber being delimited at least by an inner surface of the closing diaphragm, the closing diaphragm having an outer surface extending outside the injection chamber and defining an outside area isolated from the injection chamber in a fluid tight manner, a bearing surface against which a supported portion of the outer surface of the closing diaphragm is applied, the bearing surface being defined by at least one of a part of the main housing and a part of the closing body, the closing diaphragm further comprising a free portion forming with the supported portion the whole outer surface of the closing diaphragm, wherein the bearing surface is arranged such that the surface of the free portion decreases when the closing body moves from the closed position to the opened position.