Method and device for connecting fibre-reinforced webs

Patent metadata

Field	Value
Publication number	US-10926481-B2
Application number	US-201615781287-A
Country	US
Kind code	B2
Filing date	Dec 14, 2016
Priority date	Dec 17, 2015
Publication date	Feb 23, 2021
Grant date	Feb 23, 2021

Abstract

Method and device for connecting two webs (1), reinforced with unidirectionally oriented continuous fibres, by ultrasonic welding, wherein the fibres are embedded in a matrix of polycarbonate and the webs have abutting edges that are substantially square and substantially flat, characterized by the following steps:—arranging the webs abutting one another in the region of the abutting edges in a welding device between a sonotrode (2) and an anvil (3),—welding the webs by means of ultrasound, wherein the sonotrode and the anvil exert pressure on the webs to be welded in the melting region between the webs and perpendicularly to the abutting edges of the webs,—removing the welded-together webs (4) from the welding device.

First claim

The invention claimed is:

1. A sheeting article reinforced with unidirectionally aligned endless fibres which comprises a matrix of polycarbonate and which comprises at least one region as a melting region which has a lower content of fibres than the remaining regions of the sheeting article, wherein the content of fibres in the melting region is one half or less of the fibre content of the remaining regions of the sheeting article, wherein the melting regions are in the region of the abutting ends and are 0.1 mm to 3 mm deep measured perpendicularly to the abutting end inwards into the sheeting article.

2. A method comprising producing fibre-reinforced final sheetings by ultrasonic welding utilizing the sheeting article according to claim 1 in the configuration of a sheeting piece.

Assignees

• Covestro Deutschland Ag

Inventors

• Knaupp Matthias
• Grimm Thomas
• Börger Henning

Classifications

• B29C65/085

  using a rotary sonotrode · CPC title

• B29C66/81463

  comprising a plurality of single pressing elements, e.g. a plurality of sonotrodes, or comprising a plurality of single counter-pressing elements, e.g. a plurality of anvils, said plurality of said single elements being suitable for making a single joint · CPC title

• B29C65/086

  using a rotary anvil · CPC title

• B29C65/08 Primary

  using ultrasonic vibrations {(non-plastics element to plastics elements B29C65/645)} · CPC title

• B29C66/721

  Fibre-reinforced materials (B29C66/729 takes precedence) · CPC title