Abstract: A system for building a three dimensional green compact comprising a printing station configured to print a mask pattern on a building surface, wherein the mask pattern is formed of solidifiable material; a powder delivery station configured to apply a layer of powder material on the mask pattern; a die compaction station for compacting the layer formed by the powder material and the mask pattern; and a stage configured to repeatedly advance a building tray to each of the printing station, the powder delivery station and the die compaction station to build a plurality of layers that together form the three dimensional green compact.

Abstract: A method of printing a three-dimensional (3D) object and a support construction for the 3D object includes depositing a model material, layer-by-layer, on a fabrication platform, to print a first portion of the 3D object, and depositing a support material, layer-by-layer on the fabrication platform, to print the support construction, wherein, in a predetermined number of the deposited layers, the model material and the support material are deposited such that a gap is formed between a surface of the first portion of the 3D object and a surface of the support construction.

Abstract: A method for dynamically controlling layer thickness during an additive manufacturing process of building a block including an object with layers of powder material, detecting a height of the block after each layer is compacted, determining a delta between the detected height and a height in a computer model defining slices of the block and compensating for the determined delta in subsequent cycles. A cycle in the additive manufacturing process includes selectively printing a layer pattern, spreading a powder layer over the layer pattern with a spreader and compacting the powder layer with the layer pattern.

Abstract: Methods of fabricating three-dimensional objects featuring properties of a soft bodily tissue and three-dimensional objects featuring properties of a soft bodily tissue or of an organ comprising same are provided.

Abstract: The combination of 3D printing technology plus the additional dimension of transformation over time of the printed object is referred to herein as 4D printing technology. Particular arrangements of the additive manufacturing material(s) used in the 3D printing process can create a printed 3D object that transforms over time from a first, printed shape to a second, predetermined shape.

Abstract: A system for building a three dimensional green compact comprising a printing station configured to print a mask pattern on a building surface, wherein the mask pattern is formed of solidifiable material; a powder delivery station configured to apply a layer of powder material on the mask pattern; a die compaction station for compacting the layer formed by the powder material and the mask pattern; and a stage configured to repeatedly advance a building tray to each of the printing station, the powder delivery station and the die compaction station to build a plurality of layers that together form the three dimensional green compact.

Abstract: A method of additive manufacturing of a three-dimensional object. is disclosed. The method comprises sequentially forming a plurality of layers in a configured pattern corresponding to the shape of the object, thereby forming the object. The formation of each layer comprises dispensing at least one uncured building material, and at least partially curing the uncured building material, wherein for at least one layer, the curing is initiated at least t seconds after commencement of curing of a layer immediately preceding that layer. The t parameter is longer than the number of seconds required for the formation of the layer.

Abstract: An additive manufacturing system for building a green block including a three dimensional green usable model includes a printing station, a powder delivery station, a compacting station and a stage. The printing station prints a pattern on a building tray by selectively depositing a solidifiable non-powder material that forms a partition by tracing a perimeter of a usable model to be printed per layer and tracing a plurality of discrete sections of a support area around the usable model. The powder delivery station applies a layer of powder material over the pattern. The compacting station compacts per layer of powder material and includes a die for receiving the layer. The stage repeatedly advances the building tray to each of the printing station, the powder delivery station and the compacting station to build a plurality of layers that together form the green block.

Abstract: A method of printing a three-dimensional (3D) object and a support construction for the 3D object includes depositing a model material, layer-by-layer, on a fabrication platform, to print a first portion of the 3D object, and depositing a support material, layer-by-layer on the fabrication platform, to print the support construction, wherein, in a predetermined number of the deposited layers, the model material and the support material are deposited such that a gap is formed between a surface of the first portion of the 3D object and a surface of the support construction.

Abstract: A method for producing a three-dimensional model via additive manufacturing includes building a green block in a layerwise manner with a powder material and a solidifiable non-powder material. The green block includes a green usable model. The solidified non-powder material is removed from the green block to extract the green usable model from the green block and the density of the green usable model is increased by applying Cold Iso static Pressing (CIP). The green usable model is then sintered to produce a three-dimensional model.

Abstract: Some embodiments of the invention may be related to a system and method of printing a three-dimensional (3D) object and a support construction for the 3D object. The system may include a printing unit and a supply system for supplying a body material and a support material to the printing unit. The system may further include a controller be configured to: generate 3D cross sectional digital data comprising a set of horizontal slices, to manipulate the 3D digital data to create a set of shifted slices by performing vertical shifts between body regions and support regions of a same horizontal slice to create printing digital data and to control the printing unit to deposit, in layers, the body material and the support material based on the printing digital data, wherein in a single scan, droplets of the support material and droplets of the body material travel different distances.

Abstract: A system for building a three dimensional green compact comprising a printing station configured to print a mask pattern on a building surface, wherein the mask pattern is formed of solidifiable material; a powder delivery station configured to apply a layer of powder material on the mask pattern; a die compaction station for compacting the layer formed by the powder material and the mask pattern; and a stage configured to repeatedly advance a building tray to each of the printing station, the powder delivery station and the die compaction station to build a plurality of layers that together form the three dimensional green compact.

Abstract: Methods of fabricating three-dimensional rubber-like objects which utilize one or more modeling material formulations which comprise an elastomeric curable material and silica particles are provided. Objects made of the modeling material formulations and featuring improved mechanical properties are also provided.

Abstract: A system for building a three dimensional green compact comprising a printing station configured to print a mask pattern on a building surface, wherein the mask pattern is formed of solidifiable material; a powder delivery station configured to apply a layer of powder material on the mask pattern; a die compaction station for compacting the layer formed by the powder material and the mask pattern; and a stage configured to repeatedly advance a building tray to each of the printing station, the powder delivery station and the die compaction station to build a plurality of layers that together form the three dimensional green compact.

Abstract: A method of additive manufacturing of a three-dimensional object. is disclosed. The method comprises sequentially forming a plurality of layers in a configured pattern corresponding to the shape of the object, thereby forming the object. The formation of each layer comprises dispensing at least one uncured building material, and at least partially curing the uncured building material, wherein for at least one layer, the curing is initiated at least t seconds after commencement of curing of a layer immediately preceding that layer. The t parameter is longer than the number of seconds required for the formation of the layer.

Abstract: A material composition, which may be a support material, for three-dimensional (3D) inkjet printing is disclosed. The material composition may comprise a glycol polymer, a low molecular weight polar substance and a surface-active agent. The glycol polymer may be polyethylene glycol (PEG) having a molecular weight between about 1000 and about 6000 and the low molecular weight polar substance may be dimethyl hexanediol.

Abstract: The method comprises sequentially forming a plurality of layers in a configured pattern corresponding to the shape of the object, thereby forming the object. The formation of each layer comprises dispensing at least one uncured building material, and at least partially curing the uncured building material, wherein for at least one layer, the curing is initiated at least t seconds after commencement of curing of a layer immediately preceding that layer. The t parameter is longer than the number of seconds required for the formation of the layer.

Abstract: Some embodiments of the invention may be related to a system and method of printing a three-dimensional (3D) object and a support construction for the 3D object. The system may include a printing unit and a supply system for supplying a body material and a support material to the printing unit. The system may further include a controller be configured to: generate 3D cross sectional digital data comprising a set of horizontal slices, to manipulate the 3D digital data to create a set of shifted slices by performing vertical shifts between body regions and support regions of a same horizontal slice to create printing digital data and to control the printing unit to deposit, in layers, the body material and the support material based on the printing digital data, wherein in a single scan, droplets of the support material and droplets of the body material travel different distances.

Abstract: A system includes a three-dimensional (3D) printer, a processor configured to compute object data for printing the object and a controller. The object data is defined in a layer-wise manner and the object data of one layer defines selective dispensing to different distances. The controller is configured to control the dispensing of the building material in the layer-wise manner based on the object data. The printing includes a dispensing unit for selectively dispensing building material in a layer-wise manner for building the object and a building tray for supporting the dispensed material for building the object. The printing further includes use of a prefabricated support structure, and printing at least a portion of the object over the prefabricated support structure.

Abstract: Provided are methods of fabricating an object, effected by jetting two or more different compositions, each containing a different material or mixture of materials, which, when contacted on a receiving medium, undergo a chemical reaction therebetween to form the building material. The chemical composition of the formed building material is dictated by a ratio of the number of voxels of each composition in a voxel block. Systems for executing the methods, and printed objects obtained thereby are also provided.