Abstract: Process for layer-wise production of a three dimensional body (generative rapid prototyping), in particular by 3D binder printer, including a multiple succession of the steps of depositing a powder particle layer, activating in defined areas an adhesive present on the powder particles and/or in the powder particle coating, as well as adhering the powder particles to each other and to the layer thereunder, wherein the powder particle layer is electrically discharged by ionized particles and brushed flat by means of an electrically insulated blade prior to activation of the adhesive material, and the invention further concerns a device adapted for application of thin powder particle layers, including at least one ionizing device.

Abstract: Process for production of three dimensional bodies of particles by a layer buildup process (powder based generative rapid prototyping process), wherein the layer buildup is monitored by an optical control device, which evaluates the light intensity or color differences within and between deposited or hardened particle layers, as well as a suitable optical control device, and further yet, particles or binder liquid particularly suited for optical quality control.

Abstract: The invention concerns a process for producing a mold, wherein a hollow space is formed within a rigid mold frame (2) which corresponds to the shape of the component to be produced. According to the invention one fills the mold frame, with the exception of an area which surrounds and is in close proximity to the hollow space, with a plurality of filler elements (6), which are formed into at least an essentially incompressible shape. Subsequently, a model (8) of the component to be produced is introduced into the mold and the interstitial space between the model and the filler elements is filled with a masking material or mold shell forming material (4).

Abstract: The present invention relates to a method and a device for selective laser sintering in which powder is introduced in layers into a jacketed design space, forming a powder cake which is consolidated layerwise by laser radiation. The design space is encircled and heated by a jacket heating device.

Abstract: A device and process for sintering a powder with a laser beam, and in particular, a rapid prototyping process involving selective laser sintering (SLS), with reduction in non-homogeneities, i.e., grooves or hollows due to complete melting of powder or poor material characteristics due to insufficient melting of powder. The problem is solved by a process and a device for homogenization of the temperature distribution in the part during its manufacture. For this, the temperature of the sinter powder is detected in the sinter point and the power of the laser is controlled depending upon the detected temperature. Geometric changes of the moveable detection area, as well as the changes in the chromatic adjustment, and beam correcting errors, all of which occur depending upon the position of the detection area on the upper surface of the powder bed, are taken into consideration. Thereby a more realistic determination of the temperature values is made possible from the measured temperature values.

Abstract: Device and process for sintering a powder with a laser beam. In the field of design and prototyping, and the in particular in industrial model construction, the development of new types of more rapid production methods are continuously being sought. One category of this type of rapid production methods is referred to as the rapid prototyping process. This category includes selective laser sintering (SLS).

Abstract: The present invention relates to a method and a device for selective laser sintering in which powder is introduced in layers into a jacketed design space, forming a powder cake which is consolidated layerwise by laser radiation. The design space is encircled and heated by a jacket heating device.

Abstract: A material system for use in a 3D-printing, which exhibits a higher form stability. The material system contains binder and solvent as well as optional filler materials. The binder is soluble in the solvent, as well as two complementary polyelectrolytes, and/or an initiator for a cross linking reaction of the binder. The advantage of such a mixed material system is comprised in the essentially higher binder force between the individual particles. This enhanced binder force results either from the acid-base linkages, which form between the complementary polyelectrolytes, or from the supplemental networking initiated by the initiators, or from both. Substantially higher binding forces between the individual particles means at the same time a substantially higher shape stability of the 3D-printing product.

Abstract: The invention concerns a process for producing a mold, wherein a hollow space is formed within a rigid mold frame (2) which corresponds to the shape of the component to be produced. According to the invention one fills the mold frame, with the exception of an area which surrounds and is in close proximity to the hollow space, with a plurality of filler elements (6), which are formed into at least an essentially incompressible shape. Subsequently, a model (8) of the component to be produced is introduced into the mold and the interstitial space between the model and the filler elements is filled with a masking material or mold shell forming material (4).