摘要:
The invention is a stereolithography machine (1) comprising: a tank (2) with a bottom (2a); a supporting unit (5) associated with moving means (4) suited to move it according to a direction of movement (Z) which is orthogonal to the bottom (2a); a modelling plate (3) having a modelling surface (3a) facing the bottom (2a) in order to support a three-dimensional object; a coupling unit (6) suited to removably connect the modelling plate (3) to the supporting unit (5) and comprising a housing (7) and a spherical body (8) revolvingly arranged in the housing (7); releasable clamping means (9) suited to be operated in such a way as to press the housing (7) and the spherical body (8) against each other so as to make them integral with each other and to make the modelling plate (3) integral with the supporting unit (5).
摘要:
that precede a reference layer (4) in the succession; defining a mask area (9) corresponding to the logical conjunction of the geometric representations of the reference layer (4) and of the selected layers (2) reproduced on the plane of the reference layer (4); exposing the liquid material to the predefined radiation (6) in the mask area (9). According to the method, before defining the mask area (9) the geometric representations of the selected layers (2) are modified in order to extend them with corresponding additional portions (2a) that project with respect to the geometric representations of the corresponding layers (2) as configured before the modification, wherein the additional portions (2a) are defined to compensate for the reduced solidifying effect of the predefined radiation (6) on the liquid material due to its penetration in the liquid material down to the depths corresponding to the layers (2), so that the outline of the portion of the three-dimensional object (10) obtained following the solidification of the group of layers approximates more precisely the outline (11) of the three-dimensional object (10).
摘要:
The invention is a method for producing a three-dimensional object (11) in layers by means of a stereolithography machine (1) comprising: a container (2) containing a fluid substance (3) suited to solidify through exposure to predefined radiation (4a); means (4) suited to emit the predefined radiation (4a) and to solidify a layer of the fluid substance (3) adjacent to the bottom (2a) of the container (2); a modelling plate (5) suited to support the solidified layer (6) and associated with actuator means (7) suited to move it perpendicular to the bottom (2a) of the container (2); levelling means (8) arranged in contact with the fluid substance (3), the levelling means (8) comprising a paddle (9) developed according to a longitudinal direction and having an edge facing the container's bottom (2a) and arranged inside the container (2). The method comprises the following operations: selectively irradiating the layer of fluid substance (3) to obtain the solidified layer (6); extracting the solidified layer (6) from the fluid substance (3); redistributing the fluid substance (3) in the container (2) by moving the levelling means (8) so that they are passed between the modelling plate (5) and the container (2).
摘要:
The invention is a computer-implemented method for defining a supporting structure (2) for a three-dimensional object (1) to be produced through a stereolithography process, comprising the following operations: defining a first surface (3) to be supported of the three-dimensional object (1) and a second surface (4) facing the first surface (3); defining elongated supporting elements (5) between the surfaces (3, 4); defining pairs of supporting elements (5); for each pair of supporting elements (5), defining an elongated reinforcing element (6) connecting the two supporting elements (5) of the pair. The definition of the pairs of supporting elements (5) comprises the following operations: defining a reference point (7) of each supporting element (5); defining a connected acyclic graph (8) having as vertices the reference points (7); for each edge (9) of the graph, defining one pair of supporting elements comprising the two supporting elements (5) corresponding to the ends of the edge (9). The definition of the pairs of supporting elements (5) comprises the further operation of defining an additional pair of supporting elements for each vertex having order 1 of the connected acyclic graph (8), the additional pair comprising a first supporting element (5) corresponding to the vertex having order 1 and a second supporting element (5) not connected to the first supporting element (5) through any edge (9).
摘要:
The invention is a method for producing a three-dimensional object (11) in layers by means of a stereolithography machine (1) comprising: a container (2) containing a fluid substance (3) suited to solidify through exposure to predefined radiation (4a); means (4) suited to emit the predefined radiation (4a) and to solidify a layer of the fluid substance (3) adjacent to the bottom (2a) of the container (2); a modelling plate (5) suited to support the solidified layer (6) and associated with actuator means (7) suited to move it perpendicular to the bottom (2a) of the container (2); levelling means (8) arranged in contact with the fluid substance (3), the levelling means (8) comprising a paddle (9) developed according to a longitudinal direction and having an edge facing the container's bottom (2a) and arranged inside the container (2). The method comprises the following operations: selectively irradiating the layer of fluid substance (3) to obtain the solidified layer (6); extracting the solidified layer (6) from the fluid substance (3); redistributing the fluid substance (3) in the container (2) by moving the levelling means (8) so that they are passed between the modelling plate (5) and the container (2).
摘要:
The invention is a method for producing a three-dimensional object (11) in layers by means of a stereolithography machine (1) comprising: a container (2) containing a fluid substance (3) suited to solidify through exposure to predefined radiation (4a); means (4) suited to emit the predefined radiation (4a) and to solidify a layer of the fluid substance (3) adjacent to the bottom (2a) of the container (2); a modelling plate (5) suited to support the solidified layer (6) and associated with actuator means (7) suited to move it perpendicular to the bottom (2a) of the container (2); levelling means (8) arranged in contact with the fluid substance (3), the levelling means (8) comprising a paddle (9) developed according to a longitudinal direction and having an edge facing the container's bottom (2a) and arranged inside the container (2). The method comprises the following operations: selectively irradiating the layer of fluid substance (3) to obtain the solidified layer (6); extracting the solidified layer (6) from the fluid substance (3); redistributing the fluid substance (3) in the container (2) by moving the levelling means (8) so that they are passed between the modelling plate (5) and the container (2).