Patent EP-2289652-A1 (EP)
Inventor: WEHNING RALF
IPC: B29C67/00
Filed: 2009-08-25
Abstract: The method for the production of product such as dental prostheses and auxiliary elements, with individual geometry, comprises providing a substrate plate, which is subdivided into a first substrate plate segment and a further substrate plate segment, where the segments (112a, 112b, 112c) are detachably connected to each other or with a base carrier, producing a first product on the first substrate plate segment through successive coating of material layers on the first plate segment and selective hardening of pre-determined areas of each coated material layers after the application. The method for the production of product such as dental prostheses and auxiliary elements, with individual geometry, comprises providing a substrate plate, which is subdivided into a first substrate plate segment and a further substrate plate segment, where the segments (112a, 112b, 112c) are detachably connected to each other or with a base carrier, producing a first product on the first substrate plate segment through successive coating of material layers on the first substrate plate segment and selective hardening of pre-determined areas of each coated material layers after the application, and producing a further product on a further substrate plate segment through successive coating of material layers on the further substrate segment and selective hardening of pre-determined areas of each coated material layers after the application. The products are produced on the surface (121) of the substrate plate by selective sintering or melting, where the material is applied in successive layers. After each layer application, one or more determined areas are selectively hardened by an energetic radiation and are connected with one or more areas of the underlying layers. The pre-determined areas are pre-determined based on cross-sectional geometry of the product in the respective layer. The substrate plate segments are provided next to one another so that no material is penetrated through between the substrate plate segments, which are formed as segment by an endless conveyor device. The materials are applied in a first finishing section in a quasi continuous process on the substrate plate and are quasi continuously taken in a second fabrication section. In a first process step, a material layer is applied on substrate plate segments so that within the first substrate plate segment, a first layer section is applied and within the further substrate plate segment, a corresponding further substrate section is applied. In the second process step, a material layer is selectively hardened. The maximum interval between the first substrate plate segment and the layer section applied for the production of the first product differs itself from the maximum interval between the further substrate plate segment and the layer section applied for the production of the further product. Between the substrate plate segments, a separation wall is provided, which separates the building area existing above the substrate plate segments from the building area existing above an adjoining substrate plate segments. The separation wall is produced through hardening the coating materials during the production process of the product. Before each material coating, the hardened areas of the layer are smoothed. For hardening the products, a single radiation source is utilized. Each substrate plate segment is lowered and raised during the production process by a lifting device in a vertical direction and the lifting and lowering movement of the substrate plate segments is independently carried out. The substrate plate segments are coated in a process with an individual material coating device with material. An independent claim is included for a device for the production of product such as dental prostheses and auxiliary elements, with individual geometry.