US 10,118,330 B2
Molding unit comprising mold bottom actuation means supported by a fixed holder
Damien Cirette, Octeville-sur-Mer (FR); and Yves Roche, Octeville-sur-Mer (FR)
Assigned to SIDEL PARTICIPATIONS, Octeville-sur-Mer (FR)
Appl. No. 15/304,606
Filed by SIDEL PARTICIPATIONS, Octeville-sur-Mer (FR)
PCT Filed Apr. 2, 2015, PCT No. PCT/EP2015/057374
§ 371(c)(1), (2) Date Oct. 17, 2016,
PCT Pub. No. WO2015/158559, PCT Pub. Date Oct. 22, 2015.
Claims priority of application No. 14 53396 (FR), filed on Apr. 16, 2014.
Prior Publication US 2017/0036389 A1, Feb. 9, 2017
Int. Cl. B29C 49/48 (2006.01); B29C 49/12 (2006.01); B29C 49/36 (2006.01); B29C 49/70 (2006.01); B29C 49/30 (2006.01); B29K 67/00 (2006.01); B29C 49/06 (2006.01); B29K 101/12 (2006.01); B29K 105/00 (2006.01); B29L 31/00 (2006.01)
CPC B29C 49/48 (2013.01) [B29C 49/12 (2013.01); B29C 49/30 (2013.01); B29C 49/36 (2013.01); B29C 49/4823 (2013.01); B29C 49/70 (2013.01); B29C 49/06 (2013.01); B29C 2049/4858 (2013.01); B29C 2049/4892 (2013.01); B29K 2067/003 (2013.01); B29K 2101/12 (2013.01); B29K 2105/253 (2013.01); B29L 2031/7158 (2013.01)] 15 Claims
OG exemplary drawing
 
1. Molding unit (10) for the forming of a container made of thermoplastic material by blow molding, particularly by stretch blow molding, of a preform, the molding unit (10) having:
two half-molds (14) that are transversely mobile in relation to a fixed holder (26) between a molding joined position and a separated position for extraction of the finished container;
a mold bottom (16) that is vertically mobile between a lower position for extraction of the finished container and an upper position for molding of a base of the container, the mold bottom (16) being able to be moved between the two half-molds (14) in the molding joined position over a directed path, termed boxing, that extends from an initial intermediate boxing position to its upper molding position;
a carriage (24) that carries the mold bottom (16) and that is mounted to move in the fixed holder (26);
first actuation means to move the carriage (24) relative to its fixed holder (26) between a lower position of the mold bottom (16) and its initial intermediate boxing position;
second actuation means having at least one cylinder (32) housing a piston (98) sliding vertically that is able to push the mold bottom (16) over its boxing path by pressurizing a lower work chamber (100) of the cylinder (32);
wherein the mold bottom (16) is supported in a fixed manner by the carriage (24), the cylinder (32) being fixed relative to the fixed holder (26).