公开(公告)号：US20220134658A1

公开(公告)日：2022-05-05

申请号：US17431239

申请日：2020-02-25

Applicant: DENTSPLY SIRONA inc. ,  SIRONA DENTAL SYSTEMS GMBH

Inventor： Christian SCHMIDT ,  Thomas HASENZAHL ,  Michael SCHWAIGER ,  Markus KUHNLE ,  Andreas RIES

IPC: B29C64/255 ,  B33Y30/00 ,  B33Y50/00 ,  B33Y40/10 ,  B29C64/343 ,  B29C64/386 ,  B29C64/314 ,  G01F23/263

Abstract: 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.

公开(公告)号：US20220170697A1

公开(公告)日：2022-06-02

申请号：US17674074

申请日：2022-02-17

Applicant: DENTSPLY SIRONA Inc.

Inventor： Peter FORNOFF ,  Christian SCHMIDT

IPC: F27B17/02 ,  A61C13/20

Abstract: A sintering furnace for couponents made of a sintered material, in particular for dental components, having a furnace chamber having a chamber volume (VK). A heating device, a receiving space having a gross volume (VB) located in the chamber volume (VK) and delimited by the heating device, and a useful region having a useful volume (VN) located in the gross volume (VB), are disposed in the furnace chamber. The furnace chamber has an outer wall consisting of walls having a wall portion to be opened for introduction of a component to be sintered having an object volume (VO) into the receiving space. In the furnace chamber the heating device has a thermal radiator having a radiation field which is disposed on at least one side of the receiving space. At least the useful volume (NV) disposed in the receiving space is disposed in the radiation field of the radiator.

公开(公告)号：US20240375352A1

公开(公告)日：2024-11-14

申请号：US18577808

申请日：2022-07-12

Applicant: DENTSPLY SIRONA Inc.

Inventor： Thomas SCHAEFER ,  Christian STAHL ,  Christian SCHMIDT ,  Peter FORNOFF

IPC: B29C64/245 ,  B29C64/124 ,  B29C64/236 ,  B29C64/255 ,  B29C64/393 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02

Abstract: The disclosure relates to a 3D printer including: a vat having an at least partially transparent bottom for receiving liquid photoreactive resin for producing a solid component; a building platform for pulling the component layer by layer out of the vat; a projector for projecting the layer geometry onto the transparent bottom; a transport apparatus for moving the building platform at least downward or upward in the vat; and a receiving apparatus for detachably connecting the building platform to the transport apparatus. The receiving apparatus includes a pivoting device for pivotally holding the building platform and is adapted to abut the underside of the building platform parallelly onto the transparent bottom of the vat when lowered by the transport apparatus. The 3D printer is provided without for the ability to completely block the pivotal movement of the pivotably held building platform.

公开(公告)号：US20220032538A1

公开(公告)日：2022-02-03

申请号：US17280292

申请日：2019-10-01

Applicant: DENTSPLY SIRONA inc.

Inventor： Thomas MICHALICA ,  Thomas HASENZAHL ,  Christian SCHMIDT ,  Christian STAHL

IPC: B29C64/124 ,  B29C64/255 ,  B29C64/245 ,  B29C64/264 ,  B29C64/232 ,  B29C64/295 ,  B33Y30/00 ,  B33Y10/00

Abstract: Device (1) 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 (3) having a vat base (2) for receiving the substance (S) which can be hardened by radiation, comprising a building platform (4) which is arranged above the vat base (2) and which is height-adjustable in relation to the vat base (2) and comprising a sensor (5) cooperating with the vat base (2), wherein the vat base (2) is configured to be at least partially flexible, wherein a chamber (6) is provided wherein the chamber (6) is delimited by an underside of the vat base (2), wherein the sensor (5) is adapted to detect a volume change of the chamber (6) and to provide a sensor signal from which a sign of the volume change can be determined.

公开(公告)号：US20220134657A1

公开(公告)日：2022-05-05

申请号：US17431456

申请日：2020-02-28

Applicant: DENTSPLY SIRONA inc. ,  SIRONA DENTAL SYSTEMS GMBH

Inventor： Christian SCHMIDT ,  Thomas HASENZAHL

IPC: B29C64/25 ,  B29C64/35 ,  B29C64/255 ,  B29C64/264 ,  B29C64/295 ,  B29C64/371 ,  B29C64/129

Abstract: 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.

公开(公告)号：US20200171746A1

公开(公告)日：2020-06-04

申请号：US16621525

申请日：2018-06-21

Applicant: DENTSPLY SIRONA INC.

Inventor： Christian SCHMIDT

IPC: B29C64/255 ,  B29K105/00

Abstract: The invention relates to a container for holding a photosensitive liquid for use in a stereolithographic system in which a reference layer is exposed to radiation for the layer-by-layer or continuous creation of workpieces. At least one element of the container which is directly adjacent to the reference layer consists of at least one material which is at least partially transparent to the radiation and at least some of which has structures and/or pores which can receive and discharge, preferably also store, an inhibitor and/or an inhibitor mixture. Therefore, the element is not just able to supply the inhibitor but to a significant extent consists of the inhibitor itself, as a result of which the supplied flow is equalized or homogenized. Rapid or even continuous 3D printing is thus made possible in a cost-effective manner.

公开(公告)号：US20180051931A1

公开(公告)日：2018-02-22

申请号：US15550401

申请日：2016-02-12

Applicant: DENTSPLY SIRONA inc.

Inventor： Peter FORNOFF ,  Christian SCHMIDT

IPC: F27B17/02 ,  F27D99/00 ,  F27B5/14 ,  F27D11/02 ,  F27D11/06 ,  F27D11/08

CPC classification number: F27B17/025 ,  F27B5/14 ,  F27B17/0075 ,  F27D11/02 ,  F27D11/06 ,  F27D11/08 ,  F27D99/0006 ,  F27D2099/0008

Abstract: The invention relates to a sintering furnace (1) for components (15) made of a sintered material, in particular for dental components, comprising a furnace chamber (2) having a chamber volume (VK) and a chamber inner surface (OK), wherein a heat-up device (5), a receiving space (9) having a gross volume (VB) located in the chamber volume (VK) and delimited by the heat-up device (5), and a useful region (10) having a useful volume (VN) located in the gross volume (VB), are disposed in the furnace chamber (2). The furnace chamber (2) has an outer wall (3) consisting of a plurality of walls having a wall portion (7) to be opened for introduction into the receiving space (9) of a component to be sintered (15) and having an object volume (VO). In the furnace chamber (2) the heat-up device (5) has a thermal radiator (6) having a radiation field (13) which radiator is disposed on at least one side of the receiving space (9). Said thermal radiator (6) has a specific resistance of 0.1 Ωmm2/m to 1,000,000 Ωmm2/m and has a total surface, the maximum of which is three times the chamber inner surface (OK). With this sintering furnace (1) a heat-up temperature of at least 1100° C. can be achieved within 5 minutes at a maximum power input of 1.5 kW.