Better joining of metal to plastic

Rimless spectacles will benefit from a new laser joining process

Rimless spectacles will benefit from a new joining process, which uses lasers to form a better bond between the metal arm and plastic lens.

Liftec, a new process developed by researchers at the Fraunhofer Institute for Laser Technology ILT in Aachen, is unveiled this week at the Productronica show in Germany.

A laser heats the end of the metal pin that attaches the arm to the lens. The beam penetrates the transparent plastic lens without damaging it, and heats the metal pin to a temperature above the melting point of the plastic.

“The heat radiated by the pin melts the surrounding material, and mechanical pressure is applied to push the metal part into the plastic,” says ILT engineer Jens Holtkamp. “As the joint cools, a positive bond is formed between the two parts.”

Lou Reade

This material is protected by MA Business copyright
See Terms and Conditions.
One-off usage is permitted but bulk copying is not.
For multiple copies contact the sales team.


Supporting Information
Do you have any comments about this article?

Your comments/feedback may be edited prior to publishing. Not all entries will be published.
Please view our Terms and Conditions before leaving a comment.

© MA Business Ltd (a Mark Allen Group Company) 2021