Ivoclar Vivadent Ag

Technische Universitāt Wien

Io Tech Group Ltd.

Wolfgang Josef Wachter

Volker Rheinberger

Gottfried Rohner

Johannes Patzer

Jürgen Stampfl

Christoph Appert

Norbert Moszner

Robert Liska

Christian Ritzberger

Wolfram Höland

Michael Zenou

Walter Pokorny

Lorenz Josef Bonderer

Jürgen Rudolf Laubersheimer

Jörg Ebert

Johannes Homa

Gerhard Zanghellini

Elke Apel

Urs Karl Fischer

Robert Grünenfelder

Frank Müller

Klaus Galehr

Markus Lichtensteiger

Peter Kunkel

Lukas Enggist

Axel Kammann

Dieter Voser

Ralf Suffel

Gerald Mitteramskogler

Werner Längle

Stéphane Follonier

Jürgen Lauberscheimer

Jürgen Laubersheimer

Johannes Benedikt

The invention relates to a material for use as construction material for energy-pulse-induced transfer printing, which contains (a) at least one polymerizable binder, (b) at least one volume expansion component, (c) at least one initiator for the polymerization and (d) preferably at least one energy transformation component. The invention furthermore relates to a process for producing three-dimensional objects using the material.

Process and material for producing 3D objects by energy-pulse-induced transfer printing

A material for use as support material for energy-pulse-induced transfer printing, which contains (a) at least one energy transformation component, (b) at least one volume expansion component and (c) at least one binder and which has a viscosity at 25° C. of from 0.2 Pas to 1000 Pas and a surface tension at 25° C. of from 20 to 150 mN/m. The invention furthermore relates to a process for producing three-dimensional objects using the support material.

Process for energy-pulse-induced transfer printing

Support material for energy-pulse-induced transfer printing

The invention relates to a material for use as support material for energy-pulse-induced transfer printing, which contains (a) at least one energy transformation component, (b) at least one volume expansion component and (c) at least one binder and which has a viscosity at 25&#xb0; C. of from 0.2 Pas to 1000 Pas and a surface tension at 25&#xb0; C. of from 20 to 150 mN/m. The invention furthermore relates to a process for producing three-dimensional objects using the support material.

A method and a device for processing a light-polymerizable material () for building up an object () in layers, using a lithography based generative manufacture having a construction platform () for building up the object (), a projecting exposure unit () that can be controlled for locally selected exposing of a surface on the construction platform () to an intensity pattern having a prescribed shape, and a control unit () prepared for polymerizing overlapping layers () on the construction platform () in successive exposure steps, each having a prescribed geometry, by controlling the projecting exposure unit (), in order to thus successively build up the object () in the desired shape, said shape resulting from the sequence of layer geometries. The invention is characterized in that a further exposure unit () for exposing the surface of the construction platform () is provided on the side opposite the projecting exposure unit (), and that the construction platform () is designed to be at least partially transparent to light, and that the control unit () is designed for controlling the further exposure unit () at least while building up the first layer (), said layer adhering to the construction platform (), for exposing in the prescribed geometry.

Device and method for processing light-polymerizable material for building up an object in layers

The invention relates to a method for the construction of a shaped body from photopolymerizable material by using lithography-based generative production, in which a layer of liquid photopolymerizable material is defined on a production platform, and is polymerized in an exposure region having a predetermined contour, a further layer of photopolymerizable material is defined, the layer defined last is polymerized in an exposure region having a predetermined contour for the layer defined last, and the latter two steps are repeated until a shaped body having a predetermined shape has been formed by the sequence of cured layers with contours predetermined layer by layer, each exposure in an exposure region having a predetermined contour being carried out by controlled activation of individual exposure elements in a two-dimensional array of exposure elements, each exposure element being assigned an image element, wherein the exposure of the exposure region is carried out by a common light source and by a two-dimensional light intensity modulator which is illuminated by the light source and which has a grid of individually controllable intensity modulators, in such a way that each illuminated intensity modulator forms and exposure element that exposes an image element in the exposure region, wherein a two-dimensional matrix is compiled for each exposure step of a layer, each element of the matrix being assigned to an exposure element in the array of exposure elements and control instructions for this exposure element being obtained in the form of a time-dependent function which individually establishes the intensity profile of the radiation of the exposure element over the exposure step, characterized in that, if a component of the intensity variation common to all time-dependent function of the intensity profiles of all exposure elements to be activated exists as a general intensity variation in an exposure step, this general intensity variation is carried out by controlling the intensity of the light source in accordance with the general intensity variation.

Method for the construction of a shaped body

The invention relates to a method for the construction of a shaped body from photopolymerizable material by using lithography-based generative production (rapid prototyping), in which a layer of liquid photopolymerizable material is defined on a production platform (), the layer is polymerized in an exposure region having a predetermined contour by exposure, a further layer of photopolymerizable material is defined on the polymerized layer, the layer defined last is polymerized by exposure in an exposure region having a predetermined contour for the layer defined last, and the latter two steps are repeated until a shaped body having a predetermined shape has been formed by the sequence of cured layers with contours predetermined layer by layer, wherein ink is applied onto at least one layer inside the predetermined contour, wherein the production platform is suspended moveably and wherein the production platform is brought, after the polymerization of a layer in a processing station for polymerizing a layer, by movement to an ink application station as a further processing station in which ink is applied position-selectively to the layer formed last, after which the production platform is moved again to the processing station for polymerizing a further layer, characterized in that the movement of the production platform between various processing stations is carried out by rotating a drum-shaped carrier which holds the production platform on its circumference, around a horizontal or vertical axis of rotation, wherein the processing stations are disposed distributed around the axis of rotation of the drum shaped carrier.

A process for the preparation of a ceramic or glass ceramic shaped article using stereolithography and using a slip based on a radically polymerizable binder, polymerization initiator and filler, which comprises (A) at least one acidic monomer of general formula I (B) photoinitiator, and (C) ceramic and/or glass ceramic particles.

Light-curing ceramic slips for the stereolithographic preparation of high-strength ceramics

The invention relates to the use of a composite resin composition comprising The invention also relates to a process for the stereolithographic production of a dental shaped part and the use of the composite resin composition in this process.

Process for producing a dental shaped part by stereolithography

The invention relates to a device for production of dental molded parts from a polymerizable plastic, with a flask () and with a heating device () for heating the polymerizable plastic in the flask (). The heating device () is movable relative to the flask ().

Device and method for production of dental molded parts

Cuvette system

The invention relates to a method for the layered construction of a shaped body made of highly viscous photopolymerizable material.

Method for the layered construction of a shaped body made of highly viscous photopolymerizable material

A method and a device for processing light-polymerizable material for the assembly of a mold, utilizing a lithography-based generative manufacturing technique wherein a layer of a light-polymerizable material, the material being located in at least one trough () having a particularly light-transmissive, horizontal bottom (), is polymerized by illumination on at least one horizontal platform (), the platform having a prespecified geometry and projecting into a trough (), in an illumination field, wherein the platform () is displaced vertically to form a subsequent layer, light-polymerizable material is then added to the most recently formed layer, and repetition of the foregoing steps leads to the layered construction of the mold in the desired form, which arises from the succession of layer geometries. The invention is characterized in that the trough () can be shifted horizontally to a supply position, and the supply device () brings light-polymerizable material at least to an illumination field of the trough bottom (), before the at least one trough () is shifted to an illumination position in which the illumination field is located below the platform () and above the illumination unit (), and illumination is carried out.

Growing community of inventors

Schaan, Liechtenstein

Wolfgang Josef Wachter