New Demolding Concepts for the Injection Molding of
Microstructures
Walter Michaeli, Ralf Gärtner
Pontstraße 49, 52062
1. Abstract
Communication and information technology
are branches of industry with a high potential for growth and innovation.
Micro-structured light guiding elements made from plastics can e.g. help to
improve display technology referring to illumination. For the complete
automated production of technical parts like this, the injection molding process shows a high potential. In injection molding especially a high mold
surface temperature is a precondition for the accurate reproduction of such
microstructures. Therefore, in these investigations, the use of a dynamic
heating system by induction was analyzed to heat the cavity surface
efficiently. Even though the accurate production of complex micro-structures
has been mastered; a non-destructive demolding-process
can cause serious problems. Therefore new demolding
technologies are analyzed using different demolding
principles.