Method and device for joining workpieces made from plastic in three-dimensional form by means of a laser beam
US7211166B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 22, 2003 |
| Grant date | May 1, 2007 |
| Priority date | — |
| Expiry date | Sep 29, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2995/0027
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for joining workpieces made from plastic, the upper workpiece, facing a laser source, consisting of a material transparent to the laser beam, and the lower workpiece consisting of a material absorbent to the laser beam, such that the mutually bordering contact surfaces for the two workpieces melt and are joined to one another under pressure during a subsequent cooling, the guiding of the laser beam onto the site to be joined, and the mechanical compression of the workpieces being carried out simultaneously by a machining head. The corresponding device comprises a machining head with focussing devices for the laser beam onto the contact surface, and pressure-exerting devices for compressing the workpieces. A rotatably mounted glass ball or roller is particularly suitable as pressure-exerting device. The invention permits welding quality to be assured in conjunction with flexibility of the welding operation without expensive and complicated damping balls.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.