US 11,833,732 B2
Blow mould for forming plastic preforms into plastic containers with air discharge as well as base part for a blow mould
Bastian Tissmer, Regensburg (DE); and Peter Knapp, Schmatzhausen (DE)
Assigned to KRONES AG
Filed by KRONES AG, Neutraubling (DE)
Filed on Mar. 29, 2022, as Appl. No. 17/707,747.
Claims priority of application No. 10 2021 134 057.8 (DE), filed on Dec. 21, 2021.
Prior Publication US 2023/0191687 A1, Jun. 22, 2023
Int. Cl. B29C 49/62 (2006.01); B29C 49/48 (2006.01); B29L 31/00 (2006.01)
CPC B29C 49/62 (2013.01) [B29C 49/4802 (2013.01); B29C 2049/6271 (2022.05); B29L 2031/7158 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A blow mould for forming plastic preforms into plastic containers, having at least two blow mould side parts and a base part, which form a cavity, within which plastic preforms can be formed into the plastic containers by being acted upon by a flowable medium, wherein an inner wall of the blow mould side parts and of the base part which delimits the cavity has a contour which produces a predetermined shape of the plastic containers to be produced, wherein a plurality of openings being provided in at least one section of the base part, which openings allow a gaseous medium to be discharged during an expansion process of the plastic container, and
wherein
a ratio between a surface area of the base part and a surface area of the openings is 35-175, and the ratio depends on the size of the bottle and the shape of the openings.