Three-dimensional structured printing
First Claim
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1. A process for forming a three-dimensional article in sequential cross-sectional layers in accordance with a model of the article, the process comprising the steps of:
- defining a layer of powder material;
applying a liquid reagent to the powder layer in a pattern corresponding to a respective cross-sectional layer of the model; and
repeating these steps to form successive layers;
wherein the powder comprises a first reactive component selected from an organic or organometallic polymer, oligomer or monomer and the liquid reagent includes a second active component comprising an oxetane, the second active component causing a polymerization reaction to take place in said layer by chemically reacting with said first reactive component within the powder to form a new chemical component, and thereby to form substantially void-free regions in the article where the liquid reagent has been applied to the powder material and wherein the article which is formed has a tensile strength of greater than about 25 MPa.
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Abstract
A process for forming a three-dimensional article in sequential layers in accordance with a digital model of the article. The process comprises the steps of defining a layer of powder material, applying a liquid reagent to the powder layer in a pattern corresponding to the digital model, and repeating these steps to form successive layers. The powder comprises a first reactive component and the liquid includes a second active component capable of reacting with the first reactive component so that the article is built up in layers.
91 Citations
64 Claims
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1. A process for forming a three-dimensional article in sequential cross-sectional layers in accordance with a model of the article, the process comprising the steps of:
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defining a layer of powder material; applying a liquid reagent to the powder layer in a pattern corresponding to a respective cross-sectional layer of the model; and repeating these steps to form successive layers; wherein the powder comprises a first reactive component selected from an organic or organometallic polymer, oligomer or monomer and the liquid reagent includes a second active component comprising an oxetane, the second active component causing a polymerization reaction to take place in said layer by chemically reacting with said first reactive component within the powder to form a new chemical component, and thereby to form substantially void-free regions in the article where the liquid reagent has been applied to the powder material and wherein the article which is formed has a tensile strength of greater than about 25 MPa. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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43. A process for forming sequential cross-sectional layers of a three-dimensional article comprising:
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defining a layer of powder material; through a plurality of nozzles, applying a liquid reagent to the powder layer in a pattern corresponding to a respective cross-sectional layer of the model; repeating these steps to form successive layers; wherein the powder comprises a first reactive component selected from an organic or organometallic polymer, oligomer or monomer and the liquid reagent includes a second active component comprising an oxetane, the second active component causing a polymerization reaction to take place in said layer by chemically reacting with said first reactive component within the powder to form a new chemical component, and thereby to form substantially void-free regions of high strength in the article where the liquid reagent has been applied to the powder material and wherein the article which is formed has a tensile strength of greater than about 25 MPa. - View Dependent Claims (44, 45, 46, 47, 48, 49, 50, 51, 52, 53)
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54. A process for forming a substantially void-free three-dimensional article in sequential cross-sectional layers in accordance with a model of the article, the process comprising the steps of:
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defining a layer of powder material; via a plurality of micro-fine nozzles, jetting a liquid reagent onto the powder layer in a pattern corresponding to a respective cross-sectional layer of the model, said liquid reagent dissolving the powder material which comes into contact with it; repeating these steps to form successive layers; wherein the powder comprises a first reactive component selected from an organic or organometallic polymer, oligomer or monomer and the liquid reagent includes a second active component comprising an oxetane, the second active component causing a polymerization reaction to take place in said layer by chemically reacting with said first reactive component within the powder to form a new chemical component, and thereby forming substantially void-free regions of high strength in the article where the liquid reagent has been jetted on the powder layer and wherein the article which is formed has a tensile strength of greater than about 25 MPa. - View Dependent Claims (55, 56, 57, 58, 59, 60, 61, 62, 63, 64)
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Specification