Apparatus and a method for moulding plastic preforms

Abstract

The invention relates to an apparatus (1) for moulding plastic preforms (10) into plastic containers (10a), comprising a clean room (20), at least one blow station (8) comprising a blow mould (4) for shaping the plastic preforms (10) by means of at least one process pressure (89, 91, 92), and comprising a venting device (65) for venting the process pressure (89, 91, 92) or a process pressure reduced to a recovery pressure into the atmosphere, wherein the venting device (65) comprises at least one venting valve (67), by means of which the process pressure (89, 91, 92) or the recovery pressure can be vented into the atmosphere via a sound absorber (69), said apparatus (1) being characterised by a pressure drop safety device (68) for closing the venting valve (67) before the atmospheric pressure level (97) on the venting device (65) is reached.

Dependencies are inferred from the claim text.