Blow moulding machine with separate pressure pad control

A method for moulding plastic preforms, wherein the plastic preforms are introduced into a blow mould and are expanded by applying a flowable medium thereto, which is introduced into an internal space of the plastic preforms, wherein said blow mould includes at least two lateral parts which form a cavity during the expansion of the plastic preforms, within which the plastic containers are expanded, wherein said lateral parts are respectively provided on lateral part carriers that are moved relative to each other for opening and closing the blow mould, and wherein at least one arrangement of a lateral part carrier and the lateral part provided thereon has an expansion element adapted to have a gaseous medium applied thereto, which expansion element ensures, when the gaseous medium is applied thereto, that one lateral part is moved towards the other lateral part, wherein during the expansion of the plastic preforms, at least two different pressure levels are applied to the latter, and wherein this application of pressure to the plastic preform is started at a predetermined point in time (Tb),

• wherein during said expansion process, a first pressure (Pe1) is applied to said expansion element during a first time section (dT1) of said expansion process and a second pressure (Pe2) that is greater than said first pressure (Pe1) is applied during a second time section (dT2) that follows in time after the first time section (dT1), wherein the first pressure deviates at least at times, from an instantaneous pressure that is applied onto the plastic preform.