Method for producing a three-dimensional object and stereolithography machine employing said method
First Claim
1. A method for producing a three-dimensional object in layers by means of a stereolithography machine of the type comprising:
- a container for containing a liquid substance suited to be solidified through exposure to predefined radiation;
means for emitting said predefined radiation, suited to selectively irradiate a layer of said liquid substance having a predefined thickness and arranged adjacent to the bottom of said container in order to solidify it;
actuator means suited to move said solidified layer with respect to said bottom at least according to a direction perpendicular to said bottom;
said method comprising the following operations;
selectively irradiating said layer of liquid substance in such a way as to obtain said solidified layer;
separating said solidified layer from said bottom through a mutual separation movement having a predefined extent, wherein said separation movement comprises a plurality of separation shifts for corresponding predefined lengths, spaced by corresponding intermediate stops for corresponding predefined time intervals, said intermediate stops being carried out before said solidified layer has become completely detached from said bottom.
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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.
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Citations
11 Claims
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1. A method for producing a three-dimensional object in layers by means of a stereolithography machine of the type comprising:
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a container for containing a liquid substance suited to be solidified through exposure to predefined radiation; means for emitting said predefined radiation, suited to selectively irradiate a layer of said liquid substance having a predefined thickness and arranged adjacent to the bottom of said container in order to solidify it; actuator means suited to move said solidified layer with respect to said bottom at least according to a direction perpendicular to said bottom; said method comprising the following operations; selectively irradiating said layer of liquid substance in such a way as to obtain said solidified layer; separating said solidified layer from said bottom through a mutual separation movement having a predefined extent, wherein said separation movement comprises a plurality of separation shifts for corresponding predefined lengths, spaced by corresponding intermediate stops for corresponding predefined time intervals, said intermediate stops being carried out before said solidified layer has become completely detached from said bottom. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 11)
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10. A stereolithography machine comprising:
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a container for containing a liquid substance suited to be solidified through exposure to predefined radiation; means for emitting said predefined radiation, suited to selectively irradiate a layer of said liquid substance having a predefined thickness and arranged adjacent to the bottom of said container in order to solidify it; actuator means suited for moving said solidified layer with respect to said bottom according to a direction perpendicular to said bottom; and a logic control unit operatively connected to said emitting means and to said actuator means, the logic control unit activates the actuator means intermittently, so that, for each solidified layer, the solidified layer is moved by plurality of separation shifts for corresponding predefined lengths, spaced by corresponding intermediate stops for corresponding predefined time intervals.
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Specification