# US 2019/0315052 A1 · Method of producing three-dimensional shaped article

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- Number: US 2019/0315052 A1
- Document ID: US20190315052A1
- Status: Published application
- Kind: A1
- Application number: 16/453,786
- Filed: 2019-06-26
- Published: 2019-10-17
- Earliest claimed: 2014-03-07
- Assignees: Canon Kabushiki Kaisha
- Applicants: Canon Kabushiki Kaisha
- Inventors: Yukio Hanyu; Akira Sugiyama; Naotake Sato; Tatsuya Tada; Satoru Yamanaka
- Web page: https://patentgrep.com/patent/US20190315052A1

## CPC

- B29C 64/147: using sheet material, e.g. laminated object manufacturing [LOM] or laminating sheet material precut to local cross sections of the 3D object
- B29C 64/141: using only solid materials
- B29C 64/165: using a combination of solid and fluid materials, e.g. a powder selectively bound by a liquid binder, catalyst, inhibitor or energy absorber
- B29C 64/223: Foils or films, e.g. for transferring layers of building material from one working station to another
- B29C 64/40: Structures for supporting 3D objects during manufacture and intended to be sacrificed after completion thereof
- B33Y 10/00: Processes of additive manufacturing
- B33Y 40/20: Post-treatment, e.g. curing, coating or polishing
- G03G 15/22: involving the combination of more than one step according to groups G03G13/02 - G03G13/20 (G03G15/01 takes precedence)
- G03G 15/224: {Machines for forming tactile or three dimensional images by electrographic means, e.g. braille, 3d printing}
- B29K 2105/251: {Particles, powder or granules (expandable particles B29K2105/046)}
- B29K 2995/0062: water-soluble
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- B33Y: ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS

## Abstract

A method of producing a three-dimensional shaped article includes a step of forming particle layers by arranging particles containing a material for forming a shaped article and particles containing a material having higher solubility in fluid than the material for forming the shaped article, a step of forming a stack by melting and stacking the particle layers, and a step of removing the material having higher solubility in the fluid than the material for forming the shaped article from the stack by dissolving the material having higher solubility in the fluid than the material for forming the shaped article in the fluid.

## Claims

### Claim 1

A method of producing a three-dimensional shaped article made of an article material, the method comprising:
forming layers including a region made of the article material and a region made of a support material;
forming a stack by melting and stacking the layers; and
removing the region made of the support material from the stack,
wherein the support material contains a first material having a dynamic viscoelasticity higher than a dynamic viscoelasticity of the article material and a second material having a dynamic viscoelasticity lower than the dynamic viscoelasticity of the article material, and
wherein a difference between a dynamic viscoelasticity of the support member and the dynamic viscoelasticity of the article material is smaller than a difference between the dynamic viscoelasticity of the first material and the dynamic viscoelasticity of the article material and is smaller than a difference between the dynamic viscoelasticity of the second material and the dynamic viscoelasticity of the article material.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the region made of the support member is selectively removed from the stack with use of a liquid containing water.

### Claim 3 (depends on 1)

The method according to claim 1, wherein a main component of the liquid containing water is water.

### Claim 4 (depends on 2)

The method according to claim 2, wherein at least one of the first material and the second material is a water-soluble material.

### Claim 5 (depends on 3)

The method according to claim 3, wherein the water-soluble material is a compound containing a hydroxy group.

### Claim 6 (depends on 3)

The method according to claim 3, wherein the water-soluble material is a water-soluble carbohydrate.

### Claim 7 (depends on 2)

The method according to claim 2, wherein the water-soluble material is the article material is at least one of polypropylene, an acrylonitrile-butadiene-styrene copolymer, polymethyl methacrylate, and polyvinyl acetate.

### Claim 8 (depends on 1)

The method according to claim 1, wherein the article material and the support material are particles.

### Claim 9 (depends on 8)

The method according to claim 8, wherein electrophotography is used for forming the layers including the region made of the article material and the region made of the support material.