Dentsply Sirona Inc.

Sirona Dental Systems Gmbh

Thomas Hasenzahl

Franz Basler

Christian Schmidt

Joachim Pfeiffer

Peter Fornoff

Torsten Richter

Axel Schwotzer

Andreas Ries

Hans-Christian Schneider

Thomas Michalica

Bernhard Kaufmann

Christian Stahl

Gerd Helmreich

Markus Kuhnle

Michael Schwaiger

Tobias Schulz

Helmut Seibert

Mathias Morgenroth

A 3D printer comprising a resin vat, a component carrier, a transport box for depositing the component carrier, a transport device for removing the component carrier from the transport box and transporting it into the resin vat, and for moving the component carrier downward and upward in the resin vat The transport device has translatory axes in the vertical and horizontal directions, each of which can be driven independently by a motor, the transport device having a locking device that detachably connects the component carrier. The locking device, during the downward movement along the vertical translatory axis, reaches a specific position (P) by the drive of the respective motor, at which a stop located on the vertical translatory axis sets a coupling element in motion. A spring-loaded locking pin arranged in contact with the coupling element is immersed in a bayonet opening of the component carrier by the movement. The immersed locking pin can be brought into a locking position in the bayonet opening via the horizontal translatory axis.

Device for receiving and fixing the component carrier of a 3D printer by utilitizing existing axes of motion

A stereolithography apparatus for generating a three-dimensional object from a photocurable substance, that includes: a vat for storing the photocurable substance; and a platform for supporting the three-dimensional object, wherein the platform is movable relative to the vat; an optical unit for sequentially projecting layered images towards the photocurable substance for hardening the photocurable substance deposited between the three-dimensional object and the bottom of the vat; and further includes: an oscillation unit adapted to horizontally oscillate the vat concomitantly with the projection of the layered images with a substantially constant amplitude that is smaller than the pixel size of the layered images in the horizontal direction for preventing adhesion of the three-dimensional object to the bottom of the vat.

Stereolithography apparatus for preventing adhesion of a 3D-object to the vat through oscillatory excitations

Component carrier for an additive manufacturing device, wherein the component carrier comprises a construction surface, on which a component to be manufactured is disposed during the operation of the manufacturing device, wherein the component carrier comprises a sealing surface which radially surrounds the construction surface, and method for post-processing a component manufactured according to an additive manufacturing process using such a component carrier.

Transportable assembly unit for an additive manufacturing device

Material unit for an additive manufacturing device (AM) having a resin vat, wherein the resin vat comprises a base which is transparent at least in sections, wherein the resin vat is connected to a holder for a reservoir, and wherein the holder is configured such that resin (R) emerging from an outlet of a reservoir held by said holder can flow into the resin vat.

Material unit for an additive manufacturing device

Device for a system for layer-by-layer construction of a body (K) from a substance (S) which can be hardened by radiation, comprising a vat having a vat base for receiving the substance (S) which can be hardened by radiation, comprising a building platform which is arranged above the vat base and which is height-adjustable in relation to the vat base and comprising a sensor cooperating with the vat base, wherein the vat base is configured to be at least partially flexible, wherein a chamber is provided wherein the chamber is delimited by an underside of the vat base, wherein the sensor is adapted to detect a volume change of the chamber and to provide a sensor signal from which a sign of the volume change can be determined.

Detection of deformation of vats

The present invention relates to dental machining apparatus () for blanks () comprising a tool spindle () having an axis of rotation () and mounted in a bearing housing () disposed on the machine housing side. A force sensor () is also provided, which is disposed between the tool spindle () and the bearing housing () for the purpose of detecting the machining force acting on the tool spindle (), wherein the tool spindle () can be supported against the bearing housing () directly or indirectly via the force sensor ().

Dental machining unit with tool spindle

A dental machining device () having at least one shaft () which projects into a machining chamber () and is displaceable in both axial and radial directions includes a sealing element () having at least two axially spaced sealing lips () bearing against the shaft () in its peripheral direction and enclosing an annular chamber () with the shaft (). At least one fluid conduit () opens into the annular chamber () to supply a fluid () thereto. A pressure sensor () is provided for detecting a state variable of the fluid, which is detected and held ready for transmission to a control unit (&#x2033;).

Dental machining device and method for monitoring sealing elements in dental machining devices

Machine tool

An apparatus for recording medical objects, in particular for recording models of prepared teeth, comprising a position-sensitive sensor ( ), which is movable in the projection direction, with a projection unit and a receiving unit ( - - ), and with a certain triangulation angle (&agr;) located between the projection path of the rays ( ) of the projection unit ( - ) and the observation path of the rays ( ) of the receiving unit ( - ), and with the projection path of the rays ( ) aligned parallel to the direction of movement of the sensor ( ), is realized for the accurate recording action of edges and steep surfaces of the type that occur in tooth cavities with a triangulation angle (&agr;) that is smaller than 10&deg;, preferably smaller than 5&deg;.

Method and apparatus for recording medical objects, in particular for recording models of prepared teeth

Holding device for aligning and mounting a workpiece in an apparatus includes a receiving opening ( ) provided for the holding device ( ), means ( ) for positioning the holding device disposed in the receiving opening ( ) for determination of the position of the holding device in relation to the receiving opening, wherein the holding device ( ) is connected with a workpiece carrier ( ), wherein the workpiece carrier ( ) is adjustable relative to the holding device, and wherein optical means ( ) are provided for viewing of the workpiece and thereby alignment of the workpiece on the holding device is performed.

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Darmstadt, Germany

Thomas Hasenzahl