Method for producing thermoplastic foam panels by means of at least two heating elements offset in parallel with each other

US10000014B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Dietrich Scherzer · Neustadt, DE
• Tim DIEHLMANN · Bad Kötzting, DE
• Franz-Josef Dietzen · Haßloch, DE
• Carsten SANDNER · Bad Dürkheim, DE
• Herbert Schall · Lichtenfels, DE

Key dates

• Filing date: Jul 17, 2014
• Grant date: Jun 19, 2018
• Expiry date: Jun 21, 2035

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29K2105/0026
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The present invention relates to a process for the production of at least two-layer thermoplastic foam sheets via thermal welding of at least two thinner thermoplastic foam sheets. In the process of the invention, at least two heating elements are conducted on mutually offset planes between the surfaces to be welded of the thinner thermoplastic foam sheets, and the foam sheets here do not touch the heating elements. The number of layers of the thermoplastic foam sheet is per se a result of the number of thinner thermoplastic foam sheets that are thermally welded to one another. If by way of example three thinner thermoplastic foam sheets are thermally welded to one another, a three-layer thermoplastic foam sheet is per se obtained, and if there are four thinner thermoplastic foam sheets the result is accordingly per se a four-layer thermoplastic foam sheet.