Fast three-dimensional modeling method and device
First Claim
1. A method for applying a uniform layer of a viscous material in a layerwise fashion in a rapid prototyping apparatus, the method comprising the steps of:
- providing a working field for forming layers of the viscous material;
supplying a volume of the viscous material adjacent the working field, the viscous material having a viscosity greater than about 10,000 centipoise; and
applying at least a portion of the volume of the viscous material over the working field to form the uniform layer utilizing at least one recoater blade and at least one rotating roller, the recoater blade and roller being driven in a coating direction when applying the viscous material, the rotating roller contacting the volume of viscous material and establishing a log of viscous material circulating along a looping path about the rotating roller, the recoater blade being downstream from the roller when driven in the coating direction, the recoater blade being in communication with the log of viscous material to channel the viscous material circulating along the looping path when the recoater blade and roller are driven across the working field in the coating direction.
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Accused Products
Abstract
The invention concerns a fast three-dimensional modeling method comprising the following steps: a phase which consists in transforming the raw material in the work space (32) by means of a device inducing transformation (1); at least at one moment, a phase which consists in supplying non-transformed material, downstream of the doctor blade; a phase which consists in covering the transformed material (PI) with non-transformed material (MAT), which consists in moving the blade in a direction (F), driving in rotation about an axis a rolling member (26, 27) whereon an extruded log of non-transformed raw material (28) is wound, arranging a pushing member (22) such that its proximal edge (23) coincides with the surface of said work space, and positioning said rolling member downstream of the pushing member, and opposite thereof, so as to channel the extruded log of non-tramsformed material towards a cavity formed between the proximal edge and the rolling member facing it.
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Citations
33 Claims
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1. A method for applying a uniform layer of a viscous material in a layerwise fashion in a rapid prototyping apparatus, the method comprising the steps of:
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providing a working field for forming layers of the viscous material;
supplying a volume of the viscous material adjacent the working field, the viscous material having a viscosity greater than about 10,000 centipoise; and
applying at least a portion of the volume of the viscous material over the working field to form the uniform layer utilizing at least one recoater blade and at least one rotating roller, the recoater blade and roller being driven in a coating direction when applying the viscous material, the rotating roller contacting the volume of viscous material and establishing a log of viscous material circulating along a looping path about the rotating roller, the recoater blade being downstream from the roller when driven in the coating direction, the recoater blade being in communication with the log of viscous material to channel the viscous material circulating along the looping path when the recoater blade and roller are driven across the working field in the coating direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
detaching the log of material from the roller and recoater blade after the roller and recoater blade have been driven across the working field in the coating direction.
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9. The method of claim 8 wherein the step of applying the volume of material over the working field is repeated in a second coating direction, the step of applying the material being performed with at least two recoater blades and at least two rollers, at least one recoater blade and at least one roller for applying the material when driven in the first coating direction, and at least one recoater blade and at least one roller for applying the material when driven in the second coating direction.
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10. The method of claim 9 wherein the step of applying the volume of material over the working field is repeated in the first and the second coating directions until the uniform layer has been established.
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11. The method of claim 10 further comprising the step of:
transforming the uniform layer of material to form a layer of a three-dimensional object.
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12. The method of claim 11 wherein the steps are repeated until all the layers of the three-dimensional object are formed.
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13. A system for applying a uniform layer of a viscous material in a layerwise fashion in a rapid prototyping apparatus, the system comprising:
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a means for providing a working field for forming layers of the viscous material;
a means for supplying a volume of the viscous material adjacent the working field, the viscous material not flowing when a shear stress of less than about 20n/m2 is applied;
a means for applying at least a portion of the volume of viscous material over the working field to form the uniform layer, the means for applying the viscous material comprising at least one recoater blade and at least one rotating roller to form the uniform layer when the recoater blade and roller are driven in a coating direction;
a drive mechanism for moving the recoater blade and roller in the coating direction; and
a means for rotating the roller, the roller contacting the volume of viscous material and establishing a log of viscous material circulating along a looping path about the rotating roller, the recoater blade being downstream from the roller when driven in the coating direction, the recoater blade being in communication with the log of viscous material to channel the material circulating along the looping path when the recoater blade and roller are driven across the working field in the coating direction. - View Dependent Claims (14, 15, 16, 17, 19, 20, 21, 22, 23)
a means for transforming the uniform layer of material to form a layer of a three-dimensional object prior to forming another uniform layer of material.
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18. The system of 13 wherein the viscous material has a viscosity of greater than about 10,000 centipoise.
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24. A rapid prototyping apparatus for forming a three-dimensional object from a viscous material in a plurality of layers, the apparatus comprising:
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a means for providing a working field for forming layers of the material;
a means for supplying a volume of the material adjacent the working field;
a means for applying at least a portion of the volume of material over the working field to form a uniform layer of the material, the means for applying the material comprising at least one recoater blade and at least two rotating roller to form the uniform layer when the recoater blade and roller are driven across the working field in a coating direction;
a drive mechanism for moving the recoater blade and rollers in the coating direction;
a means for rotating the rollers, the rollers contacting the volume of material and establishing a log of material circulating along a looping path about both rotating rollers, the recoater blade being downstream from the rollers when driven in the coating direction, the recoater blade being in communication with the log of material to channel the material circulating along the looping path when the recoater and rollers are driven in the coating direction; and
,a means for transforming the uniform layer of material to form a layer of a three-dimensional object prior to forming another uniform layer of material. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33)
a means for detaching the log of material from the rollers and recoater blade after the rollers and recoater blade have traveled past the working field in either the first coating direction or the second coating direction.
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30. The apparatus of claim 29 wherein the at least one recoater blade and at least one roller apply the material when driven in the first coating direction, and at least one recoater blade and at least one roller apply the material when driven in the second coating direction.
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31. The apparatus of claim 30 further comprising a second means for supplying a volume of material adjacent the working field, the first means for supplying a volume of material being in communication with the means for applying the material prior to moving the recoater blade and the at least one roller in the first coating direction, and the second means for supplying a volume of material being in communication with the means for applying the material prior to moving the recoater blade and the at least one roller in the second coating direction.
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32. The apparatus of claim 31 wherein the recoater blade and the at least one roller for applying the material when driven in the first coating direction are inactive when means for applying the material is driven in the second coating direction, and the recoater blade and the at least one roller for applying the material when driven in the second coating direction are inactive when the means for applying the material is driven in the first coating direction.
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33. The apparatus of claim 32 wherein the first and second means for supplying a volume of material each have an opening in which the volume of material is delivered, the openings being on opposed ends of the working field.
Specification