Apparatus and method of shaping plastics material pre-forms into plastics material containers with stretch bar movement sealed off by rolling diaphragm

US9573315B2 · kind B2 · utility

Assignee

• KRONES AG · DE

Inventors

• Michael Neubauer · Neutraubling, DE
• Yasin Kerim · Königsbrunn, DE
• Eduard Handschuh · Regensburg, DE

Key dates

• Filing date: Jun 27, 2012
• Grant date: Feb 21, 2017
• Expiry date: Nov 22, 2033

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29C2949/0715
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

An apparatus for shaping plastics material pre-forms into containers includes a blow molding station on a movable conveying device. The station has a blow mold forming a cavity in which the pre-forms are expandable by a gaseous medium. A stressing device acts upon the pre-forms with the gaseous medium to expand them. A clean room surrounds the blow molding station at least in part. A stretching unit stretches the pre-forms along their longitudinal direction and includes a stretch bar movable with respect to the plastics material pre-forms. The stretch bar is insertable into the pre-forms. The station has a receiving space with a wall for receiving the stretch bar, which is movable relative to the receiving space and which surrounds the stretch bar at least in part. A flexible sealing device, which separates a sterile room area from a non-sterile room area, is arranged inside the receiving space.