Device for producing plastic containers by stretch blow forming

US6926506B2 · kind B2 · utility

Assignee

• Tetra Laval Holdings & Finance S.A. · CH

Inventors

• Dominique Chatard · Heidelberg, DE
• Jens Fuchs · Uelversheim, DE
• Hans Kindinger · Bensheim, DE
• Rolf Kuhn · Ingelheim am Rhein, DE
• Rudiger Wlach · Büttelborn, DE
• Lothar Wilhelm · Karben, DE

Key dates

• Filing date: Dec 14, 2001
• Grant date: Aug 9, 2005
• Expiry date: Aug 8, 2022

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29K2067/00
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a device for producing containers from a plastic material that can be shaped by means of stretch blow forming and whose inner space corresponds to the finished container, said container being retained on its open end by a receiving element with gas flow pipes. A moveable stretch die (1) is axially guided through the receiving element and an ignition device is mounted in order to ignite an explosive gas mixture inside the container. In order to produce plastic containers having a better outer appearance, such as a substantially clear, transparent wall, and improve reliability of production, the receiving element can be engaged in a fluidically tight manner with the main distribution block (2) by the end thereof that faces the container, the stretching die (1) being movably guided through said distribution block in the axial extension of the receiving element. At least one first fluidic connection (13) is provided in a first area of the main distribution block (2) facing away from the container, and an additional fluidic connection (14) is provided in an opposite second area of the main distribution block (2) facing the container. The pipes (26, 14, 15) from …