Fraunhofer-Gesellschaft

Publica

Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

Formwerkzeug und Verfahren zu seiner Verwendung

Molding tool for molding article made of chalcogenide glass or optical glass, comprises base body made of first material, where partial surface of base body is provided with first coating containing second material, and contact element
 
: Denter, J.; Hagen, J.; Burmeister, F.; Fromm, A.

:
Frontpage ()

DE 102009027341 A: 20090630
DE 102009027341 A: 20090630
B29C0033
C03B0011
B29C0045
Deutsch
Patent, Elektronische Publikation
Fraunhofer IWM ()

Abstract
(A1) Die Erfindung betrifft ein Formwerkzeug, welches zumindest einen Grundkoerper aus einem ersten Material enthaelt, wobei zumindest eine Teilflaeche des Grundkoerpers mit zumindest einer ersten Beschichtung versehen ist, welche ein zweites Material enthaelt, und das Formwerkzeug weiterhin zumindest ein Kontaktelement enthaelt, welches zumindest mit einer Teilflaeche der Beschichtung verbunden ist, so dass die Beschichtung ueber das Kontaktelement mit einer elektrischen Stromquelle verbindbar ist. Weiterhin betrifft die Erfindung ein Verfahren zur Herstellung eines Formlings, bei welchem ein solches Formwerkzeug verwendet wird, wobei die erste Beschichtung mittels einer Widerstandsheizung auf eine vorgebbare erste Temperatur ermwaermt wird, wenn das Rohmaterial der Formlings mit einer zweiten Temperatur in die Kavitaet eingebracht wird, wobei das Rohmaterial dort nach Abbschalten der Widerstandsheizung auf eine dritte Temperatur abkuehlt.

 

EP 2269793 A1 UPAB: 20110119 NOVELTY - The molding tool (10) comprises a base body (11) made of a first material, where a partial surface of the base body is provided with a first coating (22) containing a second material, a contact element connected with the partial surface of the coating, so that the coating is connectable over the contact element with an electrical current source. The base body contains a cavity (14). The first coating has a specific resistance of less than 1 Ohm cm. A second coating is disposed between the surface of the base body and the first coating at the partial surface and contains a third material. DETAILED DESCRIPTION - The molding tool (10) comprises a base body (11) made of a first material, where a partial surface of the base body is provided with a first coating (22) containing a second material, a contact element connected with the partial surface of the coating, so that the coating is connectable over the contact element with an electrical current source. The base body contains a cavity (14). The first coating has a specific resistance of less than 1 Ohm cm. A second coating is disposed between the surface of the base body and the first coating at the partial surface and contains a third material, which has a larger specific resistance than the second material. The third coating is applied on the surface of the first coating at the partial surface and contains a fourth material, which has a larger specific resistance than the second material. A thermoelement is arranged on the surface of the third coating and/or the first coating. The first coating, second coating and/or the third coating have a thickness of more than 100 nm, and are implemented as layer system with individual layers. The contact element contains an adhesive mediator layer, a soldering layer and/or an oxidation protective layer. An INDEPENDENT CLAIM is included for a method for producing a molded article. USE - Molding tool for molding an article made of chalcogenide glass or optical glass or made of thermoplastic, duroplastic or elastomer (all claimed). ADVANTAGE - The molding tool is capable of rapidly and simply molding the article with less energy consumption.

: http://publica.fraunhofer.de/dokumente/N-159215.html