Apparatus and method for shaping plastics material preforms

US9050744B2 · kind B2 · utility

Assignee

• KRONES AG · DE

Inventors

• Florian Geltinger · Donaustauf, DE
• Juergen Soellner · Beratzhausen, DE
• Yasin Kerim · Königsbrunn, DE

Key dates

• Filing date: Jun 22, 2012
• Grant date: Jun 9, 2015
• Expiry date: Mar 2, 2033

Classification

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

Abstract

At least one blow-molding station is arranged on a conveying device. The blow-molding station includes a blow-mold that forms a cavity into which plastics material pre-forms are expanded by a gaseous medium, supplied by a stressing device. A clean room at least partially surrounds the blow-molding station. A stretching unit stretches the plastics material pre-forms along their longitudinal direction with a stretch bar that is insertable into the plastics material pre-forms. The stretching unit includes a drive device for moving the stretch bar. The blow molding station includes a receiving space with at least one wall for receiving the stretch bar. In operation, the drive device is positioned outside the receiving space at least part of the time. A gaseous medium at a pressure higher than ambient pressure in a non-sterile environment of the receiving space is supplied to the receiving space.