Apparatus for moulding plastic preforms
AssigneeKrones AG
InventorsEduard Handschuh, Juergen Soellner
Life of this patent
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Abstract
An apparatus for molding plastic preforms into plastic containers, includes a clean room, at least one blow station having a blow mold for shaping the plastic preforms by at least one process pressure, and a venting device for venting or reducing the process pressure into the atmosphere. The venting device has at least one venting valve through which pressure can be vented into the atmosphere via a sound absorber, and a pressure drop safety device for closing the venting valve before the atmospheric pressure level on the venting device is reached.
Claims11
An apparatus for moulding plastic preforms into finish-blown plastic containers, comprising a clean room having at least one blow station comprising a blow mould for shaping the plastic preforms using at least one process pressure, and comprising a venting device for venting or reducing the process pressure to a recovery pressure into the atmosphere, wherein the venting device comprises at least one venting valve through which the process pressure or the recovery pressure can be vented into the atmosphere via a sound absorber,
- wherein a pressure drop safety device for closing the venting valve before the atmospheric pressure level is reached is provided on the venting device, wherein the venting valve is closed at the latest when a predefined positive pressure is reached in the finish-blown plastic container.
An apparatus for moulding plastic preforms into finish-blown plastic containers, comprising a clean room having at least one blow station comprising a blow mould for shaping the plastic preforms using at least one process pressure, and comprising a venting device for venting or reducing the process pressure to a recovery pressure into the atmosphere, wherein the venting device comprises at least one venting valve through which the process pressure or the recovery pressure can be vented into the atmosphere via a sound absorber,
- wherein the venting device is at least temporarily in fluid connection with a finish-blown plastic container arranged in a blow station of the moulding apparatus by a pressurized line,
- wherein a pressure drop safety device for closing the venting valve before the atmospheric pressure level is reached is provided on the venting device,
- and wherein the venting valve can be set in a closed state by the pressure drop safety device when a predefined positive pressure is reached in the finish-blown plastic container.
Dependencies are inferred from the claim text.