Patent ID: 7824166
Filing Date: 2010-11-02
Classification: B29C,B29K,B29L

Abstract:
1. Blow-molding installation for manufacturing thermoplastic hollow bodies by blow-molding or stretch-blow-molding containers in a molding cavity of a mold, this blow-molding installation comprising: a nozzle actuator comprising at least one moving nozzle piston; a nozzle able to establish a sealed fluidic connection with the neck of a container placed in the molding cavity; and pneumatic means for operating the actuator between a raised position in which the nozzle is raised above the mold and a blow-molding position in which the nozzle makes a sealed fluidic connection with the neck of a container placed in the molding cavity; wherein the nozzle actuator is a double-acting actuator with two stages in series equipped with two pistons, these being an upper piston and a lower piston respectively; wherein the nozzle is fixed removably on the free end of the lower piston; and wherein the pneumatic control means are designed to make said pistons slide according to two operating modes, namely: a first operating mode used when the nozzle is of the type that makes sealed contact with the mouth of the neck of the container, and a second operating mode used when the nozzle is of the bell type with sealed contact against the surface of the mold in which the container is placed.