US 12,454,092 B2
Method and apparatus for forming plastic preforms for plastic containers with curve evaluation
Andreas Steiner, Wenzenbach (DE); Thomas Gerstenberg, Regensburg (DE); Philipp Olenberg, Regensburg (DE); Simon Fischer, Regensburg (DE); and Sebastian Kirchmayer, Geiselhoering (DE)
Assigned to KRONES AG, Neutraubling (DE)
Filed by KRONES AG, Neutraubling (DE)
Filed on Sep. 20, 2022, as Appl. No. 17/949,192.
Claims priority of application No. 10 2021 128 204.7 (DE), filed on Oct. 28, 2021.
Prior Publication US 2023/0138489 A1, May 4, 2023
Int. Cl. B29C 49/10 (2006.01); B29C 49/32 (2006.01); B29C 49/78 (2006.01); B29L 31/00 (2006.01)
CPC B29C 49/32 (2013.01) [B29C 49/122 (2022.05); B29C 2049/7831 (2022.05); B29C 2049/7832 (2022.05); B29C 2049/78805 (2022.05); B29L 2031/712 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method for forming plastic preforms into plastic containers comprising:
introducing a plastic preform into a blow mould;
expanding the plastic preform into a plastic container by applying a flowable medium, wherein the plastic preform is applied by at least two different pressure levels; and
introducing a stretching bar into the plastic preform to expand the plastic preform in its longitudinal direction, wherein a pressure curve and/or a movement curve of the stretching bar and/or a force curve of the stretching bar is determined by at least one measuring device during the expansion process,
wherein at least one of the curves is evaluated by a processor device and at least one point or region of this curve, which is characteristic of a course of the curve, is determined,
wherein a plurality of plastic preforms are formed into the plastic containers by a plurality of forming stations and each forming station is controlled individually taking the at least one point and region into account, and
wherein data are linked to each point and/or region, which allow conclusions to be drawn about the relevant forming station.