back to top
My wish lists
Save your wish list
If you want to add more content to your wish list, simply log in. If you do not have a user account, please register for the Hanser Customer Center.

» Do you already have a user account? Please log in here.
» Don't have a user account yet? Please register here.
Your wish lists
If you want to use your wish list during your next visit, simply log in. If you do not have a user account, please register for the Hanser Customer Center.
» Do you already have a user account? Please log in here.
» Don't have a user account yet? Please register here.

« Back

Your advantages at a glance

  • One login for all Hanser portals
  • Individual home page for faster access to preferred content
  • Exclusive access to selected content
  • Personal wish lists on all portals
  • Central management of your personal information and newsletter subscriptions

Register now
Deutsch
Bookmark Bookmarked
09-20-2007

Joining Plastics, Metal and Ceramics via Laser

A firm, positive connection results upon cooling

A firm, positive connection results upon cooling

An essential element of the so-called Liftec process that was developed at the Fraunhofer Institute for Laser Technology ILT is a component made of a material that has a higher melting point than the plastic to which it is to be joined. By absorbing laser radiation, this component is heated to a temperature above the melting point of the plastic. The component is then pressed against the plastic part mechanically. As a result, the plastic softens due to conduction of heat, allowing the non-plastic component to penetrate the plastic material. With selection of suitable component geometries, a firm, positive connection is created upon cooling.

Because of the high energy density of laser radiation, localized and rapid heating of the metal component is achieved. If the thermal radiation from the components is measured with the aid of a pyrometer, the specifically required temperature for the materials involved can be established. This results in stress-free components, among other benefits.

Heating by means of laser radiation is almost independent of the thermal conductivity and electrical conductivity of the material that is pressed in. Thus, in addition to metals, other materials such as ceramics can also be joined with plastics. Fields of application for the process include, for instance, joining of plastic eyeglass lenses with the frame, providing not only improved product integrity and insurance against loosening, but also new design opportunities. Joining of plastic windows or facades with a metal frame represents another potential application. Here, too, a high-strength, leak-proof joint can be achieved.

Dr.-Ing. Harald Sambale
sambale <AT> kunststoffe.de

contact
Fraunhofer-Institut für Lasertechnik ILT
Steinbachstr. 15
DE 52074 Aachen
Tel: +49 241 8906-0
Fax: +49 241 8906-121


Newsletter

Would you like to subscribe to our Newsletters on plastics technology and profit from the latest information?

Subscribe here

Subscribe here