Abstract: A stereolithography machine includes a support structure arranged resting on a substantially horizontal support plane having a reference direction, a tank, having a bottom, coupled with the support structure, a support group coupled with the support structure for the movement above the tank of a modelling plate so that the modelling surface of the modelling plate faces the bottom in a substantially parallel position. The tank includes a recirculation circuit configured to move a photosensitive liquid substance contained in the tank from a first end to a second end of the tank, both defined along the reference direction, to carry out inside the tank a continuous recirculation of the resin that, by gravity, flows out from the first end at a greater height, to the second end at a lower height, and the same resin is returned by the recirculation circuit from the second end to the first end.

Abstract: An investment casting model for the creation of a mold for investment casting of a plurality of objects, the investment casting model being realized in solidifiable resin, and includes: a base defining a Z axis; a plurality of wire-like elements all extending from the base, the wire-like elements intersecting each other to form a plurality of simple closed curves, which form a net around the Z axis. At least two of the simple closed curves of the plurality are identical to each other and the net includes: at least a first and a second sets of simple closed curves, each set forming a net sub-structure around the Z axis, the second set being adjacent to the first set along the Z axis; a plurality of object models; and a plurality of connecting branches joining the plurality of object models to the wire-like elements forming the net.

Abstract: A stereolithography machine (1, 100, 200) that comprises a support structure (1a) arranged resting on a substantially horizontal support plane (?) having a reference direction (X), a tank (2) coupled with the support structure (1a) and provided with a bottom (2a), a support group (5) coupled with the support structure (1a) for the movement above the tank (2) of a modelling plate (3) so that the modelling surface (3a) of such a modelling plate (3) faces, substantially in a parallel position, the bottom (2a).

Abstract: A light-curing oven (1; 100) comprising: a light-curing chamber (2) configured to contain one or more objects (A) to be light-cured; a source (3) of light-curing rays arranged inside the light-curing chamber (2); a vacuum pump (4) with a suction duct (5) communicating with the light-curing chamber (2) and a motorized structure (6; 106) for moving the objects (A) during the light-curing process. The motorized structure (6; 106) may comprise an electric motor (7; 107) with a drive shaft (8) mechanically associated with a support plate (9) for supporting the objects (A) to be light-cured. The electric motor (7; 107) and the drive shaft (8) being configured in such a way that they define for the objects (A) a horizontal rotation axis (X). The motorized structure (6; 106) may also comprise piezoelectric transducers (10; 110) for making the objects (A) vibrate during their rotation.

Abstract: The invention is a package (1) for stereolithography comprising a container (2) filled with stereolithography resin (3), provided with an access opening (4), and a mixer element (5) arranged in a removable manner in the container (2) and provided with at least one magnet (6).

Abstract: The invention is a method for producing a three-dimensional object in layers through stereolithography, comprising the following operations: moving a supporting surface (6a, 7a) near the bottom (2a) of a container (2) containing a liquid substance (3), so as to arrange it in a predefined operating position (17); selectively irradiating a layer (6) of liquid substance (3) with pre-defined radiation (4), in such a way as to solidify it against the supporting surface (6a, 7a). The approaching movement (11) comprises a plurality of approaching moves (12, 12a, 12b, 12c) having corresponding predefined lengths (13, 13a, 13b, 13c), spaced by corresponding intermediate stops (14, 14a, 14b) for corresponding predefined time intervals (15, 15a, 15b), the intermediate stops (14, 14a, 14b) being carried out when the supporting surface (6a, 7a) is at least partially immersed in the liquid substance (3).

Abstract: A three-dimensional object (1) made by way of a stereolithography process, includes a plurality of supports (3) that are connected to the body (2) of the object through joining elements (4) in each one of which it is possible to identify a shaped area (5), recessed with respect to the external surface of the joining element (4) and having the bottom corner (6) that delimits a pre-established fracture area (7) for the detachment of the support (3). Each one of the joining elements (4) includes a first body (8) projecting from the external surface that delimits the body (2) of the object and a second body (9) projecting from the support (3), the bodies (8) and (9) being connected to each other so as to define the shaped area (5) whose bottom corner (6) delimits the pre-established fracture area (7). Each one of the bodies (8, 9) has its convex curved external surface that constitutes part of the external surface of a sphere or an ellipsoid.

Abstract: A light-curing oven (1; 100) comprising: a light-curing chamber (2) configured to contain one or more objects (A) to be light-cured; a source (3) of light-curing rays arranged inside the light-curing chamber (2); a vacuum pump (4) with a suction duct (5) communicating with the light-curing chamber (2) and means (6; 106) for moving the objects (A) during the light-curing process. The moving means (6; 106) comprise an electric motor (7; 107) with a drive shaft (8) mechanically associated with means (9) for supporting the objects (A) to be light-cured, the electric motor (7; 107) and the drive shaft (8) being configured in such a way that they define for the objects (A) a horizontal rotation axis (X). The moving means (6; 106) also comprise means (10; 1 10) for making the objects (A) vibrate during their rotation.

Abstract: Method for producing a three-dimensional object in layers by way of a stereolithography machine (1) including a container (2) suited to contain a liquid substance (3), structure (5) suited to emit predefined radiation (4) suited to selectively solidify a layer (6) of the liquid substance (3) adjacent to the bottom (2a) of the container (2), and an actuator (8) suited to move the solidified layer (6a) with respect to the bottom (2a). The method includes selectively solidifying the liquid layer (6); separating the solidified layer (6a) from the bottom (2a) through a movement (11) suited to move them away from each other, including a plurality of shifts (12, 12a, 12b, 12c) for corresponding predefined lengths, spaced by corresponding intermediate stops (14, 14a, 14b) for corresponding predefined time intervals (15, 15a, 15b). The intermediate stops are carried out before the solidified layer has become completely detached from the bottom.

Abstract: The invention is a modeling plate (6; 6?; 6?) for a stereolithography machine (1) suited to produce three-dimensional objects (A) through superimposition of a plurality of layers (E) with predefined thickness of a liquid substance (3) that solidifies when subjected to a selective stimulation (4). The plate (6; 6?; 6?) comprises a work surface (7) that supports the object (A) and grooves (8) made in the work surface (7) along a development trajectory (X).

Abstract: The invention is a package (1) for stereolithography comprising a container (2) filled with stereolithography resin (3), provided with an access opening (4), and a mixer element (5) arranged in a removable manner in the container (2) and provided with at least one magnet (6).

Abstract: The invention is a method for producing a three-dimensional object in layers through stereolithography, comprising the following operations: moving a supporting surface (6a, 7a) near the bottom (2a) of a container (2) containing a liquid substance (3), so as to arrange it in a predefined operating position (17); selectively irradiating a layer (6) of liquid substance (3) with pre-defined radiation (4), in such a way as to solidify it against the supporting surface (6a, 7a). The approaching movement (11) comprises a plurality of approaching moves (12, 12a, 12b, 12c) having corresponding predefined lengths (13, 13a, 13b, 13c), spaced by corresponding intermediate stops (14, 14a, 14b) for corresponding predefined time intervals (15, 15a, 15b), the intermediate stops (14, 14a, 14b) being carried out when the supporting surface (6a, 7a) is at least partially immersed in the liquid substance (3).

Abstract: The invention is a modelling plate (6; 6?; 6?) for a stereolithography machine (1) suited to produce three-dimensional objects (A) through superimposition of a plurality of layers (E) with predefined thickness of a liquid substance (3) that solidifies when subjected to a selective stimulation (4). The plate (6; 6?; 6?) comprises a work surface (7) that supports the object (A) and grooves (8) made in the work surface (7) along a development trajectory (X).

Abstract: The invention is a stereolithography machine (1) comprising the following: a support plate (2) provided with a hole (2a); a container (3) associated with the support plate (2) and comprising a transparent bottom (3a); a radiation source (4) arranged below the support plate (2) and suited to convey a radiation beam towards the transparent bottom (3a) through the hole (2a); a temperature control unit (5) suited to maintain the support plate (2) at a predetermined temperature.

Abstract: A three-dimensional object (1) made by way of a stereolithography process, includes a plurality of supports (3) that are connected to the body (2) of the object through joining elements (4) in each one of which it is possible to identify a shaped area (5), recessed with respect to the external surface of the joining element (4) and having the bottom corner (6) that delimits a pre-established fracture area (7) for the detachment of the support (3). Each one of the joining elements (4) includes a first body (8) projecting from the external surface that delimits the body (2) of the object and a second body (9) projecting from the support (3), the bodies (8) and (9) being connected to each other so as to define the shaped area (5) whose bottom corner (6) delimits the pre-established fracture area (7). Each one of the bodies (8, 9) has its convex curved external surface that constitutes part of the external surface of a sphere or an ellipsoid.

Abstract: Method for producing a three-dimensional object in layers by way of a stereolithography machine (1) including a container (2) suited to contain a liquid substance (3), structure (5) suited to emit predefined radiation (4) suited to selectively solidify a layer (6) of the liquid substance (3) adjacent to the bottom (2a) of the container (2), and an actuator (8) suited to move the solidified layer (6a) with respect to the bottom (2a). The method includes selectively solidifying the liquid layer (6); separating the solidified layer (6a) from the bottom (2a) through a movement (11) suited to move them away from each other, including a plurality of shifts (12, 12a, 12b, 12c) for corresponding predefined lengths, spaced by corresponding intermediate stops (14, 14a, 14b) for corresponding predefined time intervals (15, 15a, 15b). The intermediate stops are carried out before the solidified layer has become completely detached from the bottom.

Abstract: The invention is a modelling plate (6; 6?; 6?) for a stereolithography machine (1) suited to produce three-dimensional objects (A) through superimposition of a plurality of layers (E) with predefined thickness of a liquid substance (3) that solidifies when subjected to a selective stimulation (4). The plate (6; 6?; 6?) comprises a work surface (7) that supports the object (A) and grooves (8) made in the work surface (7) along a development trajectory (X).

Abstract: The invention is a stereolithography machine (1) comprising the following: a support plate (2) provided with a hole (2a); a container (3) associated with the support plate (2) and comprising a transparent bottom (3a); a radiation source (4) arranged below the support plate (2) and suited to convey a radiation beam towards the transparent bottom (3a) through the hole (2a); a temperature control unit (5) suited to maintain the support plate (2) at a predetermined temperature.