Method and apparatus for thermally joining thermoplastic fiber composite components, and cover for a pressurization device suitable for this purpose

Patent metadata

Field	Value
Publication number	US-12036748-B2
Application number	US-202217867176-A
Country	US
Kind code	B2
Filing date	Jul 18, 2022
Priority date	Mar 13, 2018
Publication date	Jul 16, 2024
Grant date	Jul 16, 2024

Abstract

An apparatus for thermally joining thermoplastic fiber composite components includes a pressurization arrangement for jointly covering, at least in a region of a joining zone, thermoplastic fiber composite components to be joined and applying pressure to the thermoplastic fiber composite components to press the thermoplastic fiber composite components against one another, at least in the joining zone, the pressurization arrangement being flexible, at least in some section or sections. A welding device is configured for welding the fiber composite components in the joining zone during pressurization. The pressurization arrangement and welding device are configured to weld the thermoplastic fiber composite components in a pressurized state in the joining zone. The pressurization arrangement is configured to maintain pressurization independently of the welding device until the joining zone solidifies. A cover is also disclosed for a pressurization device for thermally joining thermoplastic fiber composite components.

First claim

The invention claimed is:

1. An apparatus for thermally joining thermoplastic fiber composite components, the apparatus comprising:
a pressurization arrangement for jointly covering, at least in a region of a joining zone, thermoplastic fiber composite components to be joined and applying pressure to the thermoplastic fiber composite components to press the thermoplastic fiber composite components against one another, at least in the joining zone, the pressurization arrangement being flexible, at least in some section or sections; and
a welding device configured for welding the thermoplastic fiber composite components in the joining zone during pressurization;
wherein the pressurization arrangement and the welding device are configured to weld the thermoplastic fiber composite components in a pressurized state in the joining zone;
wherein the pressurization arrangement is a vacuum arrangement configured to maintain pressurization independently of the welding device by applying a vacuum until the thermoplastic fiber composite components in the joining zone solidify;
wherein the welding device is a resistance welding device, and the vacuum arrangement has a cover for maintaining the vacuum on a top side and/or a bottom side of the thermoplastic fiber composite components, wherein the cover comprises a substantially flat and flexible directionally conductive diaphragm that is electrically conductive in a direction normal to a main surface of the cover and is electrically insulating in directions along the main surface of the cover, and wherein the cover is configured to transmit a welding current of the welding device into the joining zone while maintaining an airtight connection over the thermoplastic fiber composite components during the applying of the vacuum.

Assignees

• Premium Aerotec Gmbh

Inventors

• Kuntz Julian
• Geipel Thomas

Classifications

• B30B5/02

  wherein the pressing means is in the form of a flexible element, e.g. diaphragm, urged by fluid pressure · CPC title

• B32B37/1018

  using only vacuum · CPC title

• B32B37/06

  characterised by the heating method · CPC title

• H05B3/0023

  for heating by passing the current directly across the material to be heated · CPC title

• H05B3/0004

  Devices wherein the heating current flows through the material to be heated (Circuit arrangements for heating by passing the current directly across the material to be heated H05B3/0023; granular, powdered or fluid material H05B3/60) · CPC title