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US 7,531,117 B2Granted
Method for constructing patterns in a layered manner
OwnerIngo Ederer, Rainer Höchsmanninventors
Life of this patent
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Abstract
A process to produce models in layers is described, whereby a first material and then selectively a second material is applied in layers on a building platform and these two application stages are repeated until a desired pattern is achieved. The two materials form a solid if a suitable mixture ratio is used and the first material is a material mixture. The material mixture is at least partially prepared prior to each application stage.
Claims16
A method for producing models in layers, comprising:
- (a) applying a first material in a layer on a building platform wherein the first material comprises a particulate material and a first reactive component;
- (b) selectively applying a second material to the first layer via a droplet production technique, wherein the second material comprises a second reactive component and a non-reacting carrying agent and calculating a quantity xt of the non-reactive carrier agent to be used in the second material based upon the formula
- x
- t
- =
- m
- h
- (
- r
- p
- 0
- ,
- 0254
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- 2
- ·
- v
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- d
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- A
- b
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- ρ
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- wherein mh is quantity of the first reactive component as determined by the product of the weight of the particulate material of the first material and a desired proportional mass of the first reactive component, rp is a value of resolution in dots per inch of the droplet production technique, νf,d is a volume of liquid particles in the second material, Ab is an area of the layer to recieve the second material, and ρh is the density of the second reactive component;
- (c) curing the first and second materials to form a solid;
- and
- (d) repeating steps (a) and (b) to achieve a plurality of layers to form a model,
- wherein the first material is a mixture of at least two components that is at least partially prepared prior to each applying step.
29 more elements
A method for producing models in layers, comprising:
- (a) applying a first material mixture in a layer on a building platform wherein the first material mixture comprises a quartz sand and a epoxy resin, wherein the epoxy resin is present between about 0.6 and 1.8% of the total weight of in the first material mixture;
- (b) selectively applying a second material mixture to the first layer via a droplet production technique, wherein the second material comprises a second reactive component and a non-reacting carrying agent, wherein a quantity xt of non-reactive carrier agent to be used in the second material is calculating based upon the formula
- x
- t
- =
- m
- h
- (
- r
- p
- 0
- ,
- 0254
- )
- 2
- ·
- v
- f
- ,
- d
- ·
- A
- b
- ·
- ρ
- h
- ,
- wherein mh is quantity of the epoxy resin as determined by the product of the weight of the quartz sand of the first material and a desired proportional mass of the epoxy resin, rp is a value of resolution in dots per inch of the droplet production technique, νf,d is a volume of liquid particles in the second material, Ab is an area of the layer to recieve the second material, and ρh is the density of the second reactive component;
- (d) curing the first and second materials to form a solid;
- and
- (e) repeating steps (a) through (c) to achieve a plurality of layers to form a model,
- wherein the first material mixture is at least partially prepared prior to each applying step.
29 more elements
Dependencies are inferred from the claim text.